High-speed permanent magnet motor rotor structure

Abstract

The invention relates to a high-speed permanent magnet motor rotor structure which comprises a rotor iron core, multiple permanent magnets and ventilation holes. The multiple permanent magnets are inlaid in the rotor iron core in the peripheral direction of the rotor iron core, and the ventilation holes are distributed among the adjacent permanent magnets. The high-speed permanent magnet motor rotor structure is technically characterized in that a motor is of a two-pole rotor structure, the rotor iron core is made from a high-strength magnetic conductive carbon steel material and forms an integrated structure with a rotary shaft, the multiple permanent magnets are arranged in the peripheral direction of the rotor iron core and inlaid in the rotor iron core, the rotor strength is improved,eddies on the permanent magnets are decreased, meanwhile the stress exerted to the permanent magnets in the rotor iron core is also reduced, the ventilation holes are symmetrically distributed betweenthe adjacent permanent magnets with respect to the rotor iron core,, the vibration and noise of the motor are effectively reduced, magnetic isolation among the permanent magnets is promoted, and theheat dissipating effect of a rotor is improved. The rotor structure of the high-speed permanent magnet motor is simple and compact, the cost is saved, a heat dissipating effect is saved, and the mechanical strength of the rotor and the running reliability of the motor are improved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a rotor structure of a high-speed permanent magnet motor. Background technique [0002] Due to high speed, high power density and small size, high-speed motors can effectively save materials; due to the small moment of inertia, the dynamic response is fast; high-speed motors can be directly connected to working machines or loads, eliminating the need for traditional mechanical transmission devices , thus reducing noise and improving the efficiency of the transmission system. The research and application of high-speed motors meet the needs of economic development for energy saving and emission reduction. At present, it has become one of the research hotspots in the field of international electrical engineering. It has broad application prospects. [0003] Permanent magnet motors are suitable for high-speed motors due to their simple structure, high power density, no excitation lo...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new type of high-strength high-speed permanent magnet motor rotor structure to solve the problems of difficult heat dissipation, serious noise and vibration, and poor rotor strength during the high-speed operation of the existing permanent magnet motor

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