Five-degree-of-freedom magnetic levitation motor without thrust disc

Abstract

The invention discloses a five-degree-of-freedom magnetic levitation motor without a thrust disc. The motor comprises a rotating shaft, a two-degree-of-freedom radial suspension assembly, a one-degree-of-freedom axial suspension assembly, a two-degree-of-freedom radial suspension bearingless motor assembly and an external stator yoke, wherein the two-degree-of-freedom radial suspension assembly generates a radial suspension force, and a rotor iron core of the two-degree-of-freedom radial suspension assembly is coaxially assembled with the rotating shaft; the one-degree-of-freedom axial suspension assembly is used for generating the axial suspension force, and the rotor iron core of the one-degree-of-freedom axial suspension assembly is coaxially assembled with the rotating shaft; the two-degree-of-freedom radial suspension bearingless motor assembly generates a radial suspension force and can drive the rotating shaft to rotate; the external stator yoke surrounds and supports the two-degree-of-freedom radial suspension assembly, the one-degree-of-freedom axial suspension assembly and the two-degree-of-freedom radial suspension bearingless motor assembly; and radial magnetizing directions of an annular permanent magnet of the two-degree-of-freedom radial suspension assembly and the annular permanent magnet of the one-degree-of-freedom axial suspension assembly are opposite, anda permanent magnet bias magnetic field is formed. According to the five-degree-of-freedom magnetic levitation motor, an axial suspension force can be generated to realize axial levitation of the rotorwithout configuring an axial thrust disc so that a critical rotating speed of the five-degree-of-freedom magnetic levitation motor is increased, and overall disassembly and assembly efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of magnetic levitation motors, in particular to a five-degree-of-freedom magnetic levitation motor without a thrust disk. Background technique [0002] The magnetic levitation motor uses electromagnetic force to realize the radial and axial five-degree-of-freedom support of the motor rotor, so it has the characteristics of non-contact and frictionless operation, and has broad application potential in the fields of high-speed spindle motors, high-speed flywheel energy storage motors, and high-speed air compression motors. . [0003] However, when the traditional magnetic levitation motor realizes the suspension of the rotor with five degrees of freedom, the generation of the suspension force of the axial degree of freedom often needs to be equipped with an axial thrust plate to realize it. The introduction of the thrust plate leads to the whole machine system: 1. The critical speed is reduced, which limits t...

AI Technical Summary

Problems solved by technology

The introduction of the thrust plate leads to the whole machine system: 1. The critical speed decreases, which limits the increase of the machine speed; 2. The existence of the axial thrust plate makes the assembly process of the whole machine complicated and reduces the disassembly efficiency of the whole machine

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