WO2016136634A1 - Dispositif de conversion de puissance et système de conversion de puissance - Google Patents

Dispositif de conversion de puissance et système de conversion de puissance Download PDF

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Publication number
WO2016136634A1
WO2016136634A1 PCT/JP2016/054920 JP2016054920W WO2016136634A1 WO 2016136634 A1 WO2016136634 A1 WO 2016136634A1 JP 2016054920 W JP2016054920 W JP 2016054920W WO 2016136634 A1 WO2016136634 A1 WO 2016136634A1
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WIPO (PCT)
Prior art keywords
converter
input
proportional
power conversion
control
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PCT/JP2016/054920
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English (en)
Japanese (ja)
Inventor
洋平 久保田
圭一 石田
治信 温品
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東芝キヤリア株式会社
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Priority to JP2017502332A priority Critical patent/JP6295006B2/ja
Publication of WO2016136634A1 publication Critical patent/WO2016136634A1/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
    • 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
    • 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
    • H02M7/219—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 in a bridge configuration
    • 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
    • H02M7/23—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 arranged for operation in parallel

Definitions

  • Embodiments of the present invention relate to a power conversion device including a converter that converts a voltage of an AC power source into DC, and a power conversion system including a plurality of the power conversion devices.
  • the converter is equipped with a converter that converts the voltage of the AC power source into DC and has a boosting function by switching.
  • the converter is switched so that the output voltage of the converter becomes a target value and the input current to the converter becomes a sine wave.
  • a power conversion device that performs feedback control is known.
  • the converter includes a plurality of reactors inserted into a connection line with an AC power source, a plurality of diodes for rectifying a voltage input through the reactors, and a switching element connected in parallel to the diodes. Boosting is performed by turning on / off the switching element.
  • a noise filter is arranged on the power supply line between the AC power supply and the converter.
  • a power source line impedance exists in the power source line between the AC power source and the power converter, and a resonance circuit is formed by the inductor component of the power source line impedance, the reactor and capacitor of the noise filter, the reactor of the PWM converter, and the like. .
  • This resonant circuit has a resonant frequency determined by the inductance and the capacitance of the capacitor.
  • An object of an embodiment of the present invention is to provide a power conversion device and a power conversion system that can avoid an overvoltage on the input side.
  • the power conversion device converts the voltage of the AC power source into DC and has a boosting function by switching, and feedback controls switching of the converter so that the output voltage of the converter becomes a target value.
  • a power conversion system includes a plurality of power conversion apparatuses according to any one of the first to fifth aspects and a system control unit that controls the power conversion apparatuses.
  • the system control unit executes load limitation to reduce an input current to at least one power conversion device among the power conversion devices when a reduction in control gain is continued in any of the power conversion devices, When the reduction of the control gain continues despite the load limitation, the operation number limitation for reducing the operation number of each power converter is executed.
  • FIG. 1 is a block diagram showing the configuration of the first embodiment.
  • FIG. 2 is a block diagram showing the configuration of the PI controller in the first embodiment.
  • FIG. 3 is a flowchart showing the control of the first embodiment.
  • FIG. 4 is a diagram showing how the input voltage, input current, reactor current, sine wave signal, and voltage deviation change when the proportional control gain in the first embodiment is increased.
  • FIG. 5 is a diagram showing the relationship between the harmonic order and the harmonic current in the first embodiment using the proportional control gain as a parameter.
  • FIG. 6 is a diagram illustrating an input voltage, an input current, a sine wave signal, and a voltage deviation when there is no control vibration in the second embodiment.
  • FIG. 1 is a block diagram showing the configuration of the first embodiment.
  • FIG. 2 is a block diagram showing the configuration of the PI controller in the first embodiment.
  • FIG. 3 is a flowchart showing the control of the first embodiment.
  • FIG. 4 is a diagram showing how the input voltage, input current,
  • FIG. 7 is a diagram illustrating an input voltage, an input current, a sine wave signal, and a voltage deviation when there is a control vibration in the second embodiment.
  • FIG. 8 is a flowchart showing the control of the second embodiment.
  • FIG. 9 is a block diagram showing the configuration of the third embodiment.
  • FIG. 10 is a flowchart showing the control of the third embodiment.
  • a power converter 3 is connected to a three-phase AC power source 1, and a load, for example, a brushless DC motor 8 is connected to the output end of the power converter 3.
  • the brushless DC motor 8 drives a compressor of a refrigeration cycle, for example.
  • power supply line impedances 2r, 2s, and 2t exist in each power supply line between the three-phase AC power supply 1 and the power conversion device 3.
  • the power converter 3 includes a noise filter 4, a PWM converter 5, a smoothing capacitor 6, an inverter 7, current sensors 14, 15, 16, a converter control unit 30, a main control unit 50, and a voltage detection unit 51.
  • the noise filter 4 includes reactors Lr, Ls, Lt and line capacitors Crs, Cst, Ctr, and removes noise superimposed on the power supply voltage when the PWM converter 5 is switched.
  • the PWM converter 5 is connected in parallel to a plurality of reactors 11, 12, 13, a bridge circuit of a plurality of diodes 21 a to 26 a for full-wave rectification of the input voltage via these reactors 11, 12, 13, and these diodes 21 a to 26 a.
  • Switching elements such as MOSFETs 21 to 26, a DC conversion function using diodes 21a to 26a, and functions such as boosting, harmonic suppression, and power factor improvement by turning on and off MOSFETs 21 to 26.
  • the AC voltage can be converted to a DC voltage of 300V.
  • the diodes 21a to 26a are parasitic diodes of the MOSFETs 21 to 26.
  • the inverter 7 converts the output voltage (voltage of the smoothing capacitor 6) Vdc of the PWM converter 5 into a three-phase AC voltage having a predetermined frequency and outputs it.
  • the speed (rotation speed) of the brushless DC motor 8 changes according to the frequency (output frequency) F of the output voltage of the inverter 7.
  • Current sensors 14, 15, 16 detect currents (reactor currents) Ir 1, Is 1, It 1 flowing in reactors 11, 12, 13 of PWM converter 5.
  • Converter control unit 30 feedback controls switching of PWM converter 5 so that output voltage Vdc of PWM converter 5 becomes target value Vdcref. Specifically, the converter control unit 30 follows the sine wave signal Vrref, in which the voltage level is determined according to the difference between the output voltage Vdc of the PWM converter 5 and the target value Vdcref while the period follows the input current to the PWM converter 5.
  • PWM for switching the MOSFETs 21 to 26 of the PWM converter 5 by generating Vsref and Vtref and performing pulse width modulation (voltage comparison) of the triangular carrier signal having a predetermined frequency with the generated sine wave signals Vrref, Vsref and Vtref. A signal (pulse signal) is generated.
  • the converter control unit 30 includes a subtraction unit 31, a PI controller 32, a current detection unit 33, subtraction units 34 and 35, PI controllers 36 and 37, a sine wave signal generation unit 38, a PWM signal.
  • a vector control unit including a generation unit 39 and a zero cross detection unit 40 is included.
  • the subtracting unit 31 obtains a voltage deviation ⁇ Vdc between the output voltage Vdc of the PWM converter 5 and the target value Vdcref.
  • the target value Vdcref is a target value for the output voltage Vdc of the PWM converter 5 and is commanded from the main control unit 50 described later.
  • the PI controller 32 obtains an effective current target value Idref for the input current to the PWM converter 5 by proportional / integral calculation (first proportional / integral calculation) with the voltage deviation ⁇ Vdc as an input.
  • the current detector 33 takes the detected currents (reactor currents) Ir1, Is1, It1 of the current sensors 14, 15, 16 as input currents to the PWM converter 5, and uses the input currents as effective currents (d-axis currents) Id and Coordinates are converted to a reactive current (q-axis current) Iq.
  • the subtracting unit 34 obtains a current deviation ⁇ Id between the effective component current Id and the effective component current target value Idref.
  • the PI controller 36 obtains an effective divided voltage operation value Vd for the output voltage Vdc of the PWM converter 5 by proportional / integral calculation (second proportional / integral calculation) with the current deviation ⁇ Id as an input.
  • the PI controller 37 obtains an invalid divided voltage operation value Vq for the output voltage Vdc of the PWM converter 5 by proportional / integral calculation (third proportional / integral calculation) with the current deviation ⁇ Iq as an input.
  • the sine wave signal generation unit 38 generates sine wave signals Vrref, Vsref, and Vtref whose voltage levels are determined according to the effective divided voltage operation value Vd and the invalid divided voltage operation value Vq while following the period of the input current to the PWM converter 5. Generate.
  • the PWM signal generation unit 39 performs pulse width modulation (voltage comparison) of a triangular wave carrier signal having a predetermined frequency with the sine wave signals Vrref, Vsref, and Vtref, thereby switching PWM signals (for the MOSFETs 21 to 26 of the PWM converter 5). Pulse signal).
  • the zero cross detection unit 40 detects the zero cross point ⁇ of the input voltages Vr, Vs, Vt to the PWM converter 5 and supplies the detection result to the current detection unit 33 and the sine wave signal generation unit 38.
  • PI controller 32 becomes a voltage control system
  • PI controllers 36 and 37 become a current control system.
  • the basic configuration of these PI controllers 32, 36, and 37 is shown in FIG. Kp is a proportional control gain
  • Ki is an integral control gain.
  • the proportional control gain Kp and the integral control gain Ki are optimum values obtained by a test or the like.
  • the voltage detector 51 detects the R-phase input voltage Vr with reference to the potential of the negative terminal of the smoothing capacitor 6.
  • the main control unit 50 includes a microcomputer programmed with various control operations, and reduces the control gain of feedback control of the converter control unit 30 when vibration (control vibration) occurs in the input to the PWM converter 5. Specifically, the main control unit 50 determines that control vibration is occurring when the R-phase input voltage Vr to the PWM converter 5 is equal to or higher than the threshold value Vr2, and this detection detects the PI controller 36 of the current control system. , 37 is reduced by a predetermined value ⁇ Kp. Thereafter, the main control unit 50 cancels the reduction of the proportional control gain Kp when the R-phase input voltage Vr drops below the threshold value Vr1 ( ⁇ Vr2).
  • the main control unit 50 compares the R-phase input voltage Vr with the threshold value Vr2 (step S2).
  • the gain reduction flag f indicates “1” while the gain is being reduced, and indicates “0” when the gain is not being reduced.
  • FIG. 4 shows how the R-phase input voltage Vr, the R-phase input current Ir, the reactor current Ir1, the sine wave signal Vrref, and the voltage deviation ⁇ Vdc are increased when the proportional control gain Kp of the PI controllers 36 and 37 is increased (swept). This is the result of testing to see if such changes occur.
  • the proportional control gain Kp increases, the vibration generated in the sine wave signal Vrref increases, and the vibration of the R-phase input current Ir and the reactor current Ir1 also increases as a result.
  • This control vibration so-called control vibration, also appears when the hunting generated in the output voltage Vdc of the PWM converter 5 increases, for example, when the step-up rate of the PWM converter 5 increases.
  • the main control unit 50 sets the proportional control gain Kp of the PI controllers 36 and 37 to a predetermined value ⁇ Kp under the determination that control vibration has occurred. (Step S3). Then, the main control unit 50 sets the gain reduction flag f to “1” (step S4), and returns to the determination of step S1.
  • the main control unit 50 compares the R-phase input voltage Vr with the threshold value Vr1 ( ⁇ Vr2) (step S5). If the R-phase input voltage Vr has not decreased below the threshold value Vr1 (NO in step S5), the main control unit 50 returns to the determination in step S1 while the proportional control gain Kp is reduced by the predetermined value ⁇ Kp.
  • the proportional control gain Kp by reducing the proportional control gain Kp by the predetermined value ⁇ Kp, the response time is lowered and the time until the output voltage Vdc reaches the target value Vdcref is delayed, but the occurrence of control vibration can be suppressed. it can.
  • step S5 determines that the PI controller 36, The proportional control gain Kp of 37 is increased by a predetermined value ⁇ Kp and returned to the original value (step S6). The speed of increase at this time is made slower than the speed at the time of reduction so that control vibration does not occur again. Then, the main control unit 50 resets the gain reduction flag f to “0” (step S7), and returns to the determination of step S1.
  • the determination result in step S1 is YES and the determination result in step S2 is NO, the main control unit 50 does not change the proportional control gain Kp and the gain reduction flag f and returns to the determination in step S1. .
  • Power supply line impedances 2r, 2s, and 2t exist on the power supply line between the three-phase AC power supply 1 and the power converter 3, and the inductor components of the power supply line impedances 2r, 2s, and 2t, the reactor Lr,
  • a resonance circuit is formed by Ls, Lt, line-to-line capacitors Crs, Cst, Ctr, and reactors 11, 12, 13 of the PWM converter 5.
  • This resonance circuit has a resonance frequency fo determined by an inductance and a capacitor capacity. In such a circuit, when a control vibration is generated on the input side of the PWM converter 5, the frequency of the control vibration is dragged to the resonance frequency fo. As a result, an overvoltage is generated on the input side of the PWM converter 5. This overvoltage adversely affects other electrical devices connected to the same three-phase AC power source 1.
  • the proportional control gain Kp of the PI controllers 36 and 37 is reduced. 5 can be prevented from occurring on the input side.
  • FIG. 5 shows the relationship between the harmonic current generated by switching of the PWM converter 5 and the harmonic order, with the proportional control gain Kp (Kp1 ⁇ Kp2 ⁇ Kp3 ⁇ Kp4) as a parameter.
  • the harmonic suppression effect decreases when the proportional control gain Kp is small.
  • the main control unit 50 determines whether or not control vibration has occurred in the input to the PWM converter 5 from the fluctuation range of each control cycle ⁇ t of the sine wave signal Vrref. The control of the main control unit 50 will be described with reference to the flowchart of FIG.
  • the main control unit 50 detects the fluctuation range ⁇ D for each control cycle ⁇ t of the sine wave signal Vrref generated by the sine wave signal generation unit 38 (step S11). When the gain reduction flag f is “0” (YES in step S12), the main control unit 50 compares the detected fluctuation width ⁇ D with the threshold value ⁇ D2 (step S13).
  • the main control unit 50 reduces the proportional control gain Kp of the PI controllers 36 and 37 by a predetermined value ⁇ Kp based on the determination that the control vibration has occurred. (Step S14). Then, the main control unit 50 sets the gain reduction flag f to “1” (step S15), and returns to the fluctuation range ⁇ D detection in step S11.
  • the main control unit 50 compares the fluctuation range ⁇ D with the threshold value ⁇ D1 ( ⁇ D2) (step S16). When the fluctuation range ⁇ D has not decreased below the threshold value ⁇ D1 (NO in step S16), the main control unit 50 returns to the detection of the fluctuation range ⁇ D in step S11.
  • the main control unit 50 sets the proportional control gain Kp of the PI controllers 36 and 37 to a predetermined value ⁇ Kp under the determination that the control vibration has subsided. Is increased to the original value (step S17). The speed of increase at this time is made slower than the speed at the time of reduction so that control vibration does not occur again. Then, the main control unit 50 resets the gain reduction flag f to “0” (step S18), and returns to the fluctuation range ⁇ D detection in step S11.
  • the main control unit 50 of each of the power conversion devices 3a to 3n is connected to an external system control unit 60 via a communication line, and can communicate with the system control unit 60.
  • the main control unit 50 transmits a reduction status of the proportional control gain Kp to the system control unit 60.
  • the system control unit 60 can instruct the main control unit 50 to start and stop the power conversion devices 3a to 3n and to execute load restriction that reduces the input current.
  • the brushless DC motors 8a to 8n respectively drive a plurality of compressors mounted on, for example, one heat pump heat source device.
  • the power conversion devices 3a to 3n and the system control unit 60 constitute a power conversion system.
  • the system control unit 60 includes a microcomputer programmed with various control operations, and includes a first control unit 60a, a second control unit 60b, and a third control unit 60c as its main functions.
  • the first control unit 60a controls the number of operating power converters 3a to 3n in accordance with the load size of the heat pump heat source machine on which the brushless DC motors 8a to 8n are mounted.
  • the second control unit 60b transfers to at least one of the operating power conversion devices 3a to 3n. Perform load limiting to reduce the input current.
  • the third control unit 60c when the reduction of the proportional control gain Kp is continued despite the load limitation by the second control unit 60b, the number of the PWM converters 5 in the operating power converters 3a to 3n (step-up operation) The number of operating units is reduced to reduce the number of units).
  • the system control unit 60 monitors whether there is a reduction in the proportional control gain Kp for avoiding control vibration in any of the operating power conversion devices 3a to 3n (step S21). For example, when the power conversion device 3a detects that the proportional control gain Kp is reduced (YES in step S21), the system control unit 60 starts the time count t1 from zero (step S22), and the time count t1 And a predetermined set time t1s (for example, 10 seconds) are compared (step S23).
  • step S23 When the time count t1 does not reach the set time t1s (NO in step S23), the system control unit 60 returns to the monitoring in step S21.
  • the reduction of the proportional control gain Kp in the power conversion device 3a is canceled before the time count t1 reaches the set time t1s (NO in step S23) (NO in step S21)
  • the system control unit 60 Returning to the monitoring in step S21.
  • the system control unit 60 determines the power during operation. Load limiting is performed to reduce input currents Ira, Isa, Ita to at least one of the conversion devices 3a to 3n, for example, the power conversion device 3a (step S24). That is, the system control unit 60 reduces the output frequency F of the inverter 7 in the power converter 3a, thereby reducing the speed of the brushless DC motor 8a and limiting the load of the power converter 3a. As a result, the input currents Ira, Isa, Ita to the power converter 3a are reduced.
  • the system control unit 60 starts the time count t2 with the execution of the load restriction (step S25), and compares the time count t2 with the set time t2s (step S26). When the time count t2 reaches the set time t2s (YES in step S26), the system control unit 60 monitors whether the reduction of the proportional control gain Kp in the power conversion device 3a has been canceled (step S27). .
  • step S27 When the reduction of the proportional control gain Kp in the power conversion device 3a is released (YES in step S27), the system control unit 60 releases the load restriction (step S28). Then, the system control unit 60 returns to the determination in step S21.
  • the system control unit 60 sets the number of boosting operation units of the PWM converter 5 in the power conversion devices 3a to 3n in operation, for example, one unit. Only a limited number of operating units is executed (step S29). Note that the PWM converter 5 performs full-wave rectification with a diode even when the boost operation by switching is not performed, so that the operation of the brushless DC motor 8 can be continued.
  • the system control unit 60 starts the time count t3 in accordance with the execution of the operation number limit (step S30), and compares the time count t3 with the set time t3s (step S31). When the time count t3 reaches the set time t3s (NO in step S31), the system control unit 60 monitors whether the reduction of the proportional control gain Kp in the power conversion device 3a has been canceled (step S32). .
  • step S32 When the reduction of the proportional control gain Kp in the power conversion device 3a is cancelled (YES in step S32), the system control unit 60 cancels the operation number limit (step S33) and returns to the determination in step S33.
  • the system control unit 60 further reduces the number of boosting operations of the PWM converter 5 in the power conversion devices 3a to 3n by one. (Step S29). The system control unit 60 repeats this reduction in the number of units until the reduction of the proportional control gain Kp in the power conversion device 3a is cancelled. Eventually, the number of boosting operations of the PWM converter 5 becomes zero. When the number of boosting operations is zero, the switching operation of the PWM converter 5 in all the power converters 3a to 3n is stopped, so that the control vibration is naturally eliminated.
  • SYMBOLS 1 Three-phase alternating current power supply, 2r, 2s, 2t ... Power supply line impedance, 3 ... Power converter, 4 ... Noise filter, 5 ... PWM converter, 6 ... Smoothing capacitor, 7 ... Inverter, 8 ... Brushless DC motor (load) , 11, 12, 13 ... reactor, 21-26 ... IGBT, 30 ... converter control unit, 50 ... main control unit, 51 ... voltage detection unit, 3a, 2b, 2c ... power converter, 60 ... system control unit

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)
  • Inverter Devices (AREA)
  • Dc-Dc Converters (AREA)

Abstract

Selon la présente invention, la commutation d'un convertisseur est soumise à une commande de rétroaction de telle sorte que la tension de sortie du convertisseur devient une valeur cible. Dans un cas où une oscillation a lieu lors de l'entrée dans le convertisseur, le gain de commande de la commande de rétroaction est réduit.
PCT/JP2016/054920 2015-02-25 2016-02-19 Dispositif de conversion de puissance et système de conversion de puissance WO2016136634A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017163451A1 (fr) * 2016-03-25 2017-09-28 東芝キヤリア株式会社 Dispositif de pompe à chaleur
JP2019022401A (ja) * 2017-07-21 2019-02-07 日本リライアンス株式会社 Ｐｗｍコンバータ制御装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08214550A (ja) * 1995-02-01 1996-08-20 Hitachi Ltd Ｐｗｍコンバータの制御装置
JP2014220954A (ja) * 2013-05-10 2014-11-20 三菱電機株式会社 電力変換装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08214550A (ja) * 1995-02-01 1996-08-20 Hitachi Ltd Ｐｗｍコンバータの制御装置
JP2014220954A (ja) * 2013-05-10 2014-11-20 三菱電機株式会社 電力変換装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017163451A1 (fr) * 2016-03-25 2017-09-28 東芝キヤリア株式会社 Dispositif de pompe à chaleur
JPWO2017163451A1 (ja) * 2016-03-25 2018-12-06 東芝キヤリア株式会社 ヒートポンプ機器
US10928112B2 (en) 2016-03-25 2021-02-23 Toshiba Carrier Corporation Heat pump device
JP2019022401A (ja) * 2017-07-21 2019-02-07 日本リライアンス株式会社 Ｐｗｍコンバータ制御装置

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