Thrust and normal force characteristics analysis of linear synchronous motor for direct drive conveyer

Yu-wu Zhu; Do-sun Kim; Yun-hyun Cho

doi:10.1117/12.784243

9 January 2008 Thrust and normal force characteristics analysis of linear synchronous motor for direct drive conveyer

Yu-wu Zhu, Do-sun Kim, Yun-hyun Cho

Proceedings Volume 6794, ICMIT 2007: Mechatronics, MEMS, and Smart Materials; 67940O (2008) https://doi.org/10.1117/12.784243
Event: ICMIT 2007: Mechatronics, MEMS, and Smart Materials, 2007, Gifu, Japan

Abstract

The problem in improving the high positioning precision of permanent magnet linear synchronous motor (PMLSM) for direct drive conveyer is the large detent force, which contains two components: one is the cogging force caused by the interaction between the permanent magnet (PM) and the iron core, the other is the end effect caused by the finite mover length. In this paper a force compensator in the field oriented control (FOC) algorithm is employed to reduce this detent force, so the thrust and the normal force characteristics analysis of PMLSM are of the most importance. First the characteristics of the thrust and the normal force are simulated by finite element method (FEM), and the relation of the thrust and the normal force to the q-axis current is analyzed. Then the components of detent force are defined by Fourier series using the curve fitting method, and compensated by injecting the instantaneous currents using the FOC method. Finally the dynamic characteristics of this PMLSM for direct drive conveyer are investigated, and the numerical results are reported to validate the effectiveness of this proposed method.

Citation Download Citation

Yu-wu Zhu, Do-sun Kim, and Yun-hyun Cho "Thrust and normal force characteristics analysis of linear synchronous motor for direct drive conveyer", Proc. SPIE 6794, ICMIT 2007: Mechatronics, MEMS, and Smart Materials, 67940O (9 January 2008); https://doi.org/10.1117/12.784243

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