DE2643191A1 - Commutator for electrical machine - has skewed laminations to provide smoother commutation and mechanical running - Google Patents

Commutator for electrical machine - has skewed laminations to provide smoother commutation and mechanical running

Info

Publication number
DE2643191A1
DE2643191A1 DE19762643191 DE2643191A DE2643191A1 DE 2643191 A1 DE2643191 A1 DE 2643191A1 DE 19762643191 DE19762643191 DE 19762643191 DE 2643191 A DE2643191 A DE 2643191A DE 2643191 A1 DE2643191 A1 DE 2643191A1
Authority
DE
Germany
Prior art keywords
commutator
laminations
commutation
electrical machine
brushes
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.)
Pending
Application number
DE19762643191
Other languages
German (de)
Inventor
Juergen Dipl Ing Kuhlow
Walter Dipl Ing Rappenglueck
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE19762643191 priority Critical patent/DE2643191A1/en
Publication of DE2643191A1 publication Critical patent/DE2643191A1/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • H02K13/10—Arrangements of brushes or commutators specially adapted for improving commutation
    • 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
    • H01R39/46—Auxiliary means for improving current transfer, or for reducing or preventing sparking or arcing
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Current Collectors (AREA)

Abstract

The laminations (2) of the commutator (1) are skewed relative to the rotational axis (3), the laminations remaining parallel to each other. This skewing, which is typically two commutator bar pitches, ensures that the current flow between the segment leaving the brush and the brush trailing edge is not suddenly interrupted but broken gradually. This has the effect to reducing leaving edge sparking at the brushes. It may also have beneficial effects mechanically. If there is unevenness between laminations, or if the insulation between bars is not even the brushes do not rise or drop so abruptly and thus quieter and less damaging running follows.

Description

Stromwender für elektrische MaschinenConverters for electrical machines

Stromwender für elektrische Maschinen bestehen bekanntlich aus einer Vielzahl von gegeneinander isolierten Lamellen, insbesondere aus Kupfer. Die Lamellen sind stets so ausgerichtet, daß sie achsparallel verlaufen. Da die zur Stromübertragung auf den Stromwender leitenden Bürsten ebenfalls achsparallel verlaufende Kanten haben, erfolgt das Abschalten der einzelnen Lamellen von der Stromführung abrupt. Daraus ergeben sich hohe Schaltbeanpruchungen, die unter Umständen auch eine un-rwünschte Funkenbildung zur Folge haben können. Weiterhin treten dabei auch mechanische Stöße auf, da die Isolierung zwischen den Lamellen, meist eine Glimmerschicht, nicht die gleiche Höhe wie die Lamellen aufweist.As is known, commutators for electrical machines consist of one Large number of mutually insulated lamellas, in particular made of copper. The slats are always aligned so that they are axially parallel. Because the power transmission On the commutator conductive brushes also axially parallel edges the individual slats are switched off abruptly from the current conduction. This results in high switching loads, which may also be undesirable Can result in sparking. Mechanical shocks also occur on, as the insulation between the slats, usually a layer of mica, not the has the same height as the slats.

Durch die vorliegende Erfindung sollen die Schaltbeanspruchungen beim Betrieb eines Stromwenders verringert werden. Diese Aufgabe wird dadurch gelöst, daß gemäß der Erfindung die Lamellen schräg zur Längsachse des Stromwenders angeordnet sind. Durch diese Schrägung der Lamellen ist für das Ablaufen der Bürstenkante an der Lamellenkante ein definierter Zeitraum erforderlIch, wodurch die Schaltbeanspruchungen geringer werden. Dies hat auch den Vorteil, daß der funkenfreie Bereich für den Betrieb der Maschine erweitert wird. Da außerdem noch die Laufunruhe infolge des sanften Abgleitens von der Lamellenkante geringer wird, kann eine wesentliche Erhöhung der Lebensdauer sowohl des Stromwenders als auch der Bürsten erzielt werden.By the present invention, the switching loads at Operation of a commutator can be reduced. This task is solved by that according to the invention, the slats are arranged obliquely to the longitudinal axis of the commutator are. This inclination of the slats allows the brush edge to run off the lamellar edge requires a defined period of time, which reduces the switching loads decrease. This also has the advantage that the spark-free area for the Operation of the machine is expanded. Since the uneven running as a result of the gentle sliding off the edge of the lamella is reduced, can be a substantial increase the service life of both the commutator and the brushes can be achieved.

Die Schrägung der Lamellen gegenüber der Längsachse des Stromwenders ergibt keinen besonderen Fertigungsaufwand, sie kann nack dem Schichten durch entsprechende Verschiebung einer Stirnfläche einfach hergestellt werden. Der Kontroll- und Meßaufwand bleibt der gleiche wie bei der Fertigung von Stromwendern mit achsparallelen Lamellen. Mit Vorteil wird man die Schrägung in einer Größe bis zu zwei Lamellenteilungen wählen.The inclination of the slats in relation to the longitudinal axis of the commutator does not result in any special manufacturing effort, it can be done by shifting accordingly Shifting an end face can be produced easily. The control and measurement effort remains the same as in the manufacture of commutators with axially parallel slats. It is advantageous to use the bevel in one size up to two lamellar divisions Select.

In der Figur ist schematisch die Aufsicht auf einen gemäß der Erfindung ausgebildeten Stromwender dargestellt. Bei diesem Stromwender 1 sind die Lamellen 2 aus Kupfer jeweils schräg zur Längsachse 3 des Stromwenders 1 angeordnet. Die Schrägung beträgt hierbei eine Lamellenteilung.In the figure is a schematic plan view of one according to the invention trained commutator shown. In this commutator 1 are the slats 2 made of copper, each arranged at an angle to the longitudinal axis 3 of the commutator 1. the The incline here is one lamella division.

1 Figur 2 Ansprüche L e e r s e i t e1 Figure 2 claims L e r s e i t e

Claims (2)

Patentansprüche I.Stromwender für elektrische Maschinen, bestehend aus gegenwander isolierten, in Längsrichtung parallel liegenden Lamellen, insbesondere aus Kupfer, dadurch gekennzeichnet, daß die Lamellen (2) schräg zur Längsachse (3) des Stromwenders (1) angeordnet sind.Claims I. Current converter for electrical machines, consisting made of lamellae, insulated against one another and lying parallel in the longitudinal direction, in particular made of copper, characterized in that the lamellae (2) at an angle to the longitudinal axis (3) of the commutator (1) are arranged. 2. Stromwender nach Anspruch 1, dadurch gekennzeichnet, daß die Schrägung bis zu zwei Lamellenteilungen beträgt. 2. commutator according to claim 1, characterized in that the bevel up to two slat pitches.
DE19762643191 1976-09-22 1976-09-22 Commutator for electrical machine - has skewed laminations to provide smoother commutation and mechanical running Pending DE2643191A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762643191 DE2643191A1 (en) 1976-09-22 1976-09-22 Commutator for electrical machine - has skewed laminations to provide smoother commutation and mechanical running

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762643191 DE2643191A1 (en) 1976-09-22 1976-09-22 Commutator for electrical machine - has skewed laminations to provide smoother commutation and mechanical running

Publications (1)

Publication Number Publication Date
DE2643191A1 true DE2643191A1 (en) 1978-03-23

Family

ID=5988810

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19762643191 Pending DE2643191A1 (en) 1976-09-22 1976-09-22 Commutator for electrical machine - has skewed laminations to provide smoother commutation and mechanical running

Country Status (1)

Country Link
DE (1) DE2643191A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0548244A1 (en) * 1990-09-10 1993-06-30 United Technologies Corporation Reduced noise commutator
EP0966072A2 (en) * 1998-06-17 1999-12-22 Robert Bosch Gmbh Commutator device for electrical machines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0548244A1 (en) * 1990-09-10 1993-06-30 United Technologies Corporation Reduced noise commutator
EP0548244A4 (en) * 1990-09-10 1994-06-08 United Technologies Corp Reduced noise commutator
EP0966072A2 (en) * 1998-06-17 1999-12-22 Robert Bosch Gmbh Commutator device for electrical machines
EP0966072A3 (en) * 1998-06-17 2000-09-13 Robert Bosch Gmbh Commutator device for electrical machines

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