WO2020083559A1 - Pompe comprenant un moteur électrique ayant un unité de barres collectrices compact - Google Patents

Pompe comprenant un moteur électrique ayant un unité de barres collectrices compact Download PDF

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Publication number
WO2020083559A1
WO2020083559A1 PCT/EP2019/074085 EP2019074085W WO2020083559A1 WO 2020083559 A1 WO2020083559 A1 WO 2020083559A1 EP 2019074085 W EP2019074085 W EP 2019074085W WO 2020083559 A1 WO2020083559 A1 WO 2020083559A1
Authority
WO
WIPO (PCT)
Prior art keywords
busbar
axis
stator
rotation
pump according
Prior art date
Application number
PCT/EP2019/074085
Other languages
German (de)
English (en)
Inventor
Kazunori Tategata
Original Assignee
Nidec Gpm 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 Nidec Gpm Gmbh filed Critical Nidec Gpm Gmbh
Priority to CN201980069075.6A priority Critical patent/CN113273060A/zh
Publication of WO2020083559A1 publication Critical patent/WO2020083559A1/fr

Links

Classifications

    • 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
    • H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
    • H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with 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
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations

Definitions

  • the present invention relates to a pump with the features of
  • the DC motors comprise a rotor which is connected to a motor shaft and is rotatably mounted in a housing.
  • the rotor is provided with permanent magnets.
  • a stator is arranged around the motor and carries a number of windings on an iron core. When properly controlled, the windings generate a magnetic field that drives the rotor to rotate.
  • the windings are usually wound in three phases and are accordingly provided with three electrical connections via which the windings are connected to one
  • Control unit ECU
  • the conductor rails can be designed as conductor foil. For higher performances, as they are assumed here, the
  • the axis of rotation of the motor is used as the central axis and the axis of symmetry
  • the stator is arranged concentrically with the axis of rotation and the rotor.
  • the axis of rotation also defines an axial direction in which the thickness of the stator stack and the axial length of the motor are specified.
  • the connection side of the stator at which the winding wires are connected to the busbar arrangement is described as the top of the stator.
  • the dimensions are also important, in particular when the motors are to be used in coolant pumps in motor vehicles.
  • the space in motor vehicles is generally limited, and the requirements of
  • the performance data required by the electric motor essentially determine the axial length of the stator pack and of the rotor with the electromagnets arranged thereon.
  • the busbar unit which is required for contacting the winding connection wires of the stator, contributes to the axial length.
  • An electric motor is known from JP 2014-158421 A, in which a busbar unit with three busbars is arranged axially above the stator package and connected to the winding connection wires.
  • the busbar unit comprises a number of busbars which are arranged in the form of a partial circle concentrically to the central axis. Several busbars are stacked one above the other in the axial direction
  • the multiple busbars and the electrical insulation required between them contribute to the axial length of the stator pack, since they are arranged above the winding packs on the stator.
  • a pump has an electric motor with a rotor, which is rotatably mounted about an axis of rotation, and the outside of the rotor
  • the surrounding stator which has a stator core and coils wound on the stator core, is provided, the windings being formed from a winding wire with winding wire end sections and the winding wire end sections being electrically contacted on the end face with at least three busbars, the at least three busbars being coil connection connection elements, power source connection connection elements and have ring segment-like base sections, and wherein the base sections connect the coil connection connection elements and the power source connection connection element.
  • a first busbar and a second busbar are circumferential about the axis of rotation
  • a third busbar is arranged circumferentially about the axis of rotation between the first busbar and the second busbar and the base section of the third busbar in a plane perpendicular to the axis of rotation between one Front of the stator and that of the
  • Base sections of the first and second busbar spanned plane is arranged.
  • the busbars are preferably oriented parallel to one another. They preferably extend perpendicular to the axis of rotation. Because the base sections are not all arranged at an axial height, an orientation of the busbars can be selected which enables a small axial extension and thus a compact pump.
  • the base section of the third busbar lies in the radial direction with respect to the axis of rotation outside the coils and the base sections of the first busbar and second
  • Busbars at least partially cover the coils in the radial direction.
  • the third busbar can thus lie in a free space between the stator core and the top of the stator on the outside of the coils, which saves installation space.
  • the base sections of the first busbar and second busbar preferably have the same radius and are preferably in one Busbar holder arranged along a common circumference.
  • the busbar holder is preferably attached to the top of the stator.
  • the coils are surrounded on the outside by a positioning means on which the busbar holder is held. It is advantageous if the base section of the third busbar lies outside the positioning means in the radial direction with respect to the axis of rotation.
  • the coil connection connection elements preferably have an im
  • the busbars have bevels from the top of the stator
  • the distance in the radial direction between the base section of the third busbar and the base sections of the first busbar and second busbar is selected so large that a coil connecting connection element is accommodated between the base section of the third busbar and the base sections of the first busbar and second busbar can be.
  • the busbars are preferably oriented toward one another such that the third busbar is partially covered by the first busbar and the second busbar.
  • the busbars preferably have bevels pointing in the direction of the upper side of the stator, at the end of which there are the power source connection connection elements, the short side of which extends parallel to the axis of rotation.
  • the pump is an electrical one
  • Coolant pump for motor vehicles in particular a dry runner.
  • a preferred embodiment of the invention is explained in more detail below with reference to the drawings. Components of the same type or having the same function are designated with the same reference symbols in the figures. It
  • FIG. 1 is a perspective view of a busbar unit from above
  • FIG. 3 shows a perspective illustration of a stator with the busbar unit
  • Fig. 4 a perspective view of the busbars, as well
  • Figures 1 and 2 show a busbar unit 1 for a stator of an electric motor in a view from above and in view from below.
  • Busbar unit 1 comprises a busbar holder 2 and three busbars 3, 4, 5 mounted on the busbar holder 2.
  • Busbars 3, 4, 5 are made of an electrically conductive material, preferably metal, in particular copper.
  • the busbar holder 2 consists at least partially or completely of an electrically insulating material, so that short circuits between the busbars 3, 4, 5 can be effectively prevented.
  • the busbar holder 2 is preferably produced by injection molding and extends over part of the busbars 3, 4, 5. In this way, a firm and well-defined physical connection between the busbar holder 2 and the
  • Busbars 3,4,5 are provided.
  • the busbar holder 2 is designed to be positioned on an axial side of the stator (upper side).
  • FIG. 3 shows a stator 6 with an assembled, essentially ring-shaped busbar holder 2.
  • the stator 6 has a stator core 7 which extends coaxially to a longitudinal axis 100 and a plurality of not Stator core segments shown, around which each coils 8 are wound.
  • the coils 8 are only shown schematically.
  • the coils 8 are seen in the direction of the radius, surrounded on the outside by a positioning means 9.
  • the positioning means 9 can be made of an electrically insulating material in order to avoid short circuits between winding wires of different phases.
  • the stator core segments are sequentially arranged in the circumferential direction of the stator 6.
  • the stator core segments can be made at least partially of a ferromagnetic material, such as ferromagnetic steel.
  • the stator 6 is fixedly mounted within a housing of an electric motor and is set up to generate a time-varying magnetic field by means of the coils 8. A not shown
  • the magnetized rotor is mounted in the central opening 10 of the stator 6. It is set up to be rotated through an interaction with the time-varying magnetic field generated by the coils 6.
  • the busbar unit 1 is set up to make electrical contact with the coils 8 of the stator by means of the busbars 3, 4, 5.
  • Busbar unit 1 has arms 11 which are evenly spaced in the circumferential direction, which are angled at their end and are at the end in contact with the positioning means 9 for attachment to the stator 6 and are preferably clipped.
  • the coils 8 are grouped into three phase groups U, V, W.
  • the coils of the respective phase groups U, V, W are formed by a winding wire which is wound around the corresponding stator core segments of the stator core 7 and which can be connected to a power source by means of winding wire end sections 12.
  • FIG. 4 shows the three busbars 3, 4, 5.
  • Each of the busbars 3, 4, 5 has a power source connection connection element 13, which is configured to be electrically connected to a power source, and two coil connection connection elements 14, which are configured to be electrically connected to a coil of the stator 8.
  • the coil connection connection elements 14 have a substantially U-shaped or V-shaped shape and extend in a plane perpendicular to the longitudinal axis 100.
  • the coil connection Connection elements 14 have a U-shaped or V-shaped profile in cross section to the longitudinal axis 100 and each encompass one in
  • the winding wire end section 12 runs essentially parallel to the longitudinal direction. All the openings of the coil connection connection elements 14 for introducing the winding wire end sections 12 point in the circumferential direction except for one opening of a coil connection connection element 14 ′, which is oriented in the opposite direction. The axial height of the coil connection connection elements h can thereby be reduced compared to the prior art, from which it is known that the coil connection connection elements engage the radially extending winding wire end sections from above.
  • the coil connection connection elements 14 are preferably designed as crimp elements which are crimped around the winding wire end sections 12. In this way, the winding wire end sections 12 can be electrically connected to the busbar 3, 4, 5 simply by mechanical deformation of the respective coil connection connection elements 14.
  • the busbar holder 2 has a stator surface 15 shown in FIGS. 1 and 2, which is in contact with the end face of the stator (top side).
  • the power source connection terminal elements 13 are above the stator surface of the bus bar holder 15 in
  • the busbars preferably have one
  • the rectangular power source connector elements have a short and a long side and a certain thickness.
  • the short side thus extends in the longitudinal direction and the long side in the radial direction.
  • All three power source connection elements 13 are preferably in a common plane perpendicular to the longitudinal axis 100.
  • the three busbars 3, 4, 5 are arranged to overlap along the circumference.
  • Each busbar 3, 4, 5 has a base section 30, 40, 50 which connects the coil connection connection elements 14 to the respective power source connection connection elements 13.
  • a first one Busbar 3 and a second busbar 5 are spaced apart and with their base sections 30, 50 in a common plane perpendicular to the longitudinal axis.
  • the base sections 30, 50 of these two busbars 3, 5 have an annular segment-like shape, which form sections of the annular shape of the busbar holder
  • the ring elements of the two busbars 30, 50 have the same radius. In the assembled state, these two ring elements partially cover the end faces of the coils 8. In the circumferential direction between these two busbars 3, 5 there is a third, middle one
  • Busbar 4 is arranged, which is partially covered by the first and second busbar 3,5 in the circumferential direction.
  • the base section of the third busbar 40 also has a ring segment-like shape. However, the radius is larger than the radius of the first and second busbars, so that a distance a is formed along the radius between the first and second busbars 3, 5 and the third busbar 4.
  • Busbars are preferably in the radial direction between the
  • Base sections of the first and second busbars 30, 50 and the base section of the third busbar 40 lie in a different plane perpendicular to the longitudinal axis than the other two base sections 30, 50.
  • the base section of the third busbar 40 lies between the stator 6 and the base sections of the first and second busbars 30, 50.
  • the radius of the base section of the third busbar 40 is selected such that this base section 40 lies radially outside the coils 8 and the positioning means 9. Since the coils 8 and the positioning means 9 project in the longitudinal direction beyond the outside of the stator core 7, the base section of the third busbar can be placed in the existing space above the stator core 7.
  • the third busbar 4 thus has a smaller axial projection over the end face of the stator. This enables an electric motor with a small axial height
  • FIG. 5 shows a coolant pump 16 with an electric motor 17 described above, comprising a rotor 18 and the stator 6
  • the coolant pump 16 is designed as a dry runner.
  • the electric motor 17 is a brushless DC motor.
  • the coolant pump is used in particular in motor vehicles.

Abstract

L'invention concerne une pompe (16) comprenant un moteur électrique (17) comportant un rotor qui est monté de manière à tourner autour d'un axe de rotation (100) et un stator (6) qui entoure le rotor à l'extérieur et comprend un noyau de stator (7) et des enroulements (8) disposés sur le noyau de stator (7), les enroulements (8) étant formés d'un fil de bobinage ayant des sections d'extrémité de fil de bobinage (12) et les sections d'extrémité de fil de bobinage (12) étant en contact électrique du côté frontal avec au moins trois barres collectrices (3, 4, 5), les au moins trois barres collectrices (3, 4, 5) présentent des éléments de raccordement de bobine (14), des éléments de raccordement de source d'alimentation (13) et des sections de base (30, 40, 50) en forme de segment d'anneau, les sections de base (30, 40, 50) reliant les éléments de raccordement de bobine (14) et les éléments de raccordement de source de courant (13), 50), et une première barre collectrice (3) et une seconde barre collectrice (5) étant espacées l'une de l'autre dans la direction circonférentielle autour de l'axe de rotation (100) et les sections de base (30, 50) étant disposées dans un plan commun perpendiculaire à l'axe de rotation (100), et une troisième barre collectrice (4) étant disposée dans la direction circonférentielle autour de l'axe de rotation entre la première barre collectrice (3) et la deuxième barre collectrice (5), et la section de base (40) de la troisième barre collectrice étant disposée dans un plan perpendiculaire à l'axe de rotation entre une face frontale du stator et le plan défini par les sections de base (30, 50) des première et deuxième barres collectrices.
PCT/EP2019/074085 2018-10-26 2019-09-10 Pompe comprenant un moteur électrique ayant un unité de barres collectrices compact WO2020083559A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201980069075.6A CN113273060A (zh) 2018-10-26 2019-09-10 配备带有紧凑型汇流排单元的电机的泵

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018126777.0 2018-10-26
DE102018126777.0A DE102018126777A1 (de) 2018-10-26 2018-10-26 Pumpe aufweisend einen Elektromotor mit kompakter Sammelschieneneinheit

Publications (1)

Publication Number Publication Date
WO2020083559A1 true WO2020083559A1 (fr) 2020-04-30

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ID=67928840

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Application Number Title Priority Date Filing Date
PCT/EP2019/074085 WO2020083559A1 (fr) 2018-10-26 2019-09-10 Pompe comprenant un moteur électrique ayant un unité de barres collectrices compact

Country Status (3)

Country Link
CN (1) CN113273060A (fr)
DE (1) DE102018126777A1 (fr)
WO (1) WO2020083559A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3989407A1 (fr) * 2020-10-20 2022-04-27 Mahle International GmbH Machine électrique
DE102021123833B3 (de) 2021-09-15 2023-03-16 Schaeffler Technologies AG & Co. KG Elektrische Maschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1793476A1 (fr) * 2005-12-01 2007-06-06 Wilo Ag Chemise d'entrefer pour une pompe centrifuge
JP2014158421A (ja) 2014-06-04 2014-08-28 Hitachi Car Eng Co Ltd ブラシレスモータ
DE102016101963A1 (de) * 2016-02-04 2017-08-10 Bühler Motor GmbH Elektromotor für eine Fluidpumpe, modulare Motorfamilie zur Bildung unterschiedlicher Fluidpumpen mit mehreren solcher Elektromotoren und Herstellungsverfahren
WO2017199736A1 (fr) * 2016-05-16 2017-11-23 Ｋｙｂ株式会社 Unité de barre omnibus et machine dynamo-électrique
DE102016123479A1 (de) * 2016-12-05 2018-06-07 Nidec Corporation Sammelschieneneinheit für einen Stator eines Elektromotors

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Publication number Priority date Publication date Assignee Title
JP5417721B2 (ja) * 2008-03-13 2014-02-19 日本電産株式会社 モータ
KR200456092Y1 (ko) * 2010-03-02 2011-10-11 계양전기 주식회사 브러쉬리스 모터용 버스바 장치
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
JP6190599B2 (ja) * 2013-03-08 2017-08-30 Ｋｙｂ株式会社 バスバーユニットの製造方法
KR102301927B1 (ko) * 2014-12-29 2021-09-14 엘지이노텍 주식회사 스테이터 조립체, 이를 포함하는 모터 및 스테이터 조립체의 제조방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1793476A1 (fr) * 2005-12-01 2007-06-06 Wilo Ag Chemise d'entrefer pour une pompe centrifuge
JP2014158421A (ja) 2014-06-04 2014-08-28 Hitachi Car Eng Co Ltd ブラシレスモータ
DE102016101963A1 (de) * 2016-02-04 2017-08-10 Bühler Motor GmbH Elektromotor für eine Fluidpumpe, modulare Motorfamilie zur Bildung unterschiedlicher Fluidpumpen mit mehreren solcher Elektromotoren und Herstellungsverfahren
WO2017199736A1 (fr) * 2016-05-16 2017-11-23 Ｋｙｂ株式会社 Unité de barre omnibus et machine dynamo-électrique
DE102016123479A1 (de) * 2016-12-05 2018-06-07 Nidec Corporation Sammelschieneneinheit für einen Stator eines Elektromotors

Also Published As

Publication number Publication date
CN113273060A (zh) 2021-08-17
DE102018126777A1 (de) 2020-04-30

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