Method and apparatus for controlling rotation of a magnetic rotor

摘要

A method of capturing a sensorless magnetic rotor for acceleration and rotation with a rotating magnetic field generated by a stator is used in a turbogenerator including a compliant foil fluid film radial bearing. The method includes energizing the stator to generate a magnetic field and slowly rotating the magnetic field approximately 360° to capture the magnetic rotor. The rotational speed of the magnetic field is quickly accelerated to quickly accelerate the magnetic rotor, thereby quickly reaching a liftoff speed associated with the compliant foil fluid film radial bearing to prevent damage thereof.