Research On Dynamics Characteristics Of Maglev Rotor Under Vehicle Working Condition

Because of energy shortages and environmental pollution, energy-saving hybrid cars and pollution-free electric vehicles are the future development trends. Flywheel battery with its high specific energy, high power density, small size, quick charging, long life, without any pollution, has become one of the most promising battery powers which used in the electric vehicle and hybrid electric vehicle. As one of the five key technologies of flywheel battery, the dynamics of magnetic bearings not only has related to the stiffness and damping of magnetic bearings, but also related to the external interference frequency. Due to the maglev technology involved in mechanical, material, electronics, control and sensor etc domain knowledge, its support characteristics is difficult which researched on, especially in the automotive environment magnetic bearing technology is the key technology.Since flywheel battery rotor is supported on a moving vehicle, its dynamics characteristics not only depend on magnetic suspended rotor itself, but also depend on dynamics characteristics of automobile. The movement of the vehicle results in the prominence dynamics characteristics changes of flywheel battery magnetic suspended rotor. Thereby, studying dynamics characteristics of magnetic suspended rotor on board is the theory foundation of the application of maglev rotor on movement carrier.In this paper, dynamic of the maglev rotor fixed upon the vehicle is researched by use of experiments. First of all, analyzed the vehicle-body vibration under the influence of a combination of factors, such as road spectrum, vehicle chassis and so on. The vehicle-body' vibration characteristics at different factors influence can be achieved. And then, used Finite Element to analysis the mode of tray shaped maglev rotor and compared it with its dynamics performance when in stable suspended working. Secondly, accordance to exist conditions ours laboratory has, established the physical model of vehicle flywheel battery rotor experimental system for the vibration influence of road surface input. Finally, the experiment is designed according to physical modal, and determines the experimental conditions to build the overall framework of its experiment system.According to the vibration characteristics of the vehicle-body, simulating dynamics characteristic of on-board maglev rotor under different working condition through loading sinusoidal excitation and random excitation on it. Through the analysis of the data, the dynamics of magnetically levitated rotor is summed up in order to lay the foundation for realizing the application of Maglev vehicle flywheel battery.