The automatic compensation electricity regulator, also known as "high-power regulator with load, high efficiency, by compensating for transformer voltage regulation. The basic structure of the automatic compensation power voltage regulator: motor driven carbon brushes slide between the windings of the autotransformer directly adjust the output voltage to regulate the output voltage or by compensating for transformer. Advantages: with load capacity, high efficiency, waveform distortion small, power anti-jamming capability. Disadvantages: slow response time (≥ 1S), mechanical wear, requiring regular maintenance, AC contactor and motor in the regulator process generates large noise. Application: industry, agriculture, transport Shun of post and telecommunications, military, railway, scientific research, culture and other fields of large mechanical and electrical equipment, metal processing equipment, production lines, construction equipment, elevators, medical equipment, embroidery, textile equipment, air conditioning, radio and television and home electricity, lighting and other needs regulated places. Regulator (http://www.pandeng.org.cn)