A STRATEGY FOR IMPROVING RELIABILITY OF FIELD-ORIENTED CONTROLLED INDUCTION-MOTOR DRIVES

Although design of induction motor drives employing field-oriented con trol has reached a relatively mature state, relatively little effort h as been expended on improving the reliability of these drives. In this paper a new, improved induction motor drive topology and control stra tegy is proposed that allows for continuous, disturbance free operatio n of the drive even with complete loss of one leg of the inverter or m otor phase. A complete analysis and computer simulation of this new co ntrol and circuit concept is included.