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Permanent magnet brushless DC motor

A technology of brushless motor and permanent magnet DC, which is applied in the direction of electrical components, electromechanical devices, electric components, etc., can solve the problems of high noise, high wind resistance, and poor wind guiding effect, and achieve the effect of small wind resistance and noise reduction

Inactive Publication Date: 2020-02-11
NINGBO FUJIA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The permanent magnet brushless DC motor generally includes an organic casing and a bracket. The rotor is arranged between the casing and the bracket. The casing generally includes a rotor seat, a fixing ring and a casing. A plurality of air guide ribs are arranged between the ring and the shell, but the air guide ribs in the prior art are all vertically arranged flat plates, so that the wind resistance is high, and the noise generated when the wind passes is also relatively large, which in turn leads to the less wind effect

Method used

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  • Permanent magnet brushless DC motor
  • Permanent magnet brushless DC motor
  • Permanent magnet brushless DC motor

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Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0027] Specific embodiment one, such as Figure 1-Figure 5 , a permanent magnet brushless DC motor, comprising a casing 1, a bracket 2, and a rotor 3 arranged between the casing 1 and the bracket 2, wherein:

[0028] The rotor 3 is an ordinary rotor, and bearings are arranged on both sides, which is a relatively conventional structure in the prior art, so it will not be expanded in detail here;

[0029] The casing 1 includes a rotor seat 4, a fixed ring 5 and a casing 6, a fastening rib 7 is provided between the rotor seat 4 and the fixed ring 5, and an air guide rib 8 is provided between the fixed ring 5 and the casing 6, wherein:

[0030] Because the rotor 3 is an ordinary rotor, the width of the rotor seat 4 can be small, so that the rotor seat 4 can be well fixed on the fixing ring 5 by using a set of three fastening ribs 7, and the three fastening ribs 7 are uniform It is arranged between the fixed ring 5 and the rotor seat 4;

[0031] Fixed ring 5, the diameter of the ...

specific Embodiment 2

[0035] Specific embodiment two, such as Figure 6 As shown, the difference with the specific embodiment one is that the wind guiding rib 8 in the specific embodiment two is divided into a first wind guiding rib and a second wind guiding rib, and the up and down height of the first wind guiding rib is greater than that of the second guiding rib The upper and lower heights of the wind ribs are high, and the first wind guide rib and the second wind guide rib are evenly spaced between the fixed ring 5 and the shell 6 .

specific Embodiment 3

[0036] Specific embodiment three, such as Figure 7-Figure 8 As shown, the difference from the first embodiment is that the rotor 3 used in the third embodiment is a rotor 3 with a cantilever bearing, and the rotor 3 with a cantilever bearing is as follows Figure 7 As shown, it includes a bearing sleeve, and there are two connected bearings inside, so the overall thickness is relatively large, and the thickness of the rotor seat 4 is required to be relatively large, so two sets of fastening ribs 7 are required to fix the rotor seat 4 to the fixed ring 5 Above, each set of fastening ribs 7 includes three fastening ribs 7, which are evenly arranged between the fixed ring 5 and the rotor seat 4, and the two sets of fastening ribs 7 are arranged staggered up and down at intervals.

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Abstract

The invention relates to the technical field of motors, in particular to a permanent magnet brushless DC motor. The motor comprises a casing (1), a support (2) and a rotor (3) arranged between the casing (1) and the support (2). The casing (1) comprises a rotor seat (4), a fixing ring (5) and a shell (6); a fastening rib (7) is arranged between the rotor seat (4) and the fixing ring (5); an air guide rib (8) is arranged between the fixing ring (5) and the shell (6); and the thicknesses of the upper end and the lower end of the air guide rib (8) is smaller than that of the middle of the air guide rib (8). The permanent magnet brushless DC motor is good in air guide effects.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a permanent magnet DC brushless motor. Background technique [0002] The small permanent magnet brushless DC motor has a compact structure and is widely used because of its high working efficiency and low noise, and it is widely used in almost every field of aerospace, national defense, industrial and agricultural production, and daily life. In daily life, it is often used in household appliances such as electric fans, hair dryers, and handheld vacuum cleaners. [0003] The permanent magnet brushless DC motor generally includes an organic casing and a bracket. The rotor is arranged between the casing and the bracket. The casing generally includes a rotor seat, a fixing ring and a casing. A plurality of air guide ribs are arranged between the ring and the shell, but the air guide ribs in the prior art are all vertically arranged flat plates, so that the wind resistance is high, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K5/04H02K5/20
CPCH02K5/04H02K5/20
Inventor 周洋
Owner NINGBO FUJIA IND