High Performance Flux Switching Machine using Segmented Rotor and PM Technology for In-Wheel Motorcycle and Scooter Applications

In this paper, a high torque flux switching motor using permanent magnet excitation flux and employing segmented rotor for in-wheel application is presented. The paper explains the choice of segmented rotor rather than conventional salient rotor pole. Flux switching machine (FSM) is an advance form of synchronous machine whose electrical frequency doubles the conventional synchronous machine, thus is suitable for speed application. A feasible combination of 24/10 stator-rotor configuration was designed using JMAG Designer tool solver version 14. The motor embraced radial permanent magnet pattern placed on stator tip alternately in opposite direction. Armature winding is alternately wound which segmented rotor permits using permanent magnet excitation flux for high flux linkage. Performance of proposed motor was compared with conventional permanent magnet synchronous motor whose torque and power output are 110Nm and 6000W whose construction lacked proper mechanical assembly to operate at high temperature condition, thus liable to low performance and breakdown. General analysis of the proposed segmented outer rotor in terms of flux linkage, cogging torque, induced emf and achieved high average torque of 212Nm with secured mechanical assembly higher than permanent magnet synchronous machine. Therefore, assessment of proposed motor is reliable for high torque suitable for electric motorcycle and scooter applications.