YZPEJ 2 series inverter duty three-phase asynchronous motor are suitable for running in frequency change and speed regulation system which the power is supplied by a frequency converter. This new series of product designed unitedly in the country can be mated with all kinds of SPWM frequency changer and speed regulation devices and is equipped with a separate cooling fan which ensure the motor for good cooling at various speed. They can be used in machine tool, metallugic industry, textile, printing and dyeing, transportation, chemical industry, mine and for seep regulation of fans and pumps.