Abstract
This paper focuses on investigating the influence of design parameters on characteristics of external rotor permanent magnet synchronous machine (PMSM). Under the constraint of torque density, the effects of pole number and teeth height ratio on copper and iron losses are studied, as well as motor efficiency and winding temperature rise. Finally, to meet the need of the new micro-EV C11CB by Beijing Automotive Industry Corporation (BAIC), two optimal PMSMs are built the simulation models. One is optimized for maximum motor efficiency, and the other is designed for minimum winding temperature rise. The characteristics of two optimal PMSMs are analyzed by the finite element analysis (FEA), and compared with analytical results.
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