Motor rotors and permanent magnet motors

Abstract

The invention provides a motor rotor, and a permanent magnet motor. The motor rotor comprises a rotor core (1), wherein a plurality of permanent magnet grooves (2) are formed along the circumference of the rotor core (1); permanent magnets (3) are arranged in the permanent magnet grooves (2); a magnetic isolation groove (4) is formed on the inner side of each permanent magnet groove (2); arc-shaped walls are arranged on the two circumferential sides of each magnetic isolation groove (4); first magnetic isolation holes (5) are formed between every two adjacent magnetic isolation grooves (4); and an arc-shaped first magnetic isolation bridge (6) is formed between each first magnetic isolation hole (5) and the corresponding arc-shaped wall. The motor rotor provided by the invention has the advantages that magnetic isolation effects can be effectively improved, and magnetic leakage on the inner side of the motor rotor can be reduced, so that the magnetization saturation of the motor rotorcan be improved, and better motor performance can be achieved.

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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