WO2018127945A1 - 電力変換装置 - Google Patents

電力変換装置 Download PDF

Info

Publication number
WO2018127945A1
WO2018127945A1 PCT/JP2017/000035 JP2017000035W WO2018127945A1 WO 2018127945 A1 WO2018127945 A1 WO 2018127945A1 JP 2017000035 W JP2017000035 W JP 2017000035W WO 2018127945 A1 WO2018127945 A1 WO 2018127945A1
Authority
WO
WIPO (PCT)
Prior art keywords
bus
converter
voltage
power
level converter
Prior art date
Application number
PCT/JP2017/000035
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
俊秀 中野
Original Assignee
東芝三菱電機産業システム株式会社
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.)
Filing date
Publication date
Application filed by 東芝三菱電機産業システム株式会社 filed Critical 東芝三菱電機産業システム株式会社
Priority to KR1020197011168A priority Critical patent/KR20190049878A/ko
Priority to PCT/JP2017/000035 priority patent/WO2018127945A1/ja
Priority to JP2018560275A priority patent/JPWO2018127945A1/ja
Publication of WO2018127945A1 publication Critical patent/WO2018127945A1/ja

Links

Images

Classifications

    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0064—Magnetic structures combining different functions, e.g. storage, filtering or transformation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • 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
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without 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
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H02M7/08—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode arranged for operation in parallel
    • 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

Definitions

  • This invention relates to a power converter.
  • Patent Document 1 discloses an injection molding machine including a motor, a drive circuit for driving the motor, a rectifier, a capacitor, a bridge circuit, and a harmonic component suppression unit. Is done.
  • the rectifying unit converts AC power from the AC power source into DC power and supplies the DC power to the drive circuit.
  • the capacitor is provided between the drive circuit and the rectifying unit.
  • the bridge circuit is configured to convert DC power between the drive circuit and the rectifying unit into AC power.
  • the harmonic component suppression unit is connected to the AC unit side of the bridge circuit.
  • the bridge circuit and the harmonic component suppression unit are connected in parallel to the rectification unit and form a regeneration path for supplying regenerative power generated by the motor to the AC power source.
  • the harmonic component suppression unit has a reactor.
  • Patent Document 1 In order to suppress the circulating current, in Patent Document 1, when a capacitor voltage is equal to or higher than a predetermined value, a plurality of switching elements constituting a bridge circuit are turned on and off so as to regenerate motor power. On the other hand, when the voltage of the capacitor is less than the predetermined value, all the plurality of switching elements constituting the bridge circuit are turned off.
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a power converter that can suppress a circulating current and is advantageous for downsizing.
  • the power conversion device includes a three-level converter, an inverter, two capacitors, a diode rectifier, and a control device.
  • the three-level converter is configured to convert an AC voltage supplied from an AC power source via an AC line into a DC voltage.
  • the inverter is configured to convert a DC voltage supplied from a three-level converter via a DC positive bus, a DC negative bus, and a DC neutral point bus into an AC voltage and supply the AC voltage to a load.
  • the two capacitors are connected between the DC positive bus and the DC neutral point bus, and between the DC neutral point bus and the DC negative bus.
  • the diode rectifier is connected in parallel with the three-level converter between the AC line and the DC positive bus and the DC negative bus.
  • the control device controls the 3-level converter so that the DC voltage supplied to the inverter becomes a reference voltage higher than the DC voltage to be output from the diode rectifier, while the 3-level converter is gated when the 3-level converter fails. Configured to block.
  • FIG. 5 is a circuit diagram showing a configuration of a conventional power converter 110.
  • power conversion device 110 is connected between three-phase AC power supply 1 and load 4.
  • the load 4 is a motor, for example, and is driven by three-phase AC power supplied from the power converter 110.
  • the load 4 can alternately perform a power running operation and a regenerative operation.
  • the power conversion device 110 includes a diode rectifier 2, a capacitor C0, an inverter 3, a two-level converter 8, a filter 5, and a control device 7.
  • Power conversion device 110 further includes DC positive bus 13, DC negative bus 14, and AC lines (R-phase line RL, S-phase line SL, and T-phase line TL).
  • the diode rectifier 2 is configured to convert three-phase AC power supplied from the three-phase AC power source 1 via the AC lines RL, SL, and TL into DC power.
  • the diode rectifier 2 includes diodes D1 to D6.
  • Diode D1 has an anode connected to R-phase line RL and a cathode connected to DC positive bus 13.
  • Diode D2 has a cathode connected to R-phase line RL and an anode connected to DC negative bus 14.
  • Diode D3 has an anode connected to S-phase line SL and a cathode connected to DC positive bus 13.
  • Diode D4 has a cathode connected to S-phase line SL and an anode connected to DC negative bus 14.
  • Diode D5 has an anode connected to T-phase line TL and a cathode connected to DC positive bus 13.
  • Diode D6 has a cathode connected to T-phase line TL and an anode connected to DC negative bus 14.
  • Capacitor C0 smoothes the DC voltage between DC positive bus 13 and DC negative bus 14.
  • the inverter 3 converts the DC power supplied from the diode rectifier 2 through the DC positive bus 13 and the DC negative bus 14 into three-phase AC power.
  • the three-phase AC power generated by the inverter 3 is supplied to the load 4 via AC lines (U-phase line UL, V-phase line VL, W-phase line WL).
  • the 2-level converter 8 is connected in parallel to the diode rectifier 2 between the AC lines RL, SL, TL and the DC positive bus 13 and the DC negative bus 14.
  • the two-level converter 8 converts the three-phase AC power supplied from the three-phase AC power source 1 into DC power, and supplies the DC power to the inverter 3 via the DC positive bus 13 and the DC negative bus 14.
  • the inverter 3 and the two-level converter 8 are constituted by a semiconductor switch including a semiconductor switching element.
  • a semiconductor switch including a semiconductor switching element.
  • an IGBT Insulated Gate Bipolar Transistor
  • PWM Pulse Width Modulation
  • 2 level converter 8 includes IGBT elements Q1r, Q2r, Q1s, Q2s, Q1t, Q2t and diodes D1r, D2r, D1s, D2s, D1t, D2t.
  • the emitter of IGBT element Q1x is connected to x-phase line xL, and its collector is connected to DC positive bus 13.
  • IGBT element Q2x has a collector connected to x-phase line xL and an emitter connected to DC negative bus 14.
  • Diodes D1x and D2x are connected in antiparallel to IGBT elements Q1x and Q2x, respectively.
  • the filter 5 is provided between the AC lines RL, SL, TL and the two-level converter 8.
  • Filter 5 includes at least a reactor inserted in series with respect to each phase of AC lines RL, SL, and TL.
  • Filter 5 is, for example, an LC circuit in which a reactor inserted in series with respect to each phase of AC lines RL, SL, and TL is connected to a capacitor.
  • the filter 5 constitutes a harmonic component suppression unit.
  • the control device 7 controls the operation of the inverter 3 and the two-level converter 8.
  • the control device 7 executes PWM control.
  • the diode rectifier 2 and the two-level converter 8 are connected in parallel to the AC lines RL, SL, and TL. Therefore, when the semiconductor switching element of the two-level converter 8 is turned on, the current flowing from the AC line to the DC bus through the diode rectifier 2 passes through the two-level converter 8 and the filter 5 as indicated by an arrow k1 in the figure. Thus, a route that returns to the AC line is formed. Alternatively, as indicated by an arrow k2 in the figure, a path is formed in which current flowing from the AC line through the filter 5 and the two-level converter 8 to the DC bus is returned to the AC line through the diode rectifier 2. This current is called circulating current and causes power loss.
  • the semiconductor switching element of the two-level converter 8 is turned on and off so that the power generated in the load 4 is regenerated when the voltage between the terminals of the capacitor C0 is a predetermined value or more.
  • the semiconductor switching element of the two-level converter 8 is turned off when the inter-terminal voltage of the capacitor C0 is less than a predetermined value.
  • the two-level converter 8 since the two-level converter 8 is stopped during the power running operation of the load 4, the three-phase AC power from the three-phase AC power source 1 is converted into DC power by the diode rectifier 2. Further, during the regenerative operation of the load 4, the DC power between the DC positive bus 13 and the DC negative bus 14 is converted into three-phase AC power by the two-level converter 8.
  • FIG. 1 is a circuit diagram showing a configuration of a power conversion device 100 according to Embodiment 1 of the present invention.
  • power conversion device 100 according to the first embodiment is obtained by replacing 2-level converter 8 in conventional power conversion device 110 with 3-level converter 6. That is, the three-level converter 6 is connected in parallel to the diode rectifier 2 between the AC lines RL, SL, TL and the DC positive bus 13 and the DC negative bus 14.
  • the three-level converter 6 converts the three-phase AC power supplied from the three-phase AC power source 1 through the filter 5 into DC power, and supplies the DC power to the inverter 3 via the DC positive bus 13 and the DC negative bus 14. Supply.
  • the filter 5 includes a capacitor unit 50 and a reactor unit 52.
  • Reactor unit 52 includes reactors 52r, 52s, and 52t inserted in series in AC lines RL, SL, and TL, respectively.
  • Capacitor unit 50 includes capacitors 50r, 50s, and 50t each having one end connected to AC lines RL, SL, and TL. Filter 5 may be configured such that only a reactor is inserted in series in each of AC lines RL, SL, and TL.
  • 3 level converter 6 includes IGBT elements Q1r, Q2r, Q1s, Q2s, Q1t, Q2t, diodes D1r, D2r, D1s, D2s, D1t, D2t, and AC switches S1 to S3.
  • the three-level converter 6 is obtained by adding AC switches S1 to S3 to the two-level converter 8 of FIG.
  • Each of AC switches S1-S3 includes IGBT elements Q3, Q4 and diodes D3, D4.
  • the symbols r, s, and t are collectively indicated as a symbol “x”.
  • the source of the IGBT element Q3 is connected to a connection point between the IGBT element Q1x and the IGBT element Q2x.
  • the source of IGBT element Q4 is connected to neutral point N1, which is the connection point of capacitors C1 and C2.
  • a DC neutral point bus 15 is connected to the neutral point N1.
  • the drains of IGBT elements Q3 and Q4 are connected to each other. Diodes D3 and D4 are connected in antiparallel to IGBT elements Q3 and Q4, respectively.
  • Each of the IGBT elements Q1x, Q2x, Q3, and Q4 is PWM-controlled by the control device 7, and is turned on / off at a predetermined timing in synchronization with the three-phase AC voltage supplied from the three-phase AC power source 1.
  • IGBT elements Q1r, Q1s, Q1t are sequentially turned on / off in synchronization with a three-phase AC voltage.
  • the IGBT elements Q2r, Q2s, Q2t are turned off during the period when the IGBT elements Q1r, Q1s, Q1t are turned on, respectively, and the IGBT elements Q2r, Q2s, Q2t are turned on during the period when the IGBT elements Q1r, Q1s, Q1t are turned off, respectively. Is done.
  • the three-level converter 6 generates a positive voltage, a negative voltage, and a neutral point voltage based on the three-phase AC voltage supplied from the three-phase AC power source 1 via the filter 5, and generates the generated positive voltage, negative voltage, and medium voltage.
  • the neutral point voltage is applied to the DC positive bus 13, the DC negative bus 14 and the DC neutral point bus 15, respectively.
  • FIG. 2 is a signal waveform diagram for explaining the PWM control for one phase of the three-level converter 6 by the control device 7.
  • Gate signals ⁇ 1 to ⁇ 4 are applied to the gates of IGBT elements Q1x to Q4x, respectively.
  • FIG. 2 shows waveforms of the voltage command value V *, the positive triangular wave carrier signal CA1, the negative triangular wave carrier signal CA2, and the gate signals ⁇ 1 to ⁇ 4.
  • the voltage command value V * is an AC voltage command value to be output by the three-level converter 6.
  • the periods and phases of carrier signals CA1 and CA2 are the same.
  • the period of carrier signals CA1 and CA2 is sufficiently smaller than the period of voltage command value V *.
  • the level of voltage command value V * and carrier signal CA1 are compared.
  • gate signals ⁇ 1 and ⁇ 3 are set to the H level and the L level, respectively.
  • gate signals ⁇ 1 and ⁇ 3 are set to L level and H level, respectively.
  • gate signals ⁇ 1 and ⁇ 3 are alternately set to H level in synchronization with carrier signal CA1, and IGBT elements Q1x and Q3x are alternately turned on.
  • gate signals ⁇ 1 and ⁇ 3 are fixed at L level and H level, respectively, and IGBT element Q1x is fixed in the off state and IGBT element Q3x is in the on state. Fixed.
  • the level of voltage command value V * and carrier signal CA2 are compared. When the level of voltage command value V * is higher than the level of carrier signal CA2, gate signals ⁇ 2 and ⁇ 4 are set to L level and H level, respectively. When the level of voltage command value V * is lower than the level of carrier signal CA1, gate signals ⁇ 2 and ⁇ 4 are set to the H level and the L level, respectively.
  • gate signals ⁇ 2 and ⁇ 4 are fixed at L level and H level, respectively, and IGBT element Q2x is fixed in the off state and IGBT element Q4x is in the on state. Fixed. Further, during the period when the level of voltage command value V * is negative, it is alternately set to H level in synchronization with gate signals ⁇ 2, ⁇ 4 and carrier signal CA2, and IGBT elements Q2x, Q4x are alternately turned on.
  • control device 7 is configured to control ON / OFF of the semiconductor switching element of three-level converter 6 so that the DC voltage between DC positive bus 13 and DC negative bus 14 matches the reference voltage. Is done.
  • the reference voltage is set to a voltage higher than the DC voltage that the diode rectifier 2 should output.
  • the output AC voltage of the three-phase AC power supply 1 is 400V
  • the output DC voltage of the diode rectifier 2 is about 566V.
  • the reference voltage is higher than 566V and is set to 700V, for example.
  • the diode rectifier 2 when the three-level converter 6 is operating normally, the diode rectifier 2 is in a state where the DC output voltage is higher than the AC input voltage, and thus the rectification operation is not performed. Accordingly, since the diode rectifier 2 is stopped during the power running operation of the load 4, the three-phase AC power from the three-phase AC power source 1 is converted into DC power by the three-level converter 6.
  • the DC power between the DC positive bus 13 and the DC negative bus 14 is converted into three-phase AC power by the three-level converter 6. That is, in the first embodiment, the semiconductor switching element of the three-level converter 6 is turned off during the power running operation of the load 4, and all the semiconductor switching elements of the two-level converter 8 are turned off during the power running operation (see FIG. 5). ) Is different.
  • the diode rectifier 2 can be operated to supply DC power to the inverter 3.
  • the DC voltage supplied to the inverter 3 is a voltage (for example, 566 V) lower than a reference voltage (for example, 700 V).
  • the semiconductor switching element of the three-level converter 6 when the semiconductor switching element of the three-level converter 6 is turned on, the AC line, the diode rectifier 2, the DC positive bus 13, the DC negative bus 14, and the three-level converter 6 are the same as in the two-level converter 8 of FIG. A path through which the circulating current flows is formed.
  • the three-level converter 6 can output ternary voltages (positive voltage, negative voltage, and neutral point voltage)
  • the two-level converter 8 that outputs binary voltages (positive voltage and negative voltage). Compared to the above, there is a feature that there are few harmonic components.
  • the change width of the line output voltage for each half cycle of the carrier signals CA1 and CA2 in the three-level converter 6 is 1 ⁇ 2 of the change width of the two-level converter 8.
  • the three-level converter 6 two of the four semiconductor switching elements are turned on and off once in one carrier period, but the remaining two are not switched. Therefore, the average switching frequency per semiconductor switching element is 1 ⁇ 2 of the carrier frequency.
  • the switching frequency of the semiconductor switching element matches the carrier frequency.
  • the harmonic component included in the AC output voltage of the three-level converter 6 is equivalent to the harmonic component included in the AC output voltage of the two-level converter 8. 1/4 of the component.
  • the three-level converter 6 is adopted as the converter for converting the three-phase AC power from the three-phase AC power source 1 into the DC power. Circulating current that flows when the element is turned on can be suppressed. According to this, it is not necessary to turn off all the semiconductor switching elements of the converter during the power running operation of the load 4, and the circulating current can be suppressed. That is, the filter 5 and the three-level converter 6 can be used not only as a regeneration path but also as a power running path. Therefore, the power factor can be improved as compared with the conventional technique using the diode rectifier 2 as a power running path.
  • the inductance value of the reactor unit 52 included in the filter 5 can be reduced due to the feature of the three-level converter 6 that the high-frequency component is small. Thereby, the filter 5 can be reduced in size. Or when a harmonic component is smaller than the allowable level calculated
  • FIG. 3 is a circuit diagram showing a configuration of a power conversion apparatus 100 according to Embodiment 2 of the present invention. Referring to FIGS. 1 and 3, power converter 100 according to the second embodiment is obtained by replacing filter 5 in power converter 100 in FIG. 1 with filter 9.
  • the filter 9 includes reactors 90 and 91.
  • Reactor 90 is connected between three-level converter 6 and DC positive bus 13.
  • Reactor 90 is inserted in series with DC positive bus 13.
  • Reactor 92 is connected between three-level converter 6 and DC negative bus 14.
  • Reactor 92 is inserted in series with DC negative bus 14.
  • Reactors 90 and 92 are both inserted on the path through which the circulating current flows. Therefore, the function which suppresses a harmonic component is fulfill
  • a filter provided on the AC side of the three-level converter 6 is further provided on the DC side of the three-level converter 6, so that the number of reactors included in the filter can be reduced and a capacitor can be used. It can be unnecessary. This makes it possible to reduce the size of the filter.
  • reactors 90 and 92 need only be inserted on the path through which the circulating current flows, for example, as shown in FIG. 4, filter 9 is placed between diode rectifier 2 and DC positive bus 13 and DC negative bus 14. It is also possible to provide.
  • the reactor 90 is connected between the diode rectifier 2 and the DC positive bus 13. Reactor 90 is inserted in series with DC positive bus 13. Reactor 92 is connected between diode rectifier 2 and DC negative bus 14. Reactor 92 is inserted in series with DC negative bus 14.
  • the installation of the filter 9 shown in FIG. 3 and FIG. 4 and the effect (the downsizing of the filter) can be applied to the power converter 110 of FIG. 5 for confirmation. That is, in the power converter 110 of FIG. 5, the filter 9 is provided between the two-level converter 8 and the DC positive bus 13 and the DC negative bus 14 instead of the filter 5 on the AC side of the two-level converter 8. it can. And thereby, a filter can be reduced in size.
PCT/JP2017/000035 2017-01-04 2017-01-04 電力変換装置 WO2018127945A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020197011168A KR20190049878A (ko) 2017-01-04 2017-01-04 전력 변환 장치
PCT/JP2017/000035 WO2018127945A1 (ja) 2017-01-04 2017-01-04 電力変換装置
JP2018560275A JPWO2018127945A1 (ja) 2017-01-04 2017-01-04 電力変換装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/000035 WO2018127945A1 (ja) 2017-01-04 2017-01-04 電力変換装置

Publications (1)

Publication Number Publication Date
WO2018127945A1 true WO2018127945A1 (ja) 2018-07-12

Family

ID=62791155

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/000035 WO2018127945A1 (ja) 2017-01-04 2017-01-04 電力変換装置

Country Status (3)

Country Link
JP (1) JPWO2018127945A1 (ko)
KR (1) KR20190049878A (ko)
WO (1) WO2018127945A1 (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020114060A (ja) * 2019-01-09 2020-07-27 ファナック株式会社 電源装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019216592A1 (ko) 2018-05-11 2019-11-14 주식회사 엘지화학 고흡수성 수지 시트의 제조 방법

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06141552A (ja) * 1992-10-26 1994-05-20 Kasuga Denki Kk 高周波高圧電源の電力制御装置
JP2001054284A (ja) * 1999-06-03 2001-02-23 Mitsubishi Electric Corp コンバータ装置およびコンバータ・インバータシステム
JP2003309977A (ja) * 2002-04-15 2003-10-31 Toshiba Corp 電力変換装置
JP2005328624A (ja) * 2004-05-13 2005-11-24 Toshiba Corp 電力変換装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5762869B2 (ja) 2011-07-26 2015-08-12 住友重機械工業株式会社 射出成形機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06141552A (ja) * 1992-10-26 1994-05-20 Kasuga Denki Kk 高周波高圧電源の電力制御装置
JP2001054284A (ja) * 1999-06-03 2001-02-23 Mitsubishi Electric Corp コンバータ装置およびコンバータ・インバータシステム
JP2003309977A (ja) * 2002-04-15 2003-10-31 Toshiba Corp 電力変換装置
JP2005328624A (ja) * 2004-05-13 2005-11-24 Toshiba Corp 電力変換装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020114060A (ja) * 2019-01-09 2020-07-27 ファナック株式会社 電源装置

Also Published As

Publication number Publication date
KR20190049878A (ko) 2019-05-09
JPWO2018127945A1 (ja) 2019-06-27

Similar Documents

Publication Publication Date Title
US8611120B2 (en) Power conversion apparatus
KR100420698B1 (ko) 전력변환장치및전력변환방법
JP5282731B2 (ja) 電力変換装置
US9036379B2 (en) Power converter based on H-bridges
EP3389174A1 (en) Power conversion device
JP5494147B2 (ja) パワー半導体モジュール及びそれを用いた電力変換装置
WO2017056209A1 (ja) 無停電電源装置
JPH11220886A (ja) マルチレベル形電力変換器
JP2010288415A (ja) ３レベル電力変換装置
JP6146130B2 (ja) 電力変換装置のゲート駆動電源供給回路
WO2013114613A1 (ja) 電力変換装置
WO2018127945A1 (ja) 電力変換装置
US20200328693A1 (en) Converter circuit, power conversion system, and motor drive apparatus
JP7446932B2 (ja) 電力変換装置およびスイッチ装置
JPH08182342A (ja) 電力変換器
JP4178331B2 (ja) 直列多重パルス幅変調サイクロコンバータ装置およびその制御方法
JP3937236B2 (ja) 直列多重３相ｐｗｍサイクロコンバータ装置および直列多重３相ｐｗｍサイクロコンバータ装置の運転方法および直列多重３相ｐｗｍ電力変換装置
WO2022138608A1 (ja) 三相３レベルインバータの駆動制御装置および駆動制御方法
JP2012080627A (ja) 電力変換装置
JP4069460B2 (ja) 直列多重３相ｐｗｍサイクロコンバータ
JP2016127677A (ja) 電力変換装置
WO2023175116A1 (en) A voltage converter and method of converting voltage
JP6552388B2 (ja) 電流形電力変換装置の制御装置及び制御方法
JP2021175314A (ja) 多相インバータシステム
JP2011223763A (ja) 直流機制御用電力変換装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17889569

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2018560275

Country of ref document: JP

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 20197011168

Country of ref document: KR

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17889569

Country of ref document: EP

Kind code of ref document: A1