WO2021135097A1 - Circuit de commande de rétroaction d'énergie de convertisseur de fréquence à quatre quadrants - Google Patents

Circuit de commande de rétroaction d'énergie de convertisseur de fréquence à quatre quadrants Download PDF

Info

Publication number
WO2021135097A1
WO2021135097A1 PCT/CN2020/098318 CN2020098318W WO2021135097A1 WO 2021135097 A1 WO2021135097 A1 WO 2021135097A1 CN 2020098318 W CN2020098318 W CN 2020098318W WO 2021135097 A1 WO2021135097 A1 WO 2021135097A1
Authority
WO
WIPO (PCT)
Prior art keywords
igbt
circuit
dri
signal
gate
Prior art date
Application number
PCT/CN2020/098318
Other languages
English (en)
Chinese (zh)
Inventor
郭少明
刘兴状
陈建行
侯彬彬
郑丹丹
Original Assignee
新风光电子科技股份有限公司
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 新风光电子科技股份有限公司 filed Critical 新风光电子科技股份有限公司
Publication of WO2021135097A1 publication Critical patent/WO2021135097A1/fr

Links

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
    • H02M7/219—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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/084—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters using a control circuit common to several phases of a multi-phase system
    • H02M1/0845—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters using a control circuit common to several phases of a multi-phase system digitally controlled (or with digital control)

Definitions

  • the invention relates to an energy feedback control circuit for a four-quadrant frequency converter, and more specifically, to an energy feedback control circuit for a four-quadrant frequency converter.
  • Four-quadrant inverters are more and more widely used.
  • the feature that is different from ordinary inverters is that the four-quadrant inverter can feed back the energy generated by the load motor when the load motor is braking or heavy objects to the power grid, so as to achieve energy saving.
  • Purpose The realization of this function is based on the IGBT module rectification used in the input of the inverter, which includes IGBT and parallel diodes, which can realize the bidirectional flow of energy, so as to meet the four-quadrant operation of the inverter.
  • the traditional drive signal acquisition method is to control the CPU to perform phase-locked loop processing on the three-phase input voltage signal to obtain the input voltage phase information, and then determine that it is greater than the set value based on the collected bus voltage
  • the drive signal of the rectifier IGBT is output to realize the energy feedback function; this method requires the CPU to perform data analysis and calculation, which causes the circuit and control method design to be complicated, which is not conducive to cost control; and the inverter bus is greater than a certain range of input voltage.
  • Feedback control which requires a larger input inductance, to suppress the high voltage difference between the input voltage and the inverter bus voltage, which causes a large feedback current, which is unfavorable for cost control and structural design.
  • the present invention provides a four-quadrant inverter energy feedback control circuit.
  • the four-quadrant inverter energy feedback control circuit of the present invention is characterized in that it includes a detection circuit, a logic processing circuit, a drive control circuit, and a drive circuit.
  • the detection circuit performs phase signals on the three-phase voltages UA, UB, and UC at the input of the inverter. Detect to obtain the phase relationship of the three-phase voltage; the logic processing circuit performs logical operations on the three-phase voltage phase signal output by the detection circuit to obtain the IGBT drive signal; the drive control circuit performs redundant error processing on the IGBT drive signal output by the logic processing circuit, and then Output to the drive circuit; the drive circuit controls the on-off state of the IGBT device in the frequency converter according to the received IGBT drive signal;
  • the frequency converter is composed of three rectifying bridge arms A, B and C.
  • the rectifying bridge arms A, B and C are all composed of 2 IGBT devices connected in series, and each IGBT device is connected in parallel with a rectifier diode; the IGBT drive output by the logic processing circuit After the signal is processed by the drive control circuit for redundant error and the output of the drive circuit, the turn-on sequence of each IGBT device is controlled to be consistent with the turn-on sequence of the rectifier diode connected in parallel with it, so that the energy flows between the load and the grid.
  • the detection circuit is composed of 6 isolated optocouplers IC1, IC2, IC3, IC4, IC5, and IC6.
  • the two ends of the input terminals of IC1 and IC2 are connected in series, IC3 and IC4.
  • the two ends of the input terminals of the series connection and the two ends of the input terminals of IC5 and IC6 are connected together.
  • the output terminals of IC1 and IC2 are connected in series
  • the output terminals of IC3 and IC4 are connected in series
  • the output terminals of IC5 and IC6 are connected in series.
  • connection point between the output terminals of IC1 and IC2 the connection point between the output terminals of IC3 and IC4, and the connection point between the output terminals of IC5 and IC6 respectively output three-phase voltage UA, UB and UC phase signals Ta, Tb, Tc.
  • the logic processing circuit includes a first delay circuit, a NOT gate and an AND gate.
  • the first delay circuit is an RC delay circuit composed of resistors and capacitors; three-phase voltage
  • the phase signals Ta, Tb, and Tc are delayed by the delay circuit to form signals Xa, Xb, and Xc respectively;
  • the signal Xa is operated by the NOT gate and then operated by the AND gate with Xb to form the control signal Dri_A1 for the upper bridge IGBT of the rectifier arm A.
  • the signal Xb is operated by the NOT gate and then operated by the AND gate with Xa to form the lower bridge of the rectifier arm A IGBT control signal Dri_A2;
  • the signal Xb is operated by the NOT gate and then operated by the AND gate with Xc to form the control signal Dri_B1 of the upper bridge IGBT of the rectifier arm B.
  • the signal Xc is operated by the NOT gate and then operated by the AND gate with Xb to form the lower bridge of the rectifier arm B IGBT control signal Dri_B2;
  • the signal Xc is operated by the NOT gate and then operated by the AND gate with Xa to form the control signal Dri_C1 of the upper bridge IGBT of the rectifier arm C.
  • the signal Xa is operated by the NOT gate and then operated by the AND gate with Xc to form the lower bridge of the rectifier arm B IGBT control signal Dri_C2.
  • the drive control circuit is composed of a second delay circuit and an AND gate.
  • the control signals Dri_A1, Dri_A2, Dri_B1, Dri_B2, Dri_C1, and Dri_C2 output by the logic processing circuit are all passed through the second delay circuit.
  • the AND operation is performed with itself through the AND gate to form the control signals Dri_A1_IGBT, Dri_A2_IGBT, Dri_B1_IGBT, Dri_B2_IGBT, Dri_C1_IGBT and Dri_C2_IGBT respectively.
  • the detection circuit collects three-phase input voltage signals to obtain the phase relationship of the three-phase voltage; the logic processing circuit logically synthesizes the three-phase input voltage phase signals, Obtain the drive signal of the input IGBT; the drive control circuit performs redundant error processing on the drive signal output by the logic processing circuit, and then outputs it to the drive circuit of the input IGBT; the present invention can obtain the drive signal of the feedback IGBT through a simple digital circuit;
  • the control system is simplified, no need to control the CPU for signal analysis and processing, and the cost of the control circuit is reduced; the control circuit of the present invention makes the turn-on timing of the feedback IGBT consistent with the turn-on timing of the rectifier diode, and does not need to detect the inverter bus voltage
  • the feedback IGBT and the rectifier diode work in real time, which can realize the two-way flow of energy, so there will be
  • Figure 1 is a schematic diagram of the four-quadrant inverter energy feedback control circuit of the present invention
  • FIG. 2 is a circuit diagram of the detection circuit in the present invention.
  • Figure 3 is a diagram of the corresponding relationship between the input voltage and the output phase signal of the detection circuit
  • FIG. 4 is a circuit diagram of the logic processing circuit in the present invention.
  • FIG. 5 is a circuit diagram of the drive control circuit of the present invention.
  • Figure 6 is a diagram of the driving signal processing effect.
  • 1 detection circuit 1 detection circuit, 2 logic processing circuit, 3 drive control circuit, 4 drive circuit.
  • the principle diagram of the energy feedback control circuit of the four-quadrant inverter of the present invention is given, which is composed of a detection circuit 1, a logic processing circuit 2, a drive control circuit 3, and a drive circuit 4.
  • the three-phase power at the input end of the inverter is UA, UB and UC respectively.
  • the inverter is composed of three rectifier arms A, B and C.
  • the rectifier arms A, B and C are all composed of two IGBT devices connected in series.
  • the IGBT devices are connected in parallel with rectifier diodes.
  • the control terminals of the IGBTs of the upper and lower bridges of rectifier arm A are VG1 and VG2, respectively.
  • the control terminals of the IGBTs of the upper and lower bridges of rectifier arm B are VG3 and VG4, respectively.
  • the control terminals of the IGBTs of the upper bridge and the lower bridge of the arm C are VG5 and VG6, respectively.
  • the detection circuit 1 detects the phase signals of the three-phase voltages UA, UB and UC at the input of the inverter to obtain the phase relationship of the three-phase voltage; the logic processing 2 circuit performs logical operations on the three-phase voltage phase signals output by the detection circuit to obtain the IGBT Drive signal; the drive control circuit 3 performs redundant error processing on the IGBT drive signal output by the logic processing circuit 2 and then outputs it to the drive circuit 4; the drive circuit controls the on-off state of the IGBT device in the frequency converter according to the received IGBT drive signal.
  • the turn-on sequence of each IGBT device is controlled to be consistent with the turn-on sequence of the rectifier diode connected in parallel to it. The energy flow between the load and the grid.
  • the detection circuit 1 shown is composed of 6 isolated optocouplers IC1, IC2, IC3, IC4, IC5, and IC6. After the input terminals of IC1 and IC2 are connected in series The two ends of the IC3 and IC4 input terminals are connected in series, and the IC5 and IC6 input terminals are connected in series. After the output terminals of IC1 and IC2 are connected in series, the output terminals of IC3 and IC4 are connected in series, and the output terminals of IC3 and IC4 are connected in series.
  • the two ends connected in series with the output terminal of IC6 are respectively connected to the positive and negative poles of the DC power supply; the connection point between the output terminals of IC1 and IC2, the connection point between the output terminals of IC3 and IC4, and the connection point between the output terminals of IC5 and IC6 respectively output three-phase voltage UA , UB and UC phase signals Ta, Tb, Tc.
  • FIG 4 is the circuit diagram of the logic processing circuit in the present invention. It can be seen that the phase A of the inverter rectifier arm corresponding to the input voltage UA is shown.
  • the turn-on time of the upper bridge IGBT-VG1 and the diode is 30° ⁇ 150°; it can be obtained from the phase signal of the three-phase input voltage, delay the A-phase voltage signal Ta by 30° to obtain the signal Xa, and the B-phase voltage signal Tb is delayed by 30° to obtain signal Xb, and then the signal Xa is inverted and signal Xb is ANDed, which is the turn-on time Dri_A1 of the bridge arm A-phase upper bridge IGBT-VG1 and the diode; the power frequency grid frequency is 50Hz, and the delay is 30° It can be expressed as a delay of 1.667ms.
  • the turn-on time of the inverter rectifier arm A phase, the lower bridge IGBT-VG2 and its diode is 210° ⁇ 330°; it can be obtained from the phase signal of the three-phase input voltage, delay the A phase voltage signal TA by 30° to obtain the signal Xa , The B-phase voltage signal Tb is delayed by 30° to obtain the signal Xb, and then the signal Xb is inverted and the signal Xa is ANDed, which is the turn-on time Dri_A2 of the bridge arm A-phase lower bridge IGBT-VG2 and its diode.
  • Dri_A2 the drive signal of each rectifier IGBT input by the inverter can be obtained, and the signal relationship is expressed as follows:
  • Dri_A1 ! Xa&Xb
  • Dri_A2 Xa&! Xb;
  • Dri_B1 ! Xb&Xc
  • Dri_B2 Xb&! Xc
  • Dri_C1 ! Xc&Xa
  • Dri_C2 Xc&Xa
  • Dri_A1 is the frequency conversion input rectifier arm A-phase upper bridge IGBT drive signal
  • Dri_A2 is the frequency conversion input rectifier arm A-phase lower bridge IGBT drive signal
  • Dri_B1 is the frequency conversion input rectifier arm B-phase upper bridge IGBT drive signal
  • Dri_B2 is the frequency conversion input rectifier arm B-phase lower bridge IGBT drive signal
  • Dri_C1 is the frequency conversion input rectifier arm C-phase upper bridge IGBT drive signal
  • Dri_C2 is the frequency conversion input rectifier arm C-phase lower bridge IGBT drive signal.
  • the input voltage signal is filtered by resistors and capacitors to achieve the purpose of delaying 1.667ms; but in practical applications, due to the first delay circuit (resistors R1, capacitors C1, R3, C3 in Figure 4, And the error of R4, C4) will cause the input voltage phase signal TA to delay the signal Xa obtained by 1.667ms, and there is a certain timing error in theory. This error will cause the IGBT turn-on timing error and cause a short circuit failure.
  • the error of the resistance and capacitance is taken into account, and the signal delay time is stipulated.
  • the delay time is less than 1.667ms, which can ensure that all signal delays are less than 30°;
  • the minimum delay time T1 of the circuit is calculated; at this time, the drive signals Dri_A1, Dri_A2, Dri_B1, Dri_B2, Dri_C1, and Dri_C2 output from the logic processing circuit are all earlier than the theoretical turn-on sequence; therefore, the drive control circuit is required 3 to correct the drive signal timing.
  • a circuit diagram of the drive control circuit in the present invention is given, which is composed of a second delay circuit and an AND gate.
  • the second delay circuit is composed of a capacitor C2 of a resistor R2.
  • the drive control circuit combines the logic processing circuit
  • the output driving signal continues to be ANDed with the signal after the delay of the second delay circuit, which can eliminate the problem of the signal timing advance; that is, the control signals Dri_A1, Dri_A2, Dri_B1, Dri_B2, Dri_C1, and Dri_C2 are all passed through
  • the AND operation is performed with itself via the AND gate to form control signals Dri_A1_IGBT, Dri_A2_IGBT, Dri_B1_IGBT, Dri_B2_IGBT, Dri_C1_IGBT and Dri_C2_IGBT respectively.
  • the signal delay time in the drive control circuit is specified when the maximum negative error of the resistance and capacitance meets the requirement that the delay time is greater than T1, which can ensure that the final drive signal is within the theoretical requirement range.
  • the driving signal processing effect diagram is given.
  • the driving signal output by the logic processing circuit is delayed by the second delay circuit and continues to be ANDed with the signal to eliminate the problem of early turn-on timing. , To avoid the occurrence of short-circuit faults.
  • the circuit of the present invention works in real time in the feedback control function of the frequency converter.
  • the input voltage is greater than the internal voltage of the frequency converter, the energy flows from the grid to the frequency converter; when the input voltage is less than the internal voltage of the frequency converter, the energy flows from the frequency converter to the grid; the present invention
  • the circuit does not need to detect the height of the inverter busbar, and does not need to control the CPU data calculation and analysis to realize the energy feedback function of the four-quadrant inverter; and under the control of this circuit, the feedback circuit works in real time, and the grid voltage and the internal voltage of the inverter will not A large pressure difference is generated, that is, the inverter input adopts a small current-limiting inductance, which can achieve a good suppression of the feedback current.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Ac-Ac Conversion (AREA)

Abstract

La présente invention concerne un circuit de commande de rétroaction d'énergie de convertisseur de fréquence à quatre quadrants comprenant un circuit de détection, un circuit de traitement logique, un circuit de commande d'attaque et un circuit d'attaque, le circuit de détection détectant un signal de phase d'une tension triphasée ; le circuit de traitement logique appliquant une opération logique au signal de phase de la tension triphasée pour obtenir un signal d'attaque d'IGBT ; et le circuit de commande d'attaque appliquant un traitement de redondance au signal d'attaque d'IGBT délivré par le circuit de traitement logique, et commandant une séquence de temps de conduction de chaque dispositif IGBT pour qu'elle soit cohérente avec une séquence de temps de conduction d'une diode de redresseur connectée en parallèle au dispositif IGBT, de façon à obtenir le flux d'énergie entre une charge et un réseau électrique. Le circuit de commande de rétroaction d'énergie de convertisseur de fréquence à quatre quadrants permet d'obtenir un signal d'attaque d'IGBT au moyen d'un circuit numérique simple ; et de simplifier un système de commande, de ne plus avoir besoin de commander une CPU afin d'analyser et de traiter un signal, de réduire le coût du circuit de commande, d'obtenir le flux bidirectionnel d'énergie, et de réduire davantage le coût d'un système convertisseur de fréquence.
PCT/CN2020/098318 2019-12-31 2020-06-26 Circuit de commande de rétroaction d'énergie de convertisseur de fréquence à quatre quadrants WO2021135097A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911414351.6A CN110932578B (zh) 2019-12-31 2019-12-31 四象限变频器能量回馈控制电路
CN201911414351.6 2019-12-31

Publications (1)

Publication Number Publication Date
WO2021135097A1 true WO2021135097A1 (fr) 2021-07-08

Family

ID=69854570

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/098318 WO2021135097A1 (fr) 2019-12-31 2020-06-26 Circuit de commande de rétroaction d'énergie de convertisseur de fréquence à quatre quadrants

Country Status (2)

Country Link
CN (1) CN110932578B (fr)
WO (1) WO2021135097A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116298561A (zh) * 2023-02-10 2023-06-23 常熟天地煤机装备有限公司 用于四象限变频器的电压相序检测系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110932578B (zh) * 2019-12-31 2023-01-10 新风光电子科技股份有限公司 四象限变频器能量回馈控制电路
CN111969871B (zh) * 2020-07-27 2024-08-02 深圳市汇川技术股份有限公司 整流控制方法、系统、设备及计算机可读存储介质

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101895214A (zh) * 2009-05-20 2010-11-24 深圳市英威腾电气股份有限公司 一种三相同步整流电路及其控制方法
JP2014079086A (ja) * 2012-10-10 2014-05-01 Fuji Electric Co Ltd 電圧駆動型半導体素子の駆動回路
CN104079281A (zh) * 2013-03-26 2014-10-01 富士通半导体股份有限公司 开关电路和半导体存储装置
CN106602881A (zh) * 2017-01-25 2017-04-26 杭州士兰微电子股份有限公司 同步整流控制电路、功率变换器及其控制方法
CN207164135U (zh) * 2017-09-27 2018-03-30 河南中州电气设备有限公司 高压液态综合软性启动功率检测装置
CN110932578A (zh) * 2019-12-31 2020-03-27 新风光电子科技股份有限公司 四象限变频器能量回馈控制电路

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06150570A (ja) * 1992-10-30 1994-05-31 Toshiba Corp 再生装置
CN201247956Y (zh) * 2008-07-04 2009-05-27 江西省电力科学研究院 电能质量调节器死区处理逻辑装置
CN104362864A (zh) * 2014-09-26 2015-02-18 山东新风光电子科技发展有限公司 基于光电耦合器检测电压相位的回馈方法和装置
CN110504828B (zh) * 2018-05-17 2020-09-22 台达电子工业股份有限公司 控制电路及控制方法
CN109412425B (zh) * 2018-11-07 2020-12-15 北京星航机电装备有限公司 一种带抑制直压波动的三电平-四象限变频器及控制方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101895214A (zh) * 2009-05-20 2010-11-24 深圳市英威腾电气股份有限公司 一种三相同步整流电路及其控制方法
JP2014079086A (ja) * 2012-10-10 2014-05-01 Fuji Electric Co Ltd 電圧駆動型半導体素子の駆動回路
CN104079281A (zh) * 2013-03-26 2014-10-01 富士通半导体股份有限公司 开关电路和半导体存储装置
CN106602881A (zh) * 2017-01-25 2017-04-26 杭州士兰微电子股份有限公司 同步整流控制电路、功率变换器及其控制方法
CN207164135U (zh) * 2017-09-27 2018-03-30 河南中州电气设备有限公司 高压液态综合软性启动功率检测装置
CN110932578A (zh) * 2019-12-31 2020-03-27 新风光电子科技股份有限公司 四象限变频器能量回馈控制电路

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116298561A (zh) * 2023-02-10 2023-06-23 常熟天地煤机装备有限公司 用于四象限变频器的电压相序检测系统
CN116298561B (zh) * 2023-02-10 2024-01-09 常熟天地煤机装备有限公司 用于四象限变频器的电压相序检测系统

Also Published As

Publication number Publication date
CN110932578A (zh) 2020-03-27
CN110932578B (zh) 2023-01-10

Similar Documents

Publication Publication Date Title
WO2021135097A1 (fr) Circuit de commande de rétroaction d'énergie de convertisseur de fréquence à quatre quadrants
CN204597799U (zh) 基于60°坐标系的三相vienna整流器
AU2020102520A4 (en) A soft starter of asynchronous motor and its control method
CN111431394B (zh) 一种降压式单相三电平无桥pfc变换器系统的控制方法
CN105897005B (zh) 一种具有容错功能的双级式矩阵变换器及其容错控制方法
CN103066865B (zh) 三相无桥功率因数校正交流-直流变换器
CN107026496B (zh) 一种基于自抗扰技术的电动汽车双向充放电装置及方法
CN103986347B (zh) 一种具有保护功能的三相桥式半控整流触发电路
CN203747688U (zh) 一种三电平并网逆变器
CN105099249A (zh) 高可靠性双输入逆变器
CN202424280U (zh) 直流充电机
CN110943640B (zh) 一种t型逆变器fc桥臂冗余结构电力转换器拓扑结构
EP4214824A1 (fr) Dispositif de conversion de puissance électrique cc-ca tolérant aux défaillances
CN203151389U (zh) 一种三相高功率因数整流器的控制电路
CN202889185U (zh) 交流伺服驱动器母线电压的软启动装置
CN109873487B (zh) 一种用于三相三电平vienna整流器的主从备份方法
CN216699846U (zh) 一种主动换相的混合式换流器拓扑结构
CN203326915U (zh) 用于减少并网逆变器冲击电流的控制系统
CN111384870A (zh) 一种三电平整流器的控制装置与控制方法
CN111431420B (zh) 一种三相四线制三电平Buck PFC整流器系统的控制方法
CN211959080U (zh) 一种降压式三相四线制三电平pfc整流器系统
CN104660243A (zh) 一种小幅值交流信号到直流信号的转换方法及装置
CN110280870B (zh) 一种全数字逆变焊机采样和控制系统
CN105846471A (zh) 脉宽调制反馈控制电网
CN205160396U (zh) 一种高效率双Boost无桥PFC变换器

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: 20910053

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20910053

Country of ref document: EP

Kind code of ref document: A1