High-temperature superconducting hybrid magnetic levitation permanent magnet variable frequency motor

Abstract

The invention relates to the technical field of variable frequency motors, in particular to a high-temperature superconducting hybrid magnetic levitation permanent magnet variable frequency motor. Themotor comprises a machine box, a permanent magnet rotor and a superconducting stator. Because the high-temperature superconducting mixing and magnetic levitation characteristics of the motor are extremely sensitive to the change of the operating environment, the temperature of the superconducting stator needs to be controlled, and the heat transfer of the ambient temperature under the practical working condition easily affects the high-temperature superconducting state in the motor, thereby destroying the superconducting state of the motor operation. Therefore, through the superconducting ring arranged in the superconducting rotor and the wrapping structure of the ring cylinder on the superconducting ring, it is ensured that the superconducting ring is in a stable high-temperature superconducting state, and through the vacuum cavity between the coating covering the surface of the ring cylinder and the machine box, the temperature change generated by liquid nitrogen heating is reduced;therefore, the high-temperature superconducting state of the superconducting stator in the motor is maintained, the magnetic levitation operation state of the permanent magnet rotor is ensured, and the use effect of the high-temperature superconducting hybrid magnetic levitation permanent magnet variable frequency motor is improved.

Description

technical field [0001] The invention relates to the technical field of frequency conversion motors, in particular to a high temperature superconducting hybrid magnetic levitation permanent magnet frequency conversion motor. Background technique [0002] High-temperature superconductivity refers to the superconducting phenomenon produced by some substances with a relatively higher critical temperature than other superconducting substances in the environment of liquid nitrogen. The magnet is suspended without control, and it is applied to the motor-driven spindle, so it has the characteristics of no friction and low loss; for the introduction of the high-temperature superconducting hybrid magnetic levitation permanent magnet frequency conversion motor, please refer to: Lin Yingzhe et al., Magnetic levitation high-speed permanent magnet synchronization Comprehensive Energy Efficiency Analysis and Testing of Motors [J], Military and Civilian Technology and Products, 2017(No.12)....

AI Technical Summary

Problems solved by technology

[0003] The characteristics of the high-temperature superconducting hybrid magnetic levitation permanent magnet variable frequency motor are extremely sensitive to the parameter changes of the operating environment when the performance of the motor is enhanced. It is necessary to control the temperature of the superconducting stator to ensure the stable state of the magnetic flux generated by its winding. , and the heat transfer of the ambient temperature under practical working conditions can easily affect the high-temperature superconducting state in the motor, which in turn affects the operating effect of the motor in the high-temperature superconducting state

[0004] In the prior art, there are also some technical solutions about high-temperature superconducting hybrid magnetic levitation permanent magnet variable frequency motors. For example, a Chinese patent with application number 2009103129070 discloses a hybrid high temperature superconducting linear magnetic levitation synchronous motor, which consists of a A high-temperature superconducting linear synchronous motor composed of a double-sided stator on the frame and a high-temperature superconducting coil mover located between the stators. The double-sided stator is symmetrical about the high-temperature superconducting coil mover. It is characterized in that the motor also includes a permanent magnet track stator and the high-temperature superconducting block magnet suspension mover located above the permanent magnet track stator, and the high-temperature superconducting coil mover is installed on the high-temperature superconducting block suspension mover; this technical scheme combines a high-temperature superconducting linear synchronous motor and a high-temperature superconducting The magnetic levitation mechanism is organically combined and highly integrated, realizing the frictionless levitation propulsion of the linear motor, with large thrust, low loss, simple control, no need for guidance control, and relatively small volume and weight, which can meet some special applications. Such as maglev launch; however, this technical solution does not solve the problem that the motor is susceptible to the ambient temperature in actual working conditions, and the heat transfer from the body of the motor to the components in it destroys the operating conditions of the high-temperature superconducting state

Images