原电压 meaning in English

primary voltage

This voltage must be in phase with the primary voltage
这一电压必须与原电压相同。
By deeply analyzing the reason of the fault and optimizing the parameter of circuit , performance of drivers increased greatly and a new way based on compound driving had been proposed which reduce the fault of traditional driver
通过电路分析,研制了电压、电流及复合控制型压电陶瓷驱动器。并通过优化电路参数,在其他性能指标不降的情况下提高了原电压及电流型驱动器的动态性能。