Research On The Suppression Of Gyroscopic Effect Of Active Magnetic Bearing-Flywheel Energy Storage System

The flywheel energy storage system is a kind of high efficiency ways for energy storage and conversion. It makes use of the high speed flywheel to storage kinetic energy and be converted to electric energy by the conversion device according to requirement. It has many advantages such as high power, high specific energy, long life-time, no pollution and charge quickly. Now, it has been applied in uninterrupted power supply, pulsed power application and aerospace applications.Active magnetic bearing (AMB) is a new support technology, which use controllable electro-magnetic force to realize the rotor suspension. Because of its no contact, no wear, no need of lubrication and dynamic adjustable, it fit the high speed rotating system like the flywheel energy storage system. Active magnetic suspension flywheel is a researching focus at the present time in the world. However, for flywheel rotors with significant ratios of moments of inertia, gyroscopic effects greatly influence the rigid modes frequencies and the stability of the flywheel rotor, especially at high rotational speeds. Hence, Traditional decentralized PID control controller are no longer suitable any more.A single degree-of-freedom and four degree-of-freedoms model were built based on the analysis of the flywheel rotor system. We analyse the principle of the gyroscopic effects and the influence of various types of force and moment acted on flywheel rotor from the mechanics perspective. The stability of all kinds of rotating speed of flywheel rotor is analysed in detail which point a suitable direction for the design of control algorithm.Base on the stability analysis, the basic control principle of linear state feedback decoupling control, cross feedback control and modal decoupling control are introduced and their performances are simulated through MATLAB/Simulink. Base on the dSPACE system, the designing process and debugging process of the hardware system and software system are introduced. Finally, the displacement curves and trajectory of different degrees of freedom of flywheel rotor are analysed at different rotating speed, and the designed controller obviously weakened the influence of gyroscopic effects and improve the dynamic behaviours and capacity of anti-interference of active magnetic bearing-supported flywheel energy storage system with a significant gyroscopic effect.