Performance Evaluation of Stator/Rotor-PM Flux-Switching Machines and Interior Rotor-PM Machine for Hybrid Electric Vehicles

A three-phase interior permanent magnet (IPM) machine with 18-stator-slots/12-rotor-poles and concentrated armature winding is commercially employed as a 10 kW integrated-starter-generator in commercial hybrid electric vehicle. For comprehensive fair evaluation, pair of flux-switching (FSPM) brushless machines, namely one stator (SPM-FS) machine, rotor (RPM-FS) are designed compared under the same DC-link voltage current density. Firstly, SPM-FS an IPM torque requirement, performance indicates that they exhibit similar density; however, former suffers from magnetic saturation low utilization magnets (PMs). Thus, to eliminate significant iron improve ratio per PM mass, RPM-machine overall volume where PMs moved multi-objective optimization algorithm applied optimization. Then, electromagnetic three considering end-effect, compared, including air-gap flux density, ripple, overload capacity flux-weakening ability. The predicted results indicate RPM-FS exhibits best promising candidate for vehicles. Experimental both machines provided validation.