Computation and Analysis of a Novel Spherical Actuator Based on 3D Finite Element Simulation

摘要

This paper describes the computation and analysis of electromagnetic field distribution and torque characteristics of a novel permanent magnet spherical actuator based on 3D finite element method. The spatial magnetic field model, torque calculation model and 3D finite element application are presented and developed. Based on the calculation results, important, parameters such as magnetization mode, air-gap length, core material are analyzed and their effects on the actuator performances are discussed in detail. The simulation results show that the actuator can produce three degrees of freedom torque and is relatively easy to control with proper stator coil currents. This study provides the primary theoretical guide for the configuration design, optimization and control research of this actuator.