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可控硅又称晶闸管,是一种能控制强电的半导体功率器件,能在高电压、大电流条件下工作。常用的有单向可控硅和双向可控硅两种。此外,还有光控可控硅、快速可控硅、逆导可控硅及可关断可控硅等。由于可控硅具有体积小、重量轻、效率高、寿命长、使用方便等突出优点,目前已广泛用于可控整流、直流斩波、逆变、交流调压和交流无触点开关电路中。单向可控硅必须在阳极与控制极同时加正向电压
Thyristor, also known as thyristor, is a kind of semiconductor power device that can control strong electric power and can work under high voltage and high current condition. Commonly used one-way SCR and bidirectional SCR two. In addition, there are light-controlled silicon controlled, fast SCR, reverse SCR and SCR can be turned off. Due to its advantages of small size, light weight, high efficiency, long life and convenient operation, SCR has been widely used in controllable rectifier, DC chopper, inverter, AC voltage regulator and AC non-contact switch circuit . Unidirectional thyristor must be in the anode and the control pole at the same time plus the forward voltage