Design and optimization of segmented PM consequent pole hybrid excited flux switching machine for EV/HEV application

Abstract

Hybrid Excited Flux Switching Machines (HEFSMs) unique feature of high torque density (T den ) of Permanent Magnet (PM) machines and flux regulation capability of wound field excitation machines. Due to aforesaid unique features, stator active HEFSMs are preferred for EV/HEV applications. In this paper a new Segmented PM Consequent Pole HE-FSM (sPMCPHEFSM) with flux bridge is proposed for EV/HEV. The developed SPMCPHEFSM exhibits improved flux modulation and flux regulation capability at reduced PM usage (suppressed PM volume by 46.52% and PM cost by 46.48%) and eliminating stator leakage flux. First, SPMCPHEFSM is geometric optimized (GO) for investigating influence of leading design with key performance indicators such as flux linkage (Φ pp ), average torque (T avg ), cogging torque (T cog ), T den , average power (P avg ) and power density (P den ) and then proceeded optimized model to structure modification for optimal stator design and position of field excitation coils (FEC). Comprehensive performance analysis reveals that the developed SPMCPHEFSM show improved Φ pp maximum up to 9.11%, improved T avg maximum up to 23.63%, truncate T cog up to 18.9% whereas T den and P den are boost up to 23.55% and 89.72% respectively.