Title of Paper:Iron Loss and Efficiency Analysis of Interior PM Machines for Electric Vehicle Applications

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Affiliation of Author(s):自动化学院

Journal:IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS

Key Words:Flux-density waveform interior permanent magnet (IPM) machine iron loss PM eddy-current loss rotor topology

Abstract:An interior permanent magnet (IPM) machine with del + U shape rotor topology is proposed for electric vehicle applications whose iron loss and efficiency are compared to that of typical V shape and del shape machines. The air-gap flux density, flux-density waveform, and its harmonics on stator core and rotor core are analyzed. It can be obtained that del + U shape rotor topology has the lowest total harmonic distortion. The torque ripple, core loss, core loss density, PM eddy-current loss, d- and q-axis inductances, saliency ratio, characteristic current, and efficiency of three IPM machines are analyzed and compared. It is demonstrated that the efficiency of del + U shape IPM machine is higher than V shape and del shapemachines, particularly under high-speed operation, because the iron loss of the del + U shape machine is the lowest. With the increase of PM layer, the PM eddy-current loss is increased, PM segmentation can effectively reduce the PM eddy-current loss. Finally, the del + U shape IPM machine is prototyped to verify the results of the finite element analysis.

Note:卷: 65 期: 1 页: 114-124

ISSN No.:0278-0046

Translation or Not:no

Date of Publication:2018-01-01

Correspondence Author:Hu, Yaohua