Kinetic energy feedback voltage interruption protection system and method for magnetic levitation bearing

The invention provides a kinetic energy feedback voltage interruption protection system and method for a magnetic levitation bearing, and relates to the technical field of magnetic levitation. The system comprises a three-phase AC power supply, a frequency converter, a transformer, a rectifier, a Boost booster, a displacement controller, a displacement sensor, a power switching device and a magnetic levitation motor. According to the system, the DC voltage value required by the displacement controller is obtained directly by the three-phase alternating current after step-down and rectifying treatment for supplying power to the displacement controller when the power supply performs normal power supplying so that the displacement controller generates driving current to drive the rotor to levitate, the motor is converted from the electric state to the power generation state when the power supply is cut off and the kinetic energy of the motor is converted into the voltage required by the displacement controller b