The Rotor Vibration Research Of Vehicle Magnetic Levitation Flywheel Battery

Flywheel battery is a novel energy storage device that can realize conversion between mechanical energy and electric energy. It has many advantages including high energy storage, high power, no pollution, high storage efficiency, wide application, noise free, long cycle life, and so on. Flywheel battery is a typically electromechanical and electromagnetic product with some main parts: high-speed flywheel, magnetic bearing system, motor/generator, etc. The study of flywheel battery concerns the intercross of many disciplines, such as mechanism, material, electronic engineering, heat engineering, computer, and so on. In this dissertation, the math model of Vehicle Magnetic Levitation Flywheel Battery (VMLFB) rotor for the vibration influence of road surface input, is constructed and simulate the math model.The main contents of this dissertation are as following:In Chapter 1, the background, source, purpose and significance of the subject are introduced;the work theory, configuration composing and performance of flywheel battery are listed;the international research situation and application prospects of flywheel battery are also presented. Based on this, the author brings up the main studying contents of this dissertation.In Chapter 2, 7-DOF-model of vehicle system vibration is established. It is detailed derived from theory analysis to differential equation, and its damping matrix, rigidity matrix and quality matrix are given.In Chapter 3, it is composed of three parts. The math model of VMLFB rigid rotor by PD regulators and the math model of its flexible rotor by concentrated parameter method are established respectively. Bases on vibration theory, the computation method of the two-math model has already solved.In Chapter 4, by using example data with MATLAB software, VMLFB rigid rotor within the time field is simulated;Subsequently the dynamic modeof flexible rotor is simulated by concentrated parameter method;at last using Riccati Transfer Matrix method, transferred the actual rotor by elasticity bearing into reasonable single disc rotor model, simulated the mode vibration system.In Chapter 5, the main research findings and conclusions of whole thesis are summarized, the main innovations are mentioned, and the future research projects of the flywheel battery are proposed.As a novel and green power battery, the flywheel battery has broad application prospects. In the dissertation, the research of rotor vibration for VMLFB, not only overcome many theory and technical difficulties, but also has great value in science research.