说明：  可控硅调功率驱动程序,采用检测过零信号(50HZ,即20ms一个周期)来触发可控硅,例如:过零信号后马上触发,那么输出100 ,过零信号后延时5ms,那么输出50 .
(Thyristor power driver using zero-crossing detection signal (50HZ, ie 20ms cycle) to trigger the SCR, for example: immediately after the zero-crossing signal is triggered, then the output 100 zero-crossing signal delay after 5ms, then output 50 .)