WO2009121733A2 - Stator apparatus for a synchronous motor - Google Patents

Stator apparatus for a synchronous motor Download PDF

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Publication number
WO2009121733A2
WO2009121733A2 PCT/EP2009/053335 EP2009053335W WO2009121733A2 WO 2009121733 A2 WO2009121733 A2 WO 2009121733A2 EP 2009053335 W EP2009053335 W EP 2009053335W WO 2009121733 A2 WO2009121733 A2 WO 2009121733A2
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WO
WIPO (PCT)
Prior art keywords
coils
stator
coil
groups
stator teeth
Prior art date
Application number
PCT/EP2009/053335
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German (de)
French (fr)
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WO2009121733A3 (en
Inventor
Torsten Wilharm
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.)
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Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to EP09728546A priority Critical patent/EP2260564A2/en
Publication of WO2009121733A2 publication Critical patent/WO2009121733A2/en
Publication of WO2009121733A3 publication Critical patent/WO2009121733A3/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
    • H02K3/28—Layout of windings or of connections between windings

Definitions

  • the invention relates to a stator for a synchronous machine and more particularly to a scheme for arranging coils on a stator
  • Synchronous machines have a fixed stator and a rotatable rotor provided with permanent magnets or the like.
  • the stator is provided with a coil winding having a plurality of coils for generating a rotating magnetic field upon application of a suitable rotating current, which drives the rotor.
  • the stator usually has stator teeth and grooves through which the coils of the stator are guided, so that a coil surrounds at least one stator tooth.
  • the individual coils are arranged overlapping each other on the stator. As a result, in a groove, two or more than two coil sides lie one above the other in the radial direction.
  • a plurality of coils are connected to one another, so that they can be jointly controlled by a phase control, ie a phase current.
  • phase control ie a phase current.
  • These coils are often combined in one or more groups into several coils.
  • the Coils of a group on the stator partially adjacent to each other, so that the coil sides of two adjacent coils extend through the same groove.
  • each coil encloses two stator teeth each with an intermediate groove.
  • Coils of one phase have two groups of three coils each on the stator. In each group of coils, three coils are arranged adjacent to each other, so that two immediately adjacent coils have a coil side in each case the same groove.
  • the groups of coils of the further phases have the same geometric arrangement, but are offset on the stator by one groove with respect to the other coil groups.
  • the coils assigned to a phase can be connected in series and / or in parallel.
  • the mutually adjacent coils of a group whose coil sides extend through the same groove have in the groove an opposite winding sense, so that in operation the current flows are rectified by the lying in a groove coil sides to each other. It is an object of the present invention to provide an electrical machine in which the coils are arranged so that short circuits between the coils associated with a phase are excluded.
  • a stator assembly for a multi-phase synchronous machine comprises an annular stator with radially inwardly directed stator teeth and grooves arranged therebetween and, in each case with a phase, associated coil arrangements with a plurality of coils each.
  • the plurality of coils of a coil assembly are divided into four groups, of which at least two opposing groups comprise a plurality of coils. The groups are arranged offset by 90 ° to each other on the stator.
  • the coils of the at least two mutually opposite groups having a plurality of coils are arranged on the stator teeth such that none of the coil sides of the plurality of coils are arranged in the same slot.
  • One idea of the invention relates to a stator arrangement with a special winding scheme, in which the coils assigned to one phase are distributedly arranged on the stator, so that not two of their coil sides come to rest together in a groove of the stator. This is achieved by arranging the coils in a plurality of groups offset on the stator and arranged in a group with a plurality of coils distributed to the stator teeth such that each coil side of the plurality of coils of the coil arrangement is arranged individually in one of the slots. Two individual coils are also disposed opposite to each other on the stator so that their center axis is substantially perpendicular to the center axis of the opposing two-arrays of coils.
  • the opposing groups having a plurality of coils may have a point-symmetrical arrangement.
  • the winding sense of each of the coils on the stator may be equal with respect to a radial direction.
  • the number of stator teeth may be 18 or a multiple thereof.
  • the arrays of coils associated with the phases may each be angularly offset from one another by an angle equal to 360 ° divided by the number of phases.
  • first and second of the coils may each include a plurality of stator teeth, with one coil side of the first coil in a groove located between two of the plurality of stator teeth enclosed by the second coil.
  • a first of the coils may enclose a first number of stator teeth and a second of the coils may respectively enclose a second number of stator teeth, wherein both coil ends th of the first coil lie in grooves which lie between the stator coil enclosed by the second coil
  • an electric machine with the above stator arrangement and a rotor rotatably mounted inside the stator arrangement is provided.
  • Figure 1 is a winding diagram for a first electric machine with 18 stator slots
  • Figure 2 is a winding diagram for a second electric machine with 18 stator slots.
  • the stator 1 shows a schematic cross-sectional view of a first electric machine 1 with a stator 2 and a rotor 3 is shown.
  • the stator 2 is circular in shape and surrounds a region in which the rotor 3 is rotatably arranged on a shaft (not shown).
  • the stator 2 comprises stator teeth 4, between which grooves 5 are formed.
  • the stator comprises 18 slots, numbered 1 through 18.
  • the stator teeth 4 are directed on the stator 2 radially to the center of the circular stator 2. At their inboard ends, the stator teeth 4 are formed widened, so that a T-shaped structure of the stator teeth 4 is formed.
  • the rotor 3 is provided with permanent magnets 8 and has radially outwardly directed magnetic poles 6, wherein adjacent magnetic fields pole have different polarities.
  • the rotor 3 has eight magnetic poles 6.
  • Coils 7 are arranged on the stator 2, so that they each enclose two stator teeth 4 and an intermediate groove 5. The portions of the coils 7 that lie in the respective groove 5 are called coil sides.
  • each phase being assigned six coils.
  • the six coils 7 of a phase can be interconnected in various ways, in particular in a combination of series and parallel connection. For the sake of clarity, only the six coils 7 associated with one phase are shown in FIG.
  • the coils 7 are shown by outwardly drawn sheets. The winding sense of each coil 7 is indicated by an arrow.
  • the six coils 7 of the considered phase are arranged distributed on the stator 2.
  • Two pairs of coils 7 are provided opposite to each other on the stator 2.
  • Each of the groups of two has two coils 7, each enclosing two stator teeth 4 and which are offset by a groove 5 and a stator tooth 4 to each other, so that the two coils 7 occupy four adjacent grooves 5.
  • Two identical coils associated with the same phase 7 are also arranged opposite each other on the stator 2 by 90 ° to the opposite groups of two.
  • a first radial center axis M1 extends as an axis of symmetry through the two individual coils 7 perpendicular to a second radial center axis M2 as the axis of symmetry of the two groups of two coils 7.
  • the coils 7 can be arranged distributed to the stator 2, without in one of the grooves 5 two coil sides of coils 7 of a phase are arranged.
  • FIG. 2 shows a second electric machine 11, which shows a further possible arrangement of the coils 7 on the stator 2.
  • the embodiment of Figure 2 differs from Figure 1 in that the two-arrays of coils 7 are formed so that a first of the coils 71 surrounds only a stator tooth 4 and a second of the coils 72 three stator teeth 4 encloses, wherein the middle the enclosed stator teeth 4 carries the first coil 71.
  • the first and second coils of the group of two are arranged symmetrically with respect to the second center axis M2 passing through the center of the stator 2.
  • first coil 71 surrounds more than one stator tooth 4 and the second coil 72 encloses a number of stator teeth 5, the second coil 72 enclosing the first coil 71, so that the grooves 5 through which the first coil 71 runs, lie between the outer stator teeth of the block of stator teeth, which surrounds the second coil 72.
  • the winding scheme is applicable to stators 2 having a number of stator teeth 4, the number of which is a multiple of 18.
  • One idea is to divide the number of phases of associated coils 7 into four groups of coils 7. In each case two mutually opposite of the groups have the same number and with respect to the stator teeth same arrangement of the coils 7.
  • the four groups are offset from each other on the stator 2 at an angle of 90 ° with respect to their respective center axis M1, M2. If one of the groups has more than one coil 7, the coil sides of the coils 7 are arranged in a number of slots 5, which corresponds to twice the number of coils 7, so that the coil sides of each of the coils 7 are arranged in a groove 5, in which no further coil side of a same phase associated coil 7 is arranged.
  • the winding scheme is 3 - 5, 7 - 10, 8 - 9, 12 - 14, 16 - 18 and 17 - 1.
  • the coil groups of the further phases are formed according to the arrangement shown above, but offset from the illustrated groups of coils associated with the first phase.
  • the coils 7 of the groups are offset from each other with respect to their center axes M1, M2 by an angle corresponding to 360 ° by the number of phases.
  • the coil groups can, for example, be connected in such a way that the two coil groups 7 offset by 90 ° from each other are connected in series, while the coils 7, which are opposite them and are also connected in series, are connected in parallel. Other interconnections of the coils 7 a phase are possible.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

The invention relates to a stator apparatus for a multiphase synchronous machine, comprising a circular stator with stator teeth (4) directed radially inward and notches (5) located therebetween, and coil arrangements associated with each respective phase, each of said coil arrangements comprising a plurality of coils (7). The plurality of coils (7) of one of the coil arrangements are subdivided into four groups, of which groups at least two located opposite one another comprise a plurality of coils (7); wherein the groups are disposed at the stator (2) offset by 90° relative to the other respective groups, wherein the coils of the at least two groups comprising a plurality of coils (7) and located opposite one another are disposed at the stator teeth (4) such that no sides of the coils of the plurality of coils (7) are located in the same notch (5).

Description

Beschreibung description
Titeltitle
Statoranordnung für einen SynchronmotorStator arrangement for a synchronous motor
Technisches GebietTechnical area
Die Erfindung betrifft einen Stator für eine Synchronmaschine und insbesondere ein Schema zur Anordnung von Spulen an einem StatorThe invention relates to a stator for a synchronous machine and more particularly to a scheme for arranging coils on a stator
Stand der TechnikState of the art
Synchronmaschinen weisen einen feststehenden Stator und einen drehbaren, mit Permanentmagneten oder dergleichen versehenen Rotor auf. Der Stator ist mit einer Spulenwicklung mit mehreren Spulen versehen, um bei Anlegen eines geeigneten Drehstroms ein magnetisches Drehfeld zu erzeugen, das den Rotor antreibt. Der Stator weist in der Regel Statorzähne und Nuten auf, durch die die Spulen des Ständers geführt werden, so dass eine Spule mindestens einen Statorzahn umgibt. Um gute Laufeigenschaften einer solchen elektrischen Maschine zu erreichen, werden die einzelnen Spulen an dem Stator einander überlappend angeordnet. Dadurch liegen in einer Nut zwei oder mehr als zwei Spulenseiten in radialer Richtung übereinander.Synchronous machines have a fixed stator and a rotatable rotor provided with permanent magnets or the like. The stator is provided with a coil winding having a plurality of coils for generating a rotating magnetic field upon application of a suitable rotating current, which drives the rotor. The stator usually has stator teeth and grooves through which the coils of the stator are guided, so that a coil surrounds at least one stator tooth. In order to achieve good running properties of such an electric machine, the individual coils are arranged overlapping each other on the stator. As a result, in a groove, two or more than two coil sides lie one above the other in the radial direction.
Üblicherweise werden bei einer elektrischen Maschine mehrere Spulen miteinan- der verschaltet, so dass sie gemeinsam durch eine Phasenansteuerung, d.h. einen Phasenstrom, angesteuert werden können. Diese Spulen sind häufig in einer oder mehreren Gruppen zu mehreren Spulen zusammengefasst. Dabei sind die Spulen einer Gruppe an dem Stator teilweise einander benachbart angeordnet, so dass die Spulenseiten von zwei einander benachbarten Spulen durch dieselbe Nut verlaufen.Usually, in an electric machine, a plurality of coils are connected to one another, so that they can be jointly controlled by a phase control, ie a phase current. These coils are often combined in one or more groups into several coils. Here are the Coils of a group on the stator partially adjacent to each other, so that the coil sides of two adjacent coils extend through the same groove.
Dies kann jedoch bei Wicklungsfehlern zu Kurzschlüssen zwischen den derselben Phase zugeordneten Spulen führen. Dies bewirkt hohe Wirbelströme im Fehlerfall, wodurch insbesondere bei Kurzschlüssen zwischen derselben Phase zugeordneten Spulen besonders große Bremsmomente entstehen können. Um die Gefahr derartiger Kurzschlüsse zu vermeiden, wird zwischen den Spulenseiten in einer Nut des Stators eine Zusatzisolation vorgesehen. Dies bedeutet jedoch einen zusätzlichen Verarbeitungsschritt, der aufwendig ist und die Herstellungskosten erhöht.However, this can lead to short circuits between coils assigned to the same phase in case of winding errors. This causes high eddy currents in the event of a fault, which can result in particular in short circuits between the same phase associated coils particularly large braking torques. To avoid the risk of such short circuits, an additional insulation is provided between the coil sides in a groove of the stator. However, this means an additional processing step, which is expensive and increases the manufacturing cost.
Bei einer dreiphasigen Synchronmaschine mit 18 Statorzähnen, die die Statorpole darstellen, und 8 Rotorpolen umschließt jede Spule zwei Statorzähne jeweils mit einer dazwischenliegenden Nut. Spulen einer Phase weisen zwei an dem Stator einander gegenüberliegende Gruppen von jeweils 3 Spulen auf. In jeder Gruppe von Spulen sind drei Spulen einander benachbart angeordnet, so dass zwei unmittelbar einander benachbarte Spulen eine Spulenseite in jeweils derselben Nut aufweisen. Die Gruppen von Spulen der weiteren Phasen weisen dieselbe geometrische Anordnung auf, sind jedoch an dem Stator um jeweils eine Nut gegenüber den anderen Spulengruppen versetzt.In a three-phase synchronous machine with 18 stator teeth representing the stator poles and 8 rotor poles, each coil encloses two stator teeth each with an intermediate groove. Coils of one phase have two groups of three coils each on the stator. In each group of coils, three coils are arranged adjacent to each other, so that two immediately adjacent coils have a coil side in each case the same groove. The groups of coils of the further phases have the same geometric arrangement, but are offset on the stator by one groove with respect to the other coil groups.
Die einer Phase zugeordneten Spulen können seriell und/oder parallel verschaltet sein. Die einander benachbarten Spulen einer Gruppe, deren Spulenseiten durch die gleiche Nut verlaufen, weisen in der Nut einen einander entgegengesetzten Wicklungssinn auf, so dass im Betrieb die Stromflüsse durch die in einer Nut liegenden Spulenseiten zueinander gleichgerichtet sind. Es ist Aufgabe der vorliegenden Erfindung, eine elektrische Maschine bereitzustellen, bei der die Spulen so angeordnet sind, dass Kurzschlüsse zwischen den einer Phase zugeordneten Spulen ausgeschlossen sind.The coils assigned to a phase can be connected in series and / or in parallel. The mutually adjacent coils of a group whose coil sides extend through the same groove, have in the groove an opposite winding sense, so that in operation the current flows are rectified by the lying in a groove coil sides to each other. It is an object of the present invention to provide an electrical machine in which the coils are arranged so that short circuits between the coils associated with a phase are excluded.
Offenbarung der ErfindungDisclosure of the invention
Diese Aufgabe wird durch die elektrische Maschine gemäß Anspruch 1 gelöst.This object is achieved by the electrical machine according to claim 1.
Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den abhängigen An- Sprüchen angegeben.Further advantageous embodiments of the invention are specified in the dependent claims.
Gemäß einem ersten Aspekt ist eine Statoranordnung für eine mehrphasige Synchronmaschine vorgesehen. Die Statoranordnung umfasst einen ringförmigen Stator mit radial nach innen gerichteten Statorzähnen und dazwischen angeord- neten Nuten sowie jeweils einer Phase zugeordnete Spulenanordnungen mit jeweils mehreren Spulen. Die mehreren Spulen einer Spulenanordnung sind in vier Gruppen aufgeteilt, von denen mindestens zwei einander gegenüberliegende Gruppen mehrere Spulen umfassen. Die Gruppen sind um jeweils 90° zueinander versetzt an dem Stator angeordnet. Die Spulen der mindestens zwei einander gegenüberliegenden Gruppen mit mehreren Spulen sind so an den Statorzähnen angeordnet, dass keine der Spulenseiten der mehreren Spulen in derselben Nut angeordnet sind.According to a first aspect, a stator assembly for a multi-phase synchronous machine is provided. The stator arrangement comprises an annular stator with radially inwardly directed stator teeth and grooves arranged therebetween and, in each case with a phase, associated coil arrangements with a plurality of coils each. The plurality of coils of a coil assembly are divided into four groups, of which at least two opposing groups comprise a plurality of coils. The groups are arranged offset by 90 ° to each other on the stator. The coils of the at least two mutually opposite groups having a plurality of coils are arranged on the stator teeth such that none of the coil sides of the plurality of coils are arranged in the same slot.
Eine Idee der Erfindung betrifft eine Statoranordnung mit einem speziellen Wick- lungsschema, bei dem die einer Phase zugeordneten Spulen verteilt an dem Stator angeordnet sind, so dass nicht zwei von deren Spulenseiten gemeinsam in einer Nut des Stators zu liegen kommen. Dies wird erreicht, in dem die Spulen in mehreren Gruppen versetzt an dem Stator angeordnet werden und in einer Gruppe mit mehreren Spulen diese so an den Statorzähnen verteilt angeordnet werden, dass jede Spulenseite der mehreren Spulen der Spulenanordnung einzeln in einer der Nuten angeordnet ist. Zwei einzelne Spulen sind ebenfalls einander gegenüberliegend an dem Stator angeordnet, so dass deren Mittenachse im Wesentlichen senkrecht zur Mittenachse der einander gegenüberliegenden Zweieranordnungen von Spulen verläuft. Dadurch, dass bei der Zweieranordnung der Spulen diese so zueinander angeordnet sind, dass die entsprechenden Spulenseiten durch verschiedene Nuten verlaufen, kann kein Kurzschluss zwischen den Windungen der Spulen, die einer Phase zugeordnet sind, auftreten, da die entsprechenden Spulenseiten durch verschiedene Nuten des Stators verlaufen.One idea of the invention relates to a stator arrangement with a special winding scheme, in which the coils assigned to one phase are distributedly arranged on the stator, so that not two of their coil sides come to rest together in a groove of the stator. This is achieved by arranging the coils in a plurality of groups offset on the stator and arranged in a group with a plurality of coils distributed to the stator teeth such that each coil side of the plurality of coils of the coil arrangement is arranged individually in one of the slots. Two individual coils are also disposed opposite to each other on the stator so that their center axis is substantially perpendicular to the center axis of the opposing two-arrays of coils. Characterized in that the two-way arrangement of the coils are arranged to each other so that the corresponding coil sides extend through different grooves, no short circuit between the turns of the coils, which are associated with a phase, occur because the corresponding coil sides extend through different grooves of the stator ,
Weiterhin können die einander gegenüberliegenden Gruppen mit mehreren Spulen eine punktsymmetrische Anordnung aufweisen.Furthermore, the opposing groups having a plurality of coils may have a point-symmetrical arrangement.
Bei einer Ausführungsform kann der Wicklungssinn jeder der Spulen an dem Sta- tor bezüglich einer radialen Richtung gleich sein.In one embodiment, the winding sense of each of the coils on the stator may be equal with respect to a radial direction.
Beispielsweise kann die Anzahl der Statorzähne 18 oder ein Vielfaches davon betragen.For example, the number of stator teeth may be 18 or a multiple thereof.
Gemäß einer Ausführungsform können die den Phasen zugeordneten Anordnungen von Spulen jeweils um einen Winkel zueinander versetzt sein, der 360° geteilt durch die Anzahl der Phasen entspricht.In one embodiment, the arrays of coils associated with the phases may each be angularly offset from one another by an angle equal to 360 ° divided by the number of phases.
Weiterhin kann bei einer der Gruppen mit mehreren Spulen eine erste und eine zweite der Spulen jeweils mehrere Statorzähne umschließen, wobei eine Spulenseite der ersten Spule in einer Nut liegt, die zwischen zwei der mehreren von der zweiten Spule umschlossenen Statorzähnen liegt.Furthermore, in one of the multi-coil groups, first and second of the coils may each include a plurality of stator teeth, with one coil side of the first coil in a groove located between two of the plurality of stator teeth enclosed by the second coil.
Alternativ oder zusätzlich kann bei einer der Gruppen mit mehreren Spulen eine erste der Spulen eine erste Anzahl von Statorzähnen und eine zweite der Spulen jeweils eine zweite Anzahl der Statorzähne umschließen, wobei beide Spulensei- ten der ersten Spule in Nuten liegen, die zwischen den von der zweiten Spule umschlossenen Statorzähnen liegenAlternatively or additionally, in one of the groups with a plurality of coils, a first of the coils may enclose a first number of stator teeth and a second of the coils may respectively enclose a second number of stator teeth, wherein both coil ends th of the first coil lie in grooves which lie between the stator coil enclosed by the second coil
Gemäß einem weiteren Aspekt ist eine elektrische Maschine mit der obigen Statoranordnung und einem im Inneren der Statoranordnung drehbar gelagerten Rotor vorgesehen.According to a further aspect, an electric machine with the above stator arrangement and a rotor rotatably mounted inside the stator arrangement is provided.
Kurzbeschreibung der ZeichnungenBrief description of the drawings
Bevorzugte Ausführungsformen der Erfindung werden nachfolgend anhand der beigefügten Zeichnungen näher erläutert. Es zeigen:Preferred embodiments of the invention are explained below with reference to the accompanying drawings. Show it:
Figur 1 ein Wicklungsschema für eine erste elektrische Maschine mit 18 Statornuten; und Figur 2 ein Wicklungsschema für eine zweite elektrische Maschine mit 18 Statornuten.Figure 1 is a winding diagram for a first electric machine with 18 stator slots; and Figure 2 is a winding diagram for a second electric machine with 18 stator slots.
Beschreibung von AusführungsformenDescription of embodiments
In Figur 1 ist eine schematische Querschnittsdarstellung einer ersten elektrischen Maschine 1 mit einem Stator 2 und einem Rotor 3 dargestellt. Der Stator 2 ist kreisförmig ausgebildet und umschließt einen Bereich, in dem der Rotor 3 drehbar an einer (nicht gezeigten) Welle angeordnet ist. Der Stator 2 umfasst Statorzähne 4, zwischen denen Nuten 5 ausgebildet sind. Im vorliegenden Beispiel umfasst der Stator 18 Nuten, die mit 1 bis 18 durchnummeriert sind. Die Statorzähne 4 sind am Stator 2 radial zum Mittelpunkt des kreisförmigen Stators 2 gerichtet. An ihren nach innen stehenden Enden sind die Statorzähne 4 verbreitert ausgebildet, so dass eine T-förmige Struktur der Statorzähne 4 gebildet ist.1 shows a schematic cross-sectional view of a first electric machine 1 with a stator 2 and a rotor 3 is shown. The stator 2 is circular in shape and surrounds a region in which the rotor 3 is rotatably arranged on a shaft (not shown). The stator 2 comprises stator teeth 4, between which grooves 5 are formed. In the present example, the stator comprises 18 slots, numbered 1 through 18. The stator teeth 4 are directed on the stator 2 radially to the center of the circular stator 2. At their inboard ends, the stator teeth 4 are formed widened, so that a T-shaped structure of the stator teeth 4 is formed.
Der Rotor 3 ist mit Permanentmagneten 8 versehen und weist in radialer Richtung nach außen gerichtete Magnetpole 6 auf, wobei einander benachbarte Magnet- pole verschiedene Polaritäten aufweisen. Im dargestellten Beispiel weist der Rotor 3 acht Magnetpole 6 auf. Spulen 7 sind an dem Stator 2 angeordnet, so dass sie jeweils zwei Statorzähne 4 und eine dazwischenliegende Nut 5 umschließen. Die Abschnitte der Spulen 7, die in der jeweiligen Nut 5 liegen, werden Spulenseiten genannt.The rotor 3 is provided with permanent magnets 8 and has radially outwardly directed magnetic poles 6, wherein adjacent magnetic fields pole have different polarities. In the example shown, the rotor 3 has eight magnetic poles 6. Coils 7 are arranged on the stator 2, so that they each enclose two stator teeth 4 and an intermediate groove 5. The portions of the coils 7 that lie in the respective groove 5 are called coil sides.
In dem gezeigten Ausführungsbeispiel werden 18 Spulen 7 vorgesehen, wobei jeder Phase sechs Spulen zugeordnet sind. Die sechs Spulen 7 einer Phase können auf verschiedene Weise miteinander verschaltet sein, insbesondere in einer Kombination von Serien- und Parallelschaltung. Der Anschaulichkeit halber sind in Figur 1 nur die einer Phase zugeordneten sechs Spulen 7 dargestellt. Die Spulen 7 sind durch nach außen gezogene Bögen dargestellt. Der Wicklungssinn jeder Spule 7 ist durch einen Pfeil angegeben.In the embodiment shown, 18 coils 7 are provided, each phase being assigned six coils. The six coils 7 of a phase can be interconnected in various ways, in particular in a combination of series and parallel connection. For the sake of clarity, only the six coils 7 associated with one phase are shown in FIG. The coils 7 are shown by outwardly drawn sheets. The winding sense of each coil 7 is indicated by an arrow.
Die sechs Spulen 7 der betrachteten Phase sind verteilt an dem Stator 2 angeordnet. Zwei Zweiergruppen von Spulen 7 sind einander gegenüberliegend an dem Stator 2 vorgesehen. Jede der Zweiergruppen weist zwei Spulen 7 auf, die jeweils zwei Statorzähne 4 umschließen und die um eine Nut 5 bzw. um einen Statorzahn 4 zueinander versetzt sind, so dass die beiden Spulen 7 vier einander benachbarte Nuten 5 belegen. Zwei derselben Phase zugeordnete, einzelne Spulen 7 sind ebenfalls einander gegenüberliegend an dem Stator 2 um 90° zu den einander gegenüberliegenden Zweiergruppen angeordnet. Mit anderen Worten verläuft eine erste radiale Mittenachse M1 als Symmetrieachse durch die beiden einzelnen Spulen 7 senkrecht zu einer zweiten radialen Mittenachse M2 als Symmetrieachse der beiden Zweiergruppen von Spulen 7. Auf diese Weise können die Spulen 7 an dem Stator 2 verteilt angeordnet werden, ohne dass in einer der Nuten 5 zwei Spulenseiten von Spulen 7 einer Phase angeordnet sind.The six coils 7 of the considered phase are arranged distributed on the stator 2. Two pairs of coils 7 are provided opposite to each other on the stator 2. Each of the groups of two has two coils 7, each enclosing two stator teeth 4 and which are offset by a groove 5 and a stator tooth 4 to each other, so that the two coils 7 occupy four adjacent grooves 5. Two identical coils associated with the same phase 7 are also arranged opposite each other on the stator 2 by 90 ° to the opposite groups of two. In other words, a first radial center axis M1 extends as an axis of symmetry through the two individual coils 7 perpendicular to a second radial center axis M2 as the axis of symmetry of the two groups of two coils 7. In this way, the coils 7 can be arranged distributed to the stator 2, without in one of the grooves 5 two coil sides of coils 7 of a phase are arranged.
Im Ausführungsbeispiel der Figur 1 sind die Spulen 7, die einer gemeinsamen Phase zugeordnet sind, gemäß einem Schema 3 - 5, 7 - 9, 8 - 10, 12 - 14, 16 - 18,In the embodiment of Figure 1, the coils 7, which are assigned to a common phase, according to a Scheme 3 - 5, 7 - 9, 8 - 10, 12 - 14, 16 - 18,
17 - 1 angeordnet, wobei die Ziffern der in der Zeichnung angegebenen Nummerierung der Nuten 5 entsprechen. Der Wicklungssinn der Spulen 7 in den Nuten 5 ist bezüglich der jeweiligen radialen Richtung des Stators 2 gleichgerichtet.17 - 1 arranged, with the numbers indicated in the drawing Numbering of the grooves 5 correspond. The winding sense of the coils 7 in the grooves 5 is rectified with respect to the respective radial direction of the stator 2.
In Figur 2 ist eine zweite elektrische Maschine 11 dargestellt, die eine weitere mögliche Anordnung der Spulen 7 an dem Stator 2 zeigt. Im Wesentlichen unterscheidet sich das Ausführungsbeispiel der Figur 2 von der Figur 1 dadurch, dass die Zweieranordnungen von Spulen 7 so ausgebildet sind, dass eine erste der Spulen 71 nur einen Statorzahn 4 umschließt und eine zweite der Spulen 72 drei Statorzähne 4 umschließt, wobei der mittlere der umschlossenen Statorzähne 4 die erste Spule 71 trägt. Mit anderen Worten, die erste und zweite Spule der Zweiergruppe sind symmetrisch zur zweiten durch den Mittelpunkt des Stators 2 verlaufenden Mittenachse M2 angeordnet. Alternative Anordnungen können vorsehen, dass die erste Spule 71 mehr als einen Statorzahn 4 und die zweite Spule 72 eine Anzahl von Statorzähnen 5 umschließt, wobei die zweite Spule 72 die erste Spule 71 umschließt, so dass die Nuten 5, durch die die erste Spule 71 verläuft, zwischen den äußeren Statorzähnen des Blockes von Statorzähnen liegen, die die zweite Spule 72 umschließt.FIG. 2 shows a second electric machine 11, which shows a further possible arrangement of the coils 7 on the stator 2. In essence, the embodiment of Figure 2 differs from Figure 1 in that the two-arrays of coils 7 are formed so that a first of the coils 71 surrounds only a stator tooth 4 and a second of the coils 72 three stator teeth 4 encloses, wherein the middle the enclosed stator teeth 4 carries the first coil 71. In other words, the first and second coils of the group of two are arranged symmetrically with respect to the second center axis M2 passing through the center of the stator 2. Alternative arrangements may provide that the first coil 71 surrounds more than one stator tooth 4 and the second coil 72 encloses a number of stator teeth 5, the second coil 72 enclosing the first coil 71, so that the grooves 5 through which the first coil 71 runs, lie between the outer stator teeth of the block of stator teeth, which surrounds the second coil 72.
Im Wesentlichen ist das Wicklungsschema auf Statoren 2 mit einer Anzahl von Statorzähnen 4 übertragbar, deren Anzahl ein Vielfaches von 18 beträgt.In essence, the winding scheme is applicable to stators 2 having a number of stator teeth 4, the number of which is a multiple of 18.
Eine Idee besteht darin, die Anzahl einer Phase zugehöriger Spulen 7 in vier Gruppen von Spulen 7 zu unterteilen. Jeweils zwei einander gegenüberliegende der Gruppen weisen die gleiche Anzahl und bezüglich der Statorzähne gleiche Anordnung der Spulen 7 auf. Die vier Gruppen sind an dem Stator 2 in einem Winkel von 90 ° bezüglich ihrer jeweiligen Mittenachse M1 , M2 zueinander versetzt. Weist eine der Gruppen mehr als eine Spule 7 auf, so sind die Spulenseiten der Spulen 7 in einer Anzahl von Nuten 5 angeordnet, die dem doppel- ten der Anzahl der Spulen 7 entspricht, so dass die Spulenseiten jeder der Spulen 7 in einer Nut 5 angeordnet sind, in der keine weitere Spulenseite einer derselben Phase zugeordneten Spule 7 angeordnet ist.One idea is to divide the number of phases of associated coils 7 into four groups of coils 7. In each case two mutually opposite of the groups have the same number and with respect to the stator teeth same arrangement of the coils 7. The four groups are offset from each other on the stator 2 at an angle of 90 ° with respect to their respective center axis M1, M2. If one of the groups has more than one coil 7, the coil sides of the coils 7 are arranged in a number of slots 5, which corresponds to twice the number of coils 7, so that the coil sides of each of the coils 7 are arranged in a groove 5, in which no further coil side of a same phase associated coil 7 is arranged.
Bei dem Ausführungsbeispiel der Figur 2 ist das Wicklungsschema 3 - 5, 7 - 10, 8 - 9, 12 - 14, 16 - 18 und 17 - 1.In the embodiment of FIG. 2, the winding scheme is 3 - 5, 7 - 10, 8 - 9, 12 - 14, 16 - 18 and 17 - 1.
In beiden Ausführungsformen werden die Spulengruppen der weiteren Phasen entsprechend der oben gezeigten Anordnung ausgebildet, jedoch zu den dargestellten der ersten Phase zugeordneten Spulengruppen versetzt. Allgemein sind die Spulen 7 der Gruppen bezüglich ihrer Mittenachsen M1 , M2 um einen Winkel zueinander versetzt, der 360 ° durch die Anzahl der Phasen entspricht.In both embodiments, the coil groups of the further phases are formed according to the arrangement shown above, but offset from the illustrated groups of coils associated with the first phase. Generally, the coils 7 of the groups are offset from each other with respect to their center axes M1, M2 by an angle corresponding to 360 ° by the number of phases.
Die Spulengruppen können bspw. so verschaltet sein, dass die jeweils zwei zueinander um 90 ° versetzten Spulengruppen Spulen 7 in Reihe geschaltet sind, wäh- rend die diesen gegenüberliegenden, ebenfalls in Reihe verschalteten Spulen 7 parallel geschaltet sind. Auch andere Verschaltungen der Spulen 7 einer Phase sind möglich. The coil groups can, for example, be connected in such a way that the two coil groups 7 offset by 90 ° from each other are connected in series, while the coils 7, which are opposite them and are also connected in series, are connected in parallel. Other interconnections of the coils 7 a phase are possible.

Claims

Patentansprüche claims
1. Statoranordnung für eine mehrphasige Synchronmaschine umfassend: - einen ringförmigen Stator (2) mit radial nach innen gerichtetenA stator assembly for a multiphase synchronous machine comprising: - an annular stator (2) with radially inwardly directed
Statorzähnen (4) und dazwischen angeordneten Nuten (5); - jeweils einer Phase zugeordnete Spulenanordnungen mit jeweils mehrerenStator teeth (4) and grooves (5) disposed therebetween; - Each associated with a phase coil arrangements, each with several
Spulen (7), wobei die mehreren Spulen (7) einer der Spulenanordnungen in vier Gruppen aufgeteilt sind, von denen mindestens zwei einander gegenüberliegendeCoils (7), wherein the plurality of coils (7) of one of the coil assemblies are divided into four groups, at least two of which are opposite one another
Gruppen mehrere Spulen (7) umfassen; wobei die Gruppen um jeweils 90° zueinander versetzt an dem Stator (2) angeordnet sind; wobei die Spulen der mindestens zwei einander gegenüberliegende Gruppen mit mehreren Spulen (2) so an den Statorzähnen (4) angeordnet sind, dass keine der Spulenseiten der mehreren Spulen (7) in derselben Nut (5) angeordnet sind.Groups comprise a plurality of coils (7); wherein the groups are arranged offset by 90 ° to each other on the stator (2); wherein the coils of the at least two opposing groups having a plurality of coils (2) are arranged on the stator teeth (4) such that none of the coil sides of the plurality of coils (7) are arranged in the same groove (5).
2. Statoranordnung nach Anspruch 1 , wobei die einander gegenüberliegenden Gruppen mit mehreren Spulen (7) eine punktsymmetrische Anordnung aufweisen.2. Stator arrangement according to claim 1, wherein the opposing groups having a plurality of coils (7) have a point-symmetrical arrangement.
3. Statoranordnung nach Anspruch 1 oder 2, wobei der Wicklungssinn jeder der Spulen (7) an dem Stator (2) bezüglich einer radialen Richtung gleich ist.3. A stator assembly according to claim 1 or 2, wherein the winding sense of each of the coils (7) on the stator (2) is equal to a radial direction.
4. Statoranordnung nach einem der Ansprüche 1 bis 3, wobei die Anzahl der Statorzähne (4) 18 oder ein Vielfaches davon beträgt.4. A stator assembly according to any one of claims 1 to 3, wherein the number of stator teeth (4) is 18 or a multiple thereof.
5. Statoranordnung nach einem der Ansprüche 1 bis 4, wobei die den Phasen zugeordneten Anordnungen von Spulen (7) jeweils um einen Winkel zueinander versetzt sind, der 360° geteilt durch die Anzahl der Phasen entspricht.5. Stator arrangement according to one of claims 1 to 4, wherein the phases associated arrangements of coils (7) each at an angle offset from each other, which corresponds to 360 ° divided by the number of phases.
6. Statoranordnung nach einem der Ansprüche 1 bis 5, wobei bei einer der Grup- pen mit mehreren Spulen (7) eine erste und eine zweite der Spulen (7) jeweils mehrere Statorzähne (4) umschließen, wobei eine Spulenseite der ersten6. Stator arrangement according to one of claims 1 to 5, wherein in one of the groups with several coils (7) a first and a second of the coils (7) each include a plurality of stator teeth (4), wherein a coil side of the first
Spule (7) in einer Nut (5) liegt, die zwischen zwei der mehreren von der zweiten Spule umschlossenen Statorzähnen (4) liegt.Coil (7) is located in a groove (5) which lies between two of the plurality of stator teeth (4) enclosed by the second coil.
7. Statoranordnung nach einem der Ansprüche 1 bis 5, wobei bei einer der Gruppen mit mehreren Spulen (7) eine erste der Spulen (71 ) eine erste Anzahl von Statorzähnen und eine zweite der Spulen (7) jeweils eine zweite Anzahl der Statorzähne (4) umschließen, wobei beide Spulenseiten der ersten Spule (71 ) in Nuten (5) liegen, die zwischen den von der zweiten Spule (72) umschlossenen Statorzähnen (4) liegen.7. A stator assembly according to one of claims 1 to 5, wherein in one of the groups with a plurality of coils (7) a first of the coils (71) a first number of stator teeth and a second of the coils (7) each have a second number of stator teeth (4 ), wherein both coil sides of the first coil (71) lie in grooves (5) which lie between the stator teeth (4) enclosed by the second coil (72).
8. Elektrische Maschine (1 ) mit einer Statoranordnung nach einem der Ansprüche 1 bis 7 und einem im Inneren der Statoranordnung drehbar gelagerten Rotor (3). 8. Electrical machine (1) with a stator assembly according to one of claims 1 to 7 and a rotatably mounted inside the stator rotor (3).
PCT/EP2009/053335 2008-04-03 2009-03-23 Stator apparatus for a synchronous motor WO2009121733A2 (en)

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DE200810000963 DE102008000963A1 (en) 2008-04-03 2008-04-03 Stator arrangement for a synchronous motor
DE102008000963.6 2008-04-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140111057A1 (en) * 2011-06-14 2014-04-24 Toyota Jidosha Kabushiki Kaisha Stator and rotary electric machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2348641A1 (en) * 1973-09-27 1975-04-24 Siemens Ag Stranded winding for electric machines and appts. - has wave-shaped loops running through slots and crossing over missing out occupied slots
US4417192A (en) * 1981-02-27 1983-11-22 Siemens Aktiengesellschaft Sectional motor starting winding circuit for three-phase motors
US20020060505A1 (en) * 2000-09-27 2002-05-23 Hideo Kawamura Generator with diverse power-generation characteristics

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2348641A1 (en) * 1973-09-27 1975-04-24 Siemens Ag Stranded winding for electric machines and appts. - has wave-shaped loops running through slots and crossing over missing out occupied slots
US4417192A (en) * 1981-02-27 1983-11-22 Siemens Aktiengesellschaft Sectional motor starting winding circuit for three-phase motors
US20020060505A1 (en) * 2000-09-27 2002-05-23 Hideo Kawamura Generator with diverse power-generation characteristics

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140111057A1 (en) * 2011-06-14 2014-04-24 Toyota Jidosha Kabushiki Kaisha Stator and rotary electric machine

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DE102008000963A1 (en) 2009-10-08
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