SupplyWe provide :Series YPTZ,YPTQ 3-phase ac frequency-control variable-speedasynchronous motors are the latest generation products successfullydeveloped by LEC,which bases on ten years experience of manufactur-ing HL-voltage electric machine,and takes advantage of domestic &foreign advanced technology,and combines them with the developmentof current intermational power,electronics technology and control tech-nique.According to the different frequency converter,we can design thefrequency-control variable-speed motors,which are able to fit withconverter of vector control type,direct torque control type,VVVF andVF type using GTO,IGBT or IGCT electronic elements ete,and candireetly withstand dv/dt surge voltage caused by curent change-overof power clements of the frequency converter,and resist the effect ofshaft voltage caused by the hi-frequency harmonic we on thebearing of motor,and it can be operated in the different conditionssuch as the constant torque,constant power and pumps load.
This series of products are excllent in design,high in energeticproperties,exellent in reliability,low in vibration and noise,steady inoperation,convenient in installation and maintenance,which he beenpopular with user after putting into market since 1995.This series offrequency-control variable-speed motors are of insulation class F.Thebasic series of motor can be designed according to diferent voltage suchas 380V 600V,400V,690V and 850V.The mounting dimensions andoutput are in conformity with standards IEC72 and IEC34.
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