Theoretical Analysis on Lateral Vibration Characteristics of Rotor Considering Electromagnetic Torque

The air compressors, directly driven by the highspeed permanent magnet synchronous motor, were used in the hydrogen energy transportation, such as hydrogen fuel cell vehicles and hydrogen energy railway trains. The influence of the electromagnetic torque, generated by the deflection angle, on the lateral vibration of the rotor, needs to be studied. This paper presented the dynamic equation of the rotor supported by foil gas bearings. The electromagnetic torque was considered, and the dynamic equations of rotor lateral vibration were established. The numerical calculations of the dynamic equations were carried out. The values of lateral vibration were analyzed. The influence of electromagnetic torque on the lateral vibration was studied, and the results of rotor displacement were obtained. The theoretical analysis conducted in this paper can provide the theoretical basis for research on electromechanical coupling dynamics.