EP1671411A1 - Stator pour machine electrique - Google Patents

Stator pour machine electrique

Info

Publication number
EP1671411A1
EP1671411A1 EP04787245A EP04787245A EP1671411A1 EP 1671411 A1 EP1671411 A1 EP 1671411A1 EP 04787245 A EP04787245 A EP 04787245A EP 04787245 A EP04787245 A EP 04787245A EP 1671411 A1 EP1671411 A1 EP 1671411A1
Authority
EP
European Patent Office
Prior art keywords
coil
strand
stand
stator
winding
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Withdrawn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
EP04787245A
Other languages
German (de)
English (en)
Inventor
Hubert Bischof
Frank Stambulic
Reinhard Meyer
Istvan Ragaly
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1671411A1 publication Critical patent/EP1671411A1/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Withdrawn legal-status Critical Current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
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core

Definitions

  • the invention relates to a stator for an electrical machine, in particular for a three-phase generator for motor vehicles with an annular stator core, which has a plurality of grooves arranged parallel to one another, in which strand windings are inserted.
  • Such three-phase generators are well known from the prior art. They are used in particular in motor vehicles as alternators. So-called claw-pole generators have established themselves as advantageous with regard to their size, manufacturing costs and robustness.
  • a claw pole generator usually comprises a rotor receiving the excitation winding and a ring-shaped stator surrounding the latter, which receives the three-phase windings.
  • a plurality of grooves are provided in the stand designed as a laminated core, which run parallel to one another and are evenly spaced apart. The windings for the three phases are now inserted into the slots in a specific winding pattern, with only windings of the same phase lying in one slot.
  • the problem of noise development plays an important role in the development of three-phase generators.
  • the changing magnetic fields in the air gap contribute to this, the air gap field being created by superposing the main field of the rotor and the field of the armature reaction of the stator.
  • These magnetic noises are countered with different measures, for example by enlarging the air gap or tighter manufacturing tolerances.
  • An effective measure to reduce the noise is the so-called claw lifting, a beveling of the running pole edges of the
  • This change in the claw pole shape reduces the effects of the armature reaction of the stator currents, which causes a strong field distortion in the air gap when the generator is subjected to electrical loads and thereby causes the noise.
  • the stand according to the invention with the features of claim 1 has the advantage that a noise reduction is achieved by an intervention in the stator winding.
  • no change in the claw poles or no change in their shape is necessary to achieve this noise reduction, which leads to financial savings in production and storage.
  • the course of the air gap field can be influenced such that a noise reduction is achieved.
  • FIG. 1 shows a winding diagram of an offset shaft winding according to a first exemplary embodiment of the invention
  • FIG. 2 shows a winding diagram of an offset shaft winding according to a second exemplary embodiment of the invention
  • FIG. 3 shows noise level diagrams for three different winding diagrams.
  • FIG. 1 shows a plan view of an essentially flat stator iron 10 which is packaged from individual strip-shaped lamellae 13 arranged next to one another.
  • the flat stator iron 10 for example with thirty-six or forty-eight slots 16, there are a total of three strands 19 of a slender winding in a three-strand machine
  • the strand 19.1 consists of a multiple of a group 22 of several coils, a first coil 24 and a second coil 27.
  • the first coil 24 has first coil sides 28 and second coil sides 29 which are inserted in slots 16 which are spaced apart by electrical 180 ° ,
  • the second coil 27 also has first coil sides 30 and second coil sides 1, which in turn are inserted in slots 16 which are 180 ° apart electrically.
  • a winding ratio of 5: 1 is thus achieved here.
  • a corresponding number of groups corresponds to the number of pole pairs specified for
  • the first group 22 of the strand 19.1 is arranged in the slots 16 as follows: the first coil sides 28 are located in the first slot 16.1, the second coil sides 29 are located in the fourth slot 16.4. The first coil sides 30 are in the second groove 16.2, the second coil sides 31 are in the fifth groove 16.5.
  • a second strand 19.2 with its coil sides, coil side connectors and group connectors is arranged in the same way, but with the difference that all corresponding strand regions are offset by 3607m in the direction of R1.
  • the second strand 19.2 thus begins with an electrical 120 ° offset with the start of the strand V in groove 16.3, the third strand 19.3 begins with the beginning of the strand W in groove 16.5 and so on.
  • FIG. 2 again shows a plan view of an essentially flat stator iron 10.
  • a total of three strands 19 of a stator winding 21 are inserted into the flat stator iron 10, for example with thirty-six or forty-eight slots 16, in which case only the strand 19.1 with the end of the strand U is located.
  • the strand 19.1 also consists of a group 22 of several coils, a first coil 24, a second coil 27 and a third coil 50.
  • the first coil 24 has first ones Coil sides 28 and second coil sides 29, which are inserted in slots 16, which are landed by electrical 180 °.
  • the second coil 27 also has first coil sides 30 and second coil sides 31, which in turn are inserted in slots 16 which are electrically 180 ° apart.
  • the second coil 27 is offset from the first coil 24 in a first direction R1 by an electrical 1807 m.
  • the third coil 50 also has first coil sides 51 and second coil sides 52 which are inserted into slots 16 which are electrically 180 ° apart.
  • the third coil 50 is offset from the first coil 24 in a second direction R2 by 1807 m electrically.
  • the second direction R2 is opposite to the first direction R1. It is provided that the third coil 50 has fewer turns than the first coil 24.
  • m 3 so that the offset between the first coil 24 and the second coil 27 is electrical 60 °.
  • the offset between the first and the third coil is electrical -60 °.
  • a corresponding number of groups 22 are arranged one after the other offset by 360 ° in the stator. If the electrical machine has six or eight pole pairs, six or eight groups 22 are correspondingly arranged in the stator.
  • the first group 22 of the strand 19.1 is arranged in the slots 16 as follows: the first coil sides 28 are located in the second slot 16.2, the second coil sides 29 are located in the fifth slot 16.5. The first coil sides 30 are in the third groove 16.3, the second coil sides 31 are in the sixth groove 16.6. The first coil cables 51 are located in the first slot 16.1, the second coil sides 52 are located in the fourth slot 16.4.
  • a second strand 19.2 with its coil sides, coil side connectors and group connectors is arranged in the same way, but with the difference that all corresponding strand regions are offset by 3607m in the direction of R1.
  • the second strand 19.2 begins with the beginning of the strand V in groove 16.3, the third strand 19.3 begins with the beginning of the strand W in groove 16.5 and so on.
  • the strands 19 can be wound both with a single wire and with a multiple wire.
  • Multiple wire means that two or more parallel wires are wound simultaneously during winding.
  • Z w of the first coil / Z w of the second coil 4: 1; 5: 1; 6: 1; 7: 1; 8: 1; 2: 4; 4: 2; 2: 5; 5: 2; 2: 6;
  • the stand is a so-called flat packet stand.
  • the stand is manufactured using a specific manufacturing process.
  • a winding is inserted into an essentially flat stator iron 10, which is packaged from individual strip-shaped lamellae 13 arranged next to one another, and then the stator iron 10 with the winding is bent round so that it corresponds to an annular stator which is customary in terms of its electrical properties ,
  • the coil sides of the winding or the strands 19 are shaped before being inserted in a tool in such a way that those for one Groove 16 provided coil sides are adapted to a groove contour after the round bending.
  • the stator should be the stator of a three-strand machine, in particular a three-phase generator.
  • the magnetic field in the air gap can be designed by changing the armature field in such a way that the magnetic noise is reduced.
  • the airborne noise level L (dB (A)) is particularly in the lower speed range of 2000 revolutions per minute (generator speed) with winding ratios of 5: 1 (b.) And 4: 2 ( c.) greatly reduced compared to the non-offset winding arrangement according to Figure la). Since a generator speed of 2000 revolutions per minute with a usual gear ratio of approx. 3: 1 corresponds to an engine speed of 600 to 700 revolutions per minute, the noise reduction achieved is quite noticeable for the vehicle occupants, since the engine is still relatively quiet at idling speeds.
  • Another advantage of the offset winding is that the generator efficiency is improved. This is due to the lower iron losses caused by the lower harmonic content of the air gap magnetic field. With a delta connection of the three phase windings, the circulating currents caused by the third harmonic in the stator windings and the associated losses are reduced. Otherwise the ripple of the DC voltage supplied is reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

L'invention concerne un stator pour générateur à courant triphasé, présentant un enroulement de stator polyphasé, caractérisé en ce que chacune des m voies d'enroulement (19) comprend un groupe (22) présentant : une première bobine (24) ayant des côtés de bobine (28, 29) situés dans des encoches (16) à distance entre elles d'un angle électrique de 180 DEG , la première bobine ayant un nombre de spires prédéterminé (zw), une seconde bobine (27) ayant des côtés de bobine (29, 30) situés dans des encoches (16) à distance entre elles d'un angle électrique de 180 DEG , en ce que la seconde bobine (27) est décalée d'un angle électrique de 180 DEG /m de la première bobine (24) dans une première direction, et en ce qu'en correspondance avec le nombre de paire de pôles prédéterminé, des groupes (22), en un nombre correspondant, sont disposés successivement, décalés d'un angle électrique de 360 DEG dans le stator.
EP04787245A 2003-09-30 2004-09-29 Stator pour machine electrique Withdrawn EP1671411A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10347486 2003-09-30
PCT/EP2004/052354 WO2005034308A1 (fr) 2003-09-30 2004-09-29 Stator pour machine electrique

Publications (1)

Publication Number Publication Date
EP1671411A1 true EP1671411A1 (fr) 2006-06-21

Family

ID=34399481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04787245A Withdrawn EP1671411A1 (fr) 2003-09-30 2004-09-29 Stator pour machine electrique

Country Status (3)

Country Link
US (1) US20070108863A1 (fr)
EP (1) EP1671411A1 (fr)
WO (1) WO2005034308A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005023363A1 (de) 2005-05-20 2006-11-23 Robert Bosch Gmbh Fünfphasiger Generator
US8124839B2 (en) 2005-06-08 2012-02-28 Ceres, Inc. Identification of terpenoid-biosynthesis related regulatory protein-regulatory region associations
US8222482B2 (en) 2006-01-26 2012-07-17 Ceres, Inc. Modulating plant oil levels
JP4745857B2 (ja) * 2006-02-20 2011-08-10 三菱電機株式会社 電気機械
US20130191941A1 (en) 2006-07-05 2013-07-25 Shing Kwok Modulating light response pathways in plants, increasing light-related tolerances in plants, and increasing biomass in plants
CA3100435C (fr) 2008-02-15 2024-01-30 Ceres, Inc. Tolerance a la secheresse et a la chaleur chez les plantes
TWM346978U (en) * 2008-06-27 2008-12-11 chao-xiong Lin Triphase rotary electric power generator
DE102008057349B3 (de) * 2008-11-14 2010-07-15 Feaam Gmbh Elektrische Maschine
DE102010053717A1 (de) * 2010-12-01 2012-06-06 Robert Bosch Gmbh Ständerwicklung mit mehreren Phasenwicklungen
DE102013226899A1 (de) 2013-12-20 2015-07-09 Robert Bosch Gmbh Verfahren zum Einbringen einer Wicklung aus mehreren Strängen durch Einziehen in ein rundes Ständereisen mit Nuten

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3600619A (en) * 1970-06-05 1971-08-17 Lincoln Tool & Mfg Co Stator winding
DE2921115A1 (de) * 1979-05-25 1980-12-04 Bosch Gmbh Robert Wickelverfahren fuer einen elektrischen generator und danach hergestellter drehstromgenerator
DE3141153A1 (de) * 1981-10-16 1983-04-28 Robert Bosch Gmbh, 7000 Stuttgart Drehstromgenerator mit wellenwicklung
US4476422A (en) * 1983-04-11 1984-10-09 Westinghouse Electric Corp. Single phase four pole/six pole motor
US4675591A (en) * 1985-04-19 1987-06-23 A. O. Smith Corporation Induction motor winding
KR940001176B1 (ko) * 1990-07-19 1994-02-16 가부시끼가이샤 도시바 3상 전기자 권선
DE19845520C2 (de) * 1998-10-02 2000-12-07 Siemens Ag Bürstenlose an ein Kraftfahrzeug-Bordnetz anschließbare Elektromaschine, insbesondere Starter-Generator
EP1052769B1 (fr) * 1999-05-14 2016-01-06 Nissan Motor Co., Ltd. Onduleur et moteur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005034308A1 *

Also Published As

Publication number Publication date
US20070108863A1 (en) 2007-05-17
WO2005034308A1 (fr) 2005-04-14

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