Motor rotor and permanent magnet motor

A technology for motor rotors and permanent magnets, applied in magnetic circuits, electrical components, electromechanical devices, etc., can solve problems such as motor performance degradation, motor inoperability, and permanent magnet loss of magnetism

CN108768025APending Publication Date: 2018-11-06ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-11-06

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Abstract

The invention provides a motor rotor and a permanent magnet motor. The motor rotor comprises a rotor iron core (1), multiple magnet slots (2) are arranged along the periphery of the rotor iron core (1), a permanent magnet (3) is arranged in the permanent magnet slot (2), a magnetic shield slot (4) is arranged at the inner side of the permanent magnet slot (2), the permanent magnet slot (4) extendstowards the adjacent magnetic shield slot (4) along the clockwise direction, and a magnetic shield bridge (6) forming a preset included angle with the magnetic pole center line is formed between themagnetic shield slot (4) and the adjacent magnetic shield slot (4); or the magnetic shield slot (4) extends towards the adjacent magnetic shield slot (4) along the counterclockwise direction, and themagnetic shield bridge (6) forming the preset included angle with the magnetic pole center line is formed between the magnetic shield slot (4) and the adjacent magnetic shield slot (4). According to the motor rotor provided by the invention, the magnetic shield effect can be effectively improved, the leakage flux at the inner side of the motor rotor is reduced, the magnetizing saturation of the motor rotor is improved, and the motor performance is improved.
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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...

Examples

Embodiment Construction

[0049] see in conjunction Figures 1 to 11 As shown, according to an embodiment of the present invention, the motor rotor includes a rotor iron core 1, and the rotor iron core 1 is provided with a plurality of permanent magnet slots 2 along the circumferential direction, and permanent magnets 3 are arranged in the permanent magnet slots 2, and the permanent magnet slots 2 The inner side is provided with a magnetic isolation slot 4, and the magnetic isolation slot 4 extends clockwise toward the adjacent magnetic isolation slot 4, and forms an isolation gap with the adjacent magnetic isolation slot 4 at a preset angle with the center line of the magnetic pole. The magnetic bridge 6; or, the magnetic isolation slot 4 extends in the counterclockwise direction toward the adjacent magnetic isolation slot 4, and forms a magnetic isolation bridge with a preset angle with the magnetic pole centerline between the adjacent magnetic isolation slot 4 6. Preferably, each permanent magnet s...