Segment design of the complementary magnetic-geared dual-rotor motor for hybrid electric vehicles

Abstract

Magnetic-geared dual-rotor motor (MGDRM) has been considered as a promising candidate of the power split device in the hybrid electric vehicles. Essentially, the MGDRM is a pure electrical component without the brush, slip ring and mechanical gears, so its reliability and lifetime can perform well. However, the design principle of the MGDRM has not been fully transferred to a practical technology. The asymmetrical back-EMF of this motor is an issue, which is a sake of the torque ripple produced by the MGDRM. The complementary structure has been proposed to improve the back-EMF, but some detailed problems of this solution have not been addressed. This paper gives the analysis and discussion on the segment design of the complementary MGDRM. Two prototype machines are also fabricated for the experimental validation of the research results.