Digital controller for a magnetic suspension system

Abstract

An active magnetic suspension system controlled digitally by a microprocessor has been built and operated in our laboratories. The control algorithm has integral, proportional, and derivative feedback loops. The remainder of the system including the sensor, power amplifier, and suspension coils, is of standard design. This developmental system has been used successfully to suspend small steel spheres and small rotors up to 190 g in weight, and shows promise of having wide application.