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Shape Optimization of a Switched Reluctance Motor Having 6/4 Pole Structure for the Reduction of Torque Ripple Using Response Surface Methodology  

Choi, Yong-Kwon (LS 산전)
Yoon, Hee-Sung (충북대 전기공학과)
Koh, Chang-Seop (충북대 전기전자컴퓨터공학부)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers B / v.55, no.12, 2006 , pp. 608-616 More about this Journal
Abstract
Recently, a switched reluctance motor is widely used in various industries because it has many advantages such as a simple structure, robustness, less maintenance, high torque/weight ratio, and easy speed control over other types of motors. However, a switched reluctance motor inherently produces acoustic noise and vibration caused by torque ripple. Applications of these motors where silent operation is desirable have thus been limited. In this paper, a new stator pole face having a non-uniform air-gap and a pole shoe attached to the lateral face of the rotor pole are suggested in order to minimize torque ripple. The effects of each design parameter are validated using a time-stepping finite element method. The parameters are optimized by utilizing response surface method (RSM) combined with (1+1) evolution strategy. The result shows that the optimized shape gives higher average torque and drastically reduced torque ripple.
Keywords
Switched reluctance motor; torque ripple; response surface ethodology;
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