Halbach永磁阵列磁场解析求解及推力建模

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Abstract For ironless moving-permanent-magnet long-stroke linear motor,the mover length of Halbach array is less than the length of the stator coil along the direction of movement. In order to simplify the current commutation and improve the utilization of the magnetic field,the range of energized coils is greater than the permanent magnet array magnetic field range. Then,the number of coils energized at the same time is not changed,so it needs to take advantage of the ends of the magnetic field of permanent magnet arrays. Due to the distortion of the end magnetic field generating,thrust fluctuation generated by the end-effect will affect the accuracy of the motor sport. To do this,it needs to establish an accurate model of Halbach permanent magnet array that contains the end-effect. With ironless moving-permanent-magnet synchronous linear motor for the study,considering the end- effect,it deduced the analytical model of Halbach array complete magnetic field with the pseudo- periodic by the modified Fourier series,and established the motor thrust analytical model using Maxwell stress tensor. Finally,to verify the accuracy and effectiveness of the proposed method,it compared the analytical solution with magnetic field FEM simulation and thrust experiment test.

Key words： Halbach magnet array end-effect pseudo-periodic modified Fourier series Maxwell stress tensor

Received: 16 April 2014 Published: 22 January 2015

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TM310

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	Song Yujing
	Zhang Ming
	Zhu Yu

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Song Yujing,Zhang Ming,Zhu Yu. Modeling of Halbach Array Magnetic Field and Motor Thrust[J]. Transactions of China Electrotechnical Society, 2014, 29(11): 61-67.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I11/61

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