PERMANENT MAGNET SWITCHED FLUX MOTOR TORQUE CAPABILITY: A RELIABLE SOLUTION TO FUELESS VEHICLE APPLICATION

Abstract

Electric motor powered by stored electricity for electric vehicles propulsion is a reliable component now that manufacturing of combustion engine remains complicated and fossil oil it uses is expensive and getting depleted, and will be out of stock. This paper presents and analyses a three-phase permanent magnet segmented outer rotor switched flux brushless A.C motor in terms of  electromagnetic performances which includes phase flux linkage, cogging torque, induced EMF waveforms, torque-current characteristics and electromagnetic torque for high applications. The proposed outer rotor motor consists of 24/10 stator-rotor segments and embracing four set of armature windings in each phase with alternate magnet in radial direction. The performance is predicted by 2-D FEA using JMAG Software version 14. Compared with conventional synchronous permanent magnet synchronous motor and hybrid excitation switched flux motor, the proposed motor exhibited high peak magnetic flux linkage, low cogging torque and higher average torque capable of sustaining acceleration for long distance travels. However, it is likely to saturate as the current is increased due to higher armature current, thus will require high magnetic loading for torque capability higher than the conventional machines.