Applying automatic control principle to analyze dynamic operating modes of in - Phase Electromotor Transistor Excitation System, we have brought out relevant characters.

应用自动控制原理对同步电动机晶闸管励磁系统进行扰动后的动态分析，提出了相应的性能指标。

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The phase- locked loop is one kind of control system which is able to achieve phase automatic lock, to compose frequency and to trace demodulation system.

锁相环路是一种能实现相位自动锁定的控制系统，主要用于频率合成及跟踪解调系统。

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SVC(TND)SERIES single phase high precision full automatic ac voltage regulator composable of contact auto voltage regulator, servo motor automatic control circuit etc.

系列单相高精度全自动交流稳压器，由接触式自耦调压伺服式电动机、自动控制电路等组成。

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