WO2020129157A1 - Dispositif de conversion de puissance - Google Patents

Dispositif de conversion de puissance Download PDF

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Publication number
WO2020129157A1
WO2020129157A1 PCT/JP2018/046577 JP2018046577W WO2020129157A1 WO 2020129157 A1 WO2020129157 A1 WO 2020129157A1 JP 2018046577 W JP2018046577 W JP 2018046577W WO 2020129157 A1 WO2020129157 A1 WO 2020129157A1
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WIPO (PCT)
Prior art keywords
power conversion
voltage
conversion circuit
power
capacitor
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Application number
PCT/JP2018/046577
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English (en)
Japanese (ja)
Inventor
大斗 水谷
貴昭 ▲高▼原
Original Assignee
三菱電機株式会社
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.)
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2019512015A priority Critical patent/JP6523592B1/ja
Priority to PCT/JP2018/046577 priority patent/WO2020129157A1/fr
Publication of WO2020129157A1 publication Critical patent/WO2020129157A1/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
    • H02M3/02—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
    • 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

Definitions

  • the present invention relates to a power conversion device having at least three power conversion circuits.
  • a power converter is used that insulates the power supplied from the AC power supply, converts it to DC power, and supplies it to the load.
  • a power converter is generally a power conversion circuit (AC/DC converter) that converts AC power into DC power, and converts the DC power into DC power of a desired size using an insulating transformer.
  • a power conversion circuit isolated DC/DC converter
  • a power conversion device may be configured by two power conversion circuits, that is, a power conversion circuit (DC/DC converter) that converts electric power into a certain DC power and an insulating DC/DC converter.
  • a power conversion device When configuring a power conversion device with two power conversion circuits in this way, if the output voltage is controlled over a wide range, there is a problem that the loss of the insulation type DC/DC converter increases. Therefore, it is considered that a power conversion device is configured by three power conversion circuits connected in series by adding a power conversion circuit to the output side of the insulating converter (see, for example, Patent Document 1).
  • the power supply device described in Patent Document 1 includes an AC/DC converter, an insulating DC/DC converter, and a bidirectional DC/DC converter that are connected in series.
  • the AC/DC converter converts an AC voltage from an AC power source and outputs a DC voltage.
  • the insulation type DC/DC converter converts the DC voltage output from the AC/DC converter and outputs a link voltage.
  • the bidirectional DC/DC converter adjusts the value of the link voltage output from the isolated DC/DC converter, and gives the adjusted link voltage to the battery. Smoothing capacitors are respectively connected between the AC/DC converter and the isolated DC/DC converter, and between the isolated DC/DC converter and the bidirectional DC/DC converter.
  • the present invention has been made to solve the above problems, and an object thereof is to obtain a power conversion device capable of preventing the occurrence of overcurrent at the start of operation.
  • a power conversion device converts a voltage from an input power source into a DC voltage and outputs a converted DC voltage, and a first power conversion circuit via a first DC bus.
  • a second power conversion circuit that is connected to the circuit, transforms the DC voltage output from the first power conversion circuit, and outputs the transformed DC voltage; and second power conversion via a second DC bus bar.
  • a third power conversion circuit connected to the circuit for converting the DC voltage output from the second power conversion circuit and outputting the converted DC voltage to the load; and a first power conversion circuit connected to the first DC bus.
  • the second DC capacitor connected to the second DC bus, and the first, second, and third power conversion circuits start to operate in stages, and the voltage of the first DC capacitor becomes After the first threshold voltage is reached and the voltage of the second DC capacitor reaches the second threshold voltage, the first power conversion circuit outputs power to the load so that the first power conversion circuit outputs the power to the load.
  • the control part which controls the power converter circuit of 3 is provided.
  • the operations of the first, second, and third power conversion circuits are started in stages, so that the voltages of the first and second DC capacitors can be individually controlled. Therefore, it is possible to prevent the occurrence of overcurrent.
  • FIG. 1 is a schematic diagram showing a schematic configuration of a power supply system including a power conversion device according to a first embodiment. It is a figure which shows the specific circuit structural example of the power converter device which concerns on Embodiment 1. It is a figure which shows the specific circuit structural example of the power converter device which concerns on Embodiment 1.
  • FIG. 4 is a diagram for explaining an initial operation of the power conversion device when a resistive load is used as a load in the first embodiment.
  • FIG. 6 is a diagram for describing a first example of an initial operation of the power conversion device when a voltage source load is used as a load in the first embodiment.
  • FIG. 5 is a diagram for describing a second example of the initial operation of the power conversion device when the voltage source load is used as the load in the first embodiment.
  • FIG. 9 is a diagram for describing a third example of the initial operation of the power conversion device when the voltage source load is used as the load in the first embodiment. It is a figure which shows the modification of the power converter device which concerns on Embodiment 1. It is a figure which shows the other modification of the power converter device which concerns on Embodiment 1. It is a figure which shows the specific circuit structural example of the power converter device which concerns on Embodiment 2.
  • FIG. 9 is a diagram for explaining an initial operation of the power conversion device according to the second embodiment. It is a figure which shows the example in which the at least one part function of a control part is implement
  • FIG. 1 is a schematic diagram showing a schematic configuration of a power supply system including a power conversion device according to a first embodiment of the present invention.
  • the same or similar components are designated by the same reference numerals.
  • the power supply system includes a power conversion device 100, an input power supply 1 and a load 7.
  • the power conversion device 100 includes a first power conversion circuit 2, a first DC capacitor 3, a second power conversion circuit 4, a second DC capacitor 5, a third power conversion circuit 6 and a control unit 8.
  • One end (input terminal) of the first power conversion circuit 2 is connected to the input power supply 1.
  • One end (input terminal) of the second power conversion circuit 4 is connected to the other end (output terminal) of the first power conversion circuit 2.
  • One end (input terminal) of the third power conversion circuit 6 is connected to the other end (output terminal) of the second power conversion circuit 4.
  • the other end (output terminal) of the third power conversion circuit 6 is connected to the load 7.
  • the first power conversion circuit 2 converts the voltage from the input power supply into a DC voltage.
  • the second power conversion circuit 4 transforms the DC voltage from the first power conversion circuit 2 through an insulation transformer.
  • the third power conversion circuit 6 converts the DC voltage from the second power conversion circuit 4 and outputs it to the load 7.
  • the first DC capacitor 3 is connected between a pair of first DC buses 31 that connect the first power conversion circuit 2 and the second power conversion circuit 4, and the second DC capacitor 5 is It is connected between a pair of second DC buses 51 that connect the second power conversion circuit 4 and the third power conversion circuit 6.
  • the control unit 8 can control all of the first to third power conversion circuits 2, 4, and 6, and controls each switching element included in each power conversion circuit. In this case, the control unit 8 transmits a drive signal to each switching element included in all power conversion circuits, based on a part or all of detection results obtained from a current detector and a voltage detector described later, A desired operation is realized by controlling ON/OFF of the switching element.
  • the input power supply 1 is an AC power supply such as a commercial AC system or a private generator, or a DC power supply such as a battery.
  • the load 7 is a resistance load or a voltage source load.
  • the resistive load is a load that does not spontaneously generate a voltage, and is, for example, a lighting device or a temperature control device.
  • the voltage source load is a load that spontaneously generates a voltage, and is, for example, a high-voltage battery for vehicle running or a lead battery of vehicle electrical equipment. It goes without saying that the input power supply 1 and the load 7 are not limited to these examples.
  • FIGS. 2 and 3 are diagrams showing a specific circuit configuration example of the power conversion apparatus 100 according to the first embodiment.
  • an AC power supply is used as the input power supply 1.
  • a resistive load is used as the load 7
  • a voltage source load is used as the load 7.
  • the configuration of the power conversion device 100 is the same in the example of FIG. 2 and the example of FIG. 3.
  • the power conversion device 100 includes an AC/DC converter 20 that controls an input current to a high power factor as the first power conversion circuit 2, and a DC voltage as the second power conversion circuit 4.
  • An insulating DC/DC converter 40 that transforms is included, and a non-insulating DC/DC converter 60 that transforms a DC voltage is included as the third power conversion circuit 6.
  • the AC/DC converter 20 corresponds to a PFC (Power Factor Correction) that improves the power factor.
  • the first power conversion circuit 2 (AC/DC converter 20) shown in FIGS. 2 and 3 includes switching elements 21 to 24 and power factor improving AC reactors 215 and 216.
  • the switching elements 21 to 24 are connected in a full bridge type.
  • One end of the AC reactor 215 is connected to the AC power supply 11, and the other end is connected to a connection point between the switching element 21 and the switching element 22.
  • one end of the AC reactor 216 is connected to the AC power supply 11, and the other end is connected to a connection point between the switching element 23 and the switching element 24.
  • the AC reactors 215 and 216 are connected to both sides of the AC power supply 11, respectively, but may be connected to only one side. That is, only one of AC reactors 215 and 216 may be used.
  • the first power conversion circuit 2 shown in FIGS. 2 and 3 has a configuration in which switching elements are used for all semiconductor elements, but is a semi-bridgeless type or totem pole using passive semiconductor elements such as diodes. It goes without saying that it may be a mold configuration.
  • the second power conversion circuit 4 (insulation type DC/DC converter 40) shown in FIGS. 2 and 3 includes an insulation transformer 49, a primary side conversion circuit 4A and a secondary side conversion circuit 4B.
  • Isolation transformer 49 includes two windings that are magnetically coupled to each other. One winding of the isolation transformer 49 is connected to the terminal of the primary side conversion circuit 4A, and the other winding is connected to the terminal of the secondary side conversion circuit 4B.
  • the winding connected to the terminal of the primary side conversion circuit 4A is referred to as a primary side winding
  • the winding connected to the terminal of the secondary side conversion circuit 4B is referred to as a secondary side winding.
  • the primary side conversion circuit 4A includes switching elements 41 to 44.
  • the switching elements 41 to 44 are connected in a full bridge type.
  • the DC side terminal of the primary side conversion circuit 4A is connected to the first power conversion circuit 2 and the first DC capacitor 3 via the pair of first DC bus lines 31, and the AC side terminal.
  • one end of the primary winding of the insulating transformer 49 is connected to the connection point between the switching elements 41 and 42 connected in series, and the connection point between the switching element 43 and switching element 44 connected in series is connected.
  • the other end of the primary winding of the insulating transformer 49 is connected.
  • the secondary side conversion circuit 4B of the isolation transformer 49 includes switching elements 45 to 48.
  • the switching elements 45 to 48 are connected in a full bridge type.
  • the DC side terminal of the secondary side conversion circuit 4B is connected to the second DC capacitor 5 and the third power conversion circuit 6 via the pair of second DC bus lines 51, and the AC side terminal. Is connected to the secondary winding of the insulating transformer 49.
  • one end of the secondary winding of the insulating transformer 49 is connected to the connection point between the switching elements 45 and 46 connected in series, and the connection point between the switching elements 47 and 48 connected in series is connected.
  • the other end of the secondary winding of the insulating transformer 49 is connected.
  • the second power conversion circuit 4 may include a reactor, a capacitor, etc. connected in series or in parallel with the primary winding or the secondary winding of the insulating transformer 49.
  • a reactor and a capacitor By using a reactor and a capacitor, low-loss soft switching operation becomes possible.
  • a separately prepared reactor may be externally attached to the insulating transformer 49, and the leakage inductance or the exciting inductance of the insulating transformer 49 may be used as a reactor for reducing loss.
  • the secondary side conversion circuit 4B may be configured by a diode rectifier circuit using a diode or a voltage doubler rectifier circuit using a capacitor.
  • the third power conversion circuit 6 (DC/DC converter 60) shown in FIGS. 2 and 3 includes switching elements 61 and 62, a smoothing DC reactor 63, and a smoothing capacitor 64.
  • the third power conversion circuit 6 has a circuit configuration of a step-down chopper.
  • the resistive load 71 is connected to the output terminal of the third power conversion circuit 6.
  • the voltage source load 72 is connected to the output terminal of the third power conversion circuit 6.
  • the third power conversion circuit 6 shown in FIGS. 2 and 3 has a step-down chopper circuit configuration, it may have a step-up or step-up/step-down circuit configuration, and also has an interleave configuration or parallel connection. It goes without saying that it may have a configuration.
  • IGBTs Insulated Gate Bipolar
  • Transistor Metal Oxide Semiconductor Field Effect Transistor
  • SiC Silicon Carbide
  • MOSFET Metal Oxide Semiconductor Field Effect Transistor
  • GaN GaN Nitride Emitter
  • FET Field Effect Transistor
  • FET GaN (Galium Nitride Emitter)
  • the power conversion device 100 further includes current detectors D1 and D2 and voltage detectors D3 to D6.
  • the current detector D1 detects an AC input current iac flowing from the AC power supply 11 to the first power conversion circuit 2.
  • the current detector D2 detects the DC output current Iout flowing from the third power conversion circuit 6 to the load 7.
  • the voltage detector D3 detects the AC input voltage vac applied to the first power conversion circuit 2 from the AC power supply 11.
  • the voltage detector D4 detects the voltage Vlink of the first DC capacitor 3.
  • the voltage detector D5 detects the voltage Vint of the second DC capacitor 5.
  • the voltage detector D6 detects the voltage of the smoothing capacitor 64 of the third power conversion circuit 6 as the DC output voltage Vout given to the load 7 from the third power conversion circuit 6.
  • the detectors D1 to D6 provide the detection result to the control unit 8.
  • the control unit 8 performs feedback calculation based on a part or all of the given detection value to control ON/OFF of each switching element.
  • the control unit 8 controls the first to third power converters so that the first to third power converter circuits 2, 4 and 6 start the operation stepwise as an initial operation. Control the circuits 2, 4, and 6. After all the first to third power conversion circuits 2, 4 and 6 start operating, the control unit 8 controls the first to third power conversion circuits 2, 4 and 6 so as to perform steady operation.
  • the start of the operation means that the switching operation (ON/OFF operation) of at least one switching element included in the corresponding circuit is started.
  • the fact that the first to third power conversion circuits 2, 4 and 6 start operating stepwise means that at least two power conversion circuits start operating at different times.
  • the control unit 8 calculates various output values based on the detection results of the detectors D1 to D6, and controls the first to third power conversion circuits 2, 4, 6 based on the output values.
  • the AC input current iac is controlled so as to follow a predetermined target sine wave current iac*
  • the voltage Vlink of the first DC capacitor 3 follows the predetermined target DC voltage Vlink*
  • the voltage Vint of the second DC capacitor 5 is controlled so as to follow the predetermined target DC voltage Vint*.
  • the resistance load 71 is applied as the load 7
  • the DC output voltage Vout is controlled so as to follow a predetermined target DC output voltage Vout*
  • the voltage source load 72 is applied as the load 7.
  • the DC output current Iout is controlled so as to follow the predetermined target DC output current Iout*.
  • control unit 8 calculates the current difference between the sinusoidal current command (target sine wave current) iac* synchronized with the detected value of the AC voltage vac and the detected value of the AC input current iac.
  • the control unit 8 calculates the output value by proportional control or proportional integral control with the calculated current difference as the feedback amount.
  • the control unit 8 also calculates the voltage difference between the target DC voltage Vlink* and the detected value of the DC voltage Vlink of the first DC capacitor 3, and outputs the calculated voltage difference as a feedback amount by proportional control or proportional-integral control. Calculate the value.
  • the control unit 8 also calculates the voltage difference between the target DC voltage Vint* and the detected value of the DC voltage Vint of the second DC capacitor 5, and outputs the calculated voltage difference as a feedback amount by proportional control or proportional-integral control. Calculate the value.
  • the control unit 8 calculates the voltage difference between the target DC output voltage Vout* and the detected value of the DC output voltage Vout, and uses the calculated voltage difference as the feedback amount.
  • Output value is calculated by proportional control or proportional integral control.
  • the control unit 8 calculates the voltage difference between the target DC output current Iout* and the detected value of the DC output current Iout, and calculates the calculated voltage difference as the feedback amount.
  • the output value is calculated by proportional control or proportional integral control.
  • the control unit 8 determines that the AC input current iac, the voltages Vlink and Vint of the first and second DC capacitors 3 and 5 and the DC output voltage Vout (or the DC output current Iout) are the target values.
  • the first to third power conversion circuits 2, 4 and 6 are controlled so as to follow.
  • FIG. 4 is a diagram for explaining the initial operation of the power conversion device 100 when the resistive load 71 is used as the load 7.
  • FIG. 4 shows detected values of the voltage Vlink of the first DC capacitor 3, the AC input voltage vac, the AC input current iac, the voltage Vint of the second DC capacitor 5, and the DC output voltage Vout.
  • the horizontal axis represents time, and the vertical axis represents current or voltage.
  • “1st” shown in the lower stage represents the operation start time of the first power conversion circuit 2
  • "2nd” represents the operation start time of the second power conversion circuit 4
  • “3rd” represents the operation start time.
  • 3 represents the operation start time of the power conversion circuit 6 of No. 3.
  • the time when the power conversion device 100 is in the non-operating state is defined as the initial time t0. That is, at time t0, the switching operations of the first power conversion circuit 2, the second power conversion circuit 4, and the third power conversion circuit 6 are all stopped. At time t0, the voltage Vlink of the first DC capacitor 3 and the voltage Vint of the second DC capacitor 5 are 0, respectively.
  • the controller 8 controls the voltage Vlink of the first DC capacitor 3, the voltage Vint of the second DC capacitor 5, and the DC output voltage Vout to change as follows based on the detection results of the detectors D1 to D6. , And controls the first to third power conversion circuits 2, 4, and 6.
  • the AC input voltage vac is applied to the input terminal of the first power conversion circuit 2.
  • the first DC capacitor 3 is passively charged via the built-in diode of each switching element of the first power conversion circuit 2 or the external diode.
  • the voltage Vlink of the first DC capacitor 3 rises to the initial charging voltage Vlink0.
  • the initial charging voltage Vlink0 satisfies the equation (1) with respect to the effective values Vac and rms of the AC input voltage vac. Note that “ ⁇ 2Vac,rms” in the equation (1) corresponds to the maximum value of the AC input voltage vac.
  • the switching operation of the first power conversion circuit 2 is started.
  • the effective duty ratio of the first power conversion circuit 2 is gradually increased, so that the voltage Vlink of the first DC capacitor 3 is gradually increased. Thereby, abrupt voltage change is prevented.
  • the switching operations of the second power conversion circuit 4 and the third power conversion circuit 6 are stopped.
  • the voltage Vlink of the first DC capacitor 3 reaches the predetermined first threshold voltage Vlink,th.
  • the power factor control of the AC input current iac by the first power conversion circuit 2 is started, and the switching operation of the second power conversion circuit 4 is started.
  • the first threshold voltage Vlink,th satisfies the condition of Expression (2).
  • the first power conversion circuit 2 continues the normal operation (boosting operation). Can't do it. Specifically, the current path between the AC power supply 11 and the first DC capacitor 3 is fixed regardless of whether the switching elements 21 to 24 are turned on or off. Therefore, the voltage Vlink of the first DC capacitor 3 needs to be maintained at or above the maximum value of the AC input voltage vac.
  • the initial charging voltage Vlink0 of the first DC capacitor 3 is equal to or higher than the maximum value ( ⁇ 2Vac, rms) of the AC input voltage vac, and before the operation of the second power conversion circuit 4 starts, The voltage Vlink of the DC capacitor 3 is maintained above the AC input voltage vac. However, when the operation of the second power conversion circuit 4 is started, a current flows from the first DC capacitor 3 to the second DC capacitor 5, so that the voltage Vlink of the first DC capacitor 3 decreases, and The voltage Vlink of the DC capacitor 3 of No. 1 may be lower than the maximum value of the AC input voltage vac.
  • the switching operation of the second power conversion circuit 4 is performed after the voltage Vlink of the first DC capacitor 3 is raised to the first threshold voltage Vlink,th by the first power conversion circuit 2. Be started.
  • the switching operation of the second power conversion circuit 4 can be started in a state where a certain margin is secured between the voltage Vlink of the first DC capacitor 3 and the AC input voltage vac.
  • the effective duty ratio of the second power conversion circuit 4 is gradually increased from 0, and the current flowing from the first DC capacitor 3 to the second DC capacitor 5 is gradually increased from 0. ..
  • a sharp decrease in the voltage Vlink of the first DC capacitor 3 due to the start of the operation of the second power conversion circuit 4 is suppressed.
  • the duty ratio gradually increases is not limited to the case where the duty ratio linearly and continuously increases at a constant rate of change as in the example of Fig. 4, and the duty ratio is curvilinear and continuous. And the case where the duty ratio increases stepwise through a plurality of steps. However, when the duty ratio is increased stepwise, it is preferable that the number of steps is set sufficiently large and the change width in one step is as small as possible.
  • the voltage Vlink of the first DC capacitor 3 is prevented from becoming lower than the maximum value of the AC input voltage vac, and the first power conversion circuit 2 can stably continue normal operation.
  • the first threshold voltage Vlink,th is set to a value smaller than the target DC voltage Vlink*, the voltage Vlink of the first DC capacitor 3 is prevented from becoming an overvoltage, and the second power is reduced. The time until the operation of the conversion circuit 4 starts can be shortened.
  • the switching operation of the second power conversion circuit 4 is started, and at the same time, the power factor control by the first power conversion circuit 2 is started.
  • the magnitude (amplitude) of the AC input current iac can be gradually increased from 0 to the maximum value. Therefore, the first and second DC capacitors 3 and 5 can be stably charged.
  • the voltage Vlink of the first DC capacitor 3 reaches the target DC voltage Vlink*
  • the voltage Vlink is controlled so as to follow the target DC voltage Vlink*. Control is performed such that the voltage Vlink of the first DC capacitor 3 reaches the first threshold voltage Vlink,th at time t3, and the voltage Vlink of the first DC capacitor 3 follows the target DC voltage Vlink*. May be done.
  • the second threshold voltage Vint,th satisfies the condition of Expression (3).
  • the third power conversion circuit 6 when the voltage Vint of the second DC capacitor 5 becomes lower than the DC output voltage Vout output to the resistive load 71 during the operation of the third power conversion circuit 6, the third power conversion circuit 6 operates normally. It becomes impossible to continue the operation (step-down operation). Specifically, by setting the duty ratio of the third power conversion circuit 6 to 0, the switching element 61 is constantly turned off, and power cannot be supplied to the resistive load 71. Therefore, the voltage Vint of the second DC capacitor 5 needs to be maintained higher than the DC output voltage Vout.
  • the operation of the third power conversion circuit 6 is started after the voltage Vint of the second DC capacitor 5 is raised to the second threshold voltage Vint,th by the second power conversion circuit 4. ..
  • the switching operation of the third power conversion circuit 6 can be started with a certain margin secured between the voltage Vint of the second DC capacitor 5 and the DC output voltage Vout.
  • the effective duty ratio of the third power conversion circuit 6 is gradually increased from 0, and the current flowing from the second DC capacitor 5 to the resistive load 71 is gradually increased from 0.
  • a sharp drop in the voltage Vint of the second DC capacitor 5 due to the start of the operation of the third power conversion circuit 6 is suppressed.
  • the voltage Vint of the second DC capacitor 5 is prevented from becoming lower than the DC output voltage Vout, and the third power conversion circuit 6 can stably continue normal operation.
  • the voltage Vint of the second DC capacitor 5 is controlled so as to follow the target DC voltage Vint*. Control is performed such that the voltage Vint of the second DC capacitor 5 follows the target DC voltage Vint* from the time when the voltage Vint of the second DC capacitor 5 reaches the second threshold voltage Vint,th at time t4. May be done.
  • FIG. 4 shows only the change in the DC output voltage Vout as the change in the power supplied to the resistive load 71
  • the DC output current Iout also increases as the DC output voltage Vout increases.
  • the on/off control of the switching element is performed using the detected value of the DC output voltage Vout instead of the detected value of the DC output current Iout. Illustration of the DC output current Iout is omitted.
  • the operations of the first to third power conversion circuits 2, 4, and 6 are sequentially started, so that the first and second power conversion circuits are started.
  • the DC capacitors 3 and 5 are sequentially charged.
  • the overcurrent in the first to third power conversion circuits 2, 4, and 6 The power supply to the load 7 can be stably started without generating the overvoltage of the second DC capacitors 3 and 5.
  • the voltage is applied to the first and second DC capacitors 3 and 5 and the load 7 at the same time.
  • the current flows in.
  • an overcurrent may occur in the first to third power conversion circuits 2, 4, 6 and the first and second DC capacitors 3, 5 may become overvoltage.
  • the voltages of the first and second DC capacitors 3 and 5 can be individually controlled. .. Specifically, the voltage Vlink of the first DC capacitor 3 can be controlled by adjusting the duty ratio of the first power conversion circuit 2 while the operation of the second power conversion circuit 4 is stopped. it can. Further, the voltage Vint of the second DC capacitor 5 can be controlled by adjusting the duty ratio of the second power conversion circuit 4 while the operation of the third power conversion circuit 6 is stopped. Therefore, the voltage of the first and second DC capacitors 3 and 5 can be stably increased.
  • the rate of change (gradient) of the voltage Vlink is different, the rate of change of the voltage Vlink may be constant from the voltage Vlink of 0 to the target DC voltage Vlink*.
  • the voltage Vint is divided into a period from the voltage Vint reaching 0 to the second threshold voltage Vint,th and a period from the voltage Vint reaching the second threshold voltage Vint,th to the target DC voltage Vint*.
  • the rate of change of the voltage Vint may be constant from the voltage Vint of 0 to the target DC voltage Vint*.
  • the voltage Vlink and the voltage Vint may not change continuously, but may change stepwise through a plurality of steps. However, in order to effectively prevent the occurrence of overcurrent and overvoltage, it is preferable that the number of steps is set sufficiently large and the voltage change width in one step is as small as possible.
  • FIG. 5 is a diagram for explaining a first example of the initial operation of the power conversion device 100 when the voltage source load 72 is applied to the load 7. Similar to the example of FIG. 4, FIG. 5 shows the detected values of the voltages Vlink, vac, Vint, Vout and the current iac, as well as the detected values of the DC output current Iout. As described above, when the voltage source load 72 is used as the load 7, the on/off control of the switching element is performed using the detected value of the DC output current Iout.
  • the voltage source load 72 generates a constant DC voltage. Therefore, at time t0 when the power conversion device 100 is in the non-operating state, the DC voltage from the voltage source load 72 is applied to the output terminal of the third power conversion circuit 6. This voltage is detected as the voltage Vout. In this case, the second DC capacitor 5 is passively charged through the built-in diode of the switching element of the third power conversion circuit 6 or the external diode. As a result, the voltage Vint of the second DC capacitor 5 is maintained at the initial charging voltage Vint0.
  • the AC input voltage vac is applied to the input terminal of the first power conversion circuit 2 at time t1.
  • the voltage Vlink of the first DC capacitor 3 rises to the initial charging voltage Vlink0.
  • the switching operation of the first power conversion circuit 2 is started.
  • the effective duty ratio of the first power conversion circuit 2 is gradually increased, so that the voltage Vlink of the first DC capacitor 3 is gradually increased.
  • the first DC capacitor 3 The switching operation of the second power conversion circuit 4 may be started before the voltage Vlink reaches the first threshold voltage Vlink,th.
  • the third power is added to the first power conversion circuit 2 and the second power conversion circuit 4.
  • the switching operation of the conversion circuit 6 is started, and power is supplied from the third power conversion circuit 6 to the resistance load 71.
  • the effective duty ratio of the third power conversion circuit 6 is gradually increased from 0, so that the DC current Iout given to the voltage source load 72 is gradually increased from 0. That is, the electric power applied to the voltage source load 72 gradually increases from zero.
  • the first to third power conversion circuits 2, 4, and 6 are started in order, so that the first and the second power conversion circuits are started.
  • the voltages Vlink and Vint of the two DC capacitors 3 and 5 can be individually and accurately controlled.
  • the power converter 100 transfers the load 7 to the load 7 without generating an overcurrent in the first to third power conversion circuits 2, 4 and 6 and an overvoltage in the first and second DC capacitors 3 and 5.
  • the power supply can be stably started.
  • the operation start timing of the second power conversion circuit 4 and the operation start timing of the third power conversion circuit 6 can be set relatively flexibly. it can. A specific example will be described below.
  • FIG. 6 is a diagram for explaining a second example of the initial operation of the power conversion device 100 when the voltage source load 72 is applied to the load 7.
  • the example of FIG. 6 will be described focusing on the points different from the example of FIG.
  • the operation of the second power conversion circuit 4 has not started, so no current flows between the first DC capacitor 3 and the second DC capacitor 5. Therefore, the operation of the first power conversion circuit 2 does not affect the voltage Vint of the second DC capacitor 5, and the operation of the third power conversion circuit 6 does not affect the voltage Vlink of the first DC capacitor 3. .. Therefore, by individually adjusting the duty ratios of the first and third power conversion circuits 2 and 6, the voltages Vlink and Vint of the first and second DC capacitors 3 can be individually controlled.
  • the time when the operation of the third power conversion circuit 6 is started may coincide with the time when the voltage Vlink of the first DC capacitor 3 reaches the first threshold voltage Vlink,th. It may be before the voltage Vlink of the DC capacitor 3 reaches the first threshold voltage Vlink,th.
  • the voltage Vint of the second DC capacitor 5 reaches the second threshold voltage Vint,th.
  • the power factor control by the first power conversion circuit 2 is started, and the switching operation of the second power conversion circuit 4 is started.
  • current flows from the power conversion device 100 to the voltage source load 72, and power is supplied to the voltage source load 72.
  • the effective duty ratio of the second power conversion circuit 4 is gradually increased from 0, so that the DC current Iout given to the voltage source load 72 is gradually increased from 0.
  • the second DC capacitor 5 can be charged with the electric power from the voltage source load 72. If the operation of the second power conversion circuit 4 is not started, the operation of the first power conversion circuit 2 and the operation of the third power conversion circuit 6 do not affect each other. Therefore, as in the example of FIG. 6, the operation of the third power conversion circuit 6 is started after the first power conversion circuit 2, and the operation of the third power conversion circuit 6 is followed by the second power conversion circuit 4. The operation of can be started.
  • FIG. 7 is a diagram for explaining a third example of the initial operation of the power conversion device 100 when the voltage source load 72 is applied to the load 7.
  • the example of FIG. 7 will be described focusing on the points different from the example of FIG.
  • the voltage source load 72 is not electrically connected to the output terminal of the third power conversion circuit 6 at time t0. Therefore, at time t0, no voltage is applied from the voltage source load 72 to the output terminal of the third power conversion circuit 6, and the voltage Vint of the second DC capacitor 5 is zero.
  • the voltage source load 72 is electrically connected to the output terminal of the third power conversion circuit 6 at time t2c. Connected. As a result, the voltage of the voltage source load 72 is applied to the output terminal of the third power conversion circuit 6 and detected as the voltage Vout.
  • the second DC capacitor 5 is passively charged via the built-in diode of the switching element of the third power conversion circuit 6 or the external diode, and at time t3c, the second DC capacitor 5 is charged.
  • the voltage Vint reaches the initial charging voltage Vint0.
  • time t1 even if the AC input voltage vac is applied to the input terminal of the first power conversion circuit 2 and the voltage of the voltage source load 72 is applied to the output terminal of the third power conversion circuit 6 at the same time. Good.
  • the switching operation of the third power conversion circuit 6 is started.
  • the effective duty ratio of the third power conversion circuit 6 is gradually increased, so that the voltage Vint of the second DC capacitor 5 is gradually increased.
  • the voltage Vint of the second DC capacitor 5 reaches the second threshold voltage Vint,th.
  • the switching operation of the first power conversion circuit 2 is started.
  • the effective duty ratio of the first power conversion circuit 2 is gradually increased, so that the voltage Vlink of the first DC capacitor 3 is gradually increased.
  • the power factor control of the first power conversion circuit 2 is started and the second power conversion circuit is started.
  • the switching operation of No. 4 is started.
  • the effective duty ratio of the second power conversion circuit 4 is gradually increased from 0, so that the DC current Iout given to the voltage source load 72 is gradually increased from 0.
  • the second DC capacitor 5 can be charged by the electric power from the voltage source load 72. Further, in a state where the operation of the second power conversion circuit 4 is not started, the operation of the first power conversion circuit 2 and the operation of the third power conversion circuit 6 do not influence each other. Therefore, as in the example of FIG. 7, the operation of the third power conversion circuit 6 is started after the first power conversion circuit 2, and the operation of the second power conversion circuit 4 is started after the third power conversion circuit 6. The operation of can be started.
  • the first power conversion circuit 2 and the third power conversion circuit 6 start operating at different times, but the first power conversion circuit 2 and the third power conversion circuit The circuit 6 and the circuit 6 may start operating at the same time.
  • the operations of the first to third power conversion circuits 2, 4, and 6 are started stepwise, so that the first to third power conversion circuits are started.
  • the voltages of the first and second DC capacitors 3, 5 can be individually controlled. Thereby, the voltage of the first and second DC capacitors 3 can be stably increased.
  • the first power conversion circuit 2 is composed only of the AC/DC converter 20
  • the third power conversion circuit 6 is composed only of the DC/DC converter 60.
  • the configurations of the power conversion circuits 2 and 6 are not limited to this.
  • FIG. 8: is a figure which shows the modification of the power converter device 100 which concerns on Embodiment 1. As shown in FIG.
  • the power conversion device 100 shown in FIG. 8 includes a first power conversion circuit 2A in place of the first power conversion circuit 2 and a third power conversion circuit 6A in place of the third power conversion circuit 6.
  • the first power conversion circuit 2A includes a step-down DC/DC converter 200 in addition to the AC/DC converter 20 of FIGS. 2 and 3.
  • DC/DC converter 200 includes a capacitor 211, switching elements 212 and 213, and a reactor 214.
  • the AC/DC converter 20 converts an AC voltage into a DC voltage, and the converted DC voltage is stepped down by the DC/DC converter and output.
  • the power factor control is performed by the boost converter (AC/DC converter 20 in this example) in order to suppress harmonic distortion.
  • the boost converter AC/DC converter 20 in this example
  • the DC/DC converter 200 can reduce the voltage applied to the insulating transformer 49, and can suppress an increase in iron loss.
  • the third power conversion circuit 6A shown in FIG. 8 includes an insulation type DC/DC converter 600 in addition to the DC/DC converter 60 of FIGS. 2 and 3.
  • the insulation type DC/DC converter 600 includes an insulation transformer 610, switching elements 611 to 618, and a capacitor 619.
  • the DC voltage is converted into the DC voltage by the DC/DC converter 60, and the converted DC voltage is transformed by the insulating DC/DC converter 60 and output.
  • the switching elements 212 and 213 of the DC/DC converter 200 and the switching elements 611 to 618 of the insulation type DC/DC converter 600 are on/off controlled by the control unit 8.
  • the operation of the AC/DC converter 20 and the operation of the DC/DC converter 200 may be started at the same time, and the operation of the DC/DC converter 200 may be started after a lapse of time after the operation of the AC/DC converter 20 is started.
  • the operation may be started.
  • the operation of the DC/DC converter 60 and the operation of the insulation type DC/DC converter 600 may be started simultaneously, and the insulation type DC/DC may be started after a lapse of time from the start of the operation of the DC/DC converter 60.
  • the operation of converter 600 may be started.
  • the voltage source load 72 is used as the load 7
  • the operation of the DC/DC converter 60 may be started after a lapse of time after the operation of the insulating DC/DC converter 600 is started.
  • the power conversion device 100 may further include other power conversion circuits in addition to the first to third power conversion circuits 2 (2A), 4, 6 (6A).
  • FIG. 9: is a figure which shows the other modification of the power converter device 100 which concerns on Embodiment 1. As shown in FIG. In the power conversion device 100 shown in FIG. 9, the fourth power conversion circuit 91 and the fifth power conversion circuit are arranged in parallel with the first power conversion circuit 2, the first DC capacitor 3, and the second power conversion circuit 4. The circuit 92 is connected.
  • the fourth power conversion circuit 91 includes switching elements 911 to 914, a capacitor 915, and a non-contact power receiving coil 916.
  • the switching elements 911 to 914 are connected in a full bridge type.
  • One end of the non-contact power receiving coil 916 is connected to a connection point where the switching element 911 and the switching element 912 are connected in series, and non-contact power reception is performed at a connection point where the switching element 913 and the switching element 914 are connected in series.
  • the other end of the coil 916 is connected.
  • the fourth power conversion circuit 91 is connected to the pair of second DC buses 51 via the pair of third DC buses 917, respectively.
  • the fifth power conversion circuit 92 includes switching elements 921 to 928, a DC link capacitor 929, AC reactors 931 and 932, and a non-contact power transmission coil 933.
  • the switching elements 921 to 924 and the switching elements 925 to 928 are connected in a full bridge type.
  • One ends of the AC reactors 931 and 932 are connected to the AC power supply 11.
  • the other end of AC reactor 931 is connected to a connection point between switching element 921 and switching element 922 that are connected in series, and the other end of AC reactor 932 is a connection point between switching element 923 and switching element 924 that are connected in series. It is connected to the.
  • the DC link capacitor 929 is connected to the positive and negative electrodes of the DC bus connecting the switching elements 921 to 924 and the switching elements 925 to 928.
  • One end of the non-contact power transmission coil 933 is connected to a connection point between the switching element 925 and the switching element 926 connected in series, and the non-contact power transmission coil 933 is connected to a connection point between the switching element 927 and the switching element 928 connected in series. The ends are connected.
  • the non-contact power reception coil 916 of the fourth power conversion circuit 91 and the non-contact power transmission coil 933 of the fifth power conversion circuit 92 are magnetically coupled to each other, so that the fifth power conversion circuit 92 outputs the fourth power. Electric power is transmitted to the conversion circuit 91 in a contactless manner. A DC voltage is applied from the fourth power conversion circuit 91 to the second DC capacitor 5 via the third DC bus 917.
  • a power conversion device according to Embodiment 2 of the present invention will be described focusing on differences from the power conversion device 100 according to Embodiment 1 above.
  • the configuration of the power conversion device according to the second embodiment is substantially the same as the case shown in the first embodiment, and therefore detailed description of the configuration will not be repeated.
  • FIG. 10 is a diagram showing a specific circuit configuration example of the power conversion device 100 according to the second embodiment.
  • the power conversion device 100 according to the second embodiment includes a first power conversion circuit 2B in place of the first power conversion circuit 2 and a third power conversion circuit 6B in place of the third power conversion circuit 6.
  • the first power conversion circuit 2B includes a DC/DC converter 20B including switching elements 221, 222 and a smoothing DC reactor 223.
  • the DC/DC converter 20B has a circuit configuration of a step-down chopper.
  • the DC power supply 12 as the input power supply 1 is connected to the input terminal of the first power conversion circuit 2B.
  • the DC/DC converter 20B shown in FIG. 10 has a step-down chopper circuit configuration, it may have a step-up type or step-up/down type circuit configuration, and also has an interleave configuration or a parallel connection configuration. It goes without saying that it is good.
  • the third power conversion circuit 6B includes switching elements 621 to 624 and AC reactors 625 and 626, and includes an inverter 60B that converts a DC voltage into an AC voltage.
  • the switching elements 621 to 624 are connected in a full bridge type.
  • One end of the AC reactor 625 is connected to a connection point between the switching element 621 and the switching element 622.
  • One end of the AC reactor 626 is connected to a connection point between the switching element 623 and the switching element 624.
  • a resistive load 71 is connected as the load 7 to the other ends of the AC reactors 625 and 626.
  • the AC reactors 625 and 626 are connected to both sides of the AC power supply, but may be connected to only one side. That is, only one of AC reactors 625 and 626 may be used.
  • the DC/DC converter 20B of the first power conversion circuit 2B shown in FIG. 10 has a configuration in which the input/output is opposite to that of the DC/DC converter 60 of the third power conversion circuit 6 shown in FIGS. 2 and 3.
  • the inverter 60B of the third power conversion circuit 6B shown in FIG. 10 has a configuration in which the input and output are opposite to those of the AC/DC converter 20 of the first power conversion circuit 2 shown in FIGS. 2 and 3. Therefore, when the power transmission direction in the first embodiment is defined as the forward direction and the opposite direction is defined as the reverse direction, the power conversion device 100 according to the second embodiment transmits the power in the reverse direction.
  • the power conversion device 100 is configured to be capable of bidirectionally transmitting power, it is possible to realize both the first embodiment and the second embodiment by the common power conversion device 100.
  • the current detector D1 detects the DC input current Idc flowing from the DC power supply 12 to the first power conversion circuit 2B.
  • the current detector D2 detects the AC output current iout flowing from the third power conversion circuit 6B to the resistance load 71.
  • the voltage detector D3 detects the DC input voltage Vdc supplied from the DC power supply 12 to the first power conversion circuit 2.
  • the voltage detector D4 detects the voltage Vint of the first DC capacitor 3.
  • the voltage detector D5 detects the voltage Vlink of the second DC capacitor 5.
  • the voltage detector D6 detects the AC output voltage vout given to the resistive load 71 from the third power conversion circuit 6.
  • the control unit 8 performs feedback calculation based on a part or all of the detection values given from the detectors D1 to D6, and controls on/off of each switching element.
  • the control unit 8 calculates a voltage difference between a predetermined target DC voltage Vint* and a detected value of the DC voltage Vint of the first DC capacitor 3, and uses the calculated voltage difference as a feedback amount for proportional control or proportional-integral control.
  • the output value is calculated by.
  • control unit 8 calculates a voltage difference between a predetermined target DC voltage Vlink* and a detected value of the DC voltage Vlink of the second DC capacitor 5, and performs proportional control or proportional control using the calculated voltage difference as a feedback amount. Output value is calculated by integral control.
  • control unit 8 sets a target obtained by multiplying the effective value Vout, rms* of the target AC output voltage, which is predetermined so that the output voltage to the resistive load 71 is a sine wave AC, by the sine wave voltage having an amplitude of ⁇ 2.
  • the voltage difference between the AC output voltage vout* and the AC output voltage vout is calculated, and the calculated voltage difference is used as a feedback amount to calculate the output by proportional control or proportional integral control.
  • the voltage Vint of the first DC capacitor 3 is controlled so as to follow the target DC voltage Vint*, and the voltage Vlink of the second DC capacitor 5 follows the target DC voltage Vlink*. It is controlled so that the AC output voltage vout follows the target AC output voltage vout*.
  • FIG. 11 is a diagram for explaining the initial operation in the second embodiment.
  • FIG. 11 shows the detected values of the DC input voltage Vdc, the voltage Vint of the first DC capacitor 3, the voltage Vlink of the second DC capacitor 5, and the AC output voltage vout.
  • the control unit 8 controls the voltage Vint of the first DC capacitor 3, the voltage Vlink of the second DC capacitor 5, and the AC output voltage vout to change as follows based on the detection results of the detectors D1 to D6. , And controls the first to third power conversion circuits 2B, 4, 6B.
  • the DC input voltage Vdc is applied to the input terminal of the first power conversion circuit 2B.
  • the first DC capacitor 3 is passively charged via the built-in diode or the external diode of each switching element of the first power conversion circuit 2B.
  • the voltage Vint of the first DC capacitor 3 rises to the initial charging voltage Vint0. It should be noted that time t1d and time t2d may substantially coincide with each other by instantaneously charging the voltage Vint of the first DC capacitor 3.
  • the switching operation of the first power conversion circuit 2B is started.
  • the effective duty ratio of the first power conversion circuit 2B is gradually increased, so that the voltage Vint of the first DC capacitor 3 is gradually increased.
  • the voltage Vint of the first DC capacitor 3 reaches the predetermined first threshold voltage Vint,th.
  • the switching operation of the second power conversion circuit 4 is started.
  • the first threshold voltage Vint,th satisfies the condition of Expression (4).
  • the first power conversion circuit 2B continues the normal operation (boosting operation). Can't do it. Specifically, the current path between the DC power supply 12 and the first DC capacitor 3 is fixed regardless of whether the switching elements 21 to 24 are turned on or off. Therefore, the voltage Vint of the first DC capacitor 3 needs to be maintained higher than the DC input voltage Vdc.
  • the switching operation of the second power conversion circuit 4 is started after the voltage Vint of the first DC capacitor 3 is raised to the first threshold voltage Vint,th by the first power conversion circuit 2B. It As a result, the switching operation of the second power conversion circuit 4 can be started in a state in which a certain margin is provided between the voltage Vint of the first DC capacitor 3 and the DC input voltage Vdc. Further, in the present embodiment, the effective duty ratio of the second power conversion circuit 4 is gradually increased from 0, and the current flowing from the first DC capacitor 3 to the second DC capacitor 5 is gradually increased from 0. .. As a result, a sharp drop in the voltage Vint of the first DC capacitor 3 due to the start of operation of the second power conversion circuit 4 is suppressed.
  • the voltage Vint of the first DC capacitor 3 is prevented from becoming lower than the DC input voltage Vdc, and the first power conversion circuit 2 can stably continue normal operation.
  • the first threshold voltage Vint,th is set to a value smaller than the target DC voltage Vint*, the voltage Vint of the first DC capacitor 3 is prevented from becoming an overvoltage, and the second power The time until the operation of the conversion circuit 4 starts can be shortened.
  • the voltage Vint of the first DC capacitor is controlled so as to follow the target DC voltage Vint*.
  • the second threshold voltage Vlink,th satisfies the condition of Expression (5). Note that “ ⁇ 2Vout*,rms” in the equation (5) corresponds to the maximum value of the target AC output voltage vout*.
  • the voltage Vlink of the second DC capacitor is controlled so as to follow the target DC voltage Vlink*.
  • the operations of the first to third power conversion circuits 2B, 4, 6B are started stepwise, whereby the first to third power conversion circuits 2B, 4, 4 are started.
  • the voltages of the first and second DC capacitors 3 and 5 can be individually controlled. Thereby, the voltage of the first and second DC capacitors 3 and 5 can be stably increased.
  • the voltage source load 72 may be used as the load 7, and similarly to the example of FIG. 8, the first power conversion circuit 2B and the third power conversion circuit 6B may be different from each other.
  • a circuit may be added, and as in the example of FIG. 9, another power conversion circuit may be connected to the first to third power conversion circuits 2B, 4, 6B.
  • FIG. 12 is a diagram illustrating an example in which at least a part of the functions of the control unit 8 is realized by software.
  • the control unit 8 includes a processing device (processor) 501 and a storage device (memory) 502.
  • the processing device 501 is, for example, a CPU (central processing unit), and realizes at least a part of the functions of the control unit 8 in the above-described embodiment by reading and executing a program stored in the storage device 502. You can

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  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

Selon la présente invention, un premier circuit de conversion de puissance convertit une tension provenant d'une alimentation électrique d'entrée en une tension continue et délivre la tension continue après la conversion. Un deuxième circuit de conversion de puissance est connecté au premier circuit de conversion de puissance par l'intermédiaire d'une première ligne de bus CC, transforme la sortie de tension continue du premier circuit de conversion de puissance, et délivre une tension continue après la transformation. Un troisième circuit de conversion de puissance est connecté au deuxième circuit de conversion de puissance par l'intermédiaire d'une seconde ligne de bus CC, convertit la tension continue délivrée par le deuxième circuit de conversion de puissance, et délivre une tension continue après la conversion à une charge. Un premier condensateur CC est connecté à la première ligne de bus CC, et un second condensateur CC est connecté à la seconde ligne de bus CC. Une unité de commande commande les premier, deuxième et troisième circuits de conversion de puissance de telle sorte que la puissance est fournie par le troisième circuit de conversion de puissance à la charge après que les premier, deuxième et troisième circuits de conversion de puissance ont démarré le fonctionnement par étapes, que la tension du premier condensateur CC a atteint une première tension seuil et que la tension du second condensateur CC a atteint une seconde tension seuil.
PCT/JP2018/046577 2018-12-18 2018-12-18 Dispositif de conversion de puissance WO2020129157A1 (fr)

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JP2019512015A JP6523592B1 (ja) 2018-12-18 2018-12-18 電力変換装置
PCT/JP2018/046577 WO2020129157A1 (fr) 2018-12-18 2018-12-18 Dispositif de conversion de puissance

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CN110429837A (zh) * 2019-08-02 2019-11-08 矽力杰半导体技术(杭州)有限公司 宽范围输入输出ac-dc变换器
JP7297972B1 (ja) * 2022-04-26 2023-06-26 日本航空電子工業株式会社 電源装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010226917A (ja) * 2009-03-25 2010-10-07 Honda Motor Co Ltd スイッチング電源装置
JP2017084716A (ja) * 2015-10-30 2017-05-18 三菱電機株式会社 点灯装置および照明器具
JP2018067985A (ja) * 2016-10-17 2018-04-26 コーセル株式会社 スイッチング電源装置及びその制御方法
JP2018074876A (ja) * 2016-11-04 2018-05-10 コーセル株式会社 スイッチング電源装置及びその制御方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010226917A (ja) * 2009-03-25 2010-10-07 Honda Motor Co Ltd スイッチング電源装置
JP2017084716A (ja) * 2015-10-30 2017-05-18 三菱電機株式会社 点灯装置および照明器具
JP2018067985A (ja) * 2016-10-17 2018-04-26 コーセル株式会社 スイッチング電源装置及びその制御方法
JP2018074876A (ja) * 2016-11-04 2018-05-10 コーセル株式会社 スイッチング電源装置及びその制御方法

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