Optimal pole width ratio for high force density linear switched reluctance motors

doi:10.16511/j.cnki.qhdxxb.2018.22.017

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Journal of Tsinghua University(Science and Technology) ›› 2018, Vol. 58 ›› Issue (5) : 469-476. DOI: 10.16511/j.cnki.qhdxxb.2018.22.017

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Optimal pole width ratio for high force density linear switched reluctance motors

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Abstract

The double salient structure significantly reduces the forces in a linear switched reluctance motor (LSRM). The structure is then optimized for high force densities. The pole width is the key parameter in the double salient structure with this paper focusing on the optimal pole width ratio for a high force density LSRM using qualitative and quantitative analyses and experimental measurements. The qualitative analysis based on a linear flux linkage model shows a maximum average force for various translator and stator pole widths. Then, a finite element analysis (FEA) based parametric modeling method is used to validate the results and to calculate the optimal pole width range. Force measurements then agree well with the FEA results. They both show that the optimal stator pole width ratio is 0.4 to 0.45 and the optimal translator pole width ratio is 0.45 to 0.5 for a high force density in the LSRM. The optimal width ratio does not change with the air gap or slot depth.

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linear switched reluctance motor / force density / finite element analysis / pole width

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LÜ Jiangwei, ZHOU Kai. Optimal pole width ratio for high force density linear switched reluctance motors[J]. Journal of Tsinghua University(Science and Technology). 2018, 58(5): 469-476 https://doi.org/10.16511/j.cnki.qhdxxb.2018.22.017

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