Magnetic Field Analysis of Lorentz Motors Using a Novel Segmented Magnetic Equivalent Circuit MethodReport as inadecuate




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State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, Hubei, China





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Abstract A simple and accurate method based on the magnetic equivalent circuit MEC model is proposed in this paper to predict magnetic flux density MFD distribution of the air-gap in a Lorentz motor LM. In conventional MEC methods, the permanent magnet PM is treated as one common source and all branches of MEC are coupled together to become a MEC network. In our proposed method, every PM flux source is divided into three sub-sections the outer, the middle and the inner. Thus, the MEC of LM is divided correspondingly into three independent sub-loops. As the size of the middle sub-MEC is small enough, it can be treated as an ideal MEC and solved accurately. Combining with decoupled analysis of outer and inner MECs, MFD distribution in the air-gap can be approximated by a quadratic curve, and the complex calculation of reluctances in MECs can be avoided. The segmented magnetic equivalent circuit SMEC method is used to analyze a LM, and its effectiveness is demonstrated by comparison with FEA, conventional MEC and experimental results. View Full-Text

Keywords: magnetic equivalent circuit; finite element analysis; Lorentz motor; magnetic flux density; quadratic curve magnetic equivalent circuit; finite element analysis; Lorentz motor; magnetic flux density; quadratic curve





Author: Junbing Qian, Xuedong Chen * , Han Chen, Lizhan Zeng and Xiaoqing Li

Source: http://mdpi.com/



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