Analysis and Design Optimization of Tubular Linear Voice Coil Motor for High Thrust Force and Low Copper Loss

Abstract

In recent years, studies on the design of the tubular linear voice coil motor (TLVCM) have increased considerably. These studies propose to obtain high thrust force, high efficiency, low thrust ripple, low cost, or low volume. The magnetic equivalent circuit of the motor is created, and for any objective, only one or some parameters are emphasized. In fact, the effect of each geometric parameter of the TLVCM on performance is different and important. This study proposes multiparameter and multiobjective design optimization for high thrust force and low copper loss using a complex magnetic equivalent circuit model and nondominated sorting genetic algorithm II. Besides, the optimized motor design is analyzed by the finite element method. The average thrust force has been increased, and copper loss has been reduced with multiple interactive changes of the motor geometry, while the thrust ripple has also been reduced. According to the obtained results, a multiparameter design approach is thought to contribute to the performance of the TLVCM with the proposed approach.