Low-Noise and High-Power Spoke-Type Magnet-Assisted Flat-Plate IPMSM for Integrated Starter Generator Motor

This study proposes a low-noise high-power motor for integrated starter generators (ISGs) and a stress reduction technique for a flat-plate interior permanent magnet synchronous motor (IPMSM) rotor structure, and applies a spoke-type permanent magnet-assisted structure that improves the generating power without increasing noise and vibration (NV). Our proposed spoke-type magnet-assisted flat-plate IPMSM technique with 10% current increasement improves the generating power by 26.5% and achieves 24.3 kW, suppressing increases in the NV level. In this study, we demonstrate a novel stress reduction concept and a low NV concept for a spoke-type permanent magnet-assisted flat-plate IPMSM. Measured results of the proposed motor show good agreement with the simulation results and demonstrate NV levels equivalent to a conventional motor.