Steady State Performance and Dynamic Stability of C.S.I. Fed Permanent Magnet Motor

Abstract

The paper presents a digital computer simulation of steady state performance and a root locus study of dynamic stability of P.M. synchronous motor with induced voltage sensing type control when supplied from a machine commutated current source inverter. A single mathematical model based on subtransient equations in the d-q reference frame (E” model) has been adopted for dynamic stability and steady state analysis. The influence of various machine and converter parameters on dynamic stability has been brought out. Dynamic stability is materially affected by motor-converter parameters and steady state operating point. The steady state performance of the P.M. motor departs considerably from that of a C.S.I. driven synchronous motor.