Magnetic bearing device for motor-combined structure

摘要

A magnetic bearing device for use with a motor-combined structure having magnetic bearings supporting a rotatable shaft out of contact therewith and a motor for rotating the rotatable shaft. A common power supply supplies electric power to the magnetic bearings and the motor, and a motor drive power supply limits variations of the electric power supplied to the motor to at most a predetermined level with respect to variations of electric power supplied to the common power supply.