WO2022004634A1 - 電源回路 - Google Patents

電源回路 Download PDF

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Publication number
WO2022004634A1
WO2022004634A1 PCT/JP2021/024307 JP2021024307W WO2022004634A1 WO 2022004634 A1 WO2022004634 A1 WO 2022004634A1 JP 2021024307 W JP2021024307 W JP 2021024307W WO 2022004634 A1 WO2022004634 A1 WO 2022004634A1
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WO
WIPO (PCT)
Prior art keywords
power conversion
conversion circuit
voltage
determination unit
switching element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/024307
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English (en)
French (fr)
Japanese (ja)
Inventor
和明 三野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP2022533978A priority Critical patent/JP7315105B2/ja
Priority to CN202180038292.6A priority patent/CN115699549A/zh
Publication of WO2022004634A1 publication Critical patent/WO2022004634A1/ja
Priority to US18/069,527 priority patent/US12224671B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/007—Plural converter units in cascade
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
    • 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
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4283—Arrangements for improving power factor of AC input by adding a controlled rectifier in parallel to a first rectifier feeding a smoothing capacitor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
    • H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
    • H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • 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
    • H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/325—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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
    • H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
    • H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H—ELECTRICITY
    • 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
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0009—Devices or circuits for detecting current in a converter
    • 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 supply circuit.
  • a transformer a primary conversion circuit connected to the primary side of the transformer to supply alternating current to the primary winding of the transformer, and an alternating current from the secondary winding of the transformer connected to the secondary side of the transformer.
  • a double output port charging circuit including a secondary side first conversion circuit and a secondary side second conversion circuit to be supplied has been proposed (see, for example, Patent Document 1).
  • the secondary side second conversion circuit includes a rectifier circuit that rectifies the alternating current supplied from the transformer, and a step-down chopper circuit that has a switching element and steps down the voltage output from the rectifier circuit and outputs the voltage to the load. , Equipped with.
  • the step-down chopper circuit of the secondary side second conversion circuit steps down a voltage higher than the rated voltage of the load to a voltage lower than the rated voltage of the load and loads the load. May be output to.
  • the switching element that constitutes a part of this step-down chopper circuit fails due to a short circuit, a voltage exceeding the rated voltage is applied to the load connected to the step-down chopper circuit or a power source such as a battery, and the load is damaged. There is a risk that it will end up.
  • the present invention has been made in view of the above reasons, and an object of the present invention is to provide a power supply circuit capable of suppressing load damage.
  • the power supply circuit is A transformer with a primary winding and a secondary winding, A first power conversion circuit that converts a DC voltage to an AC voltage and outputs it to the primary winding.
  • a rectifying smoothing circuit that rectifies and smoothes the AC voltage output from the secondary winding,
  • the present invention includes a second power conversion circuit that boosts the DC voltage output from the rectifying smoothing circuit and supplies a DC voltage equal to or lower than the preset rated voltage of the first load to the first load.
  • the power supply circuit is An input voltage determination unit that determines whether or not the input voltage of the second power conversion circuit is within the preset first reference voltage range, and Further, a first power conversion circuit control unit for controlling the first power conversion circuit is provided.
  • the first power conversion circuit control unit determines by the input voltage determination unit that the input voltage of the second power conversion circuit is equal to or higher than the upper limit of the first reference voltage range
  • the second power conversion circuit The first power conversion circuit is controlled so as to reduce the output voltage of the second power conversion circuit, and then the input voltage determination unit determines that the input voltage of the second power conversion circuit is equal to or higher than the upper limit of the first reference voltage range. Then, the first power conversion circuit may be stopped.
  • the power supply circuit is An input voltage determination unit that determines whether or not the input voltage of the second power conversion circuit is within a preset first reference voltage range, and A second power conversion circuit control unit that controls the second power conversion circuit is further provided.
  • the second power conversion circuit control unit determines that the input voltage of the second power conversion circuit is equal to or higher than the upper limit of the first reference voltage range by the input voltage determination unit, the second power conversion circuit It may be something that stops.
  • the power supply circuit is An output voltage determination unit that determines whether or not the output voltage of the second power conversion circuit is within a preset second reference voltage range.
  • a second power conversion circuit control unit that controls the second power conversion circuit is further provided.
  • the second power conversion circuit has a second inductor whose one end is connected to the output end on the high potential side of the rectifying smoothing circuit, the other end of the second inductor, and the output end on the low potential side of the rectifying smoothing circuit.
  • Has a second switching element connected between The second power conversion circuit control unit determines that the input voltage of the second power conversion circuit is within the preset first reference voltage range by the input voltage determination unit, and the output voltage determination unit determines that the input voltage is within the preset first reference voltage range.
  • the on / off operation of the second switching element is controlled so as to reduce the output voltage of the second power conversion circuit. It may be something.
  • the power supply circuit is Further, a current determination unit for determining whether or not the current flowing through the second switching element is equal to or higher than a preset current threshold value is provided.
  • a current determination unit for determining whether or not the current flowing through the second switching element is equal to or higher than a preset current threshold value is provided.
  • the power supply circuit is When the second switching element is turned on by the current determination unit after a preset reference time has elapsed since the second switching element was turned off, the second power conversion circuit control unit said. When it is determined that the current value of the current flowing through the second switching element is less than the current threshold value, the on / off operation of the second switching element may be started again.
  • the power supply circuit is Further, a current determination unit for determining whether or not the current flowing through the second switching element is equal to or higher than a preset current threshold value is provided.
  • a current determination unit for determining whether or not the current flowing through the second switching element is equal to or higher than a preset current threshold value is provided.
  • the second power conversion circuit boosts the DC voltage output from the rectifying smoothing circuit and outputs a DC voltage equal to or lower than the preset rated voltage of the first load to the first load.
  • the voltage output to the first load can be set to a voltage lower than the rated voltage of the first load. Therefore, damage to the first load due to the application of a voltage exceeding the rated voltage to the first load is suppressed.
  • the power supply circuit includes a transformer having a primary winding and two secondary windings, a first power conversion circuit that converts a DC voltage into an AC voltage and outputs the DC voltage to the primary winding of the transformer.
  • a rectifying smoothing circuit that is connected to the primary secondary winding of the two secondary windings and rectifies and smoothes the AC voltage output from the primary secondary winding, and a DC output from the rectifying smoothing circuit. It is provided with a second power conversion circuit for boosting the voltage and supplying a DC voltage equal to or lower than the preset rated voltage of the first load to the first load.
  • the power supply circuit is connected to an external AC system G via a connector CN when the vehicle is stopped, such as an EV or PHEV, and is supplied from the AC system G via the connector CN.
  • the AC power is converted into DC power and supplied to each of the loads LO1 and LO2.
  • the load LO1 is, for example, a second load having an output voltage of about 200 to 450 V and consisting of a so-called high-voltage battery that functions as a DC power source for driving a motor mounted on a vehicle.
  • the load LO2 has, for example, an output voltage of about 14 V, and is a DC power source for driving a vehicle accessory device such as a wiper, a head light, a room light, an audio device, an air conditioner, and various instruments mounted on the vehicle. It is a first load consisting of a so-called low voltage battery that functions as a so-called low voltage battery.
  • the power supply circuit includes a transformer Tr1 having a primary winding L1 and two secondary windings L21 and L22, a diode bridge DB, and a power factor improving circuit (hereinafter referred to as "PFC (Power Factor Correction) circuit").
  • the eleven, the smoothing diodes C1 and C2, and the power conversion circuits 12 and 21 are provided. Further, the power supply circuit includes a rectifying smoothing circuit 31, a power conversion circuit 32, and a controller 41.
  • the diode bridge DB is a rectifier circuit connected to the AC system G and rectifying the AC supplied from the AC system G.
  • the PFC circuit 11 improves the power factor of the alternating current supplied from the alternating current system G.
  • the PFC circuit 11 has three inductors L11, L12, L13, three switching elements Q11, Q12, Q13, and three diodes D11, D12, D13.
  • Each of the inductors L11, L12, and L13 is a first inductor in which one end is connected to the output end on the high potential side of the diode bridge DB.
  • the switching elements Q11, Q12, and Q13 are first switching elements connected between the other ends of the inductors L11, L12, and L13 and the output end on the low potential side of the diode bridge DB.
  • the switching elements Q11, Q12, and Q13 are, for example, N-channel MOSFETs, each of which has a source connected to the output end on the low potential side of the diode bridge DB and a drain connected to the first inductors L11, L12, and L13. There is.
  • the anodes of the diodes D11, D12, and D13 are connected to the other ends of the inductors L11, L12, and L13 and the drains of the switching elements Q11, Q12, and Q13.
  • the capacitor C1 is connected between the cathodes of the diodes D11, D12, and D13 and the output end on the low potential side of the diode bridge DB.
  • the power conversion circuit 12 is a full-bridge type first power conversion circuit having four switching elements Q21, Q22, Q23, and Q24, and functions as a DC-AC converter that converts direct current into alternating current.
  • the power conversion circuit 12 is connected between both ends of the switching elements Q11, Q12, and Q13 via diodes D11, D12, and D13.
  • the switching elements Q21 and Q23 are, for example, N-channel MOSFETs, and their drains are connected to the cathodes of the diodes D11, D12, and D13, respectively.
  • the switching elements Q22 and Q24 are, for example, N-channel MOSFETs, and the drain is connected to the source of the switching elements Q21 and Q23, respectively, and the source is connected to the output end on the low potential side of the diode bridge DB. .. Further, one end of the primary winding L1 of the transformer Tr1 is connected between the switching elements Q21 and Q22, and the other end of the primary winding L1 is connected between the switching elements Q23 and Q24.
  • the transformer Tr1 has a primary winding L1 provided on the AC system G side and two secondary windings L21 and L22.
  • the secondary winding L21 is a secondary winding provided on the load LO1 side.
  • the secondary winding L22 is a first secondary winding provided on the load LO2 side and having a pair of sub-windings L221 and L222.
  • the winding ratio between the number of windings of the primary winding L1 and the number of windings of the secondary winding L21 is set based on the voltage required for the load LO1.
  • the winding ratio between the number of windings of the primary winding L1 and the number of windings of the secondary winding L22 is the output voltage of the power conversion circuit 12 and the load. It is set based on the rated voltage of LO2.
  • the power conversion circuit 21 is a full-bridge type third power conversion circuit having four switching elements Q31, Q32, Q33, and Q34, and functions as an AC-DC converter that converts alternating current into direct current. That is, the power conversion circuit 21 converts the alternating current output from the secondary winding L21 different from the secondary winding L22 into direct current and outputs it to the load LO1 different from the load LO2.
  • the switching elements Q31 and Q33 are, for example, N-channel MOSFETs, and their drains are connected to one end of the secondary winding L22 of the transformer Tr1.
  • the switching elements Q32 and Q34 are, for example, N-channel MOSFETs, and the drain is connected to the source of the switching elements Q31 and Q33, respectively, and the source is connected to the other end of the secondary winding L22 of the transformer Tr1.
  • the smoothing capacitor C2 is connected between the switching elements Q31 and Q32, and the other end of the capacitor C2 is connected between the switching elements Q23 and Q24.
  • the load LO1 is connected between both ends of the capacitor C2.
  • the rectifying smoothing circuit 31 has two diodes D21 and D22 and a smoothing capacitor C3, and rectifies and smoothes the alternating current output from the secondary winding L22 of the transformer Tr1.
  • the anode of the diode D21 is connected to one end of the subwinding L221 of the secondary winding L22, and the anode of the diode D22 is connected to one end of the subwinding L222.
  • One end of the capacitor C3 is connected to the cathodes of the diodes D21 and D22, and the other end is connected to the other ends of the sub-windings L221 and L222 of the transformer Tr1.
  • the power conversion circuit 32 boosts the direct current output from the rectifying smoothing circuit 31 and outputs it to the load LO2.
  • the power conversion circuit 32 outputs a DC voltage equal to or lower than the rated voltage of the preset load LO1 to the load LO2.
  • the power conversion circuit 32 includes an inductor L3, a switching element Q4, and a diode D3.
  • the inductor L3 is a second inductor whose one end is connected to the output end on the high potential side of the rectifying smoothing circuit 31, that is, the cathodes of the diodes D21 and D22.
  • the switching element Q4 is a second switching element connected between the other end of the inductor L3 and the output end on the low potential side of the rectifying smoothing circuit 31.
  • the switching element Q4 is, for example, an N-channel MOSFET, the drain is connected to the other end of the inductor L3, and the source is connected to the output end on the low potential side of the rectifying smoothing circuit 31 and the load LO2 via the resistor R2.
  • the anode is connected to the other end of the inductor L3 and the drain of the switching element Q4, and the cathode is connected to the load LO2.
  • the power conversion circuit 32 has two resistors R11 and R12 connected in series between the output ends of the rectifying and smoothing circuit 31, and between the cathode of the diode D3 and the output end on the low potential side of the rectifying and smoothing circuit 31.
  • resistors R31 and R32 It has two resistors R31 and R32 connected in series.
  • the resistances R11 and R12 and the resistances R31 and R32 are selected so that the maximum voltage value of the voltage generated between both ends of the resistors R12 and R32 is, for example, about 3V.
  • the controller 41 includes a gate drive circuit (not shown) and has terminals Q11_P, Q12_P, Q13_P, Q21_P, Q22_P, Q23_P, Q24_P, Q31_P, Q32_P, Q33_P, Q34_P, Q4_P, te1, te2, te3, teG.
  • the terminals Q11_P, Q12_P, and Q13_P are connected to the gates of the switching elements Q11, Q12, and Q13 of the PFC circuit 11, respectively, via a gate drive circuit.
  • the terminals Q21_P, Q22_P, Q23_P, and Q24_P are connected to the gates of the switching elements Q21, Q22, Q23, and Q24 of the power conversion circuit 12, respectively.
  • the terminals Q31_P, Q32_P, Q33_P, and Q34_P are connected to the gates of the switching elements Q31, Q32, Q33, and Q34 of the power conversion circuit 21, respectively.
  • the terminal Q4_P is connected to the gate of the switching element Q4 of the power conversion circuit 32.
  • the terminal teG is connected to the output end on the low potential side of the rectifying smoothing circuit 31.
  • the terminal te1 is connected between the two resistances R11 and R12.
  • the terminal te2 is connected between the switching element Q4 and the resistor R2.
  • the terminal te3 is connected between the two resistances R31 and R32. Then, a voltage obtained by dividing the output voltage (voltage value V1) of the rectifying smoothing circuit 31 by the resistors R11 and R12 is applied between the terminals teG and te1. Further, a voltage proportional to the current flowing through the resistor R2 is applied between the terminals teG and te2. Further, between the terminals teG and te3, a voltage obtained by dividing the voltage (voltage value V2) generated between the cathode of the diode D3 and the output end on the low potential side of the rectifying smoothing circuit 31 by the resistors R31 and R32 is applied. Will be done.
  • the controller 41 has, for example, an FPGA (Field-Programmable Gate Array), and as shown in FIG. 2, the converter control unit 411, 421, 413, 414, the input voltage determination unit 415, the output voltage determination unit 416, and the like. It has a current determination unit 417 and.
  • the converter control unit 411 controls the output voltage of the PFC circuit 11 by outputting a PWM (Pulse Width Modulation) signal from the terminals Q11_P, Q12_P, Q13_P to the gates of the switching elements Q11, Q12, and Q13 via the gate drive circuit. do.
  • PWM Pulse Width Modulation
  • the converter control unit 412 is a first power conversion circuit control unit that drives the power conversion circuit 12 by outputting a PWM signal from the terminals Q21_P, Q22_P, Q23_P, and Q24_P to the gates of the switching elements Q21, Q22, Q23, and Q24.
  • the converter control unit 412 has a first state in which the switching elements Q21 and Q24 are turned on and the switching elements Q22 and Q23 are turned off, and a second state in which the switching elements Q21 and Q24 are turned off and the switching elements Q22 and Q23 are turned on.
  • the switching elements Q21, Q22, Q23, and Q24 are turned on and off so that the state and the state are alternately repeated.
  • the converter control unit 412 outputs a synchronization signal synchronized with the repetition of the first state and the second state of the switching elements Q21, Q22, Q23, and Q24 to the converter control unit 413.
  • the converter control unit 412 has switching elements Q21, Q22, so that the voltage value of the output voltage of the power conversion circuit 12 becomes the output voltage command value indicated by the output voltage command information input from the input voltage determination unit 415. Controls the on / off operation of Q23 and Q24.
  • the converter control unit 412 adjusts the on-duty ratio in the on-off operation of the switching elements Q21, Q22, Q23, and Q24 so that the voltage value of the output voltage of the power conversion circuit 12 becomes the above-mentioned output voltage command value, for example.
  • the converter control unit 413 drives the power conversion circuit 21 by outputting a PWM signal from the terminals Q31_P, Q32_P, Q33_P, Q34_P to the gates of the switching elements Q31, Q32, Q33, and Q34.
  • the converter control unit 413 has a third state in which the switching elements Q31 and Q34 are turned on and the switching elements Q32 and Q33 are turned off, and a fourth state in which the switching elements Q31 and Q34 are turned off and the switching elements Q32 and Q33 are turned on.
  • the switching elements Q31, Q32, Q33, and Q34 are turned on and off so that the state and the state are alternately repeated.
  • the converter control unit 413 synchronizes the switching elements Q21, Q22, Q23, and Q24 of the power conversion circuit 12 with the on / off operation based on the synchronization signal input from the converter control unit 412, and the switching elements Q31, Q32, Q33, Turn Q34 on and off.
  • the converter control unit 414 is a second power conversion circuit control unit that drives the power conversion circuit 32 by outputting a control signal from the terminal Q4_P to the gate of the switching element Q4.
  • the converter control unit 414 operates the switching element Q4 on and off so that the voltage value of the output voltage of the power conversion circuit 32 becomes the output voltage command value indicated by the output voltage command information input from the output voltage determination unit 416. Controls the on-duty ratio in.
  • the converter control unit 414 switches for a preset reference time after the off command signal is input.
  • the element Q4 is maintained in the off state.
  • the converter control unit 414 also outputs a control signal to the current determination unit 417.
  • the input voltage determination unit 415 determines whether or not the input voltage of the power conversion circuit 32 is within the preset first reference voltage range based on the voltage generated between the terminals teG and te1.
  • the first reference voltage range is set to a voltage range lower than the rated voltage of the load LO2, for example, 5V or more and less than 10V.
  • the input voltage determination unit 415 presets the output voltage command value indicated by the output voltage command information output to the converter control unit 412.
  • the output voltage command value is updated to a lower output voltage command value by the unit voltage.
  • the converter control unit 412 controls the on / off operation of the switching elements Q21, Q22, Q23, and Q24 of the power conversion circuit 12 so as to reduce the output voltage of the power conversion circuit 12 by a unit voltage.
  • the input voltage determination unit 415 determines that the input voltage of the power conversion circuit 32 is less than the lower limit value of the first reference voltage range, the input voltage determination unit 415 determines the output voltage command value indicated by the output voltage command information output to the converter control unit 411. The output voltage command value is updated to a higher output voltage command value by the preset unit voltage.
  • the converter control unit 412 controls the on / off operation of the switching elements Q21, Q22, Q23, and Q24 of the power conversion circuit 12 so as to raise the output voltage of the power conversion circuit 12 by a unit voltage. Further, when the input voltage of the power conversion circuit 32 is within the first reference voltage range, the input voltage determination unit 415 outputs a notification signal within the first reference voltage range to notify the fact to the output voltage determination unit 416.
  • the output voltage determination unit 416 determines whether or not the output voltage of the power conversion circuit 32 is within the preset second reference voltage range based on the voltage generated between the terminals teG and te3.
  • the second reference voltage range is set based on the rated voltage of the load LO2, for example, 12V or more and less than 15V.
  • the converter control unit 416 determines.
  • the output voltage command value indicated by the output voltage command information output to 414 is updated to a lower output voltage command value by a preset unit voltage.
  • the converter control unit 414 reduces the duty ratio in the on / off operation of the switching element Q4 of the power conversion circuit 32 so as to reduce the output voltage of the power conversion circuit 32 by a unit voltage.
  • the output voltage determination unit 416 determines that the output voltage of the power conversion circuit 32 is less than the lower limit of the second reference voltage range when the input voltage of the power conversion circuit 32 is in the first reference voltage range
  • the converter The output voltage command value indicated by the output voltage command information output to the control unit 414 is updated to a higher output voltage command value by a preset unit voltage.
  • the converter control unit 414 increases the duty ratio in the on / off operation of the switching element Q4 of the power conversion circuit 32 so as to reduce the output voltage of the power conversion circuit 32 by a unit voltage.
  • the current determination unit 417 determines whether or not the current flowing through the switching element Q4 of the power conversion circuit 32 is equal to or higher than a preset current threshold value based on the voltage generated between the terminals teG and te2.
  • a preset current threshold value based on the voltage generated between the terminals teG and te2.
  • the current determination unit 417 when the voltage generated between the terminals teG and te2 becomes a voltage corresponding to the product of the preset current threshold value and the resistance value of the resistor R2, the current flowing through the switching element Q4 becomes the current threshold value. It is determined that the above is the case.
  • the current determination unit 417 detects the ON state of the switching element Q4 based on the control signal input from the converter control unit 414, and detects the current flowing through the switching element Q4 when the switching element Q4 is in the ON state. ..
  • the current determination unit 417 determines that the current value of the current flowing through the switching element Q4 is equal to or greater than the current threshold value
  • the duty ratio decrease command for instructing the duty ratio in the on / off operation of the switching element Q4 to be decreased by a preset ratio.
  • a signal or an off command signal instructing the switching element Q4 to be maintained in the off state is output to the converter control unit 414.
  • the converter control unit 414 reduces the duty ratio in the on / off operation of the switching element Q4 by a preset ratio. Further, when the off command signal is input, the converter control unit 414 keeps the switching element Q4 in the off state for the above-mentioned reference time.
  • step S101 the input voltage determination unit 415 determines whether or not the voltage value V1 of the input voltage of the power conversion circuit 32 is equal to or higher than the preset upper limit value Vth1 of the first reference voltage range.
  • step S101 the input voltage determination unit 415 determines that the voltage value V1 of the input voltage of the power conversion circuit 32 is less than the upper limit value Vth1 of the first reference voltage range.
  • the input voltage determination unit 415 determines that the voltage value V1 of the input voltage of the power conversion circuit 32 is equal to or higher than the upper limit value Vth1 of the first reference voltage range (step S101: Yes)
  • the input voltage determination unit 415 outputs the output to the converter control unit 412.
  • the output voltage command value indicated by the output voltage command information is updated to the output voltage command value lower by the unit voltage described above.
  • the converter control unit 412 controls the on / off operation of the switching elements Q21, Q22, Q23, and Q24 of the power conversion circuit 12 so as to reduce the output voltage of the power conversion circuit 12 by a unit voltage (step S102).
  • the input voltage determination unit 415 again determines whether or not the voltage value V1 of the input voltage of the power conversion circuit 32 is equal to or greater than the upper limit value Vth1 of the first reference voltage range (step S103).
  • the input voltage determination unit 415 determines that the voltage value V1 of the input voltage of the power conversion circuit 32 is equal to or higher than the upper limit value Vth1 of the first reference voltage range (step S103: Yes)
  • the input voltage determination unit 415 commands the power conversion circuit 32 to be stopped.
  • the stop command signal is output to the converter control unit 412.
  • the converter control unit 412 stops the power conversion circuit 12 by keeping the switching elements Q21, Q22, Q23, and Q24 of the power conversion circuit 12 in the ON state (step S104).
  • step S103 determines that the input voltage value V1 of the input voltage of the power conversion circuit 32 is less than the upper limit value Vth1 of the first reference voltage range (step S103: No)
  • the input voltage of the power conversion circuit 32 It is determined whether or not the voltage value V1 of the above is less than the lower limit value Vtl1 of the first preset reference voltage range (step S105).
  • step S105 determines that the input voltage determination unit 415 determines that the voltage value V1 of the input voltage of the power conversion circuit 32 is equal to or higher than the lower limit value Vtl1 of the first reference voltage range (step S105: No)
  • the process of step S101 is executed again. ..
  • step S105 when the input voltage determination unit 415 determines that the voltage value V1 of the input voltage of the power conversion circuit 32 is less than the lower limit value Vtl1 of the first reference voltage range (step S105: Yes), the input voltage determination unit 415 outputs to the converter control unit 411.
  • the output voltage command value indicated by the output voltage command information is updated to the output voltage command value higher by the unit voltage described above.
  • the converter control unit 411 controls the on / off operation of the switching elements Q21, Q22, Q23, and Q24 of the power conversion circuit 12 so as to raise the output voltage of the power conversion circuit 12 by a unit voltage (step S106). After that, the process of step S101 is executed again.
  • Step S201 the voltage value V1 of the input voltage of the power conversion circuit 32 is within the above-mentioned first reference voltage range based on the notification signal within the first reference voltage range input from the input voltage determination unit 415.
  • step S201 when the output voltage determination unit 416 determines that the voltage value V1 of the input voltage of the power conversion circuit 32 is within the first reference voltage range (step S201: Yes), the voltage value V2 of the output voltage of the power conversion circuit 32 Is determined whether or not is equal to or higher than the preset upper limit value Vth2 of the second reference voltage range (step S202).
  • step S202 determines that the voltage value V2 of the output voltage of the power conversion circuit 32 is less than the upper limit value Vth2 of the second reference voltage range.
  • the output voltage determination unit 416 determines that the voltage value V2 of the output voltage of the power conversion circuit 32 is equal to or higher than the upper limit value Vth2 of the second reference voltage range (step S202: Yes)
  • the output voltage determination unit 416 outputs the output to the converter control unit 414.
  • the output voltage command value indicated by the output voltage command information is updated to the output voltage command value lower by the unit voltage described above.
  • the converter control unit 414 reduces the duty ratio in the on / off operation of the switching element Q4 of the power conversion circuit 32 so as to reduce the output voltage of the power conversion circuit 32 by a unit voltage (step S203).
  • the output voltage determination unit 416 determines whether or not the voltage value V2 of the output voltage of the power conversion circuit 32 is less than the lower limit value Vtl2 of the second reference voltage range (step S204).
  • the output voltage determination unit 416 determines that the voltage value V2 of the output voltage of the power conversion circuit 32 is equal to or higher than the lower limit value Vtl2 of the second reference voltage range (step S204: No)
  • the process of step S206 described later is executed.
  • the output voltage determination unit 416 determines that the voltage value V2 of the output voltage of the power conversion circuit 32 is less than the lower limit value Vtl2 of the second reference voltage range (step S204: Yes)
  • the output voltage determination unit 416 outputs the output to the converter control unit 414.
  • the output voltage command value indicated by the output voltage command information is updated to the output voltage command value higher by the unit voltage described above.
  • the converter control unit 414 raises the duty ratio in the on / off operation of the switching element Q4 of the power conversion circuit 32 so as to raise the output voltage of the power conversion circuit 32 by a unit voltage (step S205).
  • the current determination unit 417 determines whether or not the current value I of the current flowing through the switching element Q4 is equal to or higher than the preset current threshold It when the switching element Q4 of the power conversion circuit 32 is in the ON state. (Step S206).
  • the process of step S201 is executed again.
  • the duty ratio in the on / off operation of the switching element Q4 is set to a preset ratio.
  • a duty ratio reduction command signal is output to the converter control unit 414. As a result, the converter control unit 414 reduces the duty ratio in the on / off operation of the switching element Q4 of the power conversion circuit 32 (step S207).
  • the current determination unit 417 again determines whether or not the current value I of the current flowing through the switching element Q4 is equal to or higher than the preset current threshold It when the switching element Q4 of the power conversion circuit 32 is in the ON state. (Step S208).
  • the current determination unit 417 determines that the current value I of the current flowing through the switching element Q4 is less than the current threshold value It (step S208: No)
  • the process of step S201 is executed again.
  • the current determination unit 417 determines that the current value I of the current flowing through the switching element Q4 is equal to or greater than the current threshold value It when the switching element Q4 is on (step S208: Yes)
  • the current determination unit Q4 is turned off.
  • the off command signal instructing to maintain is output to the converter control unit 414. Then, when the off command signal is input, the converter control unit 414 turns off the switching element Q4 (step S209). Next, the converter control unit 414 determines whether or not a preset reference time has elapsed immediately after the off command signal is input (step S210). When the converter control unit 414 determines that the reference time has not yet elapsed immediately after the off command signal is input (step S210: No), the converter control unit 414 executes the process of step S209 again.
  • step S210 when the converter control unit 414 determines that the reference time has elapsed immediately after the off command signal is input (step S210: Yes), the converter control unit 414 starts the on / off operation of the switching element Q4 again (step S211). Subsequently, the process of step S201 is executed again.
  • the power conversion circuit 32 boosts the DC output from the rectifying smoothing circuit 31 and transfers a DC voltage equal to or lower than the rated voltage of the load LO2 to the load LO2. Output.
  • the voltage output to the load LO2 can be set to a voltage lower than the rated voltage of the load LO2, so that the load LO2 can be set to a voltage lower than the rated voltage of the load LO2. Damage to the load LO2 due to the application of a voltage exceeding the rated voltage is suppressed.
  • the power conversion circuit 12 determines that the input voltage of the power conversion circuit 32 is equal to or higher than the upper limit of the first reference voltage range by the input voltage determination unit 415.
  • the power conversion circuit 12 The on / off operation of the switching elements Q21, Q22, Q23, and Q24 of the power conversion circuit 12 is controlled so as to reduce the output voltage. Then, after the output voltage of the power conversion circuit 12 is lowered, the converter control unit 411 determines that the input voltage of the power conversion circuit 32 is equal to or higher than the upper limit of the first reference voltage range by the input voltage determination unit 415. Then, the power conversion circuit 12 is stopped.
  • the input voltage of the power conversion circuit 32 is in the first reference voltage range. If it does not, it is judged as abnormal and the device is stopped. Thereby, the load LO2 can be protected.
  • the converter control unit 414 determines that the current value of the current flowing through the switching element Q4 is equal to or higher than the preset current threshold value when the switching element Q4 is in the ON state by the current determination unit 417. Then, the switching element Q4 is maintained in the off state. As a result, the overcurrent is suppressed from flowing through the switching element Q4, so that damage to the switching element Q4 can be suppressed.
  • the converter control unit 414 switches when the switching element Q4 is turned on by the current determination unit 417 after a preset reference time has elapsed since the switching element Q4 was turned off.
  • the on / off operation of the switching element Q4 is started again.
  • the power conversion circuit 32 can be quickly restored to the original operating state, so that the MTTR of the power supply circuit is reduced. be able to.
  • the present invention is not limited to the configuration of the above-described embodiments.
  • the converter control unit that controls the power conversion circuit 12 determines that the input voltage of the power conversion circuit 32 is equal to or higher than the upper limit of the first reference voltage range
  • the converter control unit controls the power conversion circuit 12 to output the voltage. May be lowered, or the power conversion circuit 32 may be stopped.
  • the input voltage determination unit 415 determines whether or not the input voltage of the power conversion circuit 32 is within the above-mentioned first reference voltage range.
  • the stop command signal for instructing the converter control unit 412 to stop the power conversion circuit 12 Is output. Then, when the stop command signal is input, the converter control unit 412 maintains all of the switching elements Q21, Q22, Q23, and Q24 of the power conversion circuit 12 in the off state for a preset reference time.
  • the input voltage determination unit 415 determines whether or not the voltage value V1 of the input voltage of the power conversion circuit 32 is equal to or higher than the preset upper limit value Vt of the first reference voltage range (step S301).
  • the input voltage determination unit 415 repeatedly executes the process of step S301 as long as it determines that the voltage value V1 of the input voltage of the power conversion circuit 32 is less than the upper limit value Vt of the first reference voltage range (step S301: No). ..
  • the input voltage determination unit 415 determines that the voltage value V1 of the input voltage of the power conversion circuit 32 is equal to or higher than the upper limit value Vt of the first reference voltage range (step S301: Yes)
  • the input voltage determination unit 415 outputs a stop command signal to the converter control unit. Output to 412.
  • the converter control unit 412 stops the power conversion circuit 12 by keeping all the switching elements Q21, Q22, Q23, and Q24 of the power conversion circuit 12 in the off state for a preset reference time (step S302). ).
  • step S303 determines whether or not a preset reference time has elapsed immediately after the off command signal is input.
  • the converter control unit 412 executes the process of step S302 again.
  • step S303: Yes when the converter control unit 412 determines that the reference time has elapsed immediately after the off command signal is input (step S303: Yes), the converter control unit 412 starts the on / off operation of the switching elements Q21, Q22, Q23, and Q24 again (step S303: Yes). S304). Subsequently, the process of step S301 is executed again.
  • the converter control unit 414 dynamically changes the duty ratio in the on / off operation of the switching element Q4 so that the output voltage of the power conversion circuit 32 is within the second reference voltage range.
  • the present invention is not limited to this, and the converter control unit 414 may stop the power conversion circuit 32 when the output voltage of the power conversion circuit 32 becomes equal to or higher than the upper limit of the second reference voltage range.
  • step S201 the processes of steps S201 and S202 are executed.
  • step S202 the output voltage determination unit 416 determines in step S202 that the voltage value V2 of the output voltage of the power conversion circuit 32 is less than the upper limit value Vth2 of the second reference voltage range (step S201: No)
  • step S201: No the output voltage determination unit 416 determines in step S202 that the voltage value V2 of the output voltage of the power conversion circuit 32 is less than the upper limit value Vth2 of the second reference voltage range.
  • step S206 a step described later.
  • step S202 when the output voltage determination unit 416 determines in step S202 that the voltage value V2 of the output voltage of the power conversion circuit 32 is equal to or higher than the upper limit value Vth2 of the second reference voltage range (step S202: Yes), the power conversion circuit A stop command signal for instructing the 32 to be stopped is output to the converter control unit 414. As a result, the converter control unit 414 stops the power conversion circuit 32 by turning off the switching element Q4 (step S4201).
  • step S4202 determines whether or not a preset reference time has elapsed immediately after the off command signal is input.
  • the converter control unit 414 executes the process of step S4201 again.
  • the converter control unit 414 starts the on / off operation of the switching element Q4 again (step S4203). After that, the processes after step S206 are executed.
  • the power conversion circuit 32 connected to the rectifying smoothing circuit 31 on the secondary side of the transformer Tr1 is a non-isolated step-up DC-DC converter.
  • the present invention is not limited to this, and for example, a power conversion circuit 5032 including a flyback converter which is an isolated DC-DC converter as shown in FIG. 7 may be connected to the rectifying smoothing circuit 31.
  • the same reference numerals as those in FIG. 1 are attached to the same configurations as those in the embodiment.
  • the power conversion circuit 5032 includes a transformer Tr5 having a primary winding L51 and a secondary winding L52, a switching element Q4, a diode D53, and a capacitor C54.
  • One end of the primary winding L51 of the transformer Tr5 is connected to the output end on the high potential side of the rectifying smoothing circuit 31.
  • the switching element Q4 is connected between the other end of the primary winding L51 of the transformer Tr5 and the output end on the low potential side of the rectifying smoothing circuit 31.
  • the anode is connected to one end of the secondary winding L52 of the transformer Tr5, and the cathode is connected to the load LO2. Further, the other end of the secondary winding L52 is connected to the load LO2.
  • One end of the capacitor C54 is connected to the cathode of the diode D53, and the other end is connected to the other end of the secondary winding L52.
  • a series circuit composed of two resistors R31 and R32 is connected in parallel with the capacitor C54.
  • the diode D3 of the power conversion circuit 32 may be a switching element.
  • the present invention is suitable as a power supply device having both low-voltage power supply and high-voltage power supply functions mounted on a vehicle.

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Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0965509A (ja) * 1995-06-14 1997-03-07 Toyota Autom Loom Works Ltd 電気自動車用電池の充電方法及び電気自動車用充電器
JP2014036528A (ja) * 2012-08-09 2014-02-24 Nippon Soken Inc 絶縁型充電装置
JP2015208171A (ja) * 2014-04-23 2015-11-19 日立オートモティブシステムズ株式会社 電源装置
WO2018139200A1 (ja) * 2017-01-24 2018-08-02 株式会社村田製作所 電力変換装置及びパワーコンディショナ
JP2018125985A (ja) * 2017-02-01 2018-08-09 パナソニックＩｐマネジメント株式会社 電力変換システム

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6385058B1 (en) * 2001-05-17 2002-05-07 Northrop Grumman Active bleed voltage balancing circuit
JP6001587B2 (ja) * 2014-03-28 2016-10-05 株式会社デンソー 電力変換装置
US9614453B2 (en) * 2014-11-20 2017-04-04 Futurewei Technologies, Inc. Parallel hybrid converter apparatus and method
CN108237943B (zh) 2018-01-17 2019-05-17 深圳威迈斯新能源股份有限公司 一种双输出端口充电电路及其控制方法
CN113261191B (zh) * 2019-06-26 2023-05-05 华为数字能源技术有限公司 双向多端口功率转换系统及方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0965509A (ja) * 1995-06-14 1997-03-07 Toyota Autom Loom Works Ltd 電気自動車用電池の充電方法及び電気自動車用充電器
JP2014036528A (ja) * 2012-08-09 2014-02-24 Nippon Soken Inc 絶縁型充電装置
JP2015208171A (ja) * 2014-04-23 2015-11-19 日立オートモティブシステムズ株式会社 電源装置
WO2018139200A1 (ja) * 2017-01-24 2018-08-02 株式会社村田製作所 電力変換装置及びパワーコンディショナ
JP2018125985A (ja) * 2017-02-01 2018-08-09 パナソニックＩｐマネジメント株式会社 電力変換システム

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