WO2005020390A1 - Piece de contact electrique glissant - Google Patents
Piece de contact electrique glissant Download PDFInfo
- Publication number
- WO2005020390A1 WO2005020390A1 PCT/FR2004/001987 FR2004001987W WO2005020390A1 WO 2005020390 A1 WO2005020390 A1 WO 2005020390A1 FR 2004001987 W FR2004001987 W FR 2004001987W WO 2005020390 A1 WO2005020390 A1 WO 2005020390A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- contact piece
- piece according
- iron
- weight
- based particles
- Prior art date
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910052742 iron Inorganic materials 0.000 claims abstract description 21
- 239000007858 starting material Substances 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 13
- 239000011701 zinc Substances 0.000 claims abstract description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052802 copper Inorganic materials 0.000 claims abstract description 9
- 239000010949 copper Substances 0.000 claims abstract description 9
- 239000010410 layer Substances 0.000 claims description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 239000010439 graphite Substances 0.000 claims description 7
- 238000005498 polishing Methods 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 2
- 150000001247 metal acetylides Chemical class 0.000 claims description 2
- 239000002356 single layer Substances 0.000 claims description 2
- 239000003575 carbonaceous material Substances 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 6
- 229910052787 antimony Inorganic materials 0.000 description 4
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 238000007792 addition Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 244000007853 Sarothamnus scoparius Species 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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
- H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
- H01R39/20—Contacts for co-operation with commutator or slip-ring, e.g. contact brush characterised by the material thereof
Definitions
- the invention relates to electrical sliding contact parts containing a carbonaceous material, typically graphite, and a metal or a metal alloy intended to increase the electrical conductivity, typically copper.
- the invention relates very particularly to electric contact brushes, in particular those which are used in starters.
- the sliding electrical contact parts may contain additions of lead or antimony in order to give them good damping properties, a low coefficient of friction on a contact element, such as a collector, and maintenance of performance in time.
- application FR 1 392967 suggests the use of materials containing, in addition to lead, manganese (example 1) or a tin + iron mixture (example 2).
- the subject of the invention is an electrical sliding contact part containing a carbon base and copper, characterized in that, free of lead, that is to say containing practically less than 0.05% by weight of lead, it contains in addition zinc and iron-based particles whose size is less than 500 ⁇ m.
- the Applicant attributes the performance of the contact parts according to the invention to the fact that the iron has polishing properties combined with a high electrical conductivity.
- the iron-based particles which typically contain more than 80% by weight of iron, may optionally contain one or more alloying elements.
- the carbon base preferably represents at least 20% by weight of the contact part. This proportion is typically between 30 and 80% by weight.
- the carbon base of the brush includes at least one carbon material, which can be carbon or preferably graphite.
- the contact piece according to the invention may optionally contain more than one carbon material, such as a mixture of graphite and amorphous carbon.
- the base carbonaceous contains at least 60% by weight of graphite.
- Graphite can be natural or artificial or a mixture of both.
- the proportion of iron-based particles in the composition of the contact piece is preferably between 1 and 15% by weight, and more preferably between 3 and 10% by weight.
- the size of the iron-based particles typically characterized by a D50, is advantageously less than 500 ⁇ m, preferably less than 200 ⁇ m, on the one hand to obtain a homogeneous distribution of the iron in the powder before compression and on the other hand to avoid the appearance of microcracks in the powder mixture after compression. It is also advantageously greater than 50 ⁇ m in order to improve the flowability of the powder mixture before compression.
- the proportion of zinc is preferably between 0.5 and 20% by weight, and more preferably between 1 and 10% by weight.
- the proportion of copper depends on the intended application. It is typically between 20 and 80% by weight.
- the contact piece according to the invention may optionally contain additives such as one or more lubricants or one or more polishing products (such as carbides or cokes).
- the contact piece according to the invention can be formed of several superimposed layers, that is to say that it can be multilayer, such as a bilayer.
- the sliding electrical contact piece according to the invention is advantageously used in an electric brush.
- the invention also relates to an electric brush, such as an electric motor or starter brush, comprising at least one sliding contact part according to the invention.
- the collector of electric motors and starters can be cylindrical or flat.
- the contact piece according to the invention is particularly suitable for b ⁇ l ⁇ is of motor vehicle starters.
- the brushes according to the invention can be made of a single material (monolayer) or of several materials (multilayer), with at least one layer, called conductive, made of a material having a low electrical resistivity and at least one layer, called switching, made of a material having a higher electrical resistivity. In the latter case, it is at least the material constituting the conductive layer which advantageously contains zinc and iron-based particles whose size is less than 500 ⁇ m.
- the contact parts according to the invention can be obtained by a process comprising: - the mixture of copper, zinc, iron, graphite powders and a binder; - The shaping of the contact piece, typically by compression in a mold; i5 - heat treatment of the part capable of causing it to cook.
- French patent application FR 2 709 61 1 describes a method for manufacturing multi-layer brushes capable of being used to obtain brushes according to the invention.
- FIG. 1 illustrates two-layer starter brushes according to the invention, seen in longitudinal section.
- FIG. 2 illustrates an electric motor brush according to the invention, seen in longitudinal section.
- An electric brush (1) typically comprises at least one contact piece (6) and a connection conductor (5), which is typically a flexible cable.
- the brush (1) may include means for electrically connecting the contact piece (6) to the connection conductor (5).
- the direction of rotation of the blades (10) of the collector (9) is given by the arrow R.
- the blades (10) "enter” from the side (7) called “entry” of the brush and “exit” from the side (8) called “exit” from the broom.
- a multilayer brush (1) comprises a contact part (6) which typically comprises at least a first layer (2) having a first conductivity, called high, and a second layer (3) having a second conductivity, called weak. These layers are arranged so that the plane of the interface (4) between them intercepts the blades (10) of the collector (9). This configuration makes it possible to avoid the formation of electric arcs during switching, that is to say when switching from one manifold blade to the next. Said interface is typically perpendicular to the plane tangent to the blades (10).
- connection conductor (5) is typically fixed in the high conductivity layer (2) of the brush, either directly (FIG. 1 A), either through the low conductivity layer (3) ( Figure 1 B).
- the proportion of copper in the high conductivity layer is typically between 50 and 70% by weight. It is typically between 2 and 30% by weight in the layer of low conductivity.
- the thickness of the layers depends on the type of starter. In automobile starters, the thickness of the high conductivity layer is typically between 3 and 6 mm; that of the layer of low conductivity is typically between 1 and 2 mm.
- a multilayer brush may also include two or more contiguous contact pieces. testing
- the brushes were multilayer brushes as illustrated in FIG. 1. With respect to the contact surface S on the manifold, the dimensions of the brushes were 18 mm in the radial direction, 11 mm in the axial direction and between 4 , 5 and 9.4 mm in the tangential direction.
- the collectors were flat (as shown in Figure 1).
- Table I gives the ranges of proportions by weight of each component used in the initial mixture of the first layer (2).
- the iron particles had a metal purity greater than 99% by weight.
- the additive consisted of common lubricants and polishers.
- the composition of the second layer (3) was similar to the first layer with a large difference in the proportion of copper, which was significantly lower in order to increase the resistivity of the layer.
- Table II gives the results of the measurements and tests carried out on these brushes. This table gives, for each test, the resistivity p measured, the speed of rotation of the collectors of the flat starters (corresponding to that of the drive pinion mounted on the shaft of the machine), an evaluation of the degradation of the contact, c i.e. an evaluation of the drop in performance after 20,000 cycles (by measuring the torque and the speed of rotation), and a evaluation of the "useful life” by a measurement of the number of cycles carried out on a brush so that it reaches a wear of 10 mm.
Landscapes
- Motor Or Generator Current Collectors (AREA)
- Contacts (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0413196-7A BRPI0413196A (pt) | 2003-08-01 | 2004-07-26 | peça de contato elétrico deslizante |
US10/566,702 US7525232B2 (en) | 2003-08-01 | 2004-07-26 | Sliding electrical contact part |
EP04767776A EP1654786A1 (fr) | 2003-08-01 | 2004-07-26 | Piece de contact electrique glissant |
JP2006521614A JP2007501491A (ja) | 2003-08-01 | 2004-07-26 | スライド式電気接触部品 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0309514A FR2858473A1 (fr) | 2003-08-01 | 2003-08-01 | Piece de contact electrique glissant |
FR0309514 | 2003-08-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005020390A1 true WO2005020390A1 (fr) | 2005-03-03 |
Family
ID=34043733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2004/001987 WO2005020390A1 (fr) | 2003-08-01 | 2004-07-26 | Piece de contact electrique glissant |
Country Status (6)
Country | Link |
---|---|
US (1) | US7525232B2 (fr) |
EP (1) | EP1654786A1 (fr) |
JP (1) | JP2007501491A (fr) |
BR (1) | BRPI0413196A (fr) |
FR (1) | FR2858473A1 (fr) |
WO (1) | WO2005020390A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7928629B2 (en) * | 2006-10-23 | 2011-04-19 | Asmo Co., Ltd. | Direct current motor |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007063333A1 (de) | 2007-12-27 | 2009-07-02 | Robert Bosch Gmbh | Mehrschichtbürste |
DE102009029687A1 (de) * | 2009-09-23 | 2011-03-24 | Robert Bosch Gmbh | Kommutator zur Stromübertragung in einer elektrischen Maschine |
KR20160024031A (ko) * | 2014-08-22 | 2016-03-04 | 현담산업 주식회사 | 2중 재질을 갖는 차량의 연료펌프용 브러쉬 구조 |
DE102021107839A1 (de) | 2021-03-29 | 2022-09-29 | Metabowerke Gmbh | Schichtkohlebürste für einen Elektromotor |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE478021C (de) * | 1923-03-15 | 1929-06-25 | Hartstoff Metall A G Hametag | Gleit- oder Schleifkoerper z. B. fuer Dynamobuersten aus auf mechanischem Wege zerkleinertem Metall, z. B. Kupfer oder Kupferlegierungen, und einer Beimischung von Graphit |
FR1392967A (fr) * | 1964-04-28 | 1965-03-19 | Morganite Carbon Ltd | Contact électrique et matériau pour ce contact |
FR2232847A1 (fr) * | 1973-06-09 | 1975-01-03 | Ringsdorff Werke Gmbh | |
EP0525222A1 (fr) * | 1991-07-22 | 1993-02-03 | Deutsche Carbone AG | Pièce de contact glissant pour densités de courant élevées |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US554369A (en) * | 1896-02-11 | Commutator-brush | ||
US1807794A (en) * | 1931-06-02 | Biuish ajjd current collector | ||
US1093614A (en) * | 1913-01-29 | 1914-04-21 | Gen Electric | Brush for dynamo-electric machines. |
GB1259454A (fr) * | 1968-05-23 | 1972-01-05 | ||
US5207504A (en) * | 1991-07-03 | 1993-05-04 | Swift Gerald R | Method and apparatus for tuning strip flourescent light fixtures |
DE60136877D1 (de) * | 2000-02-22 | 2009-01-22 | Denso Corp | Verfahren zu Herstellung einer Mehrschicht-Bürste für eine rotierende elektrische Maschine |
JP3797662B2 (ja) * | 2002-01-30 | 2006-07-19 | トライス株式会社 | 銅黒鉛質ブラシ |
GB0303752D0 (en) * | 2003-02-18 | 2003-03-26 | Morgan Crucible Co | Composite electrical brush construction |
-
2003
- 2003-08-01 FR FR0309514A patent/FR2858473A1/fr not_active Withdrawn
-
2004
- 2004-07-26 BR BRPI0413196-7A patent/BRPI0413196A/pt not_active IP Right Cessation
- 2004-07-26 WO PCT/FR2004/001987 patent/WO2005020390A1/fr active Search and Examination
- 2004-07-26 EP EP04767776A patent/EP1654786A1/fr not_active Withdrawn
- 2004-07-26 US US10/566,702 patent/US7525232B2/en not_active Expired - Fee Related
- 2004-07-26 JP JP2006521614A patent/JP2007501491A/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE478021C (de) * | 1923-03-15 | 1929-06-25 | Hartstoff Metall A G Hametag | Gleit- oder Schleifkoerper z. B. fuer Dynamobuersten aus auf mechanischem Wege zerkleinertem Metall, z. B. Kupfer oder Kupferlegierungen, und einer Beimischung von Graphit |
FR1392967A (fr) * | 1964-04-28 | 1965-03-19 | Morganite Carbon Ltd | Contact électrique et matériau pour ce contact |
FR2232847A1 (fr) * | 1973-06-09 | 1975-01-03 | Ringsdorff Werke Gmbh | |
EP0525222A1 (fr) * | 1991-07-22 | 1993-02-03 | Deutsche Carbone AG | Pièce de contact glissant pour densités de courant élevées |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7928629B2 (en) * | 2006-10-23 | 2011-04-19 | Asmo Co., Ltd. | Direct current motor |
Also Published As
Publication number | Publication date |
---|---|
BRPI0413196A (pt) | 2006-10-03 |
FR2858473A1 (fr) | 2005-02-04 |
US7525232B2 (en) | 2009-04-28 |
JP2007501491A (ja) | 2007-01-25 |
US20070042650A1 (en) | 2007-02-22 |
EP1654786A1 (fr) | 2006-05-10 |
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