WO2008019945A1 - Rotor avec ventilateur intégré - Google Patents

Rotor avec ventilateur intégré Download PDF

Info

Publication number
WO2008019945A1
WO2008019945A1 PCT/EP2007/057962 EP2007057962W WO2008019945A1 WO 2008019945 A1 WO2008019945 A1 WO 2008019945A1 EP 2007057962 W EP2007057962 W EP 2007057962W WO 2008019945 A1 WO2008019945 A1 WO 2008019945A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
arms
electric motor
motor according
cage
Prior art date
Application number
PCT/EP2007/057962
Other languages
German (de)
English (en)
Inventor
Volker Schmitz
Helmut SCHÖNHOFF
Dirk Schmidt
Original Assignee
Vorwerk & Co. Interholding 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 Vorwerk & Co. Interholding Gmbh filed Critical Vorwerk & Co. Interholding Gmbh
Publication of WO2008019945A1 publication Critical patent/WO2008019945A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • 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
    • H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
    • 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
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H02K3/487—Slot-closing devices

Definitions

  • the invention relates to an electric motor with a rotor, which has a rotor winding, which rests in circumferentially uniformly distributed grooves of the rotor, wherein further provided with a rotor fan is provided, forming by means of extending into the grooves arms, forming a cage held the runner.
  • an arm with bias radially outward in the groove rests, according to which the free-keeping of the ventilation path between arm and winding is secured.
  • the arm inserted with prestress in the groove is always urged radially outward, in particular into a radial contact position in which the arm urges against a, the arm-receiving groove radially outwardly partially overlapping strip-like projection.
  • the invention further relates to an electric motor according to the features of the preamble of claim 1.
  • an arm rests with bias radially outward in the groove. Accordingly, a self-holding of the arm having cage is achieved with fan on the rotor. Due to the bias of the cage arm is located on a radially outer edge, which engages in the groove on. The resulting frictional force is sufficiently large so that the rotor can be transported to the next production step after it has been fitted with the cage without further securing measures.
  • the bias of the arm further ensures that this does not protrude radially inward into the groove of the rotor, so preferably not contacted the covered windings in the groove.
  • a ventilation path between arm and winding is preferably left, through which there is a suction or blowing air through the fan during operation.
  • the winding is desired to be contacted by the arm, it can be biased radially outward in the groove.
  • the bias of the arm is achieved by a non-mounted cage at an acute angle to an axis of symmetry of the cage directed course of the arm or the arms.
  • the cage is further preferably produced as a plastic injection molded part. Its arms take after completion of the cage, ie after the injection process a radially outwardly facing angular position, so on, starting from the fan wheel, considering the circumferentially distributed around the fan wheel arranged arms, including a funnel-like opening space. If the cage mounted on the rotor, this by inserting the cage arms in the rotor grooves, these arms are bent in the context of their elasticity radially inward, after which they rest due to the spring force surface on the facing radial inner edge of the grooves.
  • the acute angle enclosed by the arms in the non-assembled state of the cage relative to the axis of symmetry thereof is preferably 1 ° to 5 °, such as 2 or 3 ° or 4 ° or else tenth-degree intermediate dimensions such as 2.3 ° or 3, for example. 7 °.
  • the arms are rooted in a ring which surrounds the rotor, on which ring on other side predominantly radially extending guide vanes are formed. These vanes are preferably not strictly radially aligned, but rather take in plan a curved blade shape, to obtain a targeted flow direction.
  • the inner diameter of the arm supporting ring is preferably adapted to the outer diameter of the winding.
  • the ring continues in a projecting radially outward beyond the arms out flange portion whose dimension corresponds in the radial direction of the radial extent of the blades.
  • the radial projection of the flange portion over the arms is about 1 to 5 times, preferably 2 to 3 times the thickness of the arms measured in the radial direction.
  • the flange section leaves radially inward ventilation paths, for flowing through the grooves-ventilation paths.
  • These flange-section-side ventilation paths are furthermore preferably left by blades projecting radially inwards beyond the inner peripheral edge of the rim.
  • the ratio of the number of blades to the number of arms is greater than 0.5, so more preferably also less than 2.0.
  • circumferentially evenly distributed over the ring are twelve arms provided, while these are arranged opposite to the ring twenty-one, in any case evenly distributed arranged blades.
  • Figure 1 is a perspective view of a rotor provided with a cage of an electric motor in a perspective view.
  • FIG. 2 shows the rotor of FIG. 1 in a further perspective
  • FIG 3 shows the longitudinal section through the rotor with mounted cage.
  • FIG. 5 shows the enlargement of the region V in FIG. 3;
  • Fig. 7 shows the cage in longitudinal section.
  • a rotor 1 for an electric motor with a rotor core 2. It has over the circumference evenly distributed a plurality of extending in the axial direction of the rotor 1 grooves 3, which radially outward are open. Between two circumferentially adjacent grooves 3, viewed in cross-section, there extends a web 4 which separates them and is approximately T-shaped in cross-section, wherein the web flanks 5 of two circumferential grooves extend toward each other. ßig adjacent rotor bars 4 limit the slot-like slot opening 6. The T-leg of the web 4 is radially aligned.
  • the web flanks 6 of two circumferentially adjacent rotor webs 4 protrude freely, like a roof over the associated groove 3, which groove 3 tapers on the underside starting from these web flanks 5 in cross section in the direction of a groove bottom.
  • grooves 3 are uniformly spaced from each other over the circumference twelve such grooves 3 are provided which extend in the axial direction over the entire length of the rotor core 2. These grooves 3 are used to receive winding wires, for forming a rotor winding 7, to which further the grooves 3 are lined for insulation to the winding wires of the rotor winding 7 with an insulating layer 8.
  • Each groove 3 of the rotor 1 is closed in the operable state of the rotor 1 radially outwardly by a cover insulation. This is formed by pin-like arms 9, which extend over the entire axial length of the grooves 3 extending into this. Each groove 3 is associated with such an arm 9.
  • Each arm 9 is designed approximately T-shaped in cross-section, with a in the space between two the respective groove 3 partially overlapping, facing each other web flanks 5 T-leg 10th Die T-webs 11 of the arms 9 extend on the nut side, ie the lower side of the ingot flanks 5 growing in the groove 3 are supported on the underside against this, wherein a further space is left between the winding wires of the rotor winding 7 and the T-webs 11 of the arm 9, to form a groove extension direction, ie correspondingly parallel aligned with the rotor axis x extending ventilation path 12.
  • the cross-sectional areas of rotor winding 7 and vent 12 within the overlapped groove cross-section are approximately 1.2: 1 in a ratio of about 2: 1 to 1.1: 1 / in a selected embodiment.
  • the rotor winding 7 occupies an area of 14 mm 2 and the resulting ventilation path 12 occupies an area of 12 mm 2 .
  • the arms 9 enter at one end into a ring 13 connecting the arms 9.
  • This ring 13 is provided with an inner diameter which corresponds to the clear distance between two diametrically opposite arms 9 in the root region of the ring 13.
  • the ventilation path 12 upwardly bounding T-web surfaces of the arms 9 in the circumferential inner peripheral edge of the ring 13 a.
  • the ring 13 expands radially outward into a flange section 14, which extends correspondingly circumferentially beyond the arms 9.
  • the radial protrusion dimension of the flange portion 14 via the arms 9 corresponds approximately to the extent of the radial material thickness of the arm 9 in the region of the T-leg 10.
  • the ring 13 or flange section 14 connecting the arms 9 extends in the axial direction outside of the grooves 3, further supporting itself on an associated end face of the rotor core 2 and surrounding the rotor winding 7.
  • the ring 13 and flange 14 is arranged in the illustrated embodiment collector side of the rotor 1.
  • the flange portion 14 carries on the arms 9 facing away transversely to the rotor axis x aligned flange or annular surface vanes 15 to form a collector side provided fan 16.
  • the blades 15 extend essentially in the radial direction, wherein evenly distributed over the circumference in the illustrated embodiment, twenty-one such blades 15 form the fan 16.
  • the height of the blades 15 measured in axial extent of the same in the representations corresponds to about one-fifth to one-sixth of the axial length of an arm 9.
  • the axial length of an arm 9 corresponds to about four times the blade height.
  • the blades 15 in a plan view are not strictly linearly aligned with the base plane of the ring 13 extending transversely to the rotor axis x, but rather curved to form a radial fan.
  • a convex curvature of the blades 15 directed counterclockwise is provided.
  • the blades 15 are bent at the outer radius in the direction of travel.
  • the arms 9, the ring 13 and the flange portion 14 and the blades 15 are integrally molded as a plastic component, in particular as a plastic injection molded part, which forms a total of a cage 17.
  • This cage 17 is pushed after the winding of the rotor core 2 in the axial direction, with introduction of the arms 9 in the associated grooves.
  • the cage 17 is designed so that the arms 9 extend in the unloaded orientation, ie, when the cage 17 is not mounted starting from the connection to the ring 13 radially outwardly increasing in the axial direction, so that the arms 9 an acute angle alpha of about 3 ° to the axis of symmetry y of the cage 17, which axis of symmetry y coincides with the rotor axis x after assembly of the cage 17 on the rotor core 2.
  • the arms 9 are bent radially inwardly as part of their elasticity and inserted into the grooves 3 in this position.
  • the groove-ventilation paths 12 open into a radially inwardly on the flange 14 left circumferential ventilation path 18, which is defined inter alia by a radial supernatant of the blades 15 inwardly over the ring 13 and flange portion 14 addition, which radial projection of the blades 15 corresponds approximately to the thickness of a blade 15.
  • the decisive factor for the airflow generated by the fan rotation is the centrifugal force, which transports the air radially from the fan 16 to the outside. Due to the selected position of the air outlet openings to the fan 16 and the associated air turbulences are taken up and removed by the fan blades 15 leading in the direction of advance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne un moteur électrique avec un rotor (1) qui comporte un enroulement de rotor (7) qui est logé dans des rainures (3) du rotor (1) régulièrement réparties sur la périphérie, sachant qu'il est prévu en outre un ventilateur (16), relié au rotor (1), qui est maintenu sur le rotor (1) au moyen de bras (9), s'étendant dans les rainures (3) tout en formant une cage (17). Pour perfectionner un moteur électrique du genre en question, en particulier du point de vue d'un refroidissement amélioré de ce dernier, on propose selon l'invention qu'un bras (9) du ventilateur (16) laisse par rapport à l'enroulement (7) une voie de refroidissement de rainure (12) qui permet, en service, une aspiration ou un soufflage traversant d'air au moyen du ventilateur (16).
PCT/EP2007/057962 2006-08-18 2007-08-01 Rotor avec ventilateur intégré WO2008019945A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610038909 DE102006038909A1 (de) 2006-08-18 2006-08-18 Elektromotor mit Läufer
DE102006038909.3 2006-08-18

Publications (1)

Publication Number Publication Date
WO2008019945A1 true WO2008019945A1 (fr) 2008-02-21

Family

ID=38610866

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/057962 WO2008019945A1 (fr) 2006-08-18 2007-08-01 Rotor avec ventilateur intégré

Country Status (3)

Country Link
DE (1) DE102006038909A1 (fr)
TW (1) TW200822499A (fr)
WO (1) WO2008019945A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111431318A (zh) * 2015-08-03 2020-07-17 Lg伊诺特有限公司 电机
EP4024668A1 (fr) * 2021-01-04 2022-07-06 Hamilton Sundstrand Corporation Rotor comprenant des cales et un support axial des extrémités de bobinage avec distribution de refroidissement intégrée

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008059171B4 (de) * 2008-11-24 2014-08-28 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Antriebsmotor mit integrierter Kühlung
DE102009016024A1 (de) * 2009-04-02 2010-10-07 Metabowerke Gmbh Anker für einen durchzugsbelüfteten Elektromotor
DE102010042175A1 (de) * 2010-10-07 2012-04-26 BSH Bosch und Siemens Hausgeräte GmbH Elektrische Maschine mit Nutkeilen
FR2988237B1 (fr) * 2012-03-16 2014-03-07 Valeo Equip Electr Moteur Ensemble de flasques de rotor de machine electrique tournante munis de pions de centrage et d'evacuation de la chaleur favorisant le refroidissement du rotor et rotor de machine tournante associe
KR102318229B1 (ko) 2014-12-10 2021-10-27 엘지이노텍 주식회사 로터 조립체 및 이를 포함하는 모터
FR3138586A1 (fr) * 2022-07-28 2024-02-02 Valeo Equipements Electriques Moteur Stator pour une machine électrique tournante

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7028025U (de) * 1970-07-25 1971-01-14 Siemens Ag Elektromotor mit bewickeltem laeufer.
US4409502A (en) * 1981-12-17 1983-10-11 Westinghouse Electric Corp. Self-cooled electrical machine with integrated fan and salient pole rotor
EP0649211A2 (fr) * 1993-10-14 1995-04-19 Matsushita Electric Industrial Co., Ltd. Machine à induction et méthode de fabrication d'un rotor de la machine à induction
DE19929590A1 (de) * 1999-06-29 2001-01-04 Scintilla Ag Elektrische Handwerkzeugmaschine
GB2385715A (en) * 2002-02-07 2003-08-27 Johnson Electric Sa Double Bladed Fan

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7028025U (de) * 1970-07-25 1971-01-14 Siemens Ag Elektromotor mit bewickeltem laeufer.
US4409502A (en) * 1981-12-17 1983-10-11 Westinghouse Electric Corp. Self-cooled electrical machine with integrated fan and salient pole rotor
EP0649211A2 (fr) * 1993-10-14 1995-04-19 Matsushita Electric Industrial Co., Ltd. Machine à induction et méthode de fabrication d'un rotor de la machine à induction
DE19929590A1 (de) * 1999-06-29 2001-01-04 Scintilla Ag Elektrische Handwerkzeugmaschine
GB2385715A (en) * 2002-02-07 2003-08-27 Johnson Electric Sa Double Bladed Fan

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111431318A (zh) * 2015-08-03 2020-07-17 Lg伊诺特有限公司 电机
CN111431318B (zh) * 2015-08-03 2023-04-11 Lg伊诺特有限公司 电机
EP4024668A1 (fr) * 2021-01-04 2022-07-06 Hamilton Sundstrand Corporation Rotor comprenant des cales et un support axial des extrémités de bobinage avec distribution de refroidissement intégrée
US11569703B2 (en) 2021-01-04 2023-01-31 Hamilton Sundstrand Corporation Integrated wedge cooling distribution plate and end turn support

Also Published As

Publication number Publication date
DE102006038909A1 (de) 2008-02-21
TW200822499A (en) 2008-05-16

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