WO2017125371A1 - Paquet de tôles de rotor pour une machine électrique - Google Patents

Paquet de tôles de rotor pour une machine électrique Download PDF

Info

Publication number
WO2017125371A1
WO2017125371A1 PCT/EP2017/050857 EP2017050857W WO2017125371A1 WO 2017125371 A1 WO2017125371 A1 WO 2017125371A1 EP 2017050857 W EP2017050857 W EP 2017050857W WO 2017125371 A1 WO2017125371 A1 WO 2017125371A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheets
offset
openings
winding grooves
rotor
Prior art date
Application number
PCT/EP2017/050857
Other languages
German (de)
English (en)
Inventor
David Charles
Holger Fröhlich
Original Assignee
Continental Automotive 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 Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2017125371A1 publication Critical patent/WO2017125371A1/fr

Links

Classifications

    • 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
    • H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with 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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • 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
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/26—Rotor cores with slots for windings
    • H02K1/265—Shape, form or location of the slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2209/00—Specific aspects not provided for in the other groups of this subclass relating to systems for cooling or ventilating

Definitions

  • Rotor sheet package for an electric machine The invention relates to a rotor core for an electric machine, in particular an air-cooled electric machine. Furthermore, the invention relates to a method for producing a rotor laminated core mentioned above.
  • a performance limiting factor is the quality of dissipated heat dissipation.
  • an utilization of active material used may not be optimal.
  • Special zones, in which a dissipation of heat within an electrical machine can be problematic are in particular stator winding heads and a rotor of the electric machine.
  • Rotors for electrical machines are usually constructed from a rotor core, which is composed of individual stacked in the longitudinal ⁇ direction of the rotor plates. The individual sheets of the rotor laminated core are usually stacked congruent in the axial direction.
  • the rotor core of the invention for an electrical machine comprises a plurality of sheets stacked in a stacking direction.
  • the sheets each have a plurality of annularly arranged
  • the sheets each comprise a plurality of annularly arranged winding grooves.
  • Breakthroughs offset in the stacking direction sheets are arranged offset in a circumferential direction of the sheets to each other such that at the same winding grooves a plurality of extending through the rotor core, helical spindle-shaped cooling channels are formed.
  • the winding grooves of sheets offset in the stacking direction are offset in the circumferential direction of the sheets by at least one groove jump.
  • the winding grooves and the apertures are arranged equidistant from each other, and the slope of the cooling channels is dependent on the number of groove jumps around which the apertures in the circumferential direction of the sheets are offset from each other, a pitch of the openings T D and a pitch of the winding grooves T w ,
  • the stacking direction extends in particular in a longitudinal direction of the rotor.
  • the sheets are each individual Sheets, in particular congruent sheets, which have identical surfaces.
  • all the laminations of the rotor laminations are identical in construction, that is to say they are identical components.
  • the sheets are also preferably substantially annular, so that the rotor laminated core is in particular ⁇ special of a substantially hollow cylindrical shape.
  • the sheets each comprise a plurality of annularly arranged recesses which form the winding grooves of the individual sheets or the laminated core.
  • the winding grooves are arranged equidistant from one another and along an outer circumference of the metal sheets.
  • Each sheet of the rotor lamination stack comprises a plurality of apertures which can be arranged between the outer circumference of the sheet, in particular between the winding grooves arranged there, and a central bore of the sheet for supporting the sheet on a rotor shaft.
  • the winding grooves of staggered sheets in the stacking direction are arranged offset in the same direction winding grooves in a circumferential direction of the sheets to each other.
  • congruent is meant in this context that the imaginary circular rings, along which the winding grooves are arranged, each congruent from one sheet to an immediately adjacent sheet in the stacking direction one above the other.
  • the winding grooves of sheets offset in the stacking direction are twisted or arranged in relation to one another in such a way that a plurality of helical spindle-shaped cooling channels are formed as a whole, the design of the cooling channels based on the principle of the Archimedean screw.
  • the openings are arranged equidistant from each other, whereby parallel cooling channels can be formed, which allow a particularly uniform heat dissipation from the rotor core.
  • the sheet Between adjacent breakthroughs, the sheet each forms a spoke.
  • the resulting spoke design according to this embodiment enables a high rotor rigidity and a high torque transmission.
  • the winding grooves of offset in the stacking direction sheets are offset in the circumferential direction of the sheets by at least one groove jump.
  • a groove jump here is the circumferential distance or the angular distance between two adjacent winding grooves to each other.
  • pitch per sheet SB The pitch of the cooling channels, in particular the pitch of a metal sheet to a staggered immediately adjacent in the stacking direction, arranged sheet metal (hereinafter: pitch per sheet SB), is dependent on the number x of the groove jumps around which the n
  • Breakthroughs in the circumferential direction of the sheets are arranged offset from one another, a pitch of the openings T D and a pitch of the winding grooves T w .
  • the division of the breakthroughs T D results from the full
  • the angular distance S B p, which cover the cooling channels within the laminated core, resulting from the slope per sheet S B multiplied by the number N of sheets of the laminated core, that is S BP S B * N.
  • gaseous cooling medium are passed, for example, a cooling air flow, wherein the cooling medium can be sucked from the environment of the rotor or the electric machine and released after flowing through the cooling channels back to the environment.
  • the rotor laminated core with its helical spiral cooling channels is also adapted to a cooling medium such as, for example, oil (in particular high-viscosity oil or a gear oil) To promote oil foam or general aerosols through the cooling channels. Under certain conditions, a low-noise operation of the rotor or the electric machine is possible even at high bubble content.
  • a cooling medium such as, for example, oil (in particular high-viscosity oil or a gear oil)
  • the helical spindle-shaped cooling channels also rotate within the rotor laminated core.
  • cooling medium can be conveyed through the cooling channels according to the principle of a screw pump, wherein the cooling channels serve as chambers of the screw pump for conveying cooling medium.
  • the outer contour of the cooling channels is determined by the shape or the contour of the openings in the individual sheets. A possible flow can hereby be influenced in particular by the rotational speed of the rotor laminated core, the inner and outer diameters and in particular ⁇ sondere over the slope of the cooling channels as well as the friction of the cooling medium on the inner walls of the cooling channels.
  • the rotor laminated core according to the invention enables a delivery of cooling medium and thereby a particularly intensive axial passage of cooling medium through the rotor laminated core and in particular ⁇ special an active cooling by a removal of thermally laden air.
  • Cooling channel provides a particularly largeberichtbergertra ⁇ supply surface, whereby an improved fürkarsbel structuredete heat dissipation and cooling, in particular of the rotor is made possible.
  • the winding grooves of offset in the stacking direction sheets from a sheet to an immediately adjacent sheet in the circumferential direction of the sheets are offset from one another.
  • a cooling channel be formed with a particularly small pitch angle.
  • a volume flow of coolant conducted through the at least one cooling channel can flow past a particularly large surface of the cooling channel and thereby absorb a particularly large amount of heat from the rotor.
  • a fan impeller is arranged on ⁇ .
  • the fan impeller can be molded onto a short-circuit ring.
  • “Integrally formed” is understood to mean in this context, in particular, are integrally connected to each other that the fan impeller is integrated into a short-circuit ring of the rotor, that is, the short-circuit ring and the fan impeller. This allows a reduction in weight of the rotor and a ge ⁇ ringeren production expense.
  • the air-cooled electric machine according to the invention comprises an above-described rotor core packet according to the invention.
  • the inventive method for producing a Ro ⁇ torblechpers for an electrical machine comprises providing a plurality of sheets. Several openings are punched in each of the sheets, so that the openings are annular and preferably arranged equidistant from each other. Furthermore, a plurality of winding grooves are punched in each of the sheets, so that the winding grooves are arranged annularly and preferably equidistant from each other.
  • the sheets are twisted to each other and stacked congruently.
  • the sheets are in particular congruent sheets, each with several uniform breakthroughs.
  • the twisting or staggered arrangement in the circumferential direction takes place about at least one groove of the rotor winding or at least one groove jump.
  • the intended slope per sheet S B , a length of the laminated core and / or the provided angular distance S B p angular distance can be calculated or determined in advance and in particular the parameters division of the winding grooves T w , pitch of the openings T D , plate thickness of the individual sheets and their number be adjusted accordingly.
  • FIG. 1 is a perspective view of a rotor comprising a rotor core with a plurality of screw-shaped cooling channels and a fan impeller,
  • FIG. 2 is a plan view of a single sheet of Ro ⁇ torblechpers of FIG. 1
  • 3 is a perspective view of a plurality of stacked sheets of the rotor laminated core of FIG. 1 with illustrated formation of the cooling channels
  • FIG. 4 is a partial longitudinal section through the rotor core of FIG. 1
  • FIG. 5b in each case a perspective view of a sheet metal 6b, 7b of the rotor laminated core according to FIGS. 6a, 7a and 8a with and 8b of a course of a cooling duct and FIG
  • Fig. 5c in each case a perspective view of a plurality of sheets 6c, 7c of the rotor laminated core according to Fig. 6a, 7a and 8a.
  • Fig. 8c shows a rotor 1 of an air-cooled electric machine (not shown).
  • the rotor 1 comprises a rotor laminated core 2 and an impeller 3 with blades 4 shown on the left in FIG. 1.
  • the rotor core 2 comprises a plurality of identical laminations 7 stacked one above the other in the longitudinal direction L of the rotor 1, wherein the laminations 7 each have seven apertures 8 and Openings 8 of all stacked sheets 7 a total of seven by the rotor laminated core 2 ver ⁇ running, screw-shaped cooling channels 9 form.
  • Each of the seven punched apertures 8 of the plate 7 connects mutually opposite end faces S of the sheet 7 with each other and forms a portion of the seven mutually parallel, helical spindle-shaped Cooling channels 9, which arise from the fact that the individual sheets 7 are congruently stacked in the longitudinal direction L of the rotor 1 to the rotor core 2, each individual sheet
  • the openings 8 are each on an imaginary inner annulus
  • the plate 7 forms a spoke 5 in each case. Further, the plate 7 has a plurality of radially outwardly extending, identical winding grooves 11 which are arranged equidistantly on an imaginary outer annulus 10.2 and distributed along an outer periphery 12 of the sheet 7 by a respective groove jump 13.
  • the groove jump 13 here is the circumferential distance or the angular distance between two adjacent winding grooves 11 to each other.
  • the sheets 7 are stacked in such a twisted relation to one another that the winding grooves 11 or the perforations 8 of sheets 7 offset in the stacking direction L (illustrated by way of example in FIG. 4 by the reference numerals "8a” and “8b” designated breakthroughs) in a circumferential direction U of the sheets 7 from a sheet to an immediately adjacent sheet (exemplified in Fig. 4 illustrated by the reference numerals "7a” and "7b” designated sheets) are offset from each other.
  • the winding grooves 11 or the openings of the sheets stacked in the stacking direction L are arranged offset in the circumferential direction U of the sheets 7 by one groove jump 13 in each case. This results in a relatively small pitch angle of the cooling channel 9.
  • the groove jump 13 represents the angular distance of two adjacent winding grooves 11. The openings 8 thereby form helical spindle-shaped cooling channels
  • cooling channels 9 wherein the course of one of these cooling channels 9 in the form of an Archimedean screw in Fig. 3 for clarity partially is shown without associated sheets 7.
  • the cooling channels 9 are parallel to each other.
  • Fig. 5a shows a rotor core 2, which has been stacked from sheets 7 of FIG.
  • the plates 7 have a total of 56 equidistant to each other on the outer annulus 10.2 arranged winding grooves 11.
  • the seven openings 8 are also arranged equidistant from each other on the inner annulus 10.1.
  • Fig. 5b shows an example of the course of a cooling channel 9 of the seven identical and parallel to each other
  • pitch per sheet S B The pitch of the cooling channels 9 from a sheet metal to an immediately adjacent in the stacking direction L sheet is dependent on the number x of the groove jumps 13, by which the Wicklungsnuten or the openings in the circumferential direction of Plates 7 are offset from one another, a pitch of the openings T D and a pitch of the winding grooves T w .
  • the pitch of the apertures T D results from the full circumference (360 °) of the inner annulus 10.1, on which the apertures are arranged, divided by the number of equidistant apertures 8.
  • the pitch of the winding grooves T w is given by the full circumference (360 °) of the outer annulus 10.2 on which the winding grooves 11 are located, divided by the number of equidistantly distributed winding slots 11.
  • the pitch per sheet S B results from the formula S B 1 DX * T w and is for a groove jump or seven groove jumps 6, 429 °.
  • the laminated core shown by Fig. 5a comprises 100 sheets 7, each with a plate thickness of 0.5 mm. This results in a length of the laminated core 2 of 50 mm.
  • the angular distance S BP which the cooling channels 9 - as shown by Fig. 5b - within the
  • S BP S B * N and is 642, 9 °.
  • Sheet metal packages 2 are similar to the laminated core according to FIGS. 5 a to 5 c, in particular they have the same pitch of the winding grooves T w (6, 429 °) and the same length of the laminated core (50 mm of 100 identical metal sheets 7 with a sheet thickness of 0 in each case , 5 mm).
  • the laminated cores 2 shown by FIGS. 6a to 6c, 7a to 7c and 8a to 8c differ from the laminated core 2 shown by FIGS. 5a to 5c, however, with respect to the number of equidistant apertures 8 and the number x of groove jumps the openings 8 of staggered in the stacking direction L sheets 7 in the circumferential direction U of the sheets 7 are offset from one another.
  • openings are arranged in a circular ring. This results in a division of the openings T D of 36 ° (360 ° / 10).
  • the angular distance S BP which the cooling channels 9 - as shown by Fig.
  • openings are arranged in an annular shape. This results in a division of the openings T D of 32.727 ° (360 ° / ll).

Landscapes

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

Abstract

L'invention concerne un paquet de tôles de rotor (2) pour une machine électrique, le paquet de tôles de rotor (2) comportant plusieurs tôles (7) empilées dans une direction d'empilage. Les tôles (7) comprennent chacune plusieurs ajours (8) disposés en forme d'anneau circulaire, qui relient entre elles les faces frontales de chaque tôle (7), et les tôles (7) comportent chacune plusieurs gorges d'enroulement disposées en forme d'anneau circulaire. Les ajours (8) des tôles (7) décalées dans la direction d'empilage (L) sont disposés de manière décalée les uns par rapport aux autres dans une direction périphérique des tôles (7) de manière à former, pour des gorges d'enroulement se recouvrant, plusieurs canaux de refroidissement (9) de forme hélicoïdale traversant le paquet de tôles de rotor (2). Les gorges d'enroulement des tôles (7) décalées dans la direction d'empilement (L) sont disposées de manière décalée les unes par rapport aux autres dans la direction périphérique des tôles (7) d'au moins une longueur de recouvrement de gorge.
PCT/EP2017/050857 2016-01-19 2017-01-17 Paquet de tôles de rotor pour une machine électrique WO2017125371A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016200635.5A DE102016200635A1 (de) 2016-01-19 2016-01-19 Rotorblechpaket für eine elektrische Maschine
DE102016200635.5 2016-01-19

Publications (1)

Publication Number Publication Date
WO2017125371A1 true WO2017125371A1 (fr) 2017-07-27

Family

ID=57914942

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/050857 WO2017125371A1 (fr) 2016-01-19 2017-01-17 Paquet de tôles de rotor pour une machine électrique

Country Status (2)

Country Link
DE (1) DE102016200635A1 (fr)
WO (1) WO2017125371A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110535271A (zh) * 2019-10-11 2019-12-03 周伟华 一种转子铁芯
US20200321817A1 (en) * 2019-04-08 2020-10-08 Audi Ag Rotor for an electric machine
WO2022142974A1 (fr) * 2020-12-31 2022-07-07 广东美的制冷设备有限公司 Rotor de moteur et moteur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3522338A1 (fr) * 2018-01-31 2019-08-07 Siemens Aktiengesellschaft Rotor à canaux de refroidissement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1043887A (en) * 1905-12-06 1912-11-12 Gen Electric Dynamo-electric machine.
US1857023A (en) * 1929-09-04 1932-05-03 Ass Elect Ind Dynamo electric machine
US2630464A (en) * 1950-01-03 1953-03-03 Milton S Dunkelberger Electric motor
WO2005013459A1 (fr) * 2003-08-01 2005-02-10 Siemens Aktiengesellschaft Machine electrique a refroidissement de rotor et procede de refroidissement correspondant

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5859483A (en) * 1994-12-19 1999-01-12 General Electric Company Staggered cooling holes for enhanced heat transfer in air-cooled motors
US20120080983A1 (en) * 2010-10-05 2012-04-05 Trevor Iund Stator with cooling system and associated motor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1043887A (en) * 1905-12-06 1912-11-12 Gen Electric Dynamo-electric machine.
US1857023A (en) * 1929-09-04 1932-05-03 Ass Elect Ind Dynamo electric machine
US2630464A (en) * 1950-01-03 1953-03-03 Milton S Dunkelberger Electric motor
WO2005013459A1 (fr) * 2003-08-01 2005-02-10 Siemens Aktiengesellschaft Machine electrique a refroidissement de rotor et procede de refroidissement correspondant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200321817A1 (en) * 2019-04-08 2020-10-08 Audi Ag Rotor for an electric machine
US11637468B2 (en) * 2019-04-08 2023-04-25 Audi Ag Rotor for an electric machine
CN110535271A (zh) * 2019-10-11 2019-12-03 周伟华 一种转子铁芯
WO2022142974A1 (fr) * 2020-12-31 2022-07-07 广东美的制冷设备有限公司 Rotor de moteur et moteur

Also Published As

Publication number Publication date
DE102016200635A1 (de) 2017-07-20

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