EP1935064A1 - Corps de bague collectrice pour le transfert de courant continu - Google Patents

Corps de bague collectrice pour le transfert de courant continu

Info

Publication number
EP1935064A1
EP1935064A1 EP06806060A EP06806060A EP1935064A1 EP 1935064 A1 EP1935064 A1 EP 1935064A1 EP 06806060 A EP06806060 A EP 06806060A EP 06806060 A EP06806060 A EP 06806060A EP 1935064 A1 EP1935064 A1 EP 1935064A1
Authority
EP
European Patent Office
Prior art keywords
slip ring
nickel
gold
ring body
contact surface
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.)
Withdrawn
Application number
EP06806060A
Other languages
German (de)
English (en)
Inventor
Bernd Gehlert
Rolf Paulsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heraeus Deutschland GmbH and Co KG
Original Assignee
WC Heraus GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by WC Heraus GmbH and Co KG filed Critical WC Heraus GmbH and Co KG
Publication of EP1935064A1 publication Critical patent/EP1935064A1/fr
Withdrawn legal-status Critical Current

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
    • H01R39/022—Details for dynamo electric machines characterised by the materials used, e.g. ceramics
    • H01R39/025—Conductive materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6691—Structural association with built-in electrical component with built-in electronic circuit with built-in signalling means
    • 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
    • H01R39/08—Slip-rings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y10T29/49011—Commutator or slip ring assembly

Definitions

  • the present invention relates to slip ring bodies for slip ring transformers for continuous power transmission and a galvanic process for their preparation.
  • Rotary current transformers with contact systems made of stainless steel or precious metal coatings are mainly used when high demands are placed on the quality (voltage fluctuation during rotation) of the current transmission, service life and ease of maintenance. There is a distinction between sliding contacts with and without power interruption:
  • Typical designs for continuous power transmission are cylindrical slip ring transformers or flat transmission systems with printed circuit boards.
  • the electrical load spectrum ranges from data ( ⁇ 1A) to power transmission (100-500A).
  • For transferring higher currents (> 2A) depending on the application, several precious metal sliding contacts are arranged in parallel on a grinding path.
  • load currents of up to 500 A can be transmitted.
  • a simple gold-cobalt plating on a nickel-plated copper-based support exhibits variations in voltage drop and thus interferes with transmission performance. After about 3 to 5 million revolutions, the voltage drop increases very significantly, so that the slip ring is no longer useful.
  • Galvanic layer systems have at least two different layers on a support.
  • Conventional galvanic layer systems for power transmission have on a brass substrate on an approximately 0.5 micron thick copper layer and applied thereto 2 to 5 microns thick nickel layer on which in turn a gold-copper-cadmium layer is applied in a thickness of 5 to 15 microns , With this layer system, a longer service life is achieved compared to simple galvanic layers on a carrier. However, a significantly increased voltage drop is tolerated compared to a simple gold-cobalt coating. In addition, cadmium is undesirable for environmental or health reasons.
  • the sliding contact surface on a hard base is made thinner than hitherto usual. This allows the voltage drop with previously unattainable quality (variations in voltage drop) to 5 000 000 revolutions to a constant value well below 0.5 V at 2 A to lower. In the course to at least 10 000 000 revolutions is still at least as good a quality achieved, as was previously achievable in the prior art for the first 1 000 000 revolutions.
  • the hardness must in any case be higher than the hardness of the nickel previously used as a diffusion barrier layer. Platinum group metals and phosphorus doped nickel have sufficient hardness for the present invention.
  • the slip ring transformers according to the invention are suitable for all applications of electrical energy and data transmission for rotating systems, in particular wind turbines, robots, welding robots, cable drums and radar systems, for all of which a permanently routed electrical connection would be unusable.
  • the layer thickness of the sliding contact surface made of gold or a hard gold alloy is significantly reduced. According to the invention, not only a considerable reduction of the gold consumption is made possible, but also a prolonged duration.
  • the present invention enables a reduction of the suitable depending on the application layer thickness of the sliding contact surface of gold or hard gold by at least 30%, in particular by at least 50%.
  • Layer thicknesses of less than 10 .mu.m, in particular 1 to 5 .mu.m, preferably 2 to 3 .mu.m, have proven successful, in particular when using noble metal grinder wires made of Hera 277 (AuPdAg alloy). Over 15 microns, the gold order is increasingly uneconomical.
  • the abrasion determines a minimum layer thickness with regard to the service life.
  • the sliding contact surface of a sliding contact track is expediently web-shaped.
  • the web may be disposed axially on the surface of a disk or radially on the outside of a ring.
  • the sliding contact surface as a web on a sliding contact disk is usefully disc-shaped. On a disc, several tracks can be arranged radially next to each other. Circuit boards have proven themselves for this design.
  • the sliding contact surface as a track on a sliding contact ring is usefully ring-shaped.
  • Several rings can be arranged axially on one axis.
  • Sliding contact surfaces made of a gold alloy, which has cobalt or nickel, have proven successful.
  • Suitable gold-cobalt alloys or gold-nickel alloys have 50 to 99.8% by weight of gold, 0.2 to 20% by weight of cobalt or nickel, and 0 to 30% of other alloying constituents.
  • Other noble metals, copper and dopants with boron, carbon, silicon or phosphorus are suitable as further alloy constituents.
  • the supporting base in particular an intermediate layer arranged on a nickel-plated carrier, consists of a hard material which supports the sliding contact surface, in particular the hardest material of the composite.
  • a supporting base in particular an intermediate layer made of one or more platinum group metals (PGM) or alloys thereof or hardened nickel, has proved suitable.
  • PGM platinum group metals
  • a galvanic Pd deposition on a nickel-plated carrier has proved successful from a copper alloy such as brass, bronze or CuZr. To a limited extent, platinum group metals can be replaced by ferrous metals.
  • a doping with B, C, Si, or P increases the hardness.
  • a diffusion barrier layer of nickel the harder intermediate layer. If the intermediate layer of phosphorus-hardened nickel is carried out, the platinum group metals can be saved.
  • a copper-based support e.g. Brass arranged a diffusion barrier layer of nickel.
  • An intermediate layer of phosphorus-hardened nickel is deposited on the nickel diffusion barrier layer.
  • a nickel-containing hard gold layer is applied as a sliding contact surface.
  • the electrically conductive composite of sliding contact surface and the supporting intermediate layer in a thickness between 3 and 10 .mu.m, in particular between 4 and 8 microns and more preferably between 5 and 7 microns.
  • the electrically conductive carrier is preferably a copper alloy.
  • Proven copper alloys for continuous power transmission include zinc (brass), tin (bronze) or zirconium.
  • the supporting base may be separated from the sliding contact surface by a thin layer, for example a diffusion barrier layer or an adhesion promoter. It is recommended that such a layer does not run over 1 micron thickness, since with increasing layer thickness of the thin layer, the supporting function of the supporting base is impaired.
  • a thin layer for example a diffusion barrier layer or an adhesion promoter. It is recommended that such a layer does not run over 1 micron thickness, since with increasing layer thickness of the thin layer, the supporting function of the supporting base is impaired.
  • the sliding contact surface with hardened underlay according to the invention is used as the surface of a slip ring transmitter (in particular in wind turbines or industrial robots) for the transmission of control signals, control and generator currents.
  • a slip ring transmitter in particular in wind turbines or industrial robots
  • FIG. 1 shows the voltage drop as a function of the revolutions for the sliding contact surface according to the invention
  • FIG. 2 shows an oscillogram at the beginning of the current transmission in accordance with the invention
  • Figure 3 shows an oscillogram after 4,000,000 revolutions
  • Figure 4 shows an oscillogram after 10 000 000 revolutions
  • Figs. 5a and 5b show slipring assemblies
  • FIG. 6 shows a test arrangement for determining the voltage drop and the quality
  • FIGS. 7 to 9 show comparative diagrams to FIG. 1;
  • FIGS. 10 to 12 show comparison oscillograms to FIG. 2;
  • Figs. 13 to 15 show comparative oscillograms to Fig. 3;
  • Figures 16 to 18 show comparative oscillograms to Figure 4.
  • a current transformer is designed as a ring, wherein the sliding contact surface is arranged on the outer surface of the ring.
  • 2 .mu.m nickel are galvanically deposited on the outside of a brass or bronze ring and then 5 .mu.m nickel phosphorus.
  • the nickel-phosphorus layer the nickel is doped with phosphorus, making the layer significantly harder than the nickel layer underlying the nickel-phosphorus layer.
  • 4 ⁇ m of a gold-nickel alloy are deposited galvanically on the phosphorus-doped nickel layer. Compared to a slip ring without hardened nickel layer better quality of power transmission and higher wear resistance is achieved.
  • a brass ring is galvanically provided on its outside with a 4 ⁇ m nickel layer. On this nickel layer, a 5 .mu.m thick palladium layer is applied galvanically. On the palladium layer, a hard gold alloy of gold and cobalt is applied in a thickness of 5 microns.
  • the current transformer produced in this way is evaluated in an arrangement according to FIG. The two wiper wires are driven on different tracks.
  • the sliding contact consists of Hera 277 (AuAgPd alloy).
  • the voltage drop is shown at the beginning of the experiment.
  • the oscillogram according to FIG. 2 shows the voltage drop after 4 million revolutions and the oscillogram according to FIG. 3 shows the voltage drop after 10 million revolutions.
  • the trigger signal is recorded as a square pulse.
  • the zero line for the voltage signal is always the top line of the second box from below.
  • the voltage drop as a function of the revolutions is shown in the diagram according to FIG.
  • the dotted line represents the upper value from the oscillograms, the dotted line the lower and the solid line the average.
  • a plurality of slider tracks can be arranged radially on a disk.
  • the disc is similarly coated on one of the disc surfaces, as previously described for the outer surfaces of the rings.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Contacts (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Wind Motors (AREA)

Abstract

L'invention concerne un corps de bague collectrice qui est constitué d'un matériau support et d'une surface de contact par frottement en or ou en alliage d'or et dont la surface de contact par frottement est stabilisée au moyen d'une base d'appui. L'invention concerne également l'utilisation d'un corps de bague collectrice pour des collecteurs de courant à bague collectrice (notamment dans des éoliennes ou des robots industriels) servant à transférer des signaux de commande et des courants de commande et de générateur. On allonge ainsi la durée de vie, tout en améliorant la qualité, en réduisant les chutes de tension et en économisant significativement sur l'or.
EP06806060A 2005-10-05 2006-10-05 Corps de bague collectrice pour le transfert de courant continu Withdrawn EP1935064A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005047799A DE102005047799A1 (de) 2005-10-05 2005-10-05 Schleifringkörper zur kontinuierlichen Stromübertragung
PCT/EP2006/009651 WO2007039302A1 (fr) 2005-10-05 2006-10-05 Corps de bague collectrice pour le transfert de courant continu

Publications (1)

Publication Number Publication Date
EP1935064A1 true EP1935064A1 (fr) 2008-06-25

Family

ID=37634194

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06806060A Withdrawn EP1935064A1 (fr) 2005-10-05 2006-10-05 Corps de bague collectrice pour le transfert de courant continu

Country Status (6)

Country Link
US (1) US20090058219A1 (fr)
EP (1) EP1935064A1 (fr)
JP (1) JP2009533544A (fr)
CN (1) CN101278449A (fr)
DE (1) DE102005047799A1 (fr)
WO (1) WO2007039302A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010048189B4 (de) * 2010-10-13 2012-11-15 Heraeus Materials Technology Gmbh & Co. Kg Edelmetallhaltiges Kontaktstück auf einem Federträger mit rotationssymmetrischem Biegemoment
DE102011015579B4 (de) * 2011-03-30 2017-03-23 Heraeus Deutschland GmbH & Co. KG Elastischer Schleifkontakt und Verfahren zu dessen Herstellung
CN103460524A (zh) * 2011-04-04 2013-12-18 Gat传动技术有限公司 用于传输电信号的滑环
DE102011106518B4 (de) * 2011-06-15 2017-12-28 Heraeus Deutschland GmbH & Co. KG Draht für Schleifkontakte und Schleifkontakte
EP3605751B1 (fr) * 2013-08-16 2021-10-06 Schleifring GmbH Ensemble de bague collectrice et composants associés
CN113394637B (zh) * 2021-05-31 2023-09-01 扬州海通电子科技有限公司 一种多接触模块滑环的电流分布调节方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5066550A (en) * 1989-07-27 1991-11-19 Yazaki Corporation Electric contact

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5469704A (en) * 1977-11-15 1979-06-05 Matsushita Electric Works Ltd Commutating device for motor
US4337133A (en) * 1979-06-20 1982-06-29 Bell Telephone Laboratories, Incorporated Hard gold surfaces
US4281328A (en) * 1980-01-28 1981-07-28 General Dynamics, Pomona Division Slip ring assembly
JPS595581A (ja) * 1982-06-30 1984-01-12 田中貴金属工業株式会社 整流子用接触片材料
US4480014A (en) * 1983-10-26 1984-10-30 At&T Technologies, Inc. Electrical contact means with gold-nickel alloy overlay
DD221885A1 (de) * 1983-11-29 1985-05-02 Elektromasch Forsch Entw Elektrischer gleitkontakt, insbesondere fuer kommutierungssysteme
DE3476684D1 (en) * 1984-05-11 1989-03-16 Burlington Industries Inc Amorphous transition metal alloy, thin gold coated, electrical contact
GB2186597B (en) * 1986-02-17 1990-04-04 Plessey Co Plc Electrical contact surface coating
IN166545B (fr) * 1986-06-30 1990-06-02 Siemens Ag
JP2992622B2 (ja) * 1990-12-29 1999-12-20 株式会社徳力本店 摺動接触材料
US6984915B2 (en) * 2002-01-22 2006-01-10 Electro-Tec Corp. Electrical slip ring platter multilayer printed circuit board and method for making same
JP4362599B2 (ja) * 2004-03-05 2009-11-11 Ｄｏｗａメタルテック株式会社 金属部材およびそれを用いた電気接点

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5066550A (en) * 1989-07-27 1991-11-19 Yazaki Corporation Electric contact

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2007039302A1 *

Also Published As

Publication number Publication date
WO2007039302A1 (fr) 2007-04-12
US20090058219A1 (en) 2009-03-05
JP2009533544A (ja) 2009-09-17
CN101278449A (zh) 2008-10-01
DE102005047799A1 (de) 2007-05-24

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