| MECHANICAL ENGINEERING |
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Optimal pole width ratio for high force density linear switched reluctance motors |
| LÜ Jiangwei, ZHOU Kai |
| Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China |
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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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| Keywords
linear switched reluctance motor
force density
finite element analysis
pole width
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Issue Date: 15 May 2018
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2018,
Vol. 58
