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WO1992002982A1 - Rotatory-field motor - Google Patents

Rotatory-field motor Download PDF

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Publication number
WO1992002982A1
WO1992002982A1 PCT/EP1991/001480 EP9101480W WO9202982A1 WO 1992002982 A1 WO1992002982 A1 WO 1992002982A1 EP 9101480 W EP9101480 W EP 9101480W WO 9202982 A1 WO9202982 A1 WO 9202982A1
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WO
WIPO (PCT)
Prior art keywords
winding
motor according
stator
parts
strand
Prior art date
Application number
PCT/EP1991/001480
Other languages
German (de)
French (fr)
Inventor
Wilfried Leutner
Original Assignee
Zahnradfabrik Friedrichshafen 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 Zahnradfabrik Friedrichshafen Ag filed Critical Zahnradfabrik Friedrichshafen Ag
Publication of WO1992002982A1 publication Critical patent/WO1992002982A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/18—Windings for salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles

Definitions

  • the invention relates to a rotating field motor, in particular for use in motor vehicles, according to the preamble of claim 1.
  • a rotor is rotatably mounted in a stator.
  • the rotor has a number of poles.
  • the stator has a stator lamination stack with a number of slots and webs, a loop winding with a plurality of winding strands being arranged in the slots.
  • an electric motor If an electric motor is to be operated with a low voltage, which, for example, is generally less than 12 volts when used in a motor vehicle, the electric motor must be able to cope with high currents. This requires a very small motor resistance, i. that is, the windings must be designed with low resistance. Therefore either very thick wires or a lot of wires connected in parallel must be used. The manufacture of such a winding is therefore very difficult and expensive.
  • the invention has for its object to provide a rotary field motor, the winding of which is easier and cheaper to manufacture.
  • the relationship between construction volume and performance should be improved.
  • the rotating field motor characterized in claim 1.
  • the ratio of the number of slots and lands of the stator to the number of poles of the rotor is set at 3: 2.
  • Each winding strand of the loop winding is arranged in several turns around a web of the stator core in two adjacent slots.
  • the winding strands are made of flat wire.
  • Flat wire can be used.
  • the use of flat wire was not possible with conventional loop windings because the large number of crossovers, on the one hand, could not be achieved economically due to the large number of complicated bending processes and, on the other hand, could not be accommodated in an acceptable installation space.
  • each winding strand consists of two parts which are arranged radially one above the other around the web. If parts of the winding strands lying radially one above the other are then wound in opposite directions, the respective inner winding ends can be connected to one another in a simple manner with the same electrical current flow, or the two parts of the winding strands can be produced from a continuous flat wire. The flat wire is folded twice to connect the inner winding ends.
  • the webs are designed such that they have a rectangular cross section, as seen perpendicular to the axis of the stator, then grooves with a trapezoidal cross section are formed between the webs. If these grooves are filled in such a way that the winding strand around a web consists of two parts with the same dimensions in the tangential direction of the stator laminated core and the winding strand of the adjacent web consists of two parts, of which the radially outer one has a larger dimension in the tangential direction of the stator laminated core has as the radially inner part, a particularly good degree of filling is achieved in that two adjacent winding strands almost completely fill the free cross section of the jointly filled groove.
  • each winding strand is composed of two parts gives the additional advantageous possibility of leading out the two connection ends of a winding strand on one side of the stator lamination stack. As a result, both ends of a winding strand are accessible from the outside.
  • the associated connection ends of the winding strands forming a phase can be connected to one another in a simple manner.
  • Fig. 1 is a view of the invention
  • Rotary field motor in the axial direction with a partial cross section, with two of the winding strands removed;
  • 2C shows a plan view of two superimposed parts of different dimensions of a winding strand
  • Fig. 4 shows the scheme of the invention
  • Fig. 5 is a view of the rotary field motor in
  • the rotating field motor has a stator 1 in which a rotor 2 is rotatably mounted.
  • the rotor 2 carries a number of poles 3, which as
  • the stator 1 has a stator laminated core 4, on which a number of webs 5 with grooves 6 in between are formed.
  • the ratio of the number of slots 6 and webs 5 of the stator 1 to the number of poles 3 of the rotor 2 is 3: 2.
  • the stator 1 also includes a loop winding with a plurality of winding strands 7 and 8.
  • the winding strands 7 and 8 consist of flat wire. Each winding strand 7 or 8 is wound around a web 5, so that its turns are each in a groove 6, which is adjacent to the web 5.
  • the webs 5 have a rectangular cross section perpendicular to the axis of the stator 1, so that the shape of the webs 5 is cuboid.
  • winding strand 7 and 8 consists of several parts which are arranged radially one above the other. From the further description it is clear that it is advantageous if a winding strand 7 or 8 consists of an even number of parts.
  • winding strands are shown that consist of two parts.
  • the winding strand 7 consists of two parts 10 with the same dimensions, in particular in the tangential direction of the stator core 4.
  • the winding strand 8 consists of two parts 11 and 12 with different dimensions, in particular in the tangential direction of the
  • the radially outer part 12 has a larger dimension than the radially inner part 11.
  • the dimensions of the two identical parts 10 of the winding strand 7 are expediently equal in their dimensions to the radially inner part 11 of the winding strand 8. If a winding strand 7 with identical parts 10 and a winding strand 8 with dissimilar parts 11 and 12 are alternately arranged side by side, the grooves 6 are almost completely filled.
  • the different dimensions of the two parts 11 and 12 are achieved in that, with the same wire cross section for both parts, the radially outer part is produced with a correspondingly larger number of turns.
  • connection of the inner winding ends 13 and 14 of the two parts 10 or 11 and 12 can expediently be established in that the flat wire is folded twice at approximately 45 ° by 90 °.
  • the connection is particularly good if the two parts are made from a single, continuous piece of flat wire.
  • the formation of the connection point with the folds is shown in Fig. 3 in two views.
  • connection ends 15 and 16 of each winding strand are directed towards the same side of the stator core 4 and are easily accessible from the outside. That's why it's with one three-phase motor very easy to connect the associated connection ends of the winding strands 7 and 8 belonging to one phase, as shown schematically in FIG. 4.
  • the respective connection ends are designated U, V, W at the input and X, Y, Z at the output.
  • Every third winding strand belongs to a phase and is connected to its associated winding strands. For this purpose, for example, a long connection end of a winding strand with a short connection end of its third next
  • Winding strand connected by a single solder joint.
  • the connection ends X, Y, Z are connected in a star point S.
  • the connections of the winding strands are the only wires that cross over in the winding head.
  • FIG. 5 shows the connections of the individual winding strands in a top view of the induction motor.
  • Each four winding strands Ul, U2, U3, U4 are connected to each other and to the connection ends ü and X, correspondingly the winding strands VI, V2, V3, V4 or Wl, W2, W3, W4 are connected to each other and to the connection ends V and Y or W and Z connected.
  • the winding strands U4, V4, W4 are connected to one another at the star point S.
  • connection ends V and Y are provided with a grid.
  • the winding strands 7 and 8 are expediently manufactured outside the motor with the aid of a winding mandrel.
  • the finished winding strands are then pushed onto the webs 5 radially from the inside.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

A rotatory-field motor has a rotor (2) rotatably mounted in a stator (1). The rotor (2) has a number of poles (3). The stator (1) has armature stampings (4) with a number of grooves (6) and ridges (5). The ratio of the number of grooves (6) and ridges (5) of the stator (1) to the number of poles (3) of the rotor (2) is 3:2. Each winding section (7, 8) of a lap winding is disposed in several coils around a ridge (5) in two grooves (6) of the armature stampings (4) adjacent to the ridge and consists of two parts (10, 11, 12) arranged radially one above the other on the ridge (5). The winding sections (7, 8) are made of flat wire.

Description

Drehfeldmotor Three-phase motor
Die Erfindung betrifft einen Drehfeldmotor, insbesondere für den Einsatz in Kraftfahrzeugen, nach dem Oberbegriff des Anspruches 1.The invention relates to a rotating field motor, in particular for use in motor vehicles, according to the preamble of claim 1.
Bekannte Drehfeldmotoren weisen folgende Merkmale auf: Ein Rotor ist in einem Stator drehbar gelagert. Der Rotor weist eine Anzahl von Polen auf. Der Stator weist ein Statorblechpaket mit einer Anzahl von Nuten und Stegen auf, wobei in den Nuten eine Schleifenwicklung mit mehreren Wickelsträngen angeordnet ist.Known three-phase motors have the following features: A rotor is rotatably mounted in a stator. The rotor has a number of poles. The stator has a stator lamination stack with a number of slots and webs, a loop winding with a plurality of winding strands being arranged in the slots.
Soll ein Elektromotor mit einer niedrigen Spannung betrieben werden, die beispielsweise bei einem Einsatz in einem Kraftfahrzeug im allgemeinen kleiner als 12 Volt ist, so muß der Elektromotor hohe Ströme verkraften. Dies bedingt einen sehr kleinen Motorwiderstand, d. h., die Wicklungen müssen niederohmig ausgelegt werden. Deshalb müssen entweder sehr dicke Drähte oder aber viele parallel geschaltete Drähte verwendet werden. Die Herstellung einer solchen Wicklung ist deshalb sehr schwierig und kostenintensiv.If an electric motor is to be operated with a low voltage, which, for example, is generally less than 12 volts when used in a motor vehicle, the electric motor must be able to cope with high currents. This requires a very small motor resistance, i. that is, the windings must be designed with low resistance. Therefore either very thick wires or a lot of wires connected in parallel must be used. The manufacture of such a winding is therefore very difficult and expensive.
Bei bisher üblichen Schleifenwicklungen wurde ein Draht durch eine Nut des Statorblechpaketes hineingeführt und durch eine andere Nut herausgeführt. Um die Nuten möglichst vollständig mit Draht zu füllen, wurden mehrere Windungen eines Wickelstranges durch die beiden Nuten gelegt. Zwischen den beiden Nuten eines Wickelstranges lagen bei einem dreiphasigen Motor zwei Nuten, in denen jeweils die Wickelstränge der beiden anderen Phasen aufgenommen wurden. Durch diese Arten der Schleifenwicklung entstanden sehr viele Kreuzungen undIn the case of loop windings customary up to now, a wire was inserted through a groove in the stator laminated core and led out through another groove. In order to fill the slots as completely as possible with wire, several turns of a winding strand were placed through the two slots. In the case of a three-phase motor, there were two slots between the two slots of a winding strand, in each of which the winding strands of the other two phases were accommodated. This type of loop winding resulted in a large number of crossings and
Überschneidungen der Drähte der einzelnen Wickelstränge, so daß sich sehr dicke Wickelköpfe ergaben. Mit der Verwendung von Runddraht für die Wicklungen ergab sich der Nachteil eines schlechten Füllgrades, der das Verhältnis zwischen Leitermaterial und Luft im Wickelraum wiederspiegelt. Sowohl durch die Art der Wicklung als auch durch den schlechten Füllgrad ergaben sich ein niedriger Wirkungsgrad und ein großes Bauvolumen der Elektromotoren.Overlaps of the wires of the individual winding strands, so that very thick end windings resulted. The use of round wire for the windings resulted in the disadvantage of a poor degree of filling, which reflects the relationship between conductor material and air in the winding space. Both the type of winding and the poor filling level resulted in low efficiency and a large volume of the electric motors.
Der Erfindung liegt die Aufgabe zugrunde, einen Drehfeldmotor zu schaffen, dessen Wicklung einfacher und billiger herzustellen ist. Außerdem soll das Verhältnis von Bauvolumen und Leistung verbessert werden.The invention has for its object to provide a rotary field motor, the winding of which is easier and cheaper to manufacture. In addition, the relationship between construction volume and performance should be improved.
Diese Aufgabe wird erfindungsgemäß durch den im Anspruch 1 gekennzeichneten Drehfeldmotor gelöst. Dazu wird das Verhältnis der Anzahl der Nuten und Stege des Stators zu der Anzahl der Pole des Rotors auf 3:2 festgelegt. Jeder Wickelstrang der Schleifenwicklung wird in mehreren Windungen um einen Steg des Statorblechpakets in zwei benachbarten Nuten angeordnet. Die Wickelstränge bestehen aus Flachdraht.This object is achieved by the rotating field motor characterized in claim 1. For this purpose, the ratio of the number of slots and lands of the stator to the number of poles of the rotor is set at 3: 2. Each winding strand of the loop winding is arranged in several turns around a web of the stator core in two adjacent slots. The winding strands are made of flat wire.
Durch die Auswahl des Verhältnisses der Anzahl von Nuten und Stegen des Stators zu der Anzahl der Pole des Rotors und durch die besondere Schleifenwicklung ist es möglich, daß jeder Steg für sich alleine umwickelt ist. Dadurch liegt immer ein Wickelstrang neben dem anderen, so daß alle Uberkreuzungen der Windungen der einzelnen Wickelstränge untereinander vermieden werden. Nur die Verbindungen zwischen den Wickelsträngen, die gemeinsam zu einer Phase gehören, überkreuzen sich. Dadurch entstehen sehr kleine Wickelköpfe. Wegen den fehlenden Überkreuzungen in den Wickelsträngen und wegen der geringen Anzahl der Uberkreuzungen der Verbindungen kann für die einzelnen Windungen der Wickelstränge und für deren VerbindungenBy selecting the ratio of the number of slots and webs of the stator to the number of poles of the rotor and by means of the special loop winding, it is possible for each web to be wrapped by itself. As a result, one winding strand is always next to the other, so that all crossovers of the turns of the individual winding strands with one another are avoided. Only the connections between the winding strands that together belong to one phase cross each other. This creates very small end windings. Because of the missing crossings in the winding strands and because of the small number of crossings of the connections, it is possible for the individual turns of the winding strands and for their connections
Flachdraht verwendet werden. Die Verwendung von Flachdraht war bei bisher üblichen Schleifenwicklungen nicht möglich, weil die Vielzahl von Überkreuzungen einerseits wegen der Vielzahl komplizierter Biegevorgänge wirtschaftlich nicht verwirklicht werden konnte und andererseits nicht in einem akzeptablen Bauraum untergebracht werden konnte.Flat wire can be used. The use of flat wire was not possible with conventional loop windings because the large number of crossovers, on the one hand, could not be achieved economically due to the large number of complicated bending processes and, on the other hand, could not be accommodated in an acceptable installation space.
Zweckmäßige und vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben. Besonders vorteilhaft ist es, wenn jeder Wickelstrang aus zwei Teilen besteht, die radial übereinander um den Steg herum angeordnet sind. Werden dann zusätzlich radial übereinanderliegende Teile der Wickelstränge gegensinnig gewickelt, so können bei gleichsinnigem elektrischem Stromfluß die jeweils innenliegenden Wickelenden auf einfache Weise miteinander verbunden werden, bzw. die beiden Teile der Wickelstränge können aus einem fortlaufenden Flachdraht hergestellt werden. Für die Verbindung der innenliegenden Wicklungsenden wird der Flachdraht zweifach gefalzt.Expedient and advantageous embodiments of the invention are specified in the subclaims. It is particularly advantageous if each winding strand consists of two parts which are arranged radially one above the other around the web. If parts of the winding strands lying radially one above the other are then wound in opposite directions, the respective inner winding ends can be connected to one another in a simple manner with the same electrical current flow, or the two parts of the winding strands can be produced from a continuous flat wire. The flat wire is folded twice to connect the inner winding ends.
Werden die Stege gemäß einer weiteren zweckmäßigen Ausführungsform derart ausgebildet, daß sie, senkrecht zur Achse des Stators gesehen, einen rechteckigen Querschnitt aufweisen, so entstehen zwischen den Stegen Nuten mit trapezförmigem Querschnitt. Werden diese Nuten nun derart befüllt, daß der Wickelstrang um einen Steg aus zwei Teilen mit gleichen Abmessungen in tangentialer Richtung des Statorblechpakets besteht und der Wickelstrang des benachbarten Steges aus zwei Teilen besteht, von denen der radial außen liegende eine größere Abmessung in tangentialer Richtung des Statorblechpakets aufweist als der radial innen liegende Teil, so wird ein besonders guter Füllgrad dadurch erreicht, daß je zwei benachbarte Wickelstränge den freien Querschnitt der gemeinsam befüllten Nut nahezu vollständig ausfüllen. Aus der Tatsache, daß jeder Wickelstrang aus zwei Teilen zusammengesetzt ist, ergibt sich die zusätzliche vorteilhafte Möglichkeit, die beiden Anschlußenden eines Wickelstranges auf einer Seite des Statorblechpakets herauszuführen. Dadurch sind beide Enden eines Wickelstranges von außen zugänglich. Die zusammengehörigen Anschlußenden der eine Phase bildenden Wickelstränge können auf einfache Art und Weise miteinander verbunden werden..If, according to a further expedient embodiment, the webs are designed such that they have a rectangular cross section, as seen perpendicular to the axis of the stator, then grooves with a trapezoidal cross section are formed between the webs. If these grooves are filled in such a way that the winding strand around a web consists of two parts with the same dimensions in the tangential direction of the stator laminated core and the winding strand of the adjacent web consists of two parts, of which the radially outer one has a larger dimension in the tangential direction of the stator laminated core has as the radially inner part, a particularly good degree of filling is achieved in that two adjacent winding strands almost completely fill the free cross section of the jointly filled groove. The fact that each winding strand is composed of two parts gives the additional advantageous possibility of leading out the two connection ends of a winding strand on one side of the stator lamination stack. As a result, both ends of a winding strand are accessible from the outside. The associated connection ends of the winding strands forming a phase can be connected to one another in a simple manner.
Die Erfindung ist nicht auf die Merkmalskombinationen der Ansprüche beschränkt. Für den Fachmann ergeben sich weitere sinnvolle Kombinationsmδglichkeiten von Ansprüchen und einzelnen Anspruchsmerkmalen aus der Aufgabenstellung.The invention is not limited to the combinations of features of the claims. For the person skilled in the art, there are further useful combinations of claims and individual claim characteristics from the task.
Im folgenden wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert. Es zeigenThe invention is explained in more detail below with reference to an embodiment shown in the drawing. Show it
Fig. 1 eine Ansicht des erfindungsgemäßenFig. 1 is a view of the invention
Drehfeldmotors in axialer Richtung mit einem Teilquerschnitt, wobei zwei der Wickelstränge entfernt sind;Rotary field motor in the axial direction with a partial cross section, with two of the winding strands removed;
Fig. 2A/B je eine Draufsicht auf die Teile unterschiedlicher Abmessungen eines Wickelstranges;2A / B each a top view of the parts of different dimensions of a winding strand;
Fig. 2C eine Draufsicht auf zwei übereinanderliegende Teile unterschiedlicher Abmessungen eines Wickelstranges;2C shows a plan view of two superimposed parts of different dimensions of a winding strand;
Fig. 3 die Verbindung der innenliegendenFig. 3 the connection of the inner
Wicklungsenden der beiden Teile eines Wickelstranges in zwei Ansichten; Fig. 4 das Schema der erfindungsgemäßenWinding ends of the two parts of a winding strand in two views; Fig. 4 shows the scheme of the invention
Schleifenwicklung für einen 3-Phasen-Motor in einer Abwicklung;Loop winding for a 3-phase motor in one development;
Fig. 5 eine Ansicht des Drehfeldmotors in zuFig. 5 is a view of the rotary field motor in
Fig. 1 entgegengesetzter Richtung.Fig. 1 opposite direction.
Der erfindungsgemäße Drehfeldmotor weist einen Stator 1 auf, in dem ein Rotor 2 drehbar gelagert ist. Der Rotor 2 trägt eine Anzahl von Polen 3, die alsThe rotating field motor according to the invention has a stator 1 in which a rotor 2 is rotatably mounted. The rotor 2 carries a number of poles 3, which as
Dauermagnete ausgebildet sind. Der Stator 1 weist ein Statorblechpaket 4 auf, an dem eine Anzahl von Stegen 5 mit dazwischenliegenden Nuten 6 ausgebildet ist. Das Verhältnis der Anzahl der Nuten 6 und Stege 5 des Stators 1 zu der Anzahl der Pole 3 des Rotors 2 beträgt 3:2.Permanent magnets are formed. The stator 1 has a stator laminated core 4, on which a number of webs 5 with grooves 6 in between are formed. The ratio of the number of slots 6 and webs 5 of the stator 1 to the number of poles 3 of the rotor 2 is 3: 2.
Zu dem Stator 1 gehört außerdem eine Schleifenwicklung mit mehreren Wickelsträngen 7 und 8. Die Wickelstränge 7 und 8 bestehen aus Flachdraht. Jeder Wickelstrang 7 bzw. 8 ist um einen Steg 5 herum gewickelt, so daß seine Windungen in je einer Nut 6 liegen, die dem Steg 5 benachbart ist.The stator 1 also includes a loop winding with a plurality of winding strands 7 and 8. The winding strands 7 and 8 consist of flat wire. Each winding strand 7 or 8 is wound around a web 5, so that its turns are each in a groove 6, which is adjacent to the web 5.
Die Stege 5 weisen senkrecht zur Achse des Stators 1 einen rechteckigen Querschnitt auf, so daß die Form der Stege 5 quaderartig ausgebildet ist.The webs 5 have a rectangular cross section perpendicular to the axis of the stator 1, so that the shape of the webs 5 is cuboid.
Jeder Wickelstrang 7 und 8 besteht aus mehreren Teilen, die radial übereinander angeordnet sind. Aus der weiteren Beschreibung wird deutlich, daß es vorteilhaft ist, wenn ein Wickelstrang 7 bzw. 8 aus einer geraden Zahl von Teilen besteht. In dem Ausführungsbeispiel sind Wickelstränge dargestellt, die aus zwei Teilen bestehen. Dabei besteht der Wickelstrang 7 aus zwei Teilen 10 mit gleichen Abmessungen, insbesondere in tangentialer Richtung des Statorblechpakets 4. Der Wickelstrang 8 besteht aus zwei Teilen 11 und 12 mit unterschiedlichen Abmessungen, insbesondere in tangentialer Richtung desEach winding strand 7 and 8 consists of several parts which are arranged radially one above the other. From the further description it is clear that it is advantageous if a winding strand 7 or 8 consists of an even number of parts. In the exemplary embodiment, winding strands are shown that consist of two parts. The winding strand 7 consists of two parts 10 with the same dimensions, in particular in the tangential direction of the stator core 4. The winding strand 8 consists of two parts 11 and 12 with different dimensions, in particular in the tangential direction of the
Statorblechpakets 4. Dabei weist der radial außen liegende Teil 12 eine größere Abmessung auf als der radial innen liegende Teil 11. Zweckmäßigerweise sind dabei die Abmessungen der beiden gleichen Teile 10 des Wickelstranges 7 in ihren Abmessungen gleich dem radial innen liegenden Teil 11 des Wickelstranges 8. Wird jeweils ein Wickelstrang 7 mit gleichen Teilen 10 und ein Wickelstrang 8 mit ungleichen Teilen 11 und 12 im Wechsel nebeneinander angeordnet, so ergibt sich eine nahezu vollständige Füllung der Nuten 6.Stator laminated core 4. The radially outer part 12 has a larger dimension than the radially inner part 11. The dimensions of the two identical parts 10 of the winding strand 7 are expediently equal in their dimensions to the radially inner part 11 of the winding strand 8. If a winding strand 7 with identical parts 10 and a winding strand 8 with dissimilar parts 11 and 12 are alternately arranged side by side, the grooves 6 are almost completely filled.
Die unterschiedlichen Abmessungen der beiden Teile 11 und 12 werden dadurch erreicht, daß bei gleichem Drahtquerschnitt für beide Teile der radial äußere Teil mit einer entsprechend größeren Zahl von Windungen hergestellt wird.The different dimensions of the two parts 11 and 12 are achieved in that, with the same wire cross section for both parts, the radially outer part is produced with a correspondingly larger number of turns.
Zwei radial übereinanderliegende Teile 10 des Wickelstranges 7 bzw. 11 und 12 des Wickelstranges 8 werden gegensinnig gewickelt, so daß die jeweils innenliegenden Wicklungsenden 13 bzw. 14 miteinander verbunden werden können (siehe Fig. 2A, 2B, 2C) . Die Verbindung der innenliegenden Wicklungsenden 13 und 14 der beiden Teile 10 bzw. 11 und 12 läßt sich zweckmäßigerweise dadurch herstellen, daß der Flachdraht zweimal unter etwa 45° um 90° gefalzt wird. Die Verbindung ist besonders gut, wenn die beiden Teile aus einem einzigen, fortlaufenden Stück Flachdraht hergestellt werden. Die Ausbildung der Verbindungsstelle mit den Falzen ist in Fig. 3 in zwei Ansichten dargestellt.Two parts 10 of the winding strand 7 or 11 and 12 of the winding strand 8 lying radially one above the other are wound in opposite directions, so that the respective inner winding ends 13 and 14 can be connected to one another (see FIGS. 2A, 2B, 2C). The connection of the inner winding ends 13 and 14 of the two parts 10 or 11 and 12 can expediently be established in that the flat wire is folded twice at approximately 45 ° by 90 °. The connection is particularly good if the two parts are made from a single, continuous piece of flat wire. The formation of the connection point with the folds is shown in Fig. 3 in two views.
Durch diese Art der Wicklung wird erreicht, daß die beiden Anschlußenden 15 und 16 jedes Wickelstranges nach der gleichen Seite des Statorblechpaketes 4 gerichtet und von außen gut zugänglich sind. Dadurch ist es bei einem dreiphasigen Motor sehr leicht, die zusammengehörigen Anschlußenden der zu einer Phase gehörenden Wickelstränge 7 bzw. 8 miteinander zu verbinden, wie dies schematisch in Fig. 4 dargestellt ist. In dieser Darstellung sind die jeweiligen Anschlußenden am Eingang mit U, V, W und am Ausgang mit X, Y, Z bezeichnet. Jeweils jeder dritte Wickelstrang gehört zu einer Phase und ist mit seinen zugehörigen Wickelsträngen verbunden. Dazu wird beispielsweise ein langes Anschlußende eines Wickelstranges mit einem kurzen Anschlußende seines drittnächstenThis type of winding ensures that the two connection ends 15 and 16 of each winding strand are directed towards the same side of the stator core 4 and are easily accessible from the outside. That's why it's with one three-phase motor very easy to connect the associated connection ends of the winding strands 7 and 8 belonging to one phase, as shown schematically in FIG. 4. In this illustration, the respective connection ends are designated U, V, W at the input and X, Y, Z at the output. Every third winding strand belongs to a phase and is connected to its associated winding strands. For this purpose, for example, a long connection end of a winding strand with a short connection end of its third next
Wickelstranges durch eine einzige Lötstelle verbunden. Die Anschlußenden X, Y, Z werden in einem Sternpunkt S verbunden. Die Verbindungen der Wickelstränge sind die einzigen Drähte, die sich im Wickelkopf überkreuzen.Winding strand connected by a single solder joint. The connection ends X, Y, Z are connected in a star point S. The connections of the winding strands are the only wires that cross over in the winding head.
In Fig. 5 sind in einer Draufsicht auf den Drehfeldmotor die Verbindungen der einzelnen Wickelstränge dargestellt. Jeweils vier Wickelstränge Ul, U2, U3, U4 sind miteinander und mit den Anschlußenden ü und X verbunden, entsprechend sind die Wickelstränge VI, V2, V3, V4 bzw. Wl, W2, W3, W4 miteinander und mit den Anschlußenden V und Y bzw. W und Z verbunden. Die Wickelstränge U4, V4, W4 sind im Sternpunkt S miteinander verbunden.5 shows the connections of the individual winding strands in a top view of the induction motor. Each four winding strands Ul, U2, U3, U4 are connected to each other and to the connection ends ü and X, correspondingly the winding strands VI, V2, V3, V4 or Wl, W2, W3, W4 are connected to each other and to the connection ends V and Y or W and Z connected. The winding strands U4, V4, W4 are connected to one another at the star point S.
Um die Verbindungen an einem Beispiel deutlicher darzustellen, sind alle Teile der Wicklung, die mit den Anschlußenden V und Y in Verbindung stehen, mit einer Rasterung versehen.In order to illustrate the connections more clearly using an example, all parts of the winding which are connected to the connection ends V and Y are provided with a grid.
Die Wickelstränge 7 und 8 werden zweckmäßigerweise außerhalb des Motors mit Hilfe eines Wickeldorns gefertigt. Die fertigen Wickelstränge werden dann radial von innen auf die Stege 5 aufgeschoben. BezugszeichenThe winding strands 7 and 8 are expediently manufactured outside the motor with the aid of a winding mandrel. The finished winding strands are then pushed onto the webs 5 radially from the inside. Reference numerals
1 Stator1 stator
2 Rotor 3 Pol2 rotor 3 pole
4 Statorblechpaket4 stator laminated core
5 Steg5 bridge
6 Nut6 groove
7 Wickelstrang 8 Wickelstrang7 winding strand 8 winding strand
99
10 Teil des Wickelstranges 710 part of the winding strand 7
11 Teil des Wickelstranges 811 part of the winding strand 8
12 Teil des Wickelstranges 8 13 Innenliegendes Wicklungsende12 Part of the winding strand 8 13 Inner winding end
14 Innenliegendes Wicklungsende14 Inside winding end
15 Anschlußende15 connection end
16 Anschlußende16 connection end
S SternpunktS star point
U Anschlußende Ul, U2, U3, U4 WickelstrangU connection end Ul, U2, U3, U4 winding strand
V Anschlußende VI, V2, V3, V4 Wickelstrang W Anschlußende Wl, W2, W3, W4 WickelstrangV connecting end VI, V2, V3, V4 winding strand W connecting end Wl, W2, W3, W4 winding strand
X AnschlußendeX connection end
Y Anschlußende Z Ansc lußende Y connection end Z connection end

Claims

A n s p r ü c h e Expectations
1. Drehfeldmotor, insbesondere für ein Einsatz in Kraftfahrzeugen, mit folgenden Merkmalen: ein Rotor (2) ist in einem btator ; ctrenbar gelagert; der Rotor (2) weist eine Anzahl von Polen (3) auf; der Stator (1) weist ein Statorblechpaket (4) mit einer Anzahl von Nuten (6) und Stegen (5) auf; in den Nuten (6) des Stators (1) ist eine1. Rotary field motor, in particular for use in motor vehicles, with the following features: a rotor (2) is in a btator; ctrenbar stored; the rotor (2) has a number of poles (3); the stator (1) has a laminated stator core (4) with a number of grooves (6) and webs (5); in the grooves (6) of the stator (1) is one
Schleifenwicklung mit mehreren Wickelsträngen (7, 8) angeordnet, dadurch g e k e n n z e i c h n e t , - daß das Verhältnis der Anzahl der Nuten (6) undLoop winding with several winding strands (7, 8) arranged, thereby g e k e n n z e i c h n e t, - that the ratio of the number of slots (6) and
Stege (5) des Stators (1) zur Anzahl der Pole (3) desRidges (5) of the stator (1) to the number of poles (3) of the
Rotors (2) 3:2 ist; daß jeder Wickelstrang (7, 8) der Schleifenwicklung in mehreren Windungen um einen Steg (5) in zwei ^m Steg benachbarten Nuten (6) desRotor (2) is 3: 2; that each winding strand (7, 8) of the loop winding in several turns around a web (5) in two ^ m web adjacent grooves (6) of
Statorblechpaketes (4) angeordnet ist, und daß die Wickelstränge (7, 8) aus Flachdraht bestehen.Stator laminated core (4) is arranged, and that the winding strands (7, 8) consist of flat wire.
2. Drehfeldmotor nach Anspruch 1, dadurch g e k e n n z e i c h n e t , daß jeder Wickelstrang (7, 8) aus wenigstens zwei Teilen (10, 11, 12) besteht, die radial übereinander auf dem Steg (5) angeordnet sind.2. Rotary field motor according to claim 1, characterized in that each winding strand (7, 8) consists of at least two parts (10, 11, 12) which are arranged radially one above the other on the web (5).
3. Drehfeldmotor nach Anspruch 3, dadurch g e k e n n z e i c h n e t , daß jeder Wickelstrang (7, 8) aus einer geraden Anzahl von Teilen (10, 11, 12) besteht.3. induction motor according to claim 3, characterized g e k e n n z e i c h n e t that each winding strand (7, 8) consists of an even number of parts (10, 11, 12).
4. Drehfeldmotor nach Anspruch 3, dadurch g e k e n n z e i c h n e t , daß jeder Wickelstrang (7, 8) aus zwei Teilen (10, 11, 12) besteht. 4. Rotary field motor according to claim 3, characterized in that each winding strand (7, 8) consists of two parts (10, 11, 12).
5. Drehfeldmotor nach Anspruch 2, dadurch g e k e n n z e i c h n e t , daß die Stege (5) einen rechteckigen Querschnitt senkrecht zur Achse des Stators (1) aufweisen, und daß benachbarte Stege (5) unterschiedliche Wickelstränge (7, 8) aufweisen.5. Rotary field motor according to claim 2, characterized in that the webs (5) have a rectangular cross section perpendicular to the axis of the stator (1) and that adjacent webs (5) have different winding strands (7, 8).
6. Drehfeldmotor nach Anspruch 5, dadurch g e k e n n z e i c h n e t , daß der eine (7) von zwei benachbarten Wickelsträngen (7, 8) aus zwei Teilen (10) mit gleichen Abmessungen in tangentialer Richtung des Statorblechpakets (4) besteht, und daß der andere (8) von zwei benachbarten Wickelsträngen (7, 8) aus zwei Teilen (11, 12) besteht, von denen der radial außen liegende Teil (12) eine größere Abmessung in tangentialer Richtung des Statorblechpakets (4) aufweist als der radial innen liegende Teil (11) .6. induction motor according to claim 5, characterized in that one (7) of two adjacent winding strands (7, 8) consists of two parts (10) with the same dimensions in the tangential direction of the stator core (4), and that the other (8 ) of two adjacent winding strands (7, 8) consists of two parts (11, 12), of which the radially outer part (12) has a larger dimension in the tangential direction of the stator core (4) than the radially inner part (11 ).
7. Drehfeldmotor nach Anspruch 6, dadurch g e k e n n z e i c h n e t , daß die unterschiedlichen Abmessungen der Teile (11, 12) bei gleichem Drahtquerschnitt durch unterschiedliche Windungszahl erreicht werden.7. Rotary field motor according to claim 6, characterized in that the different dimensions of the parts (11, 12) are achieved with the same wire cross-section by different number of turns.
8. Drehfeldmotor nach Anspruch 2, dadurch g e k e n n z e i c h n e t , daß radial übereinanderliegende Teile (10, 11, 12) der Wickelstränge (7, 8) gegensinnig gewickelt sind, so daß die jeweils innenliegenden Wicklungsenden (13, 14) direkt miteinander verbindbar sind.8. induction motor according to claim 2, characterized in that radially superimposed parts (10, 11, 12) of the winding strands (7, 8) are wound in opposite directions, so that the respective inner winding ends (13, 14) can be connected directly to one another.
9. Drehfeldmotor nach Anspruch 8, dadurch g e k e n n z e i c h n e t , daß als Verbindung der innenliegenden Wicklungsenden (13, 14) der Flachdraht zweifach gefalzt ist. 9. induction motor according to claim 8, characterized in that the connection of the inner winding ends (13, 14) of the flat wire is folded twice.
10. Drehfeldmotor nach einem der Ansprüche 1 oder 4, dadurch g e k e n n z e i c h n e t , daß sich die beiden Anschlußenden (15, 16) eines Wickelstranges (7, 8) an der gleichen Seite des Statorblechpakets (4) befinden und von außen leicht zugänglich sind.10. induction motor according to one of claims 1 or 4, characterized in that the two connection ends (15, 16) of a winding strand (7, 8) are on the same side of the stator core (4) and are easily accessible from the outside.
11. Drehfeldmotor nach Anspruch 10, dadurch g e k e n n z e i c h n e t , daß bei einem dreiphasigen Motor die zusammengehörigen Anschlußenden (15, 16) jedes dritten Wickelstrangs (7, 8) miteinander verbunden sind.11. Rotary field motor according to claim 10, characterized in that in a three-phase motor the associated connection ends (15, 16) of each third winding strand (7, 8) are connected to one another.
12. Drehfeldmotor nach Anspruch 11, dadurch g e k e n n z e i c h n e t , daß jeweils zwei Anschlußenden (15, 16) der zusammengehörigen Wickelstränge (Ul, U2, U3, U4; VI, V2, V3, V4; Wl, W2, W3, W4) durch eine einzige Lötstelle miteinander verbunden sind. 12. Rotary field motor according to claim 11, characterized in that two connection ends (15, 16) of the associated winding strands (Ul, U2, U3, U4; VI, V2, V3, V4; Wl, W2, W3, W4) by a single one Solder joint are connected.
PCT/EP1991/001480 1990-08-08 1991-08-06 Rotatory-field motor WO1992002982A1 (en)

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DEP4025137.3 1990-08-08

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WO1993007672A1 (en) * 1991-10-11 1993-04-15 Zf Friedrichshafen Ag Rotary field motor
EP0872943A1 (en) * 1997-04-16 1998-10-21 Japan Servo Co. Ltd. Permanent-magnet revolving electrodynamic machine with a concentrated stator winding
US7124977B2 (en) 2003-10-15 2006-10-24 Actown Electrocoil, Inc. Magnetic core winding apparatus
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US7683517B2 (en) 2004-03-31 2010-03-23 Kabushiki Kaisha Toyota Jidoshokki Rotary electric machine and method for mounting a coil on core for rotary electric machine
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US7124977B2 (en) 2003-10-15 2006-10-24 Actown Electrocoil, Inc. Magnetic core winding apparatus
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