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External rotor brushless permanent magnet motor

A technology of brushless permanent and magneto motors, applied to synchronous motors with stationary armatures and rotating magnets, magnetic circuits, electrical components, etc. Large, small cogging torque improvement effect, etc., to achieve the effect of improving the back EMF harmonic content, optimizing coordination, improving vibration and running noise

Inactive Publication Date: 2017-02-08
SHANGHAI TOP MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of only relying on optimizing the shape of the permanent magnet poles on the rotor 31 side has a relatively small improvement effect on the cogging torque, and the improvement effect on the vibration and running noise of the motor is not obvious. Therefore, the traditional external rotor permanent magnet motor Loud vibration and running noise

Method used

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  • External rotor brushless permanent magnet motor
  • External rotor brushless permanent magnet motor
  • External rotor brushless permanent magnet motor

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Embodiment Construction

[0018] The embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention. All similar structures and similar changes of the present invention should be included in the scope of protection of the present invention. The commas in all indicate the relationship between and.

[0019] Such as figure 1 As shown, an outer rotor brushless permanent magnet motor provided by the first embodiment of the present invention includes a rotor 11 and a stator disposed inside the rotor 11. The inner wall of the rotor 11 is arranged with a plurality of permanent magnets at intervals along the circumferential direction. Magnetic poles 12, the permanent magnet poles 12 are formed with chamfered angles 121 on the left and right edges of the inner side (the inner side toward the stator), and a plurality of stator teeth 13 are formed on the stator, and each stator to...

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Abstract

The invention relates to an external rotor brushless permanent magnet motor and belongs to the motor technical field. The objective of the invention is to solve the technical problems of motor vibration and operating noises. The motor includes a rotor and a stator arranged in the rotor. The inner wall of the rotor is provided with a plurality of permanent magnetic poles at intervals along a circumferential direction. Chamfers are formed at the left edge portion and right edge portion of the inner side of each permanent magnetic pole. A plurality of stator teeth are formed on the stator. The stator teeth are distributed at intervals along the circumferential direction of the stator. The external rotor brushless permanent magnet motor is characterized in that a left stator auxiliary groove and a right stator auxiliary groove are formed in each stator tooth; and cut tooth tips are formed at the left edge portion and right edge portion of each stator tooth. According to the external rotor brushless permanent magnet motor provided by the invention, small vibration and operating noises are generated in the operation of the external rotor brushless permanent magnet motor.

Description

technical field [0001] The invention relates to motor technology, in particular to the technology of an outer rotor brushless permanent magnet motor. Background technique [0002] The brushless permanent magnet synchronous motor has the advantages of small size, high efficiency, simple structure, and strong manufacturability, among which the outer rotor permanent magnet motor has been widely used in fans and air conditioners. [0003] During the operation of the outer rotor permanent magnet motor, when the magnetic flux of the permanent magnet on the rotor side is coupled with the stator teeth, cogging torque will be generated due to the influence of cogging. And while generating effective torque, it will also generate radial electromagnetic force. These reasons will cause the motor to generate vibration and running noise during operation. [0004] Such as image 3 As shown, the traditional outer rotor permanent magnet motor is mainly composed of a rotor 31 and a stator ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/22H02K1/14
CPCH02K1/146H02K21/22H02K2213/03
Inventor 张国扬王凯张泽东
Owner SHANGHAI TOP MOTOR
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