Simulation and Experimental Study on the Characteristics of Magnetic-Gas Mixed Suspension Spherical Joint

摘要

Nowadays, the research on maglev motor has mainly focused on the electromagnetic levitation mechanism and control strategy for the rotor. Due to the fact that the characteristics of the air gap flow-field can directly affect the static and dynamic performance of the motor, there exists a big error between the theoretical analysis and practical situation of the rotor movement. However, the bearing characteristics of air gap flow-field has not been taken into account well. Therefore, the air gap flow-field for a magnetic-gas mixed suspension spherical joint is addressed. First, the formation mechanism for a magnetic-gas mixed suspension spherical join rotating along an arbitrary axis in the three-dimensional rotating magnetic field is analyzed, and the structure of the magnetic-gas mixed suspension spherical joint is designed. Then, the static and dynamic characteristics of the motor are investigated by studying the air gap flow-field of the magnetic-gas mixed suspension spherical joint in terms of the aerodynamics. The mathematical models of the static and dynamic pressure and kinetic parameters for the air gap flow field are established. Finally, the experiment study is made to confirm the influence on the static bearing capacity and dynamic characteristics of the motor, which is generated by the air gap flow-field of the magnetic-gas mixed suspension spherical joint.