WO2021027348A1 - 磁集成器件、功率变换电路、充电器及电动车辆 - Google Patents

磁集成器件、功率变换电路、充电器及电动车辆 Download PDF

Info

Publication number
WO2021027348A1
WO2021027348A1 PCT/CN2020/089871 CN2020089871W WO2021027348A1 WO 2021027348 A1 WO2021027348 A1 WO 2021027348A1 CN 2020089871 W CN2020089871 W CN 2020089871W WO 2021027348 A1 WO2021027348 A1 WO 2021027348A1
Authority
WO
WIPO (PCT)
Prior art keywords
transformer winding
conversion circuit
power conversion
integrated device
magnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/089871
Other languages
English (en)
French (fr)
Inventor
梁永涛
刘卫平
智彦军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to BR112021014228A priority Critical patent/BR112021014228A2/pt
Priority to EP20852993.3A priority patent/EP3923307B1/en
Publication of WO2021027348A1 publication Critical patent/WO2021027348A1/zh
Priority to US17/588,202 priority patent/US11527354B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/38—Auxiliary core members; Auxiliary coils or windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33573—Full-bridge at primary side of an isolation transformer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2804—Printed windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2871—Pancake coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/346—Preventing or reducing leakage fields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/0074—Plural converter units whose inputs are connected in series
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/01—Resonant DC/DC converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • H02M3/33584—Bidirectional converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/285—Single converters with a plurality of output stages connected in parallel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Definitions

  • This application relates to the field of power electronics technology, in particular to a magnetic integrated device, a power conversion circuit, a charger and an electric vehicle.
  • a magnetic integrated device is a device that integrates multiple discrete devices (such as inductors and transformers) in a power conversion circuit.
  • the magnetic integrated device includes a magnetic core, an inductance winding wound on the magnetic core, and a transformer winding wound on the magnetic core.
  • the transformer winding usually includes a DC bus side winding, a high-voltage winding and a low-voltage winding, a total of three windings.
  • This application provides a magnetic integrated device, a power conversion circuit, a charger, and an electric vehicle, which can solve the problem of large volume of the magnetic integrated device in related technologies.
  • the technical solution is as follows:
  • a magnetic integrated device including: a magnetic core, a first transformer winding, and a second transformer winding;
  • the magnetic core is provided with a window, and the first transformer winding and the second transformer winding are respectively wound on the magnetic core through the window;
  • first transformer winding and the second transformer winding are wound separately, and a first air gap is formed at the separation.
  • the leakage inductance can be equivalent to the resonant inductance in the power conversion circuit, so there is no need to separately set inductance windings in the magnetic integrated device, which effectively reduces the volume of the magnetic integrated device And weight.
  • the power conversion circuit adopting the magnetic integrated device has a smaller volume and a higher power density.
  • the magnetic integrated device may further include a third transformer winding, and the third transformer winding is wound on the magnetic core through the window.
  • the magnetic integrated device can be applied to a three-port power conversion circuit.
  • the third transformer winding and the second transformer winding are laminated and wound.
  • the layered winding method can reduce the occupied space of the transformer winding, thereby effectively reducing the volume of the magnetic integrated device.
  • the winding method can ensure tight coupling between the third transformer winding and the second transformer winding.
  • the third transformer winding may be flat, and the third transformer winding may cover the surface of the second transformer winding.
  • part of the surface of the second transformer winding may be covered, and the terminals of the second transformer winding are not covered by the third transformer winding, so as to facilitate the connection with the external circuit.
  • the number of turns of the first transformer winding and the number of turns of the second transformer winding are both greater than the number of turns of the third transformer winding.
  • the third transformer winding may be a winding for connecting an auxiliary battery with a lower voltage.
  • One of the first transformer winding and the second transformer winding can be used to connect to a DC bus, and the other can be used to connect to a power battery.
  • the line width of the first transformer winding and the line width of the second transformer winding are both smaller than the line width of the third transformer winding.
  • the magnetic integrated device further includes: a magnetic column located in the window and between the first transformer winding and the second transformer winding;
  • One side of the magnetic column is in contact with the magnetic core, and the other side of the magnetic column has a gap with the magnetic core.
  • the magnetic column and the magnetic core may be an integral structure.
  • the size of the gap between the magnetic column and the magnetic core can be adjusted, thereby realizing the adjustment of the size of the first air gap, thereby realizing the adjustment of the leakage inductance of the magnetic integrated device.
  • the magnetic core includes: a first magnet and a second magnet, one or more of the first magnet and the second magnet are formed with grooves; the first magnet and the second magnet are arranged oppositely And enclose the window.
  • the second magnet may be a U-shaped magnet formed with a groove, and no groove is formed on the first magnet.
  • each transformer winding in the magnetic integrated device can be respectively wound on the first magnet and the second magnet.
  • the number of turns of each transformer winding on the first magnet and the number of turns on the second magnet may be equal.
  • the symmetry of the overall structure of the magnetic integrated device can be ensured.
  • the magnetic core may also be an integral piece provided with a through groove, and the through groove is formed as the window.
  • one or more second air gaps are provided at one end of the magnetic core, and the second air gaps are in communication with the window.
  • the magnetic permeability of the magnetic core can be reduced, and on the other hand, the magnetic saturation phenomenon under the AC large signal or DC bias can be avoided, and the magnetic integration can be better controlled The inductance of the device.
  • the window may be a rectangular window.
  • a power conversion circuit may include: the magnetic integrated device provided in the foregoing aspect;
  • the first transformer winding can be connected to the first port of the power conversion circuit
  • the second transformer winding can be connected to the second port of the power conversion circuit
  • the first transformer winding and the second transformer The windings can transfer energy to each other through electromagnetic mutual inductance.
  • the power conversion circuit may further include: a third transformer winding wound on the magnetic core through the window;
  • the third transformer winding is connected to the third port of the power conversion circuit, the third transformer winding and the first transformer winding can transfer energy to each other through electromagnetic mutual inductance, the third transformer winding and the second transformer winding can pass electromagnetic Mutual inductance transfers energy to each other.
  • the power conversion circuit may further include: three chopper sub-circuits; each of the first transformer winding, the second transformer winding, and the third transformer winding is connected to one port through a chopper sub-circuit.
  • the chopper sub-circuit can be a bridge rectifier circuit.
  • the power conversion circuit may further include: a resonance element connected to one or more transformer windings of the first transformer winding and the second transformer winding in the magnetic integrated device. That is, the power conversion circuit can be a resonant or quasi-resonant power conversion circuit.
  • the resonance element may include: a capacitor; the capacitor may be connected in series with the first transformer winding or the second transformer winding in the magnetic integrated device.
  • the resonance element may include: a first capacitor and a second capacitor; the first capacitor is connected in series with the first transformer winding in the magnetic integrated device, and the second capacitor is connected with the second transformer winding in the magnetic integrated device In series.
  • the resonance element may include: a capacitor and an inductance; the capacitor is connected in series with the first transformer winding or the second transformer winding in the magnetic integrated device; and the inductance is connected in parallel with the first transformer winding or the second transformer winding.
  • a power conversion circuit in yet another aspect, the power conversion circuit has three ports, and the power conversion circuit includes: a resonance element, a first transformer, and a second transformer;
  • the primary side of the first transformer is connected in series with the resonant element, the secondary side of the first transformer is connected to the first port of the three ports; the primary side of the second transformer is connected in series with the first transformer and the resonance element
  • the components are connected in parallel and connected to the second port of the three ports, and the secondary side of the second transformer is connected to the third port of the three ports.
  • the first transformer and the resonant element are connected in series and then connected in parallel with the primary side of the second transformer, the effect of the resonant element on the output voltage of the secondary side of the second transformer can be avoided, and the The output voltage of the secondary side has a small fluctuation range, and the stability of the output voltage is high, which reduces the pressure of the subsequent circuit.
  • a charger including: an AC-DC conversion circuit and the power conversion circuit provided in the above-mentioned aspect, and the second port of the power conversion circuit is connected to the AC-DC conversion circuit.
  • an electric vehicle including: a power battery, an auxiliary battery, and the charger provided in the above-mentioned aspect; the first port of the power conversion circuit in the charger is connected to the power battery, and the third port is connected to the auxiliary battery. Battery connection.
  • the embodiments of the present application provide a magnetic integrated device, a power conversion circuit, a charger, and an electric vehicle.
  • the two transformer windings in the magnetic integrated device can be wound separately, and the separation forms a first gas Gap. Since the magnetic lines of force can pass through the first air gap to form leakage inductance, the leakage inductance can be equivalent to the resonant inductance in the power conversion circuit, so there is no need to separately set inductance windings in the magnetic integrated device, which effectively reduces the volume of the magnetic integrated device And weight.
  • the power conversion circuit adopting the magnetic integrated device has a smaller volume and a higher power density.
  • Figure 1 is a schematic structural diagram of a charger provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a charging method of a charger provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of another charging method of a charger provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of another charging method of a charger provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of another charging method of a charger provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of another charging method of a charger provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of another charging method of a charger provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a magnetic integrated device provided by an embodiment of the present application.
  • FIG. 9 is an equivalent circuit diagram of a magnetic integrated device provided by an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of another magnetic integrated device provided by an embodiment of the present application.
  • FIG. 11 is an equivalent circuit diagram of another magnetic integrated device provided by an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of another magnetic integrated device provided by an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a magnet provided by an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of another magnet provided by an embodiment of the present application.
  • 15 is a schematic structural diagram of another magnet provided by an embodiment of the present application.
  • FIG. 16 is a circuit diagram of a power conversion circuit provided by an embodiment of the present application.
  • FIG. 17 is a circuit diagram of another power conversion circuit provided by an embodiment of the present application.
  • FIG. 18 is a circuit diagram of yet another power conversion circuit provided by an embodiment of the present application.
  • FIG. 19 is a circuit diagram of still another power conversion circuit provided by an embodiment of the present application.
  • FIG. 20 is a circuit diagram of still another power conversion circuit provided by an embodiment of the present application.
  • FIG. 1 is a schematic structural diagram of a charger provided by an embodiment of the present application.
  • the charger 01 may include an alternating current/direct current (AC/DC) conversion circuit 011 and a power conversion circuit 012, the power conversion circuit 012 may also be called a DCDC power converter.
  • AC/DC alternating current/direct current
  • the power conversion circuit 012 may also be called a DCDC power converter.
  • One end of the AC/DC can be connected to an AC power source, and the other end can be connected to a DC bus, and the DC bus is connected to the power conversion circuit 012.
  • the DCDC power converter 012 used in the charger 01 may be a three-port DCDC power converter.
  • the three ports of the DCDC power converter 012 can be respectively used to connect the DC bus, the power battery 02 and the auxiliary battery 03, and the DCDC power converter 012 can realize power conversion between any two ports.
  • the power battery 02 can be used to supply power to the driving motor of the electric drive device, and its voltage is relatively high, generally 300 volts (V) to 600V, so the power battery 02 can also be called a high-voltage battery.
  • the auxiliary battery 03 can be used to power other electrical equipment in the electric drive equipment (such as the electronic brake system, instrument panel and light control system of electric vehicles, etc.). Its voltage is low, generally 12V to 15V, so the auxiliary battery 03 It can also be called a low-voltage battery.
  • the charger 01 integrated with the DCDC power converter 012 can realize the two-way communication between the AC power source and the power battery 02. powered by.
  • the charger 01 can realize bidirectional power supply between the AC power source and the auxiliary battery 03.
  • the charger 01 can realize bidirectional power supply between the power battery 02 and the auxiliary battery 03.
  • the charger 01 can realize that the AC power supply supplies power to the power battery 02 and the auxiliary battery 03 at the same time.
  • the charger 01 can realize that the auxiliary battery 03 supplies power to the AC power source and the power battery 02 at the same time.
  • the charger 01 can realize that the power battery 02 simultaneously supplies power to the AC power source and the auxiliary battery 03.
  • the DCDC power converter 012 may adopt a resonant or quasi-resonant three-port DCDC power converter.
  • the resonant inductor and transformer in the resonant or quasi-resonant three-port DCDC power converter can be It is realized by magnetic integrated device.
  • the charger 01 provided in the embodiment of the present application may be an on-board charger (OBC) applied to an electric vehicle.
  • OBC on-board charger
  • the charger 01 can also be applied to other electric drive devices, for example, it can also be applied to a cleaning robot.
  • FIG. 8 is a schematic structural diagram of a magnetic integrated device provided by an embodiment of the present application.
  • the magnetic integrated device may be applied to a power conversion circuit, for example, may be applied to the power conversion circuit shown in any one of the drawings in FIGS. 1 to 7 012 in.
  • the magnetic integrated device may include a magnetic core 10, a first transformer winding 20 and a second transformer winding 30.
  • the magnetic core 10 is provided with a window 100, and the first transformer winding 20 and the second transformer winding 30 can be wound on the magnetic core 10 through the window 100 respectively.
  • the window 100 may be a through slot opened on the magnetic core 10.
  • the first transformer winding 20 and the second transformer winding 30 may be separately wound on the magnetic core 10, and the separation may form a first air gap 10a.
  • the magnetic field lines generated by the first transformer winding 20 and the magnetic field lines generated by the second transformer winding 30 may pass through the first air gap 10a to form a leakage inductance, which may be equivalent to a resonance inductance in a power conversion circuit. Therefore, the magnetic integrated device does not need to be separately provided with an inductance winding, which effectively reduces the volume and weight of the magnetic integrated device.
  • FIG. 9 is an equivalent circuit diagram of a magnetic integrated device provided by an embodiment of the present application.
  • the first transformer winding 20 and the second transformer winding 30 can be equivalent to a two-port power Converter.
  • the leakage inductance formed by the first air gap 10 a between the first transformer winding 20 and the second transformer winding 30 can be equivalent to the resonant inductance L0 in series with the second transformer winding 30.
  • the embodiments of the present application provide a magnetic integrated device.
  • Two transformer windings in the magnetic integrated device can be wound separately, and a first air gap is formed at the separation. Since the magnetic lines of force can pass through the first air gap to form leakage inductance, the leakage inductance can be equivalent to the resonant inductance in the power conversion circuit, so there is no need to separately set inductance windings in the magnetic integrated device, which effectively reduces the volume of the magnetic integrated device And weight.
  • the power conversion circuit adopting the magnetic integrated device has a smaller volume and a higher power density.
  • FIG. 10 is a schematic structural diagram of another magnetic integrated device provided by an embodiment of the present application.
  • the magnetic integrated device may further include a third transformer winding 40.
  • the third transformer winding 40 can be wound on the magnetic core 10 through the window 100.
  • the first transformer winding 20, the second transformer winding 30, and the third transformer winding 40 can be equivalent to a three-port power converter.
  • the third transformer winding 40 and the second transformer winding 30 may be wound by stacking. That is, the third transformer winding 40 and the second transformer winding 30 can be wound in a concentric manner.
  • the layered winding method can reduce the occupied space of the transformer winding, thereby effectively reducing the volume of the magnetic integrated device.
  • FIG. 11 is an equivalent circuit diagram of a magnetic integrated device when the second transformer winding and the third transformer winding are laminated and wound according to an embodiment of the present application. Referring to FIG. 11, it can be seen that this winding method can ensure the third transformer The winding 40 and the second transformer winding 30 are tightly coupled, and there is no leakage inductance or only a small leakage inductance between the two, which can effectively reduce the loss of power transmission between the two, thereby improving the Power transmission efficiency.
  • the third transformer winding 40 can also be wound separately from the second transformer winding 30 or the first transformer winding 20.
  • the first transformer winding 20, the second transformer winding 30, and the third transformer winding 40 may be separately wound on the magnetic core 10 in sequence.
  • the embodiment of the present application does not limit the winding position of the third transformer winding 40.
  • one of the first transformer winding 20 and the second transformer winding 30 may be a winding for connecting a DC bus, and the other winding may be a winding for connecting a power battery 02 or an auxiliary battery 03 Winding.
  • FIG. 12 is a schematic structural diagram of another magnetic integrated device provided by an embodiment of the present application.
  • the number of turns of the first transformer winding 20 and the number of turns of the second transformer winding 30 The number may be greater than the number of turns of the third transformer winding 40. That is, the third transformer winding 40 may be a winding for connecting the auxiliary battery 03 with a lower voltage.
  • the first transformer winding 20 may be used to connect to a power battery 02
  • the second transformer winding 30 may be used to connect to a DC bus. It can be seen in conjunction with Figure 11 that when the third transformer winding 40 and the second transformer winding 30 are laminated and wound, the third transformer winding 40 (ie the winding on the auxiliary battery 03 side) can skip the resonant inductance L0 and directly connect with the DC Bus coupling.
  • the voltage of the DC bus is relatively stable, it can be ensured that the voltage of the winding on the auxiliary battery 03 side is also relatively stable, avoiding the influence of the resonance inductance L0 on the voltage on the low-voltage side, reducing the voltage fluctuation range of the low-voltage side, thereby reducing Reduce the pressure of the downstream DCDC voltage regulator circuit.
  • the third transformer winding 40 can be used to connect the auxiliary battery 03, the current in the third transformer winding 40 is relatively small, so as shown in FIG. 10, the line of the first transformer winding 20
  • the width and the line width of the second transformer winding 30 may both be smaller than the line width of the third transformer winding 40. That is, the line width of the third transformer winding 40 can be wider and the resistance can be smaller, so that the voltage drop of the third transformer winding 40 can be effectively reduced.
  • the third transformer winding 40 may be flat, that is, the third transformer winding 40 may be a bent sheet structure, and the number of turns of the third transformer winding 40 may be equal to 1 or 2. .
  • the third transformer winding 40 may cover the surface of the second transformer winding 30, that is, the third transformer winding 40 may be wound on the side of the second transformer winding 30 away from the magnetic core 10.
  • the flat third transformer winding 40 may cover part of the surface of the second transformer winding 30, and the terminals of the second transformer winding 30 may not be covered by the third transformer winding 40 to facilitate connection with an external circuit.
  • the third transformer winding 40 has fewer turns and a wider line width, and the second transformer winding 30 has more turns and a narrower line width, the third transformer winding 40 is wound on the first
  • the second transformer winding 30 is far away from the magnetic core 10, that is, the third transformer winding 40 is wound on the outside of the second transformer winding 30, which can facilitate the winding of each winding and the connection of the subsequent circuit.
  • the magnetic core 10 may include: a first magnet 101 and a second magnet 102, and one or more of the first magnet 101 and the second magnet 102 are disposed on There is a groove, that is, a groove is formed on at least one of the two magnets 102.
  • the first magnet 101 and the second magnet 102 are arranged oppositely and surround the window 100.
  • the first magnet 101 and the second magnet 102 can be adhesively fixed.
  • a groove may be formed on the second magnet 102, that is, the second magnet 102 may be a U-shaped magnet. No groove is formed on the first magnet 101, and the first magnet 101 may be located on the side of the second magnet 102 where the groove is formed, so as to enclose the window 100 with the second magnet 102.
  • each transformer winding in the magnetic integrated device can be wound on the first magnet 101 and the second magnet 102 respectively.
  • the first transformer winding 20, the second transformer winding 30, and the third transformer winding 40 included in the magnetic integrated device are respectively wound on the first magnet 101 and the second magnet 102, and the second transformer winding The part 30 wound on each magnet is covered by the third transformer winding 40.
  • the number of winding turns on the first magnet 101 of each transformer winding in the magnetic integrated device and the number of winding turns on the second magnet 102 may be equal or similar, for example, each transformer winding is The difference between the number of turns on the two magnets may be smaller than the threshold of the number of turns, and the threshold of the number of turns may be 2 or 5, which is not limited in the embodiment of the present application.
  • the number of turns of each transformer winding may be the sum of the number of turns of the transformer winding on the two magnets.
  • the window 100 formed in the magnetic core 10 may be a rectangular window, that is, the shape of the orthographic projection of the window 100 on the plane where the opening is located may be a rectangle.
  • the window 100 may also be a circular window or other polygonal windows, and the shape of the window is not limited in the embodiment of the present application.
  • the structure of the first magnet 101 and the second magnet 102 can be flexibly set according to the situation.
  • any one of the first magnet 101 and the second magnet 102 may be an E-shaped magnet as shown in FIG. 13, or may be a U-shaped magnet as shown in FIG. 14, or may be as shown in FIG. 15.
  • the embodiment of the application does not limit the shape of each magnet.
  • the window 100 enclosed by the two magnets may be an irregular polygon.
  • the magnetic core 10 may also be an integral piece provided with a through slot.
  • the magnetic core 10 may be a cubic structure provided with through slots, that is, the magnetic core 10 may be a "mouth” structure.
  • the through groove is formed as a window 100.
  • the magnetic integrated device may further include a magnetic column 50.
  • the magnetic column 50 may be located in the window 100 and between the first transformer winding 20 and the second transformer winding 30.
  • One side of the magnetic column 50 is in contact with the magnetic core 10, and the other side has a gap with the magnetic core 10.
  • the gap is the first air gap 10 a between the first transformer winding 20 and the second transformer winding 30.
  • the magnetic column 50 may be located on a side of the first magnet 101 close to the second magnet 102 with a gap between it and the second magnet 102.
  • the magnetic column 50 may also be located on a side of the second magnet 102 close to the first magnet 101 with a gap between it and the first magnet 101.
  • the magnetic integrated device may include two magnetic columns 50, one of which is located on the side of the first magnet 101 close to the second magnet 102, and the other magnetic column 50 is located on the second magnet 102 close to the first magnet. One side of the magnet 101.
  • the magnetic column 50 may have a cubic structure.
  • the volume of the magnetic column 50 can be adjusted according to the requirement for the size of the resonant inductance in the power conversion circuit applied to the magnetic integrated device, and the gap between the magnetic column 50 and the magnetic core 10 (ie, the first air The size of the gap 10a) realizes the adjustment of the leakage inductance of the magnetic integrated device.
  • the leakage inductance of the magnetic integrated device is large.
  • the leakage inductance of the magnetic integrated device is small.
  • the magnetic column 50 and the magnetic core 10 may be an integral structure, that is, the two may be integrally formed.
  • the magnetic column 50 and the first magnet 101 may be a T-shaped integrated structure.
  • one or more second air gaps 10 b may be provided at one end of the magnetic core 10, and the second air gaps 10 b may communicate with the window 100.
  • the second air gap 10b may be arranged at one end of the magnetic core 10 close to the first transformer winding 20, or may also be arranged at one end of the magnetic core 10 close to the second transformer winding 30, or alternatively, both ends of the magnetic core 10 Both may be provided with a second air gap 10b.
  • a second air gap 10 b is opened at one end of the magnetic core 10 close to the first transformer winding 20.
  • the second air gap 10 b may be formed by the gap between the first magnet 101 and the second magnet 102.
  • the magnetic permeability of the magnetic core 10 can be reduced, and on the other hand, the magnetic saturation phenomenon under the AC large signal or DC bias can be avoided, which can better Control the inductance of the magnetic integrated device.
  • the embodiments of the present application provide a magnetic integrated device, in which two transformer windings can be wound separately, and a first air gap is formed at the separation. Since the magnetic lines of force can pass through the first air gap to form leakage inductance, the leakage inductance can be equivalent to the resonant inductance in the power conversion circuit, so there is no need to separately set inductance windings in the magnetic integrated device, which effectively reduces the volume of the magnetic integrated device And weight.
  • the power conversion circuit adopting the magnetic integrated device has a smaller volume and a higher power density, and the power conversion circuit has better intermodulation characteristics and higher voltage stabilization capabilities.
  • FIG. 16 is a circuit diagram of a power conversion circuit provided by an embodiment of the present application.
  • the power conversion circuit may include: the magnetic integrated device 001 provided in the foregoing embodiment, and the magnetic integrated device 001 may be a diagram 8.
  • the power conversion circuit may have at least two ports A and B, that is, the power conversion circuit may be at least a two-port power conversion circuit.
  • the first transformer winding 20 in the magnetic integrated device 001 can be connected to the first port A of the power conversion circuit
  • the second transformer winding 30 can be connected to the second port B of the power conversion circuit.
  • the first transformer winding 20 and the second transformer winding 30 can transfer energy to each other through electromagnetic mutual inductance, and realize power conversion.
  • the power conversion circuit may further include a third port C, and the magnetic integrated device 001 may further include a third transformer winding 40.
  • the third transformer winding 40 can be connected to the third port C.
  • the third transformer winding 40 and the first transformer winding 20 can transfer energy to each other through electromagnetic mutual inductance, and realize power conversion.
  • the third transformer winding 40 and the second transformer winding 30 can also transfer energy to each other through electromagnetic mutual inductance, and realize power conversion.
  • the power conversion circuit may further include three chopper circuits 002.
  • each chopper sub-circuit 002 can be connected to a port and a transformer winding in the magnetic integrated device 001 respectively. That is, each transformer winding can be connected to a port of the power conversion circuit through a chopper circuit 002.
  • the first port A of the power conversion circuit is used to connect the power battery
  • the second port B is used to connect to the DC bus
  • the third port C is used to connect to the auxiliary battery.
  • the chopper sub-circuit 002 connected between the first port A and the first transformer winding 20, and the chopper sub-circuit 002 connected between the second port B and the second transformer winding 30 may be bridge rectifier circuits
  • the bridge rectifier circuit may include four bridge-connected switching devices.
  • the chopper circuit 002 connected between the third port C and the third transformer winding 40 may be a double half-wave rectifier circuit including two switching devices, or may also be a bridge rectifier circuit.
  • the switching device included in the chopper circuit 002 may be a metal oxide semiconductor field effect transistor (MOSFET), an insulated gate bipolar transistor (IGBT) or a gallium nitride (GaN)-based High Electron Mobility Transistor (HEMT), etc.
  • MOSFET may be a silicon carbide (SiC) MOSFET.
  • the power conversion circuit may further include three filter capacitors C0.
  • Each filter capacitor C0 can be connected in parallel to the input end of a chopper circuit 002.
  • the power conversion circuit may further include a resonance element, and the resonance element may be connected to the magnetic integrated device 001 to form a resonance circuit. That is, the power conversion circuit may be a resonant or quasi-resonant power conversion circuit.
  • the resonance element may include a capacitor C1, and the capacitor C1 may be connected in series with the first transformer winding 20 or the second transformer winding 30 in the magnetic integrated device 001.
  • the capacitor C1 is connected in series with the second transformer winding 30.
  • the power conversion circuit adopting this structure can be called LLC resonant power conversion circuit, and can also be called series-parallel resonant power conversion circuit.
  • L represents inductance and C represents capacitance.
  • the resonance element may include: a first capacitor C2 and a second capacitor C3.
  • the first capacitor C2 can be connected in series with the first transformer winding 20 in the magnetic integrated device 001
  • the second capacitor C3 can be connected in series with the second transformer winding 30 in the magnetic integrated device 001.
  • the power conversion circuit adopting this structure can also be referred to as a CLLC resonant power conversion circuit.
  • the resonant element may include: a capacitor C4 and an inductor L1.
  • the capacitor C4 may be connected in series with the first transformer winding 20 or the second transformer winding 30 in the magnetic integrated device 001, and the inductor L1 may be connected in parallel with the first transformer winding 20 or the second transformer winding 30.
  • the capacitor C4 is connected in series with the second transformer winding 30, and the inductor L1 is connected in parallel with the second transformer winding 30.
  • the power conversion circuit using this structure can be called an L-LLC resonant power conversion circuit.
  • the power conversion circuit may also not require additional resonant elements.
  • the leakage inductance in the magnetic integrated device may be equivalent to two resonant inductors L0, and the two The resonant inductor L0 is connected in series with the first transformer winding 20 and the second transformer winding 30, respectively.
  • the power conversion circuit adopting this structure may also be called a dual active full bridge (DAB) power conversion circuit.
  • DAB dual active full bridge
  • the embodiment of the present application provides a power conversion circuit, because in the magnetic integrated device used in the power conversion circuit, two transformer windings can be wound separately, and the first air gap is formed at the separation.
  • the lines of magnetic force can pass through the first air gap to form leakage inductance, which can be equivalent to the resonant inductance in the power conversion circuit, so that there is no need to separately set inductance windings in the magnetic integrated device, which effectively reduces the volume and volume of the magnetic integrated device.
  • the weight so that the power conversion circuit adopting the magnetic integrated device has a smaller volume and a higher power density.
  • FIG. 20 is a circuit diagram of another power conversion circuit provided by an embodiment of the present application. As shown in FIG. 20, the power conversion circuit has three ports A, B, and C, that is, the power conversion circuit is a three-port power conversion Circuit.
  • the power conversion circuit may include: a resonance element 003, a first transformer T1, and a second transformer T2.
  • the primary side of the first transformer T1 can be connected in series with the resonant element 003, and the series connected first transformer T1 and the resonant element 003 can be connected to the second port B of the three ports.
  • the first transformer The secondary side of T1 can be connected to the first port A of the three ports.
  • the primary side of the second transformer T2 may be connected in parallel with the first transformer T1 and the resonant element 003 connected in series.
  • the resonant element 003 may be an inductor L2.
  • the primary side of the second transformer T2 is also connected to the second port B of the three ports, and the secondary side of the second transformer T2 can be connected to the third port C of the three ports.
  • the effect of the resonant element 003 on the output voltage of the secondary side of the second transformer T2 can be avoided, thereby ensuring The fluctuation range of the output voltage of the secondary side of the second transformer T2 is small, and the stability of the output voltage is high, thereby reducing the pressure of the subsequent circuit.
  • discrete devices may also be used to implement the above-mentioned power conversion circuit topology using magnetic integrated devices.
  • the second port B of the power conversion circuit may be used to connect to a DC bus
  • the first port A may be used to connect a power battery
  • the third port C may be used to connect an auxiliary battery.
  • the power conversion circuit may also include other resonant elements, for example, an inductor and a capacitor, etc., to realize the topology of the power conversion circuit shown in any one of FIGS. 16 to 19, This is not repeated in the embodiment of the application.
  • the embodiment of the present application also provides a charger.
  • the charger may include: an AC-DC conversion circuit 011 and a power conversion circuit 012.
  • the power conversion circuit 012 may be a circuit as shown in any one of FIGS. 16 to 20.
  • the second port B of the power conversion circuit 012 may be connected to the AC-DC conversion circuit 011, for example, may be connected to the AC-DC conversion circuit 011 through a DC bus.
  • the charger can be applied to an electric vehicle, or can also be applied to other electric drive devices, for example, can also be applied to a sweeping robot.
  • the electric vehicle may include a power battery 02, an auxiliary battery 03, and a charger 01.
  • the charger 01 can be connected to the power battery 02 and the auxiliary battery 03 respectively.
  • the first port A of the power conversion circuit 012 included in the charger 01 may be connected to the power battery 02
  • the third port C of the power conversion circuit 012 included in the charger 01 may be connected to the auxiliary battery 03.
  • the electric vehicle may be an electric car, an electric motorcycle, or an electric bicycle, etc., which is not limited in the embodiment of the present application.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Dc-Dc Converters (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

本申请提供了一种磁集成器件、功率变换电路、充电器及电动车辆，属于电力电子技术领域。该磁集成器件包括：磁芯、第一变压器绕组和第二变压器绕组，其中，该第一变压器绕组和该第二变压器绕组分隔绕制，且该分隔处形成第一气隙。由于磁力线可以穿过该第一气隙形成漏感，该漏感可以等效为功率变换电路中的谐振电感，从而无需在磁集成器件中单独设置电感绕组，有效减小了磁集成器件的体积和重量。并且，采用该磁集成器件的功率变换电路的体积也较小，功率密度较高。

Description

磁集成器件、功率变换电路、充电器及电动车辆
本申请要求于2019年8月14日提交的申请号为201910750681.6、发明名称为“磁集成器件、功率变换电路、充电器及电动车辆”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电力电子技术领域，特别涉及一种磁集成器件、功率变换电路、充电器及电动车辆。
背景技术
磁集成器件是一种集成有功率变换电路中多个分立器件(例如电感和变压器等)的器件。
磁集成器件包括磁芯、绕制在该磁芯上的电感绕组以及绕制在该磁芯上的变压器绕组。其中，变压器绕组通常包括直流母线侧绕组、高压绕组和低压绕组共三个绕组。
由于磁集成器件中的绕组较多，占用空间较大，导致磁集成器件的体积较大。
发明内容
本申请提供了一种磁集成器件、功率变换电路、充电器及电动车辆，可以解决相关技术中磁集成器件的体积较大的问题，技术方案如下：
一方面，提供了一种磁集成器件，包括：磁芯、第一变压器绕组和第二变压器绕组；
该磁芯上设置有窗口，该第一变压器绕组和该第二变压器绕组分别穿过该窗口绕制在该磁芯上；
其中，该第一变压器绕组和该第二变压器绕组分隔绕制，且该分隔处形成第一气隙。
由于磁力线可以穿过该第一气隙形成漏感，该漏感可以等效为功率变换电路中的谐振电感，从而无需在磁集成器件中单独设置电感绕组，有效减小了磁集成器件的体积和重量。并且，采用该磁集成器件的功率变换电路的体积也较小，功率密度较高。
可选的，该磁集成器件还可以包括第三变压器绕组，该第三变压器绕组穿过窗口绕制在磁芯上。相应的，该磁集成器件可以应用于三端口的功率变换电路中。
可选的，该第三变压器绕组和该第二变压器绕组层叠绕制。
该层叠绕制的绕制方式可以减少变压器绕组的占用空间，从而可以有效减小该磁集成器件的体积。并且，该绕制方式可以确保该第三变压器绕组和该第二变压器绕组之间紧密耦合。
可选的，该第三变压器绕组可以呈扁平状，且该第三变压器绕组可以覆盖该第二变压器绕组的表面。例如，可以覆盖该第二变压器绕组的部分表面，该第二变压器绕组的接线端未被第三变压器绕组覆盖，以便于与外部电路的连接。
可选的，该第一变压器绕组的匝数和该第二变压器绕组的匝数均大于该第三变压器绕组的匝数。
即该第三变压器绕组可以是用于连接电压较低的辅助电池的绕组。该第一变压器绕组和 该第二变压器绕组中的一个绕组可以用于连接直流母线，另一个则可以用于连接动力电池。
可选的，该第一变压器绕组的线宽和该第二变压器绕组的线宽均小于该第三变压器绕组的线宽。
将该第三变压器绕组的线宽设置的较宽，可以减小其电阻，从而有效降低该第三变压器绕组的电压降。
可选的，该磁集成器件还包括：位于该窗口内，且位于该第一变压器绕组和该第二变压器绕组之间的磁柱；
该磁柱的一侧与该磁芯接触，该磁柱的另一侧与该磁芯之间具有间隙。例如，该磁柱与该磁芯可以为一体结构。
通过调整该磁柱的体积，可以调节该磁柱与该磁芯之间的间隙的大小，进而实现对第一气隙的大小的调节，从而实现对该磁集成器件的漏感的调节。
可选的，该磁芯包括：第一磁体和第二磁体，该第一磁体和该第二磁体中的一个或多个磁体上形成有凹槽；该第一磁体和该第二磁体相对设置并围成该窗口。
例如，该第二磁体可以为形成有凹槽的U型磁体，该第一磁体上未形成凹槽。
可选的，该磁集成器件中的每个变压器绕组均可以分别绕制在该第一磁体和该第二磁体上。并且，每个变压器绕组在第一磁体上的绕制匝数与在第二磁体上的绕制匝数可以相等。由此，可以确保该磁集成器件整体结构的对称性。
可选的，该磁芯还可以为设置有通槽的一体件，该通槽即形成为该窗口。
可选的，该磁芯的一端设置有一个或多个第二气隙，该第二气隙与该窗口连通。
通过在磁芯上开设第二气隙，一方面可以减小磁芯的减小磁导率，另一方面可以避免在交流大信号或直流偏置下的磁饱和现象，更好地控制磁集成器件的电感量。
可选的，该窗口可以为矩形窗口。
另一方面，提供了一种功率变换电路，该功率变换电路可以包括：如上述方面提供的磁集成器件；
该磁集成器件中，第一变压器绕组与可以与该功率变换电路的第一端口连接，第二变压器绕组可以与该功率变换电路的第二端口连接，且该第一变压器绕组和该第二变压器绕组能够通过电磁互感来相互传递能量。
可选的，该功率变换电路还可以包括：穿过窗口绕制在磁芯上的第三变压器绕组；
该第三变压器绕组与该功率变换电路的第三端口连接，该第三变压器绕组和该第一变压器绕组能够通过电磁互感来相互传递能量，该第三变压器绕组和该第二变压器绕组能够通过电磁互感来相互传递能量。
可选的，该功率变换电路还可以包括：三个斩波子电路；第一变压器绕组、第二变压器绕组和第三变压器绕组中的每个变压器绕组通过一个斩波子电路与一个端口连接。其中，该斩波子电路可以为桥式整流电路。
可选的，该功率变换电路还可以包括：谐振元件，该谐振元件与该磁集成器件中的第一变压器绕组和第二变压器绕组中的一个或多个变压器绕组连接。即该功率变换电路可以为谐振或准谐振的功率变换电路。
可选的，该谐振元件可以包括：电容；该电容可以与该磁集成器件中的第一变压器绕组或第二变压器绕组串联。
可选的，该谐振元件可以包括：第一电容和第二电容；该第一电容与该磁集成器件中的第一变压器绕组串联，该第二电容与该磁集成器件中的第二变压器绕组串联。
可选的，该谐振元件可以包括：电容和电感；该电容与该磁集成器件中的第一变压器绕组或第二变压器绕组串联；该电感与该第一变压器绕组或该第二变压器绕组并联。
又一方面，提供了一种功率变换电路，该功率变换电路具有三个端口，该功率变换电路包括：谐振元件、第一变压器和第二变压器；
该第一变压器的原边与该谐振元件串联，该第一变压器的副边与该三个端口中的第一端口连接；该第二变压器的原边与串联后的该第一变压器和该谐振元件并联，且与该三个端口中的第二端口连接，该第二变压器的副边与该三个端口中的第三端口连接。
由于该第一变压器和该谐振元件串联后，再与该第二变压器的原边并联，由此可以避免该谐振元件对该第二变压器的副边的输出电压的影响，确保该第二变压器的副边的输出电压的波动范围较小，输出电压的稳定性较高，减小了后级电路的调压压力。
再一方面，提供了一种充电器，包括：交流直流转换电，路以及如上述方面提供的功率变换电路，该功率变换电路的第二端口与该交流直流转换电路连接。
再一方面，提供了一种电动车辆，包括：动力电池、辅助电池以及如上述方面提供的充电器；该充电器中功率变换电路的第一端口与该动力电池连接，第三端口与该辅助电池连接。
综上所述，本申请实施例提供了一种磁集成器件、功率变换电路、充电器及电动车辆，该磁集成器件中的两个变压器绕组可以分隔绕制，且该分隔处形成第一气隙。由于磁力线可以穿过该第一气隙形成漏感，该漏感可以等效为功率变换电路中的谐振电感，从而无需在磁集成器件中单独设置电感绕组，有效减小了磁集成器件的体积和重量。并且，采用该磁集成器件的功率变换电路的体积也较小，功率密度较高。
附图说明
图1是本申请实施例提供的一种充电器的结构示意图；
图2是本申请实施例提供的一种充电器的充电方式示意图；
图3是本申请实施例提供的另一种充电器的充电方式示意图；
图4是本申请实施例提供的又一种充电器的充电方式示意图；
图5是本申请实施例提供的再一种充电器的充电方式示意图；
图6是本申请实施例提供的再一种充电器的充电方式示意图；
图7是本申请实施例提供的再一种充电器的充电方式示意图；
图8是本申请实施例提供的一种磁集成器件的结构示意图；
图9是本申请实施例提供的一种磁集成器件的等效电路图；
图10是本申请实施例提供的另一种磁集成器件的结构示意图；
图11是本申请实施例提供的另一种磁集成器件的等效电路图；
图12是本申请实施例提供的又一种磁集成器件的结构示意图；
图13是本申请实施例提供的一种磁体的结构示意图；
图14是本申请实施例提供的另一种磁体的结构示意图；
图15是本申请实施例提供的又一种磁体的结构示意图；
图16是本申请实施例提供的一种功率变换电路的电路图；
图17是本申请实施例提供的另一种功率变换电路的电路图；
图18是本申请实施例提供的又一种功率变换电路的电路图；
图19是本申请实施例提供的再一种功率变换电路的电路图；
图20是本申请实施例提供的再一种功率变换电路的电路图。
具体实施方式
下面结合附图详细介绍本申请实施例提供的磁集成器件。
图1是本申请实施例提供的一种充电器的结构示意图，如图1所示，该充电器01可以包括交流直流(alternating current/direct current，AC/DC)转换电路011，以及功率变换电路012，该功率变换电路012也可以称为DCDC功率变换器。其中，该AC/DC的一端可以与交流电源连接，另一端可以与直流母线连接，该直流母线与该功率变换电路012连接。
为了提升功率密度，如图1所示，充电器01中所采用的DCDC功率变换器012可以为三端口的DCDC功率变换器。该DCDC功率变换器012的三个端口可以分别用于连接直流母线、动力电池02和辅助电池03，且该DCDC功率变换器012能够实现任意两个端口之间的功率转换。其中，动力电池02可以用于为电力驱动设备的驱动电机供电，其电压较高，一般为300伏特(V)至600V，因此动力电池02也可以称为高压电池。辅助电池03可以用于为电力驱动设备中的其他用电设备(例如电动车辆的电子刹车系统、仪表盘和灯光控制系统等)供电，其电压较低，一般为12V至15V，因此辅助电池03也可以称为低压电池。
由于该DCDC功率变换器012能够实现任意两个端口之间的功率转换，因此如图2所示，集成有该DCDC功率变换器012的充电器01可以实现交流电源与动力电池02之间的双向供电。或者，如图3所示，该充电器01可以实现交流电源与辅助电池03之间的双向供电。或者，如图4所示，该充电器01可以实现动力电池02与辅助电池03之间的双向供电。或者，如图5所示，该充电器01可以实现交流电源同时为动力电池02和辅助电池03供电。或者，如图6所示，该充电器01可以实现辅助电池03同时为交流电源和动力电池02供电。又或者，如图7所示，该充电器01可以实现动力电池02同时为交流电源和辅助电池03供电。
在本申请实施例中，为了提升该DCDC功率变换器012的功率变换效率和功率密度，该DCDC功率变换器012可以采用谐振或者准谐振的三端口DCDC功率变换器。并且，为了进一步减小器件体积、提升功率密度、改善功率变换器的交调特性以及提高功率变换器的稳压能力，该谐振或者准谐振的三端口DCDC功率变换器中的谐振电感和变压器可以采用磁集成器件实现。
可选的，本申请实施例提供的充电器01可以为应用于电动车辆中的车载充电器(on board charger，OBC)。或者，该充电器01还可以应用于其他电力驱动设备中，例如还可以应用于扫地机器人中。
图8是本申请实施例提供的一种磁集成器件的结构示意图，该磁集成器件可以应用于功率变换电路中，例如可以应用于图1至图7中任一附图所示的功率变换电路012中。参考图8，该磁集成器件可以包括：磁芯10、第一变压器绕组20和第二变压器绕组30。
该磁芯10上设置有窗口100，该第一变压器绕组20和该第二变压器绕组30可以分别穿过该窗口100绕制在该磁芯10上。例如，如图1所示，该窗口100可以为开设在磁芯10上 的通槽。
该第一变压器绕组20和该第二变压器绕组30可以分隔绕制在磁芯10上，且该分隔处可以形成第一气隙10a。
该第一变压器绕组20产生的磁力线，以及该第二变压器绕组30产生的磁力线可以穿过该第一气隙10a形成漏感，该漏感可以等效为功率变换电路中的谐振电感。因此，该磁集成器件中无需单独设置电感绕组，有效减小了磁集成器件的体积和重量。
示例的，图9是本申请实施例提供的一种磁集成器件的等效电路图，参考图9可以看出，该第一变压器绕组20和第二变压器绕组30可以等效为一个两端口的功率变换器。并且，第一变压器绕组20和第二变压器绕组30之间的第一气隙10a形成的漏感可以等效为与该第二变压器绕组30串联的谐振电感L0。
综上所述，本申请实施例提供了一种磁集成器件，该磁集成器件中的两个变压器绕组可以分隔绕制，且该分隔处形成第一气隙。由于磁力线可以穿过该第一气隙形成漏感，该漏感可以等效为功率变换电路中的谐振电感，从而无需在磁集成器件中单独设置电感绕组，有效减小了磁集成器件的体积和重量。并且，采用该磁集成器件的功率变换电路的体积也较小，功率密度较高。
可选的，图10是本申请实施例提供的另一种磁集成器件的结构示意图，如图10所示，该磁集成器件还可以包括：第三变压器绕组40。该第三变压器绕组40可以穿过该窗口100绕制在该磁芯10上。
相应的，该第一变压器绕组20、第二变压器绕组30以及第三变压器绕组40可以等效为一个三端口的功率变换器。
可选的，如图10所示，该第三变压器绕组40和该第二变压器绕组30可以层叠绕制。即该第三变压器绕组40和该第二变压器绕组30可以采用同芯方式绕制。该层叠绕制的绕制方式可以减少变压器绕组的占用空间，从而可以有效减小该磁集成器件的体积。
图11是本申请实施例提供的一种第二变压器绕组和第三变压器绕组层叠绕制时，磁集成器件的等效电路图，参考图11可以看出，该绕制方式可以确保该第三变压器绕组40和该第二变压器绕组30之间紧密耦合，两者之间没有漏感或者仅有较小的漏感，从而可以有效减少两者之间功率传输的损耗，进而提高两者之间的功率传输效率。
当然，该第三变压器绕组40也可以与该第二变压器绕组30或者第一变压器绕组20分隔绕制。例如，该第一变压器绕组20、第二变压器绕组30和第三变压器绕组40可以依次分隔绕制在磁芯10上。本申请实施例对该第三变压器绕组40的绕制位置不做限定。
在本申请实施例中，该第一变压器绕组20和该第二变压器绕组30中的一个绕组可以是用于连接直流母线的绕组，另一个绕组可以是用于连接动力电池02或者辅助电池03的绕组。
图12是本申请实施例提供的又一种磁集成器件的结构示意图，结合图8，图10和图12可以看出，该第一变压器绕组20的匝数和该第二变压器绕组30的匝数可以均大于该第三变压器绕组40的匝数。即该第三变压器绕组40可以是用于连接电压较低的辅助电池03的绕组。
可选的，该第一变压器绕组20可以用于连接动力电池02，该第二变压器绕组30可以用于连接直流母线。结合图11可以看出，当第三变压器绕组40和该第二变压器绕组30层叠绕制时，可以使得该第三变压器绕组40(即辅助电池03侧的绕组)跳过谐振电感L0直接与直流母线耦合。
由于直流母线的电压较为稳定，因此可以确保该辅助电池03侧的绕组的电压也较为稳定，避免了谐振电感L0对低压侧的电压的影响，减小了该低压侧的电压波动范围，从而减小了后级DCDC稳压电路的调压压力。
在本申请实施例中，由于该第三变压器绕组40可以用于连接辅助电池03，该第三变压器绕组40中的电流相对较小，因此如图10所示，该第一变压器绕组20的线宽和该第二变压器绕组30的线宽可以均小于该第三变压器绕组40的线宽。即该第三变压器绕组40的线宽可以较宽，电阻可以较小，从而可以有效降低该第三变压器绕组40的电压降。
示例的，继续参考图10，该第三变压器绕组40可以呈扁平状，即该第三变压器绕组40可以为弯折的片状结构，且该第三变压器绕组40的匝数可以等于1或2。该第三变压器绕组40可以覆盖第二变压器绕组30的表面，即该第三变压器绕组40可以绕制在该第二变压器绕组30远离磁芯10的一侧。例如，该扁平状的第三变压器绕组40可以覆盖第二变压器绕组30的部分表面，第二变压器绕组30的接线端可以未被该第三变压器绕组40覆盖，以便于与外部电路连接。
由于该第三变压器绕组40的匝数较少，且线宽较宽，而第二变压器绕组30的匝数较多，且线宽较窄，因此将该第三变压器绕组40绕制在该第二变压器绕组30远离磁芯10的一侧，即将该第三变压器绕组40绕制在该第二变压器绕组30外侧，可以便于各个绕组的绕制以及后级电路的连接。
可选的，如图10和图12所示，该磁芯10可以包括：第一磁体101和第二磁体102，该第一磁体101和该第二磁体102中的一个或多个磁体上设置有凹槽，即两个磁体102中的至少一个磁体上形成有凹槽。该第一磁体101和该第二磁体102相对设置并围成该窗口100。并且，该第一磁体101和该第二磁体102可以粘接固定。
示例的，参考图10和图12可以看出，该第二磁体102上可以形成有一个凹槽，即该第二磁体102可以为U型磁体。该第一磁体101上未形成凹槽，并且，该第一磁体101可以位于第二磁体102形成有凹槽的一侧，从而与该第二磁体102围成该窗口100。
在本申请实施例中，从图10和图12中可以看出，该磁集成器件中的每个变压器绕组均可以分别绕制在该第一磁体101和第二磁体102上。例如，参考图12，该磁集成器件包括的第一变压器绕组20、第二变压器绕组30和第三变压器绕组40均分别绕制在第一磁体101和第二磁体102上，且第二变压器绕组30绕制在每个磁体上的部分均被该第三变压器绕组40覆盖。
可选的，该磁集成器件中的每个变压器绕组在该第一磁体101上的绕制匝数与在该第二磁体102上的绕制匝数可以相等或相近，例如每个变压器绕组在两个磁体上的绕制匝数的差值可以小于匝数阈值，该匝数阈值可以为2或者5，本申请实施例对此不做限定。
通过使得每个变压器绕组在两个磁体上的绕制匝数相等或者相近，可以确保该磁集成器件整体结构的对称性。
需要说明的是，在本申请实施例中，每个变压器绕组的匝数可以为该变压器绕组在两个磁体上的绕制匝数之和。
可选的，如图8、图10和图12所示，该磁芯10中形成的窗口100可以为矩形窗口，即该窗口100在其开口所在平面的正投影的形状可以为矩形。当然，该窗口100还可以为圆形窗口或其他多边形窗口，本申请实施例对该窗口的形状不做限定。
需要说明的是，在本申请实施例中，该第一磁体101和第二磁体102的结构可以根据情况灵活设置。例如，该第一磁体101和第二磁体102中的任一磁体可以为如图13所示的E型磁体，或者可以为如图14所示的U型磁体，又或者可以为如图15所示的PQ型磁体，本申请实施例对每个磁体的形状不做限定。其中，当第一磁体101和第二磁体102中的任一磁体为E型磁体或者PQ型磁体时，该两个磁体围成的窗口100可以为不规则的多边形。
还需要说明的是，在本申请实施例中，该磁芯10还可以为一个设置有通槽的一体件。例如，参考图8，该磁芯10可以为设置有通槽的立方体结构，即该磁芯10可以为“口”字型结构。该通槽即形成为窗口100。
可选的，参考图10和图12，该磁集成器件还可以包括：磁柱50。该磁柱50可以位于窗口100内，且位于第一变压器绕组20和第二变压器绕组30之间。该磁柱50的一侧与该磁芯10接触，另一侧与该磁芯10之间具有间隙。间隙即为第一变压器绕组20和第二变压器绕组30之间的第一气隙10a。
示例的，如图10和12所示，该磁柱50可以位于该第一磁体101靠近该第二磁体102的一侧，且与该第二磁体102之间具有间隙。
或者，该磁柱50也可以位于该第二磁体102靠近该第一磁体101的一侧，且与该第一磁体101之间具有间隙。
又或者，该磁集成器件可以包括两个磁柱50，其中一个磁柱50位于该第一磁体101靠近该第二磁体102的一侧，另一个磁柱50位于该第二磁体102靠近该第一磁体101的一侧。并且，该两个磁柱50之间具有间隙，以确保第一变压器绕组20和第二变压器绕组30之间可以形成第一气隙10a。
在本申请实施例中，该磁柱50可以为立方体结构。并且，可以通过该磁集成器件所应用的功率变换电路中对谐振电感的大小的需求，调整该磁柱50的体积，进而调节该磁柱50与磁芯10之间的间隙(即第一气隙10a)的大小，从而实现对该磁集成器件的漏感的调节。
示例的，当该磁柱50的体积较小，磁柱50与磁芯10之间的间隙较大时，该磁集成器件的漏感较大。当该磁柱50的体积较大，磁柱50与磁芯10之间的间隙较小时，该磁集成器件的漏感较小。
可选的，该磁柱50与该磁芯10可以为一体结构，即两者可以一体成型。例如，如图10和图12所示，该磁柱50与该第一磁体101可以为T型的一体结构。
在本申请实施例中，如图10和图12所示，该磁芯10的一端还可以设置有一个或多个第二气隙10b，该第二气隙10b可以与该窗口100连通。
其中，该第二气隙10b可以设置在磁芯10靠近第一变压器绕组20的一端，或者也可以设置在磁芯10靠近第二变压器绕组30的一端，又或者，该磁芯10的两端可以均设置有第二气隙10b。
示例的，在图10和图12所示的磁集成器件中，磁芯10靠近第一变压器绕组20的一端开设有一个第二气隙10b。该第二气隙10b可以由第一磁体101与第二磁体102之间的间隙形成。
通过在磁芯10上开设第二气隙10b，一方面可以减小磁芯10的磁导率，另一方面可以避免在交流大信号或直流偏置下的磁饱和现象，从而能够更好地控制磁集成器件的电感量。
综上所述，本申请实施例提供了一种磁集成器件，该磁集成器件中的两个变压器绕组可 以分隔绕制，且分隔处形成第一气隙。由于磁力线可以穿过该第一气隙形成漏感，该漏感可以等效为功率变换电路中的谐振电感，从而无需在磁集成器件中单独设置电感绕组，有效减小了磁集成器件的体积和重量。并且，采用该磁集成器件的功率变换电路的体积也较小，功率密度较高，且该功率变换电路的交调特性较好，稳压能力较高。
图16是本申请实施例提供的一种功率变换电路的电路图，如图16所示，该功率变换电路可以包括：如上述实施例所提供的磁集成器件001，该磁集成器件001可以为图8、图10或图12所示的磁集成器件。参考图16，该功率变换电路至少可以具有A和B两个端口，即该功率变换电路至少可以为两端口的功率变换电路。该磁集成器件001中第一变压器绕组20可以与该功率变换电路的第一端口A连接，第二变压器绕组30与可以与该功率变换电路的第二端口B连接。并且，该第一变压器绕组20和第二变压器绕组30能够通过电磁互感来相互传递能量，并实现功率变换。
可选的，参考图16，该功率变换电路还可以包括第三端口C，该磁集成器件001还可以包括第三变压器绕组40。该第三变压器绕组40与可以与该第三端口C连接。
并且，该第三变压器绕组40与该第一变压器绕组20能够通过电磁互感来相互传递能量，并实现功率变换。该第三变压器绕组40与该第二变压器绕组30也能够通过电磁互感来相互传递能量，并实现功率变换。
可选的，如图16所示，该功率变换电路还可以包括三个斩波子电路002。其中，每个斩波子电路002可以分别与一个端口以及磁集成器件001中的一个变压器绕组连接。也即是，每个变压器绕组可以通过一个斩波子电路002与该功率变换电路的一个端口连接。
示例的，参考图16，假设该功率变换电路的第一端口A用于连接动力电池，第二端口B用于连接直流母线，第三端口C用于连接辅助电池。则连接在第一端口A和该第一变压器绕组20之间的斩波子电路002，以及连接在第二端口B和第二变压器绕组30之间的斩波子电路002均可以为桥式整流电路，该桥式整流电路可以包括四个桥式连接的开关器件。连接在该第三端口C和该第三变压器绕组40之间的斩波子电路002可以为包括两个开关器件的双半波整流电路，或者也可以为桥式整流电路。
其中，该斩波子电路002中包括的开关器件可以是金属氧化物半导体场效应晶体管(metal oxide semiconductor field effect transistor，MOSFET)、绝缘栅双极型晶体管(insulated gate bipolar transistor，IGBT)或者氮化镓(GaN)基高电子迁移率晶体管(High Electron Mobility Transistor，HEMT)等，该MOSFET可以为碳化硅(SiC)MOSFET等。
可选的，继续参考图16，该功率变换电路还可以包括三个滤波电容C0。每个滤波电容C0可以并联在一个斩波子电路002的输入端。
在本申请实施例中，该功率变换电路还可以包括：谐振元件，该谐振元件可以与该磁集成器件001连接，构成谐振电路。也即是，该功率变换电路可以为谐振或者准谐振的功率变换电路。
作为一种可选的实现方式，如图17所示，该谐振元件可以包括：电容C1，该电容C1可以与该磁集成器件001中的第一变压器绕组20或者第二变压器绕组30串联。例如，在图17所示的电路图中，该电容C1与该第二变压器绕组30串联。
采用该结构的功率变换电路可以称为LLC谐振功率变换电路，也可以称为串并联谐振功 率变换电路。其中，L表示电感，C表示电容。
作为另一种可选的实现方式，如图18所示，该谐振元件可以包括：第一电容C2和第二电容C3。其中，该第一电容C2可以与该磁集成器件001中的第一变压器绕组20串联，该第二电容C3可以与该磁集成器件001中的第二变压器绕组30串联。
采用该结构的功率变换电路也可以称为CLLC谐振功率变换电路。
作为再一种可选的实现方式，如图19所示，该谐振元件可以包括：电容C4和电感L1。该电容C4可以与该磁集成器件001中的第一变压器绕组20或第二变压器绕组30串联，该电感L1可以与该第一变压器绕组20或该第二变压器绕组30并联。例如，在图19所示的结构中，电容C4与第二变压器绕组30串联，该电感L1与该第二变压器绕组30并联。
采用该结构的功率变换电路可以称为L-LLC谐振功率变换电路。
作为又一种可选的实现方式，如图16所示，该功率变换电路中也可以无需额外设置谐振元件，该磁集成器件中的漏感可以等效为两个谐振电感L0，该两个谐振电感L0分别与第一变压器绕组20和第二变压器绕组30串联。采用该结构的功率变换电路也可以称为双有源全桥(dual active bridge，DAB)功率变换电路。
综上所述，本申请实施例提供了一种功率变换电路，由于该功率变换电路采用的磁集成器件中，两个变压器绕组可以分隔绕制，且该分隔处形成第一气隙。磁力线可以穿过该第一气隙形成漏感，该漏感可以等效为功率变换电路中的谐振电感，从而无需在磁集成器件中单独设置电感绕组，有效减小了磁集成器件的体积和重量，从而使得采用该磁集成器件的功率变换电路的体积也较小，功率密度较高。
图20是本申请实施例提供的再一种功率变换电路的电路图，如图20所示，该功率变换电路具有A、B和C共三个端口，即该功率变换电路为三端口的功率变换电路。该功率变换电路可以包括：谐振元件003、第一变压器T1和第二变压器T2。
其中，该第一变压器T1的原边可以与该谐振元件003串联，且串联后的该第一变压器T1和该谐振元件003可以与该三个端口中的第二端口B连接，该第一变压器T1的副边可以与三个端口中的第一端口A连接。
该第二变压器T2的原边可以与串联后的该第一变压器T1和该谐振元件003并联。示例的，在图20所示的结构中，该谐振元件003可以为电感L2。并且，该第二变压器T2的原边还与三个端口中的第二端口B连接，该第二变压器T2的副边可以与三个端口中的第三端口C连接。
由于该第一变压器T1和该谐振元件003串联后，再与该第二变压器T2的原边并联，由此可以避免该谐振元件003对该第二变压器T2的副边的输出电压的影响，确保该第二变压器T2的副边的输出电压的波动范围较小，输出电压的稳定性较高，进而减小了后级电路的调压压力。
根据上述分析可知，在本申请实施例中，还可以采用分立器件实现上述采用磁集成器件的功率变换电路的拓扑。
可选的，在本申请实施例中，该功率变换电路的第二端口B可以用于连接直流母线，第一端口A可以用于连接动力电池，第三端口C可以用于连接辅助电池。
需要说明的是，除了谐振元件003之外，该功率变换电路还可以包括其他谐振元件，例 如还可以包括电感和电容等，以实现图16至图19任一所示的功率变换电路的拓扑，本申请实施例对此不再赘述。
本申请实施例还提供了一种充电器，如图1至图7所示，该充电器可以包括：交流直流转换电路011，以及功率变换电路012。该功率变换电路012可以为如图16至图20任一所示的电路。该功率变换电路012的第二端口B可以与该交流直流转换电路011连接，例如可以通过直流母线与该交流直流转换电路011连接。
可选的，该充电器可以应用于电动车辆中，或者还可以应用于其他电力驱动设备中，例如还可以应用于扫地机器人中。
本申请实施例还提供了一种电动车辆，参考图1至图7，该电动车辆可以包括：动力电池02、辅助电池03以及充电器01。该充电器01可以分别与该动力电池02和该辅助电池03连接。例如，该充电器01所包括的功率变换电路012的第一端口A可以与该动力电池02连接，该充电器01所包括的功率变换电路012的第三端口C可以与该辅助电池03连接。
可选的，该电动车辆可以为电动汽车、电动摩托车或者电动自行车等，本申请实施例对此不做限定。
以上所述仅为本申请的可选实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (25)

  1. 一种磁集成器件，其特征在于，包括：磁芯、第一变压器绕组和第二变压器绕组；
    所述磁芯上设置有窗口，所述第一变压器绕组和所述第二变压器绕组分别穿过所述窗口绕制在所述磁芯上；
    其中，所述第一变压器绕组和所述第二变压器绕组分隔绕制，分隔处形成第一气隙。
  2. 根据权利要求1所述的磁集成器件，其特征在于，还包括：第三变压器绕组，所述第三变压器绕组穿过所述窗口绕制在所述磁芯上。
  3. 根据权利要求2所述的磁集成器件，其特征在于，所述第三变压器绕组和所述第二变压器绕组层叠绕制。
  4. 根据权利要求3所述的磁集成器件，其特征在于，所述第三变压器绕组呈扁平状，且所述第三变压器绕组覆盖所述第二变压器绕组的表面。
  5. 根据权利要求4所述的磁集成器件，其特征在于，所述第三变压器绕组覆盖所述第二变压器绕组的部分表面，所述第二变压器绕组的接线端未被所述第三变压器绕组覆盖。
  6. 根据权利要求2至5任一所述的磁集成器件，其特征在于，所述第一变压器绕组的匝数和所述第二变压器绕组的匝数均大于所述第三变压器绕组的匝数。
  7. 根据权利要求6所述的磁集成器件，其特征在于，所述第一变压器绕组的线宽和所述第二变压器绕组的线宽均小于所述第三变压器绕组的线宽。
  8. 根据权利要求1至7任一所述的磁集成器件，其特征在于，所述磁集成器件还包括：位于所述窗口内，且位于所述第一变压器绕组和所述第二变压器绕组之间的磁柱；
    所述磁柱的一侧与所述磁芯接触，所述磁柱的另一侧与所述磁芯之间具有间隙。
  9. 根据权利要求8所述的磁集成器件，其特征在于，所述磁柱与所述磁芯为一体结构。
  10. 根据权利要求1至9任一所述的磁集成器件，其特征在于，所述磁芯包括：第一磁体和第二磁体，所述第一磁体和所述第二磁体中的一个或多个磁体上形成有凹槽；
    所述第一磁体和所述第二磁体相对设置并围成所述窗口。
  11. 根据权利要求10所述的磁集成器件，其特征在于，所述磁集成器件中的每个变压器绕组均分别绕制在所述第一磁体和所述第二磁体上。
  12. 根据权利要求11所述的磁集成器件，其特征在于，每个变压器绕组在所述第一磁体上的绕制匝数与在所述第二磁体上的绕制匝数相等。
  13. 根据权利要求1至9任一所述的磁集成器件，其特征在于，所述磁芯为设置有通槽的一体件，所述通槽形成为所述窗口。
  14. 根据权利要求1至13任一所述的磁集成器件，其特征在于，所述磁芯的一端设置有一个或多个第二气隙，所述第二气隙与所述窗口连通。
  15. 根据权利要求1至14任一所述的磁集成器件，其特征在于，所述窗口为矩形窗口。
  16. 一种功率变换电路，其特征在于，所述功率变换电路包括：磁芯、第一变压器绕组和第二变压器绕组；
    所述磁芯上设置有窗口，所述第一变压器绕组、所述第二变压器绕组和所述第三变压器绕组分别穿过所述窗口绕制在所述磁芯上，且所述第一变压器绕组和所述第二变压器绕组分隔绕制，分隔处形成第一气隙；
    其中，所述第一变压器绕组与所述功率变换电路的第一端口连接，所述第二变压器绕组与所述功率变换电路的第二端口连接，且所述第一变压器绕组和所述第二变压器绕组能够通过电磁互感来相互传递能量。
  17. 根据权利要求16所述的功率变换电路，其特征在于，还包括：穿过所述窗口绕制在所述磁芯上的第三变压器绕组；
    所述第三变压器绕组与所述功率变换电路的第三端口连接，所述第三变压器绕组和所述第一变压器绕组能够通过电磁互感来相互传递能量，且所述第三变压器绕组和所述第二变压器绕组能够通过电磁互感来相互传递能量。
  18. 根据权利要求17所述的功率变换电路，其特征在于，还包括：三个斩波子电路；
    所述第一变压器绕组、所述第二变压器绕组和所述第三变压器绕组中的每个变压器绕组通过一个所述斩波子电路与一个端口连接。
  19. 根据权利要求16至18任一所述的功率变换电路，其特征在于，还包括：谐振元件，所述谐振元件与所述第一变压器绕组和所述第二变压器绕组中的一个或多个变压器绕组连接。
  20. 根据权利要求19所述的功率变换电路，其特征在于，所述谐振元件包括：电容；
    所述电容与所述第一变压器绕组或所述第二变压器绕组串联。
  21. 根据权利要求19所述的功率变换电路，其特征在于，所述谐振元件包括：第一电容和第二电容；
    所述第一电容与所述第一变压器绕组串联，所述第二电容与所述第二变压器绕组串联。
  22. 根据权利要求19所述的功率变换电路，其特征在于，所述谐振元件包括：电容和电感；
    所述电容与所述第一变压器绕组或所述第二变压器绕组串联；
    所述电感与所述第一变压器绕组或所述第二变压器绕组并联。
  23. 一种功率变换电路，其特征在于，所述功率变换电路具有三个端口，所述功率变换电路包括：谐振元件、第一变压器和第二变压器；
    所述第一变压器的原边与所述谐振元件串联，所述第一变压器的副边与所述三个端口中的第一端口连接；
    所述第二变压器的原边与串联后的所述第一变压器和所述谐振元件并联，且与所述三个端口中的第二端口连接，所述第二变压器的副边与所述三个端口中的第三端口连接。
  24. 一种充电器，其特征在于，包括：交流直流转换电路，以及与如权利要求16至23任一所述的功率变换电路，所述功率变换电路的第二端口与所述交流直流转换电路连接。
  25. 一种电动车辆，其特征在于，包括：动力电池、辅助电池以及如权利要求24所述的充电器；
    所述充电器中功率变换电路的第一端口与所述动力电池连接，所述功率变换电路的第三端口与所述辅助电池连接。
PCT/CN2020/089871 2019-08-14 2020-05-12 磁集成器件、功率变换电路、充电器及电动车辆 Ceased WO2021027348A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BR112021014228A BR112021014228A2 (pt) 2019-08-14 2020-05-12 Dispositivo magnético integrado, circuito de conversão de potência, carregador, e veículo elétrico
EP20852993.3A EP3923307B1 (en) 2019-08-14 2020-05-12 Magnetic integrated device, power conversion circuit, charger, and electric vehicle
US17/588,202 US11527354B2 (en) 2019-08-14 2022-01-28 Magnetic integrated device, power conversion circuit, charger, and electric vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910750681.6 2019-08-14
CN201910750681.6A CN110634655B (zh) 2019-08-14 2019-08-14 磁集成器件、功率变换电路、充电器及电动车辆

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/588,202 Continuation US11527354B2 (en) 2019-08-14 2022-01-28 Magnetic integrated device, power conversion circuit, charger, and electric vehicle

Publications (1)

Publication Number Publication Date
WO2021027348A1 true WO2021027348A1 (zh) 2021-02-18

Family

ID=68969871

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/089871 Ceased WO2021027348A1 (zh) 2019-08-14 2020-05-12 磁集成器件、功率变换电路、充电器及电动车辆

Country Status (5)

Country Link
US (1) US11527354B2 (zh)
EP (1) EP3923307B1 (zh)
CN (1) CN110634655B (zh)
BR (1) BR112021014228A2 (zh)
WO (1) WO2021027348A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210083589A1 (en) * 2019-09-12 2021-03-18 Delta Electronics (Shanghai) Co.,Ltd. Bidirectional isolated resonant converter

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109686538B (zh) * 2018-12-11 2020-07-28 华为技术有限公司 一种变压器以及电源
CN110634655B (zh) * 2019-08-14 2021-05-14 华为技术有限公司 磁集成器件、功率变换电路、充电器及电动车辆
CN111899976B (zh) * 2020-08-26 2024-06-25 福州大学 变压器漏感宽范围控制方法及结构
CN112600287B (zh) * 2020-10-16 2022-12-09 国网湖南省电力有限公司 具有气隙调节功能的阻抗匹式输电线路取能装置及其应用方法
CN113012908B (zh) * 2021-03-01 2022-03-29 杭州富特科技股份有限公司 集成磁元件以及基于电力设备的集成磁元件系统
CN112563000B (zh) * 2021-03-01 2021-05-07 杭州富特科技股份有限公司 集成磁元件装置以及变换器

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101355308A (zh) * 2008-08-29 2009-01-28 浙江大学 一种磁集成的零电压零电流软开关全桥电路
US20100067263A1 (en) * 2008-06-16 2010-03-18 Northeastern University Dual interleaved flyback converter for high input voltage
CN101720160A (zh) * 2009-09-15 2010-06-02 杨东平 一种冷阴极荧光灯驱动电路
CN103515066A (zh) * 2012-06-22 2014-01-15 Det国际控股有限公司 用于软开关转换器的集成磁性元件
CN108109821A (zh) * 2017-12-06 2018-06-01 深圳威迈斯电源有限公司 一种高集成磁元件
CN108736734A (zh) * 2018-07-10 2018-11-02 珠海英搏尔电气股份有限公司 一种谐振变换器
CN110040028A (zh) * 2019-04-15 2019-07-23 创驱（上海）新能源科技有限公司 一种车载充电机和dcdc转换装置的集成控制电路
CN110634655A (zh) * 2019-08-14 2019-12-31 华为技术有限公司 磁集成器件、功率变换电路、充电器及电动车辆

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0865904A (ja) * 1994-06-06 1996-03-08 Nippondenso Co Ltd 電気自動車用充電装置
FR2730849B1 (fr) * 1995-02-20 1997-05-09 Actia Transformateur, notamment pour convertisseur d'energie, et convertisseur d'energie a resonnance dote d'un tel transformateur
CN103595367B (zh) * 2013-11-07 2017-03-08 华为技术有限公司 一种磁集成器件及一种功率转换电路
CN105761880B (zh) * 2016-04-20 2017-12-29 华为技术有限公司 一种薄膜电感和电源转换电路
CN107633936A (zh) * 2017-08-30 2018-01-26 杭州富特科技股份有限公司 Llc变压器、及其实现方法及磁芯组件

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100067263A1 (en) * 2008-06-16 2010-03-18 Northeastern University Dual interleaved flyback converter for high input voltage
CN101355308A (zh) * 2008-08-29 2009-01-28 浙江大学 一种磁集成的零电压零电流软开关全桥电路
CN101720160A (zh) * 2009-09-15 2010-06-02 杨东平 一种冷阴极荧光灯驱动电路
CN103515066A (zh) * 2012-06-22 2014-01-15 Det国际控股有限公司 用于软开关转换器的集成磁性元件
CN108109821A (zh) * 2017-12-06 2018-06-01 深圳威迈斯电源有限公司 一种高集成磁元件
CN108736734A (zh) * 2018-07-10 2018-11-02 珠海英搏尔电气股份有限公司 一种谐振变换器
CN110040028A (zh) * 2019-04-15 2019-07-23 创驱（上海）新能源科技有限公司 一种车载充电机和dcdc转换装置的集成控制电路
CN110634655A (zh) * 2019-08-14 2019-12-31 华为技术有限公司 磁集成器件、功率变换电路、充电器及电动车辆

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3923307A4

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210083589A1 (en) * 2019-09-12 2021-03-18 Delta Electronics (Shanghai) Co.,Ltd. Bidirectional isolated resonant converter
US11626806B2 (en) * 2019-09-12 2023-04-11 Delta Electronics (Shanghai) Co., Ltd. Bidirectional isolated resonant converter with integrated resonant inductor and isolated transformer

Also Published As

Publication number Publication date
BR112021014228A2 (pt) 2022-04-19
US20220157516A1 (en) 2022-05-19
EP3923307B1 (en) 2025-07-09
CN110634655B (zh) 2021-05-14
EP3923307A1 (en) 2021-12-15
CN110634655A (zh) 2019-12-31
EP3923307A4 (en) 2022-11-09
US11527354B2 (en) 2022-12-13

Similar Documents

Publication Publication Date Title
WO2021027348A1 (zh) 磁集成器件、功率变换电路、充电器及电动车辆
US7136293B2 (en) Full wave series resonant type DC to DC power converter with integrated magnetics
JP4920417B2 (ja) 変圧器のためのリップル電流低減
CN1447504A (zh) 具有集成磁元件与同步整流的直流－直流转换器
KR102308809B1 (ko) 2단 전력 변환 장치
CN210575456U (zh) 一种提高功率密度的集成磁性元件
US11581818B2 (en) DC voltage conversion circuit and power supply device
KR20160122441A (ko) 차량용 충전 장치
CN111010044B (zh) 一种磁集成双有源桥变换器
US10374439B2 (en) Circuit arrangement having charge storage units
US20210082609A1 (en) Common-mode/differential-mode throttle for an electrically driveable motor vehicle
CN107786094B (zh) 一种正激开关电源
CN115765462A (zh) 功率变换组件及电子装置
CN113889324A (zh) 绝缘变压器及使用该绝缘变压器的功率转换装置
CN116246880A (zh) 一种极低漏感的反激变压器绕组方法
WO2019001218A1 (zh) 一种正激开关电源
Chen Compact and reliable isolated DC/DC and sic gate driver for automotive application
KR102144616B1 (ko) 결합 인덕터를 갖는 절연형 컨버터
CN205160378U (zh) 一种电动汽车及相应的多单元igbt模块驱动电源
US20170033702A1 (en) Power supply apparatus
TWI894659B (zh) 電力變壓器、電路板及變壓器的製造方法
CN223957439U (zh) 一种基于磁耦合双buck三端口双向变换电路及其装置
CN223771948U (zh) 一种等效式双向转换cllc功率变压组件
US20250104894A1 (en) Downsized variable inductor
Heris et al. Multidevice Dual Active Half Bridge DC-DC Converter with Zero-Input-Current-Ripple for EV Onboard Chargers Application

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20852993

Country of ref document: EP

Kind code of ref document: A1

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112021014228

Country of ref document: BR

ENP Entry into the national phase

Ref document number: 2020852993

Country of ref document: EP

Effective date: 20210908

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 112021014228

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20210720

WWG Wipo information: grant in national office

Ref document number: 2020852993

Country of ref document: EP