A magnetic suspension high-speed permanent magnet motor rotor structure

Abstract

A rotor structure of a magnetic suspension high-speed permanent-magnet motor comprises a main shaft, a magnetic bearing iron core laminated layer, a high-strength alloy sheath, a rare-earth permanent magnet and a load shaft, wherein the magnetic bearing iron core laminated layer is formed by laminating silicon steel sheets, the high-strength alloy sheath is a nickel-chrome iron alloy material which can conduct electricity and cannot conduct magnetism conduction, the permanent magnet is a high-energy density samarium cobalt rare-earth permanent-magnet material, the sheath and the permanent magnet are assembled in an interference fit manner, and an air gap is reserved between the permanent magnet and the main shaft. The high-speed permanent-magnet motor rotor adopts a solid permanent-magnet structure; compared with a surface-mounted permanent-magnet rotor structure, the rotor structure has the advantages that the rotor strength and the motor energy density are enhanced, and the motor efficiency is improved; and by adoption of the self-cooling and high-strength alloy sheath, rigidity is provided for a rotor assembly, a phenomenon of assembly loosening of a surface-mounted rotor under the function of high-speed centrifugal force is thoroughly changed, and a risk of irreversible demagnetization of the permanent magnet due to overheating is prevented.

Description

technical field [0001] The invention relates to a magnetic levitation high-speed permanent magnet motor rotor structure, in particular to a high-energy-density high-speed permanent magnet motor. Background technique [0002] Due to the advantages of high speed, high power density, simple structure, small size, and reliable operation, high-speed permanent magnet motors can be used in industrial equipment such as blowers and compressors to achieve high-speed direct drive. It has a remarkable effect on improving the reliability of the whole machine system and reducing fuel consumption and pollutant discharge. The rotor system of the high-speed permanent magnet motor is the premise of realizing the safe and reliable operation of the whole motor, and the structural design of the rotor assembly is also one of the core technologies in the design of the high-speed permanent magnet motor. [0003] The rotor of high-speed permanent magnet motor often runs at tens of thousands or even...

AI Technical Summary

Problems solved by technology

In order to achieve high-speed and stable operation of the motor, ensure the integrity of the rotor assembly at high speed, and prevent the irreversible demagnetization of the rotor permanent magnet at high temperature, it is necessary to improve the existing technology to solve the technical shortcomings

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