Magnetic suspension motor rotor protection device and method

The invention belongs to the technical field of magnetic suspension, and particularly relates to a magnetic suspension motor rotor protection device and method. The device comprises a base and an inner sliding rail, the base is annular and is mounted on the magnetic suspension motor shell; at least two inner sliding rails are arranged, and the head ends and the tail ends of the at least two inner sliding rails are in contact to form a circular ring; a spring is arranged on the outer ring of each inner sliding rail, each inner sliding rail is connected with one end of the corresponding spring, an electromagnet is fixedly arranged at the other end of each spring, and the electromagnets are fixedly arranged on the base; by arranging the electromagnet and the spring, when the magnetic suspension motor works normally, the magnetic force of the electromagnet is converted into the elastic force of the spring, energy loss is reduced, the spring is compressed to attract the inner sliding rail and the outer guide rail