The TDGC2 and TSGC2 regulator have many advantages: such as no wave form distortion, Small in size, Light in weight, high efficiency, easy-to-run, reliable and able to operate for a long time, It can be widely used in industries such as chemical metallurgial instrumental, machenical and electrical and light industry, as well as for scientific experiments, public utility and domestic electrical appliances in order to adjust voltage, speed or light, to control temperature and power, it is a kind of ideal adjustable AC power source.