Novel permanent magnet motor permanent magnet rotor

Abstract

The invention discloses a novel permanent magnet motor permanent magnet rotor. The novel permanent magnet motor permanent magnet rotor comprises a rotor iron core with a first inner hole, a left non-magnetic-conducting alloy insert embedded in the first inner hole for fastening the left end plane of the rotor iron core, a right non-magnetic-conducting alloy insert embedded in the first inner holefor fastening the right end plane of the rotor iron core, and a second inner hole formed in the left non-magnetic-conducting alloy insert and the right non-magnetic-conducting alloy insert for allowing a motor shaft to pass through. The novel permanent magnet motor permanent magnet rotor is provided with the left and right non-magnetic-conducting alloy inserts, and by combination of interference fit of the motor shaft and the second inner hole, the rotor iron core is not deformed, the contact resistance between the rotor iron core and the permanent magnet is increased, and the overlaying coefficient of the rotor iron core is improved; and by virtue of the left and right non-magnetic-conducting alloy inserts, the heat dissipation area of the rotor iron core is enlarged, the leakage flux ofthe permanent magnet flowing to the outside is reduced, the motor efficiency is improved, the temperature of the rotor iron core is lowered, the service life of the rotor iron core is prolonged, operation of a bearing in radial magnetic flux is reduced, and the bearing is not electrically corroded easily.

Description

technical field [0001] The invention relates to a novel permanent magnet rotor of a permanent magnet motor. Background technique [0002] The permanent magnet rotor of the traditional permanent magnet motor, the inner hole of the permanent magnet rotor iron core directly interferes with the motor shaft, which causes the deformation of the rotor iron core and reduces the overlapping coefficient. The efficiency of the motor and the life of the permanent magnet rotor, even the surface contact resistance of the permanent magnet becomes smaller, and demagnetization occurs. The heat dissipation of the permanent magnet rotor core is poor, which may easily cause demagnetization of the permanent magnet and decrease in motor efficiency. Since the permanent magnet rotor core is easy to conduct magnetism, it is easy to transfer to the motor shaft, causing the bearings on the motor shaft to run in radial flux, and the bearings are prone to electrical corrosion. Contents of the inventi...

AI Technical Summary

Problems solved by technology

[0002] The permanent magnet rotor of the traditional permanent magnet motor, the inner hole of the permanent magnet rotor iron core directly interferes with the motor shaft, resulting in the deformation of the rotor iron core and the reduction of the overlapping coefficient. The efficiency of the motor and the life of the permanent magnet rotor, even the surface contact resistance of the permanent magnet becomes smaller, and demagnetization occurs

The heat dissipation of the permanent magnet rotor core is poor, which may easily cause permanent magnet demagnetization and reduce the efficiency of the motor

Since the iron core of the permanent magnet rotor is easy to conduct magnetism, it is easy to transfer to the motor shaft, causing the bearing on the motor shaft to run in radial flux, and the bearing is prone to electric corrosion

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