Motor rotor and permanent magnet motor

Abstract

The invention provides a motor rotor and a permanent magnet motor. The motor rotor comprises a rotor iron core (1), multiple permanent magnet slots (2) are arranged along the circumference of the rotor iron core (1), the permanent magnets (3) are arranged in the permanent magnet slots (2), a magnetic shield slot (4) is arranged at the inner side of the permanent magnet slot (2), the width of the magnetic shield slot (4) is gradually reduced along a radial reaction of the central axis close to the rotor iron core (1); a strip-shaped first magnetic shield hole is arranged between two adjacent magnetic shield slots (4), a magnetic shield bridge is formed between the first magnetic shield hole and the magnetic shield slot (4), and the magnetic shield bridge and the magnetic pole center line are in a preset included angle. According to the motor rotor provided by the invention, the magnetic shield effect can be effectively improved, the flux leakage at the inner side of the motor is reduced, the magnetizing saturation of the motor rotor is improved, and the motor performance is improved.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a motor rotor and a permanent magnet motor. Background technique [0002] The motor with permanent magnet tangential magnetization structure can produce higher air gap flux density than permanent magnet radial magnetization motor due to its "magnetic concentration" effect, so that the motor has a larger torque / current ratio and torque / volume ratio , are increasingly being used in servo systems, electric traction, office automation, household appliances and other occasions. [0003] In the tangential permanent magnet motor of the prior art, since the rotor permanent magnets are radially arranged, a part of the permanent magnets is deeply buried inside the rotor, and an external magnetic field is applied to the rotor. When the rotor permanent magnets are magnetized, the inner side of the permanent magnets conducts magnetism The passage makes it difficult for the magneti...

AI Technical Summary

Problems solved by technology

[0003] In the tangential permanent magnet motor of the prior art, since the permanent magnets of the rotor are radially arranged, a part of the permanent magnets is deeply buried inside the rotor, an external magnetic field is applied to the rotor, and when the permanent magnets of the rotor are magnetized, the inner side of the permanent magnets will The passage makes it difficult for the magnetizing magnetic field to enter the part of the rotor close to the rotating shaft, and the part of the permanent magnet near the rotating shaft cannot be magnetized to reach saturation, which will easily lead to a decrease in motor performance, or even loss of magnetization of the permanent magnet, and the motor cannot run

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