A Dual-Harmonic Pole-Changing Motor with Split Permanent Magnet Pole

This paper proposes a dual-harmonic pole-changing (PC) motor with split permanent magnet (PM) poles (DHPCM-SPMPs). By adopting PM pole structure, the amplitude of third flux density is increased greatly. Therefore, when PC winding adopted to couple fundamental and components, respectively, proposed can work as satisfy operating demands electric tractors. The design effect structure introduced first. topology then designed according slot vector diagrams two operation be realized by switches. Aiming at torque ratio objective, parameters determined based on mathematical derivation, speed-widening capability proved characteristic analysis. Finally, electromagnetic performance DHPCM-SPMPs investigated compared finite element analysis, which shows high in eight-pole mode wide speed range twenty-four-pole benefiting from operation.