Multiphase induction motors for a variable speed drive

The purpose of the present paper is selection of the most suitable multiphase induction motor for a variable speed drive. One can use induction motor with phase number more than three in a variable speed drive. The modern level of electronics development allows us to design the motor control system for the multiphase induction motor. Phase number increasing allows to influence the amplitude and frequency of the pulses in the inverter that has a good effect on electromagnetic compatibility of the drive and the source under limited power of the latter. By phase number increasing we can get higher reliability of the power drive part because the induction motor is principally capable for work in case of failure in one phase (or even in some phases) as under such conditions the rotating magnetic field persists to be produced in an induction motor