CN109936268A - Outer rotor brushless motor - Google Patents
Outer rotor brushless motor Download PDFInfo
- Publication number
- CN109936268A CN109936268A CN201910353126.XA CN201910353126A CN109936268A CN 109936268 A CN109936268 A CN 109936268A CN 201910353126 A CN201910353126 A CN 201910353126A CN 109936268 A CN109936268 A CN 109936268A
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- Prior art keywords
- teeth portion
- stator
- tooth
- magnetic slot
- outer rotor
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- 238000005520 cutting process Methods 0.000 claims description 17
- 210000000515 tooth Anatomy 0.000 abstract description 43
- 210000003781 tooth socket Anatomy 0.000 abstract description 8
- 238000004804 winding Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Abstract
The present invention relates to a kind of outer rotor brushless motors, it is characterized by comprising rotor and the stators being arranged in rotor, the inner wall of rotor has been uniformly arranged in the circumferential direction 28 magnetic shoes, the left and right ends of the inside of magnetic shoe are equipped with corner cut, stator is equipped with 9 stator tooths being circumferentially uniformly arranged, the tooth top center of each stator tooth is equipped with and cuts magnetic slot, it cuts magnetic slot and stator tooth is divided into symmetrical left teeth portion and right teeth portion, the air gap of left teeth portion becomes larger from the center line of left teeth portion to two sides, and the air gap of right teeth portion becomes larger from the center line of right teeth portion to two sides.The configuration of the present invention is simple is compact, the cooperation of slot number S=9,2P=28 of use, and the technical solution of magnetic slot is cut in the setting of the tooth top center of each stator tooth, solve due to number of stator teeth it is more and make tooth socket area reduce, cause enameled wire meticulous, in addition can not coiling the problem of, it is particularly suitable for the lesser outer rotor brushless motor of root diameter, realize low speed high torque, and runnability is steady, control precision is high.
Description
Technical field
The present invention relates to a kind of motors, more particularly, to a kind of outer rotor brushless motor.
Background technique
With the fast development of Internet of Things, the low noise that sorting system is proposed, rapid, intelligent, miniaturization etc.
It is required that currently, the motivation transfer motion part of conventional sorting system adds the structure of gear-box, such structure ratio using alternating current generator
It is cumbersome, the unfavorable factors such as gear noise is big and gear-box is easily damaged.Since outer rotor brushless motor has small in size, effect
The advantages that rate is high, structure is simple, manufacturing is strong, is more and more applied in sorting system.Current Domestic routine
Outer rotor brushless motor diameter is 67mm and 50mm, and number of stator slots S=12, number of poles 2P=8/10/14 etc. is since halved belt sorts
The brushless motor speed that system uses only has 800rpm, in order to realize low speed high torque, it is desirable to the number of poles of rotor is increased as far as possible,
And as rotor number of poles increases, motor performance is steady, and Hall feedback frequency signal improves, and control precision also mentions accordingly
It is high.It can be usually the every pole S=21/24/27/30/33/36/39(with the number of stator teeth of the concentratred winding of the perfect cooperation of number of poles 2P=28
Near every phase slot number q=1/3), but since motor length is long, diameter is smaller, and the number of teeth is more to bring tooth socket area mistake
It is small, and each tooth socket requires insulating layer, so that practical tooth socket area further reduces, causes enameled wire meticulous, even
It can not coiling.
Summary of the invention
The applicant is directed to above-mentioned problem, has carried out Improvement, provides a kind of outer rotor brushless motor, structure is simple
It is compact, solve due to number of stator teeth it is more and make tooth socket area reduce, cause enameled wire meticulous, in addition can not coiling the problem of,
It is particularly suitable for the lesser outer rotor brushless motor of root diameter, realizes low speed high torque, and runnability is steady, control essence
Degree is high.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that:
A kind of outer rotor brushless motor, including rotor and the stator being arranged in rotor, the inner wall of the rotor is circumferentially uniform
28 magnetic shoes are provided with, the left and right ends of the inside of the magnetic shoe are equipped with corner cut, what the stator was circumferentially uniformly arranged equipped with 9
Stator tooth, the tooth top center of each stator tooth, which is equipped with, cuts magnetic slot, and the stator tooth is divided into symmetrically by the magnetic slot that cuts
The air gap of left teeth portion and right teeth portion, the left teeth portion becomes larger from the center line of the left teeth portion to two sides, the right teeth portion
Air gap become larger from the center line of the right teeth portion to two sides.
It is further:
The width for cutting magnetic slot is between 0.25 ~ 0.33 times of the teeth portion width of the stator tooth, the depth for cutting magnetic slot
Between 0.2 ~ 0.28 times of the teeth portion width of the stator tooth.
The magnetic slot that cuts is V-arrangement.
For the V-arrangement angle for cutting magnetic slot between 40 ° ~ 50 °, the bottom of the V-shaped groove for cutting magnetic slot is fillet.
The magnetic slot that cuts is semicircle.
The diameter of the rotor is less than 80 millimeters.
The technical effects of the invention are that:
A kind of outer rotor brushless motor disclosed by the invention, simple and compact for structure, the cooperation of slot number S=9,2P=28 of use, and
In the tooth top center of each stator tooth, the technical solution of magnetic slot is cut in setting, solves to subtract tooth socket area since number of stator teeth is more
It is small, cause enameled wire meticulous, or even can not coiling the problem of, be particularly suitable for the lesser outer rotor brushless motor of root diameter,
Realize low speed high torque, and runnability is steady, control precision is high.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
As shown in Figure 1, the present invention includes rotor 1 and the stator being arranged in rotor 13, the inner wall of rotor 1 is circumferentially uniform
It is provided with 28 magnetic shoes 2, the left and right ends of the inside of magnetic shoe 2 are equipped with corner cut, and magnetic shoe 2 uses sintering rare-earth, pole embrace 0.85,
2 both ends of magnetic shoe are handled using top rake, so that Distribution of Magnetic Field sine reduces electric current to reduce harmonic wave, reduce temperature rise.Stator 3
Equipped with 9 stator tooths being circumferentially uniformly arranged 4, the tooth top center of each stator tooth 4, which is equipped with, cuts magnetic slot 41, cuts magnetic slot 41 for stator
Tooth 4 is divided into symmetrical left teeth portion 42 and right teeth portion 43, the air gap of left teeth portion 42 from the center line of left teeth portion 42 to two sides gradually
Become larger, the air gap of right teeth portion 43 becomes larger from the center line of right teeth portion 43 to two sides, that is to say, that left teeth portion 42 and right teeth portion
The air gap of 43 centerline is minimum, and the air gap at both ends is maximum, and the gap structure of such left teeth portion 42 and right teeth portion 43 can be with
The static torque of motor is reduced, motor operation stationarity is improved, reduces motor noise.The shape for cutting magnetic slot 41 can be V-arrangement, semicircle
Shape or other shapes play the role of cutting magnetic, and reduce teeth portion leakage field, increase air gap useful flux density.Magnetic is cut in order to increase
Effect, improve teeth portion intensity, reduce magnetic portion flux density, cut magnetic slot 41 width B control stator tooth 4 teeth portion width A 0.25 ~
Between 0.33 times, the depth C for cutting magnetic slot 41 is controlled between 0.2 ~ 0.28 times of the teeth portion width A of stator tooth 4, and cutting magnetic slot 41 is
V-arrangement angle F when V-arrangement is controlled between 40 ° ~ 50 °, and the bottom for cutting the V-shaped groove of magnetic slot 41 is fillet.In the present embodiment, it cuts
Magnetic slot 41 is V-arrangement, and the width B for cutting magnetic slot 41 is 0.28 times of teeth portion width A of stator tooth 4, and the depth C for cutting magnetic slot 41 is stator
0.22 times of the teeth portion A width of tooth, the V-arrangement angle F for cutting magnetic slot 41 is 46 °.
The cooperation of slot number S=9,2P=28 that use in the present invention, and magnetic is cut in setting in the tooth top center of each stator tooth
The technical solution of slot will lead to that motor can not start or motor output torque is very small if being not provided with cutting magnetic slot.This hair
The main case of bright technology is particularly suitable for outer rotor brushless motor of the diameter D less than 80 millimeters of rotor, since the number of teeth is reduced to 9
Stator tooth, tooth socket area is opposite to be expanded, and stator coil winding is convenient to be wound in the tooth socket between stator tooth, stator winding
Mode is reduced using conventional winding mode, such as double-deck concentratred winding, winding enamel-cover electric current per unit length, and mechanical characteristics of motor is hardened,
Motor temperature rise reduces, and realizes low speed high torque, and runnability is steady, and control precision is high, and stator tooth slot number is from the prior art
In teeth cellss become 9 teeth (magnetic slot is cut in setting), motor production efficiency greatly improves, and can meet mechanization production demand.
Claims (6)
1. a kind of outer rotor brushless motor, it is characterised in that: including rotor and the stator being arranged in rotor, the rotor it is interior
Wall has been uniformly arranged in the circumferential direction 28 magnetic shoes, and the left and right ends of the inside of the magnetic shoe are equipped with corner cut, and the stator was equipped with for 9 week
To the stator tooth being uniformly arranged, the tooth top center of each stator tooth, which is equipped with, cuts magnetic slot, and the magnetic slot that cuts is by the stator tooth
It is divided into symmetrical left teeth portion and right teeth portion, the air gap of the left teeth portion gradually becomes from the center line of the left teeth portion to two sides
Greatly, the air gap of the right teeth portion becomes larger from the center line of the right teeth portion to two sides.
2. outer rotor brushless motor described in accordance with the claim 1, it is characterised in that: the width for cutting magnetic slot is in the stator
Between 0.25 ~ 0.33 times of the teeth portion width of tooth, the depth for cutting magnetic slot the stator tooth teeth portion width 0.2 ~
Between 0.28 times.
3. outer rotor brushless motor according to claim 1 or 2, it is characterised in that: the magnetic slot that cuts is V-arrangement.
4. outer rotor brushless motor described in accordance with the claim 3, it is characterised in that: the V-arrangement angle for cutting magnetic slot 40 ° ~
Between 50 °, the bottom of the V-shaped groove for cutting magnetic slot is fillet.
5. outer rotor brushless motor according to claim 1 or 2, it is characterised in that: the magnetic slot that cuts is semicircle.
6. outer rotor brushless motor described in accordance with the claim 1, it is characterised in that: the diameter of the rotor is less than 80 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910353126.XA CN109936268A (en) | 2019-04-29 | 2019-04-29 | Outer rotor brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910353126.XA CN109936268A (en) | 2019-04-29 | 2019-04-29 | Outer rotor brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109936268A true CN109936268A (en) | 2019-06-25 |
Family
ID=66991155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910353126.XA Pending CN109936268A (en) | 2019-04-29 | 2019-04-29 | Outer rotor brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109936268A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101222153A (en) * | 2007-01-12 | 2008-07-16 | 台达电子工业股份有限公司 | Rotation structure of permanent magnet motor and method determining its rotation structure |
| JP2010172063A (en) * | 2009-01-20 | 2010-08-05 | Mitsuba Corp | Outer rotor brushless motor |
| CN202150780U (en) * | 2011-07-21 | 2012-02-22 | 江门市地尔汉宇电器股份有限公司 | Novel direct current brushless outer rotor motor |
| CN105071620A (en) * | 2015-08-26 | 2015-11-18 | 江苏大学 | Embedded permanent-magnet fault-tolerant type vernier motor having flux concentrator effect |
| CN105811724A (en) * | 2014-12-05 | 2016-07-27 | 财团法人工业技术研究院 | Outer rotor permanent magnet brushless motor |
| CN206099694U (en) * | 2016-09-26 | 2017-04-12 | 上海特波电机有限公司 | Brushless permanent -magnet machine of external rotor |
| CN108933511A (en) * | 2018-08-22 | 2018-12-04 | 哈尔滨理工大学 | Eccentric tooth-like permanent magnetism vernier motor |
| CN209608525U (en) * | 2019-04-29 | 2019-11-08 | 无锡市科迈电气有限公司 | Outer rotor brushless motor |
-
2019
- 2019-04-29 CN CN201910353126.XA patent/CN109936268A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101222153A (en) * | 2007-01-12 | 2008-07-16 | 台达电子工业股份有限公司 | Rotation structure of permanent magnet motor and method determining its rotation structure |
| JP2010172063A (en) * | 2009-01-20 | 2010-08-05 | Mitsuba Corp | Outer rotor brushless motor |
| CN202150780U (en) * | 2011-07-21 | 2012-02-22 | 江门市地尔汉宇电器股份有限公司 | Novel direct current brushless outer rotor motor |
| CN105811724A (en) * | 2014-12-05 | 2016-07-27 | 财团法人工业技术研究院 | Outer rotor permanent magnet brushless motor |
| CN105071620A (en) * | 2015-08-26 | 2015-11-18 | 江苏大学 | Embedded permanent-magnet fault-tolerant type vernier motor having flux concentrator effect |
| CN206099694U (en) * | 2016-09-26 | 2017-04-12 | 上海特波电机有限公司 | Brushless permanent -magnet machine of external rotor |
| CN108933511A (en) * | 2018-08-22 | 2018-12-04 | 哈尔滨理工大学 | Eccentric tooth-like permanent magnetism vernier motor |
| CN209608525U (en) * | 2019-04-29 | 2019-11-08 | 无锡市科迈电气有限公司 | Outer rotor brushless motor |
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