Magnetic Bearing Turbomachinery Operating Experience

The theory of active magnetic bearing technology utilizing electromagnetics and closed loop feedback control is presented. A system engineering process has been developed to apply active magnetic bearings to turbocompressors of various physical sizes, horsepower ratings and performance characteristics. This process is explained and a specific example reviewed. Characteristics of a number of North American machines designed using the system engineering methodology are tabulated. Future technology applications and enhancements are outlined.