CN106374688B - For increasing the brush structure of the ripple current of motor - Google Patents
For increasing the brush structure of the ripple current of motor Download PDFInfo
- Publication number
- CN106374688B CN106374688B CN201610357178.0A CN201610357178A CN106374688B CN 106374688 B CN106374688 B CN 106374688B CN 201610357178 A CN201610357178 A CN 201610357178A CN 106374688 B CN106374688 B CN 106374688B
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- CN
- China
- Prior art keywords
- brush
- groove part
- ripple
- commutator
- ripple groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
- H02K13/006—Structural associations of commutators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
- H02K13/04—Connections between commutator segments and windings
Abstract
The present invention provides a kind of for increasing the brush structure of the ripple current of motor, is configured on commutator and slides, commutator includes the commutator segment for being configured to annular shape and being separated by slit.Brush structure includes: brush is divided into two pieces on the direction of rotation of commutator by the first ripple groove part and the second ripple groove part, the first ripple groove part and the second ripple groove part.Brush structure meets R2 > R1, and wherein R1 indicates the radius of curvature of commutator and the radius of curvature on the surface of R2 expression brush.It maintains to contact with the 2+2 piece of commutator segment while sliding on commutator segment by the brush that the first ripple groove part and the second ripple groove part are divided into two pieces.Therefore, ripple current pulse can steadily be generated.
Description
The cross reference of related application
Present application advocates Korea Spro 10-2015-0103009 submitted to Korean Intellectual Property Office on July 21st, 2015
The disclosure of the equity of state's patent application case, the application case is incorporated herein by reference in its entirety.
Technical field
One or more embodiment of the invention is related to the motor comprising brush, and more precisely, is related to for increasing
The brush structure of the ripple current of motor.
Background technique
In general, motor includes rotor and stator.Rotor includes commutator, and commutator is configured to and motor
Output shaft rotates together.Stator includes brush, and brush is configured to supply current to commutator.In general, commutator packet
Containing multiple for being separated from each other and being configured around the output shaft of motor.Brush supplies electric current while sliding on commutator segment
To commutator.
Ripple current can be used to control the rotation of the motor with above structure.In general, ripple current quilt
As for controlling the position or the electric signal of speed that serve as the motor of the actuator in vehicle, the motor is for example, straight
Galvanic electricity (direct current, DC) motor, skylight motor, seat motor or wiper motor.
With in the prior art use Hall sensor the case where compared with, the use of ripple current bring lower cost and
It does not need that additional sensor is installed.In addition, since ripple current has many pulses, it is possible to more specifically use
Ripple current controls motor.
The principle of ripple current generation will now be described.As shown in fig. 1, when the rotor of motor by brush 1 by being supplied
When should arrive the electric current driving of commutator 2, brush 1 is mobile between commutator segment 3 to pass through slit 4, and therefore brush 1 and commutator segment
Contact resistance between 3 changes, and causes the generation of ripple current.
Contact conditions cause the contact resistance between commutator 2 and brush 1 to change, and therefore as in Fig. 1 to Fig. 3
It is illustrated the generation of ripple current to be categorized into three kinds.Three bow strips are described referring now to example shown in Fig. 1
Part, two of them brush 1 are installed relative to eight pieces 3 of commutator 2.Fig. 1 illustrates that two brushes 1 correspond respectively to two (1
+ 1) contact conditions of a commutator segment 3.Fig. 2 illustrates that two brushes 1 correspond to another contact conditions of a commutator segment 3 of three (1+2).
Fig. 3 illustrates that two brushes 1 correspond to another contact conditions of a commutator segment 3 of four (2+2).In contact conditions shown in Fig. 1,
Contact resistance is the R=2Ri reduced from 1/R=1/ (4Ri)+1/ (4Ri).In the equations, R refers to two brushes 1 and commutator 2
Between total contact resistance (combined resistance), and Ri refers to the resistance of the rotator coil corresponding to a commutator segment 3.Separately
Outside, 4Ri refers to the combined resistance of the rotator coil separated by four slits 4 being located between two brushes 1.Namely
It says, forms parallel circuit by multiple commutator segments 3 between two brushes 1.
In contact conditions shown in Fig. 2, contact resistance is the R=(7/ reduced from 1/R=1/ (3Ri)+1/ (4Ri)
12) Ri=1.71Ri.In contact conditions shown in fig. 3, contact resistance is the R reduced from 1/R=1/ (3Ri)+1/ (3Ri)
=(2/3) Ri=1.5Ri.That is, can be between the range of 1.5Ri to 2.0Ri (25%) according to contact conditions contact resistance
It is interior.
Theoretically, ripple current is increased or reduced according to the resistance difference between piece contact conditions.In the above-described example, may be used
To predict that the level of the ripple current when a commutator segment 3 of four (2+2) contacts brush 1 increases.
For example, No. 0968923 Korean Patent Publication is a kind of for the ripple current of motor to be used as signal
To control the brush structure of motor.
However, when using disclosed brush structure, due to being begun around after commutator frictionally slides in brush
About 1000 periods in for example, by between commutator and the fine surface of brush roughness mismatch etc. factors cause
Noise excessive generation, user or operator may be dissatisfied.In addition, be used for multiple times disclosed brush structure it
Afterwards, it may disappear due to wearing the ripple groove being formed in brush, and the effect for therefore increasing ripple current may also disappear
It loses.Further, since the initial contact area between commutator and brush is relatively large, so the maximum value of ripple current is relatively
It is low, and therefore in order to expand ripple current, additional circuit is necessary.
Summary of the invention
One or more embodiments include for increasing the ripple current of motor, reduction initial friction noise and guaranteeing
The brush structure of the generation of stabilization ripple current even after circulation of long operating time perhaps multioperation.
Other aspects will be partly set forth in the following description, and partly will be apparent from the description, or
Person can be by practicing acquistion to the embodiment proposed.
According to one or more embodiments, provide it is a kind of for increasing the brush structure of the ripple current of motor, it is described
Brush structure is configured to contact with commutator and slide on commutator, the commutator include be configured to annular shape and
The commutator segment separated by multiple slits, the brush structure includes:
First ripple groove part configures in the surface of the brush towards commutator segment and on the length direction of brush
It is recessed；And
Second ripple groove part extends on the direction far from commutator segment from the first ripple groove part, the second ripple
Groove part and the first ripple groove part are narrow to form stepped construction,
Wherein brush is divided into the direction of rotation of commutator by the first ripple groove part and the second ripple groove part
On two pieces, and
Brush structure meets the following conditions:
R2 > R1:
L < W2 < 0.5B:
And
X < Y < 0.5BL,
Wherein
L indicates the width of each slit between commutator segment,
R1 indicates the radius of curvature of commutator,
R2 indicates the radius of curvature on the surface of the brush contacted with commutator segment,
B indicates the width of brush,
BL indicates the length of brush,
W1 indicates the width of the first ripple groove part,
W2 indicates the width of the second ripple groove part,
X indicates the depth of the first ripple groove part, and
Y indicates the summation of the depth of the first ripple groove part and the second ripple groove part.
W1 can meet W2 < W1 < B.
Detailed description of the invention
By the description to embodiment carried out below in conjunction with attached drawing, these and/or other aspects be will become obvious
And be more easier to understand, in the drawing:
Fig. 1 to Fig. 3 is the view for the condition for illustrating that wherein ripple current is generated by the motor of the prior art.
Fig. 4 is the view for illustrating the brush structure according to one embodiment.
Fig. 5 is the view for illustrating the configuration of brush and commutator depicted in figure 4.
Fig. 6 is the curve graph of the pulse of the ripple current of motor of the explanation comprising brush depicted in figure 4.
Specific embodiment
Now with detailed reference to embodiment, the example of the embodiment illustrates in the accompanying drawings, wherein identical in the text
Reference label refer to identical element.In this regard, the present embodiment can have different form and should not be construed and is limited
The description illustrated in this article.Therefore, these embodiments are described below solely by reference to attached drawing to illustrate this specification
Various aspects.As used herein, term "and/or" include any of one or more of associated listed item and
All combinations.
Hereinafter, embodiment will be described with reference to the drawings.
Fig. 4 is the view for illustrating the brush structure according to one embodiment.Fig. 5 is to illustrate brush 30 depicted in figure 4
With the view of the configuration of commutator 20.Fig. 6 is the arteries and veins of the ripple current of motor of the explanation comprising brush 30 depicted in figure 4
The curve graph of punching.
With reference to Fig. 4 to 6, the brush structure of embodiment is used to increase the ripple current of motor.Brush with brush structure
Son 30 slidably contacts with commutator 20, and commutator 20 includes to be configured to annular shape and separated by multiple slits 25
Commutator segment 22.
Commutator 20 is the part for constituting motor rotor.As described above, commutator 20 includes to be configured to annular shape
And the commutator segment 22 separated by multiple slits 25.The separation of slit 25 corresponds to the rotor coil (not shown) of commutator segment 22.
Commutator segment 22 is electrically connected respectively to the rotor coil separated by slit 25.
Brush 30 is towards commutator segment 22.Brush 30 contacts commutator segment 22 and can slide on commutator segment 22.That is,
With the rotation of commutator segment 22, brush 30 successively contacts commutator segment 22.For example, brush 30 can be slidably mounted on brush
In subshell (not shown).Brush 30 can be pushed by elastomeric element (not shown) towards commutator segment 22.It can provide multiple
Brush 30.For example, a pair of of brush 30 can be provided, and in this case, brush 30 can be configured to be therebetween
180.Angle.External power supply can supply current to commutator segment 22 by brush 30.
Brush 30 includes the first ripple groove part 32 and the second ripple groove part 34.
First ripple groove part 32 is configured in the surface of the brush 30 towards commutator segment 22.For example, first
Ripple groove part 32 can be recessed on the length direction of brush 30.
Second ripple groove part 34 extends on the direction far from commutator segment 22 from the first ripple groove part 32.
Second ripple groove part 34 and the first ripple groove part 32 are narrow.Therefore, in the section of brush 30,
First ripple groove part 32 and the second ripple groove part 34 can form stepped construction.
Brush 30 is divided into the rotation in commutator 20 by the first ripple groove part 32 and the second ripple groove part 34
Two pieces on direction.
It is being changed by the brush 30 that the first ripple groove part 32 and the second ripple groove part 34 are divided into two pieces
It maintains to contact with the 2+2 piece of commutator segment 22 while sliding on piece 22.Therefore, ripple current pulse can steadily be generated.
In addition, in initially assembling brush 30 and commutator 20, since the first ripple groove part 32 and the second ripple are recessed
Contact area between the reason brush 30 and commutator 20 of slot part 34 may be smaller, and therefore can reduce by commutator
Noise caused by mismatch between 20 curvature and the curvature of brush 30.In addition, initially being assembled in brush 30 and commutator 20
With operation when, the first ripple groove part 32 facilitate sharply and the ripple current pulse of peak value generation.
The size of the first ripple groove part 32 and the second ripple groove part 34 will now be described.
L indicates the width of each slit 25 between commutator segment 22.
The radius of curvature of R1 expression commutator 20.
R2 indicates the radius of curvature on the surface of the brush 30 contacted with commutator segment 22.
According to embodiment, 30 size setting of brush makes R2 be greater than R1 (R2 > R1).If R2 is less than R1, work as brush
Frictional noise may be excessively generated when son 30 and the initially assembling of commutator 20 and operation.
The width of B expression brush 30.
The length of BL expression brush 30.
L, R1, R2, B and BL are constants.That is, when commutator 20 and brush 30 are designed to motor,
Such value can be taken as constant.
W1 indicates the width of the first ripple groove part 32.
W2 indicates the width of the second ripple groove part 34.
X indicates the depth of the first ripple groove part 32.
Y indicates the summation of the depth of the first ripple groove part 32 and the depth of the second ripple groove part 34.
It is stable if W1, W2, X and Y are in particular range related with L, R1, R2, B and BL in above-mentioned value
And high ripple current can be generated by the motor comprising brush 30.
Firstly, W2 can meet L < W2 < 0.5B.If W2 is equal to or less than L, when by the first ripple groove part 32
The piece of the brush 30 of division may be unable to maintain that 2+2 piece contact when sliding on commutator segment 22, and therefore possibly can not be steady
Surely ripple current is generated.On the other hand, if W2 is greater than 0.5B, brush 30 may have poor durability, and
Therefore when using brush 30, brush 30 may be damaged.
In addition, W1 can meet W2 < W1 < B.
If W1 is equal to or less than W2, the first ripple groove part 32 and the second ripple groove part 34 are not formed
Stepped construction or the stepped construction for forming reversion.That is, dual groove structure can not be formed.In embodiment, such as
The first ripple of fruit groove part 32 and the second ripple groove part 34 do not form stepped construction, it would be possible that can not obtain
State effect.
On the other hand, if W1 is equal to or more than B, geometrically it is not likely to form the first ripple groove part 32.
X can meet following formula (1):
Y can meet X < Y < 0.5BL.
In formula (1), because of R2 > R1, X is always greater than 0.
If Y is equal to or less than X, the first ripple groove part 32 and the second ripple groove part 34 are not formed.Separately
Outside, if Y is equal to or more than 0.5BL, the first ripple groove part 32 and the second ripple groove part 34 may be too deep.Cause
This, brush 30 may have poor durability, and when in use, and brush 30 may be damaged.
When the first ripple groove part 32 and the second ripple groove part 34 meet comprising determining commutator 20 and brush 30
Some or all of the above-mentioned condition of fixed value of shape when, can produce the ripple current for being suitable for controlling motor.?
That is brush structure according to the embodiment, dual groove structure is (that is, the first ripple groove part 32 and the second line
Wave groove part 34) it is formed in the surface of contact commutator 20 of brush 30, and therefore brush 30 can have biplate contact
Structure.Therefore, compared with the brush structure of the prior art, 2+2 piece can be formed and contact and it is made to maintain relatively long time, and
And therefore the initial ripple current of motor can be it is stable.So that it takes up a position, for example, vehicle can be assigned security function to
Motorized window motor is without using the attachment device such as toroidal magnet or Hall sensor.That is, there are two tools
The motor of power pins can have security function without toroidal magnet and Hall sensor, and therefore motor may be
It is lighter and cheap and even still can produce stable ripple after longer period operating time or operation circulation
Electric current.
First ripple groove part 32 has the effect for the generation for inducing uniform and stable ripple current pulse.Also
It is to say, when 20 initial manipulation after assembling of brush 30 and commutator, since the reason of the first ripple groove part 32 can be with
Generate the ripple current pulse for being similar to sinusoidal impulse.
Fig. 6 illustrates stable and increase the ripple current pulse of the motor of the brush structure with embodiment.
As described above, according to one or more of above embodiments, it is configured to the embodiment of contact commutator 20
Brush structure increase the generation of the stabilization ripple current in motor and reduce just begin gimp simultaneously.Therefore, can make
Motor is controlled with the ripple current pulse generated by motor.
It should be understood that embodiment described herein should only consider in descriptive sense, rather than for purposes of limitation.
The description of features or aspect in each embodiment is usually considered as can be used for other other similar spies applied in example
Sign or aspect.
Although one or more embodiments have been described with reference to the drawings, one of ordinary skill in the art should be understood that can
In the case where not departing from the spirit and scope for the concept of the invention that the appended claims are defined to embodiment in form and thin
Various changes are carried out on section.
Claims (2)
1. a kind of for increasing the brush structure of the ripple current of motor, the brush structure is configured to contact commutator simultaneously
And slided on the commutator, the commutator includes to be configured to annular shape and separated by multiple slits multiple
Commutator segment, the brush structure include:
With backwards to the bottom surface of the commutator segment, the surface is provided with downwards the first ripple concave part on surface towards the commutator segment
Point, and the bottom surface of the first ripple groove part is provided with downwards the second ripple groove part, the second ripple groove part
Bottom surface and the distance between the surface the first ripple groove part bottom surface and the distance between the surface more
Far, the second ripple groove part and the first ripple groove part are narrow to form stepped construction,
Wherein brush is divided into the commutator by the first ripple groove part and the second ripple groove part
Direction of rotation on two pieces, and
The brush structure meets the following conditions:
R2>R1；
L<W2<0.5B；
And
X < Y < 0.5BL,
Wherein
L each of indicates between the commutator segment width of the slit,
R1 indicates the radius of curvature of the commutator,
R2 indicates the radius of curvature on the surface of the brush contacted with the commutator segment,
B indicates the width of the bottom surface of the brush,
BL indicate the surface of the brush to the maximum distance of the bottom surface,
W1 indicates the width of the first ripple groove part,
W2 indicates the width of the second ripple groove part,
X indicates the depth of the first ripple groove part, and
Y indicates the highest point on the surface to the vertical range summation of the bottom surface of the second ripple groove part.
2. it is according to claim 1 for increase motor ripple current brush structure, wherein W1 meet W2 < W1 <
B。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2015-0103009 | 2015-07-21 | ||
| KR1020150103009A KR101568665B1 (en) | 2015-07-21 | 2015-07-21 | Brush structure for increasing ripple current of motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106374688A CN106374688A (en) | 2017-02-01 |
| CN106374688B true CN106374688B (en) | 2019-06-04 |
Family
ID=54610101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610357178.0A Active CN106374688B (en) | 2015-07-21 | 2016-05-26 | For increasing the brush structure of the ripple current of motor |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR101568665B1 (en) |
| CN (1) | CN106374688B (en) |
| DE (1) | DE102016208702B4 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102510163B1 (en) | 2015-12-01 | 2023-03-15 | 엘지이노텍 주식회사 | Motor |
| CN108457551A (en) * | 2017-02-20 | 2018-08-28 | 联合汽车电子有限公司 | Window locations detection circuit |
| CN115997339A (en) * | 2020-09-01 | 2023-04-21 | 松下知识产权经营株式会社 | Motor with a motor housing having a motor housing with a motor housing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951078A (en) * | 2010-09-15 | 2011-01-19 | 温州超航机电有限公司 | Brush structure of motor with even number of commutators |
| EP2600503A1 (en) * | 2011-12-02 | 2013-06-05 | Maxon Motor AG | Brush support for a brush commuted electric motor and electric motor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4438868C2 (en) * | 1994-11-03 | 2002-01-24 | Bosch Gmbh Robert | Carbon brush for a DC motor |
| JP4583865B2 (en) | 2004-10-08 | 2010-11-17 | 日本電産サーボ株式会社 | Brush structure of small DC motor |
| JP2009131120A (en) * | 2007-11-27 | 2009-06-11 | Asmo Co Ltd | Brush and rotating electric machine |
| KR100968923B1 (en) * | 2009-11-19 | 2010-07-14 | 동양기전 주식회사 | Motor provided with brush structure enhancing ripple current |
| MX2015007085A (en) | 2012-12-06 | 2016-01-12 | Matinas Biopharma Inc | Omega-3 pentaenoic acid compositions and methods of use. |
-
2015
- 2015-07-21 KR KR1020150103009A patent/KR101568665B1/en active IP Right Grant
-
2016
- 2016-05-20 DE DE102016208702.9A patent/DE102016208702B4/en active Active
- 2016-05-26 CN CN201610357178.0A patent/CN106374688B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951078A (en) * | 2010-09-15 | 2011-01-19 | 温州超航机电有限公司 | Brush structure of motor with even number of commutators |
| EP2600503A1 (en) * | 2011-12-02 | 2013-06-05 | Maxon Motor AG | Brush support for a brush commuted electric motor and electric motor |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102016208702B4 (en) | 2021-03-04 |
| CN106374688A (en) | 2017-02-01 |
| DE102016208702A1 (en) | 2017-01-26 |
| KR101568665B1 (en) | 2015-11-12 |
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