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Design and analysis of new fault-tolerant permanent magnet motors for four-wheel-driving electric vehicles

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6 Author(s)
Guohai Liu ; School of Electrical and Information Engineering, Jiangsu University, Zhenjiang, China ; Wensheng Gong ; Qian Chen ; Linni Jian
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In this paper, a novel in-wheel permanent-magnet (PM) motor for four-wheel-driving electrical vehicles is proposed. It adopts an outer-rotor topology, which can help generate a large drive torque, in order to achieve prominent dynamic performance of the vehicle. Moreover, by adopting single-layer concentrated-windings, fault-tolerant teeth, and the optimal combination of slot and pole numbers, the proposed motor inherently offers negligible electromagnetic coupling between different phase windings, hence, it possesses a fault-tolerant characteristic. Meanwhile, the phase back electromotive force waveforms can be designed to be sinusoidal by employing PMs with a trapezoidal shape, eccentric armature teeth, and unequal tooth widths. The electromagnetic performance is comprehensively investigated and the optimal design is conducted by using the finite-element method.

Published in:

Journal of Applied Physics  (Volume:111 ,  Issue: 7 )