WO2021135097A1 - Four-quadrant frequency converter energy feedback control circuit - Google Patents

Four-quadrant frequency converter energy feedback control circuit Download PDF

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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
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Prior art keywords
igbt
circuit
dri
signal
gate
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PCT/CN2020/098318
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French (fr)
Chinese (zh)
Inventor
郭少明
刘兴状
陈建行
侯彬彬
郑丹丹
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新风光电子科技股份有限公司
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Publication of WO2021135097A1 publication Critical patent/WO2021135097A1/en

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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
    • 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.

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  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Ac-Ac Conversion (AREA)

Abstract

A four-quadrant frequency converter energy feedback control circuit in the present invention comprises a detection circuit, a logic processing circuit, a drive control circuit and a drive circuit, wherein the detection circuit detects a phase signal of a three-phase voltage; the logic processing circuit performs a logic operation on the phase signal of the three-phase voltage to obtain an IGBT drive signal; and the drive control circuit performs redundancy processing on the IGBT drive signal output by the logic processing circuit, and controls a conduction time sequence of each IGBT device to be consistent with a conduction time sequence of a rectifier diode connected to the IGBT device in parallel, so as to realize the flow of energy between a load and a power grid. According to the four-quadrant frequency converter energy feedback control circuit, an IGBT drive signal can be obtained by means of a simple digital circuit; and a control system is simplified, a CPU does not need to be controlled in order to analyze and process a signal any more, the cost of the control circuit is reduced, the bidirectional flow of energy can be realized, and the cost of a frequency converter system is further reduced.

Description

四象限变频器能量回馈控制电路Four-quadrant inverter energy feedback control circuit 技术领域Technical field
本发明涉及一种四象限变频器能量回馈控制电路，更具体的说，尤其涉及一种的四象限变频器能量回馈控制电路。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.
背景技术Background technique
四象限变频器应用越来越广泛，其区别于普通变频器的特征在于，四象限变频器能够将负载电机在制动，或重物下放时产生的能量，回馈到电网中，从而达到节能的目的；该功能的实现是基于变频器输入采用的IGBT模块整流，其包括IGBT和并联的二极管，能够实现能量的双向流动，从而满足变频器的四象限运行。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.
对于变频器输入整流IGBT模块，传统的驱动信号获得方式，是由控制CPU对三相输入电压信号进行锁相环处理，得出输入电压相位信息，再根据采集的母线电压，判断其大于设定值时，输出整流IGBT的驱动信号，实现能量回馈功能；该方式需要CPU进行数据分析计算，造成电路和控制方式设计的复杂，不利于成本控制；且变频器母线大于输入电压一定范围时才执行回馈控制，这就需要较大的输入电感，来抑制输入电压与变频器母线电压压差过高，引起的回馈大电流，这对成本控制和结构设计是不利的。For the inverter input rectifier IGBT module, 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 When the value is set, 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.
技术问题technical problem
本发明为了克服上述技术问题的缺点，提供了一种四象限变频器能量回馈控制电路。In order to overcome the shortcomings of the above technical problems, the present invention provides a four-quadrant inverter energy feedback control circuit.
技术解决方案Technical solutions
本发明的四象限变频器能量回馈控制电路，其特征在于：包括检测电路、逻辑处理电路、驱动控制电路和驱动电路，检测电路对变频器输入端的三相电压UA、UB和UC的相位信号进行检测，得到三相电压的相位关系；逻辑处理电路对检测电路输出的三相电压相位信号进行逻辑运算，得到IGBT驱动信号；驱动控制电路对逻辑处理电路输出的IGBT驱动信号进行冗错处理，然后输出到驱动电路；驱动电路根据接收的IGBT驱动信号对变频器中IGBT器件的通断状态进行控制；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;
变频器由三个整流桥臂A、B和C组成，整流桥臂A、B和C均由2个串联的IGBT器件组成，每个IGBT器件均并联有整流二极管；逻辑处理电路输出的IGBT驱动信号经驱动控制电路的冗错处理、驱动电路的输出后，控制每个IGBT器件的导通时序和与其并联的整流二极管的导通时序一致，以负载与电网之间的能量流动。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.
本发明的四象限变频器能量回馈控制电路，所述检测电路由6个隔离光耦IC1、IC2、IC3、IC4、IC5、IC6组成，IC1与IC2的输入端串联后的两端、IC3与IC4的输入端串联后的两端以及IC5与IC6的输入端串联后的两端连接在一起，IC1与IC2的输出端串联后、IC3与IC4的输出端串联后、IC5与IC6的输出端串联后的两端分别接于直流电源的正负极上；IC1与IC2输出端的连接点、IC3与IC4输出端的连接点、IC5与IC6输出端的连接点分别输出三相电压UA、UB和UC的相位信号Ta、Tb、Tc。In the four-quadrant inverter energy feedback control circuit of the present invention, 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. 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 IC5 and IC6 are connected in series. The two ends of the 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.
本发明的四象限变频器能量回馈控制电路，所述逻辑处理电路包括第一延时电路、非门和与门，第一延时电路为由电阻和电容构成的RC延时电路；三相电压的相位信号Ta、Tb、Tc经延时电路的延迟后分别形成信号Xa、Xb、Xc；In the four-quadrant inverter energy feedback control circuit of the present invention, 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;
信号Xa经非门运算后再与Xb经与门运算，形成整流桥臂A上桥IGBT的控制信号Dri­_A1，信号Xb经非门运算后再与Xa经与门运算，形成整流桥臂A下桥IGBT的控制信号Dri­_A2；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;
信号Xb经非门运算后再与Xc经与门运算，形成整流桥臂B上桥IGBT的控制信号Dri­_B1，信号Xc经非门运算后再与Xb经与门运算，形成整流桥臂B下桥IGBT的控制信号Dri­_B2；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;
信号Xc经非门运算后再与Xa经与门运算，形成整流桥臂C上桥IGBT的控制信号Dri­_C1，信号Xa经非门运算后再与Xc经与门运算，形成整流桥臂B下桥IGBT的控制信号Dri­_C2。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.
本发明的四象限变频器能量回馈控制电路，所述驱动控制电路由第二延时电路和与门组成，逻辑处理电路输出的控制信号Dri­_A1、Dri­_A2、Dri­_B1、Dri­_B2、Dri­_C1和Dri­_C2均经第二延时电路的延时后再与其自身经与门进行与运算，分别形成控制信号Dri­_A1_IGBT、Dri­_A2_IGBT、Dri­_B1_IGBT、Dri­_B2_IGBT、Dri­_C1_IGBT和Dri­_C2_IGBT。In the four-quadrant inverter energy feedback control circuit of the present invention, 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. After the delay of the 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.
有益效果Beneficial effect
本发明的有益效果是：本发明的四象限变频器能量回馈控制电路，检测电路采集三相输入电压信号，得到三相电压的相位关系；逻辑处理电路将三相输入电压相位信号进行逻辑综合，得到输入IGBT的驱动信号；驱动控制电路将逻辑处理电路输出的驱动信号，进行冗错处理，然后输出到输入IGBT的驱动电路；本发明通过简单的数字电路，即可得到回馈IGBT的驱动信号；简化了控制系统，不再需要控制CPU进行信号的分析处理，降低控制电路成本；本发明的控制电路，使得回馈IGBT的导通时序和整流二极管的导通时序一致，不需要检测变频器母线电压的高低来控制回馈能量的大小，回馈IGBT与整流二极管实时工作，能够实现能量的双向流动，因此不会产生输入电压和变频器母线较大的压差，进而降低了回馈电流的冲击，使得变频器输入使用很小的限流电抗，即可很好的抑制回馈电流，进一步降低了变频器系统的成本。The beneficial effects of the present invention are: in the four-quadrant inverter energy feedback control circuit of the present invention, 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 To control the magnitude of the feedback energy, the feedback IGBT and the rectifier diode work in real time, which can realize the two-way flow of energy, so there will be no large voltage difference between the input voltage and the inverter bus, thereby reducing the impact of the feedback current and making the frequency conversion The input of the inverter uses a small current-limiting reactance, which can well suppress the feedback current and further reduce the cost of the inverter system.
附图说明Description of the drawings
图1为本发明的四象限变频器能量回馈控制电路的原理图；Figure 1 is a schematic diagram of the four-quadrant inverter energy feedback control circuit of the present invention;
图2为本发明中检测电路的电路图；Figure 2 is a circuit diagram of the detection circuit in the present invention;
图3为输入电压与检测电路输出相位信号的对应关系图；Figure 3 is a diagram of the corresponding relationship between the input voltage and the output phase signal of the detection circuit;
图4为本发明中逻辑处理电路的电路图；Figure 4 is a circuit diagram of the logic processing circuit in the present invention;
图5为本发明中驱动控制电路的电路图；Figure 5 is a circuit diagram of the drive control circuit of the present invention;
图6为驱动信号处理效果图。Figure 6 is a diagram of the driving signal processing effect.
图中：1检测电路，2逻辑处理电路，3驱动控制电路，4驱动电路。In the figure: 1 detection circuit, 2 logic processing circuit, 3 drive control circuit, 4 drive circuit.
本发明的最佳实施方式The best mode of the present invention
下面结合附图与实施例对本发明作进一步说明。The present invention will be further described below in conjunction with the drawings and embodiments.
如图1所示，给出了本发明的四象限变频器能量回馈控制电路的原理图，其由检测电路1、逻辑处理电路2、驱动控制电路3和驱动电路4组成，所示的四象限变频器输入端的三相电分别为UA、UB和UC，变频器由三个整流桥臂A、B和C组成，整流桥臂A、B和C均由2个串联的IGBT器件组成，每个IGBT器件均并联有整流二极管，整流桥臂A上桥和下桥的IGBT的控制端分别为VG1和VG2，整流桥臂B上桥和下桥的IGBT的控制端分别为VG3和VG4，整流桥臂C上桥和下桥的IGBT的控制端分别为VG5和VG6。As shown in Figure 1, 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.
检测电路1对变频器输入端的三相电压UA、UB和UC的相位信号进行检测，得到三相电压的相位关系；逻辑处理2电路对检测电路输出的三相电压相位信号进行逻辑运算，得到IGBT驱动信号；驱动控制电路3对逻辑处理电路2输出的IGBT驱动信号进行冗错处理，然后输出到驱动电路4；驱动电路根据接收的IGBT驱动信号对变频器中IGBT器件的通断状态进行控制。逻辑处理电路2输出的IGBT驱动信号经驱动控制电路（3）的冗错处理、驱动电路4的输出后，控制每个IGBT器件的导通时序和与其并联的整流二极管的导通时序一致，以负载与电网之间的能量流动。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. After the IGBT drive signal output by the logic processing circuit 2 is subjected to the redundant error processing of the drive control circuit (3) and the output of the drive circuit 4, 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.
如图2所示，给出了本发明中检测电路的电路图，所示的检测电路1由6个隔离光耦IC1、IC2、IC3、IC4、IC5、IC6组成，IC1与IC2的输入端串联后的两端、IC3与IC4的输入端串联后的两端以及IC5与IC6的输入端串联后的两端连接在一起，IC1与IC2的输出端串联后、IC3与IC4的输出端串联后、IC5与IC6的输出端串联后的两端分别接于直流电源的正负极上；IC1与IC2输出端的连接点、IC3与IC4输出端的连接点、IC5与IC6输出端的连接点分别输出三相电压UA、UB和UC的相位信号Ta、Tb、Tc。As shown in Figure 2, the circuit diagram of the detection circuit in the present invention is given. 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.
如图3所示，给出了输入电压与检测电路输出相位信号的对应关系图，图4给出了本发明中逻辑处理电路的电路图，可见对于输入电压UA对应的变频器整流桥臂A相，其上桥IGBT-VG1与二极管的开通时刻为30°~150°；由三相输入电压的相位信号可以得出，将A相电压信号Ta延时30°得到信号Xa，将B相电压信号Tb延时30°得到信号Xb，然后将信号Xa取反与信号Xb相与，即为桥臂A相上桥IGBT-VG1与二极管的开通时刻Dri_A1；工频电网频率为50Hz，延时30°即可表示为延时1.667ms。As shown in Figure 3, the corresponding relationship between the input voltage and the output phase signal of the detection circuit is given. Figure 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.
变频器整流桥臂A相，下桥IGBT-VG2与其二极管的开通时刻为210°~330°；由三相输入电压的相位信号可以得出，将A相电压信号TA延时30°得到信号Xa，将B相电压信号Tb延时30°得到信号Xb，然后将信号Xb取反与信号Xa相与，即为桥臂A相下桥IGBT-VG2与其二极管的开通时刻Dri_A2。同理，可求得变频器输入各路整流IGBT的驱动信号，其信号关系表示如下：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. In the same way, 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_A1=! Xa&Xb;
Dri_A2=  Xa&！Xb；Dri_A2= Xa&! Xb;
Dri_B1=！Xb&  Xc；Dri_B1=! Xb&Xc;
Dri_B2=  Xb&！Xc；Dri_B2= Xb&! Xc;
Dri_C1=！Xc&  Xa；Dri_C1=! Xc&Xa;
Dri_C2=  Xc&  Xa；Dri_C2= Xc&Xa;
“！”表示非运算，“&”表示与运算。"!" means not operation, "&" means AND operation.
其中，Dri_A1为变频输入整流桥臂A相上桥IGBT驱动信号；Among them, Dri_A1 is the frequency conversion input rectifier arm A-phase upper bridge IGBT drive signal;
Dri_A2为变频输入整流桥臂A相下桥IGBT驱动信号；Dri_A2 is the frequency conversion input rectifier arm A-phase lower bridge IGBT drive signal;
Dri_B1为变频输入整流桥臂B相上桥IGBT驱动信号；Dri_B1 is the frequency conversion input rectifier arm B-phase upper bridge IGBT drive signal;
Dri_B2为变频输入整流桥臂B相下桥IGBT驱动信号；Dri_B2 is the frequency conversion input rectifier arm B-phase lower bridge IGBT drive signal;
Dri_C1为变频输入整流桥臂C相上桥IGBT驱动信号；Dri_C1 is the frequency conversion input rectifier arm C-phase upper bridge IGBT drive signal;
Dri_C2为变频输入整流桥臂C相下桥IGBT驱动信号。Dri_C2 is the frequency conversion input rectifier arm C-phase lower bridge IGBT drive signal.
在逻辑处理电路中，输入电压信号经过电阻电容滤波，以达到延时1.667ms的目的；但在实际应用中，由于第一延时电路（图4中的电阻R1、电容C1，R3、C3，以及R4、C4）的误差，将会导致输入电压相位信号TA延时1.667ms得到的信号Xa，与理论上存在一定的时序误差，该误差将导致IGBT开通时序出错，造成短路故障。In the logic processing circuit, 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.
为解决上述问题，将电阻电容的误差考虑在内，其信号延时时间规定，在电阻电容最大负误差范围时，延时时间小于1.667ms，即可保证所有的信号延时都小于30°；同时计算出该电路的最小延时时间T1；而此时逻辑处理电路中所输出的驱动信号Dri_A1、Dri_A2、Dri_B1、Dri_B2、Dri_C1、Dri_C2都比理论导通时序提前；因此，需要通过驱动控制电路3来校正驱动信号时序。In order to solve the above problem, the error of the resistance and capacitance is taken into account, and the signal delay time is stipulated. When the maximum negative error range of the resistance and capacitance, the delay time is less than 1.667ms, which can ensure that all signal delays are less than 30°; At the same time, 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.
如图5所示，给出了本发明中驱动控制电路的电路图，其由第二延时电路和与门组成，第二延时电路由电阻R2的电容C2组成，驱动控制电路将逻辑处理电路输出的驱动信号，经过第二延时电路的延时后继续与该信号进行相与，即可消除该信号时序上超前的问题；即控制信号Dri­_A1、Dri­_A2、Dri­_B1、Dri­_B2、Dri­_C1和Dri­_C2均经第二延时电路的延时后再与其自身经与门进行与运算，分别形成控制信号Dri­_A1_IGBT、Dri­_A2_IGBT、Dri­_B1_IGBT、Dri­_B2_IGBT、Dri­_C1_IGBT和Dri­_C2_IGBT。驱动控制电路中的信号延时时间，规定在电阻电容最大负误差时，满足延时时间大于T1的要求，即可保证最终得到的驱动信号，在理论的要求范围内。如图6所示，给出了驱动信号处理效果图，将逻辑处理电路输出的驱动信号经第二延时电路的延时后继续与该信号进行相与，即可消除导通时序提前的问题，避免短路故障的出现。As shown in Figure 5, 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 After the delay of the second delay circuit, 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. As shown in Figure 6, 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.
本发明电路，在变频器回馈控制功能中实时工作，在输入电压大于变频器内电压时，能量由电网流向变频器；在输入电压小于变频器内电压时，能量由变频器流向电网；本发明电路，不需要检测变频器母线高低，不需要控制CPU数据计算分析，即可实现四象限变频器的能量回馈功能；且该电路控制下，回馈电路实时工作，电网电压与变频器内电压不会产生较大的压差，即变频器输入采用较小的限流电感，即可达到对回馈电流很好的抑制作用。The circuit of the present invention works in real time in the feedback control function of the frequency converter. When 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.

Claims (4)

  1. 一种四象限变频器能量回馈控制电路，其特征在于：包括检测电路（1）、逻辑处理电路（2）、驱动控制电路（3）和驱动电路（4），检测电路对变频器输入端的三相电压UA、UB和UC的相位信号进行检测，得到三相电压的相位关系；逻辑处理电路对检测电路输出的三相电压相位信号进行逻辑运算，得到IGBT驱动信号；驱动控制电路（3）对逻辑处理电路输出的IGBT驱动信号进行冗错处理，然后输出到驱动电路（4）；驱动电路根据接收的IGBT驱动信号对变频器中IGBT器件的通断状态进行控制；A four-quadrant inverter energy feedback control circuit, which is characterized in that it includes a detection circuit (1), a logic processing circuit (2), a drive control circuit (3), and a drive circuit (4). The phase signals of the phase voltages UA, UB and UC are detected 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 (3) The IGBT drive signal output by the logic processing circuit is subjected to redundant error processing, and then output to the drive circuit (4); the drive circuit controls the on-off state of the IGBT device in the inverter according to the received IGBT drive signal;
    变频器由三个整流桥臂A、B和C组成，整流桥臂A、B和C均由2个串联的IGBT器件组成，每个IGBT器件均并联有整流二极管；逻辑处理电路（2）输出的IGBT驱动信号经驱动控制电路（3）的冗错处理、驱动电路（4）的输出后，控制每个IGBT器件的导通时序和与其并联的整流二极管的导通时序一致，以负载与电网之间的能量流动。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 output of the logic processing circuit (2) After the IGBT drive signal is processed by the drive control circuit (3) and the output of the drive circuit (4), 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 the load and the power grid. The energy flows between.
  2. 根据权利要求1所述的四象限变频器能量回馈控制电路，其特征在于：所述检测电路（1）由6个隔离光耦IC1、IC2、IC3、IC4、IC5、IC6组成，IC1与IC2的输入端串联后的两端、IC3与IC4的输入端串联后的两端以及IC5与IC6的输入端串联后的两端连接在一起，IC1与IC2的输出端串联后、IC3与IC4的输出端串联后、IC5与IC6的输出端串联后的两端分别接于直流电源的正负极上；IC1与IC2输出端的连接点、IC3与IC4输出端的连接点、IC5与IC6输出端的连接点分别输出三相电压UA、UB和UC的相位信号Ta、Tb、Tc。The four-quadrant inverter energy feedback control circuit according to claim 1, characterized in that: the detection circuit (1) is composed of 6 isolated optocouplers IC1, IC2, IC3, IC4, IC5, IC6, IC1 and IC2 The two ends of the input terminals are connected in series, the two ends of the input terminals of IC3 and IC4 are connected in series, and the two ends of the input terminals of IC5 and IC6 are connected in series. The output terminals of IC1 and IC2 are connected in series, and the output terminals of IC3 and IC4 are connected in series. After the series connection, the two ends of the output terminals of IC5 and IC6 in series are connected to the positive and negative poles of the DC power supply respectively; the connection point of the output terminals of IC1 and IC2, the connection point of the output terminals of IC3 and IC4, and the connection point of the output terminals of IC5 and IC6 are output respectively Phase signals Ta, Tb, Tc of three-phase voltages UA, UB and UC.
  3. 根据权利要求2所述的四象限变频器能量回馈控制电路，其特征在于：所述逻辑处理电路（2）包括第一延时电路、非门和与门，第一延时电路为由电阻和电容构成的RC延时电路；三相电压的相位信号Ta、Tb、Tc经延时电路的延迟后分别形成信号Xa、Xb、Xc；The four-quadrant inverter energy feedback control circuit according to claim 2, characterized in that: the logic processing circuit (2) includes a first delay circuit, a NOT gate and an AND gate, and the first delay circuit is composed of resistors and RC delay circuit composed of capacitors; three-phase voltage phase signals Ta, Tb, Tc are delayed by the delay circuit to form signals Xa, Xb, Xc;
    信号Xa经非门运算后再与Xb经与门运算，形成整流桥臂A上桥IGBT的控制信号Dri­_A1，信号Xb经非门运算后再与Xa经与门运算，形成整流桥臂A下桥IGBT的控制信号Dri­_A2；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;
    信号Xb经非门运算后再与Xc经与门运算，形成整流桥臂B上桥IGBT的控制信号Dri­_B1，信号Xc经非门运算后再与Xb经与门运算，形成整流桥臂B下桥IGBT的控制信号Dri­_B2；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;
    信号Xc经非门运算后再与Xa经与门运算，形成整流桥臂C上桥IGBT的控制信号Dri­_C1，信号Xa经非门运算后再与Xc经与门运算，形成整流桥臂B下桥IGBT的控制信号Dri­_C2。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.
  4. 根据权利要求3所述的四象限变频器能量回馈控制电路，其特征在于：所述驱动控制电路（3）由第二延时电路和与门组成，逻辑处理电路（2）输出的控制信号Dri­_A1、Dri­_A2、Dri­_B1、Dri­_B2、Dri­_C1和Dri­_C2均经第二延时电路的延时后再与其自身经与门进行与运算，分别形成控制信号Dri­_A1_IGBT、Dri­_A2_IGBT、Dri­_B1_IGBT、Dri­_B2_IGBT、Dri­_C1_IGBT和Dri­_C2_IGBT。The four-quadrant inverter energy feedback control circuit according to claim 3, characterized in that: the drive control circuit (3) is composed of a second delay circuit and an AND gate, and the control signal Dri_A1 output by the logic processing circuit (2) , Dri_A2, Dri_B1, Dri_B2, Dri_C1, and Dri_C2 are all delayed by the second delay circuit, and then AND with themselves through 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.
PCT/CN2020/098318 2019-12-31 2020-06-26 Four-quadrant frequency converter energy feedback control circuit WO2021135097A1 (en)

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