voltagedropn.压降voltagen.电压voltage static stability电压静态稳定voltage-amplifier tube[电] 电压放大管voltage oriented control电压定向控制voltage pulsating factor电压脉动因数voltage grading resistor分压电阻器voltage feedback circuit电压反馈电路voltage space vector PWM电压空间矢量脉宽调制技术voltage feedback control电压反馈控制voltage modulating drive调压管驱动voltage selecting switch电压选择开关