Vibration Mechanism Analysis of Magnetic Levitation Rotor System for Low Temperature Waste Heat Power Generation

By using high speed maglev generator, the efficiency of low temperature waste heat generation system can be improved significantly. In this paper, the unbalanced magnetic pull (UMP) in the maglev generator, caused by dynamic and static eccentricity, is calculated theoretically and the analytical expression of the UMP is obtained based on Maxwell stress tensor method. Then, the vibration of a maglev rotor system is under the action of the UMP and the mass unbalance force is analyzed by the numerical method. Lastly, the effects of different eccentricities, torque angles and loads on the rotor vibration are discussed in detail. The conclusions for the maglev rigid rotor system are useful for the future research.