The plenary：The discussion in such as this text uses to the refrigeration compressor with the design , material of the single different step motor ，And to improve motor efficiency and reduce noise get relevant suggestions and measures out of. With the development of electric and electronic technology,frequency conversion technology is becoming riper.There are the frequency conversion compressors rapidly.Offer refrigeration in succession,raise the efficiency,reduce the noise,improve such advantages as operation dependability ,etc,in order to become a new a developing direction with refrigeration equipment.So in carry on research to frequency conversion technology use from compressor too in the article originally.
Keywords: Refrigeration; The electric capacity start， Single different step motor
