EP3078097A2 - Noyau de stator formant barrière à l'écoulement - Google Patents

Noyau de stator formant barrière à l'écoulement

Info

Publication number
EP3078097A2
EP3078097A2 EP14805891.0A EP14805891A EP3078097A2 EP 3078097 A2 EP3078097 A2 EP 3078097A2 EP 14805891 A EP14805891 A EP 14805891A EP 3078097 A2 EP3078097 A2 EP 3078097A2
Authority
EP
European Patent Office
Prior art keywords
stator
pole
flow barrier
pole tooth
lamination
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP14805891.0A
Other languages
German (de)
English (en)
Inventor
Thomas Mahler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Priority to EP14805891.0A priority Critical patent/EP3078097A2/fr
Publication of EP3078097A2 publication Critical patent/EP3078097A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/022—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with salient poles or claw-shaped poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/325—Windings characterised by the shape, form or construction of the insulation for windings on salient poles, such as claw-shaped poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
    • H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
    • 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

Definitions

  • the present invention relates to a stator pack for use in an electromagnetic machine.
  • the stator packet contains at least one first lamination and a second lamination, each having a ring element with a center, an inner side and an outer side, and at least one pole element, which is positioned on the inner side of the ring element and extends in radial alignment with the center of the ring element, wherein the pole element has a pole tooth with a first Poltechnikende, a second Polzahnende, a top and a first bottom and a second bottom.
  • the present invention relates to a lamination for use in the stator according to the invention.
  • Stator packages are generally known in the art and form an integral part of a stator (or stator) for an electromagnetic machine.
  • the electromechanical machine may be, for example, an electric motor, a generator, a hydraulic motor or a pump.
  • a stator is referred to in this context, the fixed, immovable part of an electromechanical machine and, so to speak, forms the counterpart to a rotor or rotor, which in turn is a moving part of an electromechanical machine.
  • a rotor Inside the stator is a rotor, which in most cases consists of a coil with iron core (the so-called anchor) is rotatably mounted in the magnetic field between the pole pieces of the stator.
  • the stator usually consists of a cylindrical stator packet, which is formed from a plurality of stacked and interconnected laminations. After the individual laminations are joined together to the laminated core, the laminated core and in particular the grooves between the individual Pol dilementen are lined with a plastic insulation layer.
  • Such a stator of the prior art which consists of a plurality of juxtaposed laminations, is shown in particular in DE patent application 10 2009 020 481 A1.
  • a reluctance motor having a rotor and a stator is disclosed.
  • On the stator are single, free-standing stator poles formed, which are surrounded by (coil) windings.
  • the stator poles and the stator walls extending in the circumferential direction between the stator poles are covered by a winding body (ie insulating element) designed as a plastic injection-molded part.
  • This winding body is designed like a shell to the lining of the (coil) windings flanking stator.
  • a problem with these stator packages of the prior art is that the plastic insulation layer is not applied optimally between the pole element and the winding coil on the inside of the stator core to avoid short circuits. Optimal here means that this plastic insulation layer is applied neither too thick nor too thin, since too thick a plastic applied means too high thermal insulation of the stator and a too thin applied plastic does not have sufficient insulation resistance.
  • the liquid insulation plastic is often poured into the stator core at one end of the stator core. Due to the fact that more plastic has to be applied to the ends of the pole tooth than, for example, the base of the pole element and the larger amount of insulating plastic flows more slowly than the smaller amount of insulating plastic, it may happen that the two different amounts do not occur at the same time at the opposite end of the pole Arrive stator packets. As a result, it may happen that the smaller amount of insulating plastic at the end of the stator already cools and hardens before the larger amount of insulation plastic has also arrived at this end of the stator.
  • the object of the present invention is to solve these problems described above and in particular to achieve the best possible insulation on the pole elements or on the inside of the stator.
  • iron i.e., iron in the form of the electrical steel sheet
  • the iron content in the stator packet is only just as large as is necessary for the generation of the magnetic flux in the stator packet. Due to the reduction of the iron content, the stator can be made all together lighter and cheaper in terms of material costs.
  • the subject of the present invention provides a stator pack for use in an electromagnetic machine comprising at least a first lamination and a second lamination each having a ring member having a center, an inner side and an outer side and at least one pole member attached to the inner side of the ring member is positioned and extends in radial alignment with the center of the ring member, wherein the pole member includes a pole tooth having a first Poltechnikende, a second Polzahnende, a top and a first bottom and a second bottom.
  • the pole tooth contains at least one flow barrier element.
  • the flow barrier element By the flow barrier element, the flow rate of a plastic insulation applied in the liquid state is reduced, whereby an optimum plastic insulation layer is achieved.
  • the optimum generated by the presence of the flow barrier element Plastic insulation is characterized in particular by a uniformly thin wall thickness with high dielectric strength.
  • a very good thermal conductivity can be achieved with a low insulation resistance by the uniformly thin wall thickness of the plastic insulation.
  • the flow barrier element is not electromagnetically active in each embodiment, so that the magnetic flux at the pole element is not adversely affected.
  • the flow barrier element can be arranged on the first pole tooth end and / or on the second pole tooth end.
  • a respective flow barrier element at the first and / or second pole tooth end, the flow velocity of the liquid insulation material is optimally reduced and at the same time a suitable support or retention element for the coil winding wound around the pole leg is provided.
  • the flow barrier element can be positioned on the underside of the pole tooth and / or on the Polnierenden.
  • the optional configuration of the flow barrier element in the form of at least one first protrusion protruding from the pole tooth and / or a second protrusion protruding from the pole tooth can ensure that the velocity of the liquid insulation material can be effectively reduced and the coil winding wound around the pole leg can be retained.
  • the survey can be designed in the form of an elongated web or rib. Alternatively, the survey may also have any other suitable shape. According to a further advantageous embodiment, it can be provided that the first survey is greater than the second survey. Due to the different size configuration of the first and second survey the best possible adaptation of the flow barrier element to the outer contour of the pole tooth can be made.
  • the flow barrier element of a first lamination is at a first position on the pole tooth and the flow barrier element of a second lamination located at a second position on the pole tooth.
  • the first position of the flow barrier element of the first lamination plate is applied to the pole tooth offset from the second position of the flow barrier element of the second lamination plate on the pole tooth.
  • the object of the present invention is inter alia to reduce the proportion of iron (ie iron in the form of Electro sheet) in the stator as low as possible, ie only just as large as necessary for the generation of the magnetic flux in the stator.
  • the insulating material in the form of a plastic
  • the necessary clearance and creepage distances for the stator can be maintained.
  • the insulating material can not be applied absolutely homogeneously to the pole elements (ie to the inside of the stator core), so that an inhomogeneous (heterogeneous) wall thickness of the insulating material is produced.
  • Figure 1 is a perspective view of a stator according to the invention consisting of a plurality of individual, sequentially lined up and interconnected laminations according to a first embodiment.
  • FIG. 2 is a front view of a lamination with pole elements and flow barrier elements according to the first embodiment
  • FIG. 3 shows detailed views of the flow barrier elements according to the first embodiment corresponding to the cutouts in FIG. 2;
  • FIG. 4 shows further detail views of the flow barrier elements on the undersides of the pole teeth according to the first embodiment
  • FIG. 5 shows a perspective view of a stator packet according to the invention consisting of a multiplicity of individual laminations arranged one behind the other and interconnected according to a second embodiment
  • FIG. 6 shows a front view of a stator core consisting of laminations with pole elements and flow barrier elements according to the second embodiment
  • FIG. 7 is a sectional view taken along the stator packet according to the second embodiment.
  • FIG. 8 shows a detailed view of the flow barrier elements on the undersides of the pole teeth according to the second embodiment
  • FIG. 9 shows a perspective view of the stator core with an insulating layer on the inside of the stator core
  • FIG. 10 is a front view of the stator with an insulating layer on the inside of the stator core.
  • FIG. 1 is a perspective view of the stator core with a single insulation layer on the inside of the stator core;
  • Fig. 12 is a perspective view of a single segment of the insulating layer.
  • Fig. 1 to 4 show a stator according to the invention 1 according to a first embodiment.
  • 1 shows in particular a perspective view of an inventive stator 1 according to a first embodiment.
  • the stator 1 includes a number of stacked laminations 10th
  • each lamination 10 in turn includes a front side 12, a rear side (not shown), a circular ring member 14 having a center, pole members 16, an inner side 17, and an outer side 18.
  • stator core 1 To form a stator core 1, the individual sheet metal elements 10 are lined up one behind the other and connected to one another.
  • the stator core 1 thus has a cylindrical shape with a first stator end 2, a second stator end 3, an inner side 4, an outer side 5 and a central opening 6.
  • a (not shown) rotor can be inserted and rotatably supported.
  • Each pole member 16 includes a rectangular pole leg 20 having a first pole leg end 22 and a second pole leg end 24.
  • the first pole leg end 22 is fixedly connected to the inside 12 of the ring member 14 and serves inter alia, a coil winding, not shown, which consists of a coil wire, take.
  • the pole tooth 30 has a slightly curved crescent shape and includes a first pole tooth end 32, a second pole tooth end 33, a continuous top 34, a first bottom 35 and a second bottom 36.
  • the first pole tooth end 32 and the second Polstattende 33 are opposite each other and form a first lateral outer surface 37 and a second lateral outer surface 38 on the pole tooth 30th
  • the pole leg 20 extends with the second pole leg end 24 and the pole tooth 30 in radial alignment with the center of the circular ring element 14.
  • the stator pack 1 may also contain a number of stator pack segments.
  • each of the stator packet segments contains at least one pole element (cf., FIG. 7).
  • the Statorb segments are connected by means of (not shown) connecting elements so that the cylindrical shape of the stator core is formed.
  • the fasteners may be plug, slide, click or glue joints.
  • the first underside 35 and the second underside are provided 36 of each pole tooth 30, a flow barrier element 40 is positioned.
  • the flow barrier element 40 is configured in each case essentially in the form of a first rounded elevation 42 and a second rounded elevation 44.
  • the first elevation 42 and the second elevation 44 each extend in the direction of the inner side 17 of the circular ring element 14.
  • the first elevation 42 is slightly smaller than the second elevation 44.
  • the first elevation 42 is closer to the pole leg 20 than the first elevation 42 second elevation 44.
  • a rounded recess 46 in the form of a depression is provided between the first elevation 42 and the second elevation 44.
  • first and second elevation 42, 44 and the rounded recess 46 results in a continuous channel 48 and in the circumferential direction N a wavy surface 49 on the first underside 35 and on the second bottom 36 of the pole tooth 30 in the longitudinal direction of the stator , see. Fig. 4.
  • Fig. 5 to 12 show a stator according to the invention 1 according to a second embodiment.
  • FIG. 5 shows in particular a perspective view of a stator packet 1 according to the invention in accordance with a second embodiment.
  • the stator core 1 includes a number of laminated laminations 10 arranged side by side.
  • the laminations 10 have different thicknesses, i.
  • the stator 1 consists in each case alternately of a first thick sheet metal plate 10 a and a second thin sheet metal plate 10 b.
  • the embodiment of the lamination 10 according to the second embodiment substantially corresponds to the configuration of the lamination 10 according to the first embodiment.
  • a flow barrier element 140 is likewise positioned on the first underside 35 and on the second underside 36 of each pole tooth 30.
  • the flow barrier element 140 is configured essentially in the form of a first rectangular elevation 142 with rounded corners and a second rectangular elevation 144 with rounded corners on the undersides 35, 35 of the pole tooth 30.
  • the first elevation 142 and the second elevation 144 each extend in the direction of the inner side 17 of the circular ring element 14.
  • the first protrusion 142 and the second protrusion 144 have the same height from the bottoms 35, 36 of each pole tooth 30. Between the first elevation 142 and the second elevation 144 is a rounded recess 146 provided in the form of a recess. However, the position of the first elevation 142 and the position of the second elevation 144 are not identical to the undersides 35, 36 of the pole teeth 30 of the individual laminations 10, but applied offset to one another. This means that the first elevation 142 of a flow barrier element 140 is located at a first thick lamination 10a at a different position than the first elevation 142 of a flow barrier element 140 at a second thin lamination 10b, cf. FIGS. 7 and 8.
  • the second land 144 of a flow barrier element 140 is located at the first thick lamination 10a at a position other than the first elevation 142 of a flow barrier element 140 at the second thin lamination 10b.
  • the first elevation 142 of a flow barrier element 140 is located on the first thick laminar lamination 10a in the direction R between the first elevation 142 and the second elevation 144 of a flow barrier element 140 on the second thin laminar lamination 10b.
  • the liquid plastic insulating material passes from the stator end 2 in the direction R to the stator end 3.
  • the aim of applying this liquid insulating resin is uniform, i. without tie lines, and at all points on the inside of the stator 4 1 equal insulation layer 50. That is, this insulating layer 50 should be neither too thick nor too thin. Too thick insulation layer 50 leads to a deteriorated removal of heat to the outside 5 of the stator 1, which is formed by the (not shown) coil winding in the interior of the stator 1. On the other hand, an insulating layer 50 which is too thin does not provide sufficient impact strength against mechanical action.
  • the flow barrier elements 40 only allow small passages or channels 48 to form on the pole teeth 30, through which the liquid insulating material must flow from the first stator end 2 to the second stator end 3.
  • the flow rate of the liquid insulating material is reduced, so that the Insulation material on the inner side 4 of the stator 1 (approximately) has the same flow rate as the insulating material on the undersides 35, 35 of the pole teeth 30.
  • the currents of insulating material on the inside 4 of the stator core 1 and the pole teeth 30 (FIGS. approximately) flow at the same speed and thus arrive at the second stator end 3 (approximately) at the same time.
  • the temperature of these two streams is equal (approximately), thus avoiding unwanted weld lines at the point of confluence of the two streams and a continuous uniform or smooth insulation layer on the inside 4 of the stator 1 can be achieved.
  • the staggered flow barrier elements 140 in the second embodiment do not have any small passages or channels at the bottom sides 35, 36 of the pole teeth 30, but (as already described above) staggered depressions 146 along the bottom sides 35, 36 of the pole teeth 30 in the direction R emerged.
  • the liquid insulating material flows from the first stator end 2 to the second stator end 3.
  • the staggered depressions 146 With the help of the staggered depressions 146, the flow velocity of the liquid insulating material along the lower sides 35, 36 of the pole teeth 30 is effectively reduced. because the liquid insulation material can not flow along a smooth surface, but must alternately move over the individual elevations 142, 144 and depressions 146 of the flow barrier elements.
  • the insulating layer 50 in an optimal thickness are also applied to the pole teeth 30, without a support or retaining element for the wound around the pole leg 20 coil winding or to produce an increase in the magnetic flux density, which may result in magnetic saturation on the pole member 16.
  • An optimally thick or thick insulating layer 50 lays down when applied to the individual flow barrier elements 40, 140 designed as elevations and flows (slowly) between the individual flow barrier elements 40, 140.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

L'invention concerne un noyau de stator destiné à être utilisé dans un appareil électromagnétique, comprenant au moins une première et une deuxième lamelle de tôle pourvues chacune d'un élément annulaire possédant un centre, un côté intérieur et un côté extérieur; et au moins un élément polaire qui est positionné du côté intérieur de l'élément annulaire et qui s'étend suivant une orientation radiale par rapport au centre de l'élément annulaire. L'élément polaire comporte une dent pourvue d'une première extrémité, d'une deuxième extrémité, d'un côté supérieur et d'un premier côté inférieur et d'un deuxième côté inférieur. La dent comprend au moins un élément formant barrière à l'écoulement.
EP14805891.0A 2013-12-04 2014-12-01 Noyau de stator formant barrière à l'écoulement Withdrawn EP3078097A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14805891.0A EP3078097A2 (fr) 2013-12-04 2014-12-01 Noyau de stator formant barrière à l'écoulement

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP13195701.1A EP2882077A1 (fr) 2013-12-04 2013-12-04 Bloc stator avec barrière d'écoulement
PCT/EP2014/076045 WO2015082373A2 (fr) 2013-12-04 2014-12-01 Noyau de stator formant barrière à l'écoulement
EP14805891.0A EP3078097A2 (fr) 2013-12-04 2014-12-01 Noyau de stator formant barrière à l'écoulement

Publications (1)

Publication Number Publication Date
EP3078097A2 true EP3078097A2 (fr) 2016-10-12

Family

ID=49765805

Family Applications (2)

Application Number Title Priority Date Filing Date
EP13195701.1A Withdrawn EP2882077A1 (fr) 2013-12-04 2013-12-04 Bloc stator avec barrière d'écoulement
EP14805891.0A Withdrawn EP3078097A2 (fr) 2013-12-04 2014-12-01 Noyau de stator formant barrière à l'écoulement

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP13195701.1A Withdrawn EP2882077A1 (fr) 2013-12-04 2013-12-04 Bloc stator avec barrière d'écoulement

Country Status (5)

Country Link
US (1) US20160308407A1 (fr)
EP (2) EP2882077A1 (fr)
JP (1) JP2016539616A (fr)
CN (1) CN105794084A (fr)
WO (1) WO2015082373A2 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016072299A1 (fr) * 2014-11-05 2016-05-12 三菱電機株式会社 Noyau d'induit stratifié et induit
FR3041189A1 (fr) * 2015-09-11 2017-03-17 Valeo Equip Electr Moteur Stator de machine electrique tournante muni d'un isolant d'encoche surmoule
CN107124064A (zh) * 2016-02-25 2017-09-01 德昌电机(深圳)有限公司 风机及其外转子电机
DE102017102255A1 (de) 2017-02-06 2018-08-09 Ebm-Papst Mulfingen Gmbh & Co. Kg Stator für einen Elektromotor
JP6633039B2 (ja) * 2017-09-20 2020-01-22 本田技研工業株式会社 ステータ及びその製造方法と、ステータ用コア部材製造装置
DE102017220156B4 (de) * 2017-11-13 2023-05-17 Hanon Systems Efp Deutschland Gmbh Verfahren zum Zusammenbau einer Wasserpumpe
DE102017220157A1 (de) 2017-11-13 2019-05-16 Magna Powertrain Bad Homburg GmbH Wasserpumpe und Verfahren zur Herstellung einer Wasserpumpe
CN109104003A (zh) * 2018-09-18 2018-12-28 珠海格力节能环保制冷技术研究中心有限公司 一种定子铁芯、绝缘骨架、定子以及绝缘骨架的注塑方法

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JP3609649B2 (ja) * 1999-06-29 2005-01-12 三洋電機株式会社 ブラシレスｄｃモータ及びこのモータを用いた冷媒圧縮機
US20060218777A1 (en) * 2001-05-30 2006-10-05 Swift Gerald L Encapsulated armature assembly and method of encapsulating an armature assembly
KR101095556B1 (ko) * 2005-06-13 2011-12-19 삼성전자주식회사 영구자석 전동기
US20090195113A1 (en) * 2008-01-15 2009-08-06 Raser Technologies Induction machine stator apparatus and method
EP2113991B1 (fr) * 2008-05-02 2015-07-15 Siemens Aktiengesellschaft Stator coulé d'une machine dynamoélectrique
WO2010086997A1 (fr) * 2009-01-30 2010-08-05 トヨタ自動車株式会社 Stator et moteur
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Also Published As

Publication number Publication date
CN105794084A (zh) 2016-07-20
EP2882077A1 (fr) 2015-06-10
JP2016539616A (ja) 2016-12-15
WO2015082373A2 (fr) 2015-06-11
WO2015082373A3 (fr) 2015-11-19
US20160308407A1 (en) 2016-10-20

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