WO2022034728A1 - 双方向dc-dcコンバータ - Google Patents
双方向dc-dcコンバータ Download PDFInfo
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- WO2022034728A1 WO2022034728A1 PCT/JP2021/021074 JP2021021074W WO2022034728A1 WO 2022034728 A1 WO2022034728 A1 WO 2022034728A1 JP 2021021074 W JP2021021074 W JP 2021021074W WO 2022034728 A1 WO2022034728 A1 WO 2022034728A1
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- transformer
- bidirectional
- bypass switch
- bridge circuit
- converter
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- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02M3/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
-
- 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
- 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
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- 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
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- 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
- H02M1/0064—Magnetic structures combining different functions, e.g. storage, filtering or transformation
-
- 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
- H02M3/015—Resonant DC/DC converters with means for adaptation of resonance frequency, e.g. by modification of capacitance or inductance of resonance circuit
-
- 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
- H02M3/33571—Half-bridge at primary side of an isolation transformer
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Definitions
- the present invention relates to a bidirectional DC-DC converter that bidirectionally converts DC power input / output between two DC power supplies.
- Patent Document 1 discloses a bidirectional resonance type DC-DC converter having LC resonance circuits on the primary side and the secondary side of the transformer, respectively.
- the conventional bidirectional DC-DC converter described in Patent Document 1 has a problem that the gain of the output voltage changes in a non-linear manner, so that the range of the output voltage is limited and the control stability is low.
- the bidirectional DC-DC converter according to the present invention is a DC-DC converter capable of bidirectionally converting DC power between a first DC power supply and a second DC power supply, and is a transformer and the first.
- a first bridge circuit that mutually converts DC power and AC power input / output between the DC power supply and the primary side of the transformer, and the second DC power supply and the secondary side of the transformer.
- a second bridge circuit that mutually converts DC power and AC power input and output between them, and a first resonance circuit that can be connected between the first bridge circuit and the primary side of the transformer.
- the second resonance circuit that can be connected between the second bridge circuit and the secondary side of the transformer, and the first resonance circuit between the first bridge circuit and the primary side of the transformer.
- a first bypass switch for switching the connection state, a second bypass switch for switching the connection state of the second resonance circuit between the second bridge circuit and the secondary side of the transformer, and the first bypass switch.
- a control unit for controlling the bypass switch and the second bypass switch, respectively, is provided.
- FIG. 1 is a schematic configuration diagram of a bidirectional DC-DC converter according to the first embodiment of the present invention.
- the bidirectional DC-DC converter 1 shown in FIG. 1 is connected between a DC power supply 100 and a DC power supply 101, and is capable of bidirectionally converting DC power between the DC power supply 100 and the DC power supply 101. It is a DC converter. That is, when power flows from the DC power supply 100 to the DC power supply 101, the DC power output from the DC power supply 100 is converted into power by the bidirectional DC-DC converter 1 and input to the DC power supply 101. At that time, the DC power supply 100 operates as a power source, and the DC power supply 101 operates as a load.
- the DC power output from the DC power supply 101 is converted into power by the bidirectional DC-DC converter 1 and input to the DC power supply 100.
- the DC power supply 101 operates as a power source, and the DC power supply 100 operates as a load.
- the bidirectional DC-DC converter 1 includes a converter circuit unit 130 and a control unit 131.
- the converter circuit unit 130 is connected to the DC power supply 100 via the positive electrode terminal 102 and the negative electrode terminal 103, and is connected to the DC power supply 101 via the positive electrode terminal 104 and the negative electrode terminal 105.
- the converter circuit unit 130 includes current sensors 106, 107, voltage sensors 108, 109, smoothing capacitors 110, 111, bridge circuits 112, 113, bypass switches 116, 117, resonant circuits 118, 119, and a transformer 120. It is configured with and.
- the current sensor 106 is connected between the DC power supply 100 and the bridge circuit 112, and detects the current flowing through the DC power supply 100.
- the current sensor 107 is connected between the DC power supply 101 and the bridge circuit 113, and detects the current flowing through the DC power supply 101. The detection result of each current by these current sensors is output from the converter circuit unit 130 to the control unit 131 as a sensor signal 123.
- the voltage sensor 108 detects the voltage of the DC power supply 100.
- the voltage sensor 109 detects the voltage of the DC power supply 101.
- the detection result of each voltage by these voltage sensors is output from the converter circuit unit 130 to the control unit 131 as a sensor signal 123.
- the smoothing capacitor 110 is connected to the DC power supply 100 in parallel with the bridge circuit 112, and smoothes the DC power input / output between the DC power supply 100 and the bridge circuit 112.
- the smoothing capacitor 111 is connected to the DC power supply 101 in parallel with the bridge circuit 113, and smoothes the DC power input / output between the DC power supply 101 and the bridge circuit 113.
- the bridge circuit 112 mutually converts DC power and AC power input / output between the DC power supply 100 and the primary side of the transformer 120. That is, when power flows from the DC power supply 100 to the DC power supply 101, the bridge circuit 112 converts the DC power output from the DC power supply 100 into AC power and outputs it to the primary side of the transformer 120. On the contrary, when the power flows from the DC power supply 101 to the DC power supply 100, the bridge circuit 112 converts the AC power flowing on the primary side of the transformer 120 into DC power and outputs the AC power to the DC power supply 100.
- the bridge circuit 113 mutually converts DC power and AC power input / output between the DC power supply 101 and the secondary side of the transformer 120. That is, when power flows from the DC power supply 100 to the DC power supply 101, the bridge circuit 113 converts the AC power flowing on the secondary side of the transformer 120 into DC power and outputs it to the DC power supply 101. On the contrary, when the power flows from the DC power supply 101 to the DC power supply 100, the bridge circuit 113 converts the DC power output from the DC power supply 101 into AC power and outputs it to the secondary side of the transformer 120.
- the bridge circuits 112 and 113 are each composed of a full bridge circuit having two legs, and each leg is configured by connecting two arms in parallel by connecting a switching element 114 and a diode 115 in parallel.
- FIG. 1 shows an example of bridge circuits 112 and 113 using a full bridge circuit
- the bridge circuits 112 and 113 may be realized by a half-bridge circuit composed of one leg, as will be described later.
- Each switching element 114 of the bridge circuits 112 and 113 operates according to the gate control signal 124 input from the control unit 131, and switches to either an on or off state.
- Each switching element 114 is configured by using, for example, an IGBT (Insulated Gate Bipolar Transistor) or a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor). In the case of MOSFET, the body diode of each switching element 114 may be used as the diode 115.
- FIG. 2 is a diagram showing a configuration example of the bridge circuits 112 and 113.
- FIG. 2A shows a configuration example of the bridge circuits 112 and 113 using the full bridge circuit, similar to those shown in FIG.
- four switching elements 114 and four diodes 115 are arranged in each of the bridge circuits 112 and 113.
- FIG. 2B shows a configuration example of the bridge circuits 112 and 113 using the half-bridge circuit. In the circuit configuration of FIG. 2B, two switching elements 114 and two diodes 115 are arranged in each of the bridge circuits 112 and 113.
- the transformer 120 for high frequency is configured by winding the primary winding and the secondary winding around the iron core at a predetermined turns ratio, respectively, and has the primary side and the secondary side.
- the voltage of AC power is converted between the two according to the turns ratio.
- a multi-winding transformer 120 having a plurality of windings on the primary side and the secondary side may be used.
- each switching element 114 of the bridge circuit 112 When power flows from the DC power supply 100 to the DC power supply 101, each switching element 114 of the bridge circuit 112 operates at a predetermined cycle, so that the DC power supplied from the DC power supply 100 is converted into AC power.
- the AC power after voltage conversion is transmitted from the primary side to the secondary side of the transformer 120.
- This AC power is rectified by each diode 115 of the bridge circuit 113, converted into DC power, and output to the DC power supply 101.
- each switching element 114 of the bridge circuit 113 when power flows from the DC power supply 101 in the direction of the DC power supply 100, each switching element 114 of the bridge circuit 113 operates in a predetermined cycle, so that the DC power supplied from the DC power supply 101 becomes an AC power. It is converted, and the AC power after voltage conversion is transmitted from the secondary side to the primary side of the transformer 120.
- This AC power is rectified by each diode 115 of the bridge circuit 112, converted into DC power, and output to the DC power supply 100.
- the resonance circuit 118 is provided on the primary side of the transformer 120, and is configured by using the capacitor C1 and the inductor L1 connected in series. The positions of the capacitor C1 and the inductor L1 may be exchanged.
- a bypass switch 116 is connected between both ends of the resonance circuit 118.
- the bypass switch 116 is configured by using, for example, various relays.
- the bypass switch 116 and the resonance circuit 118 are connected between the bridge circuit 112 and the primary side of the transformer 120, respectively.
- the bypass switch 116 and the resonance circuit 118 are connected in parallel with each other, and the connection state of the resonance circuit 118 between the bridge circuit 112 and the primary side of the transformer 120 is switched according to the switching state of the bypass switch 116. That is, when the bypass switch 116 is switched to the open (off) state, the bridge circuit 112 and the primary side of the transformer 120 are connected via the resonance circuit 118, and the LC resonance circuit is connected to the primary side of the transformer 120. It is formed.
- bypass switch 116 when the bypass switch 116 is switched to the conduction (on) state, the bridge circuit 112 and the primary side of the transformer 120 are connected without going through the resonance circuit 118.
- the switching state of the bypass switch 116 is controlled according to the switch control signal 132 input from the control unit 131.
- the resonance circuit 119 is provided on the secondary side of the transformer 120, and is configured by using the capacitor C2 and the inductor L2 connected in series. The positions of the capacitor C2 and the inductor L2 may be exchanged.
- a bypass switch 117 is connected between both ends of the resonance circuit 119.
- the bypass switch 117 is configured by using, for example, various relays.
- the bypass switch 117 and the resonance circuit 119 are connected between the bridge circuit 113 and the secondary side of the transformer 120, respectively.
- the bypass switch 117 and the resonance circuit 119 are connected in parallel to each other, and the connection state of the resonance circuit 119 between the bridge circuit 113 and the secondary side of the transformer 120 is switched according to the switching state of the bypass switch 117. .. That is, when the bypass switch 117 is switched to the open (off) state, the bridge circuit 113 and the secondary side of the transformer 120 are connected via the resonance circuit 119, and LC resonance occurs on the secondary side of the transformer 120.
- the circuit is formed.
- bypass switch 117 when the bypass switch 117 is switched to the conduction (on) state, the bridge circuit 113 and the secondary side of the transformer 120 are connected without going through the resonance circuit 119.
- the switching state of the bypass switch 117 is controlled according to the switch control signal 133 input from the control unit 131.
- the control unit 131 generates the gate control signal 124 and the switch control signals 132, 133 by performing predetermined arithmetic processing based on the sensor signal 123 from each sensor and the control command 134 input from the outside.
- the control command 134 is input via an operation unit (not shown), for example, by an operator who operates the system on which the bidirectional DC-DC converter 1 is mounted.
- the control unit 131 outputs the generated gate control signal 124 to the bridge circuits 112 and 113, and outputs the switch control signals 132 and 133 to the bypass switches 116 and 117, respectively.
- the control unit 131 is configured by using, for example, a microcomputer, and realizes a desired arithmetic process by executing a program stored in advance in a memory or the like.
- a logic circuit such as FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit) may be used instead of the microcomputer, or may be used in combination with the microcomputer to configure the control unit 131.
- FIG. 3 is a table showing the switching state of the bypass switches 116 and 117 controlled by the control unit 131 in the bidirectional DC-DC converter according to the first embodiment of the present invention.
- columns 201 and 202 represent the states of the switch control signals 132 and 133, respectively
- columns 203 and 204 represent the switching states of the bypass switches 116 and 117, respectively.
- Column 205 represents the operation mode (direction in which power flows) of the bidirectional DC-DC converter 1.
- the control unit 131 switches as shown in the table of FIG.
- the control signal 132 is output at "0", that is, at a low level
- the switch control signal 133 is output at "1", that is, at a high level.
- the bypass switch 116 (S1) is switched to the open state
- the bypass switch 117 (S2) is switched to the conductive state.
- the resonant circuit 118 is connected between the bridge circuit 112 and the primary side of the transformer 120, and an LC resonant circuit is formed on the primary side of the transformer 120.
- the control unit 131 performs the mode 1 operation by switching each switching element 114 of the bridge circuit 112 so that electric power flows in the forward direction through the LC resonance circuit.
- the control unit 131 when converting the DC power flowing in the direction (reverse direction) of the DC power supply 101 from the DC power supply 101, the control unit 131 sets the switch control signal 132 to "1", that is, a high level, as shown in the table of FIG. Is output, and the switch control signal 133 is output at "0", that is, at a low level.
- the bypass switch 116 (S1) is switched to the conductive state
- the bypass switch 117 (S2) is switched to the open state.
- the resonant circuit 119 is connected between the bridge circuit 113 and the secondary side of the transformer 120, and an LC resonant circuit is formed on the secondary side of the transformer 120.
- the control unit 131 performs the mode 2 operation by switching each switching element 114 of the bridge circuit 113 so that electric power flows in the opposite direction via the LC resonance circuit.
- FIG. 4 is a diagram illustrating switching control of the bypass switches 116 and 117 by the control unit 131.
- the control unit 131 switches the bypass switches 116 (S1) and 117 (S2) by changing the switch control signals 132 and 133 at predetermined timings, respectively, and with respect to the bridge circuits 112 and 113.
- the gate control signal 124 is output, and each switching element 114 (G1 to G8) is switched.
- the bidirectional DC-DC converter 1 the operation of the mode 1 in which the electric power flows in the forward direction and the operation in the mode 2 in which the electric power flows in the reverse direction are alternately performed.
- the control unit 131 outputs the switch control signals 132, 133 and the gate control signal 124 as shown below.
- both the bypass switches 116 (S1) and 117 (S2) are in the open state.
- the control unit 131 switches the bypass switch 117 to the conduction state by changing the switch control signal 133 from the low level to the high level.
- the resonance circuit 118 is connected to the primary side of the transformer 120, and the resonance circuit 119 is not connected to the secondary side.
- the control unit 131 starts outputting the gate control signal 124 to each switching element 114 of the bridge circuit 112.
- the operation of the bridge circuit 112 is started, and the bidirectional DC-DC converter 1 operates in mode 1, so that power conversion from the primary side to the secondary side of the transformer 120 is performed.
- a current flows from the DC power supply 100 to the DC power supply 101.
- the control unit 131 When switching from mode 1 to mode 2, first, at time t2, the control unit 131 stops the output of the gate control signal 124 to each switching element 114 of the bridge circuit 112. Then, when the output power from the bridge circuit 113 to the DC power supply 101 becomes less than a predetermined value, for example, less than 1 [W], the control unit 131 changes the switch control signal 133 from the high level to the low level at time t3. , The bypass switch 117 is switched to the open state. After that, at time t4, the control unit 131 switches the bypass switch 116 to the conduction state by changing the switch control signal 132 from the low level to the high level. As a result, the resonance circuit 118 is not connected to the primary side of the transformer 120, and the resonance circuit 119 is connected to the secondary side.
- a predetermined value for example, less than 1 [W
- the control unit 131 starts outputting the gate control signal 124 to each switching element 114 of the bridge circuit 113.
- the operation of the bridge circuit 113 is started, and the bidirectional DC-DC converter 1 operates in the mode 2, so that power conversion from the secondary side to the primary side of the transformer 120 is performed.
- a current flows from the DC power supply 101 in the direction of the DC power supply 100.
- the output of the gate control signal 124 has a delay corresponding to the period from time t2 to time t5 when switching from mode 1 to mode 2.
- the control unit 131 stops the output of the gate control signal 124 to each switching element 114 of the bridge circuit 113. Then, when the output power from the bridge circuit 112 to the DC power supply 100 becomes less than a predetermined value, the control unit 131 changes the switch control signal 132 from the high level to the low level at time t8 to open the bypass switch 116. Switch to. After that, at time t9, the control unit 131 switches the bypass switch 117 to the conduction state by changing the switch control signal 133 from the low level to the high level.
- the resonance circuit 118 is connected to the primary side of the transformer 120, and the resonance circuit 119 is not connected to the secondary side, as in the case of time t0 described above.
- the control unit 131 starts outputting the gate control signal 124 to each switching element 114 of the bridge circuit 112 at time t10.
- the operation of the bridge circuit 112 is started, and the bidirectional DC-DC converter 1 operates in mode 1, so that power conversion from the primary side to the secondary side of the transformer 120 is performed.
- a current flows from the DC power supply 100 to the DC power supply 101.
- control unit 131 controls the outputs of the switch control signals 132 and 133 and the gate control signal 124. As a result, it is possible to suppress abrupt current changes and voltage changes in the bidirectional DC-DC converter 1 at the time of mode switching, and to protect each component in the bidirectional DC-DC converter 1.
- FIG. 5 is a functional configuration diagram of the control unit 131.
- the control unit 131 has each functional block of the gate control signal generation unit 501 and the switch control signal generation unit 502 as its functions.
- the control unit 131 can realize these functional blocks by, for example, executing a predetermined program.
- the gate control signal generation unit 501 generates a gate control signal 124 based on the voltage and current of the DC power supplies 100 and 101 indicated by the sensor signals 123 from each sensor and the control command 134 input from the outside. At this time, the gate control signal generation unit 501 selects either mode 1 or mode 2 described above with reference to FIGS. 3 and 4 based on the sensor signal 123 and the control command 134. Then, the flow direction of the electric power between the DC power source 100 and the DC power source 101 is determined according to the selected control mode, and the gate control signal 124 is generated accordingly.
- the switch control signal generation unit 502 is a switch control signal 132 based on the voltage and current of the DC power supplies 100 and 101 indicated by the sensor signals 123 from each sensor and the gate control signal 124 generated by the gate control signal generation unit 501. , 133 is generated. Then, by outputting the generated switch control signals 132 and 133 to the bypass switches 116 and 117, respectively, the operation of the bypass switches 116 and 117 is controlled.
- the control unit 131 has the currents of the DC power supplies 100 and 101 detected by the current sensors 106 and 107 and the DC power supplies 100 and 101 detected by the voltage sensors 108 and 109, respectively, by the processing of each functional block described above. Based on the voltage and the control command 134 input from the outside, the flow direction of the power between the DC power supply 100 and the DC power supply 101 can be determined, and the gate control signal 124 and the switch control signals 132, 133 can be generated. can.
- FIG. 6 is a diagram showing an arrangement example of each component in the bidirectional DC-DC converter 1.
- each component of the converter circuit unit 130 that is, the voltage sensors 108 and 109, the smoothing capacitors 110 and 111, the bridge circuits 112 and 113, the bypass switches 116 and 117, and the resonance circuit are provided on the circuit board 600. It is configured to include 118, 119 and a transformer 120. Note that FIG. 6 omits the illustration of the current sensors 106 and 107.
- the circuit board 600 is electrically separated into a primary side (input side) and a secondary side (output side) by an insulating boundary line 601 formed by the transformer 120.
- the bypass switches 116, 117 and the resonance circuits 118, 119 are all arranged on the same board, but it is also possible to mount them on different boards. ..
- another board arranged in parallel at a predetermined distance from the circuit board 600 may be provided, and the bypass switches 116 and 117 may be mounted on this board. By doing so, it is possible to reduce the mounting space of each component in the bidirectional DC-DC converter 1 and reduce the size.
- the bidirectional DC-DC converter 1 is a DC-DC converter capable of bidirectionally converting DC power between a DC power supply 100 and a DC power supply 101.
- the bidirectional DC-DC converter 1 includes a transformer 120, a bridge circuit 112 that mutually converts DC power and AC power input / output between the DC power supply 100 and the primary side of the transformer 120, and a DC power supply 101.
- a bridge circuit 113 that mutually converts DC power and AC power input / output from the secondary side of the transformer 120, and a resonance circuit 118 that can be connected between the bridge circuit 112 and the primary side of the transformer 120.
- a resonance circuit 119 that can be connected between the bridge circuit 113 and the secondary side of the transformer 120, a bypass switch 116 that switches the connection state of the resonance circuit 118 between the bridge circuit 112 and the primary side of the transformer 120, and a bridge. It includes a bypass switch 117 that switches the connection state of the resonance circuit 119 between the circuit 113 and the secondary side of the transformer 120, and a control unit 131 that controls the bypass switch 116 and the bypass switch 117, respectively. Since this is done, LC resonance is performed on the primary side or the secondary side of the transformer 120 depending on the direction of the DC power input / output between the DC power supply 100 and the DC power supply 101 via the bidirectional DC-DC converter 1.
- a bidirectional DC-DC converter 1 capable of forming a circuit and performing power conversion using this LC resonance circuit can be realized. Therefore, it is possible to provide a bidirectional DC-DC converter having a high control stability by improving the range of the output voltage.
- the resonance circuit 118 and the resonance circuit 119 are configured by using capacitors C1 and C2 connected in series and inductors L1 and L2, respectively. Since this is done, the LC resonance circuit can be easily formed on the primary side or the secondary side of the transformer 120 by connecting the resonance circuits 118 and 119.
- the resonance circuit 118 is connected in parallel with the bypass switch 116 between the bridge circuit 112 and the primary side of the transformer 120.
- the bypass switch 116 is opened by the control unit 131, the bridge circuit 112 and the primary side of the transformer 120 are connected via the resonance circuit 118, and when the bypass switch 116 is conducted by the control unit 131, the bridge circuit The 112 and the primary side of the transformer 120 are connected without going through the resonance circuit 118.
- the resonance circuit 119 is connected in parallel with the bypass switch 117 between the bridge circuit 113 and the secondary side of the transformer 120.
- the bridge circuit 113 and the secondary side of the transformer 120 are connected via the resonance circuit 119, and when the bypass switch 117 is conducted by the control unit 131, the bridge is connected.
- the circuit 113 and the secondary side of the transformer 120 are connected without going through the resonance circuit 119. Since this is done, the connection states of the resonance circuits 118 and 119 between the bridge circuits 112 and 113 and the transformer 120 can be reliably switched by using the bypass switches 116 and 117, respectively.
- the control unit 131 converts the DC power flowing in the direction of the DC power supply 101 from the DC power supply 100 (in the case of mode 1), the control unit 131 opens the bypass switch 116 and conducts the bypass switch 117. It controls the bypass switch 116 and the bypass switch 117. Further, when converting the DC power flowing in the direction of the DC power supply 101 from the DC power supply 101 (in the case of mode 2), the bypass switch 116 and the bypass switch so as to conduct the bypass switch 116 and open the bypass switch 117. It controls 117. Since this is done, between the bridge circuits 112 and 113 and the transformer 120 depending on the direction of the DC power input / output between the DC power supply 100 and the DC power supply 101 via the bidirectional DC-DC converter 1. Switching control of the bypass switches 116 and 117 can be performed so that the connection states of the resonance circuits 118 and 119 are appropriate, respectively.
- the bidirectional DC-DC converter 1 includes a voltage sensor 108 that detects the voltage of the DC power supply 100, a current sensor 106 that detects the current flowing through the DC power supply 100, and a voltage sensor 109 that detects the voltage of the DC power supply 101. And a current sensor 107 for detecting the current flowing through the DC power supply 101.
- the control unit 131 has a DC power supply 100 and a DC power supply based on the voltage detected by the voltage sensors 108 and 109, the current detected by the current sensors 106 and 107, respectively, and the control command 134 input from the outside. Controls the direction of DC power between 101. Since this is done, the control unit 131 can appropriately control the direction of the DC power.
- the bypass switches 116 and 117 can be configured by using relays, respectively. By doing so, the bypass switches 116 and 117 having high environmental resistance and reliability can be realized at low cost.
- the bridge circuits 112 and 113 are respectively configured by using a half-bridge circuit or a full-bridge circuit. Since this is done, the bridge circuits 112 and 113 can be realized by any circuit configuration.
- the bidirectional DC-DC converter 1 starts the operation of the bridge circuit 113 when the output power from the bridge circuit 112 becomes less than a predetermined value after the operation of the bridge circuit 112 is stopped. Further, after the operation of the bridge circuit 113 is stopped, the operation of the bridge circuit 112 is started when the output power from the bridge circuit 113 becomes less than a predetermined value. Since this is done, it is possible to suppress abrupt current changes and voltage changes in the bidirectional DC-DC converter 1 and protect each component in the bidirectional DC-DC converter 1.
- FIG. 7 is a schematic configuration diagram of a bidirectional DC-DC converter according to a second embodiment of the present invention.
- the bidirectional DC-DC converter 1A shown in FIG. 7 is connected between the DC power supply 100 and the DC power supply 101, and is connected to the DC power supply 100, similarly to the bidirectional DC-DC converter 1 described in the first embodiment. It is a DC-DC converter capable of bidirectionally converting DC power between and a DC power supply 101.
- the difference between the bidirectional DC-DC converter 1A of the present embodiment and the bidirectional DC-DC converter 1 of the first embodiment is that the bypass path 301, in parallel with the resonant circuits 118 and 119 in the converter circuit unit 130, respectively. 302 is provided, and the bypass switches 116 and 117 are configured to be switchable between the resonant circuits 118 and 119 and the bypass paths 301 and 302, respectively.
- the bidirectional DC-DC converter 1 and the bidirectional DC-DC converter 1A are common.
- the resonance circuit 118 and the bypass path 301 are respectively connected between the bridge circuit 112 and the primary side of the transformer 120 via the bypass switch 116.
- the bypass switch 116 switches the connection destination on the primary side of the transformer 120 to either the resonance circuit 118 or the bypass path 301 according to the switch control signal 132 output from the control unit 131.
- the resonant circuit 119 and the bypass path 302 are respectively connected between the bridge circuit 113 and the secondary side of the transformer 120 via the bypass switch 117.
- the bypass switch 117 switches the connection destination on the secondary side of the transformer 120 to either the resonance circuit 119 or the bypass path 302.
- the primary side of the transformer 120 or An LC resonance circuit is formed on the secondary side, and a bidirectional DC-DC converter 1 capable of performing power conversion using this LC resonance circuit is realized.
- FIG. 8 is a table showing the switching state of the bypass switches 116 and 117 controlled by the control unit 131 in the bidirectional DC-DC converter according to the second embodiment of the present invention.
- columns 211 and 212 represent the states of the switch control signals 132 and 133, respectively
- columns 213 and 214 represent the switching states of the bypass switches 116 and 117, respectively.
- Column 215 represents the operation mode (direction in which power flows) of the bidirectional DC-DC converter 1A.
- the control unit 131 switches as shown in the table of FIG.
- the control signal 132 is output at "0", that is, at a low level
- the switch control signal 133 is output at "1", that is, at a high level.
- the bypass switch 116 (S1) is switched to the state connected to the resonance circuit 118 side
- the bypass switch 117 (S2) is switched to the state connected to the bypass path 302 side.
- the resonant circuit 118 is connected between the bridge circuit 112 and the primary side of the transformer 120, and an LC resonant circuit is formed on the primary side of the transformer 120.
- the control unit 131 performs the mode 1 operation by switching each switching element 114 of the bridge circuit 112 so that electric power flows in the forward direction through the LC resonance circuit.
- the control unit 131 when converting the DC power flowing in the direction (reverse direction) of the DC power supply 101 from the DC power supply 101, the control unit 131 sets the switch control signal 132 to "1", that is, a high level, as shown in the table of FIG. Is output, and the switch control signal 133 is output at "0", that is, at a low level.
- the bypass switch 116 (S1) is switched to the state connected to the bypass path 301 side
- the bypass switch 117 (S2) is switched to the state connected to the resonance circuit 119 side.
- the resonant circuit 119 is connected between the bridge circuit 113 and the secondary side of the transformer 120, and an LC resonant circuit is formed on the secondary side of the transformer 120.
- the control unit 131 performs the mode 2 operation by switching each switching element 114 of the bridge circuit 113 so that electric power flows in the opposite direction via the LC resonance circuit.
- control unit 131 controls the output of the switch control signals 132, 133 and the gate control signal 124 by the same procedure as in FIG. 4 described in the first embodiment. Thereby, the operation of the mode 1 in which the electric power flows in the forward direction and the operation in the mode 2 in which the electric power flows in the reverse direction can be alternately performed.
- the bidirectional DC-DC converter 1A includes a bypass path 301 provided in parallel with the resonance circuit 118.
- the resonance circuit 118 and the bypass path 301 are respectively connected between the bridge circuit 112 and the primary side of the transformer 120 via the bypass switch 116, and the bypass switch 116 connects the connection destination of the primary side of the transformer 120 to the resonance circuit. Switch to either 118 or bypass route 301.
- the bidirectional DC-DC converter 1A includes a bypass path 302 provided in parallel with the resonance circuit 119.
- the resonance circuit 119 and the bypass path 302 are respectively connected between the bridge circuit 113 and the secondary side of the transformer 120 via the bypass switch 117, and the bypass switch 117 connects the secondary side of the transformer 120 to the connection destination.
- bypass switches 116 and 117 are used to reliably switch the connection states of the resonance circuits 118 and 119 between the bridge circuits 112 and 113 and the transformer 120, respectively. be able to.
- the control unit 131 converts the DC power flowing in the direction of the DC power supply 101 from the DC power supply 100 (in the case of mode 1)
- the control unit 131 switches the connection destination on the primary side of the transformer 120 to the resonance circuit 118 and the transformer 120.
- the bypass switch 116 and the bypass switch 117 are controlled so as to switch the connection destination on the secondary side of the above to the bypass path 302.
- the connection destination on the primary side of the transformer 120 is switched to the bypass path 301 and the secondary side of the transformer 120 is switched.
- the bypass switch 116 and the bypass switch 117 are controlled so that the connection destination is switched to the resonance circuit 119.
- the bridge circuit 112 depends on the direction of the DC power input / output between the DC power supply 100 and the DC power supply 101 via the bidirectional DC-DC converter 1A. , 113, and the bypass switches 116 and 117 can be switched and controlled so that the connection states of the resonance circuits 118 and 119 between the transformer 120 and the transformer 120 are appropriate, respectively.
- FIG. 9 is a schematic configuration diagram of a bidirectional DC-DC converter according to a third embodiment of the present invention.
- the bidirectional DC-DC converter 1B shown in FIG. 9 is connected between the DC power supply 100 and the DC power supply 101, and is connected to the DC power supply 100, similarly to the bidirectional DC-DC converter 1 described in the first embodiment. It is a DC-DC converter capable of bidirectionally converting DC power between and a DC power supply 101.
- the difference between the bidirectional DC-DC converter 1B of the present embodiment and the bidirectional DC-DC converter 1 of the first embodiment is that the resonant circuits 118 and 119 have inductors L1 and L2 in the converter circuit unit 130, respectively.
- the resonance circuits 118 and 119 are configured by using the leakage magnetic fluxes Lp and Ls existing on the primary side and the secondary side of the transformer 120 instead.
- the bidirectional DC-DC converter 1 and the bidirectional DC-DC converter 1B are common.
- the capacitor C1 constituting the resonance circuit 118 is connected in parallel with the bypass switch 116 between the bridge circuit 112 and the primary side of the transformer 120.
- the bypass switch 116 is opened by the control unit 131, the bridge circuit 112 and the primary side of the transformer 120 are connected via the capacitor C1, and the leakage flux Lp of the capacitor C1 and the transformer 120 causes the transformer 120 to be connected.
- An LC resonant circuit is formed on the primary side.
- the bypass switch 116 is conducted by the control unit 131, the bridge circuit 112 and the primary side of the transformer 120 are connected without passing through the capacitor C1, so that an LC resonance circuit is provided on the primary side of the transformer 120. Not formed.
- the capacitor C2 constituting the resonance circuit 119 is connected in parallel with the bypass switch 117 between the bridge circuit 113 and the secondary side of the transformer 120.
- the bypass switch 117 is opened by the control unit 131, the bridge circuit 113 and the secondary side of the transformer 120 are connected via the capacitor C2, and the capacitor C2 and the leakage flux Ls of the transformer 120 cause the transformer 120.
- An LC resonant circuit is formed on the secondary side of the.
- the bypass switch 117 is conducted by the control unit 131, the bridge circuit 113 and the primary side of the transformer 120 are connected without passing through the capacitor C2, so that the LC resonance circuit is connected to the secondary side of the transformer 120. Is not formed.
- control unit 131 controls the output of the switch control signals 132, 133 and the gate control signal 124 by the same procedure as in FIG. 4 described in the first embodiment. Thereby, the operation of the mode 1 in which the electric power flows in the forward direction and the operation in the mode 2 in which the electric power flows in the reverse direction can be alternately performed.
- the resonant circuit 118 is configured by using the leakage magnetic flux Lp on the primary side of the transformer 120 and the capacitor C1, and the resonant circuit 119. Is configured by using the leakage magnetic flux Ls on the secondary side of the transformer 120 and the capacitor C2. Since this is done, the resonant circuits 118 and 119 can be configured without using the inductors L1 and L2.
- FIG. 10 is a schematic configuration diagram of a bidirectional DC-DC converter according to a fourth embodiment of the present invention.
- the bidirectional DC-DC converter 1C shown in FIG. 10 is connected between the DC power supply 100 and the DC power supply 101, similarly to the bidirectional DC-DC converter 1 described in the first embodiment, and is connected to the DC power supply 100. It is a DC-DC converter capable of bidirectionally converting DC power between and a DC power supply 101.
- the bidirectional DC-DC converter 1C of the present embodiment combines the features of the bidirectional DC-DC converters 1A and 1B described in the second and third embodiments, respectively. That is, in the converter circuit unit 130, bypass paths 301 and 302 are provided in parallel with the capacitors C1 and C2 of the resonance circuits 118 and 119, respectively, and the bypass switches 116 and 117 form the capacitors C1 and C2 and the bypass paths 301 and 302. It is configured to be switchable between. Further, the resonant circuits 118 and 119 do not have the inductors L1 and L2, respectively, and the leakage fluxes Lp and Ls existing on the primary side and the secondary side of the transformer 120 are used instead to configure the resonant circuits 118 and 119. is doing.
- control unit 131 controls the output of the switch control signals 132, 133 and the gate control signal 124 by the same procedure as in FIG. 4 described in the first embodiment. Thereby, the operation of the mode 1 in which the electric power flows in the forward direction and the operation in the mode 2 in which the electric power flows in the reverse direction can be alternately performed.
- one or both of the current sensors 106 and 107 are not connected between the DC power supplies 100 and 101 and the bridge circuits 112 and 113, but the bridge circuits 112 and 113. It may be installed between the transformer 120 and the transformer 120. Alternatively, the current sensors 106 and 107 may be installed both between the DC power supplies 100 and 101 and the bridge circuits 112 and 113 and between the bridge circuits 112 and 113 and the transformer 120. In this way, the current sensors 106 and 107 can detect the currents flowing between the bridge circuits 112 and 113 and the primary side and the secondary side of the transformer 120, respectively. Then, based on these current detection results, the control unit 131 generates the gate control signal 124 and the switch control signals 132, 133, so that the direction of the DC power can be appropriately controlled.
- the present invention is not limited to the above-described embodiments and modifications, and various modifications can be made without departing from the spirit of the present invention.
- the above embodiment is for explaining the present invention in an easy-to-understand manner, and does not necessarily include all the components. Any component can be added, deleted, or replaced without departing from the present invention.
- 1,1A, 1B, 1C Bidirectional DC-DC converter
- 102,104 Positive terminal
- 106,107 Current sensor
- 108,109 Voltage sensor
- 114 switching element
- 118, 119 resonance circuit
- 130 Converter circuit unit
- 134 Control command
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Abstract
Description
図1は、本発明の第1の実施形態に係る双方向DC-DCコンバータの概略構成図である。図1に示す双方向DC-DCコンバータ1は、直流電源100と直流電源101の間に接続されており、直流電源100と直流電源101の間で直流電力を双方向に電力変換可能なDC-DCコンバータである。すなわち、直流電源100から直流電源101の方向に電力が流れる場合は、直流電源100から出力された直流電力が双方向DC-DCコンバータ1において電力変換され、直流電源101に入力される。その際、直流電源100は電力源として動作し、直流電源101は負荷として動作する。反対に、直流電源101から直流電源100の方向に電力が流れる場合は、直流電源101から出力された直流電力が双方向DC-DCコンバータ1において電力変換され、直流電源100に入力される。その際、直流電源101は電力源として動作し、直流電源100は負荷として動作する。
図7は、本発明の第2の実施形態に係る双方向DC-DCコンバータの概略構成図である。図7に示す双方向DC-DCコンバータ1Aは、第1の実施形態で説明した双方向DC-DCコンバータ1と同様に、直流電源100と直流電源101の間に接続されており、直流電源100と直流電源101の間で直流電力を双方向に電力変換可能なDC-DCコンバータである。
図9は、本発明の第3の実施形態に係る双方向DC-DCコンバータの概略構成図である。図9に示す双方向DC-DCコンバータ1Bは、第1の実施形態で説明した双方向DC-DCコンバータ1と同様に、直流電源100と直流電源101の間に接続されており、直流電源100と直流電源101の間で直流電力を双方向に電力変換可能なDC-DCコンバータである。
図10は、本発明の第4の実施形態に係る双方向DC-DCコンバータの概略構成図である。図10に示す双方向DC-DCコンバータ1Cは、第1の実施形態で説明した双方向DC-DCコンバータ1と同様に、直流電源100と直流電源101の間に接続されており、直流電源100と直流電源101の間で直流電力を双方向に電力変換可能なDC-DCコンバータである。
Claims (19)
- 第1の直流電源と第2の直流電源との間で直流電力を双方向に電力変換可能なDC-DCコンバータであって、
トランスと、
前記第1の直流電源と前記トランスの一次側との間で入出力される直流電力と交流電力とを相互に変換する第1のブリッジ回路と、
前記第2の直流電源と前記トランスの二次側との間で入出力される直流電力と交流電力とを相互に変換する第2のブリッジ回路と、
前記第1のブリッジ回路と前記トランスの一次側との間に接続可能な第1の共振回路と、
前記第2のブリッジ回路と前記トランスの二次側との間に接続可能な第2の共振回路と、
前記第1のブリッジ回路と前記トランスの一次側との間における前記第1の共振回路の接続状態を切り替える第1のバイパススイッチと、
前記第2のブリッジ回路と前記トランスの二次側との間における前記第2の共振回路の接続状態を切り替える第2のバイパススイッチと、
前記第1のバイパススイッチおよび前記第2のバイパススイッチをそれぞれ制御する制御部と、を備える双方向DC-DCコンバータ。 - 請求項1に記載の双方向DC-DCコンバータにおいて、
前記第1の共振回路および前記第2の共振回路は、直列接続されたコンデンサとインダクタを用いてそれぞれ構成される双方向DC-DCコンバータ。 - 請求項2に記載の双方向DC-DCコンバータにおいて、
前記第1の共振回路は、前記第1のブリッジ回路と前記トランスの一次側との間に前記第1のバイパススイッチと並列に接続されており、
前記制御部により前記第1のバイパススイッチが開放されると、前記第1のブリッジ回路と前記トランスの一次側との間が前記第1の共振回路を介して接続され、
前記制御部により前記第1のバイパススイッチが導通されると、前記第1のブリッジ回路と前記トランスの一次側との間が前記第1の共振回路を介さずに接続される双方向DC-DCコンバータ。 - 請求項3に記載の双方向DC-DCコンバータにおいて、
前記第2の共振回路は、前記第2のブリッジ回路と前記トランスの二次側との間に前記第2のバイパススイッチと並列に接続されており、
前記制御部により前記第2のバイパススイッチが開放されると、前記第2のブリッジ回路と前記トランスの二次側との間が前記第2の共振回路を介して接続され、
前記制御部により前記第2のバイパススイッチが導通されると、前記第2のブリッジ回路と前記トランスの二次側との間が前記第2の共振回路を介さずに接続される双方向DC-DCコンバータ。 - 請求項2に記載の双方向DC-DCコンバータにおいて、
前記第1の共振回路と並列に設けられた第1のバイパス経路を備え、
前記第1の共振回路および前記第1のバイパス経路は、前記第1のブリッジ回路と前記トランスの一次側との間に前記第1のバイパススイッチを介してそれぞれ接続されており、
前記第1のバイパススイッチは、前記トランスの一次側の接続先を前記第1の共振回路または前記第1のバイパス経路のいずれかに切り替える双方向DC-DCコンバータ。 - 請求項5に記載の双方向DC-DCコンバータにおいて、
前記第2の共振回路と並列に設けられた第2のバイパス経路を備え、
前記第2の共振回路および前記第2のバイパス経路は、前記第2のブリッジ回路と前記トランスの二次側との間に前記第2のバイパススイッチを介してそれぞれ接続されており、
前記第2のバイパススイッチは、前記トランスの二次側の接続先を前記第2の共振回路または前記第2のバイパス経路のいずれかに切り替える双方向DC-DCコンバータ。 - 請求項1に記載の双方向DC-DCコンバータにおいて、
前記第1の共振回路は、前記トランスの一次側の漏れ磁束と第1のコンデンサを用いて構成され、
前記第2の共振回路は、前記トランスの二次側の漏れ磁束と第2のコンデンサを用いて構成される双方向DC-DCコンバータ。 - 請求項7に記載の双方向DC-DCコンバータにおいて、
前記第1のコンデンサは、前記第1のブリッジ回路と前記トランスの一次側との間に前記第1のバイパススイッチと並列に接続されており、
前記制御部により前記第1のバイパススイッチが開放されると、前記第1のブリッジ回路と前記トランスの一次側との間が前記第1のコンデンサを介して接続され、
前記制御部により前記第1のバイパススイッチが導通されると、前記第1のブリッジ回路と前記トランスの一次側との間が前記第1のコンデンサを介さずに接続される双方向DC-DCコンバータ。 - 請求項8に記載の双方向DC-DCコンバータにおいて、
前記第2のコンデンサは、前記第2のブリッジ回路と前記トランスの二次側との間に前記第2のバイパススイッチと並列に接続されており、
前記制御部により前記第2のバイパススイッチが開放されると、前記第2のブリッジ回路と前記トランスの二次側との間が前記第2のコンデンサを介して接続され、
前記制御部により前記第2のバイパススイッチが導通されると、前記第2のブリッジ回路と前記トランスの二次側との間が前記第2のコンデンサを介さずに接続される双方向DC-DCコンバータ。 - 請求項7に記載の双方向DC-DCコンバータにおいて、
前記第1のコンデンサと並列に設けられた第1のバイパス経路を備え、
前記第1のコンデンサおよび前記第1のバイパス経路は、前記第1のブリッジ回路と前記トランスの一次側との間に前記第1のバイパススイッチを介してそれぞれ接続されており、
前記第1のバイパススイッチは、前記トランスの一次側の接続先を前記第1のコンデンサまたは前記第1のバイパス経路のいずれかに切り替える双方向DC-DCコンバータ。 - 請求項10に記載の双方向DC-DCコンバータにおいて、
前記第2のコンデンサと並列に設けられた第2のバイパス経路を備え、
前記第2のコンデンサおよび前記第2のバイパス経路は、前記第2のブリッジ回路と前記トランスの二次側との間に前記第2のバイパススイッチを介してそれぞれ接続されており、
前記第2のバイパススイッチは、前記トランスの二次側の接続先を前記第2のコンデンサまたは前記第2のバイパス経路のいずれかに切り替える双方向DC-DCコンバータ。 - 請求項4または9に記載の双方向DC-DCコンバータにおいて、
前記制御部は、
前記第1の直流電源から前記第2の直流電源の方向に流れる直流電力の変換を行う場合は、前記第1のバイパススイッチを開放させるとともに前記第2のバイパススイッチを導通させるように、前記第1のバイパススイッチおよび前記第2のバイパススイッチを制御し、
前記第2の直流電源から前記第1の直流電源の方向に流れる直流電力の変換を行う場合は、前記第1のバイパススイッチを導通させるとともに前記第2のバイパススイッチを開放させるように、前記第1のバイパススイッチおよび前記第2のバイパススイッチを制御する双方向DC-DCコンバータ。 - 請求項6に記載の双方向DC-DCコンバータにおいて、
前記制御部は、
前記第1の直流電源から前記第2の直流電源の方向に流れる直流電力の変換を行う場合は、前記トランスの一次側の接続先を前記第1の共振回路に切り替えるとともに前記トランスの二次側の接続先を前記第2のバイパス経路に切り替えるように、前記第1のバイパススイッチおよび前記第2のバイパススイッチを制御し、
前記第2の直流電源から前記第1の直流電源の方向に流れる直流電力の変換を行う場合は、前記トランスの一次側の接続先を前記第1のバイパス経路に切り替えるとともに前記トランスの二次側の接続先を前記第2の共振回路に切り替えるように、前記第1のバイパススイッチおよび前記第2のバイパススイッチを制御する双方向DC-DCコンバータ。 - 請求項11に記載の双方向DC-DCコンバータにおいて、
前記制御部は、
前記第1の直流電源から前記第2の直流電源の方向に流れる直流電力の変換を行う場合は、前記トランスの一次側の接続先を前記第1のコンデンサに切り替えるとともに前記トランスの二次側の接続先を前記第2のバイパス経路に切り替えるように、前記第1のバイパススイッチおよび前記第2のバイパススイッチを制御し、
前記第2の直流電源から前記第1の直流電源の方向に流れる直流電力の変換を行う場合は、前記トランスの一次側の接続先を前記第1のバイパス経路に切り替えるとともに前記トランスの二次側の接続先を前記第2のコンデンサに切り替えるように、前記第1のバイパススイッチおよび前記第2のバイパススイッチを制御する双方向DC-DCコンバータ。 - 請求項1に記載の双方向DC-DCコンバータにおいて、
前記第1の直流電源の電圧を検出する第1の電圧センサと、
前記第1の直流電源に流れる電流、および/または、前記第1のブリッジ回路と前記トランスの一次側との間に流れる電流を検出する第1の電流センサと、
前記第2の直流電源の電圧を検出する第2の電圧センサと、
前記第2の直流電源に流れる電流、および/または、前記第2のブリッジ回路と前記トランスの二次側との間に流れる電流を検出する第2の電流センサと、を備え、
前記制御部は、前記第1の電圧センサおよび前記第2の電圧センサでそれぞれ検出された電圧と、前記第1の電流センサおよび前記第2の電流センサでそれぞれ検出された電流と、外部から入力される制御指令とに基づいて、前記直流電力の方向を制御する双方向DC-DCコンバータ。 - 請求項1に記載の双方向DC-DCコンバータにおいて、
前記第1のバイパススイッチおよび前記第2のバイパススイッチは、リレーを用いてそれぞれ構成される双方向DC-DCコンバータ。 - 請求項1に記載の双方向DC-DCコンバータにおいて、
前記第1のブリッジ回路および前記第2のブリッジ回路は、ハーフブリッジ回路またはフルブリッジ回路を用いてそれぞれ構成される双方向DC-DCコンバータ。 - 請求項1に記載の双方向DC-DCコンバータにおいて、
前記第1の共振回路および前記第2の共振回路は、第1の回路基板に搭載されており、
前記第1のバイパススイッチおよび前記第2のバイパススイッチは、第2の回路基板に搭載されており、
前記第1の回路基板と前記第2の回路基板とは、所定の間隔を離して互いに平行に配置される双方向DC-DCコンバータ。 - 請求項1に記載の双方向DC-DCコンバータにおいて、
前記第1のブリッジ回路の動作を停止した後、前記第1のブリッジ回路からの出力電力が所定値未満となったときに、前記第2のブリッジ回路の動作を開始し、
前記第2のブリッジ回路の動作を停止した後、前記第2のブリッジ回路からの出力電力が前記所定値未満となったときに、前記第1のブリッジ回路の動作を開始する双方向DC-DCコンバータ。
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| EP21855807.0A EP4160897A4 (en) | 2020-08-13 | 2021-06-02 | BIDIRECTIONAL DC-DC CONVERTER |
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| JP7868944B2 (ja) * | 2022-12-14 | 2026-06-02 | ニチコン株式会社 | 蓄電システム |
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| US20240039416A1 (en) | 2024-02-01 |
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| EP4160897A1 (en) | 2023-04-05 |
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