Research On Electric Control System Of Active Magnetic Bearings

The effects of incomplete differential PID and fuzzy adaptive PID control strategies on dynamic characteristics of the magnetic bearing system are separately analyzed by MATLAB toolbox. The digital controller circuits based on TMS320F28335 DSP and the corresponding control programs of incomplete differential PID and fuzzy adaptive PID are developed. By the two digital controllers, the magnetic levitation spindle prototype can operate stably at 60,000 rotations per minute. Dynamic characteristics of the magnetic levitation spindle prototype with the two digital controllers are separately investigated.Aiming at the requirements of flywheel battery for vehicle, the two-level and three-level digital integrated controllers based on digital signal processor are separately developed, which can replace the displacement controller and some parts of the power amplifier. The corresponding control algorithm of the displacement controller, current controller and current phase shift are programmed. The influences of the digital integrated controllers on static and dynamic performances of the magnetic bearing system are investigated by experiments.Finally, the test device of flywheel battery for vehicle is developed, including the flywheel rotor assembly, foundation rack, active magnetic bearing and other parts. The main design parameters of the parts are introduced. The initial operation experiments of the test device are also carried out.