A Sensor-Fault Tolerant Control Method of Active Magnetic Bearing in Flywheel Energy Storage System

Flywheel energy storage system is a promising technology of high power storage and energy conversion for Hybrid Electric Vehicles (HEVs) and Electric Vehicles (EVs). As the safety issue is one of the top priorities of this technology, especially when the Active Magnetic Bearing (AMB) is utilized, a sensor-fault tolerant control method of AMB is proposed in this paper. In the method, specially designed wavelet filters are utilized to detect the sensor fault and self-sensing technology of AMB is applied to maintain system stability after the fault. At last, the performance of this control method is validated through simulations in MATLAB/Simulink.