EP1719217A1 - Balais pour moteurs electriques fonctionnant a haute temperature - Google Patents
Balais pour moteurs electriques fonctionnant a haute temperatureInfo
- Publication number
- EP1719217A1 EP1719217A1 EP05717532A EP05717532A EP1719217A1 EP 1719217 A1 EP1719217 A1 EP 1719217A1 EP 05717532 A EP05717532 A EP 05717532A EP 05717532 A EP05717532 A EP 05717532A EP 1719217 A1 EP1719217 A1 EP 1719217A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- particles
- mixture
- typically
- copper
- metal
- 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
- 239000002245 particle Substances 0.000 claims abstract description 67
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 62
- 229910052802 copper Inorganic materials 0.000 claims abstract description 62
- 239000010949 copper Substances 0.000 claims abstract description 62
- 239000000203 mixture Substances 0.000 claims abstract description 39
- 229910052751 metal Inorganic materials 0.000 claims abstract description 36
- 239000002184 metal Substances 0.000 claims abstract description 36
- 239000011230 binding agent Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 12
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 claims abstract description 10
- 239000011667 zinc carbonate Substances 0.000 claims abstract description 10
- 229910000010 zinc carbonate Inorganic materials 0.000 claims abstract description 10
- 235000004416 zinc carbonate Nutrition 0.000 claims abstract description 10
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 6
- 229920001342 Bakelite® Polymers 0.000 claims abstract description 4
- 239000004637 bakelite Substances 0.000 claims abstract description 4
- 229910021382 natural graphite Inorganic materials 0.000 claims abstract description 4
- 229920005989 resin Polymers 0.000 claims abstract description 4
- 239000011347 resin Substances 0.000 claims abstract description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 17
- 239000011701 zinc Substances 0.000 claims description 17
- 229910052725 zinc Inorganic materials 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 9
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 9
- 229910052748 manganese Inorganic materials 0.000 claims description 9
- 239000011572 manganese Substances 0.000 claims description 9
- 239000011135 tin Substances 0.000 claims description 9
- 229910052718 tin Inorganic materials 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 239000000571 coke Substances 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000010411 cooking Methods 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 239000002923 metal particle Substances 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 2
- 239000004952 Polyamide Substances 0.000 claims description 2
- 150000002431 hydrogen Chemical class 0.000 claims description 2
- 238000004898 kneading Methods 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- -1 polyethylene terephthalate Polymers 0.000 claims description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 2
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims 2
- 239000011787 zinc oxide Substances 0.000 claims 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims 1
- 239000013528 metallic particle Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 238000001000 micrograph Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 4
- 239000007858 starting material Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 229910052961 molybdenite Inorganic materials 0.000 description 2
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 125000005587 carbonate group Chemical group 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000004804 winding Methods 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
- H01R39/22—Contacts for co-operation with commutator or slip-ring, e.g. contact brush characterised by the material thereof incorporating lubricating or polishing ingredient
-
- 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 brushes for electric motors, more particularly those used to operate the equipment mounted on board automobiles (motor fans (independent fans fixed directly to the radiator) and other fans, alternators, auxiliary motors, etc.), for which high efficiency is sought.
- motor fans independent fans fixed directly to the radiator
- alternators alternators
- auxiliary motors etc.
- Such electric motors operate at low voltage with a high current. Because of this high current, the brushes equipping these motors must ensure an electrical contact rubbing at high temperature, typically greater than 100 ° C., or even greater than 200 ° C., with a current density greater than 15 A / cm 2.
- the on-board electric motors concerned by the invention have completely different operating conditions from those of the starters.
- the starters are called to operate a hundred thousand times for a few milliseconds under current densities greater than 500 A / cm2.
- Application US2003 / 0135993 describes brushes suitable for such operating conditions. They are certainly subjected to violent stresses but they work very little in cumulative time and therefore heat up little during the short period when they work.
- engines such as motor fans, placed under the hoods of vehicles, subjected to increasingly high temperatures, work continuously, i.e. as long as the heat engine is running. They work at lower current densities, typically below 50 A / cm2, but they are subjected to Joule heating and must operate at high temperatures, above 100 ° C, or even above 200 ° C during the operating life of a motor vehicle, namely several thousand hours, typically more than 2000 hours.
- the brushes for electric motors of equipment mounted on board automobiles are generally made up of a mixture of copper particles and graphoid particles.
- Copper particles can come from various origins: electrolytic copper (copper obtained by electrolytic deposition on a cathode, the anode being pure copper, the electrolyte typically being a mixture of copper sulphate, sulfuric acid and additives), atomized copper (molten copper dispersed in the form of fine droplets under the effect of a violent gas or liquid jet) or pounded copper (ground atomized copper in the form of fine lamellae).
- electrolytic copper copper obtained by electrolytic deposition on a cathode, the anode being pure copper, the electrolyte typically being a mixture of copper sulphate, sulfuric acid and additives
- atomized copper molten copper dispersed in the form of fine droplets under the effect of a violent gas or liquid jet
- pounded copper ground atomized copper in the form of fine lamellae
- Graphoids include various graphites, generally natural graphites, and organic binders.
- the mixture thus formed is treated hot and then ground to obtain the graphoid particles.
- generally conductive abrasives are added, typically carbides - for example carbide of silicon, or cokes, and solid lubricants, typically molydene disulfide (MoS 2 ).
- MoS 2 molydene disulfide
- the Applicant has therefore sought to develop a method making it possible to obtain a brush material for an electric motor which has improved wear resistance when the motor operates at a temperature above 100 ° C., typically close to 150 ° C., while allowing said engine to present a substantially constant performance throughout its lifetime.
- the cumulative operating time of the motors concerned 25 can range from a few hours (window winders, windscreen wipers) to more than 2000 hours (motor fans).
- a first object of the invention is a sliding contact piece transmitting an electric current of high density, typically greater than 15 A / cm 2 and less than 50 A / cm2, comprising copper particles, graphoid particles, resulting from the grinding of a mixture of graphite particles, preferably natural graphite, and organic binders, characterized in that, for transmitting said current for at least 2000 hours at a temperature above 100 ° C, typically close to 150 ° C, said contact part comprises copper particles whose weight percentage is between 20% and 60% and also particles comprising, under form of metal or compound of said metal, an additional metal belonging to the group consisting of the following elements: zinc, manganese and tin.
- the sliding contact piece capable of transmitting an electric current is a current-conducting friction element, such as a brush for an electric motor.
- the current density transmitted through the contact can be greater than 15 A / cm 2 .
- the envisaged application corresponds to small electric motors on board an automobile such as motor-fans, fans, alternators, etc. which operate with a current whose intensity, typically less than 50 A / cm 2 , is less than that which is necessary to operate a starter, typically greater than 100 A / cm 2 .
- the average value of the density of the current which feeds these motors is constantly increasing to meet the increasing power requirements, which have so far been less than one kilowatt. Such motors must be supplied without interruption, which results in an increasingly high operating temperature.
- the conditions used to test the endurance of the materials constituting brushes for electric motors are as follows: the brush must transmit for 2000 hours a current density of 25 A / cm 2 , the ambient temperature in the motor being close to 150 ° C.
- a fairly high copper content by weight is preferably chosen, typically of the order of 30%, between 20% and 60%, preferably between 20% and 30%.
- the material resulting from the mixture generally has a low electrical resistivity (AG resistivity or "against grain", that is to say in the direction perpendicular to the largest dimension of the grains), however greater than 200 ⁇ cm (2 10 " 6 ⁇ m) but to remain typically less than 10,000 ⁇ cm (10 "4 ⁇ m), preferably less than 5000 ⁇ cm (5 10 -5 ⁇ m), after 2000 hours of use at 150 ° C.
- AG resistivity or "against grain” that is to say in the direction perpendicular to the largest dimension of the grains
- the copper particles can be obtained by mixing particles of various origins (electrolytic copper, atomized copper, pounded copper) and which have an apparent density typically between 0.3 g / cm 3 and 4 g / cm 3 .
- electrolytic copper is used, with an apparent density between 0.6 and 0.9 g / cm 3 or a mixture of particles of electrolytic copper (65% to 100% by weight) and pounded copper (apparent density included between 0.9 and 1.2 g / cm 3 ) (0% to 35% by weight).
- the graphoids preferably comprise natural graphites, and organic binders, preferably of the phenolic type or based on polyamides or else on polyethylene terephthalate.
- the solid lubricant, typically molybdenum disulfide can be included in the composition of the graphoid.
- a conductive abrasive is added to the copper + graphoid mixture, preferably a mixture of coke and silicon carbide and an additional metal belonging to the group consisting of metals and alloys based on zinc, manganese or tin.
- Said additional metal is added to the material in the form of metal particles or in the form of a compound of said metal, preferably unstable at the firing temperature of the mixture.
- an oxide, a carbonate or a sulfate will preferably be chosen for zinc.
- the weight content in this said additional metal is advantageously between 0.1% and 20%, preferably between 0.5 and 10%.
- Another object of the invention is a method of manufacturing a sliding contact part capable of transmitting an electric current of high density, typically greater than 15 A / cm 2 and less than 50 A / cm 2 , comprising particles of copper and graphoid particles, resulting from the grinding of a mixture of graphite particles and organic binders, characterized in that: a) a mixture of copper particles, graphoid particles and particles comprising, in the form of of metal or of a compound of said metal, an additional metal belonging to the group consisting of the following elements: zinc, manganese and tin, the weight percentage of the copper particles being between 20% and 60%, the weight percentage of the graphoid particles being included between 45% and 75%, and the weight percentage of the additional metal or of its compound being between 0.5% and 20%.
- the particles thus mixed are brought to a cooking temperature between 250 ° C and 700 ° C, preferably between 250 ° C and 450 ° C, typically at a temperature close to 400 ° C, for a time between 0 , 5 and 10 hours, typically close to 4 hours, under a reducing gas atmosphere, comprising between 5% and 50% of hydrogen, the balance being nitrogen or a neutral gas, typically a mixture comprising 40% of hydrogen and 60% nitrogen.
- a cooking temperature between 250 ° C and 700 ° C, preferably between 250 ° C and 450 ° C, typically at a temperature close to 400 ° C, for a time between 0 , 5 and 10 hours, typically close to 4 hours, under a reducing gas atmosphere, comprising between 5% and 50% of hydrogen, the balance being nitrogen or a neutral gas, typically a mixture comprising 40% of hydrogen and 60% nitrogen.
- the graphoid itself results from the mixture of graphite, preferably natural, organic binder, preferably phenolic, typically a bakelite resin, and solid lubricant, typically molybdenum disulfide, the whole having been mixed preferably by kneading. wetland, the solvent then being evaporated and the powder crushed and sieved to obtain a particle size corresponding to a pass less than 630 ⁇ m, preferably between 90 and 355 ⁇ m.
- graphite preferably natural, organic binder, preferably phenolic, typically a bakelite resin
- solid lubricant typically molybdenum disulfide
- a conductive abrasive such as a mixture of silicon carbide and coke, in a proportion by weight typically comprised between 0.05% and 1%.
- the mixture thus obtained is brought to a cooking temperature of between 250 ° C and 700 ° C, preferably between 250 ° C and 450 ° C, typically, to about ten degrees, at a temperature close to 400 ° C, for a period of between 0.5 and 10 hours, typically close to 4 hours, under a reducing gas atmosphere, comprising between 5% and 50% of hydrogen and the additional nitrogen or neutral gas, typically a 40% mixture hydrogen and 60% nitrogen.
- Another object of the invention is the use of a sliding contact piece comprising copper particles, graphoid particles, the weight percentage of the copper particles being between 20% and 60%, said contact piece comprising also particles comprising, in the form of a metal or a compound of said metal, an additional metal belonging to the group consisting of the following elements: zinc, manganese and tin, characterized in that said part is used as a brush of an electric current motor continuous fitted to a motor vehicle - such as a fan, a window regulator motor, a wiper motor or an alternator - and operating under an electric voltage less than or equal to 60 volts, said part transmitting an electric current of density greater than 15 A / cm 2 and less than 50 A / cm 2 and being able to transmit said current for 2000 hours at a higher ambient temperature less than 100 ° C, typically around 150 ° C
- Another object of the invention is a method of manufacturing an electric collector motor, typically a direct current motor, which comprises a) the production of a frame on which an inductor is fixed,
- sliding electrical contacts which include particles of copper, whose weight proportion is between 20% and 60%, particles of graphoids, resulting from the grinding of a mixture of particles of graphites and organic binders, and also particles comprising, in the form of a metal or a compound of said metal, a metal belonging to the group consisting of the following elements: zinc, manganese and tin.
- FIG. 1 a illustrates a micrograph of a brush made of a material outside the invention which has operated at 150 ° C. for 620 hours: copper particles ⁇ pp ⁇ r ⁇ issent strongly oxidized.
- Figure 1b shows schematically the ranges observed on the micrograph of Figure la.
- FIG. 2a illustrates a micrograph of a brush made of a material similar to the material of FIG. 1 but to which particles of an additional metal according to the invention have been added.
- Figure 2b shows schematically the ranges observed on the micrograph of Figure 2a.
- the brush also operated at 150 ° C for 620 hours: the copper particles do not appear to be particularly oxidized.
- FIG. 3 illustrates, by grouping together the results of the measurements on the same graph, the evolution over time of the electrical resistivity AG of several brush materials.
- EXAMPLE 1 Observation of the oxidation of copper on two shades, one without zinc, the other with 2% zinc carbonate ( Figures 1 and 2)
- Figures 1 and 2 We produced a powder (shade XI) containing o 34% of copper by weight (mixture of low apparent density electrolytic copper and pounded copper), o 2% zinc carbonate, o 2% molybdenum disulphide MoS2, o 0.4% abrasive (mixture of coke and silicon carbide ) o and 61.6% graphoid.
- the graphoid is a premix. It includes 86% natural graphite, 5% MoS2 and 9% bakelite resin.
- grade X2 With the same components as those mentioned above, present with the same amounts in the mixture, with the exception of zinc carbonate.
- This shade X2 corresponds to the shade usually proposed by the applicant for motorized fan motors before the present invention.
- the shade Yl. contains 48% copper and 0% zinc.
- the Y2 grade contains 52% copper and 3% zinc carbonate.
- the Y3 grade contains 48% copper and 1% zinc carbonate.
- the AG resistivity of the grade Yl which does not contain zinc, increases very quickly over time: it exceeds 10,000 ⁇ cm after 500 hours of operation at 155 ° C.
- the resistivity of grade Y3, which contains 1% zinc carbonate changes less rapidly.
- certain samples Y3.1 for example
- see their resistivity evolving too quickly so that it is not possible to guarantee that the resistivity of this grade will not exceed 10,000 ⁇ cm after 2000 hours at 150 ° C.
- the resistivity of grade Y2, which contains 3% zinc carbonate is clearly more stable over time, which allows it not to exceed 10,000 ⁇ cm after 2000 hours at 150 ° C.
Landscapes
- Motor Or Generator Current Collectors (AREA)
- Plural Heterocyclic Compounds (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Protection Of Generators And Motors (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0401060A FR2865858B1 (fr) | 2004-02-04 | 2004-02-04 | Balais pour moteurs electriques fonctionnant a haute temperature |
| PCT/FR2005/000220 WO2005086297A1 (fr) | 2004-02-04 | 2005-02-02 | Balais pour moteurs electriques fonctionnant a haute temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1719217A1 true EP1719217A1 (fr) | 2006-11-08 |
| EP1719217B1 EP1719217B1 (fr) | 2007-12-12 |
Family
ID=34746412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05717532A Expired - Lifetime EP1719217B1 (fr) | 2004-02-04 | 2005-02-02 | Balais pour moteurs électriques fonctionnant à haute température |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1719217B1 (fr) |
| AT (1) | ATE381130T1 (fr) |
| DE (1) | DE602005003798T2 (fr) |
| ES (1) | ES2299017T3 (fr) |
| FR (1) | FR2865858B1 (fr) |
| WO (1) | WO2005086297A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004481B (zh) * | 2018-07-24 | 2019-12-17 | 美尔森哈碳电碳(哈尔滨)有限公司 | 一种接地电刷及其制备方法 |
| CN112701549B (zh) * | 2020-12-15 | 2022-05-10 | 美尔森哈碳电碳(哈尔滨)有限公司 | 一种风力发电电刷及其制备方法 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4204407A1 (de) * | 1992-02-14 | 1992-07-16 | Tech In Technologien Fuer Kuns | Niederohmige kommutierungsbuersten |
| FR2734669B1 (fr) * | 1995-05-22 | 1997-06-20 | Le Carbonne Lorraine | Bagues d'alternateurs et collecteurs cylindriques en materiau composite cupro-graphitique fritee |
| DE10201923B4 (de) * | 2002-01-19 | 2006-05-24 | Deutsche Carbone Ag | Verfahren zur Herstellung eines Gleitkontaktstücks für mittlere bis hohe Stromdichten |
-
2004
- 2004-02-04 FR FR0401060A patent/FR2865858B1/fr not_active Expired - Lifetime
-
2005
- 2005-02-02 WO PCT/FR2005/000220 patent/WO2005086297A1/fr not_active Ceased
- 2005-02-02 EP EP05717532A patent/EP1719217B1/fr not_active Expired - Lifetime
- 2005-02-02 AT AT05717532T patent/ATE381130T1/de not_active IP Right Cessation
- 2005-02-02 ES ES05717532T patent/ES2299017T3/es not_active Expired - Lifetime
- 2005-02-02 DE DE602005003798T patent/DE602005003798T2/de not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2005086297A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2299017T3 (es) | 2008-05-16 |
| EP1719217B1 (fr) | 2007-12-12 |
| DE602005003798D1 (de) | 2008-01-24 |
| DE602005003798T2 (de) | 2008-12-24 |
| FR2865858A1 (fr) | 2005-08-05 |
| ATE381130T1 (de) | 2007-12-15 |
| FR2865858B1 (fr) | 2016-10-07 |
| WO2005086297A1 (fr) | 2005-09-15 |
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