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Shape Optimization of PMLSM Stator for Reduce Thrust Ripple Components Using DOE  

Kwon, Jun Hwan (Graduate School of Future Convergence Engineering, Kongju National University)
Kim, Jae Kyung (Industrial Technology Research Institute, Kongju National University)
Jeon, Euy Sik (Graduate School of Future Convergence Engineering, Kongju National University)
Publication Information
Journal of the Semiconductor & Display Technology / v.20, no.4, 2021 , pp. 38-43 More about this Journal
Abstract
Permanent magnet linear synchronous motor (PMLSM) is suitable for use in cleanroom environments and have advantages such as high speed, high thrust, and high precision. If the stators are arranged in the entire moving path of the mover, there is a problem in that the installation cost increases. To solve this problem, discontinuous armature arrangement PMLSM has been proposed. In this case, the mover receives a greater detent force in the section where the stator is not arranged. When a large detent force occurs, it appears as a ripple component of the thrust during PMLSM operation. If the shape of the stator is changed to reduce the detent force, the characteristics of the back EMF are changed. Therefore, in this paper, the detent force and the harmonic components of back EMF were reduced through multi-purpose shape optimization. To this end, the FEA model was constructed and main effect analysis was performed on the major shape variables affecting each objective function. Then, the optimal shape that minimizes the objective function was derived through the response surface analysis method.
Keywords
PMLSM; Thrust ripple; DOE; Shape optimization; Detent force; Back-EMF;
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