对单相交流电的电压进行调节的电路。用在电热控制、交流电动机速度控制、灯光控制和交流稳压器等场合。对单相交流电的电压进行调节的电路。用在电热控制、交流电动机速度控制、灯光控制和交流稳压器等场合。-Single-phase alternating current voltage to adjust the circuit. Used in electric control, AC motor speed control, lighting control and AC voltage regulator and other occasions. A circuit for adjusting the voltage of a single-phase alternating current. Used in electric control, AC motor speed control, lighting control and AC voltage regulator and other occasions.