Electromagnetic Performance Analysis of Modular Segmented Permanent Magnet Consequent Pole Flux Switching Machine Employing Flux Gap

Abstract

Permanent Magnet (PM) Flux Switching machines (PMFSMs) are durable applicants for high speed brushless application due to high torque and power density. However, despite of excessive PM usage and leakage flux, conventional PMFSMs are not excellent fault tolerant. To overcome the abovesaid shortcomings, this paper introduces Modular Segmented Permanent Magnet Consequent Pole Flux Switching Machine (MSPMCPFSM) which reduces PM volume by 46.54% utilizing segmented PM configuration and added fault tolerant capability by introducing flux gap in stator. Moreover, influence of the Flux Gap (FG) is investigated on electromagnetic performance. Analysis concludes that FG offers physical partitioned between phases to limit fault propagation during fault condition between each phase. In additional, with the increase in FG, phase self-inductance increases that mitigates short circuit current at higher speed whereas mutual inductance is suppressed to avoid mutual coupling of faulty and healthy phases. Finally, developed MSPMCPFSM is compared with conventional PMFSMs topologies. Analysis concluded that at reduced PM, MSPCPFSM exhibits 2.6 times higher torque density, and 3.81 times more power density with excellent fault tolerant capability.