Magnetic Levitation Permanent Magnet Linear Synchronous Motor Electromagnetic Analysis

Abstract:

According to the problem of the friction between the mover and the static guide rail in the linear motor drive system of CNC machine tool, this paper proposed the direct magnetic levitation permanent magnet linear synchronous motor to achieve friction-free feed. The mover of the direct magnetic levitation permanent magnet linear motor consists of two sets of windings. One is the thrust winding, which is used to generate electromagnetic thrust, the other is the suspension winding, which is used to generate magnetic levitation force. The mathematical model of the motor’s electromagnetic thrust and levitation force is derived by the Maxwell stress tensor method. Ansoft is used for making finite element analysis of the motor’s electromagnetic thrust and levitation force. The results verified the correctness of the mathematical model. The feasibility of friction-free feed with two-winding direct magnetic levitation permanent magnet synchronous motor is proved.

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 5233-5237
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.5233
• Online since: November 2011
• Authors: Yi Peng Lan, Cheng Jun Li
• Keywords: Electromagnetic Thrust, Finite Element Analysis (FEA), Friction-Free Feeding, Levitation Force, Levitation Permanent Magnet Linear Synchronous Motor, Linear Drive, Pairs of Windings, Stress Tensor Method

References

[1] Tian Lulin, Zhang Kaoshe, Wang Deyi, et, al. Research on the levitation and guidance magnetic force of permanent magnetic guideway[J]. Trans on China Electro- technical Society, 2008, 28(21): 135-139.

[2] Liu Dejun, Guo Qingding, Weng Xiuha. Dynamic Thrust decoupling control of linear motor driving magnetic suspension platform [J]. Journal of Shenyang University of Technology, 005, 27(1): 43-46.

[3] Guo Qingding, Wang Chengyuan, Zhou Meiwen, et, al. Precision control of linear AC servo system [M]. Beijing: Machine Industry Press, (2000).

[4] Oshima M, Chiba A, Fukao T, et al. Characteristics of a permanent magnet type bearingless motor [J]. IEEE Trans on IA, 1996, 32 (2); 363-370.

DOI: 10.1109/28.491485

[5] Li Yong, Hu Yuwen, Huang Wenxin, et, al. Voltage control of dual stator-winding induction generator system using space vector modulation[J]. Trans on China Electro-technical Society, 2008, 28(23): 112-118.

DOI: 10.1109/vppc.2008.4677571

[6] Lu Qinfen. Characteristic research on linear synchronous motor [D]. Hangzhou: Zhejiang University, (2005).

[7] Wang Xudong. Study on the unified analytical method-theoryand its applications for PMLSM [D]. Xi'an: Xi'an Jiaotong University, (2002).