A New Fault-Tolerant Permanent-Magnet Machine for Electric Vehicle Applications

作者：Chen, Qian; Liu, Guohai^*; Gong, Wensheng; Zhao, Wenxiang

来源：IEEE Transactions on Magnetics, 2011, 47(10): 4183-4186.

DOI：10.1109/TMAG.2011.2146238

• Electric vehicles (EVs)
• fault tolerant
• finite-element method (FEM)
• permanent-magnet (PM) machine

This paper proposes a new fault-tolerant permanent-magnet (PM) brushless machine for four-wheel independently driven electric vehicles (EVs). The key of the proposed machine is to make tooth widths unequal of inner stator, hence, offering more trapezoidal back-EMF waveform. Due to the fact that the radial PMs are embedded in the outer rotor, the proposed machine incorporates the merits of high torque-to-weight ratio, mechanical robustness, and high air-gap flux density. In addition, multiphase and single-layer fractional slot concentrated windings are employed to improve the reliability. The electromagnetic characteristics of the proposed machine are analyzed by using the time-stepping finite-element method (FEM) and field-circuit cosimulation method, such as magnetic field distribution, flux destiny, flux linkage, and torque, verifying the effectiveness of the theoretical analysis.

• 出版日期2011-10
• 单位江苏大学