Design and optimization of a novel rotary-linear motor with SPM combining voice coil structure

Abstract

This paper proposes and optimizes a novel rotarylinear motor combining the surface-mounted permanent-magnet (SMPM) motor and voice coil motor structure (RL-SVCM) to achieve rotary and linear motion with low rotary torque ripple and smooth linear force. The step skewed method was used to perfect the rotary motion; based on the equivalent magnetic circuit analysis, the Kriging method and genetic algorithm were used to perfect the linear motion. The topology, operating principle, and the optimization parameters are described. All analysis results are given under 3D finite element method (FEM) for revealing the low rotary ripple and smooth linear force.