Embedded sine-profile permanent motor rotor

Abstract

The invention relates to an embedded sine-profile permanent motor rotor which solves the problem that permanent magnets in traditional motors in the prior art are generally attached to the outer sides of rotors and prone to shed in high-speed rotation of the rotors and the problem of vibration noise caused by instability in operation of the motors due to fluctuation in rotation of the rotors in normal shapes. A winding shaft on the surface of the rotor is provided with a plurality of arc protrusions in consecutive connection, the rotor is partitioned into a plurality of equal areas by the ligature of the rotor axis and the crosspoint of each two adjacent protrusions, two grooves in inverted splayed array are arranged in each area, and permanent magnets are inserted in the grooves. The embedded sine-profile permanent motor rotor has the advantages that the separation of the permanent magnets in high-speed rotation of the rotor is avoided, and reliability of the motor is improved while the service life of the motor is prolonged; salient pole rate is increased, larger salient pole torques can be generated, efficiency is improved, and the service life of the motor is prolonged; and the motor is more stable in operation, loss caused by harmonic waves is reduced, and vibration noise of the motor is improved to some extent.

Description

[0001] technical field [0002] The invention relates to the technical field of permanent magnet motors, in particular to a built-in sinusoidal surface permanent magnet motor rotor which ensures that the permanent magnets will not be separated when the rotor rotates at high speed and increases the reliability and life of the motor. Background technique [0003] The structure of a traditional motor rotor generally includes a rotor, and permanent magnets are placed on the surface of the rotor. This kind of surface-mounted permanent magnet is easy to fall off at high speed, which affects the reliability and life of the motor, and the speed-up effect is not obvious when the speed is increased by weakening the magnetic field. In addition, the surface of the rotor is generally circular or polygonal. The rotor of the structure has fluctuations during the rotation process, which makes the operation of the motor not stable enough, and there is also the problem of vibration and noise ...

AI Technical Summary

Problems solved by technology

[0004] The invention solves the problems in the prior art that the permanent magnets of traditional motors are generally placed on the outside of the rotor and are easy to fall off when the rotor rotates at a high speed, and that the rotor with a general shape fluctuates during rotation, making the motor run unstable and vibrating The problem of noise provides a built-in sinusoidal surface permanent magnet motor rotor that ensures that the permanent magnets will not disengage when the rotor rotates at high speed, increases the reliability and life of the motor, and makes the motor run more stably.

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