CN206619776U - Commutator and direct current generator - Google Patents
Commutator and direct current generator Download PDFInfo
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- CN206619776U CN206619776U CN201720320083.1U CN201720320083U CN206619776U CN 206619776 U CN206619776 U CN 206619776U CN 201720320083 U CN201720320083 U CN 201720320083U CN 206619776 U CN206619776 U CN 206619776U
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- commutator
- filling part
- insulation filling
- brush
- insulating body
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Abstract
The utility model discloses a kind of commutator and direct current generator, wherein, the commutator includes brush and commutative ring, and the commutative ring includes：Insulating body, annularly；Multiple commutator segments, are arranged at intervals along the outer peripheral face of the insulating body, separation trough are formed between commutator segment described in arbitrary neighborhood two；And insulation filling part, in the separation trough, and the side surface back to the insulating body of the insulation filling part and the outer surface rounding off of the adjacent commutator segment.Technical solutions of the utility model inhibit the generation of commutation spark and commutation noise, improve the service life of brush；Direct current generator is reduced simultaneously and produces the harmful effect that electromagnetic interference (EMC) is produced to the wireless device of surrounding, is effectively improved the service behaviour of direct current generator.
Description
Technical field
The utility model is related to machine field, more particularly to a kind of commutator and direct current generator.
Background technology
Commutator is one of critical component of direct current generator, and its effect is to allow motor persistently to rotate down.At present, direct current
In the commutator used in machine between adjacent commutator segment in order to keep insulation, generally using be arranged at intervals, adjacent commutator segment it
Between form slot structure.However, the commutator with slot structure commutation when produce it is numerous bad, such as commutation spark, commutation noise,
The Fast Wearing of carbon brush and commutator, the service life for directly resulting in motor declines and destroyed the good experience of client, while
The efficiency of motor is reduced, increases energy consumption, commutation spark can also directly produce electromagnetic interference (EMC) and the radio of surrounding is set
It is standby to produce harmful effect, and the high frequency electric that produces of commutation spark be transmitted to by motor wiring among circuit make whole circuit by
To influence, it is restricted the use occasion of motor.
Utility model content
Main purpose of the present utility model is to propose a kind of commutator, it is intended to eliminates slot structure in commutator and is produced in commutation
Raw numerous defects, to improve the service behaviour of direct current generator.
To achieve the above object, the utility model proposes commutator, for direct current generator, the commutator includes：Including
Brush and commutative ring, the commutative ring include：
Insulating body, annularly；
Multiple commutator segments, are arranged at intervals along the outer peripheral face of the insulating body, between commutator segment described in arbitrary neighborhood two
It is formed with separation trough；And
Insulation filling part, in the separation trough, and the side table back to the insulating body of the insulation filling part
Face and the outer surface rounding off of the adjacent commutator segment.
Preferably, the insulation filling part is located at the position of the separation trough correspondence brush.
Preferably, the insulation filling part completely fills in the separation trough.
Preferably, the side surface back to the insulating body of the insulation filling part is in convex globoidal, and the convex globoidal
Extended surface overlapped with the outer surface of the adjacent commutator segment.
Preferably, the insulation filling part is as made by soft mica.
Preferably, the insulation filling part is located at the separation trough by the way of injection molding.
Preferably, the side back to the insulating body of the insulation filling part is provided with lubricating layer.
Preferably, the lubricating layer is as made by silicone grease.
Preferably, the insulation filling part is provided with damping layer back to the side of the insulating body.
The utility model also proposes a kind of direct current generator, and the direct current generator includes commutator, and the commutator includes：Including
Brush and commutative ring, the commutative ring include：
Insulating body, annularly；
Multiple commutator segments, are arranged at intervals along the outer peripheral face of the insulating body, between commutator segment described in arbitrary neighborhood two
It is formed with separation trough；And
Insulation filling part, in the separation trough, and the side table back to the insulating body of the insulation filling part
Face and the outer surface rounding off of the adjacent commutator segment.
Technical solutions of the utility model in the separation trough of commutative ring by using setting insulation filling part, and insulation filling
Part is back to a side surface of insulating body and the outer surface rounding off of adjacent commutator segment, in this way, commutation ring surface is complete
Round and smooth occluding surface, when brush is slidably contacted the surfaces with commutative ring, brush is abutted with commutation ring surface all the time, and then is inhibited
The generation of commutation spark and commutation noise, while reducing the abrasion between brush and commutative ring, improves the use longevity of brush
Life；Meanwhile, this commutator reduces the probability that commutation spark is produced in commutation, and then reduces direct current generator generation electromagnetic interference
(EMC) harmful effect produced to the wireless device of surrounding, it is to avoid the high frequency electric that commutation spark is produced passes through motor wiring
Being transmitted among circuit makes whole circuit be affected, and is effectively improved the service behaviour of direct current generator and extends direct current
The use occasion of motor, makes the competitiveness of product in market be significantly improved.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to the structure shown in these accompanying drawings.
Fig. 1 is the structural representation of the embodiment of the utility model commutator one；
Fig. 2 is the part explosive view of commutator in Fig. 1；
Fig. 3 is the structural representation of an embodiment of insulation filling part in Fig. 2；
Fig. 4 is the structural representation of another embodiment of insulation filling part in Fig. 2.
Drawing reference numeral explanation：
| Label | Title | Label | Title |
| 10 | Commutator | 130 | Insulation filling part |
| 100 | Commutative ring | 131 | Lubricating layer |
| 110 | Insulating body | 132 | Damping layer |
| 111 | Axis hole | 140 | Separation trough |
| 120 | Commutator segment |
Realization, functional characteristics and the advantage of the utility model purpose will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present utility model, rather than all
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of the utility model protection.
If it is to be appreciated that related in the utility model embodiment directionality indicate (such as upper and lower, left and right, it is preceding,
Afterwards ...), then directionality indicates to be only used for explaining relative between each part under a certain particular pose (as shown in drawings)
Position relationship, motion conditions etc., if the particular pose changes, directionality indicates also correspondingly therewith to change.
If, should " first ", " the in addition, relate to the description of " first ", " second " etc. in the utility model embodiment
Two " etc. description is only used for describing purpose, and it is not intended that indicating or implying its relative importance or implicit indicate meaning
The quantity of the technical characteristic shown.Thus, " first " is defined, the feature of " second " can express or implicitly include at least one
Individual this feature.In addition, the technical scheme between each embodiment can be combined with each other, but must be with ordinary skill
Personnel can be implemented as basis, when the combination appearance of technical scheme is conflicting or can not realize it will be understood that this technical side
The combination of case is not present, also not within the protection domain of the utility model requirement.
The utility model proposes a kind of commutator, it is adaptable to direct current generator.
In the embodiment of the utility model one, reference picture 1, the commutator 10 includes brush and commutative ring 100, the commutation
Ring 100 includes：
Insulating body 110, annularly；
Multiple commutator segments 120, are arranged at intervals along the outer peripheral face of the insulating body 110, are being commutated described in arbitrary neighborhood two
Separation trough 140 is formed between piece 120.
Usually, commutative ring 100 and rotor are arranged on machine shaft, and brush is fixed on the housing of motor, commutation
Ring 100 has multiple commutator segments 120, and the commutator segment 120 electrically connects with the rotor windings of motor, in order to avoid commutator segment 120 and
Be powered conducting between machine shaft, insulating body 110 is provided between commutator segment 120 and machine shaft, 110 sets of the insulating body
On machine shaft, on the one hand machine shaft is insulated with commutator segment 120, on the other hand there is support to make commutator segment 120
With so that outer peripheral face of the multiple commutator segments 120 along insulating body 110 is uniformly arranged.Wherein, each commutator segment 120 along insulation this
Interval forms separation trough 140 between the axis extension of body 110, the commutator segment 120 of arbitrary neighborhood two.In direct current generator, with direct current
Exemplified by motor, when brush, which is abutted, to be abutted with the surface of commutator segment 120, then turn that brush connects the commutator segment 120 correspondence
Sub- winding conducting, makes rotor be rotated under magnetic fields, then commutative ring 100 is also rotated with rotor, and when rotor turns to magnetic field
Dead-center position when, brush abuts connection with next commutator segment 120, that is, causes the conducting of next rotor windings, then drive rotor
It is rotated further, so repeats, then realize the rotation of dc motor.
, it is necessary to which the commutation of commutator 10, can just be such that machine shaft persistently turns in the rotation process of above-mentioned dc motor
Dynamic, now, the surface of brush and commutative ring 100 is sliding contact.Due to there is separation trough between adjacent commutator segment 120
140, when machine shaft is rotated, there are problems that commutation spark, commutation, and brush are constantly slipped into and/or skidded off
Separation trough 140, also exacerbates the abrasion of brush and commutator 10, and the service life for directly resulting in motor declines.Meanwhile, commutation fire
Flower can also directly produce electromagnetic interference (EMC) and produce harmful effect, and the height that commutation spark is produced to the wireless device of surrounding
Frequency electric current is transmitted among circuit by motor wiring makes whole circuit be affected, and the use occasion of motor is received limit
System.
Cause electromagnetic interference (EMC) harm to reduce commutation spark, be typically electric using being contacted with brush at this stage
Feel between brush and casing and even the mode of electric capacity carrys out the influence of suppression electromagnetic interference and high frequency electric to surrounding environment, in this way,
Add the manufacturing cost of direct current generator.In direct current generator, the conducting block that brush is made up of graphite or metallic graphite carbon, also by
Referred to as carbon brush.In order to reduce commutation spark, the method generally used at this stage is increase commutating pole and reversed to mobile carbon brush
Certain angle, has used commutating pole to add the costs of motor more the former, although seldom increase commutating pole makes electricity to the latter
Effective output torque reduction of machine, motor is with the abrasion of carbon brush during service firing, and the carbon dust worn and torn made holds
Easily it is stacked into groove and causes the short circuit between commutator segment 120, and then causes commutation spark is further increased even to form ring fire,
Abrasion between brush and commutator segment 120 further add it is sharp, while so that short circuit occurs between adjacent commutator segment 120, and then making rotor
Short circuit in winding, now rotor windings temperature rise, will even cause direct current generator to burn when serious.
Based on said circumstances, in order to reduce the commutation spark of the generation of commutator 10 and the mill of reduction brush and commutator 10
Damage, in the utility model embodiment, reference picture 2, using insulation filling part 130 by any two adjacent 120 shapes of commutator segment
Into separation trough 140 be filled, and the insulation filling part 130 back to the side surface of insulating body 110 and arbitrary neighborhood
The outer surface rounding off of commutator segment 120 described in two.Now, no longer there is the disconnected of the formation of separation trough 140 in the surface of commutative ring 100
Face, but round and smooth excessive complete closure curved surface, in brush and when slidably contacting the surfaces of commutative ring 100, brush is from commutator segment
120 when sliding into insulation filling part 130, and the transition of brush is more steady, and surface of the brush all the time with commutative ring 100 is abutted, and is entered
And the probability that commutation spark and commutation noise are produced is reduced, slidably contacted the surfaces while also reducing brush with commutative ring 100
When the degree of wear, be conducive to improve brush service life.
In the present embodiment, realize the side surface back to insulating body 110 of insulation filling part 130 with it is adjacent described in change
Mode to the outer surface rounding off of piece 120 has a variety of, wherein, it is in arcuation, insulation filling that the surface of commutator segment 120, which is typically,
The surface of part 130 may also be cambered surface, and the extended surface of the cambered surface is overlapped with the cambered surface of commutator segment 120, and now two cambered surfaces are spelled
Connect and be merged into a cambered surface；The surface that can also be insulation filling part 130 is only being in circle with the intersection on the surface of commutator segment 120
Degree of slipping over, is not especially limited herein.
It is understood that when being not provided with insulation filling part 130 in separation trough 140, being between adjacent commutator segment 120
, there is the possibility for occurring arc phenomenon in air insulation, this is also one of the reason for causing commutation spark.For when in separation trough 140
When being provided with insulation filling part 130, the insulating properties between adjacent commutator segment 120 is further enhanced, and then decreases
The probability that commutation spark is produced.
What deserves to be explained is, separation trough 140 is filled using insulation filling part 130, commutator 10 is reduced and is changing
To when the probability that produces of commutation spark, decrease direct current generator and produce electromagnetic interference (EMC) and the wireless device of surrounding is produced
Raw harmful effect, it is to avoid commutation spark produce high frequency electric be transmitted to by motor wiring among circuit make whole circuit by
To influence, and then it is effectively improved the service behaviour of direct current generator and extends the use occasion of direct current generator, makes product
The market competitiveness is significantly improved.
Certainly, direct current generator not only includes dc motor, in addition to dc generator, wherein, the work of dc generator
Make principle with dc motor and chatted on the contrary, no longer go to live in the household of one's in-laws on getting married one by one herein.
Technical solutions of the utility model set insulation filling part 130 by using the separation trough 140 in commutative ring 100 is interior,
And insulation filling part 130 is back to the outer surface rounding off of a side surface of insulating body 110 and adjacent commutator segment 120, such as
This, the surface of commutative ring 100 is complete round and smooth occluding surface, when brush is slidably contacted the surfaces with commutative ring 100, brush all the time with
The surface of commutative ring 100 is abutted, and then inhibits the generation of commutation spark and commutation noise, while reducing brush and commutative ring
Abrasion between 100, improves the service life of brush；Meanwhile, this commutator 10 reduces what commutation spark was produced in commutation
Probability, and then reduce the harmful effect that direct current generator generation electromagnetic interference (EMC) is produced to the wireless device of surrounding, it is to avoid
The high frequency electric that commutation spark is produced is transmitted among circuit by motor wiring makes whole circuit be affected, and effectively improves
The service behaviour of direct current generator and the use occasion for extending direct current generator, make the competitiveness of product in market significantly be carried
Rise.
Further, in order to save the material cost of insulation filling part 130, insulation filling part 130 can be located at separation trough
The position of 140 correspondence brushes, i.e., the portion in separation trough 140 is provided only with insulation filling part 130, and remaining position is empty
Put.Now, brush and insulation filling part 130 are abutted, and can also realize the effect above.Certainly, in some other embodiments, this is exhausted
Length direction of the edge filling member 130 along separation trough 140 is extended so that insulation filling part 130 is filled up completely with whole separation
In groove 140, in this way, set location of the insulation filling part in separation trough need not be considered, it is not necessary to corresponding with brush position, enter
And in order to which in separation trough 140, insulation filling part 130 is reduced into production difficulty.
In the present embodiment, the side surface back to insulating body 110 of insulation filling part 130 is in convex globoidal, and the convex arc
The outer surface of the extended surface in face and adjacent commutator segment 120 coincides, now the cambered surface of insulation filling part 130 and commutator segment 120
Cambered surface be spliced to form one big cambered surface, the cambered surface and the cambered surface of insulation filling part 130 of all commutator segment 120 are stitched together
It is collectively forming a smooth periphery.In this way, the surface of the commutative ring 100 then abutted with brush is in smooth periphery, this
When brush and the frictional resistance on the surface of commutative ring 100 greatly reduce, and then the cunning being more favorable between brush and commutative ring 100
Dynamic contact, reduces the abrasion of brush and commutative ring 100, and then improve the service life of brush.Simultaneously as brush is with changing
It is smooth to being slided between ring 100, the generation of commutation spark and commutation noise is decreased, and then decrease direct current generator generation
The harmful effect that electromagnetic interference (EMC) is produced to the wireless device of surrounding.
Reference picture 2 and Fig. 3, in order that brush and the surface of commutative ring 100 can preferably sliding contact, reduce both rub
Resistance is wiped, the insulation filling part 130 is provided with lubricating layer 131, the lubricating layer 131 and brush back to the side of insulating body 110
Contact jaw is abutted against.In this way, when brush is slid on lubricating layer 131, lubricating layer 131 has lubrication to brush so that
Coefficient of friction between brush and commutative ring 100 is substantially reduced, and reduces frictional damping, efficiently avoid brush and commutative ring
Abrasion between 100, improves the service life of brush.Silicone grease is a kind of special organosilicon between silicone oil and silicon rubber
Material, it is the Castor Oil for having silicone oil, has the nonflowing character of silicon rubber again, in addition the spy of its organosilicon material possessed
Property, industrially it is used widely therefore, lubricating layer 131 can be as made by silicone grease.
In direct current generator rotation process, because commutative ring 100 follows machine shaft to rotate, and brush is fixed to be connected to and changed
To the surface of ring 100, there is run-out error in machine shaft, now unavoidably due to factors such as the accuracies of manufacture, and machine shaft turns
When dynamic, brush is uneven in the stress degree of different time, and then is easily caused brush chattering, produces commutation noise.Due to changing
Commutator segment 120 into ring 100 is generally the conducting strip of metal material, and such as copper sheet, the hardness of commutator segment 120 is higher, with
It is rigid cooperation during brush contact, exacerbates the generation of brush-commutated noise.Reference picture 4, makes an uproar to further suppress commutation
Sound, weakens the oscillation intensity of brush, in the present embodiment, and insulation filling part 130 is provided with vibration damping back to the side of insulating body 110
Layer 132, the damping layer 132 should as made by elastomeric material, itself have certain elasticity so that insulation filling part 130
It is flexible contact between brush, damping layer 132 has the effect for the vibrational energy for absorbing brush, the vibration for reducing brush is strong
Degree, with the effect for suppressing commutation noise.
In this commutator 10, the insulating body 110 as made by phenolic moulding powder, bakelite material have good insulating properties and
Anti-flammability, and it also possesses good intensity, can be commutative ring 100 when the machine shaft of direct current generator runs at high speed
To good supporting role.Soft mica, bakelite, plastics and ceramic material are respectively provided with good insulating properties, thus above-mentioned exhausted
Edge filling member 130 can be made by the one or more in soft mica, plastics or ceramic material.Wherein, above-mentioned insulation filling
When part 130 is soft mica or plastics, soft mica or plastics can be injected in separation trough 140 by Shooting Technique, and then will
Above-mentioned insulation filling part 130 is clamped securely in separation trough 140；, can when above-mentioned insulation filling part 130 is bakelite or ceramics
By the way that bakelite or ceramics are fixed in separation trough 140 by tight fit mode clamping, it can also be consolidated by modes such as gluing, welding
Due in separation trough 140, it is not especially limited herein.
In the present embodiment, made by above-mentioned insulation filling part 130 preferably soft mica material, wherein, soft mica
Itself possesses elasticity, and it is flexible contact between brush, also can absorb the effect of the vibrational energy of brush, reduces brush
Oscillation intensity, it may have suppress the effect of commutation noise.When above-mentioned insulation filling part 130 is formed by soft mica material, its
Can be set by way of injection molding with separation trough 140.For example, by the soft mica of melting, being injected by injection molding manner
To separation trough 140, after cooled and solidified, final molding is handled by overlap.When manufacturing insulation filling part 130, first by soft cloud
Female particle is added in injecting machine material tube, carries out heating melting, on the front and rear base that particular manufacturing craft is arranged on to injection machine, the above
After preparation is ready, commutative ring 100 is put into mould, starts injection machine, by matched moulds, injection, cooling, die sinking, top
Go out and injection moulding process is completed after a series of actions, the commutative ring 100 of injection formed is carried out to go cast gate and deflashing to handle, by size
With the inspection of outward appearance, qualified commutative ring 100 is formed, qualified commutative ring 100 is finally pressed into machine shaft.
Further, in direct current generator, the overall volume size of the number of commutator segment 120 typically with direct current generator has
Close, meanwhile, the number of commutator segment 120 is unsuitable very few, simultaneously causes the separation trough 140 between adjacent commutator segment 120 relatively large,
So that the torque of rotor is excessive, it is unfavorable for the rotation of direct current generator；The quantity of commutator segment 120 is also unsuitable excessive, now, separation trough
140 width is smaller, when the overtension of direct current generator, in small distance between adjacent commutator segment 120, once between both
Away from less than safe distance, then exist between adjacent commutator segment 120 and jump arc phenomenon, serious middle meeting puncture insulation filling part 130, make
Commutator segment 120 and rotor windings short-circuit are obtained, direct current generator is finally burnt.Therefore, in the present embodiment, the commutator segment 120
Quantity be 3 to 16.
Further, for the ease of commutative ring 100 is attached on machine shaft, the inner peripheral surface of insulating body 110 encloses to be formed
The axis hole 111 coordinated with machine shaft, the end of axis hole 111 is set in enlarging.
The utility model also proposes a kind of direct current generator, the direct current generator include commutator 10, the commutator 10 it is specific
Structure because direct current generator employs whole technical schemes of above-mentioned all embodiments, therefore at least has with reference to above-described embodiment
All beneficial effects that the technical scheme for having above-described embodiment is brought, this is no longer going to repeat them.
Preferred embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited,
It is every under inventive concept of the present utility model, the equivalent structure made using the utility model specification and accompanying drawing content is become
Change, or directly/be used in other related technical fields indirectly and be included in scope of patent protection of the present utility model.
Claims (10)
1. a kind of commutator, for direct current generator, it is characterised in that including brush and commutative ring, the commutative ring includes：
Insulating body, annularly；
Multiple commutator segments, are arranged at intervals along the outer peripheral face of the insulating body, are formed between commutator segment described in arbitrary neighborhood two
There is separation trough；And
Insulation filling part, in the separation trough, and the side surface back to the insulating body of the insulation filling part with
The outer surface rounding off of the adjacent commutator segment.
2. commutator as claimed in claim 1, it is characterised in that the insulation filling part is described located at separation trough correspondence
The position of brush.
3. commutator as claimed in claim 1, it is characterised in that the insulation filling part completely fills in the separation trough.
4. the commutator as described in any one in claims 1 to 3, it is characterised in that the insulation filling part back to institute
The side surface for stating insulating body is in convex globoidal, and the outer surface of the extended surface of the convex globoidal and the adjacent commutator segment is heavy
Close.
5. the commutator as described in any one in claims 1 to 3, it is characterised in that the insulation filling part is by soft cloud
It is female made.
6. commutator as claimed in claim 5, it is characterised in that the insulation filling part is located at by the way of injection molding
The separation trough.
7. commutator as claimed in claim 1, it is characterised in that the insulation filling part back to the one of the insulating body
Side is provided with lubricating layer.
8. commutator as claimed in claim 7, it is characterised in that the lubricating layer is as made by silicone grease.
9. commutator as claimed in claim 1, it is characterised in that the insulation filling part is back to the side of the insulating body
Provided with damping layer.
10. a kind of direct current generator, it is characterised in that including the commutator described in any one in claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720320083.1U CN206619776U (en) | 2017-03-28 | 2017-03-28 | Commutator and direct current generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720320083.1U CN206619776U (en) | 2017-03-28 | 2017-03-28 | Commutator and direct current generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206619776U true CN206619776U (en) | 2017-11-07 |
Family
ID=60234535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720320083.1U Active CN206619776U (en) | 2017-03-28 | 2017-03-28 | Commutator and direct current generator |
Country Status (1)
| Country | Link |
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| CN (1) | CN206619776U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054711A (en) * | 2020-08-28 | 2020-12-08 | 北京纳米能源与系统研究所 | Mechanical rectification type friction nano power generation device |
| CN115149361A (en) * | 2022-07-29 | 2022-10-04 | 重庆长安汽车股份有限公司 | Commutator and brush motor |
-
2017
- 2017-03-28 CN CN201720320083.1U patent/CN206619776U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054711A (en) * | 2020-08-28 | 2020-12-08 | 北京纳米能源与系统研究所 | Mechanical rectification type friction nano power generation device |
| CN112054711B (en) * | 2020-08-28 | 2021-10-29 | 北京纳米能源与系统研究所 | Mechanical rectification type friction nano power generation device |
| CN115149361A (en) * | 2022-07-29 | 2022-10-04 | 重庆长安汽车股份有限公司 | Commutator and brush motor |
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