A Novel Multiphase Fault Tolerant Permanent Magnet Motor Drive for Fuel cell Powered Vehicles

This paper presents a novel five-phase fault tolerant interior permanent magnet motor drive with higher performance and reliability for use in fuel cell powered vehicles. A new machine design along with efficient control strategy is developed for fault tolerant operation of electric drive without severely comprising the drive performance. Fault tolerance is achieved by employing a five phase fractional-slot concentrated windings configuration IPM motor drive, with each phase electrically, magnetically, thermally and physically independent of all others. The proposed electric drive system poses with higher torque density, negligible cogging torque, and about plusmn0.5% torque ripple. Power converter requirement are discussed and control strategies to minimize the impact of a machine or converter fault are developed. Beside, all the requirement of a fault tolerant operation, including high phase inductance and negligible mutual coupling between phases are met. Analytical and finite element analysis and comparison case studies are presented.