WO2020066519A1 - Stator et moteur l'utilisant - Google Patents

Stator et moteur l'utilisant Download PDF

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Publication number
WO2020066519A1
WO2020066519A1 PCT/JP2019/034868 JP2019034868W WO2020066519A1 WO 2020066519 A1 WO2020066519 A1 WO 2020066519A1 JP 2019034868 W JP2019034868 W JP 2019034868W WO 2020066519 A1 WO2020066519 A1 WO 2020066519A1
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WO
WIPO (PCT)
Prior art keywords
coil
stator
conductor
intermediate portion
conductive wire
Prior art date
Application number
PCT/JP2019/034868
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English (en)
Japanese (ja)
Inventor
将 小山
河村　清美
Original Assignee
パナソニックＩｐマネジメント株式会社
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 パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2020066519A1 publication Critical patent/WO2020066519A1/fr

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    • 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
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto

Definitions

  • the present invention relates to a stator and a motor using the stator.
  • Patent Literature 1 discloses a configuration in which, in a three-phase AC motor, coils connected in parallel are star-connected or delta-connected using coils connected in parallel.
  • the present invention is not limited to this, and when the coil units are connected in parallel even in the same phase, the number of connections of the coil units and the like increase. As described above, when the number of connections of the coil portion and the number of connection members used for the connection increase, the number of man-hours and the manufacturing cost of the motor increase.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a stator having a reduced number of connections between coils and the number of connection members for connection, and a motor using the stator.
  • a stator according to the present invention is provided with a ring-shaped yoke and a predetermined interval in a circumferential direction, and from an inner periphery of the yoke toward a center of the yoke.
  • a first conductive wire having a plurality of extending teeth, a first coil portion wound around the first tooth, a second coil portion wound around the second tooth, and a third tooth.
  • a second conductor electrically connected to the first conductor, the third conductor having a wound third coil, and the first conductor being connected to the first coil and the first coil.
  • a first insulating coating covering each surface of the second coil portion; and a first intermediate portion connecting the first coil portion and the second coil portion, wherein the first intermediate portion is provided. The portion and the second conductor form an electrical connection.
  • the first intermediate portion and the second conductor of the first conductor constitute an electrical connection portion, the number of conductors and thus the number of connections between the coil portions can be reduced. Further, with the reduction in the number of connections, the number of connection members for connection can be reduced. As a result, the number of man-hours and cost for manufacturing the stator can be reduced.
  • a motor according to the present invention includes the stator, and a rotor provided at a predetermined interval from the stator.
  • the number of connections between the coil portions and the number of connection members for connection can be reduced, so that the man-hours and cost for manufacturing the stator can be reduced. it can.
  • ADVANTAGE OF THE INVENTION According to the motor of this invention, the manufacturing man-hour and manufacturing cost of a motor can be reduced.
  • FIG. 1 is a top view of a motor according to one embodiment of the present invention.
  • FIG. 2 is a connection diagram of the coil unit.
  • FIG. 3 is an enlarged top view of a part of the stator.
  • FIG. 4 is a sectional view taken along line IV-IV in FIG.
  • FIG. 5 is a schematic diagram showing a winding state of the coil unit when the stator is deployed.
  • FIG. 1 is a top view of the motor according to the present embodiment
  • FIG. 2 is a connection diagram of each coil unit in the motor.
  • illustration and description of external wires serving as connecting wires between coil portions and connecting portions to an external power supply are omitted. These will be described later.
  • the radial direction of the motor 1000 is referred to as “radial direction”, the outer circumferential direction is referred to as “peripheral direction”, and the direction in which the output shaft 210 of the motor 1000 extends (the direction perpendicular to the plane of FIG. It may be called "direction”.
  • the center side of the motor 1000 may be referred to as a radially inner side, and the outer peripheral side may be referred to as a radially outer side.
  • the motor 1000 has the stator 100 and the rotor 200. Although the motor 1000 has other components, for example, components such as a motor case and a bearing that supports the output shaft, illustration and description thereof are omitted for convenience of description.
  • the stator 100 is provided between an annular yoke 20, a plurality of teeth 10 connected to the inner circumference of the yoke 20 and provided at equal intervals along the inner circumference, and teeth 10 adjacent to each other in the circumferential direction. And the coil portions U1 to W4 housed in the slots 30, respectively, and are arranged radially outside of the rotor 200 with a certain interval from the rotor 200. .
  • the teeth 10 and the yoke 20 are formed by, for example, punching out electromagnetic steel sheets containing silicon or the like after lamination.
  • Each of the coil portions U1 to U4 is formed of a first conductive wire 51 made of copper or the like, and is wound around each of the four teeth 10 by n turns (n is an integer of 2 or more) with the insulator 40 interposed therebetween. Housed within.
  • an insulating coating (first insulating coating) 61 is provided on the surface of the first conductive wire 51.
  • each of the coil portions V1 to V4 is formed of a second conductive wire 52 made of copper or the like, and is wound around each of the four teeth 10 by n turns (n is an integer of 2 or more) with the insulator 40 interposed therebetween.
  • An insulating coating (second insulating coating) 62 is provided on the surface of the second conductive wire 52.
  • the coil portions W1 to W4 are formed of a third conductive wire 53 made of copper or the like, and are wound around each of the four teeth 10 by n turns (n is an integer of 2 or more) with the insulator 40 interposed therebetween. Housed within.
  • An insulating coating (third insulating coating) 63 is provided on the surface of the third conductive wire 53. Details of the structure of the stator 100 will be described later.
  • the rotor 200 has an output shaft 210 disposed at the axis and a magnet 220 facing the stator 100 and having N and S poles alternately arranged along the outer peripheral direction of the output shaft.
  • the material, shape, and material of the magnet 220 can be appropriately changed according to the output of the motor 1000 and the like.
  • a coil portion U1 and a coil portion U2 connected in series, and a coil portion U3 and a coil portion U4 connected in series are connected in parallel to form a U-phase coil portion.
  • the V-phase coil unit is formed by connecting the coil units V1 and V2 connected in series and the coil unit V3 and the coil unit V4 connected in series and connected in parallel.
  • the W-phase coil portion is formed by connecting the coil portion W1 and the coil portion W2 connected in series, and the coil portion W3 and the coil portion W4 connected in series and connected in parallel.
  • the aforementioned U-phase coil portion may be referred to as the coil portion 54, the V-phase coil portion as the coil portion 55, and the W-phase coil portion as the coil portion 56, respectively.
  • the coil section 54, the coil section 55, and the coil section 56 are delta-connected.
  • FIG. 3 is an enlarged top view of a part of the stator
  • FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3
  • FIG. 5 shows a winding state of a coil portion when the stator is expanded. The schematic diagram is shown respectively.
  • the yoke 20 is configured to connect the plurality of divided yokes 21 along one direction and to form an annular shape by joining both ends of the yokes 21 by welding or the like.
  • the teeth 10 are connected to each of the plurality of divided yokes 21, and the insulators 40 are also mounted for each of the divided yokes 21 and the teeth 10 connected thereto.
  • a space between adjacent divided yokes 21 is configured to be bendable within a predetermined range.
  • the insulator 40 is a component made of an insulating material attached to each of the plurality of teeth 10 and the plurality of divided yokes 21 and electrically separates the coil units U1 to W4 from the teeth 10 and the yoke 20.
  • a plurality of terminal pins 71 to 76 are provided on the insulator 40 at predetermined intervals (see FIG. 1).
  • the terminal pins 71 to 76 are made of copper, a copper alloy, or the like, and are conductive members bent so as to project downward as shown in FIGS. Further, the terminal pins 71 to 76 are disposed above the insulator 40 and are electrically separated from the teeth 10 and the yoke 20. The terminal pins 71 to 76 are configured to electrically connect two different ones of the first to third conductive wires 51 to 53 to each other. For example, as shown in FIG. 4, the first and third conductive wires 51 and 53 are joined together by fusing while being sandwiched between the terminal pins 71.
  • the insulating coatings 61 and 63 are melted by fusing, and the conductor portions of the first and third conductive wires 51 and 53 are separated. It is bare.
  • the first conductor 51 and the third conductor 53 are electrically connected by crimping the exposed portions together.
  • fusing refers to a method of joining a plurality of members by heating a part to be connected between the plurality of members in a state of being pressed by being sandwiched between jigs.
  • the jig may be configured with two electrodes, and a plurality of conductive wires may be sandwiched between the two electrodes to heat the conductive wires.
  • the coil portions U1, U2 and the coil portions U3, U4 are separated from each other with the coil portions W1, W2, V1, V2 therebetween, while the first conductor 51 Are continuously wound over four teeth 10 corresponding to the coil portions U1 to U4, respectively.
  • the coil portions V1, V2 and the coil portions V3, V4 are separated from each other across the coil portions W1, W2, U3, U4, while the second conductor 52 is connected to the coil portions V1 to V4 respectively. It is continuously wound over the four corresponding teeth 10.
  • the coil portions W1 and W2 and the coil portions W3 and W4 are separated from each other with the coil portions U3, U4, V3 and V4 interposed therebetween, while the third conductor 53 is connected to the coil portions W1 to W4, respectively. It is continuously wound over two teeth 10.
  • the terminal pin 71 is connected to an intermediate portion 53a of the third conductive wire 53, specifically, a portion connecting the coil portions W2 and W4 and one end of the first conductive wire 51, specifically, one end of the coil portion U1.
  • the terminal pin 72 is connected to an intermediate portion 52a of the second conductive wire 52, specifically, a portion connecting the coil portions V2 and V4 and one end of the third conductive wire 53, specifically, one end of the coil portion W3.
  • the terminal pin 73 is connected to the intermediate portion 51a of the first conductive wire 51, specifically, a portion connecting the coil portions U2 and U4 and one end of the second conductive wire 52, specifically, one end of the coil portion V3. Are electrically connected.
  • the terminal pin 74 electrically connects the intermediate portion 53a of the third conductive wire 53 to one end of the first conductive wire 51, specifically, one end of the coil portion U3.
  • the terminal pin 75 electrically connects the intermediate portion 52a of the second conductor 52 and one end of the third conductor 53, specifically, one end of the coil portion W1.
  • the terminal pin 76 electrically connects the intermediate portion 51a of the first conductive wire 51 and one end of the second conductive wire 52, specifically, one end of the coil portion V1.
  • external terminals for introducing U-, V-, and W-phase currents from an external power supply to the coil portions 54 to 56 respectively include intermediate portions 51 and 52a of the first to third conductive wires 51 to 53. , 53a.
  • a U-phase external terminal may be connected to the terminal pin 71 together with the first conducting wire 51 and the third conducting wire 53.
  • the first conductor 51 and the third conductor 53 including the external terminals may be connected by fusing.
  • the present invention is not limited to this.
  • an external terminal may be connected in the middle of a crossover between coil units (not shown). In that case, they may be connected to each other by fusing.
  • the stator 100 is disposed at a predetermined interval in the circumferential direction from the annular yoke 20, and from the inner periphery of the yoke 20 to the center of the yoke 20.
  • a plurality of teeth 10 extending toward the front, a coil unit (first coil unit) U2 wound around one tooth (first tooth) of the plurality of teeth 10, and a plurality of teeth 10 wound around the second tooth
  • a first conductive wire 51 having at least a coil portion (second coil portion) U4; and a coil portion (third coil portion) V2 wound around a third tooth and electrically connected to the first conductive wire 51.
  • a second conducting wire 52 connected to the second conducting wire 52.
  • the first conductive wire 51 further includes an insulating coating (first insulating coating) 61 covering each surface of the coil portions U1 to U4, and a first intermediate portion 51a connecting the coil portions U2 and U4.
  • the first intermediate portion 51 and the second conductor 52 constitute an electrical connection.
  • the electrical connection is formed by joining the first intermediate portion 51 and the second conductor 52 by fusing.
  • the second conductor 52 has a coil portion (fourth coil portion) V4 wound around the fourth teeth.
  • the second conductive wire 52 includes a second intermediate portion 52a that connects between the coil portions V2 and V4, and an insulating coating (second insulating coating) 62 that covers the surfaces of the coil portions V1 to V4.
  • stator 100 has a plurality of coil portions W1 to W4 continuously wound over two or more teeth of a plurality of teeth 10, and is electrically connected to second conductive wire 52.
  • a third conductive wire 53 is further provided, and the second intermediate portion 52a and the third conductive wire 53 are joined by fusing.
  • stator 100 By configuring the stator 100 as described above, the number of connections between the coil units can be reduced.
  • one coil portion having both ends is wound around one tooth 10, and different coil portions are electrically connected to each other using a bridge wire or a bus bar.
  • a bridge wire or a bus bar In particular, as shown in FIGS. 2 and 5, in a configuration in which the coil units are connected in parallel in each of the U, V, and W phases, each end of the coil units connected in parallel is connected using a connection member or the like. And the number of connections between the coil portions has increased.
  • the present embodiment in connecting two of the first to third conductors 51 to 53 constituting each coil portion, an intermediate portion of one conductor and one end of another conductor are connected. And the electric connection portion, the number of connections between the conductors and thus between the coil portions can be reduced. Further, with the reduction in the number of connections, the number of connection members for connection can be reduced. In particular, since fusing is used as the connection method, the shapes of the terminal pins 71 to 76 which are connection members for connection can be simplified. Further, a step of removing a part of each of the insulating coatings 61 to 63 is not required to connect the conductors. Thus, the number of manufacturing steps and manufacturing cost of the stator 100 can be reduced.
  • connecting the coil portions in each phase in parallel does not require a connection step and a connection member used for the connection portion. Manufacturing costs can be significantly reduced.
  • the yoke 20 has a terminal pin 76 which is a conductive connecting member sandwiching the first intermediate portion 51a and the second conductive wire 52, and the first intermediate portion 51a and the second conductive wire 52
  • the electrical connection portion is configured to be sandwiched between the terminal pins 76. This electrical connection is also formed by joining the first intermediate portion 51a and the second conductor 52 by fusing.
  • the coil portions U2, U4 and the coil portion V1 can be securely joined, and these connection portions can be stably held. Can be. Thus, the coil portions can be connected with high reliability.
  • the stator 100 further includes an insulator 40 that covers each of the plurality of teeth 10 and the yoke 20, and the terminal pins 71 to 76 are provided on the insulator 40.
  • the teeth 10 and the yoke 20 can be easily electrically separated from the first to third conductive wires 51 to 53 connected to the terminal pins 71 to 76.
  • the stator 100 is disposed at a predetermined interval in the circumferential direction with the annular yoke 20, and the center of the yoke 20 extends from the inner circumference of the yoke 20.
  • a plurality of teeth 10 extending toward the side.
  • the stator 100 is wound around different teeth 10 and includes a coil unit 54 including a plurality of coil units U1 to U4 in which the coil units U1, U2 and the coil units U3, U4 are connected in parallel.
  • a first conductive wire 51 having a first intermediate portion 51a connecting the coil portion U2 and the coil portion U4 in the portion 54, and each of the first conductive wires 51 are wound around different teeth 10, and the coil portions V1, V2 and the coil portions V3, V4
  • a second conductive wire 52 having a coil portion 55 including a plurality of coil portions V1 to V4 connected in parallel, and a second intermediate portion 52a connecting the coil portion V2 and the coil portion V4 in the coil portion 55.
  • a coil unit 56 including a plurality of coil units W1 to W4 each wound around a different tooth 10 and connected in parallel with the coil units W1 and W2 and the coil units W3 and W4.
  • the coil portions 54 to 56 are wound around a plurality of different teeth 10, respectively, and include a first intermediate portion 51a included in the first conductive wire 51, a second intermediate portion 52a included in the second conductive wire 52, and a third conductive wire.
  • the third intermediate portion 53a included in the second member 53 constitutes an electrical connection portion that is electrically connected.
  • the first conductive wire 51, the second conductive wire 52, and the third conductive wire 53 are joined by fusing at the first intermediate portion 51a, the second intermediate portion 52a, and the third intermediate portion 53a, respectively. ing. That is, this electrical connection is also formed by fusing.
  • the number of connections between the coil units can be reduced. Further, with the reduction in the number of connections, the number of connection members for connection can be reduced. Thus, the number of manufacturing steps and manufacturing cost of the stator 100 can be reduced.
  • the space factor of the coil unit can be improved. This will be further described.
  • the use of the coil units connected in parallel can reduce the current density flowing through the coil units as compared with the use of the coil units connected in series. For this reason, the latter can make the wire diameter of the conductor thinner, and can improve the space factor of the coil portion in the slot.
  • the wire diameter of the conductor can be reduced.
  • the number of connections between the coil units and the number of connecting members used for the coil units can be reduced. Can be realized. Accordingly, the number of manufacturing steps and manufacturing cost of the stator 100 can be reduced, and the space factor of the coil portion can be increased.
  • the yoke 20 is configured to connect the plurality of divided yokes 21 along one direction and to form an annular shape by joining both ends of the yokes 21 by welding or the like.
  • the coil units U1 to W4 can be simply wound around the teeth 10, respectively, and the structure of the winding machine used for winding the coil units U1 to W4 can be simplified. . As a result, the number of manufacturing steps and manufacturing cost of the stator 100 can be further reduced.
  • the motor 1000 includes at least the stator 100 and the rotor 200 provided at a predetermined interval from the stator 100.
  • the number of connections between the coil portions and the number of connection members used for the coil portions can be reduced, so that the number of manufacturing steps and manufacturing cost of the motor 1000 can be reduced. Further, by connecting the coil units in parallel and in a delta connection, the space factor of the coil units can be increased, and a highly efficient motor 1000 can be realized.
  • the insulator 40 is mounted on the split yoke 21 so as to cover the entire surface of the split yoke 21. Good.
  • the inner surfaces of the terminal pins 71 to 76 have a size approximately equal to or larger than the diameter of the first to third conductive wires 51 to 53.
  • One or more small protrusions or the like may be provided.
  • the first to third conductive wires 51 to 53 are formed by coating insulating surfaces 61 to 63 on the surface of an electric wire made of copper, respectively, but another conductor such as aluminum may be used as a material of the electric wire. .
  • the stator according to the present invention can reduce the number of connections between the coil portions, and is therefore useful when applied to, for example, a delta-connected three-phase motor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

Un stator (100) selon la présente invention comporte : une culasse annulaire (20) ; une pluralité de dents (10) qui s'étendent à partir de la circonférence interne de la culasse (20) vers le centre de la culasse (20) ; un premier fil conducteur (51) qui a une partie bobine (U2) qui est enroulée autour d'une première dent et une partie bobine (U4) qui est enroulée autour d'une deuxième dent ; et un second fil conducteur qui a une partie bobine (V2) qui est enroulée autour d'une troisième dent, et qui est électriquement connectée au premier fil conducteur (51). Le premier fil conducteur (51) a en outre un film de revêtement isolant (61) qui recouvre les surfaces des parties bobine (U1-U4) et une première partie intermédiaire (51a) qui relie la partie bobine (U2) et la partie bobine (U4) l'une à l'autre. La première partie intermédiaire (51) et le second fil conducteur (52) constituent une partie de connexion électrique.
PCT/JP2019/034868 2018-09-26 2019-09-04 Stator et moteur l'utilisant WO2020066519A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018180348 2018-09-26
JP2018-180348 2018-09-26

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WO2020066519A1 true WO2020066519A1 (fr) 2020-04-02

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PCT/JP2019/034868 WO2020066519A1 (fr) 2018-09-26 2019-09-04 Stator et moteur l'utilisant

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009060600A1 (fr) * 2007-11-09 2009-05-14 Mitsubishi Electric Corporation Stator pour machine électrique tournante et son procédé de fabrication
JP2010130803A (ja) * 2008-11-28 2010-06-10 Jtekt Corp 多相交流モータ及び電動パワーステアリング装置
JP2012228007A (ja) * 2011-04-15 2012-11-15 Asmo Co Ltd バスバー装置、ステータ、モータ及びステータの製造方法
JP2014072925A (ja) * 2012-09-27 2014-04-21 Aisin Seiki Co Ltd 複数相のステータコイルの接続構造
JP2015126563A (ja) * 2013-12-25 2015-07-06 株式会社マキタ 電動工具

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009060600A1 (fr) * 2007-11-09 2009-05-14 Mitsubishi Electric Corporation Stator pour machine électrique tournante et son procédé de fabrication
JP2010130803A (ja) * 2008-11-28 2010-06-10 Jtekt Corp 多相交流モータ及び電動パワーステアリング装置
JP2012228007A (ja) * 2011-04-15 2012-11-15 Asmo Co Ltd バスバー装置、ステータ、モータ及びステータの製造方法
JP2014072925A (ja) * 2012-09-27 2014-04-21 Aisin Seiki Co Ltd 複数相のステータコイルの接続構造
JP2015126563A (ja) * 2013-12-25 2015-07-06 株式会社マキタ 電動工具

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