EP1711985B1 - Bürstenköcher für eine Dynamo-elektrische Maschine - Google Patents

Bürstenköcher für eine Dynamo-elektrische Maschine Download PDF

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Publication number
EP1711985B1
EP1711985B1 EP05707879A EP05707879A EP1711985B1 EP 1711985 B1 EP1711985 B1 EP 1711985B1 EP 05707879 A EP05707879 A EP 05707879A EP 05707879 A EP05707879 A EP 05707879A EP 1711985 B1 EP1711985 B1 EP 1711985B1
Authority
EP
European Patent Office
Prior art keywords
brush
brush holder
guide region
commutator
holder
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.)
Active
Application number
EP05707879A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1711985A1 (de
Inventor
Jörg SKRIPPEK
Rainer Schach
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1711985A1 publication Critical patent/EP1711985A1/de
Application granted granted Critical
Publication of EP1711985B1 publication Critical patent/EP1711985B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00Rotary current collectors, distributors or interrupters
    • H01R39/02Details for dynamo electric machines
    • H01R39/38Brush holders
    • H01R39/40Brush holders enabling brush movement within holder during current collection
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00Rotary current collectors, distributors or interrupters
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00Rotary current collectors, distributors or interrupters
    • H01R39/02Details for dynamo electric machines
    • H01R39/18Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H01R39/26Solid sliding contacts, e.g. carbon brush
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/49009Dynamoelectric machine
    • Y10T29/49011Commutator or slip ring assembly

Definitions

  • the invention relates to a brush holder for a power transmission unit of a dynamo-electric machine having a commutator, in particular for an electric motor, wherein the brush holder, which is in particular made of metal, has guide regions for guiding a brush which can be displaced for longitudinal extension, which is designed in particular as a multilayer carbon brush. and there is a gap between the guide portions and the brush across the length of the brush.
  • the invention relates to a brush for the brush holder, a power transmission unit for a dynamo-electric machine with the brush holder and / or the brush or a dynamo-electric machine with such Stromübemagungsaku and a method for producing the brush holder.
  • the power transmission unit is a so-called sliding contact system, which ensures an electrical connection between a power supply or external connections of the dynamo-electric machine and windings of a rotor.
  • a sliding contact system which ensures an electrical connection between a power supply or external connections of the dynamo-electric machine and windings of a rotor.
  • an arrangement with spatially fixed brushes which usually consist of coal and are in sliding contact with a rotatable commutator provided.
  • the commutator consists of individual electrically conductive blades, which are connected to the windings of the rotor. On the slats, the brush slides along to make an electrical contact between the slats and brush.
  • a brush is slidably guided in a spatially fixed brush holder, which is also referred to as a brush guide or brush sleeve.
  • the brush is loaded in the direction of the commutator, ie in a radial direction, with a spring.
  • a substantially constant pressure force of the brush is ensured on the commutator.
  • the brush is tracked by the spring force within the brush holder to compensate for wear of the brush.
  • multi-layer carbon brushes are used in the known Stromübemagungsakuen.
  • Such multilayer carbon brushes have high-resistance or electrically non-conductive layers between individual carbon layers for reducing so-called cross-currents or short-circuit currents within the brush.
  • Such cross-currents can occur when a brush is in contact with two adjacent fins of the commutator or when a brush or individual brush layers come into contact with an electrically conductive brush holder such that a current can form across the brush.
  • Electrically conductive brush quivers which are usually made of metal, are frequently used in dynamo-electric machines because of their low-cost production.
  • such brush holder In order to avoid contact between the brush and the brush holder, whereby a cross-flow can form in the brush, such brush holder have a relatively large lateral clearance between the brush and the brush holder.
  • a carbon brush of an AC universal motor of a washing machine in its transverse extent is usually 0.04 to 0.05 mm narrower than the inner guide region of the carbon brush holder assigned in this transverse extension.
  • the relatively large clearance between the carbon brush and the carbon brush case is therefore 0.02 to 0.025 mm on both sides in such a case.
  • a disadvantage of the great game is that during operation of the dynamo-electric machine produces a noise. As soon as the brush strikes a lamellar edge, the brush strikes against the inner walls of the quiver. In this case, the brush strikes twice per blade.
  • a known solution to avoid noise provides, in addition to edit the lamellar commutator, for example, by so-called pimples or fine grinding.
  • pimples or fine grinding When reworking the commutator again dust particles that need to be removed consuming, so that these dust particles in turn can not cause a brush terminals.
  • a brush quiver which is particularly suitable for guiding multilayer carbon brushes and has a distance transversely to the carbon brush to be guided, is known from US Pat DE 101 57 604 A1 or the US-A-3983432 known.
  • the brush quiver is made of tinned sheet steel and covered with an insulating layer.
  • the insulation layer applied in the brush quiver serves to avoid a short-circuit current or cross-current between individual layers of a multilayer carbon brush.
  • a paint such as phenolic resin, epoxy resin or polystyrene is applied to the steel plate of the carbon brush holder. When using such Insulation between the carbon brush holder and the multilayer carbon brush, the clearance between the brush holder and the carbon brush can be tightly tolerated.
  • a disadvantage of the small game is that the brush dust that enters the gap, can accumulate in the space, causing the brush jammed in the brush holder or the layers of the brush are shorted by unburned brush dust. Moreover, such an insulating layer can not be stressed as much thermally and mechanically as a pure metal guide.
  • the invention is therefore based on the problem of designing a carbon brush holder and / or a carbon brush or a resulting power transmission unit for a dynamo-electric machine such that a brush of the power transmission unit does not cause any noise and / or no cross currents can form in the brush , Furthermore, a method for producing a corresponding brush holder is to be provided.
  • the power transmission unit should be such that no cross currents are caused in the brush by the brush dust generated during operation or the brush can not jam in the brush holder, and on the other hand, the power transmission unit or its components are inexpensive and easy to produce.
  • this object is achieved by the features of claim 1 of a brush holder, the independent claim 10 a carbon brush, the independent claim 12 of a power transmission unit and the independent claim 13 of a dynamo-electric machine.
  • Advantageous embodiments of the invention are represented by the features of the subclaims.
  • the brush holder of a dynamo-electric machine with a commutator
  • the brush holder has guide regions for guiding a brush displaceable to the longitudinal extension and there is a gap between the guide regions of the brush holder and the brush transversely to the longitudinal extension of the brush. in such a way that in a front of the commutator facing the guide area, the distance in at least one transverse to the brush longitudinal extent is less than in a rear facing away from the commutator guide area.
  • the play between the brush and the brush holder in the area which faces the commutator can be limited so far that the brush is guided in this area almost free of play.
  • a beating of the brush on the brush holder during normal operation of the power transmission unit is prevented when the game is limited in an orientation that is tangent to the commutator.
  • a specified according to DIN 43008 game for a power transmission unit can be maintained and even below.
  • An education of noise by hitting the brush can thus be effectively prevented.
  • experiments have shown that in such an embodiment, a large transverse play between the rear commutator facing away from the guide area and the carbon brush can be present without the brush strikes in operation on the quiver.
  • the great game in the rear guide area is advantageous because there is sufficient space for any resulting brush dust is available. A so-called jamming of the brush in the brush holder can be effectively excluded.
  • such a design of the brush holder allows easy mounting of the power transmission unit, since the brush during assembly of the power transmission unit can be easily inserted into the brush holder.
  • the brush holder in the front guide region has a decisive distance for guiding the brush or a clearance between the brush and the brush holder, which is lower in the front guide region of the brush holder by at least 0.005 mm than in the rear guide region.
  • a sufficiently large clearance is present in the rear guide region of the brush holder when the brush is guided virtually free of play in the front guide region.
  • at least a 0.005 mm larger clearance in the rear guide area sufficient to prevent jamming of the brush in the brush holder when operating in a dynamo-electric machine can be avoided.
  • a guide plane which is formed by the front and rear guide region of a first wall of the brush holder, is inclined to a guide plane which is formed by the front and rear guide region of a second wall, wherein the second wall opposite the first wall.
  • previous production facilities for brush quiver can continue to be used because, for example, the inventive slope of opposite wall portions of the brush holder can be produced by simply pressing in parallel wall sections or guide areas of conventional brush quiver. Therefore, the brush holder can be further manufactured in one piece.
  • At least one wall of the brush holder which guides the brush axially or parallel to the axis of rotation of the commutator, according to a further development of the invention in a front region of the brush holder at least one aperture and / or channel.
  • the opening in the front region of the brush holder is designed as a slot which is open at the commutator end.
  • the breakthrough of the brush holder is designed grid-shaped.
  • a very large opening area can be realized by a plurality of openings in the brush holder, without the stability of the brush holder is limited by such breakthroughs, since the remaining webs between the openings still have sufficient strength.
  • Such a design of the brush holder is used for rapid escape of brush dust.
  • the inwardly directed formations of the front guide region of the brush holder are designed in the form of at least one bead and / or one pimple.
  • Such embodiments can be particularly simple, for example by embossing produce.
  • It is also advantageous in this embodiment of the brush holder that in a closer environment outside the thus formed front guide region of the brush holder, a relatively large clearance or a distance between the brush and the brush holder is possible. Thus, brush dust particles that get between the brush and brush quiver, escape well again.
  • the brush holder in the front guide region on a high-resistance or electrically non-conductive layer is formed on a high-resistance or electrically non-conductive layer.
  • a layer extends over the entire guide region of a brush holder.
  • a brush quiver according to the embodiment of the invention can be made more cost-effective than the previously known brush quiver, since only the front guide portion of the brush holder has an electrically non-conductive layer.
  • the invention also relates to a brush which serves for use in the brush holder according to the invention.
  • the advantageous embodiment of the brush is characterized in that regions of the brush, which may touch the front guide region of the brush holder during a proper use for operating a dynamo-electric machine, have a high-resistance or electrically non-conductive layer. By such a layer, the formation of transverse currents in the brush can be prevented. Since only portions of the brush must have the electrically non-conductive layer, insulation material can be saved compared to full-surface coated brushes.
  • the electrically non-conductive layer of the brush consists of an insulating varnish.
  • Such a paint can be easily applied to the brush, whereby the brush is only slightly more expensive.
  • FIG. 1 shows a section through a power transmission unit and a commutator of a dynamo-electric machine with mutually inclined guide areas
  • FIG. 4 shows a section through a power transmission unit with brush-shaped formations of the brush bag to form a front guide area
  • FIG. 6 shows a side view of the current transmission unit with brush-shaped formations of the brush holder for forming a front guide region and a lateral view of the commutator
  • FIG. 7 shows a transverse section C'-C 'of a current transmission unit in a front guide region, wherein in the region of the front guide region the brush holder has an electrically non-conductive layer,
  • FIGS. 8 and 9 are side views of power transmission units with a brush quiver with lateral openings and a section through the commutator
  • 11 is a transverse section of a power transmission unit with a brush quiver having a channel
  • FIG. 12 shows a section through a power transmission unit with a brush, which has electrically non-conductive layers at outer regions, and
  • FIG. 13 shows a transverse section D - D through the current transmission unit with a brush, which has electrically non-conductive layers at outer regions.
  • the description of the advantageous embodiments of the invention is made on Hand of an application in an AC universal motor, which serves to drive a rotatably mounted drum located in a laundry treatment device.
  • the invention is not limited to such a specific embodiment of a dynamo-electric machine and the use of the machine in the laundry treatment appliance. Rather, the invention extends to power transmission units or brush quivers and brushes which can be used in dynamo-electric machines with a mechanical commutator.
  • Fig. 1 shows a section through a power transmission unit and by a commutator 7 of an unillustrated AC universal motor, which is hereinafter referred to as motor.
  • the power transmission unit consists of a connecting line 1, a multilayer carbon brush 11, which has two electrically conductive layers 5 and 8 and a high-resistance or electrically non-conductive layer 9 between these layers, a spring 2 and a stationary brush holder 3.
  • the connecting line 1 is provided with both Layers 5 and 8 of the multilayer carbon brush 11 connected by a common contact point.
  • the multi-layer carbon brush 11 is also referred to below as a brush 11.
  • the brush 11 is in its longitudinal extent, ie in the direction X, in the brush holder 3 displaced.
  • the brush By means of a force caused by the spring 2, the brush is pressed against the commutator 7 and against the sliders 6 located on the commutator 7.
  • the spring 2 causes the brush 11 is nachgeschoben along the direction X according to an operational wear of the brush 11.
  • the brush 11 slides at a rotation D of the commutator 7, which is fixedly connected to a rotor of the motor, via the fins 6, which are connected to individual windings of the rotor.
  • an electrical contact between the brush 11 and the fins 6 and the windings of the rotor is made.
  • the brush 11 is guided by two opposite inner walls of the brush holder 3, while there is a distance between the brush 11 and the inner walls of the brush holder 3 in each case lying transversely to the brush extension.
  • the inner walls or regions of the inner walls of the brush bag 3 represent so-called guide areas.
  • the walls 4 and 10 of the brush bag 3 are shaped so that the distance 11 between the brush 11 and the Wall portions 4a and 10a in a front guide portion of the brush holder 3 is less than the distance 12 between the brush 11 and the wall portions 4b and 10b in a rear guide portion, thereby form the wall sections 4a and 4b a guide plane 12 and the wall portions 10a and 10b, a management level 14.
  • the front guide portion of the brush holder 3 faces the commutator 7 and lies in a plane AA. Accordingly, the rear guide portion of the brush holder 3 facing away from the commutator 7 and lies in a plane BB.
  • a section in the plane AA through the brush holder 3 and through the brush 11 is shown in Fig. 2 and a section in the plane BB is shown in Fig. 3.
  • a reduction in the clearance between the brush 11 and the brush holder 3 in the direction Y tangent to the commutator 7 reduces the impact of the brush 11 on the brush holder 3, advantageously allowing the backlash in the front guide portion of the brush holder 3 to be reduced
  • the invention is not limited to such a special embodiment of the brush holder 3, wherein the distance 11 between the brush 11 and the brush holder 3 in the front guide region in a direction tangent to the commutator 7 (direction Y) is less than the distance 12 in the rear guide region is.
  • the distance between the brush 11 and the brush holder 3 may also be smaller in the front guide portion in an axial direction (Z direction) transverse to the longitudinal extent of the brush 11 than in a rear guide portion.
  • the carbon brush 11 of a motor of a household washing machine has a width (direction Y) of 5 mm in the present embodiment. It has proved to be particularly favorable to design the brush holder 3 of such a carbon brush 11 in such a manner that the guide opening width of the brush holder 3 in the front guide region is 5.03 mm and is 0.02 mm smaller than in the rear guide region.
  • the distance 11 in the front guide area is thus 0.015 mm on both sides in a centrally located in the brush holder 3 brush 11 and the distance 12 in the rear guide area on both sides 0.025 mm.
  • the plane 12 formed by the front and rear guide portions of one wall of the brush bag 3 is inclined to the opposite plane 14 formed by the front and rear guide portions of the opposite wall of the brush bag 3.
  • the opposite walls 4 and 10 are made straight, thus the walls 4 and 10 are inclined to each other.
  • FIGS. 8 and 9 show lateral views of brush boxes 3 in two different advantageous embodiments, wherein a partial area of the commutator 7 is shown cut in the illustrations.
  • Fig. 10 shows a section through the brush holder 3 in a front or commutator side Area of the brush bag 3.
  • openings 17, 19 are provided in the commutator side area of the walls 21 and 22 of the brush bag 3.
  • the openings 17, 19 are preferably introduced in opposite walls, which guide the brush 11 laterally or axially and lie along the direction Y. Through these openings 17, 19 of the brush dust, which passes between the brush 11 and the brush holder 3, escape again. As a result, clamping of the brush 11 in the brush holder 3 is effectively prevented by brush dust.
  • the openings 17, 19 may be present in other walls of the brush holder 3.
  • the opening 19 of the brush holder 3 is slot-shaped, which is open at the commutator end.
  • further openings 17 are lattice-shaped in the front region of the brush holder 3, wherein between the openings 17 and / or the opening 19 webs 18 remain. Through these webs 18 of the brush holder 3 retains sufficient rigidity.
  • a brush holder 3 shown in Fig. 11, in the front or commutator side region of the brush holder 3 in opposite walls 21, 22 each have a channel 20 is formed.
  • Fig. 11 shows a section through the brush 11 and the brush holder 3 in a plane which faces the commutator.
  • the channels 20 are preferably incorporated in walls which axially guide the brush 11 and lie along the direction Y. Incident brush dust can escape through such channels again from the space between brush 11 and brush quiver.
  • the brush holder 3 has protrusions 13, 15 directed towards the brush 11 in the commutator region, on opposite walls 4 'and 10' of the brush holder 3.
  • the inner surfaces of the formations 13, 15 represent front guide surfaces or guide areas for the brush 11.
  • the formations 13 form with the rear guide region of the wall 4 'of the brush holder 3, the guide plane 12 and the formations 15 form with the rear guide portion of the corresponding opposite wall 10', the guide plane 14th
  • opposite walls of the brush holder 3 may be substantially parallel, wherein the distance 11 between the brush 11 and the front guide portion of the brush holder 3 is less than the distance 12 between the brush 11 and through the protrusions 13, 15 the back guide I am the brush-holder 3
  • the brush holder 3 is made such that the protrusions 13 and 15 of the brush holder 3 are knob-like.
  • a Front guide region are also alternative embodiments of the formations of the brush holder 3, such as one or more beads, possible.
  • the brush holder 3 in the region of the front guide region has a high-resistance or electrically non-conductive layer 16, which faces the brush 11.
  • an insulating varnish is applied to the surface of the molds 13, 15 of the brush holder directed towards the brush 11.
  • FIGS. 12 and 13 show an embodiment of a power transmission unit with a brush quiver 3 according to the invention, which has a smaller distance to the brush 11 in the front guide area than in the rear guide area, and a brush 11, which is a high-resistance or electrically non-conductive Layer 23 or insulating layer 23 has.
  • This electrically non-conductive layer 23 is limited to the areas of the brush 11, which can touch the front guide region of the brush holder 3 during a proper use.
  • an insulating varnish which consists of phenolic resin, epoxy or Polystyrollack and which forms the insulating layer 23, applied to the areas of the brush 11, which can touch the brush holder 3 in a lying substantially tangential to the commutator Y direction.
  • the insulating layer 23 may also be applied to areas that may touch the front guide area in a different direction.
  • the insulating layer 23 may be of another type.
  • the above embodiments of the brush holder 3 and the brush 11 are used singly or in combination in a power transmission unit of an AC universal motor. However, such embodiments can also be used in other dynamo-electric machines, which have a mechanical commutator or a sliding contact system.
  • the brush quiver 3 is produced by punching a semifinished product out of a sheet metal blank, possible recesses, such as the perforations 17 and 19, being taken into account. Such a semi-finished product is bent into a brush quiver having substantially parallel walls. Two end portions of the semifinished product are firmly connected to each other by means of a so-called dovetail connection.
  • the brush quiver thus produced is deformed in the front region in such a way that the distance to a brush 11 to be guided is less than the distance in a rear guide region in at least one longitudinal extension transverse to the brush 11 in a front guide region of the brush holder 3.
  • the walls can also be deformed in such a way that a brush holder 3 shown in FIG. 1 results with mutually inclined walls.
  • a manufacturing step also to the brush 11 directed towards moldings, as shown for example in Fig. 4, are introduced into the brush holder.

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  • Motor Or Generator Current Collectors (AREA)
EP05707879A 2004-01-28 2005-01-28 Bürstenköcher für eine Dynamo-elektrische Maschine Active EP1711985B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004004275A DE102004004275A1 (de) 2004-01-28 2004-01-28 Bürstenköcher für eine dynamo-elektrische Maschine
PCT/EP2005/050363 WO2005074079A1 (de) 2004-01-28 2005-01-28 Bürstenköcher für eine dynamo-elektrische maschine

Publications (2)

Publication Number Publication Date
EP1711985A1 EP1711985A1 (de) 2006-10-18
EP1711985B1 true EP1711985B1 (de) 2007-06-27

Family

ID=34801136

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05707879A Active EP1711985B1 (de) 2004-01-28 2005-01-28 Bürstenköcher für eine Dynamo-elektrische Maschine

Country Status (8)

Country Link
US (1) US7671507B2 (zh)
EP (1) EP1711985B1 (zh)
KR (1) KR101072149B1 (zh)
CN (1) CN100449886C (zh)
AT (1) ATE365990T1 (zh)
DE (2) DE102004004275A1 (zh)
ES (1) ES2288294T3 (zh)
WO (1) WO2005074079A1 (zh)

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DE102004061896A1 (de) * 2004-12-22 2006-07-27 BSH Bosch und Siemens Hausgeräte GmbH Bürstenköcher für eine dynamo-elektrische Maschine
US8624464B2 (en) * 2005-05-20 2014-01-07 Schlumberger Technology Corporation Brush and brush housing arrangement to mitigate hydrodynamic brush lift in fluid-immersed electric motors
DE102005048191A1 (de) * 2005-10-07 2007-04-19 BSH Bosch und Siemens Hausgeräte GmbH Kohlebürstenhalter für eine elektro-dynamische Maschine
CN103427269A (zh) * 2012-05-16 2013-12-04 海门市海菱碳业有限公司 用于电钻的复合碳刷
CN105226476A (zh) * 2014-06-25 2016-01-06 西安立科环保科技有限公司 一种新型整体碳刷架
DE102015203762A1 (de) * 2015-03-03 2016-09-08 Robert Bosch Gmbh Bürstenhalter zum Kontaktieren eines Kommutators
DE102017006277A1 (de) * 2016-07-04 2018-01-04 Mando Corporation Stromversorgungsvorrichtung für einen feldwicklungsmotor sowie feldwicklungsmotor, der diese enthält
CN108598823B (zh) * 2018-04-18 2023-10-03 上海马陆日用友捷汽车电气有限公司 一种电刷架装配组件
CN109560653A (zh) * 2018-12-24 2019-04-02 贵阳万江航空机电有限公司 一种刷盒及其与刷架环的配合结构
KR102621623B1 (ko) 2023-02-01 2024-01-08 한전케이피에스 주식회사 발전기 브러시 분담전류 개선 장치
KR102555393B1 (ko) 2023-04-14 2023-07-13 한전케이피에스 주식회사 브러시 접촉면 자동연마기

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Also Published As

Publication number Publication date
CN1918755A (zh) 2007-02-21
CN100449886C (zh) 2009-01-07
DE502005000943D1 (de) 2007-08-09
ES2288294T3 (es) 2008-01-01
EP1711985A1 (de) 2006-10-18
US7671507B2 (en) 2010-03-02
ATE365990T1 (de) 2007-07-15
KR20060117993A (ko) 2006-11-17
US20090021103A1 (en) 2009-01-22
KR101072149B1 (ko) 2011-10-10
DE102004004275A1 (de) 2005-08-18
WO2005074079A1 (de) 2005-08-11

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