CN102204035A - Electric machine - Google Patents
Electric machine Download PDFInfo
- Publication number
- CN102204035A CN102204035A CN2009801427092A CN200980142709A CN102204035A CN 102204035 A CN102204035 A CN 102204035A CN 2009801427092 A CN2009801427092 A CN 2009801427092A CN 200980142709 A CN200980142709 A CN 200980142709A CN 102204035 A CN102204035 A CN 102204035A
- Authority
- CN
- China
- Prior art keywords
- brush
- starting device
- negative pole
- brushes
- positive
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 claims abstract description 16
- 230000004323 axial length Effects 0.000 claims description 4
- 239000007858 starting material Substances 0.000 abstract description 30
- 238000004804 winding Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 4
- 210000000515 tooth Anatomy 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0859—Circuits or control means specially adapted for starting of engines specially adapted to the type of the starter motor or integrated into it
-
- 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
- H02K13/10—Arrangements of brushes or commutators specially adapted for improving commutation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2048—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit said control involving a limitation, e.g. applying current or voltage limits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
Abstract
The invention relates to a method for operating a starter device comprising a starter motor which comprises a rotor that can be supplied with current by means of a commutator and brushes. The brushes are at least two positive brushes and at least two negative brushes. When there is a short-circuit in the brushes, a current density, which is a quotient of an electric current and a cross-section of a brush, is produced, said brush being either a negative or a positive brush. The current density in the short-circuit is less than 4,0A/mm2.
Description
Technical field
The present invention relates to a kind of operation method with starting device of starting motor.
Background technology
Mainly use the DC motor of mechanical switching for cranking internal combustion engine.Electric current by one or more brush to and be imported in the armature winding by commutator.These brush great majority are made by agglomerated material, and this agglomerated material mainly contains copper component and graphite composition.These carbon brush and commutator all can be worn at work.In addition, typically, starter is designed to short time work and under normal circumstances is applicable to 30,000-60,000 break-make circulation.
Summary of the invention
Verified, should be designed to higher load and be used for long running time (for example rising/shut-down operation mode under needed) for the starter of permanent-magnet-field, in order to improve the break-make number of times that can reach, the maximum current density in carbon brush has decisive influence to total break-make number of times of carbon brush.
In order to guarantee the desirable wearing character of carbon brush, current density must be enough little.Maximum current density in starter is subjected to multiple result's influence.On the one hand, the final effectively maximum current density in starter is the design by motor (whole device), certainly also by employed lead resistance decision.The current density maximum the time be engraved in when connecting and reach.When short circuit (armature is static, does not promptly have rotation), reach maximum electric current.
If the break-make number of times of necessity of traditional starter, must provide optimum wearing character so owing to the mode of operation (for example rising/the shut-down operation mode) of the frequent re-lighting on internal combustion engine increases.As far as possible little for the wearing and tearing that remain in the commutation parts, therefore must be reduced in the current density in the carbon brush.Verified, use for normal starter, under the situation of short circuit, (adopt the battery and the minimum lead resistance that allow to greatest extent), 4.5 in the carbon brush is to 7.5A/mm
2Current density be acceptable.Current density is calculated divided by the brush area (cross-sectional area) of positive brush or negative pole brush by maximum short circuit electric current.For the maximum short circuit electric current of 1400A and the brush size of 6mm * 16mm, under the situation of 2 positive brushes, obtain j=1400A/ (2* (6*16mm thus
2))=7.3A/mm
2Value.But if realize significantly improving of starter break-make number of times, these current densities are too high so.Must reduce current density by break-make number of times as required.Verified, under the short circuit situation (adopt minimum lead resistance and the battery of permission) to greatest extent less than 4.0A/mm
2Current density, can realize significantly improving of break-make number of times.
Description of drawings
Fig. 1 shows the longitudinal section of starting device,
Fig. 2 shows the schematic axial view according to the device of first kind of embodiment,
Fig. 3 shows the schematic axial view according to the device of second kind of embodiment,
Fig. 4 and Fig. 5 show the cross-sectional view of a positive brush and a negative pole brush respectively,
Fig. 6 shows the motor vehicles with starting device.
Embodiment
Fig. 1 shows starting device with longitudinal section.Figure 1 illustrates starting device 10.This starting device 10 for example has starting motor 13 and starter relay 16.Described starting motor 13 and starter relay 16 are fixed on the common drive end bearing lid 19.Described starting motor 13 is being used on the function when starter pinion is engaged to the gear ring 25 of internal combustion engine (not shown) here, drives starter pinion 22.
Starting motor 13 has the utmost point pipe 28 as housing, a plurality of permanent magnetism magnetic poles 31 of all within it upper supports of described utmost point pipe.Magnetic pole 31 surrounds rotor 37 (armature) again, and this rotor has armature core 43 that is made of thin slice 40 and the armature winding 49 that is arranged in a plurality of grooves 46.Armature core 43 is pressed on the driving shaft 44.This external driving shaft 44 away from commutator 52 also has been installed on the end of starter pinion 22, described commutator 52 especially is made of a plurality of single commutator thin slices 55.Commutator thin slice 55 is electrically connected with armature winding 49 by known method, makes to produce rotatablely moving of rotor 37 when giving 55 energisings of commutator thin slice by brush 58 in utmost point pipe 28.The current feed 61 that is arranged between starter relay 16 and the starting motor 13 not only is brush 58 when on-state but also is excitation winding 34 power supplies.Driving shaft 44 is supported in the sliding bearing 67 by axle journal 64 in commutator one side, and this sliding bearing 67 remains on to fixed-site again in the commutator bearing lid 70.Described commutator head 70 is fixed in the drive end bearing lid 19 by means of pull bar 73 again, and described pull bar 73 is distributed on the periphery of utmost point pipe 28 (as screw, for example two, three or four).At this, utmost point pipe 28 is supported on the drive end bearing lid 19, and commutator bearing lid 70 is supported on the utmost point pipe 28.
See that along driving direction connected a so-called sun gear 80 on rotor 37, this sun gear is the part of planetary gears 83.Sun gear 80 is by a plurality of planetary gears 86, and normally three planetary gears 86 that are supported on the axle journal 92 by means of rolling bearing 89 surround.Planetary gear 86 rolls in ring gear 95, and described ring gear 95 is supported in the utmost point pipe 28 with the outside.In the direction towards outlet side, planet carrier 98 joins with planetary gear 86, and axle journal 92 is contained in the described planet carrier.Planet carrier 98 is bearing in intermediate support spare 101 again and is arranged in the sliding bearing 104 in this intermediate support spare 101.Intermediate support spare 101 is designed to basin shape, so that hold planet carrier 98 and planetary gear 86 therein.In addition, also be provided with ring gear 95 for 101 li at the intermediate support spare of basin shape, this ring gear seals with respect to rotor 37 by cover 107 at last.Intermediate support spare 101 also is supported on the inboard of utmost point pipe 28 by its neighboring.Rotor 37 has another and is contained in axle journal 110 in the sliding bearing 113 equally on the end away from commutator 52 of driving shaft 44.Described sliding bearing 113 is contained in again in the medium pore of planet carrier 98.Planet carrier 98 is connected integratedly with output shaft 116.This output shaft 116 is bearing in another bearing 122 by its end 119 away from intermediate support spare 101, and this another bearing fixing is in drive end bearing lid 19.Output shaft 116 is divided into different sections: what be connected on section back in the sliding bearing 104 that is arranged on intermediate support spare 101 is the section that has so-called straight-tooth 125 (internal tooth), and this straight-tooth is the part of so-called axle-hub syndeton.In this case, this-hub syndeton 128 makes drivening piece 131 linear slide vertically become possibility.This drivening piece 131 is protuberances of sleeve-like, and the basin shape outer ring 132 of this protuberance and freewheel 137 is one.This freewheel 137 (directed brake) comprises the inner ring 140 that is disposed radially 132 inside in the outer ring in addition.Between inner ring 140 and outer ring 132, be provided with clamping body 138.This clamping body 138 and inner ring and outer ring acting in conjunction prevent relatively rotating towards second direction between outer ring and inner ring.In other words, freewheel 137 can be realized a relative motion towards a direction between inner ring 140 and the outer ring 132.In the present embodiment, to be implemented as the helical teeth 143 (outer helical teeth) with starter pinion 22 and this starter pinion be one to described inner ring 140.
For the sake of completeness, also engaging mechanism to be discussed here.Described starter relay 16 has binding post 150, and this binding post is electric contact piece and is connected on the positive pole of starter battery (not shown here).This binding post 150 passes relay cover 153.Described relay cover 153 enclosed relay housings 156, this relay housing is fixed on the drive end bearing lid 19 by means of a plurality of retaining elements 159 (screw).In starter relay 16, also be provided with and attract winding 162 and so-called maintenance winding 165.Described attraction winding 162 and keep winding 165 both produce an electromagnetic field respectively when the state of connecting, this electromagnetic field not only passes relay housing 156 (being made by the electromagnetism conductive of material), but and passes the armature 168 and the armature yoke 171 of linear movement.Described armature 168 has push rod 174, and when the described armature 168 of linear suction, described push rod 174 moves towards switch pin 177 directions.Move towards switch pin 177 by push rod 174, this switch pin 177 is moved from the direction of its resting position to two contacts 180 and 181, two contacts 180 and 181 are electrically connected mutually thereby be installed in the contact bridge 184 of switch pin 177 on the end of contact 180 and 181.Electrical power is transferred to current feed 61 and is transferred to brush 58 thus through contact bridge 184 from binding post 150 thus.Described starting motor 13 is energized at this moment.
But, described starter relay 16 or more particularly armature 168 also have a task, that is, make a lever motion that is arranged on rotationally in the drive end bearing lid 19 by pulling element 187.Usually this lever 190 that is constructed to wishbone lever encases two discs 193 and 194 by two " pointed tooths " that do not illustrate here on its periphery, so that be clipped in resistance that transmission ring 197 between these two discs overcomes spring 200, and starter pinion 22 is engaged in the gear ring 25 to freewheel 137 motions.
Just do not determine as yet by the moment of rotation by rotor 37 after connecting starting device 10 for the short circuit situation.At this constantly, the electric current I of maximum
BThe brush of flowing through.At this, when the starter battery of having selected to allow to greatest extent under the minimum situation of the resistance of feed line 263 and loop line 264 260 (referring to Fig. 6) during as power supply, short circuit is worst for brush 58.
A brush 58 (no matter being positive brush 250 or negative pole brush 253) has tangential width B and axial length L, and wherein, the ratio of L/B is more than or equal to 4, and maximum is no more than 5.5, preferably is 5 to the maximum.The direction of axial length L is the direction of rotation.
Figure 3 illustrates device with three positive brushes 250 and three negative pole brushes 253.
According to a kind of flexible program, positive brush 250 has the cross section Q perpendicular to the sense of current, and negative pole brush 253 has the cross section Q perpendicular to the sense of current, and wherein, the cross section Q of positive brush 250 and the cross section Q of negative pole brush 253 are of different sizes.
Fig. 4 and Fig. 5 show the cross section Q of positive brush 250 and negative pole brush 253.
The device in motor vehicles 300 according to shown in Figure 6 is provided with starter battery 260 as power supply, and starting device 10 is connected on this starter battery.The starter battery has the steady voltage of 12V at this.
The present invention's regulation, the feed line 263 between power supply and starting device 10 and the resistance R of loop line 264 are approximately 1mOhm (milliohm).
Has the situation of the rated power of 2.0kW at least for starting device 10, the interior resistance R of regulation power supply
iBe approximately 3.7mOhm; This value can be that the conventional lead-acid battery (starter battery 260) of 90Ah reaches by means of capacity for example.Therefore, in the structure that the feed line 263 that is approximately 1mOhm (milliohm) by starting device 10 (rated power is at least 2.0kW), resistance between power supply (starter battery 260) and starting device 10 and loop line 264 constitute, can be implemented in current density under the short circuit situation less than 4.0A/mm
2
Has situation for starting device 10, the interior resistance R of regulation power supply less than the rated power of 2.0kW
iBe approximately 4.5mOm; This value can be that 53Ah and low-temperature test electric current are that the conventional lead-acid battery (starter battery 260) of 470A reaches by means of capacity for example.Therefore, in the structure that the feed line 263 that is approximately 1mOhm (milliohm) by starting device 10 (rated power is less than 2.0kW), resistance between power supply (starter battery 260) and starting device 10 and loop line 264 constitute, can be implemented in current density under the short circuit situation less than 4.0A/mm
2
The present invention's regulation, the outer perimeter of the commutator 52 that rotates within positive brush and negative pole brush is up to 2*PI*16.5mm, is preferably 2*PI*15mm (PI is a circumference ratio).
The present invention's regulation, starting device 10 is done the method running to rise/to stop work, and wherein, starting device 10 is arranged in the vehicle 300, and this vehicle has had/has stopped work the mode of doing.Rise/stop work and make mode and under the situation that does not need to drive for vehicle 300, close internal combustion engine.This situation is especially discerned by means of transducer.For example under the situation that runs into the traffic lights that indication " stops " or under so-called situation about loitering (traffic jam).Because this working method must significantly improve number of starts (cranking internal combustion engine 300).
Claims (10)
1. the operation method that has the starting device (10) of starting motor (13), wherein, described starting motor (13) has rotor (37), this rotor can be energized by means of a commutator (52) and a plurality of brush (58), described a plurality of brush (58) is at least two positive brushes (250) and at least two negative pole brushes (253), wherein, producing a current density under the short circuit situation respectively in each brush (58), described current density is the electric current (I of a brush (58)
B) and cross-sectional area (Q
B) ratio, wherein, this brush (58) is positive brush (253) or is negative pole brush (250) that it is characterized in that, the described current density under the short circuit situation is less than 4.0A/mm
2
2. in accordance with the method for claim 1, it is characterized in that a brush (58) has tangential width (B) and axial length (L), wherein, the ratio of tangential width (B) and axial length (L) is greater than or equal to 4, but maximum is no more than 5.5, preferably is 5 to the maximum.
3. according to claim 1 or 2 described methods, it is characterized in that described device has three positive brushes (250) and three negative pole brushes (253).
4. according to any described method in the claim 1 to 3, it is characterized in that described positive brush (250) has the cross section (Q perpendicular to the sense of current
B) and described negative pole brush (253) have cross section (Q perpendicular to the sense of current
B), wherein, the cross section (Q of described positive brush (250)
B) have a cross section (Q with described negative pole brush (253)
B) different sizes.
5. any described method in requiring according to aforesaid right is characterized in that described starting device (10) is connected with power supply, and this power supply has the steady voltage of 12V.
6. in accordance with the method for claim 5, it is characterized in that the resistance of the lead-in wire between described power supply and described starting device (10) is approximately 1mOhm.
7. according to claim 5 or 6 described methods, it is characterized in that described starting device (10) has the rated power of 2.0kW at least, and the interior resistance of power supply is approximately 3.7mOhm.
8. according to claim 5 or 6 described methods, it is characterized in that described starting device has the rated power less than 2.0kW, and the interior resistance of power supply is approximately 4.5mOhm.
9. any described method in requiring according to aforesaid right is characterized in that the outer perimeter of the described commutator (52) that rotates is up to 2*PI*16.5mm, is preferably 2*PI*15mm within anodal and negative pole brush.
10. according to any described method in the claim, it is characterized in that described starting device is done the method operation to rise/to stop work, wherein, described starting device is arranged in the vehicle that has had/stopped work the mode of doing.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008041688.6 | 2008-08-29 | ||
| DE200810041688 DE102008041688A1 (en) | 2008-08-29 | 2008-08-29 | Electric machine |
| PCT/EP2009/060492 WO2010023107A1 (en) | 2008-08-29 | 2009-08-13 | Electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102204035A true CN102204035A (en) | 2011-09-28 |
Family
ID=41466810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801427092A Pending CN102204035A (en) | 2008-08-29 | 2009-08-13 | Electric machine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2319140A1 (en) |
| CN (1) | CN102204035A (en) |
| DE (1) | DE102008041688A1 (en) |
| WO (1) | WO2010023107A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709772A (en) * | 2012-04-26 | 2012-10-03 | 锦州汉拿电机有限公司 | Carbon brush holder assembly for starter and assembling method thereof |
| CN106537735A (en) * | 2015-06-02 | 2017-03-22 | 申克霍夫曼碳科技股份公司 | Electrical machine with brush and commutator having specific distribution of electrical conductivity for suppression of sparking |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3047618B1 (en) * | 2016-02-05 | 2018-03-09 | Valeo Equipements Electriques Moteur | MOTOR VEHICLE STARTER PROVIDED WITH COIL OUTPUTS CONNECTED TO AN ULTRASOUND ELECTRICAL CONNECTION BRIDGE |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2428162A (en) * | 1943-11-06 | 1947-09-30 | Electrical Engineering And Mfg | End bell for electrical machines |
| US4221046A (en) * | 1977-03-07 | 1980-09-09 | Eltra Corporation | Method for assembling a brush cage |
| EP0098991A1 (en) * | 1982-07-10 | 1984-01-25 | Robert Bosch Gmbh | Brush holder device for electric machines |
| EP0395515A1 (en) * | 1989-04-25 | 1990-10-31 | Mitsuba Electric Manufacturing Co., Ltd. | A brush arrangement for DC motor |
| EP1351348A1 (en) * | 2002-04-04 | 2003-10-08 | Tris, Inc. | Metal-graphite brush and production method thereof |
| JP2004096836A (en) * | 2002-08-29 | 2004-03-25 | Mitsuba Corp | Rotary electric machine |
| WO2004075373A2 (en) * | 2003-02-18 | 2004-09-02 | Energy Conversion System Holdings Llc | Composite electrical brush construction |
-
2008
- 2008-08-29 DE DE200810041688 patent/DE102008041688A1/en not_active Withdrawn
-
2009
- 2009-08-13 WO PCT/EP2009/060492 patent/WO2010023107A1/en active Application Filing
- 2009-08-13 EP EP09781799A patent/EP2319140A1/en not_active Withdrawn
- 2009-08-13 CN CN2009801427092A patent/CN102204035A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2428162A (en) * | 1943-11-06 | 1947-09-30 | Electrical Engineering And Mfg | End bell for electrical machines |
| US4221046A (en) * | 1977-03-07 | 1980-09-09 | Eltra Corporation | Method for assembling a brush cage |
| EP0098991A1 (en) * | 1982-07-10 | 1984-01-25 | Robert Bosch Gmbh | Brush holder device for electric machines |
| EP0395515A1 (en) * | 1989-04-25 | 1990-10-31 | Mitsuba Electric Manufacturing Co., Ltd. | A brush arrangement for DC motor |
| EP1351348A1 (en) * | 2002-04-04 | 2003-10-08 | Tris, Inc. | Metal-graphite brush and production method thereof |
| JP2004096836A (en) * | 2002-08-29 | 2004-03-25 | Mitsuba Corp | Rotary electric machine |
| WO2004075373A2 (en) * | 2003-02-18 | 2004-09-02 | Energy Conversion System Holdings Llc | Composite electrical brush construction |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709772A (en) * | 2012-04-26 | 2012-10-03 | 锦州汉拿电机有限公司 | Carbon brush holder assembly for starter and assembling method thereof |
| CN102709772B (en) * | 2012-04-26 | 2014-09-10 | 锦州汉拿电机有限公司 | Carbon brush holder assembly for starter and assembling method thereof |
| CN106537735A (en) * | 2015-06-02 | 2017-03-22 | 申克霍夫曼碳科技股份公司 | Electrical machine with brush and commutator having specific distribution of electrical conductivity for suppression of sparking |
| CN106537735B (en) * | 2015-06-02 | 2019-04-05 | 申克霍夫曼碳科技股份公司 | With with specific distribution of conductivity to inhibit the brush of spark and the motor of commutator |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2319140A1 (en) | 2011-05-11 |
| DE102008041688A1 (en) | 2010-03-04 |
| WO2010023107A1 (en) | 2010-03-04 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110928 |