Optimization of rotor shape for constant torque improvement and radial magnetic force minimization

The design of notch and barrier was optimized in order to improve the characteristics of constant torque while minimizing the cogging torque that occurs as a result of teeth and slot structure. The barrier was installed in order to minimize the cogging torque and torque ripple by finite element meth...

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Bibliographic Details
Published in:Journal of Central South University 2012-02, Vol.19 (2), p.357-364
Main Authors: Cho, Gyu-won, Woo, Seok-hyun, Ji, Seung-hun, Park, Kyoung-won, Jang, Ki-bong, Kim, Gyu-tak
Format: Article
Language:English
Subjects:
Engineering
Metallic Materials
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Summary:The design of notch and barrier was optimized in order to improve the characteristics of constant torque while minimizing the cogging torque that occurs as a result of teeth and slot structure. The barrier was installed in order to minimize the cogging torque and torque ripple by finite element method (FEM) with a reduced barrier width toward the center of magnetic pole. The position and width of notch, which can offset cogging torque, can be calculated with energy distribution of air-gap using Fourier series. The optimized model demonstrates a 60% decrease in the cogging torque, a 75.3% decrease in the torque ripple and a 3% increase in the operating torque when compared with the basic model.
ISSN:2095-2899
2227-5223
DOI:10.1007/s11771-012-1012-7