To suppress the disturbance of an output current.SOLUTION: A power conversion device includes: a power converter 4 which applies a voltage to the three-phase winding of an AC rotary machine 1, using a DC voltage from a DC power supply 2; and a control unit 6 which calculates a voltage command to the three-phase winding based on a control command, calculates the application voltage based on the voltage command, and compares the application voltage with a carrier signal to output an ON/OFF signal to the switching element of the power converter 4. The control unit 6 switches between a first carrier signal C1 and a second carrier signal C2 having a 180-degree phase difference from the first carrier signal C1 and uses the switched signal. Here, the control unit 6 performs the switchover of the carrier signal to a switchover target phase using, as the switchover target phase, a switching halt phase in which the application voltage is coincident with either the maximum value or the minimum value of the carrier signal.SELECTED DRAWING: Figure 1
【課題】出力電流の乱れを抑制する。【解決手段】電力変換装置は、直流電源2からの直流電圧を用いて交流回転機1の3相巻線に対して電圧を印加する電力変換器4と、制御指令に基づいて3相巻線に対する電圧指令を演算し、電圧指令に基づいて印加電圧を演算し、印加電圧と搬送波信号とを比較することにより電力変換器4のスイッチング素子に対するオン/オフ信号を出力する制御部6とを備え、制御部6は、第1搬送波信号C1と、第1搬送波信号C1に対して180deg位相が異なる第2搬送波信号C2とを切り替えて使用し、制御部6は、印加電圧が搬送波信号の最大値と一致する、または、印加電圧が搬送波信号の最小値と一致するスイッチング停止相を切替対象相として、切替対象相に対して搬送波信号の切り替えを行う。【選択図】図1
POWER CONVERSION DEVICE, DYNAMOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE
電力変換装置、発電電動機の制御装置、および、電動パワーステアリング装置
2020-08-31
Patent
Electronic Resource
Japanese
IPC: | 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 , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B62D MOTOR VEHICLES , Motorfahrzeuge |
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