Permanent magnet rotor and permanent magnet motor

Abstract

The invention discloses a permanent magnet rotor and a permanent magnet motor. The permanent magnet rotor comprises a rotor core and a rotating shaft positioned in middle of the rotor core, wherein multiple mounting grooves distributed in a radial direction of the rotor core are formed in the rotor core; a permanent magnet is mounted in each mounting groove; multiple flux-insulation grooves are formed in the regions, between the rotating shaft and the corresponding permanent magnets, of the rotor core; each flux-insulation groove is formed between two adjacent permanent magnets; and flue-insulation bridges are formed in the parts, between the corresponding flux-insulation grooves and the corresponding groove bottoms, close to the rotating shaft, of the adjacent mounting grooves, of the rotor core. The problems of degradation of motor performance, excitation loss of the permanent magnets and impossibility of motor operation caused by the reason that the parts, close to the rotating shaft, of the permanent magnets cannot be fully magnetized to reach a saturated state in the prior art are effectively solved by the permanent magnet rotor and the permanent magnet motor.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a permanent magnet rotor and a permanent magnet motor. Background technique [0002] The permanent magnet motor (tangentially magnetized permanent magnet structure) in the prior art can produce a higher air gap magnetic density due to the "magnetization" effect, so that the motor has a larger torque / current ratio and torque / volume In contrast, permanent magnet motors are increasingly used in servo systems, electric traction, office automation, household appliances and other occasions. [0003] However, in the prior art permanent magnet motor (tangentially magnetized permanent magnet structure), the permanent magnets of the permanent magnet rotor are radially arranged, and one end of the permanent magnet is close to the rotating shaft (one end is deeply buried inside the rotor), and an external magnetic field is applied to the rotor. In general, when magnetizing the permanent magn...

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Problems solved by technology

[0004] In the embodiment of the present invention, a permanent magnet rotor and a permanent magnet motor are provided to solve the problems in the prior art that the part of the permanent magnet close to the rotating shaft cannot be magnetized to a saturated state, resulting in a decrease in the performance of the motor, loss of magnetization of the permanent magnet and failure of the motor to operate. The problem

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