EP2191557A2 - Support de bobine pour fixer les têtes d'enroulements statoriques d'un moteur électrique - Google Patents

Support de bobine pour fixer les têtes d'enroulements statoriques d'un moteur électrique

Info

Publication number
EP2191557A2
EP2191557A2 EP08804268A EP08804268A EP2191557A2 EP 2191557 A2 EP2191557 A2 EP 2191557A2 EP 08804268 A EP08804268 A EP 08804268A EP 08804268 A EP08804268 A EP 08804268A EP 2191557 A2 EP2191557 A2 EP 2191557A2
Authority
EP
European Patent Office
Prior art keywords
stator
base plate
bobbin holder
pole
holder according
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Withdrawn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
EP08804268A
Other languages
German (de)
English (en)
Inventor
Alfred Binder
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete 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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2191557A2 publication Critical patent/EP2191557A2/fr
Withdrawn legal-status Critical Current

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

Definitions

  • the invention relates to a coil holder for fixing a winding head of stator windings to a stator of an electric motor with pronounced stator poles, each of the stator poles terminating in a pole piece, the coil holder having a wall extending axially outwards in the region of the pole face from the stator end face. which is formed in particular in the form of a ring segment.
  • Such a coil holder is already known from the published patent application DE 21 47 927.
  • a bobbin holder for fixing the field coil package of a two-pole electric motor is disclosed, which is the same shape for all four stator poles of the two-pole laminated stator core shown.
  • This coil holder has in each case two slot closure wedges, which extend at least up to half of the stator pole slots.
  • These slot closure wedges are integrally formed on a wall in the form of a ring segment, which extends axially outward in the region of the pole face of the stator pole from the stator end face.
  • a Statorendfit for a stator with two distinct stator poles is shown, in each of which a coil support member in the form of a ring-segment-shaped wall is formed in the region of the two pole horn, which extends from the stator end face axially outwardly.
  • a coil support member in the form of a ring-segment-shaped wall is formed in the region of the two pole horn, which extends from the stator end face axially outwardly.
  • the present invention has for its object to provide a cost-effective electric motor, in particular a universal motor, in particular for use in a household appliance, available.
  • An internal-rotor electric motor has a rotor and a stator, wherein the rotor is rotatably arranged in an inner or rotor space encompassed by the stator about a rotor axis.
  • the rotor defines an axial direction parallel to the rotor axis, a radial direction perpendicular to the rotor axis, and a circumferential direction along concentric circles in planes perpendicular to the rotor axis with the rotor axis centered.
  • an electric motor is understood to mean an internal rotor electric motor, although an analogous application in an external rotor electric motor is not excluded and should be included in the scope of protection.
  • stator poles extend from a stator body, which comprises the interior space and thus the rotor, radially into this interior space in the direction of the rotor.
  • the stator poles each have a pole neck which ends in a polhorn widened in comparison to the pole neck.
  • Pol which are preferably formed circular segment-shaped, a rotor space is limited, in which the rotor of the electric motor is rotatably arranged.
  • two stator slots are formed by its pole neck and its pole piece, into which stator windings can be inserted. These stator windings introduced into the stator slots protrude beyond the stator end faces and form the so-called winding heads there.
  • a wall is arranged to fix such a winding head of stator windings on a stator of an electric motor with pronounced stator poles, in the region of the pole horn of one of the stator poles, which extends axially from the stator end face with respect to the rotor axis, ie away from the stator, and formed in particular in the form of a ring segment.
  • the ring segment has the same curvature as the corresponding pole piece.
  • the shape of the wall formed on the base plate determines the position of the winding head with respect to the stator end face and in particular with respect to the pole piece, whereby the stator magnetic field can be influenced.
  • This wall is formed on a base plate of the bobbin holder, which rests on the stator end face and covers only a segment of the stator end face in the region of the stator pole.
  • the base plate for fixing the bobbin holder is formed on the stator.
  • the associated stator which has the pronounced stator poles, is designed for fixing the coil holder, for example by latching or counter-latching elements, recesses or the like.
  • This embodiment of the bobbin holder has the advantage that the base plate of the bobbin holder lies between the stator windings in the region of the winding overhang and the stator end face, so that the base plate of the bobbin holder serves as insulation between the two.
  • the winding heads are clearly defined by the coil holder, in particular by its ring-segment-shaped wall, in the radial direction with respect to the rotor axis, so that a Hineinragen of stator windings is prevented in the rotor space.
  • the bobbin holder is arranged on the stator before the winding process, so that the wall formed as a ring segment of the bobbin holder during Winding the stator windings serves as a winding support member.
  • stator windings are already fixed by the coil holder during winding in the winding machine in relation to the rotor axis and secured against slipping in the radial direction, so that a subsequent fixation of the stator windings in the winding heads, for example by cable ties, can be omitted.
  • the base plate of the bobbin holder only covers the stator end face in one segment, so that it is limited in the circumferential direction to the region of the stator pole. In this way, material can be saved, as can be dispensed with a Statorendusion covering the entire stator end face. This material saving leads to a significant reduction in production costs.
  • the base plate of the bobbin holder in the circumferential direction is at most as wide as the width of the pole neck, preferably it covers the pole neck in the circumferential direction even only partially.
  • the base plate extends outwardly from the inner edge of the stator formed by the pole piece to the outer edge of the stator.
  • the base plate of the coil holder acts as a segment of a Statorendin, which isolates the stator of the stator windings. Nevertheless, a heat dissipation over the stator end face over the free areas of the coil holder is well possible because the stator end face is not covered in its entire surface by a Statorendusion.
  • At least one mounting pin for receiving in a recess of the stator is integrally formed on the stator facing the underside of the base plate.
  • the associated stator has at least one corresponding recess for receiving this mounting pin of the bobbin holder.
  • this recess is formed by a bore.
  • the recess in the production of the individual stator laminations in particular by punching done. The coil holder can thus be positioned or mounted in a simple manner on the stator by the coil holder is inserted with its mounting pin in the corresponding recess of the stator.
  • the mounting pin is arranged on the base plate such that it is suitable for receiving in a center of the ends of the Polhoms and / or is arranged centrally to the inner and the outer edge of the stator at the position of the stator pole arranged recess of the stator.
  • the recess is arranged centrally of the ends of the pole of one of its stator poles and / or centrally of the inner and outer edges of the stator at the position of the stator pole. At this position of the stator, the formation of the recess is easily possible because the recess there has little effect on the magnetic field generated by the stator windings.
  • the mounting pin is formed with a cross-shaped cross-section for a rotationally secure receptacle in a cross-slot-shaped recess of the stator.
  • the associated stator according to the recess is formed like a crosshead.
  • At least one security against rotation is formed on the base plate of the bobbin holder.
  • the anti-rotation is formed on the outer edge of the stator facing the end of the base plate, so that the rotation is formed to rest on the outside of the stator.
  • the rotation is formed for example by one or more lugs, which are integrally formed on the stator front surface facing the underside of the base plate of the bobbin holder. These lugs are preferably on the outside of the stator, so that a rotation of the bobbin holder is not possible.
  • the anti-rotation device is designed to rest in a recess formed on the outside of the stator. Preferably, this recess is formed on the stator in order to optimize the magnetic flux in the stator. In this way, no adverse influence on the stator magnetic field is exerted by the rotation.
  • supports for the winding head can be formed, so that the stator windings are held at a distance from the base plate.
  • a support is integrally formed on each of the two adjoining the ring-segment-shaped wall, opposite edges of the base plate.
  • the ring-segment-shaped wall has an opening. Through this opening, the stator windings of the respective winding head are accessible from the rotor space. Thus, air can flow from the rotor space to the stator windings through the opening.
  • the opening extends axially outwardly from one of the stator face and the base plate, respectively. in the direction away from the base plate or end face, offset the upper edge of the opening up to one from the upper edge axially inwards, i. in the direction of the base plate or Statorstirn Chemistry, offset bottom edge of the opening. Laterally, the opening is bounded by two, spaced apart side walls. Through the two side walls of the upper edge of the opening is connected to the lower edge.
  • the distance between the side walls decreases from the side facing the rotor space of the ring-segment-shaped wall in the radial direction to the outside, so that the opening is funnel-shaped.
  • the side walls extend in the radial direction in the form of a convex arc. In this way, the transition from the side facing the rotor chamber side of the ring-segment-shaped wall to the side walls can be formed rounded. Thereby noise can be avoided or at least reduced, which can be caused by the air flow generated due to the rotor movement.
  • the lower edge of the opening is formed by the base plate.
  • the lower edge of the opening formed by the base plate is displaced radially outward, ie away from the rotor space, by an edge of the pole piece delimiting the rotor space.
  • the opening extends in the axial direction in the region of the pole piece to the stator end face.
  • the side walls of the opening extend in this case from the rotor chamber side facing the annular segment-shaped wall at least up to the radially outwardly offset, formed by the base plate lower edge of the opening. In this way, an air flow through the side walls is led to the stator windings.
  • the opening may be formed as a rectangular window in the ring-segment-shaped wall.
  • Rectangular means in this context that the window is not flat, but follows the curved course of the ring-segment-shaped wall, resulting in a rectangle for the window when the curved path is displayed on a plane or unrolled.
  • the rectangle is defined in the rotor chamber facing surface of the annular segment-shaped wall by the upper edge, the lower edge running parallel to the upper edge and the two mutually parallel side walls arranged at right angles to the upper edge and the lower edge.
  • the ring-segment-shaped wall of the bobbin holder may have the opening in the area between the supports, so that air can circulate through the gap formed by the supports, the stator windings of the winding head and the base plate of the bobbin holder.
  • the side walls of the opening are formed by side walls of the supports.
  • At least one guide element for a connecting line of an electric motor component is integrally formed on the upper side of the base plate facing away from the stator.
  • This engine component may for example be a carbon brush and / or a thermal monitor and / or a tachometer, wherein the connecting line may be formed, for example, as a single wire or stranded wire.
  • the guide element can simultaneously serve to fix the connecting line to the stator.
  • the guide element is designed, for example, in the form of a labyrinth. If a releasable attachment is provided, such as a clamped connection, the component can easily be replaced in the event of a defect or malfunction.
  • a different use of the guide elements is possible for different engine variants.
  • a radially outwardly extending, serving as an axial end boundary of the winding head collar is formed, which has an opening for a mounting temple.
  • the coil holder is U-shaped, wherein the base plate and the collar each form a leg of the U, which are interconnected by the ring-segment-shaped wall.
  • the angle between the base plate and the wall of the bobbin holder is an acute angle, i. less than ninety degrees.
  • the wire tension is compensated in the winding process of the stator windings.
  • the rotor mounting is facilitated, since the rotor receiving portion of the stator is more easily accessible through the outwardly inclined wall of the bobbin holder.
  • the angle between the wall and the collar of the bobbin holder is an obtuse angle, i. greater than ninety degrees.
  • the collar is arranged parallel to the base plate of the bobbin holder. In this way, the good accessibility of the space formed by the base plate, the wall and the collar is ensured in the winding process of the stator windings.
  • the coil holder can be produced as a molded part, preferably in one piece, from thermoplastic or thermosetting plastic, for example by an injection molding process.
  • a one-piece coil holder has the advantage that it can be attached to the stator in a single assembly step.
  • the coil holder is the same design for all winding heads of the stator. This has the advantage that only a single component has to be manufactured and stored, which has a favorable effect on the production costs for the electric motor.
  • the coil holder according to the invention is used in electric motors for household appliances, especially in universal motors or series motors, such as drive motors for washing machines or dryers or pump drives for washing machines or dishwashers or blower motors for vacuum cleaners.
  • FIG. 2 shows an end face of the stator according to FIG. 1, FIG.
  • FIG. 3 shows the bobbin holder according to FIG. 1 obliquely from above
  • FIG. 4 shows a side view of the bobbin holder according to FIG. 1,
  • FIG. 5 shows the bobbin holder according to FIG. 3 or FIG. 4 obliquely from below, FIG.
  • Fig. 6 shows obliquely from above a section of the stator according to Figure 1 with a further embodiment of the coil holder according to the invention.
  • a stator 1 of a universal motor is shown schematically obliquely from above.
  • the stator 1 is formed, for example, as a laminated stator core and bounded by an A-side stator end face 11 and a B-side stator end face 12, which are of identical design.
  • FIG. 2 shows the A-side stator end face 11.
  • the stator 1 has two distinct stator poles 2 for accommodating stator windings 3.
  • the stator windings 3 in the form of a first pole coil 31 are formed by a first stator pole
  • stator pole 21 and the stator windings 3 in the form of a second pole coil 32 are received by a second stator pole 22 opposite the first stator pole 21.
  • Each of the stator poles 2 has the same structure and has a pole neck 4 which ends in a pole piece 5. That the first stator pole 21 has a first pole neck 41 which terminates in a first pole core 51 and the second stator pole 22 has a second pole neck 42 which terminates in a second pole core 52.
  • a rotor space R is limited, in which a rotor (not shown) of the universal motor can be arranged rotatably about its rotor axis A.
  • the first pole coil 31 is received by winding grooves 611, 612 of the first stator pole 21 formed by the first pole neck 41 and the first pole horn 51.
  • the second pole coil 32 is formed by winding grooves 621, 622 of the second stator pole formed by the second pole neck 42 and the second pole horn 52
  • insulating moldings 7 are inserted in the axial direction into the winding grooves 611, 612, 621, 622 of the stator 1.
  • the portion of the stator windings 3, which protrude beyond the A-side Statorstirn Chemistry 11 and the B-side Statorstirn Chemistry 12 form the winding heads 8.
  • the four coil holder 9 are arranged on the stator end faces 11 and 12 respectively.
  • the A-side end winding 81A of the first field coil 31 is supported by the A-side coil holder 91A and the A-side end winding 82A of the second pole coil 32 through the A-side coil holder 92A (not shown)
  • the B-side end winding 81 B of the first pole coil 31 is held by the B-side coil holder 91 B
  • the B-side end winding 82 B of the second pole coil 32 is supported by the B-side coil holder 92B.
  • the coil holders 91 A, 91 B, 92 A and 92 B are identical and are explained in more detail in Figures 3, 4 and 5.
  • connection terminal 10 for receiving an external motor connector plug is arranged on the B-side Statorstirn
  • the windings of the first pole coil 31 and the second pole coil 32 are connected to the connection terminal 10.
  • terminals for further electrical motor components are provided on the connection terminal 10, such as for example a thermal switch 13 in the armature circuit, which is arranged between the first stator pole 21 and the second stator pole 22 in the air gap between the stator 1 and the rotor (not shown).
  • the thermal switch 13 is connected to one of the terminal lugs of the connection terminal 10 via a first connection line 131, which terminates at its end facing away from the thermal switch 13 in a flat connector sleeve.
  • the thermal switch 13 has a second connecting line 132 which terminates at its end remote from the thermal switch 13 in a second flat plug sleeve.
  • the second flat plug sleeve is provided for electrically contacting a carbon brush of the armature circuit.
  • the coil holder 9 is shown from different directions.
  • the coil holder 9 has a base plate 14, on which in the region of the pole piece 5, a ring-segment-shaped wall 15 is formed, which extends axially away from the stator 1 with respect to the rotor axis A to the outside.
  • the curvature of the ring-segment-shaped wall 15 is adapted to the curvature of the pole horns 5.
  • the coil holder 9 is located in the on Stator 1 mounted state (see Figure 1) with its base plate 14 in the region of one of the stator poles 2 on the respective Statorstirnsynthesis 11 and 12, wherein the annular segment-shaped wall 15 rests against the rotor chamber R facing inner edge of the respective pole core 5.
  • the position of the stator windings 3 of the respective winding head 8 in the radial direction with respect to the rotor axis A is determined by the ring-segment-shaped wall 15. That is, by the ring-segment-shaped wall 15 is avoided that individual stator windings 3 of the winding head 8 protrude into the rotor space R.
  • the base plate 14 has a length L which extends from the inner edge of the pole piece 5 to the associated outer edge of the stator 1. In the circumferential direction U, the base plate 14 has a width B which is smaller than the width of the pole neck 4. Thus, the base plate 14 covers only a portion of the stator 2 within the pole neck 4th
  • Mounting pin 16 formed for receiving in a recess 17 of the stator 1.
  • Mounting pin 16 has a cross-shaped cross-section. Is the recess 17 of
  • Stators 1 formed according to a cross-shaped, so the coil holder 9 is in his
  • a respective recess 17 of the stator 1 is provided, wherein the recess 17 is arranged in each case centrally to the pole neck 4 and centrally to the inner and the outer edge of the stator 1. Furthermore, on the underside 14U of the base plate 14, two angle-shaped anti-rotation locks 18 are formed, with which the coil holder 9 on the
  • two supports 20 for the winding head 8 are formed on each of the two adjoining edges of the base plate 14 adjoining the ring-segment-shaped wall 15.
  • the winding head 8 is held at a distance from the base plate 14.
  • an opening 150 is formed in the region between the two supports 20.
  • a collar 30 extending from the pole piece 5 in the direction of the outer edge of the stator 1 is integrally formed on its edge opposite the base plate 14.
  • the coil holder 9 is U-shaped, wherein the base plate 14 and the collar 30 each form one of the legs of the U, which are interconnected by the ring-segment-shaped wall 15.
  • This collar 30 serves to uniquely define the winding head 8 in the axial direction.
  • the collar 30 has an opening 300, which is adapted in shape to a mounting punch (not shown), whereby the orientation of the coil holder 9 is uniquely determined to the mounting temple for mounting on the respective stator 2.
  • two guide elements 40 for connecting lines or connection lines of electronic components of the electric motor are subsequently formed on the supports 20 for the winding head 8.
  • These guide elements 40 serve, for example, as a holder for the second connecting line 132 of the thermal switch 13.
  • These guide elements 40 are in the form of a labyrinth, through which, for example, the second connecting line 132 of the thermal switch 13 is clamped.
  • an angle ⁇ is included, which is preferably less than 90 degrees.
  • an angle ß is included, which is preferably greater than 90 degrees.
  • the collar 30 is arranged parallel to the base plate 14, so that the stator windings 3 of the winding head 8 easily in the defined by the base plate 14 and the collar 30
  • FIG. 6 shows a section of the stator 1 with a further embodiment of the coil holder 9 obliquely from above.
  • the opening 150 in the ring segment-shaped Wall 15 extends in the axial direction from a parallel to the stator end surface 12 extending upper edge 151 to Statorstirn Chemistry 12.
  • the base plate 14 of the coil holder 9 does not extend in this embodiment up to the rotor chamber R facing inner edge of the pole piece 52, but is in radial Direction from this inner edge set back.
  • the opening 150 is bounded laterally by two side walls 153, 154.
  • the two side walls 153, 154 are each in a convex arc from the rotor chamber R side facing the ring segment-shaped wall 15 to the rotor chamber R facing end face 152 of the base plate 14.
  • the distance between the two side walls 153, 154 decreases in the radial direction on the outside, so that the two side walls 153, 154 run towards each other like a funnel.
  • the side walls 153, 154 simultaneously form end walls of the supports 20th

Landscapes

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

Abstract

L'invention concerne un support de bobine (9, 91A, 91b; 92A, 92B) servant à fixer une tête d'enroulement (8, 81A, 81B, 82A, 82B) d'enroulements statoriques (3, 31, 32) sur un stator (1) d'un moteur électrique à pôles statoriques saillants (2, 21, 22). Chaque pôle statorique (2, 21, 22) se termine dans une corne polaire (5, 51, 52) et le support de bobine (9, 91A, 91b; 92A, 92B) présente une paroi (15) s'étendant, dans la zone de la corne polaire (5, 51, 52), de la surface frontale de stator (11, 12) axialement vers l'extérieur et ayant en particulier la forme d'un segment annulaire. La paroi (15) est moulée sur une plaque de base (14) qui repose sur la surface frontale de stator (11, 12) et recouvre uniquement un segment de la surface frontale de stator (11, 12) dans la zone du pôle statorique (2, 21, 22), la plaque de base (14) étant conçue pour la fixation du support de bobine (9, 91A, 91b; 92A, 92B) sur le stator (1).
EP08804268A 2007-09-25 2008-09-16 Support de bobine pour fixer les têtes d'enroulements statoriques d'un moteur électrique Withdrawn EP2191557A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007045747 2007-09-25
PCT/EP2008/062310 WO2009040272A2 (fr) 2007-09-25 2008-09-16 Support de bobine pour fixer les têtes d'enroulements statoriques d'un moteur électrique

Publications (1)

Publication Number Publication Date
EP2191557A2 true EP2191557A2 (fr) 2010-06-02

Family

ID=40375375

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08804268A Withdrawn EP2191557A2 (fr) 2007-09-25 2008-09-16 Support de bobine pour fixer les têtes d'enroulements statoriques d'un moteur électrique

Country Status (3)

Country Link
EP (1) EP2191557A2 (fr)
CN (1) CN101803149A (fr)
WO (1) WO2009040272A2 (fr)

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US9270144B2 (en) 2011-09-26 2016-02-23 William R. Benner, Jr. High torque low inductance rotary actuator
US10284038B1 (en) 2011-09-26 2019-05-07 Pangolin Laser Systems, Inc. Electromechanical limited rotation rotary actuator and method employing segmented coils
US10734857B2 (en) 2011-09-26 2020-08-04 Pangolin Laser Systems, Inc. Electromechanical limited rotation rotary actuator and method employing segmented coils
US8963396B2 (en) 2011-09-26 2015-02-24 Pangolin Laser Systems, Inc. Electromechanical device and assembly method
DE102015212000A1 (de) * 2015-06-29 2016-12-29 Robert Bosch Gmbh Elektromotor
CN106849447B (zh) * 2017-03-29 2023-03-24 福建永强力加动力设备有限公司 发电电焊一体机转子线壳
DE102018212164A1 (de) * 2018-07-20 2020-01-23 BSH Hausgeräte GmbH Küchengerät und Vorrichtung zum Zusammenhalten eines Schlauchs in einem Aufbewahrungszustand
WO2024176546A1 (fr) * 2023-02-24 2024-08-29 パナソニックＩｐマネジメント株式会社 Moteur électrique, compresseur et dispositif

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JPH0787677B2 (ja) * 1987-07-08 1995-09-20 松下電器産業株式会社 界磁組立体
US5029379A (en) * 1988-10-17 1991-07-09 Ryobi Motor Products Corp. Method of making a motor field winding with intermediate tap
DE19622186A1 (de) * 1996-06-03 1997-12-04 Hilti Ag Elektromotor
DE202006007808U1 (de) * 2005-12-16 2006-08-10 BSH Bosch und Siemens Hausgeräte GmbH Statorendscheibe für einen Kommutatormotor und Kommutatormotor

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Also Published As

Publication number Publication date
WO2009040272A2 (fr) 2009-04-02
CN101803149A (zh) 2010-08-11
WO2009040272A3 (fr) 2009-05-14

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