Ningran Song - Institute of Automation , Qilu University of Technology(Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Automotive Electronics Technology
Mengmei Zhu - Institute of Automation， Qilu University of Technology(Shandong Academy of Sciences)， Shandong Provincial Key Laboratory of Automotive Electronics Technology
Guangxu Zhou - Institute of Automation， Qilu University of Technology(Shandong Academy of Sciences)， Shandong Provincial Key Laboratory of Automotive Electronics Technology
Lei Guo - Institute of Automation， Qilu University of Technology(Shandong Academy of Sciences)， Shandong Provincial Key Laboratory of Automotive Electronics Technology
Yongyun Mu - Institute of Automation， Qilu University of Technology(Shandong Academy of Sciences)， Shandong Provincial Key Laboratory of Automotive Electronics Technology
Jia Gao - Institute of Automation， Qilu University of Technology(Shandong Academy of Sciences)， Shandong Provincial Key Laboratory of Automotive Electronics Technology
Jianhui Ma - Institute of Automation， Qilu University of Technology(Shandong Academy of Sciences)， Shandong Provincial Key Laboratory of Automotive Electronics Technology
Ke Zhang - Rongcheng Rongjia Power Co., LTD

A novel Halbach permanent magnet array with rectangle section and trapezoid section is proposed and optimized in this paper. The analytical model of the premanent magnet segment is established based on the surface current method, which is numerically efficient and can be utilized to evaluate the magnetic field closely with the premanent magnet segment’s configurations. The analytical model of the Halbach array is acquired based on the superposition principle and coordinate transformation. The fundamental component of the magnetic flux density and the sinusoidal distortion rate are chosen as the optimization object. And the optimization is executed on the Halbach array with one specific set of dimensions by the genetic algorithm in global scale. The effectiveness of the optimization is validated by the finite element analysis. Compared to the traditional Halbach array with rectangle section, the magnetic field created by the optimized proposed Halbach array in this paper owns better performance.

Magnetic, Halbach, surface current method, Genetic Algorithm