EP2543118A1 - Verfahren zur herstellung einer kohlebürste in einem kommutator - Google Patents
Verfahren zur herstellung einer kohlebürste in einem kommutatorInfo
- Publication number
- EP2543118A1 EP2543118A1 EP11705211A EP11705211A EP2543118A1 EP 2543118 A1 EP2543118 A1 EP 2543118A1 EP 11705211 A EP11705211 A EP 11705211A EP 11705211 A EP11705211 A EP 11705211A EP 2543118 A1 EP2543118 A1 EP 2543118A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- carbon brush
- commutator
- carbon
- brush
- carbon brushes
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/12—Manufacture of brushes
-
- 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
- H01R39/26—Solid sliding contacts, e.g. carbon brush
Definitions
- the invention relates to a method for producing a carbon brush in a commutator for power transmission in an electrical machine.
- Commutators are used in electric motors for power transmission to the armature rotatably mounted in a stator and for current application in short-circuited armature coils.
- the commutators consist of an armature-side collector and housing-mounted carbon brushes, which rest against the lateral surface of the rotating collector.
- a carbon brush for a small motor which consists of a graphite powder, which is mixed with metal powder, compression-molded and then sintered. Such carbon brushes is added as metal content, for example copper.
- the collector and the carbon brushes are subject to wear during operation.
- the amount of wear must be designed according to the intended use.
- electric starter motors in internal combustion engines are subject to relatively high loads and must ensure a high number of switching cycles without restricting functionality.
- Due to the long service life of the carbon brushes care must be taken to ensure that removed material as well as a lubricating film built up on the collector are cleaned automatically.
- different substances can be mixed into the carbon brushes, which ensure that the surface of the collector has a consistent, clean and at the same time lubricating surface.
- coal have a relatively high number of pores made of a sintered material by design, through which the material is exposed to increased environmental influences, which can lead to material changes, in particular an increase in the electrical resistance of the carbon brushes.
- the invention is based on the object to design carbon brushes in commutators with simple measures for a long service life.
- the inventive method is used for producing a carbon brush in a commutator for power transmission in an electrical machine.
- an application to electric starters for internal combustion engines into consideration which are designed system-based on a large number of start cycles.
- start-stop systems in motor vehicles in which, for example, in a traffic light stop the engine automatically off and at a clutch or
- Gear operation is automatically switched on again, a proper functioning of the commutator must be ensured over a long period of operation.
- an anticipation of the change in the properties is achieved by the inventive method before the use of carbon brushes in the commutator until an at least approximately constant property level is reached and in use in the commutator no further, significant change in the carbon brushes is to be expected.
- the process according to the invention thus anticipates the normal aging of the carbon brushes to a higher internal resistance. The performance characteristics of the electric machine in which the carbon brush is used are therefore not appreciable over the operating period
- Another advantage of anticipating aging effects in the carbon brushes is the reduction of changes in the resistance system of the electric motor. If, for example, a starter is used in an electrical system of a motor vehicle, the anticipated aging of the carbon brushes also anticipates the increase in the specific resistance in the carbon brushes, with the result that the maximum retrieved current intensity is reduced by the starter, as a result of which the load on the carbon brushes is also reduced On-board network is reduced when switching on the starter. This is particularly advantageous for start-stop systems in vehicles in which low loads of the starter for the electrical system are required.
- the artificial aging process to which the carbon brushes are subjected prior to the assembly of the commutator takes place according to the invention by a storage of the carbon brushes for a defined period of time at elevated temperature.
- the carbon brushes are preferably stored in a temperature range between 120 ° and 280 °, wherein the storage period is preferably for a period of 24 h to 250 h.
- the moisture can be taken into account during storage, with higher humidity the temperatures can be reduced.
- the temperature is 42 ° and the relative humidity is 92%.
- storage takes place, for example, at 200 ° C. for 150 h.
- This specific electrical resistance provided by the carbon brush to perform the artificial aging increases in the course of use of the carbon brush in the electric motor not significant, so that even with no further change in electrical characteristics
- the electrical but also the mechanical properties of the carbon brush are changed by the storage so that the artificial aging process anticipates the greatest proportion of the change in mechanical properties, so that in operation mechanical properties are no longer in egg
- the increase in electrical resistivity can be measured and used to identify a carbon brush pretreated in the inventive manner.
- FIG. 1 shows a perspective view of a commutator in an electrical machine, consisting of an armature-side collector and two diametrically opposite, the collector surface area contacting carbon brushes.
- the commutator 1 shown in FIG. 1 is used for power transmission and current application in electrical machines such as electric motors or motors. generators and is preferably used in starters for internal combustion engines. Such starters are designed for a high number of starting operations, especially in the case of motor vehicles, which are equipped with start-stop systems for automatically switching off and on of the internal combustion engine.
- the commutator 1 comprises a cylindrical collector 2 which is rotatably connected to the armature of the electric machine, wherein the armature is rotatably mounted in a stator.
- the commutator 1 further comprises carbon brushes 3, which abut in the embodiment shown diametrically opposite to the radially outer surface of the cylindrical collector 2 and a disc running surface on contact and transmit the electric current to the collector 2, which via a strand 4 in the respective Carbon brush 3 is passed.
- the collector 2 can also be designed as a disc.
- the collector 2 has a plurality of circumferentially separated segments 5, which are each electrically connected to armature coils. During a rotational movement of the armature and the collector 2 in the direction of rotation 6, the lateral surface of the collector slides along the facing end face of the carbon brushes 3, at the same time the power transmission from the carbon brushes 3 takes place on the segments 5 of the collector. 2
- the carbon brushes 3 are subjected to anticipated aging to ensure that no aging effects during operation lead to a change in the commutator system.
- the anticipated aging of the carbon brushes takes place before installation in the commutator, in that the carbon brushes, which are usually constructed as sintered components made of graphite and have copper components, are subjected to an artificial aging process in which the carbon brushes are stored for a defined period of time at elevated temperature , Storage takes place, for example, in a temperature range between 120 ° and 280 ° and over a period of, for example, 24 h to 250 h, with a longer storage in the case of a lower temperature and a shorter storage time in the case of a higher temperature.
- moisturize the carbon brushes can be produced an artificial aging process, for example in a temperature range between 30 ° and 70 ° for a period of 24 hours to 160 hours and at a relative temperature. humidity of 70% to 95%. With higher relative humidity, generally lower temperatures are sufficient. For example, with a relative humidity of 92%, a storage temperature of 42 ° can be selected.
- the copper components in the carbon brushes are oxidized, so that the copper oxide content increases significantly.
- the increase is for example from 1, 1% to 2.9%.
- the specific electrical resistance is increased by the artificial aging of a value range of for example 0.5 ⁇ to 0.9 ⁇ to a range of values after performing the artificial aging of, for example 1.1 ⁇ to 1 .5 ⁇ .
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Current Collectors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010002536A DE102010002536A1 (de) | 2010-03-03 | 2010-03-03 | Verfahren zur Herstellung einer Kohlebürste in einem Kommutator |
PCT/EP2011/052637 WO2011107378A1 (de) | 2010-03-03 | 2011-02-23 | Verfahren zur herstellung einer kohlebürste in einem kommutator |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2543118A1 true EP2543118A1 (de) | 2013-01-09 |
EP2543118B1 EP2543118B1 (de) | 2014-10-29 |
Family
ID=43759439
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11705211.8A Not-in-force EP2543118B1 (de) | 2010-03-03 | 2011-02-23 | Verfahren zur herstellung einer kohlebürste in einem kommutator |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120313479A1 (de) |
EP (1) | EP2543118B1 (de) |
CN (1) | CN102782962A (de) |
DE (1) | DE102010002536A1 (de) |
WO (1) | WO2011107378A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109951009B (zh) * | 2019-03-28 | 2020-05-12 | 蓝全步 | 一种防轴向往复运动偏磨的集转同压发电机 |
DE102021204566A1 (de) | 2021-05-06 | 2022-11-10 | Kaco Gmbh + Co. Kg | Wellenerdungsring sowie Verfahren zur Herstellung desselben |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3841906A (en) * | 1972-09-14 | 1974-10-15 | Gen Electric | Method of treating a carbon current collection brush blank and brush resulting therefrom |
US4119572A (en) * | 1975-11-04 | 1978-10-10 | Georgy Nikolaevich Fridman | Carbon-graphite material for brushes of electric machines and method for preparing same |
US5227689A (en) | 1989-08-11 | 1993-07-13 | Mabuchi Motor Co., Ltd. | Metal-filled graphite for miniature motors and method of making same |
WO2002001700A1 (fr) * | 2000-06-28 | 2002-01-03 | Totankako Co., Ltd. | Balai au carbone pour machine electrique |
JP3914804B2 (ja) * | 2002-04-04 | 2007-05-16 | トライス株式会社 | 金属黒鉛質ブラシ及びその製造方法 |
US7622844B1 (en) * | 2003-12-30 | 2009-11-24 | Hipercon, Llc | Metal fiber brush interface conditioning |
DE502005001969D1 (de) * | 2005-04-12 | 2007-12-27 | Schunk Kohlenstofftechnik Gmbh | Verfahren zur Herstellung von Kohlebürsten und nach diesem Verfahren hergestellte Kohlebürsten |
WO2007055164A1 (ja) * | 2005-11-10 | 2007-05-18 | Mitsuba Corporation | 電動モータのカーボンブラシおよびカーボンブラシの製造方法 |
-
2010
- 2010-03-03 DE DE102010002536A patent/DE102010002536A1/de not_active Withdrawn
-
2011
- 2011-02-23 WO PCT/EP2011/052637 patent/WO2011107378A1/de active Application Filing
- 2011-02-23 US US13/574,211 patent/US20120313479A1/en not_active Abandoned
- 2011-02-23 CN CN2011800117170A patent/CN102782962A/zh active Pending
- 2011-02-23 EP EP11705211.8A patent/EP2543118B1/de not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2011107378A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102010002536A1 (de) | 2011-09-08 |
CN102782962A (zh) | 2012-11-14 |
WO2011107378A1 (de) | 2011-09-09 |
EP2543118B1 (de) | 2014-10-29 |
US20120313479A1 (en) | 2012-12-13 |
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