A high-speed permanent magnet motor rotor including an axially stressed magnetically permeable sheath

Abstract

The invention discloses a high-speed permanent magnet motor including an axial-forced magnetic-conductive jacket. The high-speed permanent magnet motor comprises a rotating shaft, a front hooped plateand a back hooped plate are arranged on an axial direction of the rotating shaft; two ends of a plurality of magnetic-conductive jacket plate plates are fixedly connected with the front hooped plateand the back hooped plate to form electric insulation; a rotor iron core is arranged between the front hooped plate and the back hooped plate and fixedly connected with the rotating shaft; the permanent magnet is fixedly arranged between the roto iron core and each magnetic conductive jacket plate; the amount of each of the magnetic conductive jacket plate and the permanent magnet is same as the pole number of the rotor; each of the front hooped plate and the back hooped plate is made from non-magnetic conductive material, a first clearance is formed between the adjacent magnetic conductive jacket plates, a second clearance is formed between the adjacent permanent magnets, and the third clearance is arranged among the permanent magnet and the front hooped plate and the third hooped plate.The structure disclosed by the invention can reduce the eddy loss in the jacket, inhibit the rotor temperature rising, and improves the magnetic load and torque output capacity of the motor at the same time.

Description

technical field [0001] The invention relates to a motor rotor, in particular to a high-speed permanent magnet motor rotor including an axial force magnetic conduction sheath, which belongs to the technical field of motors. Background technique [0002] In the application field of high-speed permanent magnet motors, the usability of the embedded rotor structure is not good due to the influence of the strength of the rotor iron core lamination and the magnetic bridge leakage. When the surface speed of the rotor exceeds a certain value, the rotor of the high-speed permanent magnet motor generally adopts a surface-mounted structure. The surface-mounted permanent magnet is pasted or set on the rotor core. In order to offset the centrifugal force on the permanent magnet, a non-magnetic sheath is placed on the periphery of the permanent magnet, and an interference fit is adopted between the non-magnetic sheath and the permanent magnet. . The motor shaft of the surface-mounted str...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects of the above-mentioned prior art, the present invention provides a high-speed permanent magnet motor rotor including an axially stressed magnetically conductive sheath, which solves the problem of low magnetic load, poor heat dissipation of the rotor structure, and large rotor eddy current loss in the existing high-speed permanent magnet motor And other issues

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