EP1000457A1 - Rotor for an electrical motor and method for producing the same - Google Patents

Rotor for an electrical motor and method for producing the same

Info

Publication number
EP1000457A1
EP1000457A1 EP99910140A EP99910140A EP1000457A1 EP 1000457 A1 EP1000457 A1 EP 1000457A1 EP 99910140 A EP99910140 A EP 99910140A EP 99910140 A EP99910140 A EP 99910140A EP 1000457 A1 EP1000457 A1 EP 1000457A1
Authority
EP
European Patent Office
Prior art keywords
rotor
winding
commutator
wires
additional winding
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Withdrawn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
EP99910140A
Other languages
German (de)
French (fr)
Inventor
Klaus Maldener
Ralf Schmidt
Martin Kiefer
Hans-Jörg FEES
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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
Priority claimed from DE19826886A external-priority patent/DE19826886A1/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1000457A1 publication Critical patent/EP1000457A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
    • 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
    • H02K13/04—Connections between commutator segments and windings
    • 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
    • Y10T29/49012—Rotor

Definitions

  • the invention is based on a rotor for an electric motor or on a method for producing the rotor according to the preamble of claim 1 and claim 6.
  • the individual, insulated winding wires of the rotor or armature winding are inserted m on the circumference of the axial grooves, which are offset in the form of a laminated laminated core, with the end faces of the individual ones
  • Coil winding wires protrude as so-called winding heads on the two end faces of the rotor body.
  • the individual connecting wires to the winding coils differ from the connecting lugs m formed on the individual commutator bars
  • the rotor according to the invention or the method according to the invention for producing the rotor with the characterizing features of claim 1 or claim 6 has the advantage that standard methods already used for rotor winding can be used without requiring special adaptations or additional parts to increase the stability of the jumper wires, so that no more vibrational breaks can occur during operation, particularly during shaking tests. It is particularly advantageous that the rotor according to the invention is suitable for high speeds. Advantageous further developments and improvements of the rotor specified in claim 1 or the method specified in claim 6 are possible through the measures listed in the subclaims.
  • the armature or rotor 1 for an electric motor shown in perspective in the drawing has a rotor body 4 designed as a laminated laminated core and a collector or commutator 7.
  • the rotor body 4 and the commutator 7 are both housed in a rotationally fixed manner on a common rotor shaft 9.
  • the rotor body 4 has axial grooves 11 distributed over the circumference, in which an armature or rotor winding 13 is wrapped.
  • the individual insulated rotor winding wires 14 of the rotor winding 13 are inserted in several positions in the axial slots 11 and form individual winding coils which are connected in an electrically conductive manner to the individual commutator segments 16 of the commutator 7 via connecting lugs 18.
  • the commutator lamellae 16 are arranged next to one another in the usual manner on the circumference of an insulating material body with a non-rotating seat on the rotor shaft 9 and not shown in the drawing, and extend over the entire axial length of the insulating material body.
  • the individual commutator lamellae 16 are provided with the connecting lugs 18, which are preferably formed in one piece, also called commutator hooks.
  • the connecting lugs 18 are angled on the end face of the commutator bars 16 facing the rotor body 4 and bent in the direction of the commutator bars 16 so that the individual connecting lugs 18 enclose a small acute angle with their commutator bars 16.
  • Connecting wires of the rotor winding 13, so-called switching conductors 20, which lead from the individual winding coils of the rotor winding 13 to the connecting lugs 18, are guided to the connecting lugs 18 using different hooking techniques.
  • the winding coils with so-called winding heads 17, which are configured as coil packs, protrude somewhat beyond an end face 15 of the rotor body 4 facing the commutator 7.
  • the hooking technique for example, is to be mentioned as the hooking technique, in which each jumper wire 20, starting from the axial groove 11 of the rotor body 4, does not lie opposite that of a winding coil center of the respective winding coil
  • Terminal lug 18 is guided, but to a circumferential direction by a certain angular distance, which is less than 360 degrees, offset terminal lug 18. But it is also possible to use the side hook winding technology (direct connection), in which a jumper wire 20 starting from the axial groove 11 of the Rotor body 4 is always guided to the terminal lug 18 opposite the center of the winding coil, without there being an angular distance in the circumferential direction. For contacting and fastening the jumper wires 20 to the
  • Terminal lugs 18 are looped around the terminal lugs 18 one or more times and mechanically and electrically attached to the terminal lugs 18 using known contact methods, for example by ultrasonic welding.
  • the rotor winding 13 with the Rotor winding wires 14 can be made by winding the rotor body 4 using a single wire. But it is also possible to manufacture the rotor winding 13 by winding two wires together as a so-called H winding, so that, for. B. two jumper wire ends 20 to the remaining remaining lugs 18 and firmly connected.
  • the jumper wires 20 running in the area between the rotor body 4 with its winding heads 17 and the connecting lugs 18 must be fixed in their position so that no winding breaks occur in the rotor winding 13 during operation and in particular during the demanding, shaking test for electric motors used in vehicle construction. Furthermore, this fixation is intended to counteract the centrifugal forces at higher speeds of the rotor 1.
  • the jumper wire 20 for this terminal lug 18 in the region between the winding head 17 projecting somewhat above the rotor body 4 and the commutator 7 is at least once around the connecting lugs 18 are guided around the jumper wires 20, after which only the terminal lug 18 which is ultimately remaining is then hooked on.
  • This additional winding 22 of the jumper wires 20 is provided at least once around the rotor shaft 9, so that this additional wire loop runs around the jumper wires 20 with at least 360 degrees in the circumferential direction around the rotor shaft 9.
  • This additional winding 22 of the jumper wires 20 can preferably be carried out several times around the rotor shaft 9, for.
  • the additional winding around the jumper wires 20 can be used for both single and double winding.
  • the rotor winding wires 14 have an insulating layer in a known manner.
  • this insulating layer can also be covered by a so-called baked enamel, which causes the individual wires 14, 20, 22 to bake together when the current flows in the wires 14, 20, 22.
  • the power supply to the wires 14, 20, 22 is provided after the additional winding 22 of the jumper wires 20, so that the jumper wires 20 are further stiffened by the baking by means of the baking varnish.
  • the baking is an irreversible hardening process of the baked enamel, which leads to a firm connection of the wires 14, 20, 22, which remains stable even when heated later.
  • the additional winding of the jumper wires 20 according to the invention is preferably used in commutators 7 with the winding of the terminal lugs 18.
  • a combination of the additional winding of the jumper wires 20 according to the invention with so-called side hook winding technology is also conceivable
  • Connection lugs (direct connection). It is particularly advantageous that existing winding machines and baking systems can be used with minor changes without the need for additional parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Motor Or Generator Current Collectors (AREA)

Abstract

In existing rotors for electrical motors, rotor winding wires stand the risk of breaking due to buffeting. The inventive rotor (1) for an electrical motor has a commutator (7), a rotor shaft (9) with a rotor winding (13) located on a rotor body (4) that is non-torsionally mounted on the rotor shaft (9). The commutator (7) has lamellae (16) extending next to each other in peripheral direction with an insulating gap and having terminal lugs (18) to connect the leads (20) of the rotor winding (13), whereby an additional winding (22) is made around the leads (2) in the area between the commutator (7) and the rotor body (4) for fixing or stabilizing the leads (20). The inventive rotor is designed for electrical motors in motor vehicle construction.

Description

Rotor für einen Elektromotor und Verfahren zum Herstellen des RotorsRotor for an electric motor and method for producing the rotor
Stand der TechnikState of the art
Die Erfindung geht aus von einem Rotor für einen Elektromotor bzw. von einem Verfahren zum Herstellen des Rotors nach der Gattung des Anspruchs 1 bzw. des Anspruchs 6.The invention is based on a rotor for an electric motor or on a method for producing the rotor according to the preamble of claim 1 and claim 6.
Bei Rotoren für Kommutator- oder Kollektormaschinen werden die einzelnen, isolierten Wicklungsdrähte der Rotor- oder Ankerwicklung m am Umfang des als laminiertes Blechpaket ausgeführten Rotorkörpers versetzt angeordnete Axialnuten eingelegt, wobei die Stirnseiten der zu einzelnenIn the case of rotors for commutator or collector machines, the individual, insulated winding wires of the rotor or armature winding are inserted m on the circumference of the axial grooves, which are offset in the form of a laminated laminated core, with the end faces of the individual ones
Wicklungsspulen gewickelten Wicklungsdrahte als sogenannte Wicklungsköpfe an den beiden Stirnseiten des Rotorkörpers vorstehen. Die einzelnen Anschlußdrahte zu den Wicklungsspulen sind zu an den einzelnen Kommutatorlamellen ausgebildeten Anschlußfahnen m unterschiedlicherCoil winding wires protrude as so-called winding heads on the two end faces of the rotor body. The individual connecting wires to the winding coils differ from the connecting lugs m formed on the individual commutator bars
Wickeltechnik geführt und dort durch Umschlingen der Anschlußfahnen und durch Umbiegen der Anschlußfahnen z . B . mittels Ultraschallverschweißung befestigt und elektrisch kontaktiert . Ein Ausfuhrungsbeispiel für einen sogenannten Hakenkommutator und für die Ausführung der sogenannten Anhaketechnik beim Festlegen der Wicklungsanschlußdrähte an den Kommutatorhaken ist m der WO 90/04864 beschrieben.Wrapping technology performed and there by looping the connecting lugs and by bending the connecting lugs z. B. attached by means of ultrasonic welding and electrically contacted. An exemplary embodiment for a so-called hook commutator and for the execution of the so-called Hooking technique when fixing the winding connection wires to the commutator hook is described in WO 90/04864.
Damit im Betrieb und insbesondere bei der üblicherweise geforderten, anspruchsvollen Schüttelprüfung des Rotors keine Schwingungsbrüche m der Rotorwicklung entstehen können, sind Zusatzmaßnahmen zur Fixierung bzw. Stabilisierung der Anschlußdrähte im Bereich zwischen den Anschlußfahnen und dem Rotorkörper erforderlich. Die einzelnen Anschlußdrähte der Wicklungsspulen, die zu den Anschlußfahnen der einzelnen Kommutatorlamellen fuhren, werden im folgenden als Schaltdrähte bezeichnet . Aus der DE 26 20 917 AI ist als Zusa zmaßnahme zur Fixierung bzw. Stabilisierung der Schaltdrähte bekannt, mehrere saugfähige Fäden oder Bänder über den gesamten Umfang um die freien Wicklungsenden zu legen. Etwas Derartiges ist jedoch fertigungstechnisch, insbesondere bei einer Massenherstellung des Rotors, aufwendig und verursacht erhebliche Kosten.Additional measures to fix or stabilize the connecting wires in the area between the connecting lugs and the rotor body are necessary so that no vibrational breaks can occur in the rotor winding during operation and in particular during the demanding shaking test of the rotor that is usually required. The individual connecting wires of the winding coils, which lead to the connecting lugs of the individual commutator bars, are referred to below as jumper wires. From DE 26 20 917 AI is known as Zusa measure to fix or stabilize the jumper wires to lay several absorbent threads or tapes over the entire circumference around the free winding ends. However, something of this kind is complex in terms of production technology, in particular when mass-producing the rotor, and causes considerable costs.
Vorteile der ErfindungAdvantages of the invention
Der erfindungsgemäße Rotor bzw. das erfindungsgemäße Verfahren zum Herstellen des Rotors mit den kennzeichnenden Merkmalen des Anspruchs 1 bzw. des Anspruchs 6 hat demgegenüber den Vorteil, daß bereits eingesetzte Standardverfahren zur Rotorwicklung verwendet werden können, ohne daß es besonderer Anpassungen oder zusätzlicher Teile bedarf, um die Stabilität der Schaltdrähte zu erhöhen, so daß im Betrieb, insbesondere bei der Schüttelprufung, keine Schwingungsbrüche mehr auftreten können. Besonders vorteilhaft ist, daß der erfindungsgemäße Rotor für hohe Drehzahlen geeignet ist. Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen Rotors bzw. des im Anspruch 6 angegebenen Verfahrens möglich.The rotor according to the invention or the method according to the invention for producing the rotor with the characterizing features of claim 1 or claim 6 has the advantage that standard methods already used for rotor winding can be used without requiring special adaptations or additional parts to increase the stability of the jumper wires, so that no more vibrational breaks can occur during operation, particularly during shaking tests. It is particularly advantageous that the rotor according to the invention is suitable for high speeds. Advantageous further developments and improvements of the rotor specified in claim 1 or the method specified in claim 6 are possible through the measures listed in the subclaims.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der Beschreibung näher erläutert .An embodiment of the invention is shown in simplified form in the drawing and explained in more detail in the description.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Der in der Zeichnung perspektivisch dargestellte Anker oder Rotor 1 für einen Elektromotor weist einen als laminiertes Blechpaket ausgeführten Rotorkörper 4 und einen Kollektor oder Kommutator 7 auf . Der Rotorkörper 4 und der Kommutator 7 sind beide auf einer gemeinsamen Rotorwelle 9 drehfest untergebracht. Der Rotorkörper 4 besitzt über den Umfang verteilt angeordnete Axialnuten 11, in die eine Anker- oder Rotorwicklung 13 eingewickelt ist. Die einzelnen isolierten Rotorwicklungsdrähte 14 der Rotorwicklung 13 sind dabei in mehreren Lagen in die Axialnuten 11 eingelegt und bilden einzelne Wicklungsspulen, die elektrisch leitend mit den einzelnen Kommutatorlamellen 16 des Kommutators 7 über Anschlußfahnen 18 verbunden sind. Die Kommutatorlamellen 16 sind in üblicher Weise auf dem Umfang eines in der Zeichnung nicht näher dargestellten, auf der Rotorwelle 9 drehfest sitzenden Isolierstoffkörpers mit dazwischenliegendem Isolierspalt nebeneinander angeordnet und erstrecken sich über die gesamte Axiallänge des Isolierstoffkörpers. Zum elektrischen Anschluß der Rotorwicklung 13 am Kommutator 7 sind die einzelnen Kommutatorlamellen 16 mit den vorzugsweise einstückig ausgebildeten Anschlußfahnen 18, auch Kommutatorhaken genannt, versehen. Die Anschlußfahnen 18 sind auf der dem Rotorkörper 4 zugewandten Stirnseite der Kommutatorlamellen 16 von diesem abgewinkelt und in Richtung zu den Kommutatorlamellen 16 hin umgebogen, so daß die einzelnen Anschlußfahnen 18 mit ihren Kommutatorlamellen 16 einen kleinen spitzen Winkel einschließen. Von den einzelnen Wicklungsspulen der Rotorwicklung 13 zu den Anschlußfahnen 18 führende Anschlußdrähte der Rotorwicklung 13, sogenannte Schaltleiter 20, sind in unterschiedlicher Anhaketechnik zu den Anschlußfahnen 18 geführt. Dabei ragen die zu Spulenpaketen ausgebildeten Wicklungsspulen mit sogenannten Wicklungsköpfen 17 etwas über eine dem Kommutator 7 zugewandten Stirnseite 15 des Rotorkörpers 4 hinaus. Als Anhaketechnik ist zum Beispiel die Umhaketechnik zu nennen, bei der jeder Schaltdraht 20 ausgehend von der Axialnut 11 des Rotorkörpers 4 nicht zu der einer Wicklungsspulenmitte der jeweiligen Wicklungsspule gegenüberliegendenThe armature or rotor 1 for an electric motor shown in perspective in the drawing has a rotor body 4 designed as a laminated laminated core and a collector or commutator 7. The rotor body 4 and the commutator 7 are both housed in a rotationally fixed manner on a common rotor shaft 9. The rotor body 4 has axial grooves 11 distributed over the circumference, in which an armature or rotor winding 13 is wrapped. The individual insulated rotor winding wires 14 of the rotor winding 13 are inserted in several positions in the axial slots 11 and form individual winding coils which are connected in an electrically conductive manner to the individual commutator segments 16 of the commutator 7 via connecting lugs 18. The commutator lamellae 16 are arranged next to one another in the usual manner on the circumference of an insulating material body with a non-rotating seat on the rotor shaft 9 and not shown in the drawing, and extend over the entire axial length of the insulating material body. For the electrical connection of the rotor winding 13 to the commutator 7, the individual commutator lamellae 16 are provided with the connecting lugs 18, which are preferably formed in one piece, also called commutator hooks. The connecting lugs 18 are angled on the end face of the commutator bars 16 facing the rotor body 4 and bent in the direction of the commutator bars 16 so that the individual connecting lugs 18 enclose a small acute angle with their commutator bars 16. Connecting wires of the rotor winding 13, so-called switching conductors 20, which lead from the individual winding coils of the rotor winding 13 to the connecting lugs 18, are guided to the connecting lugs 18 using different hooking techniques. The winding coils with so-called winding heads 17, which are configured as coil packs, protrude somewhat beyond an end face 15 of the rotor body 4 facing the commutator 7. The hooking technique, for example, is to be mentioned as the hooking technique, in which each jumper wire 20, starting from the axial groove 11 of the rotor body 4, does not lie opposite that of a winding coil center of the respective winding coil
Anschlußfahne 18 geführt wird, sondern zu einer in Umfangsrichtung um einen bestimmten Winkelabstand, der kleiner als 360 Grad ist, versetzten Anschlußfahne 18. Möglich ist aber auch, die Seitenhakenwicklungstechnik (Direktbeschaltung) zu verwenden, bei der ein Schaltdraht 20 ausgehend von der Axialnut 11 des Rotorkörpers 4 stets zu der der Wicklungsspulenmitte gegenüberliegenden Anschlußfahne 18 geführt wird, ohne daß dabei in Umfangsrichtung ein Winkelabstand vorliegt. Zur Kontaktierung und Befestigung der Schaltdrähte 20 an denTerminal lug 18 is guided, but to a circumferential direction by a certain angular distance, which is less than 360 degrees, offset terminal lug 18. But it is also possible to use the side hook winding technology (direct connection), in which a jumper wire 20 starting from the axial groove 11 of the Rotor body 4 is always guided to the terminal lug 18 opposite the center of the winding coil, without there being an angular distance in the circumferential direction. For contacting and fastening the jumper wires 20 to the
Anschlußfahnen 18 werden diese einmal oder mehrmals um die Anschlußfahnen 18 herumgeschlungen und mit bekannten Kontaktverfahren, beispielsweise durch Ultraschallverschweißen, mechanisch und elektrisch an den Anschlußfahnen 18 befestigt. Die Rotorwicklung 13 mit den Rotorwicklungsdrähten 14 kann durch Wickeln des Rotorkörpers 4 mit Hilfe eines einzigen Drahtes hergestellt werden. Es ist aber auch möglich, die Rotorwicklung 13 durch gemeinsames Wickeln zweier Drähte als sogenannte H-Wicklung herzustellen, so daß z. B. zwei Schaltdrahtenden 20 an die noch restlich verbleibenden Anschlußfahnen 18 geführt und fest verbunden werden.Terminal lugs 18 are looped around the terminal lugs 18 one or more times and mechanically and electrically attached to the terminal lugs 18 using known contact methods, for example by ultrasonic welding. The rotor winding 13 with the Rotor winding wires 14 can be made by winding the rotor body 4 using a single wire. But it is also possible to manufacture the rotor winding 13 by winding two wires together as a so-called H winding, so that, for. B. two jumper wire ends 20 to the remaining remaining lugs 18 and firmly connected.
Die im Bereich zwischen dem Rotorkörper 4 mit seinen Wicklungsköpfen 17 und den Anschlußfahnen 18 verlaufenden Schaltdrähte 20 müssen in ihrer Lage fixiert werden, damit im Betrieb und insbesondere bei der geforderten, anspruchsvollen Schüttelprüfung für im Fahrzeugbau eingesetzte Elektromotoren keine Wicklungsbrüche in der Rotorwicklung 13 auftreten. Des weiteren soll mittels dieser Fixierung den Fliehkräften bei höheren Drehzahlen des Rotors 1 entgegengewirkt werden. Zum Fixieren dieser Schaltdrähte 20 wird erfindungsgemäß vor dem letztmaligen Anhaken einer noch restlich verbleibenden, noch nicht kontaktierten Anschlußfahne 18 der Schaltdraht 20 für diese Anschlußfahne 18 im Bereich zwischen dem etwas über den Rotorkörper 4 ragenden Wickelkopf 17 und dem Kommutator 7 zumindest einmal um die bereits zu den Anschlußfahnen 18 geführten Schaltdrähte 20 herumgeführt, wonach anschließend erst die letztlich verbleibende Anschlußfahne 18 angehakt wird. Diese zusätzliche Umwicklung 22 der Schaltdrähte 20 ist zumindest einmal um die Rotorwelle 9 herum vorgesehen, so daß diese zusätzliche Drahtschlaufe mit mindestens 360 Grad in Umfangsrichtung um die Rotorwelle 9 anliegend an den Schaltdrähten 20 umläuft. Vorzugsweise kann diese zusätzliche Umwicklung 22 der Schaltdrähte 20 mehrfach um die Rotorwelle 9 durchgeführt werden, z. B. drei- bis fünfmal . Das zusätzliche Umwickeln der Schaltdrähte 20 ist sowohl für Einfach- als auch für die Doppelwicklung einsetzbar. Die Rotorwicklungsdrähte 14 besitzen in bekannter Weise eine Isolierschicht. Zusätzlich kann diese Isolierschicht noch von einem sogenannten Backlack ummantelt sein, welcher bei Stromfluß in den Drähten 14, 20, 22 durch Erwärmung ein Zusammenbacken der einzelnen Drähte 14, 20, 22 bewirkt. Die Stromzufuhr zu den Drähten 14, 20, 22 ist nach der zusätzlichen Umwicklung 22 der Schaltdrähte 20 vorgesehen, so daß eine weitere Versteifung der Schaltdrähte 20 durch das Verbacken mittels dem Backlack erfolgt. Bei dem Verbacken handelt es sich um einen unumkehrbaren Aushärteprozeß des Backlacks, der zu einer festen Verbindung der Drähte 14, 20, 22 führt, die auch bei einer späteren Erwärmung stabil bleibt. Die erfindungsgemäße zusätzliche Umwicklung der Schaltdrähte 20 wird vorzugsweise bei Kommutatoren 7 mit Umhakenwicklung der Anschlußfahnen 18 eingesetzt. Denkbar ist aber auch eine Kombination der erfindungsgemäßen zusätzlichen Umwicklung der Schaltdrähte 20 mit sogenannter Seitenhakenwicklungstechnik derThe jumper wires 20 running in the area between the rotor body 4 with its winding heads 17 and the connecting lugs 18 must be fixed in their position so that no winding breaks occur in the rotor winding 13 during operation and in particular during the demanding, shaking test for electric motors used in vehicle construction. Furthermore, this fixation is intended to counteract the centrifugal forces at higher speeds of the rotor 1. To fix these jumper wires 20, according to the invention, before the last hooking on of a remaining, not yet contacted terminal lug 18, the jumper wire 20 for this terminal lug 18 in the region between the winding head 17 projecting somewhat above the rotor body 4 and the commutator 7 is at least once around the connecting lugs 18 are guided around the jumper wires 20, after which only the terminal lug 18 which is ultimately remaining is then hooked on. This additional winding 22 of the jumper wires 20 is provided at least once around the rotor shaft 9, so that this additional wire loop runs around the jumper wires 20 with at least 360 degrees in the circumferential direction around the rotor shaft 9. This additional winding 22 of the jumper wires 20 can preferably be carried out several times around the rotor shaft 9, for. B. three to five times. The additional winding around the jumper wires 20 can be used for both single and double winding. The rotor winding wires 14 have an insulating layer in a known manner. In addition, this insulating layer can also be covered by a so-called baked enamel, which causes the individual wires 14, 20, 22 to bake together when the current flows in the wires 14, 20, 22. The power supply to the wires 14, 20, 22 is provided after the additional winding 22 of the jumper wires 20, so that the jumper wires 20 are further stiffened by the baking by means of the baking varnish. The baking is an irreversible hardening process of the baked enamel, which leads to a firm connection of the wires 14, 20, 22, which remains stable even when heated later. The additional winding of the jumper wires 20 according to the invention is preferably used in commutators 7 with the winding of the terminal lugs 18. However, a combination of the additional winding of the jumper wires 20 according to the invention with so-called side hook winding technology is also conceivable
Anschlußfahnen (Direktbeschaltung) . Von besonderem Vorteil ist dabei, daß vorhandene Wickelmaschinen und Verbackungsanlagen mit geringen Änderungen verwendet werden können, ohne daß zusätzliche Teile benötigt werden.Connection lugs (direct connection). It is particularly advantageous that existing winding machines and baking systems can be used with minor changes without the need for additional parts.
Denkbar ist auch, diese zusätzliche Umwicklung 22 erst nach dem Anhaken aller Anschlußfahnen 18 durchzuführen, so daß der hierzu vorgesehene Draht für den Fall der Einfachwicklung ein freies Drahtende ohne Verbindung zu einer Anschlußfahne 18 aufweist. Für den Fall einer Doppelwicklung ergeben sich entsprechend zwei freie Drahtenden. Das Verbacken der Schaltdrähte 20 kann durch äußere Wärmezufuhr an den Rotor 1 zumindest im Bereich der zusätzlichen Umwicklung 22 bewerkstelligt werden. It is also conceivable to carry out this additional winding 22 only after all the connecting lugs 18 have been hooked on, so that the wire provided for this purpose has a free wire end without connection to a connecting lug 18 in the case of the single winding. In the case of a double winding, there are two free wire ends. Baking of the jumper wires 20 can be accomplished by external heat supply to the rotor 1 at least in the area of the additional winding 22.

Claims

Patentansprüche claims
1. Rotor für einen Elektromotor, mit einer Rotorwelle mit Rotorwicklung, die in einem auf der Rotorwelle drehfest sitzenden Rotorkörper aufgenommen ist, mit einem Kommutator, der in Umfangsrichtung mit Isolierspalt nebeneinanderliegende Kommutatorlamellen aufweist, die Anschlußfahnen zum Anschließen von Anschlußdrähten der Rotorwicklung besitzen, dadurch gekennzeichnet, daß im Bereich zwischen Kommutator (7) und Rotorkörper (4) eine zusätzliche Umwicklung (22) um die Anschlußdrähte (20) durchgeführt ist.1.Rotor for an electric motor, with a rotor shaft with rotor winding, which is accommodated in a rotor body which is seated in a rotationally fixed manner on the rotor shaft, with a commutator which has commutator fins lying next to one another in the circumferential direction with an insulating gap and which have connecting lugs for connecting connecting wires of the rotor winding that in the area between the commutator (7) and the rotor body (4) an additional winding (22) is carried out around the connecting wires (20).
2. Rotor nach Anspruch 1, dadurch gekennzeichnet, daß Rotorwicklungsdrähte (14) der Rotorwicklung (13) diese zusätzliche Umwicklung (22) bilden.2. Rotor according to claim 1, characterized in that rotor winding wires (14) of the rotor winding (13) form this additional winding (22).
3. Rotor nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß diese zusätzliche Umwicklung (22) mehrfach durchgeführt ist.3. Rotor according to claim 1 or 2, characterized in that this additional winding (22) is carried out several times.
4. Rotor nach Anspruch 3, dadurch gekennzeichnet, daß diese zusätzliche Umwicklung (22) drei- bis fünfmal durchgeführt ist . 4. Rotor according to claim 3, characterized in that this additional winding (22) is carried out three to five times.
5. Rotor nach Anspruch 1, dadurch gekennzeichnet, daß diese zusätzliche Umwicklung (22) vor dem Anhaken einer noch letztlich verbleibenden Anschlußfahne (18) des Kommutators (7) erfolgt.5. Rotor according to claim 1, characterized in that this additional winding (22) takes place before the hooking of a terminal lug (18) of the commutator (7) which is still ultimately left.
6. Verfahren zum Herstellen eines Rotors nach dem Oberbegriff des Anspruchs 1, dadurch gekennzeichnet, daß im Bereich zwischen Kommutator (7) und Rotorkörper (4) eine zusätzliche Umwicklung (22) um die Anschlußdrähte (20) durchgeführt wird, wonach zumindest der Bereich der zusätzlichen Umwicklung (22) erwärmt wird, so daß es zu einem Verbacken eines Backlacks kommt, der die Drähte (14, 20, 22) ummantelt.6. A method for producing a rotor according to the preamble of claim 1, characterized in that in the area between the commutator (7) and the rotor body (4) an additional winding (22) is carried out around the connecting wires (20), after which at least the area of additional winding (22) is heated so that there is a baking of a baking varnish, which coats the wires (14, 20, 22).
7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß Rotorwicklungsdrähte (14) der Rotorwicklung (13) diese zusätzliche Umwicklung (22) bilden.7. The method according to claim 6, characterized in that rotor winding wires (14) of the rotor winding (13) form this additional winding (22).
8. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß zur Erwärmung zumindest des Bereichs der zusätzlichen8. The method according to claim 6, characterized in that for heating at least the area of the additional
Umwicklung (22) elektrischer Strom durch die Drähte (14, 20, 22) geleitet wird.Wrapping (22) electrical current through the wires (14, 20, 22) is passed.
9. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß diese zusätzliche Umwicklung (22) mehrfach durchgeführt wird.9. The method according to claim 6, characterized in that this additional winding (22) is carried out several times.
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß diese zusätzliche Umwicklung (22) drei- bis fünfmal durchgeführt wird.10. The method according to claim 9, characterized in that this additional winding (22) is carried out three to five times.
11. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß diese zusätzliche Umwicklung (22) vor dem Anhaken einer noch letztlich verbleibenden Anschlußfahne (18) des Kommutators (7) durchgeführt wird. 11. The method according to claim 6, characterized in that this additional winding (22) is carried out before the hooking of a terminal lug (18) of the commutator (7) which is still ultimately left.
12. Verfahren nach Anspruch 6 oder 11, dadurch gekennzeichnet, daß zur Erwärmung zumindest des Bereichs der zusätzlichen Umwicklung (22) Wärme von außen zum Rotor (1) zugeführt wird . 12. The method according to claim 6 or 11, characterized in that for heating at least the area of the additional winding (22) heat is supplied from the outside to the rotor (1).
EP99910140A 1998-05-28 1999-02-15 Rotor for an electrical motor and method for producing the same Withdrawn EP1000457A1 (en)

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Application Number Priority Date Filing Date Title
DE19823851 1998-05-28
DE19823851 1998-05-28
DE19826886 1998-06-17
DE19826886A DE19826886A1 (en) 1998-05-28 1998-06-17 Rotor for an electric motor and method for manufacturing the rotor
PCT/DE1999/000412 WO1999062166A1 (en) 1998-05-28 1999-02-15 Rotor for an electrical motor and method for producing the same

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JP2002517154A (en) 2002-06-11
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