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 N permanent magnets, the permanent magnets are arranged on the rotor core and extend along the radial direction of the rotor core, and the opposite sides of every two adjacent permanent magnets have the same polarity; the permanent magnet is provided with a permanent magnet center line, the rotor comprises a plurality of magnetic poles, a magnetic pole boundary line is arranged between two adjacent magnetic poles, the permanent magnet center line of the permanent magnet and the nearest magnetic pole boundary line are obliquely arranged, an included angle A not equal to 0 exists between the permanent magnet center line of the permanent magnet and the nearest magnetic pole boundary line, the angle of each magnetic pole in the circumferential direction of the rotor iron core is B, and A and B meet the following relation that A / B is larger than or equal to 0.2. According to the invention, the effective magnetic flux area of the permanent magnet is increased in the limited space of the rotor, the flux linkage of the motor is improved, the torque of the motor is improved, the running current of the motor is reduced, the efficiency of the motor is improved, the demagnetization rate of the 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] Because the tangential permanent magnet motor in the prior art adopts the magnetic circuit structure of 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 tha...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of low motor flux linkage in the permanent magnet motor in the prior art, thereby providing a permanent magnet synchronous motor rotor and a permanent magnet motor

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