Inner Permanent Magnet Synchronous Machine Optimization for HEV Traction Drive Application in Order to Achieve Maximum Torque per Ampere

Recently, inner permanent magnet (ipm) synchronous machines have been introduced as possible traction motor in hybrid electric vehicle (hev) and traction applications due to their unique merits. in this machines, in order to achieve maximum torque per ampere (mtpa) by minimum volume of motor, optimization of the motor geometry parameters is necessary. this paper presents a novel structure of ipm synchronous machines for traction applications with fragmental buried rotor magnets in order to achieve low torque ripple, iron losses and cogging torque, furthermore, an iteration method for ipm synchronous machine design is presented to achieve minimum volume, mtpa and low amplitude of cogging torque for this structure. thus, simulation of this motor is done in order to extract the output values using 3d-finite element method. this method has high accuracy and gives us a better insight of motor performance and presents back emf, power factor, cogging torque, flux density, torque per ampere diagram, cpsr (constant power speed ratio), torque per speed diagram of this ipm synchronous machine. this study can help designers in design approach of such motors.