Consideration of Asymmetrical Magnetic Pole IPMSM Using Bonded Rare-earth Magnet

This paper presents an asymmetric magnetic pole structure interior permanent magnet synchronous motor (IPMSM) with a simplified magnet shape that uses bonded rare-earth magnets. By adopting the asymmetrical magnet arrangement, the current phase angle, where the magnetic torque is maximized, can be set to almost the same phase while maximizing the reluctance torque. It was shown that the proposed motor can achieve larger torque compared with conventional IPMSMs that use sintered neodymium magnets.