Stability Experiment of the High-Speed Active Magnetic Bearing-Flywheel System in the Rotating Frame

摘要

The active magnetic bearings (AMBs) cangreatly improve the stability of the flywheel system andincrease the maximum flywheel speed. However, if theactive magnetic bearing-flywheel system (AMB-FS) isplaced in a rotating frame, the strong gyroscopic effectof high-speed flywheel will greatly affect the systemstability. In this study, to realize the high stability of theAMB-FS at ultra-high flywheel speed with low powerconsumption, the cross feedback PID control was appliedin the AMB-FS. The system stability and the performanceof AMBs were studied. In the experiment, the gyroscopiceffect of the flywheel was effectively suppressed. In thevacuum environment, the flywheel could runs stably atany speed within the range of 0 to 30000 rpm, and thepower consumption of AMBs was only 17.82 W and thesystem had no need of cooling measures. The flywheelspeed could exceed 31200 rpm and still possessed thespeeding potential. The rotating frame test showed that themaximum frame rotational speed could reach 3.5 deg/sat the rated flywheel speed of 30000 rpm, and the AMBFSrun stably.