Variable-pole Multi-speed Three-phase Asynchronous Motor 
YD series variable pole multi-speed three-phase asynchronous motors are the main products series deriving from three-phase asynchronous motors.The motor can change output speed according to the load condition and to achieve reasonabel matching of the motor power and simply adjustable speed system. They are widely used in many area, such as machine tools, mining metallurgy, spinning and weaving, printing and dyeing, chemical industry and agriculture machinery, etc.