Permanent magnet synchronous motor rotor and permanent magnet motor

Abstract

The invention provides a permanent magnet synchronous motor rotor and a permanent magnet motor, the permanent magnet synchronous motor rotor comprises a rotor core and tangential permanent magnets, and the opposite sides of every two adjacent tangential permanent magnets have the same polarity; the tangential permanent magnet comprises a main permanent magnet and an auxiliary permanent magnet, the main permanent magnet is located on the radial outer side of the auxiliary permanent magnet, and the auxiliary permanent magnet inclines relative to the main permanent magnet, that is, the center line of the auxiliary permanent magnet and the center line of the main permanent magnet are not parallel and are not on the same straight line, and an included angle A is formed between the center lines of the two magnets; the included angle of the center lines of the two adjacent main permanent magnets is B, and A and B meet the following relation: A / B is greater than or equal to 0.06. According to the invention, the magnetic line angle of the auxiliary permanent magnet and the armature magnetic field can be increased, and the area of the auxiliary permanent magnet is increased in a limited space, so that the demagnetization rate of the auxiliary permanent magnet is reduced, the contact area of the auxiliary permanent magnet and the main permanent magnet is reduced, the demagnetization effect on the main permanent magnet is reduced, and the demagnetization resistance of the motor is improved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a permanent magnet synchronous motor rotor and a permanent magnet motor. Background technique [0002] Due to the "magnetization" effect, the motor with the permanent magnet tangentially magnetized structure can generate a higher air gap flux density than the permanent magnet radially magnetized motor, so that the motor has a larger torque / current ratio and torque / volume ratio. , more and more are used in servo systems, electric traction, office automation, household appliances and other occasions. [0003] Since the tangential permanent magnet motor in the prior art adopts a magnetic circuit structure with a single permanent magnet in parallel, the working point of the permanent magnet of the rotor is lower than that of the radial permanent magnet motor, which is easy to cause the motor efficiency to decrease, and there is a risk of demagnetization in harsh environments, so that ...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the permanent magnet motor in the prior art has poor anti-demagnetization ability, thereby providing a permanent magnet synchronous motor rotor and a permanent magnet motor

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