Electromagnetic Characteristics and Modal Analysis of Multi-DOF Motors With Air-Floation

Abstract

In this paper, based on the multi-DOF motor, the structure is optimized and gas lubricated bearings are added, and the structure of the multi-of motor is proposed. Firstly, the basic structure and working principle of the motor are described. Through the analytical calculation and frequency decomposition of the electromagnetic force, the magnetic density cloud diagram and the magnetic field vector diagram of the air-floating multi-DOF motor (AMM) at the rated speed are analyzed. The variation of radial electromagnetic force (REF) with horizontal circumferential space is solved. The changes of electromagnetic force under different deflection angles and different air gap distances are calculated. Through the modal analysis of the stator and rotor of the air floating multi-degree of freedom motor, the deformation under the natural frequency is obtained by using the finite element software, and the influence of the stator material on the modal analysis is explored. It provides new ideas for the design of multi-DOF motors.

Keywords

• Multi-DOF motor
• gas lubrication
• electromagnetic properties
• finite element analysis
• radial electromagnetic force
• modal analysis