WO2016038967A1 - Dispositif de conversion d'énergie - Google Patents

Dispositif de conversion d'énergie Download PDF

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Publication number
WO2016038967A1
WO2016038967A1 PCT/JP2015/067955 JP2015067955W WO2016038967A1 WO 2016038967 A1 WO2016038967 A1 WO 2016038967A1 JP 2015067955 W JP2015067955 W JP 2015067955W WO 2016038967 A1 WO2016038967 A1 WO 2016038967A1
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Prior art keywords
arm
switch element
input
output port
inductor
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PCT/JP2015/067955
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English (en)
Japanese (ja)
Inventor
鵜野良之
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株式会社村田製作所
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Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to JP2016547734A priority Critical patent/JP6202212B2/ja
Priority to CN201580047393.4A priority patent/CN106605357B/zh
Priority to DE112015004158.3T priority patent/DE112015004158T5/de
Publication of WO2016038967A1 publication Critical patent/WO2016038967A1/fr

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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
    • H02M3/337—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 in push-pull configuration
    • H02M3/3376—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 in push-pull configuration with automatic control of output voltage or current
    • 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
    • H02M1/0048—Circuits or arrangements for reducing losses
    • 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 power conversion apparatus that performs power conversion between arbitrary input / output ports among a plurality of input / output ports.
  • Patent Document 1 discloses a power conversion circuit that performs power conversion between any two of the four input / output ports.
  • the power conversion circuit includes a primary side conversion circuit having two input / output ports, and a secondary side conversion circuit magnetically coupled to the primary side conversion circuit and having two other input / output ports.
  • the primary side conversion circuit and the secondary side conversion circuit are magnetically coupled by a center tap type transformer.
  • the primary side conversion circuit has a primary side full bridge circuit.
  • the primary side full bridge circuit has a coupled inductor configured by magnetically coupling two inductors connected to both ends of the primary side coil of the transformer.
  • the secondary conversion circuit has a secondary full bridge circuit.
  • the secondary full bridge circuit has a coupled inductor configured by magnetically coupling two inductors connected to both ends of the secondary coil of the transformer.
  • the power conversion ratio of a primary side converter circuit and a secondary side converter circuit is changed by changing the ON time of a switching period. The amount of power transmission between the primary side conversion circuit and the secondary side conversion circuit is controlled by the phase difference of the switching period.
  • an object of the present invention is to provide a power conversion device that can suppress loss during power transmission and perform power transmission efficiently.
  • the power conversion device of the present invention includes a first input / output port, a second input / output port, a first arm and a second arm in which an upper switch element and a lower switch element are connected in series, and the first arm And a first full bridge circuit in which the second arm is connected to the first input / output port, a third arm and a fourth arm in which an upper switch element and a lower switch element are connected in series, A secondary full bridge circuit in which the third arm and the fourth arm are connected to the second input / output port; a transformer having a primary coil and a secondary coil; and a first end of the primary coil A first inductor connected to one end, a second end connected to a connection point of the upper switch element and the lower switch element of the first arm, and a first end a second end of the primary coil.
  • the second end is A second inductor connected to a connection point of the upper switch element and the lower switch element of two arms, a first end connected to a first end of the secondary coil, and a second end connected to the third arm
  • a third inductor connected to a connection point of the upper switch element and the lower switch element, a first end connected to a second end of the secondary coil, and a second end connected to the second arm of the fourth arm.
  • a fifth inductor connected between the center tap of the primary coil and the third input / output port; and a sixth inductor connected between the center tap of the secondary coil and the fourth input / output port. It is preferable to include at least one of the inductors.
  • the power transmission amount of the primary side conversion circuit or the secondary side conversion circuit can be adjusted.
  • the power conversion device of the present invention includes a first input / output port, a second input / output port, a first arm and a second arm in which an upper switch element and a lower switch element are connected in series, and the first arm And a first full bridge circuit in which the second arm is connected to the first input / output port, a third arm and a fourth arm in which an upper switch element and a lower switch element are connected in series, A secondary full bridge circuit in which a third arm and the fourth arm are connected to the second input / output port; a transformer having a primary coil and a secondary coil; and a first end of the first arm A third inductor is connected to a connection point of the upper switch element and the lower switch element, a second end is connected to a first end of the secondary coil, and a first end is the upper side of the second arm.
  • Switch element and above A second inductor connected to a connection point of the switch element, a second end connected to a second end of the secondary coil, a third input / output port connected to a center tap of the primary coil, and the 2 A fourth input / output port connected to the center tap of the secondary coil, a fifth inductor connected between the center tap of the primary coil and the third input / output port, the first arm and the second A first switching control unit that alternately turns on and off the upper switch element of the arm and the lower switch element, the upper switch element of the third arm and the fourth arm, and the lower switch element alternately A second switching control unit that turns on and off at the same time, and the turn-on and turn-off timings of the upper switch elements of the first arm and the second arm are simultaneously And an operation mode in which turn-on and turn-off timings of the lower switch elements of the first arm and the second arm are simultaneous, and turn-on and turn-off of the upper switch elements of the third arm and the fourth arm. And the operation mode in which the turn-on and
  • a sixth inductor connected between the center tap of the secondary coil and the fourth input / output port is provided.
  • the power conversion device of the present invention includes a first input / output port, a second input / output port, a first arm and a second arm in which an upper switch element and a lower switch element are connected in series, and the first arm And a first full bridge circuit in which the second arm is connected to the first input / output port, a third arm and a fourth arm in which an upper switch element and a lower switch element are connected in series, A secondary full bridge circuit in which a third arm and the fourth arm are connected to the second input / output port; a transformer having a primary coil and a secondary coil; and a first end of the first arm A first inductor connected to a connection point of the upper switch element and the lower switch element, a second end connected to a first end of the primary coil, and a first end connected to the upper side of the second arm Switch element and above A second inductor having a second end connected to a connection point of the switch element and having a second end connected to a second end of the primary coil; a third input / output
  • At least one of the first inductor, the second inductor, the third inductor, and the fourth inductor is magnetically coupled.
  • the power conversion device of the present invention includes a first input / output port, a second input / output port, a first arm and a second arm in which an upper switch element and a lower switch element are connected in series, and the first arm And a first full bridge circuit in which the second arm is connected to the first input / output port, a third arm and a fourth arm in which an upper switch element and a lower switch element are connected in series, A secondary full bridge circuit in which a third arm and the fourth arm are connected to the second input / output port; a transformer having a primary coil and a secondary coil; and a first end of the first arm A third inductor connected to a connection point of the upper switch element and the lower switch element, a second inductor connected to a first end of the secondary coil, and a second inductor connected to a center tap of the primary coil.
  • a fifth inductor connected between a center tap of the primary coil and the third input / output port, the upper switch element of the first arm and the second arm, and the lower switch element, A first switching control unit that alternately turns on and off, and a second switching control unit that alternately turns on and off the upper switch element and the lower switch element of the third arm and the fourth arm, and
  • the turn-on and turn-off timings of the upper switch elements of the first arm and the second arm are simultaneous, and the turn-on and turn-off timings of the lower switch elements of the first arm and the second arm are simultaneous. It has an operation mode.
  • the upper switch element and the lower switch element of the first arm, the second arm, the third arm, and the fourth arm are MOS-FETs having body diodes, and the first switching control unit is configured to perform the operation A first prohibiting unit that prohibits turning on the upper switch element or the lower switch element of the first arm and the second arm in the mode, and the second switching control unit is configured to It is preferable to have a second prohibition unit that prohibits the upper switch element or the lower switch element of the third arm and the fourth arm from being turned on.
  • the power conversion device of the present invention includes the upper switch element of the first arm and the lower switch element of the second arm, the lower switch element of the first arm, and the upper switch element of the second arm.
  • a third switching control unit that alternately turns on and off; the upper switch element of the third arm; the lower switch element of the fourth arm; and the lower switch element and the fourth arm of the third arm.
  • a fourth switching control unit for alternately turning on and off the upper switch element, a switching control mode by the first switching control unit and the second switching control unit, the third switching control unit and the fourth switching control unit It is preferable to include a switching unit that alternately switches between the switching control modes according to.
  • the power transmission in the insulation direction can be efficiently performed by alternately switching the mode in which power is transmitted in the insulation direction (from the primary side to the secondary side or vice versa) and the mode in which the power is not transmitted.
  • efficient power transmission can be performed while suppressing loss during power transmission.
  • FIG. 1 is a circuit diagram of a power conversion device according to a first embodiment.
  • Block diagram showing functions of control unit The figure for demonstrating the function as a buck-boost circuit among the functions of the converter circuit of a power converter device.
  • the figure for demonstrating the function as a DAB converter among the converter circuit functions of a power converter device The figure which shows the voltage waveform of each part of a primary side converter circuit and a secondary side converter circuit, and the current waveform which flows into an inductor
  • the timing chart of each switch element of a primary side conversion circuit, and the figure which shows the voltage waveform of each part of a primary side conversion circuit The timing chart of each switch element of a secondary side conversion circuit, and the figure which shows the voltage waveform of each part of a secondary side conversion circuit
  • Circuit diagram of modification of power converter Circuit diagram of modification of power converter Circuit diagram of modification of power converter Circuit diagram of modification of power converter Circuit diagram of modification of power converter Circuit diagram of modification of power converter Circuit diagram of modification of power converter
  • FIG. 1 is a circuit diagram of a power conversion device 1 according to this embodiment.
  • the power conversion device 1 includes a primary side conversion circuit 10 and a secondary side conversion circuit 20.
  • the primary side conversion circuit 10 and the secondary side conversion circuit 20 are magnetically coupled by a transformer 30.
  • the primary side conversion circuit 10 includes a first input / output port P1 having input / output terminals IO1 and IO2, and a third input / output port P3 having input / output terminals IO2 and IO3.
  • the secondary side conversion circuit 20 includes a second input / output port P2 having input / output terminals IO4 and IO5, and a fourth input / output port P4 having input / output terminals IO5 and IO6.
  • the power conversion device 1 performs power conversion between any of the four input / output ports P1 to P4 and another input / output port.
  • the primary side conversion circuit 10 includes a primary side full bridge circuit (hereinafter simply referred to as a full bridge circuit).
  • This full bridge circuit has switch elements Q11, Q12, Q13, and Q14.
  • the switch elements Q11, Q12, Q13, Q14 are n-type MOS-FETs.
  • a series circuit of the switch elements Q11 and Q12 is connected to the input / output terminals IO1 and IO2.
  • the series circuit of the switch elements Q13 and Q14 is connected in parallel to the series circuit of the switch elements Q11 and Q12.
  • a gate signal is input from the primary driver 13 to the gates of the switch elements Q11, Q12, Q13, and Q14. Thereby, each switch element Q11, Q12, Q13, Q14 is turned on and off.
  • the series circuit of the switch elements Q11 and Q12 is an example of the “first arm” in the present invention.
  • the series circuit of the switch elements Q13 and Q14 is an example of the “second arm” in the present invention.
  • the switch elements Q11 and Q13 are examples of the “upper switch element” in the present invention.
  • the switch elements Q12 and Q14 are examples of the “lower switch element” in the present invention.
  • the first end of the inductor L11 is connected to the connection point of the switch elements Q11 and Q12.
  • the first end of the inductor L12 is connected to the connection point of the switch elements Q13 and Q14 of the full bridge circuit.
  • the second ends of the inductors L11 and L12 are connected to both ends of the primary coil of the transformer 30.
  • the inductors L11 and L12 are coupled inductors that are magnetically coupled.
  • the inductors L11 and L12 are examples of the “first inductor” and the “second inductor” in the present invention.
  • the transformer 30 includes primary coils 31 and 32 and secondary coils 33 and 34.
  • the primary coils 31 and 32 are connected in series.
  • the input / output terminal IO3 of the third input / output port P3 is connected to the connection point (center tap) of the primary coils 31 and 32.
  • the secondary side conversion circuit 20 includes a secondary side full bridge circuit (hereinafter simply referred to as a full bridge circuit).
  • This full bridge circuit has switch elements Q21, Q22, Q23, and Q24.
  • the switch elements Q21, Q22, Q23, Q24 are n-type MOS-FETs.
  • a series circuit of the switch elements Q21 and Q22 is connected to the input / output terminals IO4 and IO5.
  • the series circuit of the switch elements Q23 and Q24 is connected in parallel to the series circuit of the switch elements Q21 and Q22.
  • a gate signal is input from the secondary driver 23 to the gates of the switch elements Q21, Q22, Q23, and Q24. Thereby, each switch element Q21, Q22, Q23, Q24 is turned on / off.
  • the series circuit of the switch elements Q21 and Q22 is an example of the “third arm” in the present invention.
  • the series circuit of the switch elements Q23 and Q24 is an example of the “fourth arm” in the present invention.
  • the switch elements Q21 and Q22 are examples of the “upper switch element” in the present invention.
  • the switch elements Q22 and Q24 are an example of the “lower switch element” in the present invention.
  • the first end of the inductor L21 is connected to the connection point of the switch elements Q21 and Q22.
  • the first end of the inductor L22 is connected to the connection point of the switch elements Q23 and Q24 of the full bridge circuit.
  • the second ends of the inductors L21 and L22 are connected to both ends of the secondary coil of the transformer 30.
  • the inductors L21 and L22 are coupled inductors that are magnetically coupled.
  • the inductors L21 and L22 are examples of the “third inductor” and the “fourth inductor” in the present invention.
  • the secondary coils 33 and 34 of the transformer 30 are connected in series.
  • An input / output terminal IO6 of the fourth input / output port P4 is connected to a connection point (center tap) of the secondary coils 33 and 34.
  • the power conversion apparatus 1 includes a control unit 35.
  • the control unit 35 outputs a control signal to each of the primary side driver 13 and the secondary side driver 23.
  • the primary side driver 13 and the secondary side driver 23 to which this control signal is input outputs a gate signal to each switch element.
  • FIG. 2 is a block diagram showing the function of the control unit 35.
  • the control unit 35 includes a power conversion mode determination unit 351, a phase difference determination unit 352, a duty ratio determination unit 353, a primary side output unit 354, and a secondary side output unit 355.
  • the power conversion mode determination unit 351 determines the power conversion mode of the power conversion device 1 based on, for example, an external signal input to the control unit 35.
  • the power conversion mode includes first to twelfth modes.
  • the first mode is a mode in which power input from the first input / output port P1 is converted and output to the third input / output port P3.
  • the second mode is a mode in which power input from the first input / output port P1 is converted and output to the second input / output port P2.
  • the third mode is a mode in which the power input from the first input / output port P1 is converted and output to the fourth input / output port P4.
  • the fourth mode is a mode in which power input from the third input / output port P3 is converted and output to the first input / output port P1.
  • the fifth mode is a mode in which the power input from the third input / output port P3 is converted and output to the second input / output port P2.
  • the sixth mode is a mode in which power input from the third input / output port P3 is converted and output to the fourth input / output port P4.
  • the seventh mode is a mode in which power input from the second input / output port P2 is converted and output to the first input / output port P1.
  • the eighth mode is a mode in which power input from the second input / output port P2 is converted and output to the third input / output port P3.
  • the ninth mode is a mode in which the power input from the second input / output port P2 is converted and output to the fourth input / output port P4.
  • the tenth mode is a mode in which power input from the fourth input / output port P4 is converted and output to the first input / output port P1.
  • the eleventh mode is a mode in which power input from the fourth input / output port P4 is converted and output to the third input / output port P3.
  • the twelfth mode is a mode in which power input from the fourth input / output port P4 is converted and output to the second input / output port P2.
  • the phase difference determination unit 352 determines the phase difference ⁇ of the switching cycle of the switch elements included in the primary side conversion circuit 10 and the secondary side conversion circuit 20 according to the mode determined by the power conversion mode determination unit 351. Power is transmitted from the first input / output port P1 to the second input / output port P2 (or in the opposite direction) by the determined phase difference ⁇ .
  • the duty ratio determination unit 353 determines the duty ratio of the switch element included in each of the primary side conversion circuit 10 and the secondary side conversion circuit 20 according to the determined mode.
  • the voltage is controlled (stepped up or stepped down) in each of the primary side converter circuit 10 and the secondary side converter circuit 20 according to the determined duty ratio.
  • the primary side output unit 354 sends the gate signal to the gates of the switch elements Q11, Q12, Q13, and Q14 of the primary side conversion circuit 10 based on the mode determined by the power conversion mode determination unit 351. 13 to output. Thereby, each switch element Q11, Q12, Q13, Q14 is turned on and off.
  • the primary side output unit 354 outputs a gate signal corresponding to the phase difference ⁇ and the duty ratio determined by the phase difference determination unit 352 and the duty ratio determination unit 353.
  • the primary side output unit 354 is an example of the “first switching control unit” in the present invention.
  • the secondary output unit 355 sends the gate signal to the gates of the switch elements Q21, Q22, Q23, and Q24 of the secondary conversion circuit 20 based on the mode determined by the power conversion mode determination unit 351. 23 to output. Thereby, each switch element Q21, Q22, Q23, Q24 is turned on / off.
  • the secondary output unit 355 outputs a gate signal corresponding to the phase difference ⁇ and the duty ratio determined by the phase difference determination unit 352 and the duty ratio determination unit 353.
  • the secondary side output unit 355 is an example of the “second switching control unit” in the present invention.
  • the power converter 1 has a function as a step-up / step-down circuit and a function as a Dual Active Bridge (hereinafter DAB) converter circuit.
  • DAB Dual Active Bridge
  • FIG. 3 is a diagram for explaining a function as a step-up / step-down circuit among the functions of the converter circuit of the power conversion device 1.
  • FIG. 4 is a diagram for explaining a function as a DAB converter among the converter circuit functions of the power conversion device 1.
  • FIG. 3A For example, a series circuit of switch elements Q11, Q12 (or Q13, Q14) is connected to the input / output terminals IO1, IO2 of the first input / output port P1. Since the inductors L11 and L12 connected to the switch elements Q11 and Q12 (or Q13 and Q14) are magnetically coupled inductors, an equivalent circuit of the leakage inductors Lr1 and Lr2 and the exciting inductor M1 as shown in FIG. Can be represented.
  • the exciting inductor M1 and the input / output terminal IO3 are equivalent to being short-circuited.
  • a step-down circuit is connected between the first input / output port P1 and the third input / output port P3. Therefore, the voltage input from the first input / output port P1 is stepped down and output from the third input / output port P3.
  • a booster circuit is connected between the third input / output port P3 and the first input / output port P1. Therefore, the voltage input from the third input / output port P3 is boosted and output from the first input / output port P1.
  • the step-up / step-down function on the secondary conversion circuit 20 side can be explained in the same manner as the primary conversion circuit 10 side. That is, the voltage input from the second input / output port P2 is stepped down and output from the fourth input / output port P4. The voltage input from the fourth input / output port P4 is boosted and output from the second input / output port P2.
  • each of the primary side conversion circuit 10 and the secondary side conversion circuit 20 includes a full bridge circuit. Since the inductors L11 and L12 (or L21 and L22) are coupled inductors that are magnetically coupled, they can be represented by an equivalent circuit of leakage inductors Lr1 and Lr2 (or Lr3 and Lr4) and excitation inductors. Since current flows through the inductors L11 and L12 (or L21 and L22) in the opposite direction to the polarity, the exciting inductor is canceled and only the leakage inductors Lr1 and Lr2 (or Lr3 and Lr4) act. The primary side conversion circuit 10 and the secondary side conversion circuit 20 are magnetically coupled.
  • a DAB converter circuit that inputs and outputs the first input / output port P1 and the second input / output port P2 is configured. Therefore, the first arm and the second arm are switched with a phase difference of 180 degrees ( ⁇ ), and the third arm and the fourth arm are switched with a phase difference of 180 degrees ( ⁇ ).
  • the power inputted to the first input / output port P1 (or the third input / output port P3) is converted and the second 2 input / output port P2 (or fourth input / output port P4). Further, the power input to the second input / output port P2 (or the fourth input / output port P4) can be converted and transmitted to the first input / output port P1 (or the third input / output port P3).
  • FIG. 5 is a diagram illustrating voltage waveforms of the respective parts of the primary side conversion circuit 10 and the secondary side conversion circuit 20 and current waveforms flowing through the inductor L11.
  • Vu1 is the drain-source voltage of the switch element Q12
  • Vv1 is the drain-source voltage of the switch element Q14
  • Vu2 is the drain-source voltage of the switch element Q22
  • Vv2 is the drain of the switch element Q24. The voltage between the sources (see FIG. 1).
  • an input power supply is connected to the first input / output port P1
  • a load is connected to the other ports
  • Vu1 and Vv1 are each on-time ⁇
  • a phase difference of 180 degrees from each other and Vu2 and Vv2 are respectively
  • the control unit 35 performs switching control of each switch element of the primary side conversion circuit 10 and the secondary side conversion circuit 20 so that the ON time ⁇ is reached and the phase difference is 180 degrees.
  • Vu1 and Vv1 are low (L)
  • the voltage step-down ratio at this time can be determined by the ON time ⁇ .
  • the voltage input from the third input / output port P3 is boosted by repeating high and low of Vu1 and Vv1. Are output to the first input / output port P1.
  • the step-up ratio can be determined by the on time ⁇ . Further, the secondary side conversion circuit 20 side can be explained in the same manner as the primary side conversion circuit 10 side.
  • the secondary side conversion circuit 20 causes the secondary coil 33 of the transformer 30 ⁇ the inductor L21 ⁇ the switch element Q21.
  • the switch elements Q22 and Q23 are turned on, the path of the secondary coil 34 of the transformer 30 ⁇ the inductor L22 ⁇ the switch element Q23 ⁇ the input / output terminal IO4. Current flows.
  • the voltage input from the first input / output port P1 becomes DAB. It is transmitted to the secondary conversion circuit 20 side by the function as a converter circuit, and is output from the second input / output port P2 and the fourth input / output port P4.
  • the phase difference ⁇ is changed, the time T1 when Vu1 and Vu2 are high (switch elements Q11 and Q21 are on) and Vv1 and Vv2 are low (switch elements Q14 and Q24 are on) changes.
  • the time T2 when Vu1 and Vu2 are low (switch elements Q12 and Q22 are on) and Vv1 and Vv2 are high (switch elements Q13 and Q23 are on) changes.
  • the amount of power transmitted from the primary side conversion circuit 10 to the secondary side conversion circuit 20 can be controlled by the phase difference ⁇ .
  • phase difference ⁇ power is transferred from the second input / output port P2 to the first input / output port P1 (or the third input / output port P3), and the fourth input / output port P4 to the first input / output port.
  • Power transmission to P1 (or third input / output port P3) becomes possible.
  • the switching elements of the primary side conversion circuit 10 and the secondary side conversion circuit 20 are controlled to be switched with a phase difference ⁇ ( ⁇ 0), whereby power is transferred from the secondary side conversion circuit 20 to the primary side conversion circuit 10. Is transmitted.
  • the primary side conversion circuit 10 and the secondary side conversion circuit 20 are symmetrical circuits. Therefore, when a power source such as a battery is connected to each of the first input / output port P1 and the second input / output port P2 and the phase difference ⁇ is 0, the primary side conversion circuit 10 and the secondary side conversion circuit 20 are symmetrical. Operate. In this case, the power transmitted from the primary side conversion circuit 10 to the secondary side conversion circuit 20 is regenerated from the secondary side conversion circuit 20 to the primary side conversion circuit 10.
  • the power transmitted from the secondary side conversion circuit 20 to the primary side conversion circuit 10 is regenerated from the primary side conversion circuit 10 to the secondary side conversion circuit 20.
  • power transmission in the insulation direction is not performed.
  • wasteful power consumption occurs due to regeneration.
  • the power conversion device 1 when performing only power transmission in the non-insulating direction, prevents the primary side conversion circuit 10 and the secondary side conversion circuit 20 from generating unnecessary power consumption due to regeneration.
  • the switching element is controlled to be switched.
  • switching control in the case where only power transmission in the non-insulating direction is performed will be described.
  • FIG. 6 is a timing chart of the switching elements Q11, Q12, Q13, and Q14 of the primary side conversion circuit 10 and a diagram showing voltage waveforms of each part of the primary side conversion circuit 10.
  • an input power source is connected to the first input / output port P1.
  • the control unit 35 alternately turns on and off the switch elements Q11 and Q13 and the switch elements Q12 and Q14.
  • the switch elements Q11 and Q13 are on and the switch elements Q12 and Q14 are off, the path of the input / output terminal IO1, the switch element Q11, the inductor L11, the primary coil 31 of the transformer 30, the input / output terminal IO3, and the input / output terminal Current flows through the path of IO1 ⁇ switch element Q13 ⁇ inductor L12 ⁇ primary coil 32 of transformer 30 ⁇ input / output terminal IO3.
  • the potentials of Vu1 and Vv1 are high (H).
  • the potential difference Vuv1 between the connection point of the switch elements Q11 and Q12 and the connection point of the switch elements Q13 and Q14 is always 0.
  • the voltage applied to the primary coils 31 and 32 of the transformer 30 is 0, and power transmission from the first input / output port P1 to the secondary side conversion circuit 20 side is not performed.
  • FIG. 7 is a timing chart of each switch element Q21, Q22, Q23, Q24 of the secondary side conversion circuit 20, and a diagram showing voltage waveforms of each part of the secondary side conversion circuit 20.
  • an input power source is connected to the second input / output port P2.
  • the control unit 35 turns on and off the switch elements Q21 and Q23 and the switch elements Q22 and Q24 alternately.
  • the switch elements Q21 and Q23 are on and the switch elements Q22 and Q24 are off, the input / output terminal IO4 ⁇ switch element Q21 ⁇ inductor L21 ⁇ secondary coil 33 of the transformer 30 ⁇ input / output terminal IO6 path and input / output terminal Current flows in the path of IO4 ⁇ switch element Q23 ⁇ inductor L22 ⁇ secondary coil 34 of transformer 30 ⁇ input / output terminal IO6.
  • the potentials of Vu1 and Vv1 are high (H).
  • the power conversion device 1 has a function as a step-up / step-down circuit and a function as a DAB converter circuit, and between any of the four input / output ports P1 to P4 and another input / output port. Power conversion can be performed. When power transmission is performed only in the non-insulated direction, unnecessary power consumption does not occur and efficient power transmission can be performed by preventing power transmission in the insulating direction.
  • the inductors L11 and L12 (or L21 and L22) included in the power conversion device 1A shown in FIG. 8 are not magnetically coupled and are independent of each other. Even in this case, as in the power converter 1, efficient power transmission can be performed.
  • the power converter 1B shown in FIG. 9 includes an inductor L13 connected between the center taps of the primary coils 31 and 32 and the input / output terminal IO3, the center taps of the secondary coils 33 and 34, and the input / output terminal IO6. And an inductor L23 connected between the two.
  • the inductors L11 and L12 may be magnetically coupled or may be independent of each other.
  • the inductor L13 is an example of a “fifth inductor” according to the present invention
  • the inductor L23 is an example of a “sixth inductor” according to the present invention.
  • the power converter 1C shown in FIG. 10 has a configuration that does not include the inductors L11, L12, and L23 in the circuit configuration of the power converter 1B.
  • the power conversion device 1D shown in FIG. 11 has a configuration that does not include the inductors L11 and L12 in the circuit configuration of the power conversion device 1B.
  • the inductors L21 and L22 may be magnetically coupled or may be independent of each other.
  • the power conversion device 1E shown in FIG. 12 includes three input / output ports P1, P2, and P3.
  • the power conversion device 1E is a power conversion circuit that performs power conversion between any two of the input / output ports P1, P2, and P3.
  • secondary side circuit 20 of power converter 1E is not provided with inductors L21 and L22.
  • the power conversion device 1F shown in FIG. 13 includes three input / output ports P1, P2, and P3, similarly to the power conversion device 1E. And the primary side circuit 10 of the power converter device 1F is not provided with the inductors L11 and L12, but is provided with the inductor L13.
  • the secondary circuit 20 includes only the inductor L21.
  • (Embodiment 2) In the second embodiment, when power transmission in the insulation direction is not performed, only the switch elements Q11 and Q13 are turned on and off in the primary side conversion circuit 10, and only the switch elements Q21 and Q23 are turned on and off in the secondary side conversion circuit 20. .
  • the primary side output unit 354 shown in FIG. 2 is an example of the “first prohibition unit” according to the present invention.
  • the secondary output unit 355 is an example of the “second prohibition unit” according to the present invention.
  • FIG. 14 is a timing chart of each switch element Q11, Q12, Q13, Q14 of the primary side conversion circuit 10 and a diagram showing voltage waveforms of each part of the primary side conversion circuit 10.
  • the power conversion device of this embodiment is the same as that in FIG. 1 and will be described assuming that an input power supply is connected to the first input / output port P1. Since the switching control of the primary side conversion circuit 10 and the secondary side conversion circuit 20 is the same, only the switching control of the primary side conversion circuit 10 will be described.
  • the control unit 35 turns on and off only the switch elements Q11 and Q13 at the same time, and always turns off the switch elements Q12 and Q14.
  • the switch elements Q21 and Q23 are MOS-FETs having body diodes, so that only the switch elements Q11 and Q13 can be switched even if they are always off. The rectification is performed by the body diode.
  • the third input / output port P3 ⁇ the inductors L11, L12. ⁇ Current flows through the path of the switch elements Q12 and Q14. That is, a regenerative current (broken line portion in FIG. 7) is generated from the third input / output port to the first input / output port P1.
  • the switch elements Q12 and Q14 are always turned off, generation of regenerative current can be suppressed and loss due to regenerative current can be suppressed.
  • the primary side conversion circuit 10 performs switching control only on the switch elements Q11 and Q13, and the secondary side.
  • the conversion circuit 20 only the switching elements Q21 and Q23 are switched. Thereby, generation
  • the power transmission mode when power is transmitted in the insulation direction, the power is transmitted in the insulation direction (hereinafter referred to as the insulation power transmission mode), and the power is not transmitted in the insulation direction.
  • a mode for transmitting power only to the power source hereinafter referred to as a non-insulated power transmission mode is alternately switched.
  • FIG. 15 is a diagram for explaining an operation mode of the power conversion device 1.
  • the input power source is connected to the first input / output port P1
  • the load is connected to the second input / output port P2
  • power is transmitted from the first input / output port P1 to the second input / output port P2.
  • the control unit 35 When power is transmitted from the first input / output port P1 to the second input / output port P2, the control unit 35, as described in the first embodiment, switches each switch element of the primary side conversion circuit 10 and the secondary side conversion circuit 20. Is controlled by the phase difference ⁇ .
  • the phase difference ⁇ at this time is a value that allows the power conversion device 1 to operate with high efficiency.
  • the power conversion mode determination unit 351 switches to an operation mode in which the insulated power transmission mode and the non-insulated power transmission mode are alternately executed as shown in FIG.
  • the primary side output unit 354 and the secondary side output unit 355 perform switching control of each switch element based on the operation mode determined by the power conversion mode determination unit 351.
  • the primary side output unit 354 and the secondary side output unit 355 of the control unit 35 perform switching control of each switch element of the primary side conversion circuit 10 and the secondary side conversion circuit 20 with the phase difference ⁇ . .
  • the primary side output unit 354 and the secondary side output unit 355 of the control unit 35 alternately turn on and off the switch elements Q11 and Q13 of the primary side conversion circuit 10 and the switch elements Q12 and Q14. Then, the switching elements Q21 and Q23 of the secondary side conversion circuit 20 and the switching elements Q22 and Q24 are alternately turned on and off.
  • the power conversion mode determination unit 351 is an example of the “switching unit” according to the present invention.
  • the primary side output unit 354 is an example of the “third switching control unit” according to the present invention.
  • the secondary side output unit 355 is an example of the “fourth switching control unit” according to the present invention.
  • the operation is performed with a phase difference ⁇ that can be operated with high efficiency, and the power transmitted in the insulation direction is adjusted by switching between the insulated power transmission mode and the non-insulated power transmission mode, thereby moving in the insulation direction.
  • the efficiency of power transmission can be improved.

Abstract

L'invention concerne un dispositif de conversion d'énergie (1) pourvu d'un circuit de conversion côté primaire (10) et d'un circuit de conversion côté secondaire (20), lesquels sont couplés magnétiquement l'un à l'autre au moyen d'un transformateur (30), et qui transmet de l'énergie dans la direction isolante et dans la direction non isolante. Les éléments de commutation (Q11, Q13) et les éléments de commutation (Q12, Q14) d'un circuit en pont complet du circuit de conversion (10) côté primaire sont rendus passants et bloqués en alternance. Les éléments de commutation (Q21-Q24) et les éléments de commutation (Q22, Q23) d'un circuit en pont complet du circuit de conversion (20) côté secondaire sont rendus passants et bloqués en alternance. Par conséquent, l'invention réalise un dispositif de conversion d'énergie qui est capable de supprimer une perte de transmission d'énergie et d'effectuer efficacement la transmission d'énergie.
PCT/JP2015/067955 2014-09-11 2015-06-23 Dispositif de conversion d'énergie WO2016038967A1 (fr)

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JP2016547734A JP6202212B2 (ja) 2014-09-11 2015-06-23 電力変換装置
CN201580047393.4A CN106605357B (zh) 2014-09-11 2015-06-23 电力变换装置
DE112015004158.3T DE112015004158T5 (de) 2014-09-11 2015-06-23 Stromrichter

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JP2018026961A (ja) * 2016-08-10 2018-02-15 Tdk株式会社 スイッチング電源装置
JP2020102933A (ja) * 2018-12-21 2020-07-02 新電元工業株式会社 スイッチング電源装置及びその制御方法
JP2020198745A (ja) * 2019-06-05 2020-12-10 新電元工業株式会社 スイッチング電源装置とその制御回路及び制御方法
WO2021074661A1 (fr) * 2019-10-16 2021-04-22 ZHU, Karen Ming Convertisseur de puissance à ponts multiples à sorties multiples
JP7325347B2 (ja) 2020-01-21 2023-08-14 新電元工業株式会社 スイッチング電源装置及びその制御方法

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JP6951222B2 (ja) * 2017-12-06 2021-10-20 シャープ株式会社 電力変換装置及び電力変換システム
JP7175137B2 (ja) * 2018-08-27 2022-11-18 ダイヤゼブラ電機株式会社 コンバータ

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JP2018026961A (ja) * 2016-08-10 2018-02-15 Tdk株式会社 スイッチング電源装置
JP2020102933A (ja) * 2018-12-21 2020-07-02 新電元工業株式会社 スイッチング電源装置及びその制御方法
JP2020198745A (ja) * 2019-06-05 2020-12-10 新電元工業株式会社 スイッチング電源装置とその制御回路及び制御方法
JP7304125B2 (ja) 2019-06-05 2023-07-06 新電元工業株式会社 スイッチング電源装置とその制御回路及び制御方法
WO2021074661A1 (fr) * 2019-10-16 2021-04-22 ZHU, Karen Ming Convertisseur de puissance à ponts multiples à sorties multiples
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JP7325347B2 (ja) 2020-01-21 2023-08-14 新電元工業株式会社 スイッチング電源装置及びその制御方法

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JPWO2016038967A1 (ja) 2017-05-25
JP6202212B2 (ja) 2017-09-27
DE112015004158T5 (de) 2017-05-24
CN106605357A (zh) 2017-04-26
CN106605357B (zh) 2019-04-16

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