WO2018223715A1 - 一种电感和电源转换电路 - Google Patents

一种电感和电源转换电路 Download PDF

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Publication number
WO2018223715A1
WO2018223715A1 PCT/CN2018/074189 CN2018074189W WO2018223715A1 WO 2018223715 A1 WO2018223715 A1 WO 2018223715A1 CN 2018074189 W CN2018074189 W CN 2018074189W WO 2018223715 A1 WO2018223715 A1 WO 2018223715A1
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Prior art keywords
inductor
magnetic core
circuit board
winding
conductive
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Ceased
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PCT/CN2018/074189
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English (en)
French (fr)
Inventor
徐世超
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to EP18813268.2A priority Critical patent/EP3627524A4/en
Publication of WO2018223715A1 publication Critical patent/WO2018223715A1/zh
Priority to US16/704,721 priority patent/US20200111599A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • H01F17/00—Fixed inductances of the signal type
    • 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
    • H01F27/2847—Sheets; Strips
    • 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
    • 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
    • H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
    • H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
    • H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1584—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • 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
    • 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
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • 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
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/487—Neutral point clamped inverters
    • 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
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • 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
    • H01F2027/2814—Printed windings with only part of the coil or of the winding in the printed circuit board, e.g. the remaining coil or winding sections can be made of wires or sheets
    • 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
    • H01F27/2895—Windings disposed upon ring cores
    • 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
    • H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
    • H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
    • H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1584—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • H02M3/1586—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved

Definitions

  • Embodiments of the present invention relate to the field of circuits and, more particularly, to an inductor and power conversion circuit.
  • integrated inductors or inductor components are widely used, and their own magnetic induction characteristics are used to apply current and voltage in the circuit.
  • the basic composition of a common inductor is a magnetic core and a winding that is typically wound around a metal conductive line on the periphery of the core.
  • the wound inductors are made by the inductor manufacturer using magnetic core, enameled wire and glue auxiliary materials. The manufacturing process involves repeated winding of the metal conductive wires around the magnetic core, which is cumbersome and time consuming.
  • Embodiments of the present invention provide an inductor that does not need to repeatedly use a metal conductive wire to wrap a magnetic core to simplify the manufacturing process and shorten the manufacturing time of the inductor.
  • an embodiment of the present invention provides an inductor including a first partial winding second partial winding core and a winding, the winding including a first partial winding and a second partial winding, wherein
  • the first partial winding is a conductive path disposed on the circuit board
  • the second partial winding is a set of electrical conductors interposed with the circuit board, and the conductive path of the circuit board and the electrical conductors plugged into the circuit board are mutually The connection, wherein the electrical conductor may be electrically connected to the conductive path through a socket on the circuit board, or may be connected to the conductive path through a connector.
  • the inductor forms a continuous conductive winding wound around the magnetic core through a combined connection between the electrical conductor and the circuit board, so that by using different types of conductive medium combinations to form the inductor winding, it is not necessary to have a single winding during the manufacturing process.
  • the wire is wound around the wire repeatedly, which simplifies the manufacturing process of the inductor and shortens the production time.
  • the circuit board is provided with a plurality of via holes for inserting a conductive body, and the electrical conductor is inserted in the via hole and Interconnecting with the plurality of conductive paths, the vias are also located on both sides of the magnetic core perpendicularly projected on the circuit board, and are tangent or overlapping with the vertical projection, and the circuit board is electrically conductive
  • the paths are parallel to each other, and the conductive paths formed by the conductive layers of each of the circuit boards electrically connect the adjacent two conductors.
  • the via holes are provided for interposing the electrical conductors to quickly mount the electrical conductors and connect to form a complete winding.
  • the magnetic core is annular
  • the electrical conductor includes a plurality of U-shaped wires
  • the U-shaped wires respectively surround the magnetic core
  • the outer annular surface, the upper annular surface and the inner annular surface are respectively connected to the conductive path of the circuit board to form an inductor winding wound around the magnetic core.
  • the U-shaped wire and the conductive path are combined to form a winding form, which can avoid the action of repeated winding, and does not need to cut and bond the toroidal core during the manufacturing process, thereby simplifying the inductance.
  • Production process During the installation process, all the wires can be fixed together by means of a mounting fixture, and then inserted into the through holes of the circuit board at one time to achieve welding, thereby further improving the installation efficiency.
  • the two ends of the U-shaped opening of each of the electrical conductors are inserted into two via holes of the circuit board, and
  • the two vias connect the conductive paths formed by the conductive layers of the two different circuit boards, and the portion of the conductive body surrounding the outer annular surface of the magnetic core is smaller than the inner annular portion surrounding the magnetic core in the cross-sectional width of the magnetic core And the conductor cross-sectional width of the electrical conductor surrounding the upper toroidal portion is gradually reduced from the outer ring surface toward the inner annular surface.
  • the conductors have different cross-sectional widths for the maximum density of the windings on the surface of the core to maximize inductance efficiency.
  • the circuit board includes two circuit boards, and the electrical conductor includes a plurality of linear wires, and the wires of the type are respectively placed on the magnetic core An outer annular surface and an inner annular surface are respectively connected to the conductive paths of the two circuit boards to form a winding of the inductor wound around the magnetic core, and the two circuits are located on the upper and lower surfaces of the magnetic core, and the electrical conductor is located at two Between the boards and around the core.
  • the magnetic core may be in a circular shape, an elongated shape or an E shape, and the surface of the conductive body is provided with an insulating coating to prevent mutual conduction.
  • Short circuit can also be used directly for the enameled wire.
  • an embodiment of the present invention provides an inverter circuit that uses the inductor according to the first aspect to perform filtering.
  • the inverter circuit includes four diodes D1, D2, and D3 connected in series between positive and negative bus lines. D4, one for each of four switch tubes Q1, Q2, Q3 and Q4 connected in parallel across the four diodes, two capacitors C1 and C2 connected in series between the positive and negative bus bars, a filter inductor L and a filter capacitor C, wherein One end of the filter inductor L is connected to one end of D2 and D3 connected to each other, and the other end is connected to the load.
  • the filter capacitor C is connected in parallel at both ends of the load, and one end thereof is connected to the other end of the filter inductor L, wherein the filter inductor L is the inductance described in the above first aspect.
  • an embodiment of the present invention provides a power conversion circuit using the inductor according to the above first aspect as a variable current and voltage transformer component, wherein the power conversion circuit includes a DC power supply, at least one switching unit, and at least one inductance unit.
  • the at least one inductive unit is in one-to-one correspondence with the at least one switching unit, and each of the at least one inductive unit is connected to the DC power source through a corresponding switching unit, wherein each of the inductors
  • the unit includes the inductor of the first aspect described above.
  • the plurality of conductive bodies of the discontinuous inductance and the conductive paths of the circuit board are cooperatively connected to form the inductor winding wound around the magnetic core, because no winding operation is required during the manufacturing process.
  • the manufacturing steps and processes of such inductors are significantly simplified, and since the conductors are independent of each other, there is no problem of inter-turn short circuit, so that the inductance cost can be reduced and the reliability of the inductor can be improved.
  • FIG. 1 is a perspective view showing the structure of an inductor according to an embodiment of the present invention.
  • FIG. 2 is an exploded perspective view showing the structure of an inductor according to an embodiment of the present invention.
  • Fig. 3 is a perspective view showing the structure of an inductor according to still another embodiment of the present invention.
  • FIG. 4 is a perspective exploded view showing the structure of an inductor according to still another embodiment of the present invention.
  • Figure 5 is an inverter circuit diagram of an inductor in some embodiments of the present invention.
  • Figure 6 is a diagram of a power conversion system using an inductor in some embodiments of the present invention.
  • the inductor of the embodiment of the invention can be applied to various conversion circuits involving voltage or current, such as a power conversion circuit, and can also be applied to other circuits, such as an inverter circuit, a rectifier circuit, and a power conversion.
  • the circuit and the transformer circuit and the like are not limited in this embodiment of the present invention.
  • an inductor 10 in some embodiments of the present invention includes a magnetic core 12, a first partial winding, and a second partial winding, wherein the first partial winding is formed by a conductive layer of the circuit board 14. a plurality of conductive paths 140, the second portion is wound as a set of electrical conductors 16, and a conductive path 140 formed by the conductive layer of the circuit board 14 and the conductive body 16 are connected to each other to form a winding of the magnetic core 12. Continuous conductive line.
  • the circuit board may be a printed circuit board, and the conductive path formed by the conductive layer of the circuit board is a circuit board circuit formed by a metal conductive layer printed on the surface of the circuit board or embedded in the circuit board.
  • the plurality of electrically conductive paths 140 include a plurality of linear electrically conductive paths connecting the set of electrical conductors 16.
  • the second partial winding is independent of the plurality of conductors 16 outside the circuit board, that is, the second partial winding is not a printed circuit formed on the circuit board 14 like the first partial winding, and A set of independently formed electrical conductors 160, each of which is electrically conductively coupled to two electrically conductive paths 140 on the circuit board 14.
  • Each of the electrical conductors 16 surrounds a portion of the surface of the magnetic core, and the plurality of conductive paths 140 are wound around another portion of the surface of the magnetic core 12.
  • the electrical conductors 16 may be embedded in some carriers for mounting.
  • the carriers may be rubber rings, plastic mounting bodies or flexible circuit boards for snap fastening.
  • the magnetic core 12 is a toroidal magnetic core in some embodiments of the present invention.
  • the magnetic core 12 may also have various shapes such as a U-shape, an E-shape, a rectangular ring, and an elongated shape.
  • the magnetic core is a circular core 12 as an example, but the specific shape of the core is not limited.
  • the magnetic core 12 includes an outer annular surface, an inner annular surface, and upper and lower annular surfaces.
  • the electrical conductor 16 includes a plurality of U-shaped wires.
  • the U-shaped wires respectively surround the outer ring surface, the upper ring surface and the inner ring surface of the magnetic core 12, and are respectively connected with the plurality of conductive paths 140 of the circuit board 14 to form a continuous winding of the magnetic core The winding of the inductor 10 of 12.
  • the circuit board 14 is provided with a plurality of vias 142, and a conductive path 140 formed by the conductive layer of the circuit board 14 is disposed on the circuit board 14, and from the surface pattern of the circuit board 14, each A conductive via 140 formed by a conductive layer of the circuit board 14 connects two vias 142 at both ends.
  • the two ends of the U-shaped opening of each of the electrical conductors 16 are inserted into the two through holes 142 of the circuit board 14 , and the two via holes 142 are connected to two different conductive paths 140 .
  • the vias 142 of the circuit board 14 are located on both sides of the magnetic core 12 that are vertically projected on the circuit board 14, and are immediately adjacent to the vertical projection, even overlapping a small portion of the vertical projection.
  • the conductive path 140 formed by the conductive layer of the circuit board 14 is divergently extended from the inside of the circuit board 14.
  • the conductive path 140 formed by the conductive layer of each of the circuit boards 14 electrically connects the adjacent two conductive bodies 16.
  • the electrical conductor 16 is not connected to the circuit board 14 directly through the via 142 to connect the conductive path 140, but the circuit board 14 can be connected through a connector.
  • the electrically conductive path of the electrical conductor 16 and the electrically conductive path 140 is achieved by a conductive path 140, that is, by providing connectors that respectively connect the electrical conductor 16 and the electrically conductive path 140.
  • the conductor 16 is made of a highly conductive metal wire, for example, made of a highly conductive metal such as copper, aluminum, or silver.
  • the outer surface of the electric conductor 16 is coated with an insulating layer to prevent current loss or short-circuiting of the metal conductors 16 in contact with each other.
  • the electrical conductor 16 is an enameled wire.
  • the portion of the electric conductor 16 abutting the outer annular surface 120 of the magnetic core 12 is smaller than the inner annular surface portion of the magnetic core 12 in the cross-sectional width of the conductor, and the electric conductor 16 abuts the upper toroidal portion.
  • the wire cross-sectional width is gradually reduced from the outer ring surface toward the inner ring surface to combine the annular characteristics of the magnetic core 12 to achieve maximum coverage of the magnetic core 12 by the inductor 10 winding.
  • the plurality of electrical conductors 16 that are not continuous of the inductor 10 and the conductive path 140 formed by the conductive layer of the circuit board 14 are cooperatively connected to form the winding of the inductor 10 wound around the magnetic core 12 . Since the winding operation is not required during the manufacturing process, the cutting core is not required, the manufacturing steps and processes of such an inductor are significantly simplified, and since the conductors 16 are independent of each other, there is no problem of inter-turn short circuit. It can reduce the manufacturing cost of the inductor and improve the reliability of the inductor.
  • the inductor 20 in other embodiments of the present invention includes a magnetic core 22, a first partial winding, and a second partial winding and two sub-circuit boards 24, wherein the first partial winding is disposed
  • the conductive path 240 formed by the conductive layer of the two sub-circuit boards 24, the second portion is wound as a group of electrical conductors 26, and the conductive path 240 formed by the conductive layer of the two sub-circuit boards 24 and the conductive body 26 are mutually Connected to form a continuous conductive trace wound around the core 22.
  • the magnetic core 22 is a toroidal core in other embodiments of the invention.
  • the core 22 may be of other shapes such as a ring, a U, an E, and a strip.
  • the annular core 22 is exemplified in some embodiments of the invention, but the specific shape of the core is not limited.
  • the magnetic core 22 includes an outer annular surface, an inner annular surface, and upper and lower annular surfaces.
  • the electrical conductor 26 includes a plurality of elongated or linear conductors.
  • the wires are respectively abutted on the outer ring surface and the inner ring surface of the magnetic core 22, and are respectively connected with the conductive paths 240 formed by the conductive layers of the two sub-circuit boards 24 to form the inductance wound around the magnetic core 22. 20 windings.
  • the two sub-circuit boards 24 abut against the upper and lower annular surfaces, respectively.
  • the cross-sectional width of the wire abutting against the inner annular surface is smaller than the cross-sectional width of the wire abutting against the outer annular surface,
  • the inner and outer annulus of different area sizes are matched to achieve the maximum area coverage of the core to the core.
  • the plurality of via holes 242 and 244 are disposed on the two sub-circuit boards 24, and the conductive paths 240 formed by the conductive layers of the two sub-circuit boards 24 are disposed on the upper and lower surfaces of the circuit board 24, and from the circuit board 24 In view of the surface pattern, the conductive path 240 formed by the conductive layer of each circuit board 24 is connected to two via holes 242/244 at both ends.
  • each of the conductors 26 are respectively inserted into the upper and lower via holes 242 and 244 of the two sub-circuit boards 24, and the upper and lower via holes 242 and 244 are respectively connected to the upper and lower sub-subcircuits.
  • the vias 242, 244 of the two sub-circuit boards 24 are located on both sides of the magnetic core 22 that are vertically projected on the circuit board 24, and are adjacent to the vertical projection, even with a small portion of the vertical projection.
  • Stack The upper and lower conductive paths 240 of the two sub-circuit boards 24 are parallel to one another and extend divergently from the inside to the outside.
  • the electric conductor 26 is made of a highly conductive metal, and for example, may be made of a highly conductive metal such as copper, aluminum, or silver.
  • the outer surface of the conductor 26 is coated with an insulating layer to prevent current loss or short-circuiting of the metal conductors 26 in contact with each other.
  • the electrical conductor 26 is an enameled wire.
  • the plurality of electrical conductors 26 that are discontinuous in the inductor 20 and the conductive paths 240 formed by the conductive layers of the two sub-circuit boards 24 are coupled to form the winding of the inductor 20 wound around the magnetic core 22 . Since the winding operation is not required during the manufacturing process, the magnetic core is not required to be cut, the manufacturing steps and processes of such an inductor are significantly simplified, and since the conductors 26 are independent of each other, there is no problem of inter-turn short circuit. Therefore, the inductance cost can be reduced and the reliability of the inductor can be improved.
  • the inductor 10/20 is applied to the inverter circuit or the rectifier circuit as a filter or a rectifying inductor, but it can be understood that the inductor 10/20 is not limited to a specific application scenario. Used as a separate inductor, it can also be used as a coupling inductor, and can even be integrated into the terminal as the inductor of the terminal power conversion system.
  • the inverter circuit shown in FIG. 5 includes four diodes D1, D2, D3, and D4 connected in series between the positive and negative bus bars (BUS+, BUS-), and one-to-one correspondingly connected in parallel to the four ends of the four diodes.
  • the switch tubes Q1, Q2, Q3 and Q4 the two capacitors C1 and C2 connected in series between the positive and negative bus bars, the filter inductor L and the filter capacitor C, wherein one end of the filter inductor L is connected to one end of the D2 and D3 connected to each other, The other end is connected to the load.
  • the filter capacitor C is connected in parallel at both ends of the load, and one end thereof is connected to the other end of the filter inductor L, and the other end is grounded.
  • the inverter circuit is configured to convert direct current into alternating current, wherein the multi-level voltage is output by controlling the turn-on and turn-off of the Q1-4 by a modulation control signal, and the multi-level voltage is filtered by the filter inductor L and the capacitor C. After becoming an alternating current.
  • the power conversion system 300 includes a direct current (DC) power supply 310, at least one switching unit 320, at least one inductive unit 330, a filter capacitor 340, and a load 350.
  • the circuit operation principle of the power conversion system is a multi-phase interleaved parallel buck circuit, wherein two-phase inductors are coupled in pairs to form an inductor unit, and one or more inductor units are connected in parallel to provide energy to the load.
  • Two series-connected switching tubes (for example, switching tubes Q1 and Q2) form a switching unit. Each switch tube is connected to the control IC through a drive (DRV) to control the opening and closing of the switch tube.
  • DDRV drive
  • the at least one switching unit is in one-to-one correspondence with the at least one inductive unit, and each of the inductive units is connected to the DC power source through the corresponding switching unit, wherein the inductive unit may include the two-phase coupled inductor described in the above.
  • an inductor unit ie, a two-phase inductor, such as L1 shown in FIG. 6
  • L1 two-phase inductor
  • the first phase power conversion circuit is composed of one of a first switching unit (for example, a switching unit composed of switching transistors Q1 and Q2) and a first inductance unit (for example, an inductor L1).
  • a first switching unit for example, a switching unit composed of switching transistors Q1 and Q2
  • a first inductance unit for example, an inductor L1
  • the switch Q1 When the switch Q1 is turned on, the DC current passes through a phase of the inductor unit connected to the switch Q1, the inductor current starts to rise, and is filtered by the capacitor C to supply the load R; when Q1 is turned off, Q2 starts to conduct, and the filter
  • the voltage on the capacitor is reversely applied to the inductor, and the current of the inductor begins to drop, completing the freewheeling portion of the BUCK converter circuit.
  • the second phase power conversion circuit is composed of the switching transistors Q3, Q4 and another phase of the inductance unit L1.
  • the switch Q3 When the switch Q3 is turned on, the DC current passes through another phase of the inductor unit connected to the switch Q4, the inductor current starts to rise, and is filtered by the capacitor C to supply power to the load R; when Q3 is turned off, Q4 starts to conduct.
  • the voltage on the filter capacitor is reversely applied to the inductor, and the current of the inductor begins to drop, completing the freewheeling portion of the buck converter circuit.
  • the above two-phase step-down power conversion sections Q1, Q2, Q3, Q4 and the inductance unit L1 constitute a power conversion unit, that is, the first phase power conversion circuit and the second phase power conversion circuit together constitute the power conversion unit .
  • the power conversion may be implemented by using a single or multiple power conversion units in parallel.
  • multi-phase interleaved buck circuit listed above is only an illustrative example, and the present invention should not be limited in any way.
  • the two-phase coupled inductor of the embodiment of the present invention can also be applied to a multi-phase interleaved parallel boost circuit.
  • the present invention is not particularly limited thereto.

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Abstract

一种电感（10），该电感包括第一部分绕线、第二部分绕线、磁芯（12）和绕线，其中第一部分绕线为设置在电路板（14）的导电路径（140），第二部分绕线是与电路板插接的一组导电体（16），电路板的导电路径与电路板插接的导电体相互连接，该电感通过导电体与电路板之间的插接来形成缠绕磁芯的连续导电绕组。该电感使用不同类型的导电介质组合形成电感绕线，从而在制作过程中就不需像单一绕线一样反复缠绕导线的动作，也不需要制作过程中对磁芯进行切割和黏合。

Description

一种电感和电源转换电路 技术领域
本发明实施例涉及电路领域，并且更具体地，涉及一种电感和电源转换电路。
背景技术
在目前各种电子设备中的集成电路或供电电路中，集成电感或电感组件被广为应用，利用自身的磁感应特性来作用于电路中的电流以及电压。常见电感的基本组成是磁芯以及绕组，该绕组一般缠绕在该磁芯周边上的金属导电线。目前这种绕线式电感都是由电感制作商采用磁芯、漆包线、胶水辅材进行制作，制作过程中涉及金属导电线围绕磁芯的反复多次缠绕，过程繁琐而且耗时。
发明内容
本发明实施例提供一种电感，无需反复多次使用金属导电线缠绕磁芯以简化制作流程和缩短电感的制作时间。
第一方面，本发明实施例提供了一种电感，所述电感包括第一部分绕线第二部分绕线磁芯和绕线，所述绕线包括第一部分绕线和第二部分绕线，其中所述第一部分绕线为设置在电路板的导电路径，所述第二部分绕线是与电路板插接的一组导电体，所述电路板的导电路径与电路板插接的导电体相互连接，其中所述导电体可以通过在电路板上插孔与所述导电路径导电连接，也可以通过连接件与所述导电路径连接。
所述电感通过导电体与电路板之间的组合连接来形成缠绕所述磁芯的连续导电绕组，这样通过使用不同类型的导电介质组合形成电感绕线，可在制作过程中不需像单一绕线一样反复缠绕导线的动作，从而简化电感的制作流程，同时缩短制作时间。
结合第一方面，在第一方面的第一种可能的实现方式中，所述电路板上设置有供导电体插设的多个过孔，所述导电体插设在所述过孔内并与所述多个导电路径相互连接，这些过孔还位于所述磁芯在所述电路板上垂直投影的两侧，并且与所述垂直投影相切或交叠，而且所述电路板的导电路径相互平行，每一所述电路板的导电层形成的导电路径导电连接相邻的两导电体。
所述过孔的设置是用于插设所述导电体，以便快速安装所述导电体并连接形成完整的绕线。
结合第一方面，在第一方面的第二种可能的实现方式中，所述磁芯呈环形，所述导电体包括多个U型导线，所述U型导线分别环绕在所述磁芯的外环面、上环面以及内环面，并分别与所述电路板的导电路径连接形成缠绕所述磁芯的电感绕线。
对于环形磁芯的场景，所述U型导线与导电路径组合形成的绕线形式，既可避免反复绕线的动作，也不需要在制作过程中对环形磁芯进行切割和黏合，从而简化电感的制作过程。在安装过程中，还可以借助一安装固定件先把所有导线固定在一起，然后一次性插入电路板的过孔中实现焊接，从而进一步提高安装的效率。
结合第一方面，在第一方面的第三种可能的实现方式中，所述每一所述导电体的U型开口上的两端插设在所述电路板的两个过孔内，且所述两过孔连接两不同的电路板的导电 层形成的导电路径，所述导电体环绕所述磁芯的外环面的部分在导线截面宽度上小于环绕所述磁芯的内环面部分，而且所述导电体环绕上环面部分的导线截面宽度由所述外环面向所述内环面逐渐减少。
所述导电体具有不同的截面宽度是为了在磁芯表面上最大密度的排布绕线，以使电感效率最大化。
结合第一方面，在第一方面的第四种可能的实现方式中，所述电路板包括二电路板，所述导电体包括多个直线型导线，所型导线分别靠在所述磁芯的外环面以及内环面，并分别与所述二电路板的导电路径连接形成缠绕所述磁芯的所述电感的绕线，该二电路上位于磁芯上下面上，该导电体位于二电路板之间并围绕在磁芯周围。
结合第一方面，在第一方面的第五种可能的实现方式中，所述磁芯可以呈圆环形，长条形或者E型，所述导电体表面有绝缘涂层以防止相互间导通发生短路，也可以直接为漆包线。
第二方面，本发明实施例提供了一种逆变电路采用上述第一方面所述的电感进行滤波，该逆变电路包括四个依次串联在正负母线之间的二极管D1、D2、D3以及D4、分别一一对应并联在所述四二极管两端的四个开关管Q1、Q2、Q3以及Q4、串联在正负母线之间的二电容C1和C2、滤波电感L和滤波电容C，其中所述滤波电感L的一端与D2和D3相互连接的一端连接，另一端与负载连接，所述滤波电容C并联在负载两端，而且其一端与滤波电感L的另一端连接，其中所述滤波电感L就是上述第一方面所述的电感。
第三方面，本发明实施例提供了一种电源转换电路使用上述第一方面所述的电感作为变流和变压组件，所述电源转化电路包括直流电源，至少一个开关单元，至少一个电感单元，所述至少一个电感单元与所述至少一个开关单元一一对应，所述至少一个电感单元中的每个电感单元通过所对应的开关单元与所述直流电源相连，其中，所述每个电感单元包括上述第一方面所述的电感。
本发明实施例中，上述电感不连续的多个个导电体和所述电路板的导电路径相配合连接形成缠绕所述磁芯的所述电感绕线，由于在制作过程中不需要进行缠绕操作，显著简化了此类电感的制作步骤和过程，也由于所述导电体相互独立，不会出现匝间短路的问题，因此能够降低电感成本的同时提高了电感的可靠性。
附图说明
图1是本发明一实施例的电感的结构立体图。
图2是本发明一实施例的电感的结构立体分解图。
图3是本发明又一实施例的电感的结构立体图。
图4是本发明又一实施例的电感的结构立体分解图。
图5是使用本发明一些实施例中的电感的逆变电路图。
图6是是使用本发明一些实施例中的电感的电源转换系统图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。
本发明实施例的电感作为一种电子元器件，可以应用于各种涉及电压或电流的变换电 路，如电源转换电路，也可以应用于其他的电路中，如逆变电路、整流电路、功率变换电路以及变压电路等等，本发明实施例对此不作限定。
如图1和2所示，本发明一些实施例中的电感10包括磁芯12、第一部分绕线以及第二部分绕线，其中所述第一部分绕线为由电路板14的导电层形成的多个导电路径140，所述第二部分绕线为一组导电体16，所述电路板14的导电层形成的导电路径140与所述导电体16相互连接，形成缠绕所述磁芯12的连续导电线路。
在本发明的一些实施例中，所述电路板可以为印刷电路板，所述电路板的导电层形成的导电路径为印制在电路板表面的金属导电层形成的电路板线路或者为埋设在电路板内层的金属导电夹层形成的电路板线路。所述多个导电路径140包括连接所述一组导电体16的多个直线型导电路径。所述第二部分绕线为独立于所述电路板外的多个导电体16，也就是所述第二部分绕线不是和第一部分绕线一样形成在电路板14上的印制电路，而是一组独立形成的导电体160，每一所述导电体16与电路板14上的二导电路径140导电连接。每一所述导电体16环绕在所述磁芯一部分表面上，所述多条导电路径140绕在所述磁芯12剩余的另一部分表面上。在本发明的某一些实施例中，所述导电体16可以嵌入在某些载体上进行安装，该载体可以是一些用于卡扣固定的橡胶圈、塑料安装体或者柔性电路板等。
所述磁芯12在本发明一些实施例中为圆环性磁芯，在其它实施例中所述磁芯12也可以是U型、E型、矩形环以及长条形等各种形状。可以理解的是，为了便于阐述本发明的具体实施方式，在本发明一些实施例中以所述磁芯为圆环形磁芯12为例，但是并不限定磁芯的具体形状。所述磁芯12包括外环面、内环面以及上下相对的上、下环面。
所述导电体16包括多个U型导线。所述U型导线分别环绕在所述磁芯12的外环面、上环面以及内环面，并分别与所述电路板14的所述多条导电路径140连接形成连续缠绕所述磁芯12的所述电感10的绕线。
所述电路板14上设置有多个过孔142，所述电路板14的导电层形成的导电路径140设置在所述电路板14上，而且从所述电路板14的表面图形来看，每一所述电路板14的导电层形成的导电路径140两端连接两个过孔142。
其中，每一所述导电体16的U型开口上的两端插设在所述电路板14的两个过孔142内，且所述两过孔142连接两不同的导电路径140。所述电路板上14的过孔142位于所述磁芯12在所述电路板14上垂直投影的两侧，并且紧挨所述垂直投影，甚至与所述垂直投影有小部分交叠。所述电路板14的导电层形成的导电路径140由电路板14内向外发散延伸，每一所述电路板14的导电层形成的导电路径140导电连接相邻的两导电体16。
可以理解的是，在一些实施例中，所述导电体16并不与电路板14直接通过过孔142插接来连接所述导电路径140，而是可通过连接器来连接所述电路板14上的导电路径140，也就是通过设置分别连接所述导电体16和导电路径140的连接器来实现所述导电体16与所述导电路径140的导电连接。
所述导电体16由高导电金属制成的导线，例如，可以由铜、铝以及银等高导电金属制成。所述导电体16的外表面涂覆有绝缘层，以防止电流损失或者所述金属导体16相互接触发生短路。在一些实施例中，所述导电体16为漆包线。所述导电体16紧靠所述磁芯12的外环面120的部分在导线截面宽度上小于紧靠所述磁芯12的内环面部分，而且所述导电体16紧靠上环面部分的导线截面宽度由所述外环面向所述内环面逐渐减少，以结合 所述磁芯12的环形特性来实现电感10绕线对所述磁芯12的最大化覆盖。
本发明实施例中，上述电感10不连续的多个个导电体16和所述电路板14的导电层形成的导电路径140相配合连接形成缠绕所述磁芯12的所述电感10绕线，由于在制作过程中不需要进行缠绕操作，所以不需要切割磁芯，显著简化了此类电感的制作步骤和过程，也由于所述导电体16相互独立，不会出现匝间短路的问题，因此能够降低电感制作成本的同时提高了电感的可靠性。
如图3和4所示，在本发明另一些实施例中的电感20包括磁芯22、第一部分绕线以及第二部分绕线和二子电路板24，其中所述第一部分绕线为设置在所述二子电路板24的导电层形成的导电路径240，所述第二部分绕线为一组导电体26，所述二子电路板24的导电层形成的导电路径240与所述导电体26相互连接，形成缠绕所述磁芯22的连续导电线路。
所述磁芯22在本发明另一些实施例中为圆环型磁芯，在其它实施例中所述磁芯22也可以是其它种环形、U型、E型以及长条形等各种形状。可以理解的是，为了便于阐述本发明的具体实施方式，在本发明一些实施例中以所述圆环形磁芯22为例，但是并不限定磁芯的具体形状。所述磁芯22包括外环面、内环面以及上下相对的上、下环面。
所述导电体26包括多个长条或直线型导线。所述导线分别紧靠在所述磁芯22的外环面以及内环面，并分别与所述二子电路板24的导电层形成的导电路径240连接形成缠绕所述磁芯22的所述电感20的绕线。所述二子电路板24分别抵靠在所述上下环面上。由于所述磁芯22的内环面面积小于其外环面的面积，抵靠在所述内环面上的导线横截面宽度小于抵靠在所述外环面上的导线横截面宽度，以匹配不同面积大小的内外环面来实现导线对磁芯的最大面积覆盖。
所述二子电路板24上均设置有多个过孔242、244，所述二子电路板24的导电层形成的导电路径240设置在所述电路板24上下表面，而且从所述电路板24的表面图形来看，每一电路板24的导电层形成的导电路径240两端连接两个过孔242/244。
其中，每一所述导电体26的两端分别插设在所述二子电路板24的上下两个过孔242、244内，且所述上下两过孔242、244分别连接所述上下二子电路板24上的相互平行的二导电路径240。所述二子电路板上24的过孔242、244位于所述磁芯22在所述电路板24上垂直投影的两侧，并且紧挨所述垂直投影，甚至与所述垂直投影有小部分交叠。所述二子电路板24的上下导电路径240一一对应平行且由内向外发散延伸。所述导电体26由高导电金属制成，例如，可以由铜、铝以及银等高导电金属制成。所述导电体26的外表面涂覆有绝缘层，以防止电流损失或者所述金属导体26相互接触发生短路。在一些实施例中，所述导电体26为漆包线。
本发明实施例中，上述电感20不连续的多个个导电体26和所述二子电路板24的导电层形成的导电路径240相配合连接形成缠绕所述磁芯22的所述电感20绕线，由于在制作过程中不需要进行缠绕操作，所以不需要切割磁芯，显著简化了此类电感的制作步骤和过程，也由于所述导电体26相互独立，不会出现匝间短路的问题，因此能够降低电感成本的同时提高了电感的可靠性。
在本发明一些实施例中，上述电感10/20应用于逆变器电路或整流电路中作为滤波或整流电感来使用，但可以理解的是，上述电感10/20并不限定具体应用场景，可以作为单独电感使用，也可以用作耦合电感使用，甚至可以集成在终端作为终端电源转换系统的电 感。如图5所示的逆变电路包括四个依次串联在正负母线(BUS+、BUS-)之间的二极管D1、D2、D3以及D4、分别一一对应并联在所述四二极管两端的四个开关管Q1、Q2、Q3以及Q4、串联在正负母线之间的二电容C1和C2、滤波电感L和滤波电容C，其中所述滤波电感L的一端与D2和D3相互连接的一端连接，另一端与负载连接。
所述滤波电容C并联在负载两端，而且其一端与滤波电感L的另一端连接，另一端接地。
所述二电容C1和C2相互连接的重点也接地。
所述逆变电路用于将直流电转换为交流电，其中通过调制控制信号控制所述Q1-4的开通和关断来输出多电平电压，所述多电平电压经过滤波电感L和电容C整理后变成交流电。
如图6所示，该电源转换系统300包括：直流(Direct Current，DC)电源310、至少一个开关单元320、至少一个电感单元330、滤波电容340和负载350。该电源转换系统的电路工作原理为多相交错并联降压电路，其中，两相电感两两耦合，形成一个电感单元，一个或多个电感单元并联输出给负载提供能量。两个串联的开关管(例如，开关管Q1和Q2)构成一个开关单元。各开关管通过驱动(Drive，DRV)与控制IC连接，以控制开关管的开通与关断。至少一个开关单元与至少一个电感单元一一对应，每个电感单元通过所对应的开关单元与直流电源相连，其中，该电感单元可以包括上文中所描述中的两相耦合的电感。
以下，为方便理解和说明，以一个电感单元(即，两相电感，例如图6中所示L1)为例，详细说明电感单元的工作原理。
第一相电源转换电路由第一开关单元(例如，开关管Q1、Q2组成的开关单元)以及第一电感单元(例如，电感L1)中的一相组成。开关管Q1导通时，直流电流通过电感单元中与开关管Q1连接的一相，电感电流开始上升，并经电容C滤波后给负载R供电；当Q1关断后，Q2开始导通，滤波电容上的电压反向加在电感上，电感的电流开始下降，完成BUCK转换电路中的续流部分。同理，第二相电源转换电路由开关管Q3、Q4以及电感单元L1中的另外一相组成。开关管Q3导通时，直流电流通过电感单元中与开关管Q4连接的另外一相，电感电流开始上升，并经电容C滤波后给负载R供电；当Q3关断后，Q4开始导通，滤波电容上的电压反向加在电感上，电感的电流开始下降，完成降压转换电路中的续流部分。上述的两相降压电源转换部分Q1、Q2、Q3、Q4以及电感单元L1组成一个电源转换单元，也就是所述第一相电源转换电路以及第二相电源转换电路一起组成所述电源转换单元。根据所述电源转换单元的输出负载对电流的不同要求，可以采用单个或者多个电源转换单元并联的方式来实现功率变换。
应理解，以上列举的多相交错并联降压电路仅为示例性说明，不应对本发明构成任何限定，例如，本发明实施例的两相耦合电感还可以应用于多相交错并联升压电路，本发明对此并未特别限定。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。

Claims (13)

  1. 一种电感，其特征在于，所述电感包括：磁芯和绕线，其中，所述绕线包括第一部分绕线和第二部分绕线，所述第一部分绕线为由电路板的导电层形成的多条导电路径，所述第二部分绕线为独立于所述电路板外的多个导电体，所述电路板的所述多条导电路径与所述多个导电体导电连接，形成缠绕所述磁芯的连续导电的所述绕线。
  2. 根据权利要求1所述的电感，其特征在于，所述电路板上设置有多个过孔，所述多个导电体通过所述多个过孔与所述多个导电路径导电连接。
  3. 根据权利要求2所述的电感，其特征在于，所述多条导电路径上设置有所述多个过孔，所述多个导电体的至少一部分插设在所述多个过孔内，与所述多个导电路径形成导电连接。
  4. 根据权利要求3所述的电感，其特征在于，所述多个过孔位于所述磁芯在所述电路板上的垂直投影的两侧，并且与所述垂直投影相切或交叠。
  5. 根据权利要求1至4任一项所述的电感，其特征在于，所述多条导电路径由内向外发散延伸，每一所述多条导电路径导电连接所述多个导电体中的两个。
  6. 根据权利要求1至5任一项所述的电感，其特征在于，所述多个导电体包括多个U型导线，所述多个U型导线的每一个U型导线环绕在所述磁芯一部分表面上，所述多条导电路径绕在所述磁芯剩余的另一部分表面上。
  7. 根据权利要求6所述的电感，其特征在于，所述多个U型导线中的每一个U型导线的开口的两端部分别插设在所述多个过孔中的两个过孔中且通过所述两个过孔导电连接所述多条导电路径中的两条。
  8. 根据权利要求6或7所述的电感，其特征在于，所述每一个U型导线环绕所述磁芯一侧面的部分在导线截面宽度上小于环绕所述磁芯的另一相对侧面的部分，而且所述每一个U型导线环绕所述磁芯顶面的部分的导线截面宽度由所述磁芯一侧面向另一相对侧面逐渐增大，所述磁芯顶面的部分连接所述磁芯的一侧面和另一相对侧面。
  9. 根据权利要求1至5任一项所述的电感，其特征在于，所述电路板包括二子电路板，所述二个子电路板相互独立，所述多个导电体包括多个直线型导线，所述多个直线型导线中的每一个直线型导线的两端部分别插设在设置在所述二子电路板上的两个过孔内。
  10. 根据权利要求9所述的电感，其特征在于，所述多个直线型导线中一部分抵靠在所述磁芯的一侧面，所述多个直线型导线中的另一部分抵靠在所述磁芯的另一相对侧面。
  11. 根据权利要求1至10任一项所述的电感，其特征在于，所述磁芯呈环形或长条形，所述多个导电体表面包覆绝缘材料。
  12. 一种逆变电路，包括四个依次串联在正负母线之间的二极管D1、D2、D3以及D4、分别一一对应并联在所述四个二极管两端的四个开关管Q1、Q2、Q3以及Q4、串联在所述正负母线之间的二个电容C1和C2、滤波电感L和滤波电容C，其中所述滤波电感L的一端与D2和D3相互连接的一端连接，另一端用于连接负载，所述滤波电容C用于并联在所述负载两端，所述滤波电容C一端与所述滤波电感L的另一端连接，所述滤波电容C另一端接地，其特征在于，所述滤波电感L为如权利要求1至10任一项所述的电感。
  13. 一种电源转换电路，其特征在于，所述电源转化电路包括：
    直流电源；
    至少一个开关单元；
    至少一个电感单元，所述至少一个电感单元与所述至少一个开关单元一一对应，所述至少一个电感单元中的每个电感单元通过所对应的开关单元与所述直流电源相连，其中，所述每个电感单元包括所述权利要求1至10中任一项所述的电感。
PCT/CN2018/074189 2017-06-09 2018-01-25 一种电感和电源转换电路 Ceased WO2018223715A1 (zh)

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