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Permanent magnet (PM) motor is the best choice in the application to a hybrid vehicle. PM configuration is one of the critical design points for the application. This paper presents the effect of PM shapes on the motor performance, especially sinusoidal induced voltage. The proposed design by finite element method has been confirmed by comparing emf wave form, harmonics, reluctance torque, and rated torque between conventional and models. Quantitative comparison of the characteristics for interior permanent magnet synchronous motor of four models is shown. The four models are lateral magnet, V-shape magnet, modified V-shape magnet, and C-shape magnet.
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Lee et al. (2005) studied this question.
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