EP0081828A2 - Carbon brush for electrical machines - Google Patents

Carbon brush for electrical machines Download PDF

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Publication number
EP0081828A2
EP0081828A2 EP82111465A EP82111465A EP0081828A2 EP 0081828 A2 EP0081828 A2 EP 0081828A2 EP 82111465 A EP82111465 A EP 82111465A EP 82111465 A EP82111465 A EP 82111465A EP 0081828 A2 EP0081828 A2 EP 0081828A2
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EP
European Patent Office
Prior art keywords
carbon brush
flank
brush according
curvature
groove
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
Application number
EP82111465A
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German (de)
French (fr)
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EP0081828B1 (en
EP0081828A3 (en
Inventor
Peter Dipl.-Ing. Hoffmann
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Hoffmann and Co Elektrokohle AG
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Hoffmann and Co Elektrokohle AG
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Publication date
Application filed by Hoffmann and Co Elektrokohle AG filed Critical Hoffmann and Co Elektrokohle AG
Priority to AT82111465T priority Critical patent/ATE18963T1/en
Publication of EP0081828A2 publication Critical patent/EP0081828A2/en
Publication of EP0081828A3 publication Critical patent/EP0081828A3/en
Application granted granted Critical
Publication of EP0081828B1 publication Critical patent/EP0081828B1/en
Expired legal-status Critical Current

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    • 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
    • H01R39/26—Solid sliding contacts, e.g. carbon brush

Definitions

  • the invention relates to a carbon brush for electrical machines with a contact surface or the like in cross section a hollowed profile for contact with a collector. Slip ring with nominal radius.
  • the tread has a uniform circular arc-shaped profile over its width, the radius of which corresponds to the nominal radius.
  • the flanks of the profile lying on both sides of the central plane therefore have the same radius of curvature and the same center of curvature lying on the plane. This ensures that the running surface is as large as possible in contact with the collector and thus one as possible
  • the aim is to distribute electricity across the entire area.
  • carbon brushes generally require a break-in period during which the ideal operating conditions have not yet been reached.
  • the carbon brush may be asymmetrically positioned on the collector, which is due in particular to the inevitable play of the carbon brush in the brush holder.
  • the system can fail during peak loads and result in expensive downtimes and repair times.
  • the object of the invention is to create a carbon brush with improved running-in behavior.
  • flanks of the tread pattern lying on both sides of the central plane and inclined to it run without curvature or with less curvature than the nominal radius tangential to a circle with nominal radius.
  • the two flanks of the tread pattern are therefore steeper than the nominal radius speaking circle, and when the carbon brush is attached to the collector, this initially has a line contact symmetrical on both sides of the central plane. This also results in a symmetrical load, with actuating forces acting perpendicular to the tread flanks, which force a geometric and thus also an electrical symmetry.
  • the running-in process is thus largely symmetrical until, due to increasing wear of the contact surface of the carbon brush, more and more full-surface contact of the collector on both flanks of the tread pattern is achieved in accordance with the continuous operating state.
  • each flank of the profile is curved with respect to a center of curvature lying on the other side of the center plane.
  • each flank can be formed by rib-like elevations which run in the transverse direction of the contact surface and are separated from one another by groove-like depressions. It is particularly advantageous if the rib-like elevations of one flank continue the groove-like depressions of the other flank run. This also makes manufacturing easier.
  • the groove-like depressions in each flank of the contact surface can, for example, have a flat course perpendicular to the central plane, or they can be designed to decrease at a clearance angle with respect to a plane perpendicular to the central plane.
  • the rib-like elevations preferably have a rectangular cross section.
  • the carbon brush 1 shown in Fig. 1 has a tread 2, which is formed by raised rib-like Surface areas 4, 5.
  • the surface areas 4 lie on one side and the surface areas 5 on the other side of the longitudinal center plane or symmetry plane 6 of the carbon brush 1.
  • Each rib-like raised surface area 4, 5 has a rectangular cross section and a cylindrically curved surface. These surfaces of the rib-like elevations 4, 5 form the two flanks of the contact surface profile of the carbon brush 1 on both sides of the central plane 6.
  • each raised surface area 4, 5 is curved with a radius of curvature R1, specifically around a center point M ′, M ′′, which is not offset on the central plane 6, but from this to the other side.
  • the radius of curvature R1 is slightly larger than the target radius R2 of the collector with which the brush is to be used.
  • the raised surface areas 4, 5 curved with radius R1 lie tangentially to a circle with a nominal radius R2 around a center point M lying on the central plane 6.
  • the initial contact with a collector with radius R2 thus takes place in a line-like manner symmetrically on both sides of the central plane 6, whereby the areas of contact widen rapidly as the wear progresses, but still lie symmetrically to the central plane 6. Only after extensive wear does the low point of the tread pattern on the middle level 6 come into contact with the collector circle profile with radius R2.
  • Each raised surface area 4 or 5 continues on the other side of the central plane 6 in a groove-like recessed surface area 8 or 9.
  • Its profile course transverse to the central plane 6 is in itself arbitrary. It can, for example, as shown in FIG. 2 at 8 ', continue the curvature of the raised surface area 4 with the radius R1 around the center point M ". However, as indicated in FIG. 1 at 8, they can also be one have a flat course at right angles to the central plane 6. Finally, a course is indicated at 8 ′′ in FIG. 1, in which the groove-like surface area is designed to have a clearance angle with respect to the plane perpendicular to the central plane 6.
  • Fig. 3 shows an embodiment in which the rib-like raised surface areas 4, 5 of the two flanks of the contact surface profile have a flat course inclined to the central plane 6, so that there is a dovetail-shaped contact surface profile. These surfaces are tangent to a circle with the nominal radius R2, the contact at the contact points 11 initially being even more linear than in the embodiment according to FIGS. 1 and 2.
  • the profiling of the contact surface of the carbon brush according to the invention can advantageously be carried out simultaneously with the pressing of the carbon brush, in which case no reworking of the pressed contact surface to adapt to the collector is required when the brush is finished.

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  • Motor Or Generator Current Collectors (AREA)

Abstract

1. A carbon brush (1) for electrical machines, with a contact surface which in cross-section has a hollowed profile with flanks (4, 5) inclined towards the centre plane for contact with a commutator or similar slip ring with a nominal radius (R2), characterised in that the two flanks (4, 5) of the profile extend without curvature or with lesser curvature (R1) than the nominal radius (R2) tangentially to a circle of nominal radius (R2).

Description

Die Erfindung betrifft eine Kohlebürste für elektrische Maschinen mit einer Kontaktfläche, die im Querschnitt ein ausgehöhltes Profil zur Anlage an einen Kollektor od.dgl. Schleifring mit Sollradius aufweist.The invention relates to a carbon brush for electrical machines with a contact surface or the like in cross section a hollowed profile for contact with a collector. Slip ring with nominal radius.

Bei bekannten Kohlebürsten hat die Lauffläche über ihre Breite ein einheitlich kreisbogenförmiges Profil, dessen Radius dem Sollradius entspricht. Die auf beiden Seiten der Mittelebene liegenden Flanken des Profils haben also gleichen Krümmungsradius und den gleichen, auf der Ebene liegenden Krümmungsmittelpunkt. Hiermit wird eine möglichst großflächige Anlage der Lauffläche am Kollektor und damit eine möglichst über die ganze Fläche verteilte Strombelastung angestrebt. Es ist jedoch bekannt, daß Kohlebürsten grundsätzlich eine Einlaufzeit benötigen, während der die idealen Betriebsverhältnisse noch nicht erreicht werden. Bei diesem Einlaufen kann es selbst dann, wenn das Laufflächenprofil ohne Toleranzfehler dem Sollradius entsprechend hergestellt wurde, zu einer asymmetrischen Anlage der Kohlebürste am Kollektor kommen, welches insbesondere durch das unvermeidliche Spiel der Kohlebürste im Bürstenhalter bedingt ist. Während dieses Einlaufzustandes kann es bei Belastungsspitzen zu einem Versagen des Systems und dadurch bedingten kostspieligen Stand- und Reparaturzeiten kommen.In known carbon brushes, the tread has a uniform circular arc-shaped profile over its width, the radius of which corresponds to the nominal radius. The flanks of the profile lying on both sides of the central plane therefore have the same radius of curvature and the same center of curvature lying on the plane. This ensures that the running surface is as large as possible in contact with the collector and thus one as possible The aim is to distribute electricity across the entire area. However, it is known that carbon brushes generally require a break-in period during which the ideal operating conditions have not yet been reached. During this running-in, even if the tread pattern was made according to the target radius without a tolerance error, the carbon brush may be asymmetrically positioned on the collector, which is due in particular to the inevitable play of the carbon brush in the brush holder. During this run-in state, the system can fail during peak loads and result in expensive downtimes and repair times.

Aufgabe der Erfindung ist es, eine Kohlebürste mit verbessertem Einlaufverhalten zu schaffen.The object of the invention is to create a carbon brush with improved running-in behavior.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die zu beiden Seiten der Mittelebene liegenden, zu dieser geneigten Flanken des Laufflächenprofils ohne Krümmung oder mit geringerer Krümmung als der Sollradius tangential zu einem Kreis mit Sollradius verlaufen.This object is achieved in that the flanks of the tread pattern lying on both sides of the central plane and inclined to it run without curvature or with less curvature than the nominal radius tangential to a circle with nominal radius.

Die beiden Flanken des Laufflächenprofils verlaufen somit von Anfang an steiler als ein dem Sollradius entsprechender Kreis, und beim Ansetzen der Kohlebürste an den Kollektor hat dieser zunächst eine Linienberührung symmetrisch zu beiden Seiten der Mittelebene. Hierdurch kommt es auch zu einer symmetrischen Kraftbelastung, wobei senkrecht zu den Laufflächenflanken wirkende Stellkräfte auftreten, die eine geometrische und damit auch eine elektrische Symmetrie erzwingen. Der Einlaufvorgang erfolgt somit weitgehend symmetrisch, bis durch zunehmender Abnutzung der Kontaktfläche der Kohlebürste eine mehr und mehr ganzflächige Anlage des Kollektors an beiden Flanken des Laufflächenprofils entsprechend dem Dauerbetriebszustand erreicht ist.From the start, the two flanks of the tread pattern are therefore steeper than the nominal radius speaking circle, and when the carbon brush is attached to the collector, this initially has a line contact symmetrical on both sides of the central plane. This also results in a symmetrical load, with actuating forces acting perpendicular to the tread flanks, which force a geometric and thus also an electrical symmetry. The running-in process is thus largely symmetrical until, due to increasing wear of the contact surface of the carbon brush, more and more full-surface contact of the collector on both flanks of the tread pattern is achieved in accordance with the continuous operating state.

Gemäß einer bevorzugten Ausführungsform der Erfindung ist jede Flanke des Profils bezüglich eines auf der jeweils anderen Seite der Mittelebene liegenden Krümmungsmittelpunktes gekrümmt.According to a preferred embodiment of the invention, each flank of the profile is curved with respect to a center of curvature lying on the other side of the center plane.

In weiterer vorteilhafter Ausgestaltung der Erfindung kann jede Flanke von in Querrichtung der Kontaktfläche verlaufenden rippenartigen Erhöhungen gebildet sein, die durch nutartige Vertiefungen voneinander getrennt sind. Dabei ist es besonders vorteilhaft, wenn die rippenartigen Erhöhungen der einen Flanke in Fortsetzung der nutartigen Vertiefungen der anderen Flanke verlaufen. Hierdurch wird vor allem auch die Fertigung erleichtert. Die nutartigen Vertiefungen in jeder Flanke der Kontaktfläche können z.B. einen ebenen Verlauf senkrecht zur Mittelebene aufweisen, oder sie können gegenüber einer zur Mittelebene rechtwinkligen Ebene in einem Freiwinkel abfallend ausgebildet sein.In a further advantageous embodiment of the invention, each flank can be formed by rib-like elevations which run in the transverse direction of the contact surface and are separated from one another by groove-like depressions. It is particularly advantageous if the rib-like elevations of one flank continue the groove-like depressions of the other flank run. This also makes manufacturing easier. The groove-like depressions in each flank of the contact surface can, for example, have a flat course perpendicular to the central plane, or they can be designed to decrease at a clearance angle with respect to a plane perpendicular to the central plane.

Die rippenartigen Erhöhungen haben vorzugsweise einen rechtwinkligen Querschnitt.The rib-like elevations preferably have a rectangular cross section.

Ausführungsformen der Erfindung werden anhand der Zeichnungen näher erläutert.Embodiments of the invention are explained in more detail with reference to the drawings.

  • Fig. 1 zeigt eine perspektivische Darstellung einer Kohlebürste gemäß einer bevorzugten Ausführungsform der Erfindung.1 shows a perspective illustration of a carbon brush according to a preferred embodiment of the invention.
  • Fig. 2 zeigt einen Querschnitt durch die Kohlebürste nach Fig. 1.FIG. 2 shows a cross section through the carbon brush according to FIG. 1.
  • Fig. 3 zeigt im Querschnitt eine andere Ausführungsform der Kohlebürste.Fig. 3 shows in cross section another embodiment of the carbon brush.

Die in Fig. 1 dargestellte Kohlebürste 1 hat eine Lauffläche 2, die gebildet wird von rippenartig erhöhten Flächenbereichen 4, 5. Die Flächenbereiche 4 liegen auf der einen und die Flächenbereiche 5 auf der anderen Seite der Längsmittelebene oder Symmetrieebene 6 der Kohlebürste 1. Jeder rippenartig erhöhte Flächenbereich 4, 5 hat einen rechteckigen Querschnitt und eine zylindrisch gekrümmte Oberfläche. Diese Oberflächen der rippenartig Erhöhungen 4, 5 bilden die beiden Flanken des Kontaktflächenprofils der Kohlebürste 1 zu beiden Seiten der Mittelebene 6.The carbon brush 1 shown in Fig. 1 has a tread 2, which is formed by raised rib-like Surface areas 4, 5. The surface areas 4 lie on one side and the surface areas 5 on the other side of the longitudinal center plane or symmetry plane 6 of the carbon brush 1. Each rib-like raised surface area 4, 5 has a rectangular cross section and a cylindrically curved surface. These surfaces of the rib-like elevations 4, 5 form the two flanks of the contact surface profile of the carbon brush 1 on both sides of the central plane 6.

Wie aus Fig. 2 ersichtlich, ist jeder erhöhte Flächenbereich 4, 5 mit einem Krümmungsradius R1 gekrümmt, und zwar um einen Mittelpunkt M', M'', der nicht auf der Mittelebene 6, sondern von dieser nach der jeweils anderen Seite versetzt liegt. Der Krümmungsradius R1 ist etwas größer als der Sollradius R2 des Kollektors, mit dem die Bürste verwendet werden soll. Somit liegen die mit Radius R1 gekrümmten erhöhten Flächenbereiche 4, 5 tangential zu einem Kreis mit Sollradius R2 um einen auf der Mittelebene 6 liegenden Mittelpunkt M. Die anfängliche Berührung mit einem Kollektor mit Radius R2 erfolgt somit linienförmig symmetrisch zu beiden Seiten der Mittelebene 6, wobei sich mit fortschreitender Abnutzung die Berührungsflächen rasch verbreitern, aber nach wie vor symmetrisch zur Mittelebene 6 liegen. Erst nach sehr weitgehender Abnutzung kommt auch der Tiefpunkt des Laufflächenprofils auf der Mittelebene 6 in Berührung mit dem Kollektorkreisprofil mit Radius R2.As can be seen from FIG. 2, each raised surface area 4, 5 is curved with a radius of curvature R1, specifically around a center point M ′, M ″, which is not offset on the central plane 6, but from this to the other side. The radius of curvature R1 is slightly larger than the target radius R2 of the collector with which the brush is to be used. Thus, the raised surface areas 4, 5 curved with radius R1 lie tangentially to a circle with a nominal radius R2 around a center point M lying on the central plane 6. The initial contact with a collector with radius R2 thus takes place in a line-like manner symmetrically on both sides of the central plane 6, whereby the areas of contact widen rapidly as the wear progresses, but still lie symmetrically to the central plane 6. Only after extensive wear does the low point of the tread pattern on the middle level 6 come into contact with the collector circle profile with radius R2.

Jeder erhöhte Flächenbereich 4 bzw. 5 setzt sich auf der jeweils anderen Seite der Mittelebene 6 in einem nutartig vertieften Flächenbereich 8 bzw. 9 fort. Dessen Profilverlauf quer zur Mittelebene 6 ist an sich beliebig. Er kann beispielsweise, wie in Fig. 2 bei 8' dargestellt ist, in Fortsetzung der Krümmung des erhöhten Flächenbereichs 4 mit dem Radius R1 um den Mittelpunkt M" verlaufen. Sie können aber auch, wie in Fig. 1 bei 8 angegeben ist, einen ebenen Verlauf rechtwinklig zur Mittelebene 6 haben. Schließlich ist in Fig. 1 bei 8'' ein Verlauf angedeutet, bei dem der nutartige Flächenbereich mit einem Freiwinkel gegenüber der zur Mittelebene 6 senkrechten Ebene abfallend ausgebildet ist.Each raised surface area 4 or 5 continues on the other side of the central plane 6 in a groove-like recessed surface area 8 or 9. Its profile course transverse to the central plane 6 is in itself arbitrary. It can, for example, as shown in FIG. 2 at 8 ', continue the curvature of the raised surface area 4 with the radius R1 around the center point M ". However, as indicated in FIG. 1 at 8, they can also be one have a flat course at right angles to the central plane 6. Finally, a course is indicated at 8 ″ in FIG. 1, in which the groove-like surface area is designed to have a clearance angle with respect to the plane perpendicular to the central plane 6.

Jeweils wesentlich ist, daß die nutartigen Vertiefungen der einen Kontaktflächenflanke in Fortsetzung der rippenartigen Erhöhungen der anderen Flanke verlaufen und umgekehrt.It is essential in each case that the groove-like depressions of one flank of the contact surface continue the rib-like elevations of the other flank and vice versa.

Fig. 3 zeigt eine Ausführungsform, bei der die rippenartig erhöhten Flächenbereiche 4, 5 der beiden Flanken des Kontaktflächenprofils einen ebenen, zur Mittelebene 6 geneigten Verlauf haben, so daß sich ein schwalbenschwanzförmiges Kontaktflächenprofil ergibt. Diese Flächen liegen tangential zu einem Kreis mit dem Sollradius R2, wobei der Kontakt an den Berührungsstellen 11 anfänglich noch stärker linienförmig ist als bei der Ausführungsform nach Fig. 1 und 2.Fig. 3 shows an embodiment in which the rib-like raised surface areas 4, 5 of the two flanks of the contact surface profile have a flat course inclined to the central plane 6, so that there is a dovetail-shaped contact surface profile. These surfaces are tangent to a circle with the nominal radius R2, the contact at the contact points 11 initially being even more linear than in the embodiment according to FIGS. 1 and 2.

Die erfindungsgemäße Profilierung der Kontaktfläche der Kohlebürste kann in vorteilhafter Weise gleichzeitig mit dem Pressen der Kohlebürste erfolgen, wobei dann keine Nachbearbeitung der gepreßten Kontaktfläche zur Anpassung an den Kollektor bei der Endfertigung der Bürste erforderlich ist. Es ist jedoch auch möglich, die erfindungsgemäße Ausbildung der Laufflächen durch nachträgliches mechanisches Bearbeiten der gepreßten Bürste vorzunehmen, wobei insbesondere die nutartig vertieften Flächenbereiche 8, 9 das mechansiche Bearbeiten der ihnen jeweils gegenüberliegenden rippenartig erhöhten Flächenbereiche 4, 5 erleichtern.The profiling of the contact surface of the carbon brush according to the invention can advantageously be carried out simultaneously with the pressing of the carbon brush, in which case no reworking of the pressed contact surface to adapt to the collector is required when the brush is finished. However, it is also possible to carry out the formation of the treads according to the invention by subsequent mechanical processing of the pressed brush, the groove-like recessed surface areas 8, 9 in particular facilitating the mechanical processing of the opposite rib-like raised surface areas 4, 5.

Claims (7)

1. Kohlebürste für elektrische Maschinen mit einer Kontaktfläche, die im Querschnitt ein ausgehöhltes Profil mit zur Mittelebene geneigten Flanken zur Anlage an einen Kollektor od.dgl. Schleifring mit Sollradius aufweist, dadurch gekennzeichnet , daß die beiden Flanken (4, 5) des Profils ohne Krümmung oder mit geringerer Krümmung (R1) als der Sollradius (R2) tangential zu einem Kreis mit Sollradius (R2) verlaufen.1. Carbon brush for electrical machines with a contact surface, or the like in cross section a hollowed profile with flanks inclined to the central plane for contact with a collector. Slip ring with a nominal radius, characterized in that the two flanks (4, 5) of the profile run without curvature or with a smaller curvature (R1) than the nominal radius (R2) tangential to a circle with nominal radius (R2). 2. Kohlebürste nach Anspruch 1 , dadurch gekennzeichnet, daß jede Flanke (4, 5) bezüglich eines jeweils auf der anderen Seite der Mittelebene (6) liegenden Krümmungsmittelpunktes (M', M'') gekrümmt ist.2. Carbon brush according to claim 1, characterized in that each flank (4, 5) with respect to one lying on the other side of the central plane (6) Center of curvature (M ', M'') is curved. 3. Kohlebürste nach Anspruch 1 oder 2 , dadurch gekennzeichnet, daß jede Flanke des Kontaktflächenprofils von in Querrichtung der Kontaktfläche verlaufenden, rippenartig erhöhten Flächenbereichen (4, 5) gebildet wird, die durch nutartige Vertiefungen (8, 9) voneinander getrennt sind.3. Carbon brush according to claim 1 or 2, characterized in that each flank of the contact surface profile is formed by extending in the transverse direction of the contact surface, rib-like raised surface areas (4, 5) which are separated from one another by groove-like depressions (8, 9). 4. Kohlebürste nach Anspruch 3 , dadurch gekennzeichnet , daß die rippenartigen Erhöhungen (4) der einen Flanke in Fortsetzung der nutartigen Vertiefungen (8) der anderen Flanke verlaufen.4. Carbon brush according to claim 3, characterized in that the rib-like elevations (4) of one flank in continuation of the groove-like depressions (8) of the other flank. 5. Kohlebürste nach Anspruch 3 oder 4 , dadurch gekennzeichnet , daß die rippenartigen Erhöhungen im Querschnitt rechtwinklig ausgebildet sind.5. Carbon brush according to claim 3 or 4, characterized in that the rib-like elevations are rectangular in cross section. 6. Kohlebürste nach einem der Ansprüche 3 bis 5 , dadurch gekennzeichnet , daß jede nutartige Vertiefung (8, 9) einen zur Mittelebene (6) annähernd rechtwinkligen Verlauf hat.6. Carbon brush according to one of claims 3 to 5, characterized in that each groove-like recess (8, 9) has an approximately rectangular course to the central plane (6). 7. Kohlebürste nach einem der Ansprüche 3 bis 5 , dadurch gekennzeichnet , daß jede nutartige Vertiefung (8', 9') gegenüber einer zur Mittelebene (6) rechtwinkligen Ebene (10) in einem Freiwinkel abfallend ausgebildet ist.7. Carbon brush according to one of claims 3 to 5, characterized in that each groove-like recess (8 ', 9') with respect to one of the means plane (6) rectangular plane (10) sloping at a clearance angle.
EP82111465A 1981-12-10 1982-12-10 Carbon brush for electrical machines Expired EP0081828B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82111465T ATE18963T1 (en) 1981-12-10 1982-12-10 CARBON BRUSH FOR ELECTRICAL MACHINES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3148996 1981-12-10
DE19813148996 DE3148996A1 (en) 1981-12-10 1981-12-10 CARBON BRUSH FOR ELECTRICAL MACHINES

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EP0081828A2 true EP0081828A2 (en) 1983-06-22
EP0081828A3 EP0081828A3 (en) 1984-03-21
EP0081828B1 EP0081828B1 (en) 1986-04-02

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AT (1) ATE18963T1 (en)
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EP0373902A2 (en) * 1988-12-14 1990-06-20 Mitsubishi Denki Kabushiki Kaisha Electrical brush assembly
DE19816477A1 (en) * 1998-04-14 1999-10-21 Bsh Bosch Siemens Hausgeraete Carbon brush
WO2005027281A1 (en) * 2003-09-03 2005-03-24 Robert Bosch Gmbh Electric motor
US8558429B2 (en) 2011-01-05 2013-10-15 General Electric Company Systems, methods, and apparatus for lifting brushes of an induction motor
US8648515B2 (en) 2009-03-03 2014-02-11 Johnson Electric S.A. Brush design for electric motor having commutator
US8674581B2 (en) 2011-01-05 2014-03-18 General Electric Company Systems, methods, and apparatus for shorting slip rings of an induction motor
WO2015155321A1 (en) * 2014-04-10 2015-10-15 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Electric motor and brush therefor
EP4002657A1 (en) * 2020-11-13 2022-05-25 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Bamberg Electric motor with a commutator

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DE4438868C2 (en) * 1994-11-03 2002-01-24 Bosch Gmbh Robert Carbon brush for a DC motor
CN211404958U (en) * 2019-11-21 2020-09-01 广东德昌电机有限公司 Brush motor and brush structure thereof

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FR1174253A (en) * 1957-04-17 1959-03-09 Improvements to electric motor brushes
FR2437710A1 (en) * 1978-09-26 1980-04-25 Lorraine Carbone Grooved brushes for electrical machines - have grooves, pref. of triangular cross=section formed in rubbing face without intersecting periphery of brush to avoid chipping

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DE6802635U (en) * 1968-01-11 1969-03-13 Rau Swf Autozubehoer CHARCOAL BRUSH FOR ELECTRIC MACHINERY
GB1309104A (en) * 1970-08-26 1973-03-07 Morganite Carbon Ltd Electrical contact brushes for conductive co-operation with a rotating member of an electrical machine

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Publication number Priority date Publication date Assignee Title
FR1174253A (en) * 1957-04-17 1959-03-09 Improvements to electric motor brushes
FR2437710A1 (en) * 1978-09-26 1980-04-25 Lorraine Carbone Grooved brushes for electrical machines - have grooves, pref. of triangular cross=section formed in rubbing face without intersecting periphery of brush to avoid chipping

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0373902A2 (en) * 1988-12-14 1990-06-20 Mitsubishi Denki Kabushiki Kaisha Electrical brush assembly
EP0373902A3 (en) * 1988-12-14 1990-11-28 Mitsubishi Denki Kabushiki Kaisha Electrical brush assembly
US4983873A (en) * 1988-12-14 1991-01-08 Mitsubishi Denki Kabushiki Kaisha Electrical brush assembly
DE19816477A1 (en) * 1998-04-14 1999-10-21 Bsh Bosch Siemens Hausgeraete Carbon brush
WO2005027281A1 (en) * 2003-09-03 2005-03-24 Robert Bosch Gmbh Electric motor
US8648515B2 (en) 2009-03-03 2014-02-11 Johnson Electric S.A. Brush design for electric motor having commutator
US8558429B2 (en) 2011-01-05 2013-10-15 General Electric Company Systems, methods, and apparatus for lifting brushes of an induction motor
US8674581B2 (en) 2011-01-05 2014-03-18 General Electric Company Systems, methods, and apparatus for shorting slip rings of an induction motor
WO2015155321A1 (en) * 2014-04-10 2015-10-15 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Electric motor and brush therefor
EP4002657A1 (en) * 2020-11-13 2022-05-25 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Bamberg Electric motor with a commutator

Also Published As

Publication number Publication date
EP0081828B1 (en) 1986-04-02
DE3270312D1 (en) 1986-05-07
ATE18963T1 (en) 1986-04-15
EP0081828A3 (en) 1984-03-21
DE3148996A1 (en) 1983-06-23

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