The research of SPWM frequency converter 3-phase cage inductionmotor's variable current servo-system

摘要

In this paper, the weak harmonic voltage of SPWM frequencyconverter 3-phase cage induction motor variable-speed system which issingle pole modulation model at carrier wave ratio N=9 and modulationdegree M=0.99 employed to form completely new 3-phase cage inductionmotor variable current servo-system by way of amplitude control. It isour hope that the motor could be developed into existence soon and sothat further tests on such system could be performed