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Design of new spoke type brushless DC motor for neodymium permanent magnet free

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5 Author(s)
Hyung-Wook Kim ; Dept. of Electrical Engineering, University of Ulsan, 102. Street Dae-hak, Nam-gu, 680-749, Korea ; Kyung-Tae Kim ; Byeong-Woo Kim ; Jin Hur
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This paper proposes a new design for a spoke-type brushless DC (BLDC) motor that does not require the use of a neodymium permanent magnet (Nd-PM). Recently, there has been a steep hike in the price of Nd-PM. In particular, the motor using in the vehicle is more seriously. Therefore, possible alternatives for Nd-PMs are being explored. In this study, we have proposed the replacement of Nd-PM with a ferrite Permanent Magnet (Fe-PM). The proposed model has an improved output characteristic because it uses the properties of the magnetic flux effect of the spoke-type motor. In addition, this model maximizes the magnetic flux density by using an assistant permanent magnet. The whole procedure system was optimized using a proposed calculation method for improving torque density. Also was verified by using the finite element method (FEM).

Published in:

2012 IEEE Vehicle Power and Propulsion Conference

Date of Conference:

9-12 Oct. 2012