High Speed Generator Active Magnetic Bearing's Research On Dynamic Analysis And Control Strategy

Active magnetic bearing(AMB) is a novel supporting component, and attracting great attentions because of the advantage of no mechanical touch, no frays and free lubrication compared with the traditional bearing. By domestic academics and the industrial areas of concern, AMB also became the focus of research areas and home academic and industrial areas of concern, and became the focus of research. The main work of the paper:1. The paper establish a magnetic bearing the mathematical model. The nonlinear magnetic bearing mechanical model can be derived from the electromagnetic theory, and linear processed at the equilibrium point. By mechanical analysis of the rotor, we can get its mathematical model. The magnetic bearings with open-loop instability used a PID closed-loop control.2. It's the first step to calculate and derivate Magnetic bearing structural parameters. In this paper, it's detailed derivate various geometrical parameters of the relationship of the radial and axial magnetic bearings of the rotor and the stator.3. By combining ANSYS with MATLAB, we can obtain the dynamic characteristics of the magnetic bearing. Fuzzy control box of MATLAB simulates the fuzzy PID control on the magnetic bearing, and compared traditional PID control with variable PID control parameters . Simulation results show that variable parameter PID control improved rotor Floating process.4. The paper Includes analysis and development of the active magnetic bearings malog PID control system hardware is complated, and a design of the the various components of hardware circuits.In this paper, we use PID control strategy. The coupling characteristic of magnetic suspension rotor which is in five degree of freedom are analyzed, drawing the conclusion that the system can apply decentralizing control under the condition of 20000r/min. Based on a mathematical model, PID control parameters are setted by trail.