Ultrahigh-speed disc type permanent magnet synchronous motor

Abstract

The invention provides an ultrahigh-speed disc type permanent magnet synchronous motor. The motor comprises a rotor, a stator, a thrust disc and a case, wherein the rotor consists of a rotary shaft and a rotor disc; the rotor disc consists of an aluminum sheath, a permanent magnet and a protection jacket; the rotary shaft is sleeved with the thrust disc and in clearance fit with the thrust disc; afirst annular groove is formed in the thrust disc, the aluminum sheath is embedded in the first annular groove, a second annular groove is formed in the aluminum sheath, and the permanent magnet is embedded in the second annular groove; the stator consists of a stator core and a coil winding which winds around the stator core, and the rotary shaft is sleeved with the stator core in a hollow manner. The rotor disc adopts a disc structure and is embedded on the thrust disc, the axial length of the motor is greatly reduced, so that the size of the whole motor is reduced, the clearance between the rotator disc and the thrust disc which are combined together and surrounding parts is increased, and the cooling effect is improved remarkably; the stator adopts the annularly concentrated winding,the stator core is inlaid in the case, and the size of the whole motor is reduced greatly.

Description

technical field [0001] The invention relates to the technical field of direct drive of high-speed motors, in particular to an ultra-high-speed disc-type permanent magnet synchronous motor. Background technique [0002] Radial flux permanent magnet synchronous motors are generally used in traditional high-speed and ultra-high-speed motor direct drive technology, but this kind of motor always faces two problems that need to be solved in application: one is that the power and size of the motor are affected by the axial length In order to increase the power of the motor, it is necessary to increase the axial length of the rotor, but in order to ensure the rigidity of the rotor and increase the stability of the bearing-rotor system, it is also required to reduce the axial length. Therefore, the design of the axial length is contradictory; The second is that the rotor of this motor is very difficult to dissipate heat. Because the air gap between the stator and the rotor is narrow ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an ultra-high-speed disc-type permanent magnet synchronous motor, which solves the problems of the existing motors that the rotor shaft is too long, the motor is large, and the motor has poor heat dissipation

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