WO2000011775A1 - Stator for an electrical drive motor - Google Patents

Stator for an electrical drive motor Download PDF

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Publication number
WO2000011775A1
WO2000011775A1 PCT/DE1999/001742 DE9901742W WO0011775A1 WO 2000011775 A1 WO2000011775 A1 WO 2000011775A1 DE 9901742 W DE9901742 W DE 9901742W WO 0011775 A1 WO0011775 A1 WO 0011775A1
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WO
WIPO (PCT)
Prior art keywords
tooth
stator
teeth
coils
several
Prior art date
Application number
PCT/DE1999/001742
Other languages
German (de)
French (fr)
Inventor
Wolfgang Krauth
Gerd Knoepfel
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
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2000011775A1 publication Critical patent/WO2000011775A1/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
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H02K1/165—Shape, form or location of the slots

Definitions

  • the invention relates to a stator for an electric drive motor with a number of stator teeth separated by grooves and with a multi-strand winding, in particular three-phase winding, wherein one strand comprises several coils and individual coils each comprise several teeth.
  • Grooved stators for electric drive motors with a number of symmetrical stator teeth and a multi-phase three-phase winding are known.
  • FIG. 1 An example of a known 24-slot stator is shown in FIG. 1.
  • a three-strand or multi-strand three-phase winding (star winding) is constructed in such a way that the individual coils 1, 2 each comprise several teeth 3 and overlap one another.
  • the lower-lying coils 1 prevent the subsequent coils from sliding into the bottom of the slot. The grooves are therefore poorly used.
  • a high winding head results from the overlying coils. 1 is the
  • the efficiency of a stator is essentially determined by its slot filling, i.e. the total conductor cross-section in relation to the total area of the stator.
  • the invention is therefore based on the object of improving a stator for electric drive motors of the generic type in such a way that a higher slot filling is made possible.
  • stator for an electric drive motor of the type described at the outset by combining a plurality of stator teeth, preferably at about half the height of the tooth neck, to form one tooth (combined tooth).
  • stator teeth into one tooth has the important advantage that the asymmetrical, specific design of the stator teeth achieves a high conductor cross-section per slot area, that is, a high nu filling factor, and thus a high power density and high efficiency of the electric drive motor comes about .
  • the stator according to the invention also enables the use of a lower and simpler winding head. This reduces the winding times and the winding resistance. The latter also results in a higher power density and a higher efficiency of the electric drive motor.
  • the coils are wound magnetically overlapping on the stator according to the invention, but are advantageously mechanically separated from one another.
  • a particularly advantageous embodiment of the stator according to the invention provides that three stator teeth, preferably halfway up the tooth neck, are combined to form a tooth with three tooth heads.
  • stator according to the invention is that the basic groove diameter r can be smaller than that of comparable conventional stators, since not all grooves are guided inwards and the individual grooves do not taper as strongly towards the inside. This applies in particular to multi-slot stators. This enables the lower region of the tooth base of the combined tooth to be wider than the tooth base of the original individual teeth. In addition, due to the smaller groove base diameter better use of the installation space, ie a higher power density achieved.
  • a further advantageous embodiment of the invention is characterized in that a single tooth follows each grouped tooth and this arrangement is repeated several times, in particular 6 times, on the circumference of the stator.
  • winding comprises three strands and four coils per strand.
  • two coils are preferably arranged in the outer upper grooves, while the other two coils are arranged in the inner lower grooves.
  • the two coils at the top and the two coils at the bottom of a strand can advantageously be electrically connected in series with one another. As a result, the winding resistance of all strands is the same.
  • FIG. 2 shows a sectional view of a stator with 24 teeth, three stator teeth being combined 6 times to form a tooth with three tooth heads.
  • the three-strand winding scheme with four coils per strand is also shown.
  • the exemplary embodiment described by way of example, shown in FIG. 2, is a 24-slot stator with a three-strand star winding and an 8-pole magnetic circuit.
  • three stator teeth form a magnetic pole.
  • the coils of the winding, in particular the three-phase winding, each comprise three teeth, with only the north pole (or alternatively the south pole) being wound.
  • the cut of the stator core is designed in such a way that three teeth 4, 5 and 6 are combined into one tooth at about half the height of the tooth neck 7.
  • the fourth tooth 8 stands individually.
  • the tooth tips 9 of the outer teeth of the combined tooth can be arranged asymmetrically on their respective tooth necks 10.
  • the lower region 11 of the tooth base of the combined tooth is dimensioned wider than the tooth base of the original individual teeth.
  • the exemplary embodiment described here has three coil strands.
  • four coils 20 to 23 must be wound, two coils 21 and 23 each falling into the outer upper grooves, while the other two coils 20 and 22 come into the inner lower grooves.
  • the winding resistance is initially different in the lower and upper coils due to the different wire lengths. In relation to the entire strand, however, this is compensated for again, since each strand is composed of two lower and two upper coils connected in series. The strands therefore have the same resistances and the current supply is symmetrical.

Abstract

The invention relates to a stator for an electrical drive motor comprising a plurality of teeth separated by grooves and a three-phase winding having, for instance, several phases, wherein a phase comprises several coils (20 to 23) and the individual coils comprise several teeth. In order to improve said stator in such a way that better filling of the grooves and a higher degree of efficiency is achieved, the invention provides that several teeth of the stator (4, 5, 6) are assembled to form a tooth with several heads, preferably at approximately half the height of the neck of the tooth.

Description

Stator für einen elektrischen AntriβbsmotorStator for an electric drive motor
Stand der TechnikState of the art
Die Erfindung betrifft einen Stator für einen elektrischen Antriebsmotor mit einer Anzahl durch Nuten getrennte Statorzähne und mit einer mehrstrangigen Wicklung, insbesondere Drehstromwicklung, wobei ein Strang mehrere Spulen umfaßt und einzelne Spulen jeweils mehrere Zähne umfassen.The invention relates to a stator for an electric drive motor with a number of stator teeth separated by grooves and with a multi-strand winding, in particular three-phase winding, wherein one strand comprises several coils and individual coils each comprise several teeth.
Genutete Statoren für elektrische Antriebsmotoren mit einer Anzahl symmetrischer Statorzähne und einer mehrstrangigen Drehstromwicklung sind bekannt .Grooved stators for electric drive motors with a number of symmetrical stator teeth and a multi-phase three-phase winding are known.
Ein Beispiel für einen bekannten 24-nutigen Stator ist in Fig. 1 dargestellt. Üblicherweise ist eine drei- oder mehrsträngige Drehstromwicklung (Sternwicklung) so aufgebaut, daß die einzelnen Spulen 1, 2 jeweils mehrere Zähne 3 umfassen und sich gegenseitig überlappen. Die tiefer liegenden Spulen 1 verhindern, daß die nachfolgenden Spulen bis in den Nutengrund gleiten können. Die Nuten werden daher schlecht ausgenutzt. Ferner ergibt sich ein hoher Wickelkopf durch die sich überlagernden Spulen. In Fig. 1 ist derAn example of a known 24-slot stator is shown in FIG. 1. Usually, a three-strand or multi-strand three-phase winding (star winding) is constructed in such a way that the individual coils 1, 2 each comprise several teeth 3 and overlap one another. The lower-lying coils 1 prevent the subsequent coils from sliding into the bottom of the slot. The grooves are therefore poorly used. Furthermore, a high winding head results from the overlying coils. 1 is the
Übersichtlichkeit halber nur ein Teil der Spulen gezeichnet. Die beschriebenen Nachteile nehmen nach außen hin immer mehr zu.For the sake of clarity, only a part of the coils have been drawn. The disadvantages described increase more and more towards the outside.
Bekanntlich wird der Wirkungsgrad eines Stators wesentlich von seiner Nutfüllung, d.h. dem gesamten Leiter- guerschnitt in bezug auf die Gesamtfläche des Stators, bestimmt .As is well known, the efficiency of a stator is essentially determined by its slot filling, i.e. the total conductor cross-section in relation to the total area of the stator.
Der Erfindung liegt daher die Aufgabe zugrunde, einen Stator für elektrische Antriebsmotoren der gattungs- gemäßen Art derart zu verbessern, daß eine höhere Nutfüllung ermöglicht wird.The invention is therefore based on the object of improving a stator for electric drive motors of the generic type in such a way that a higher slot filling is made possible.
Vorteile der ErfindungAdvantages of the invention
Diese Aufgabe wird bei einem Stator für einen elektrischen Antriebsmotor der eingangs beschriebenen Art erfindungsgemäß dadurch gelöst, daß jeweils mehrere Statorzähne, vorzugsweise auf etwa halber Höhe des Zahnhalses, zu einem Zahn zusammengefaßt werden (zusammengefaßter Zahn) .This object is achieved according to the invention in a stator for an electric drive motor of the type described at the outset by combining a plurality of stator teeth, preferably at about half the height of the tooth neck, to form one tooth (combined tooth).
Die Zusammenfassung mehrerer Statorzähne zu einem Zahn hat den wichtigen Vorteil, daß durch die unsymmetrische, spezifische Gestaltung der Statorzähne ein hoher Leiterquerschnitt je Nutfläche, das heißt ein hoher Nu füll- faktor, erreicht wird und dadurch eine hohe Leistungsdichte sowie ein hoher Wirkungsgrad des elektrischen Antriebsmotors zustande kommt .The combination of several stator teeth into one tooth has the important advantage that the asymmetrical, specific design of the stator teeth achieves a high conductor cross-section per slot area, that is, a high nu filling factor, and thus a high power density and high efficiency of the electric drive motor comes about .
Der erfindungsgemäße Stator ermöglicht zudem die Ver- wendung eines niedrigeren und einfacheren Wickelkopfes. Dies reduziert die Wicklungszeiten und den Wicklungswiderstand. Letzteres hat ebenfalls eine höhere Leistungsdichte und einen höheren Wirkungsgrad des elektrischen Antriebsmotors zur Folge.The stator according to the invention also enables the use of a lower and simpler winding head. This reduces the winding times and the winding resistance. The latter also results in a higher power density and a higher efficiency of the electric drive motor.
Auf den erfindungsgemäßen Stator werden die Spulen zwar magnetisch überlappend gewickelt, sind aber vorteilhafterweise mechanisch voneinander getrennt .The coils are wound magnetically overlapping on the stator according to the invention, but are advantageously mechanically separated from one another.
Eine besonders vorteilhafte Ausführungsform des erfindungsgemäßen Stators sieht vor, jeweils drei Statorzähne, vorzugsweise auf halber Höhe des Zahnhalses, zu einem Zahn mit drei Zahnköpfen zusammenzufassen.A particularly advantageous embodiment of the stator according to the invention provides that three stator teeth, preferably halfway up the tooth neck, are combined to form a tooth with three tooth heads.
Ein zusätzlicher Vorteil ist es, wenn die Zahnköpfe der äußeren Zähne des zusammengefaßten Zahns unsymmetrisch an ihre jeweiligen Zahnhälse angeordnet sind. Durch diese Unsymmetrie läßt sich die aktive Nutfläche nochmals vergrößern.It is an additional advantage if the tooth heads of the outer teeth of the combined tooth are arranged asymmetrically on their respective tooth necks. This asymmetry allows the active groove area to be increased again.
Ferner ist bei dem erfindungsgemäßen Stator von Vorteil, daß der Nutengrunddurchmess r geringer als bei vergleichbaren herkömmlichen Statoren sein kann, da nicht alle Nuten nach innen geführt werden und sich die einzelnen Nuten nach innen hin nicht so stark verjüngen. Dies gilt insbesondere für vielnutige Statoren. Dadurch wird ermöglicht, daß der untere Bereich des Zahnfußes des zusammengefaßten Zahns breiter sein kann als der Zahnfuß der ursprünglichen einzelnen Zähne. Außerdem wird durch den geringeren Nutengrunddurchmesser eine bessere Ausnutzung des Bauraumes, d.h. eine höhere Leistungsdichte erreicht.Another advantage of the stator according to the invention is that the basic groove diameter r can be smaller than that of comparable conventional stators, since not all grooves are guided inwards and the individual grooves do not taper as strongly towards the inside. This applies in particular to multi-slot stators. This enables the lower region of the tooth base of the combined tooth to be wider than the tooth base of the original individual teeth. In addition, due to the smaller groove base diameter better use of the installation space, ie a higher power density achieved.
Eine weitere vorteilhafte Ausführung der Erfindung ist dadurch gekennzeichnet, daß auf jeweils einen zusammengefaßten Zahn ein alleinstehender folgt und diese Anordnung auf dem Statorumfang sich mehrere Male, insbesondere 6-mal, wiederholt.A further advantageous embodiment of the invention is characterized in that a single tooth follows each grouped tooth and this arrangement is repeated several times, in particular 6 times, on the circumference of the stator.
Prinzipiell können unterschiedliche Wicklungsschemata zur Anwendung kommen. Eine vorteilhafte Ausführung sieht beispielsweise vor, daß die Wicklung drei Stränge und vier Spulen pro Strang umfaßt .In principle, different winding schemes can be used. An advantageous embodiment provides, for example, that the winding comprises three strands and four coils per strand.
Vorzugsweise sind zur Ausbildung eines Stranges jeweils zwei Spulen in den außen liegenden oberen Nuten angeordnet, während die beiden anderen Spulen in den innen liegenden unteren Nuten angeordnet sind.To form a strand, two coils are preferably arranged in the outer upper grooves, while the other two coils are arranged in the inner lower grooves.
Zusätzlich können vorteilhafterweise die beiden oben und die beiden unten liegenden Spulen eines Stranges miteinander elektrisch in Reihe geschaltet werden. Dadurch ist der Wicklungswiderstand aller Stränge gleich.In addition, the two coils at the top and the two coils at the bottom of a strand can advantageously be electrically connected in series with one another. As a result, the winding resistance of all strands is the same.
Bezüglich der Anordnung der zusammengefaßten Zähne auf dem Statorumfang sind auch andere Ausführungen denkbar. So kann beispielsweise vorgesehen werden, daß sich auf dem Statorumfang nur zusammengefaßte Zähne befinden.With regard to the arrangement of the combined teeth on the circumference of the stator, other designs are also conceivable. For example, it can be provided that there are only combined teeth on the stator circumference.
Zeichnungdrawing
Weitere Merkmale und Vorteile der Erfindung sind Gegen- stand der nachfolgenden Beschreibung sowie der zeichnerischen Darstellung eines Ausführungsbeispiels.Further features and advantages of the invention are stood the following description and the graphic representation of an embodiment.
Fig. 1 zeigt einen aus dem Stand der Technik bekannten, obenbeschriebenen Stator,1 shows a stator known from the prior art and described above,
Fig. 2 zeigt schnittbildlich einen Stator mit 24 Zähnen, wobei 6-mal jeweils drei Statorzähne zu einem Zahn mit drei Zahnköpfen zusammengefaßt sind. Das dreisträngige Wicklungsschema mit vier Spulen pro Strang ist ebenfalls gezeigt.2 shows a sectional view of a stator with 24 teeth, three stator teeth being combined 6 times to form a tooth with three tooth heads. The three-strand winding scheme with four coils per strand is also shown.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Bei dem beispielhaft beschriebenen Ausführungsbeispiel , dargestellt in Fig. 2, handelt es sich um einen 24- nutigen Stator mit einer dreistrangigen Sternwicklung und einem 8-poligen Magnetkreis . Somit bilden jeweils drei Statorzähne einen magnetischen Pol . Die Spulen der Wicklung, insbesondere der Drehstromwicklung umfassen entsprechend je drei Zähne, wobei jeweils nur der Nordpol (oder alternativ der Südpol) bewickelt wird.The exemplary embodiment described by way of example, shown in FIG. 2, is a 24-slot stator with a three-strand star winding and an 8-pole magnetic circuit. Thus, three stator teeth form a magnetic pole. The coils of the winding, in particular the three-phase winding, each comprise three teeth, with only the north pole (or alternatively the south pole) being wound.
Der Blechschnitt des Statorpaketes ist derart gestaltet, daß jeweils drei Zähne 4, 5 und 6, auf etwa halber Höhe des Zahnhalses 7, zu einem Zahn zusammengefaßt werden. Der vierte Zahn 8 steht einzeln.The cut of the stator core is designed in such a way that three teeth 4, 5 and 6 are combined into one tooth at about half the height of the tooth neck 7. The fourth tooth 8 stands individually.
Diese Anordnung wiederholt sich auf dem Umfang 6-mal. Aus Fig. 2 ist ersichtlich, daß durch diese Anordnung der Zähne die innen liegenden Spulen 20 einen größeren Wickelraum erhalten und der Nutfüllfaktor gegenüber herkömmlichen Statoren entsprechend größer ist.This arrangement is repeated 6 times on the circumference. From Fig. 2 it can be seen that this arrangement of the teeth gives the coils 20 inside a larger winding space and the slot filling factor opposite conventional stators is correspondingly larger.
Da die Wicklungsdrähte der außenliegenden Spulen 21 jeweils nur an einer Seite der Zähne 4 und 6 anliegen, können die Zahnköpfe 9 der äußeren Zähne des zusammengefaßten Zahns unsymmetrisch an ihren jeweiligen Zahnhälsen 10 angeordnet werden.Since the winding wires of the outer coils 21 each abut only on one side of the teeth 4 and 6, the tooth tips 9 of the outer teeth of the combined tooth can be arranged asymmetrically on their respective tooth necks 10.
Als Folge des erfindungsgemäßen Raumgewinns am Nutengrund wird der untere Bereich 11 des Zahnfußes des zusammengefaßten Zahns breiter bemessen als der Zahnfuß der ursprünglichen einzelnen Zähne.As a result of the gain in space at the bottom of the groove according to the invention, the lower region 11 of the tooth base of the combined tooth is dimensioned wider than the tooth base of the original individual teeth.
Das hier beschriebene Ausführungsbeispiel weist drei Spulenstränge auf. Zur Ausbildung eines Stranges müssen vier Spulen 20 bis 23 gewickelt werden, wobei jeweils zwei Spulen 21 und 23 in die außen liegenden oberen Nuten fallen, während die beiden anderen Spulen 20 und 22 in die innen liegenden unteren Nuten kommen. Dies gilt für alle drei Stränge gleichermaßen. Der Wicklungswiderstand ist in den unteren und oberen Spulen als Folge der unterschiedlichen Drahtlängen zunächst verschieden. Bezogen auf den gesamten Strang wird dies jedoch wieder ausgeglichen, da jeder Strang aus zwei unteren- und zwei oberen in Reihe geschalteten Spulen aufgebaut wird. Die Stränge haben demnach gleiche Widerstände, und die Bestromung ist symmetrisch. The exemplary embodiment described here has three coil strands. To form a strand, four coils 20 to 23 must be wound, two coils 21 and 23 each falling into the outer upper grooves, while the other two coils 20 and 22 come into the inner lower grooves. This applies equally to all three strands. The winding resistance is initially different in the lower and upper coils due to the different wire lengths. In relation to the entire strand, however, this is compensated for again, since each strand is composed of two lower and two upper coils connected in series. The strands therefore have the same resistances and the current supply is symmetrical.

Claims

Patentansprüche claims
1. Stator für einen elektrischen Antriebsmotor mit einer Anzahl durch Nuten getrennte Statorzähne und mit einer mehrstrangigen Wicklung, insbesondere Drehstromwicklung, wobei ein Strang mehrere Spulen umfaßt und einzelne Spulen jeweils mehrere Zähne umfassen, dadurch gekennzeichnet, daß jeweils mehrere Statorzähne (4, 5, 6), vorzugsweise auf etwa halber Höhe ihres Zahnhalses, zu einem Zahn mit mehreren Zahnköpfen zusammengefaßt werden1.Stator for an electric drive motor with a number of stator teeth separated by grooves and with a multi-strand winding, in particular three-phase winding, wherein one strand comprises several coils and individual coils each comprise several teeth, characterized in that in each case several stator teeth (4, 5, 6 ), preferably at about half the height of their tooth neck, can be combined to form a tooth with several tooth heads
(zusammengefaßter Zahn) .(summarized tooth).
2. Stator nach Anspruch 1, dadurch gekennzeichnet, daß jeweils drei Statorzähne (4, 5, 6), vorzugsweise auf etwa halber Höhe des Zahnhalses, zu einem Zahn mit drei Zahnköpfen zusammengefaßt werden.2. Stator according to claim 1, characterized in that three stator teeth (4, 5, 6), preferably at about half the height of the tooth neck, are combined to form a tooth with three tooth heads.
3. Stator nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Zahnkόpfe (9) der äußeren Zähne des zusammengefaßten Zahns unsymmetrisch an ihren jeweiligen Zahnhälsen (10) angeordnet sind.3. stator according to one of the preceding claims, characterized in that the tooth heads (9) of the outer teeth of the combined tooth are arranged asymmetrically on their respective tooth necks (10).
4. Stator nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß der untere Bereich (11) des Zahnfußes des zusammengefaßten Zahns breiter ist als der Zahnfuß nicht zusammengefaßter einzelner Zähne .4. Stator according to one of the preceding claims, characterized in that the lower region (11) of the tooth base of the combined tooth is wider than the tooth base of individual teeth not combined.
5. Stator nach einem der voranstellenden Ansprüche, dadurch gekennzeichnet, daß auf jeweils einen zusammengefaßten Zahn ein alleinstehender Zahn (8) folgt und sich diese Anordnung auf dem Statorumfang mehrere Male wiederholt.5. Stator according to one of the preceding claims, characterized in that a single tooth (8) follows each grouped tooth and this arrangement is repeated several times on the stator circumference.
6. Stator nach Anspruch 5, dadurch gekennzeichnet, daß sich die Anordnung auf dem Statorumfang 6-mal wiederholt.6. Stator according to claim 5, characterized in that the arrangement is repeated 6 times on the stator circumference.
7. Stator nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Wicklung drei Stränge und vier Spulen pro Strang umfaßt.7. Stator according to one of the preceding claims, characterized in that the winding comprises three strands and four coils per strand.
8. Stator nach Anspruch 7, dadurch gekennzeichnet, daß zur Ausbildung eines Stranges jeweils zwei Spulen (21, 23) in den außen liegenden oberen Nuten angeordnet sind, während die beiden anderen Spulen (20, 22) in den innen liegenden unteren Nuten angeordnet sind. 8. Stator according to claim 7, characterized in that two coils (21, 23) are arranged in the outer upper grooves to form a strand, while the other two coils (20, 22) are arranged in the inner lower grooves .
9. Stator nach Anspruch 8, dadurch gekennzeichnet, daß die beiden oben und die beiden unten liegenden Spulen elektrisch in Reihe geschaltet sind.9. Stator according to claim 8, characterized in that the two coils above and the two coils below are electrically connected in series.
10. Stator nach Ansprüche 1 bis 4, dadurch gekennzeichnet, daß sich auf dem Statorumfang nur zusammengefaßte Zähne befinden. 10. Stator according to claims 1 to 4, characterized in that there are only summarized teeth on the stator circumference.
PCT/DE1999/001742 1998-08-24 1999-06-15 Stator for an electrical drive motor WO2000011775A1 (en)

Applications Claiming Priority (2)

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DE19838335.5 1998-08-24
DE1998138335 DE19838335A1 (en) 1998-08-24 1998-08-24 Stator for an electric drive motor

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US8013491B2 (en) 2006-08-15 2011-09-06 Robert Bosch Gmbh Stator for an electric drive motor
WO2017092191A1 (en) * 2015-12-02 2017-06-08 中山大洋电机股份有限公司 Stator punching, stator assembly and external rotor motor
WO2017113512A1 (en) * 2015-12-31 2017-07-06 中山大洋电机股份有限公司 Stator punching sheet, stator assembly and external rotor motor
US20170222503A1 (en) * 2015-01-21 2017-08-03 Zhongshan Broad-Ocean Motor Co., Ltd. External rotor motor and air conditioner comprising the same

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US8013491B2 (en) 2006-08-15 2011-09-06 Robert Bosch Gmbh Stator for an electric drive motor
CN101507083B (en) * 2006-08-15 2011-11-30 罗伯特·博世有限公司 Stator for an electric drive motor
US20170222503A1 (en) * 2015-01-21 2017-08-03 Zhongshan Broad-Ocean Motor Co., Ltd. External rotor motor and air conditioner comprising the same
US10491060B2 (en) * 2015-01-21 2019-11-26 Zhongshan Broad-Ocean Motor Co., Ltd. External rotor motor and air conditioner comprising the same
WO2017092191A1 (en) * 2015-12-02 2017-06-08 中山大洋电机股份有限公司 Stator punching, stator assembly and external rotor motor
WO2017113512A1 (en) * 2015-12-31 2017-07-06 中山大洋电机股份有限公司 Stator punching sheet, stator assembly and external rotor motor

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