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介绍了以集成移相触发器TCA785、单片机、数字电位器为核心所构成的晶闸管电源控制仪的工作原理，它集同步检测、移相脉冲形成、保护、手动控制与自动控制功能于一体，可用于对负载的恒电压或恒电流控制。
This paper introduces the working principle of thyristor power controller which integrates phase shift trigger TCA785, single chip microcomputer and digital potentiometer. It integrates functions of synchronous detection, phase shift pulse formation, protection, manual control and automatic control Constant voltage on the load or constant current control.