Magnetic Field Calculation and Dynamics Simulation of a Permanent Magnetic Hybrid Driven 3-DOF Motor

Abstract

In view of the poor precision of existing deflection movement control and low speed of multi-degree-of-freedom motor rotation speed, a novel type of permanent magnet type 3-DOF hybrid driven motor is proposed, the motor contains two part named lateral rotation module and internal deflection modules. By using Halbach permanent magnet array, the magnetic field shielding and optimization of two modules inside and outside the motor are realized, and the magnetic field characteristics of the motor are improved. Using the analytical and finite element methods, the magnetic field characteristics and distribution of the permanent magnet of the motor are analyzed and proved. The dynamic model of the motor is established and analyzed. The back EMF of the physical motor is tested and verifies the accuracy of the finite element model. The results provide a new theoretical basis for the follow-up optimization of this kind of motors.