Comparison and study of 6/5- and 12/10-pole permanent magnet flux-switching motors considering flux-weakening capability

Two permanent magnet flux-switching motors (PMFSM), viz. the one with 6 poles on stator and 5 poles on rotor, denoted as 6/5-pole motor, and the one with 12 poles on stator and 10 poles on rotor, denoted as 12/10-pole motor, are investigated in this paper. Main parameters, such as flux-linkage, back-EMF, flux density, cogging torque and d-axis inductance are comparatively studied with finite element analysis (FEA), while flux-weakening capability is considered as a key feature. It is shown that both motors have essentially sinusoidal open-circuit flux-linkage and back-EMF waveforms, and strong airgap field to produce high torque. With the same rated current, speed and winding turns, the 6/5-pole motor has a lower cogging torque, better flux-weakening capability and better PMs usage while the 12/10-pole motor only has a slightly higher back-EMF.

[1]  Yoji Takeda,et al.  Current phase control methods for permanent magnet synchronous motors , 1990 .

[2]  S. E. Rauch,et al.  Design Principles of Flux-Switch Alternators [includes discussion] , 1955, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[3]  Z.Q. Zhu,et al.  Design of Flux-Switching Permanent Magnet Machine Considering the Limitation of Inverter and Flux-Weakening Capability , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.

[4]  J.X. Shen,et al.  Novel Permanent Magnet Switching Flux Motors , 2006, Proceedings of the 41st International Universities Power Engineering Conference.

[5]  Mohamed Gabsi,et al.  Design and comparison of different flux‐switch synchronous machines for an aircraft oil breather application , 2005 .

[6]  Hamid Ben Ahmed,et al.  Switching flux permanent magnet polyphased synchronous machines , 1997 .