适用于:风机、泵类负载要求调速运行的场合。Applications:Specificallyengineeredforuseonpumps,fansandsuchinstrumenttoobtainsuitablematchingofoutputpowerandspeed.特点:有级调速,电机功率与风机、泵类负载合理匹配,使系统效率提高,是风机、泵类的专用电机。Features:havestepchangesofrotationalspeedtomeettherequirementsofloadcharacter.Simplifyspeed-changingsystems.变极方案:2/4、4/6、4/8、6/8、4/6/8Pole-changingmode:doubleorthreespeed