Fault-tolerant control strategy of 9-phase induction motorwith one phase open
LI Yong1,ZHENG Qi2,ZHENG Yu3
(1.Jinhua Electric Power Corporation,Jinhua 321000，China;2.Ningbo Electric Power Corporation,
Ningbo 315200， China;3. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)
Abstract:  Multiphase induction motor is more reliable than three phase induction motor， because it has more than three phases in the stator.As a result,the loss of one or more phases did not prevent the machine starting and working.Aiming at those features ,two faulttolerant motor control strategies were analyzed incorporating a multiphase motor that allowed for continuous,disturbancefree operation of the drive even with complete loss of one (or more) legs of the inverter or motor phase. A complete finite element analysis of a nine phase induction motor utilizing those controls was included. The simulation results illustrate the validity and the efficiency of the proposed method.
Key words:  nine phase induction motor;one phase open;disturbancefree operation ; faulttolerant control strategy