Outer rotor permanent magnet synchronous motor having bearings fixed on enclosure

Abstract

The invention discloses an outer rotor permanent magnet synchronous motor having bearings fixed on an enclosure. The outer rotor permanent magnet synchronous motor having bearings fixed on an enclosure comprises a stator, a rotor arranged outside the stator, a magnet for generating a magnetic field, a front bearing, a rear bearing, the enclosure, a rotating shaft arranged in the center of the enclosure and having one end extending out of the enclosure, a front end cover for sealing the enclosure and a rear end cover for sealing the enclosure; an L-shaped connector extends inwards inside the enclosure; the front bearing and the rear bearing are positioned between the L-shaped connector and the rotating shaft and respectively arranged at two ends of the L-shaped connector. According to the outer rotor permanent magnet synchronous motor having the bearings fixed on the enclosure, the front bearing and the rear bearing are arranged on the L-shaped connector of the enclosure, so that the concentricity and the position degree of the bearings are improved, only the machining precision of the enclosure needs to be ensured, and other parts do not need severe machining precision; the assembly complexity of a product is effectively reduced, and the overall cost of the motor is lowered.

Description

technical field [0001] The invention relates to the field of electric motors and generators, in particular to an outer rotor permanent magnet synchronous motor with a bearing fixed on a casing which adopts a special structure to solve the influence of component assembly accuracy on motor operation. Background technique [0002] The outer rotor permanent magnet synchronous motor is used in many occasions, but because the outer rotor permanent magnet synchronous motor has more complex parts than the inner rotor permanent magnet synchronous motor, the accuracy is easy to reduce during the assembly process, causing the motor to run noise and affecting the operating life of the motor, etc. The problem is that many application fields cannot have the same application effect as the inner rotor motor. The position of the bearing in the permanent magnet synchronous external rotor motor structure is affected by the rotor structure and needs to be installed on one side of the rotor, not...

AI Technical Summary

Problems solved by technology

[0002] The outer rotor permanent magnet synchronous motor is used in many occasions, but because the outer rotor permanent magnet synchronous motor has more complex components than the inner rotor permanent magnet synchronous motor, the accuracy is easy to be reduced during the assembly process, resulting in motor running noise and affecting the operating life of the motor, etc. Problem, many application fields cannot have the same application effect as the inner rotor motor

The position of the bearing in the permanent magnet synchronous external rotor motor structure is affected by the rotor structure and needs to be installed on one side of the rotor, not on both sides of the rotor, so that the concentricity of the two bearings will affect the air gap between the rotor and the stator. If the bearing If the concentric line is not perpendicular to the mounting surface, it will also affect the stability of the torque output of the output shaft after the motor is installed, causing vibration and noise, and at the same time affecting the operating life of the motor

[0003] The current existing solution is to achieve the concentricity and position of the bearing installation through high machining accuracy of the casing, end cover, and bearing seat, and high assembly accuracy. However, this solution is costly and requires high assembly. Poor machining accuracy of any part will affect the operation of the entire motor

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