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Brushless dust collector motor noise-reduction device

A vacuum cleaner and noise reduction technology, which is applied in the field of brushless vacuum cleaner motor noise reduction devices, can solve the problems of reducing the working efficiency of the motor and loud noise, and achieves the effects of simple structure, noise reduction, and magnetic pull reduction

Active Publication Date: 2016-06-15
SUZHOU RUNHAO MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the stator and rotor move relative to each other, the two symmetrical stator teeth on the stator and the two corresponding rotor poles on the motor rotor will generate a large magnetic pull force, that is, the magnetic pull force at the coupling point is the largest, and the magnetic pull force will make the stator outer The circle produces mechanical deformation, which will be transmitted to the casing, causing huge noise, and at the same time reducing the working efficiency of the motor

Method used

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  • Brushless dust collector motor noise-reduction device
  • Brushless dust collector motor noise-reduction device
  • Brushless dust collector motor noise-reduction device

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Embodiment 1

[0035] In the first embodiment, by changing the structure of the stator teeth 12, the reluctance is increased, thereby reducing the magnetic density between the air gaps and the magnetic pull. Similarly, changing the structure of the motor rotor can also reduce the magnetic resistance between the air gaps. The magnetic density reduces the radial magnetic pull.

[0036] Image 6 Shown is the accompanying drawing of the second embodiment of the present invention, which increases the reluctance by changing the structure of the rotor 2 of the motor. The outer circular surface of the motor rotor 2 is a circular arc surface with a radius of R2. By setting the concave arc groove 25 on the outer surface of the motor rotor 2, the motor rotor 2 has a non-concentric structure, and the thickness of the rotor magnetic pole 21 in the radial direction is The maximum value is set on the center line of the rotor magnet 22 and gradually decreases toward both sides, so that the magnetic resista...

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PUM

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Abstract

The invention provides a brushless dust collector DC motor noise-reduction device, which comprises a motor rotor and a motor stator. The motor stator comprises a stator yoke portion and a stator tooth portion. The motor rotor comprises a rotation shaft and rotor magnetic poles arranged on the rotation shaft. The two sides of a center line of the stator tooth portion are provided with two symmetrical rectangular auxiliary slots or semicircular auxiliary slots respectively; the outer circle surface of the motor rotor is an arc surface, the radius of which is R2; the circle center of the arc surface is same with the shaft center of the rotation shaft; the outer surface of each rotor magnetic pole is an arc surface, the radius of which is R1; and the radius R1 of the outer arc surface of the rotor magnetic pole is larger than 0.7 R2 and smaller than 0.9 R2. The brushless dust collector motor noise-reduction device has the advantages of increasing magnetic resistance at the coupling place of the stator and the rotor, reducing gap flux density, reducing magnetic pull, reducing vibration and noise and improving work efficiency of a motor.

Description

technical field [0001] The invention relates to the technical field of motor noise reduction, in particular to a motor noise reduction device for a brushless vacuum cleaner. Background technique [0002] The existing brushless four-pole six-slot brushless DC motor stator on the stator teeth, the end structure of the stator teeth presents a concave arc surface structure, and the rotor magnetic end surface has an arc surface structure. A radial air gap is formed between the motor stator and the motor rotor. When the existing brushless DC motor is powered on, the magnetic force lines of the rotor magnet gather at the rotor magnetic poles, couple with the magnetic force lines generated by the stator winding, and the magnetic flux at the coupling point increases. The magnetic density is related to the area through which the magnetic flux passes. When the magnetic flux is constant, the smaller the area, the greater the magnetic density. And the magnetic pulling force is proporti...

Claims

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Application Information

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IPC IPC(8): H02K1/16H02K1/26H02K5/24
CPCH02K1/16H02K1/26H02K5/24
Inventor 尹凌飞
Owner SUZHOU RUNHAO MOTOR CO LTD