It's significant to study the regulation of active power of three-phase synchronous generator by way of the alternating power source of three-phase industrial frequency.
三相同步发电机作为三相工业频率的交流电源，研究其有功功率调节具有重要意义。
AC fault security power source system is to provide alternating current for unit safety shutdown when power cut happens for a long time due to power grid failure or other reasons.
交流事故保安电源系统是当电网发生事故或其他原因致使火电厂厂用电长时间停电时，提供机组安全停机所必需的交流用电系统。
Power supply or circuit capable of regulating either alternating or direct current within 5% of desired value, and limiting the open circuit (source) voltage to 20 millivolts maximum.
电源及能调节交流或直流电流在期望值的5%之内的，控制开路电压到最大20毫伏的路。
The DC/AC conversion section converts a direct current inputted from a direct current power source into an alternating current, and outputs the alternating current.
该DC /AC转换部分直接转换为电流输入由直流电源成交流电，并输出交流电。
The varible polarity output process of the inverter AC arc welding power source we designed is a very quickly alternating dynamic one.
本文就采用脉冲稳弧的交流弧焊机的电路原理、焊接性能进行了分析和探讨。
The varible polarity output process of the inverter AC arc welding power source we designed is a very quickly alternating dynamic one.
本文就采用脉冲稳弧的交流弧焊机的电路原理、焊接性能进行了分析和探讨。
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