WO2009053214A1 - Bürstenvorrichtung mit einer litze für eine elektromaschine - Google Patents
Bürstenvorrichtung mit einer litze für eine elektromaschine Download PDFInfo
- Publication number
- WO2009053214A1 WO2009053214A1 PCT/EP2008/062944 EP2008062944W WO2009053214A1 WO 2009053214 A1 WO2009053214 A1 WO 2009053214A1 EP 2008062944 W EP2008062944 W EP 2008062944W WO 2009053214 A1 WO2009053214 A1 WO 2009053214A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- brush
- strand
- spring
- brush device
- commutator
- Prior art date
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
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/36—Connections of cable or wire to brush
-
- 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
- H01R39/38—Brush holders
- H01R39/40—Brush holders enabling brush movement within holder during current collection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/14—Means for supporting or protecting brushes or brush holders
- H02K5/143—Means for supporting or protecting brushes or brush holders for cooperation with commutators
- H02K5/148—Slidably supported brushes
Definitions
- a brush device for an electric machine with a brush holder, with a brush housed in the brush holder, in which a first strand is integrated, and with a spring, which biases the brush in the brush holder against a commutator.
- E-machines mechanically commutated electric machines
- DC motors To start internal combustion engines mechanically commutated DC motors are in use.
- the current is introduced via one or more pairs of brushes via the commutator in the armature winding.
- the brushes are usually made of a sintered material, which has mainly copper and graphite shares.
- the brushes are called carbon brushes due to the high graphite content.
- the carbon brushes and the commutator are subject to wear during operation.
- the DC motor also called a starter, is designed for short-term operation and is usually designed for 30,000 to 60,000 switching cycles.
- the strand is arranged in the brush in the radial direction in series behind a spring.
- the brush is pressed against the commutator and has a limited possible wear length.
- the wear length extends in the lateral cross section seen from the contact surface of the brush to the commutator to the beginning of the cross section of the injected in the brush strand. Such a wear length is for one Use with higher loads as for higher switching cycles and longer running times for a required specific service life is not sufficient.
- the following brushes or brush holders are also known from the prior art.
- DE 23 50 456 A1 describes a replaceable brush holder for an electric machine with a brush holder carrier to which a spring is attached with a carbon brush.
- the carbon brush can be pressed against the slip ring or commutator only up to a certain level of wear.
- An essential idea of the invention is to increase the wear length, in which the strand is formed offset in the radial direction R parallel to the spring in the brush. According to the invention, the strand is thus no longer under the spring, but is slightly offset.
- the wear length increases at a staggered strand thus at least the length by which the strand is integrated integrated backwards towards a bottom of the brush holder in the brush.
- the strand can be arranged parallel to the spring in the brush, the strand is no longer necessarily the sole limit of wear.
- at least one second stranded wire is integrated in the brush. Due to the division of the electric current from a strand on at least one further second strand, the cross-section of the strands can be lowered, so that the wear length is increased in the same space compared to a arranged in the brush under the spring strand. This wear length can already represent a sufficient increase in the wear length in order to achieve a desired service life.
- the first and at least second strand are formed offset in the brush in the radial direction parallel to the spring.
- the wear length is further increased. It should only be noted that the first and second strand from the side edge of the brush and the edge to the support surface of the brush with the spring for stability reasons are arranged with a sufficient distance.
- a similar cross-section in the strands may result in improved heat conduction within the brush, i. lead to a more homogeneous heat flow.
- the first and at least second strand seen in the lateral cross-section are arranged in edge regions of the brush. This has the advantage that the wear length is increased by the fact that the strands are removed from the central radial direction, in which the brush has a shorter wear length due to the radial commutator.
- the first and at least second strand is formed in the radial direction parallel to the spring in the brush.
- the first and second heddles are in the radial direction in front of and behind the spring in a first and second brush. trained.
- the first and at least second strand is thus arranged in parallel in front of and behind the at least one spring.
- the dimensions, in particular of the first and second strand are smaller than in the case of a brush device with a stranded wire.
- the total cross section of all strands in the brush may preferably be greater than a cross section of a single strand according to the prior art.
- a larger overall cross-section provides improved heat dissipation, as well as improved current sinking during peak times, thus extending service life.
- the brush device is advantageously designed to be exchangeable.
- more than one spring can press the brush in the brush holder to the commutator. This creates a more homogeneous contact pressure with an improved life, because the spring rate C can be made smaller.
- Fig. 1 is a schematic side view of a brush device.
- FIG. 1 shows a schematic side view of a brush device 1 according to the invention with a brush holder 2, in which a brush 3 is accommodated.
- the brush 3 is biased by a spring 4 against the commutator 5 and is pressed against this.
- the brush 3 has in the radial direction R to the spring 4 arranged in parallel brush projections 6, 7, which are arranged in the direction of the axis A in front of and behind the spring 4.
- the brush attachments 6, 7, according to a production method according to the invention at least two strands, a first strand 8 and a second strand 9 are pressed together with the brush 3.
- the first and second braid 8, 9 have a smaller cross section than a single prior art braid 10, which is arranged in the radial direction serially under the spring 4 in the brush 3.
- the strand 10 is shown in dashed line, since it represents the prior art and not the embodiment of the invention.
- the cross section of the first and second strand 8, 9 together is greater than the cross section of a single strand 10.
- the Ver Wear length of the wear limit V GS ⁇ which is shown by a dashed line is increased to the wear limit V G i according to the invention.
- the strands 8, 9 according to the invention for example, each have a cross section of 2.5 mm 2 , while in a conventional stranded wire 10, the cross section 4 mm 2 is large.
- An electric machine with a brush device 1 according to the invention has a longer service life with longer running times and increased switching cycles due to the increased wear length of the brushes 3.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Current Collectors (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/734,301 US20120025666A1 (en) | 2007-10-24 | 2008-09-26 | Brush device having a litz wire for an electric machine |
CN200880113095A CN101836347A (zh) | 2007-10-24 | 2008-09-26 | 用于电机的带绞合线的电刷装置 |
EP08804818A EP2206221B1 (de) | 2007-10-24 | 2008-09-26 | Bürstenvorrichtung mit einer litze für eine elektromaschine |
PL08804818T PL2206221T3 (pl) | 2007-10-24 | 2008-09-26 | Urządzenie szczotkowe z przewodem licowym dla maszyny elektrycznej |
JP2010530385A JP2011501647A (ja) | 2007-10-24 | 2008-09-26 | 電気機械のためのリッツ線を有するブラシ装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007051125.8 | 2007-10-24 | ||
DE102007051125A DE102007051125A1 (de) | 2007-10-24 | 2007-10-24 | Bürstenvorrichtung mit einer Litze für eine Elektromaschine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009053214A1 true WO2009053214A1 (de) | 2009-04-30 |
Family
ID=40220212
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/062944 WO2009053214A1 (de) | 2007-10-24 | 2008-09-26 | Bürstenvorrichtung mit einer litze für eine elektromaschine |
Country Status (8)
Country | Link |
---|---|
US (1) | US20120025666A1 (de) |
EP (1) | EP2206221B1 (de) |
JP (1) | JP2011501647A (de) |
KR (1) | KR20100076988A (de) |
CN (1) | CN101836347A (de) |
DE (1) | DE102007051125A1 (de) |
PL (1) | PL2206221T3 (de) |
WO (1) | WO2009053214A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2996368B1 (fr) * | 2012-09-28 | 2015-11-13 | Valeo Equip Electr Moteur | Balai de machine electrique et porte-balais correspondant |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1291731A (fr) * | 1961-03-13 | 1962-04-27 | Ferraz & Cie Lucien | Perfectionnements aux porte-balais pour machines électriques |
US3864803A (en) * | 1974-02-14 | 1975-02-11 | Gen Electric | Cartridge brush holder |
DE7035357U (de) * | 1970-09-24 | 1975-02-13 | Kollektra Metall Kunststoff | Klemmstueck oder lineal zur befestigung von buersten-steckerstiften. |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1629875A (en) * | 1921-04-20 | 1927-05-24 | Nat Carbon Co Inc | Pigtail connection for brushes |
US1844174A (en) * | 1928-05-18 | 1932-02-09 | Horace D Munday | Brush holder device for truing commutators |
US3445704A (en) * | 1967-12-26 | 1969-05-20 | Morganite Inc | Current collecting triple wafer brush assembly |
DE2350456A1 (de) | 1973-10-08 | 1975-04-10 | Bbc Brown Boveri & Cie | Buerstenhalter |
US4536670A (en) | 1981-12-14 | 1985-08-20 | Morganite Incorporated | Electrical brushes with wear sensors |
JPS6388067U (de) * | 1986-11-24 | 1988-06-08 | ||
JP2606362B2 (ja) * | 1989-04-20 | 1997-04-30 | 株式会社デンソー | 電動機用ブラシ |
DE19727118A1 (de) * | 1997-06-26 | 1999-01-28 | Bosch Gmbh Robert | Elektrische Antriebseinheit |
DE29903230U1 (de) * | 1999-02-23 | 1999-04-29 | Deutsche Carbone Ag, 60437 Frankfurt | Kohlebürste mit mindestens einer eingepreßten Kupferlitze |
JP2003079093A (ja) * | 2001-08-30 | 2003-03-14 | Asmo Co Ltd | ブラシ装置 |
DE10146568A1 (de) * | 2001-09-21 | 2003-04-17 | Bosch Gmbh Robert | Bürstenhalter für eine elektrische Maschine |
-
2007
- 2007-10-24 DE DE102007051125A patent/DE102007051125A1/de not_active Withdrawn
-
2008
- 2008-09-26 EP EP08804818A patent/EP2206221B1/de not_active Not-in-force
- 2008-09-26 KR KR1020107008927A patent/KR20100076988A/ko not_active Application Discontinuation
- 2008-09-26 WO PCT/EP2008/062944 patent/WO2009053214A1/de active Application Filing
- 2008-09-26 US US12/734,301 patent/US20120025666A1/en not_active Abandoned
- 2008-09-26 JP JP2010530385A patent/JP2011501647A/ja active Pending
- 2008-09-26 PL PL08804818T patent/PL2206221T3/pl unknown
- 2008-09-26 CN CN200880113095A patent/CN101836347A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1291731A (fr) * | 1961-03-13 | 1962-04-27 | Ferraz & Cie Lucien | Perfectionnements aux porte-balais pour machines électriques |
DE7035357U (de) * | 1970-09-24 | 1975-02-13 | Kollektra Metall Kunststoff | Klemmstueck oder lineal zur befestigung von buersten-steckerstiften. |
US3864803A (en) * | 1974-02-14 | 1975-02-11 | Gen Electric | Cartridge brush holder |
Also Published As
Publication number | Publication date |
---|---|
PL2206221T3 (pl) | 2013-06-28 |
KR20100076988A (ko) | 2010-07-06 |
JP2011501647A (ja) | 2011-01-06 |
US20120025666A1 (en) | 2012-02-02 |
DE102007051125A1 (de) | 2009-04-30 |
CN101836347A (zh) | 2010-09-15 |
EP2206221A1 (de) | 2010-07-14 |
EP2206221B1 (de) | 2013-01-09 |
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