Modal Analysis of Electromagnetic Resonance for Multi-Degree-of-Freedom Spherical Motor

Liquid suspension multi-degree-of-freedom motor is a research hotspot of new multi-degree-of-freedom motor. The structure and advantages of the new hybrid driving multi DOF motor are briefly analyzed. Based on the theory of mechanics and electromagnetism, the vibration modal analysis of the motor is carried out. The mathematical model of the motor is established by finite element analysis, and the stator and rotor of the motor are simulated and analyzed. First, the modal analysis of motor stator is carried out, and the influence of coils energization for deformation and displacement of the stator mode is analyzed. Then, according to the dynamic characteristics of rotor system, the finite element method and the analytical method are compared and verified for the rotor mode, in free state. The rotor model in free state and bearing support state are compared and analyzed. Based on the gyroscopic effect, the influence of inertia force on critical speed is analyzed. The results of the simulation and analysis are referenced by the optimal design of motor.