Abstract
In this paper, the optimal design of a brushless direct current motor with a three-dimensional (3D) structure using the response surface methodology (RSM) is presented. There were two optimization goals: reduction of the cogging torque and maintenance of the back electromotive force to prevent performance degradation. For motors with a 3D structure, a 3D finite element method analysis is essential, though it requires considerable computation time. Therefore, to reduce the optimal design time, the 3D structure was placed on the 2D plane. Thereafter, a 2D corrected model was applied to the RSM. For the validity of the technique, the analysis results of the initial 3D model, 2D model, and 2D corrected model were compared, and the results of the optimal design 3D model, 2D corrected model, and experiment were compared.
Highlights
As the goal all waswas two,toand the relational expression between factors and values can of factors this study reduce the cogging torque while maintaining theresponse back electromotive force (EMF), variables be expressed and efficiently
To improve the performance of the motor, reducing the cogging torque and maintaining the back EMF were selected as the objective functions
Because it is difficult to perform 2D finite element method (FEM) on models with 3D structures and 3D FEM analysis takes considerable time, 3D structures were analyzed by using an equivalent 2D structure
Summary
As the goal of this study was to reduce the cogging torque while maintaining the back
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