Fault tolerant Magnetic Bearings

摘要

A fault tolerant magnetic bearing system was developed and demonstrated on a large fiexible-rotor test rig. The bearing system comprises a high speed, fault tolerant digital controller, three high capacity radial magnetic bearings, one thrust bearing, conventional variable reluctance position sensors, and an array of commercial switching amplifiers. Controller fault tolerance is achieved through a very high speed voting mechanism which Implements triple modular redundancy with a powered spare CPU, thereby permitting Failure of up to three CPU modules without system failure.