Electrical System Control Laboratory
Prof. Toshiya YOSHIDA
Power Systems, Electric Machinery
Electronic, Information Systems
Research of A Sensorless Magnetic Bearing
A magnetic bearing suspends a motor rotor with a principle of maglev trains e.g. "Linimo." Levitating the rotor, super high speed rotation and energy saving are achieved. In the magnetic bearing control, a computer-based controller or sophisticated analog controller has to be employed. In addition, this system needs position sensors which have high resolution of less than 1 micron-meter. To simplify the configuration, sensorless control methods have been investigated. A practical sensorless system, however, has not been developed yet. We propose a new sensorless magnetic bearing circuit. This method gives high stability required for industry applications.
Sensorless magnetic bearing
Patent certificate of the proposed method