EP1882293A1 - Moteur electrique pourvu d'un systeme d'enroulements comportant des groupes de bobines - Google Patents

Moteur electrique pourvu d'un systeme d'enroulements comportant des groupes de bobines

Info

Publication number
EP1882293A1
EP1882293A1 EP06755200A EP06755200A EP1882293A1 EP 1882293 A1 EP1882293 A1 EP 1882293A1 EP 06755200 A EP06755200 A EP 06755200A EP 06755200 A EP06755200 A EP 06755200A EP 1882293 A1 EP1882293 A1 EP 1882293A1
Authority
EP
European Patent Office
Prior art keywords
winding
coils
stator
machine according
electrical machine
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Withdrawn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
EP06755200A
Other languages
German (de)
English (en)
Inventor
Rolf Vollmer
Holger Schunk
Albrecht Storath
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP1882293A1 publication Critical patent/EP1882293A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
    • 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

Definitions

  • the invention relates to an electric machine with a stator, which comprises a winding system with three winding strands, and with a Nutzpolpocress.
  • Synchronma ⁇ running electrical machine often comprises operating ⁇ times on a certain torque ripple.
  • various measures are known.
  • the DE is given 199 61 760 Al that special winding factors result in the slots of the stator arranged winding system and a skew of the slots to a Redu ⁇ cation of the torque ripple.
  • DE 101 14 014 A1 discloses a permanent-magnet induction machine whose stator has beveled slots for receiving the winding system.
  • the special Ausure ⁇ tion of the stator and the winding system leads to a substantial suppression of Nutrastens and the fifth harmonic.
  • each winding strand contains at least one group of coils
  • each coil group comprises an even number of electrically he in Rei ⁇ connected individual coils, in each case a one cause ⁇ zelmagnetfeld
  • two of the individual coils of a coil group are staggered so in a circumferential direction of the stator against one another in each case that the corresponding individual magnetic fields of having an electrical offset angle at the sixth harmonic of the pole pair number gegeneinan ⁇ equal to a is an odd multiple of 180 °.
  • a cause of the torque ripple is a fluctuation of the magnetic conductance caused by saturation phenomena.
  • locally limited regions can form in the stator, in which the magnetic material of the stator laminated core temporarily saturates.
  • the position of these saturation regions within the stator also changes.
  • the influence of these virtual teeth can be suppressed by providing mutual compensation of the peripheral regions with local saturation.
  • This is achieved by means of the winding system according to the invention and in this respect particularly advantageous.
  • the individual magnetic fields thus cancel each other out at the sixth harmonic and thus precisely in their due to the virtual teeth adverse effect on the torque, so that a total of a greatly improved torque behavior results in a reduced ripple.
  • Toothed coils are formed and in particular each enclose a tooth disposed between adjacent grooves. Tooth coils simplify the production of the electric machine considerably.
  • the stand for receiving the tooth coils may have grooves with side walls, wherein the side walls of the grooves, which are associated with a tooth coil, are parallel to each other.
  • the respective grooves and also the tooth surrounded by the toothed coil are thus formed parallel flanked.
  • the electric machine is a permanent-magnet machine in which a runner equipped with permanent magnets is provided. Permanent magnet machines, motors into ⁇ special permanent magnet synchronous machine as Synchronmo-, today are often mass-produced, which is a small
  • the space-saving tooth coils preferably used take the bill.
  • the achievable low torque ripple offers a cost advantage that has particular relevance for mass products.
  • the stator for receiving the individual coils has a total of twenty-four slots.
  • a Nutzpolcruplast p N is provided in particular seven. This calculates a Rastpolcruress p R according to:
  • the Rastpolschreibiere p R describes a caused by reluctance forces between the permanent magnet of Läu ⁇ fers and teeth of the stator Nutrasten.
  • the Rastpolschreibiere p R of 168 leads to a Oberfeldanteil with a very high order. Consequently, this Oberfeldanteil already heavily attenuated, and the associated Nutrasten falls practically negligible. Separate suppression measures, such as a skew in the stand and / or in the runner, are therefore not required. This has a favorable effect on the production costs.
  • the coil groups of each of the Wicklungssträn ⁇ ge electrically connected in series. This is favorable for e lectric machines out for a low speed ⁇ sets are.
  • the coil groups of each of the winding strands are electrically connected in parallel. This is favorable for electric machines which are designed for a high speed. Also favorable is a variant in which a rotor designed as an external rotor or as an internal rotor is provided.
  • the favorable winding system described above can be used in both embodiments with the advantages mentioned.
  • FIG. 1 shows an embodiment of an electrical machine with parallel-sided stator slots in cross-sectional illustration
  • FIG. 2 shows an enlarged detail of a stator slot of the electric machine of FIG. 1 equipped with a toothed coil
  • FIG. 3 shows a first exemplary embodiment of a winding diagram of the electric machine of FIG. 1 and FIG
  • FIG. 4 shows a second embodiment of a winding diagram of the electric machine of FIG. 1
  • an embodiment of an electric Ma ⁇ machine 1 is shown in cross-sectional view. It is designed as per ⁇ manenterregter synchronous motor and includes a stator 2 and a rotor 3, which is mounted around a rotation axis 4 rotatable ⁇ bar.
  • the rotor 3 is an internal rotor, which is provided in the exemplary embodiment with a total of fourteen permanent magnets 5, so that there is a Nutzpolzipiere p N of Sie ⁇ ben.
  • the stator 2 contains on its inner wall facing the rotor 3 several, in the embodiment of FIG.
  • each of the toothed coils 11 surrounds one of the parallel-sided teeth 7.
  • the two adjacent grooves 6 and the enclosed tooth 7 each have parallel side walls, so that the prefabricated toothed coil 11 easily fits into the laminated core of the stand 2 can be used.
  • This he ⁇ facilitates the production of the electric machine 1 considerably.
  • such a high groove filling can be achieved, and the electric machine 1 can be realized very compact and with low material costs.
  • the tooth coils 11 are single-layered.
  • the electrical conductor ⁇ rule 9 of the respective tooth coil windings fill the grooves 6, in which they are laid, substantially completely.
  • FIGS. 3 and 4 Details of the winding system 10 can be taken from the two simplified winding schemes according to FIGS. 3 and 4.
  • two embodiments of a coil system 12 or 13, which generally prepared according to the same principle ⁇ builds are, however, contain a different interconnection in the region of a winding head fourteenth
  • an area for a winding head 14 and 15 is provided in the axial direction, ie in the direction of the axis of rotation 4, on both end sides of the actual active part of the stator 2. While diverted only the conductor 9 of the tooth coil windings in the area of the winding head 15 ⁇ to, occurs in the region of the winding head 14 and a electrical interconnection see the tooth coils. 11
  • the individual coils forming tooth coils 11 are in the two embodiments to a total of six coil groups 16 to 21, of which two are assigned to one of three winding strands 22 to 24, respectively.
  • the two to one of the coil groups 16 are arranged to 21 combined tooth coils 11 in the circumferential direction next to one another and on the other offset by an angle at circumference ⁇ m ech of 30 ° gegenein ⁇ . They are also electrically connected in series, wherein both tooth coils 11 are gewi ⁇ ckelt in opposite directions.
  • the coil groups 16 and 17, 18 and 19 or 20 and 21 assigned to one of the winding phases 22 to 24 are electrically connected in series, whereas they are electrically connected in parallel in the winding system 13 according to FIG.
  • the first winding strand 22 is shown with a solid line, the second winding strand 23 with dashed lines and the third winding strand 24 with dash-dotted lines.
  • the first winding strand 22 contains the first coil group 16 with two toothed coils 11, whose conductors 9 extend in the first and second or in the third and fourth groove 6, and the second coil group 17 with two toothed coils 11, the Lei ⁇ ter 9 in the thirteenth and fourteenth or run in the five ⁇ tenth and sixteenth groove 6.
  • the second winding strand 23 contains the third coil group 18 with two toothed coils 11, the conductors 9 of which run in the ninth and tenth and eleventh and twelfth grooves 6, and the fourth coil group 19 with two toothed coils 11, whose conductors 9 in the twenty-first and twenty-second resp Twenty-third and Twenty-fourth Grove 6 are
  • the third winding strand 24 contains the fifth coil group 20 with two toothed coils 11, whose conductors 9 in the seventeen ten and eighteenth or in the nineteenth and twentieth groove 6, and the sixth coil group 21 with two tooth coils 11, whose conductors 9 in the fifth and sixth and in the seventh and eighth groove 6 run.
  • Each of the winding strands 22 to 24 includes pairs of toothed coils 11 which are offset from each other by half a circumferential turn.
  • these are, for example, the two toothed coils 11, whose conductors 9 run in the first and second or in the thirteenth and fourteenth grooves 6.
  • the two tooth coils 11 such Paa ⁇ re are each wound in opposite directions to prevent mutual compensation of the individual magnetic fields generated by two tooth coils 11 at the Nutzpolzipiere p N.
  • the electric machine 1 may have an un ⁇ desired torque ripple, come for the different causes in question.
  • reluctance forces between the permanent magnets 5 and the teeth 7 and 8 cause a cogging with a Rastpolfunction uncomfortable p R.
  • the latter is determined by the Nutzpolpressiere p N and the number N of the grooves 6 in the stator 2.
  • p N has a value of seven and N a value of twenty-four.
  • the Rastpolfunctioniere p R assumes a high value of 168, so that the associated Feldan ⁇ part is strongly attenuated and the cogging can be virtually ruled out as the cause of the torque ripple.
  • the special winding systems 12 and 13 largely suppress the formation of the saturation regions and thus of the virtual teeth, resulting in a very low torque ripple.
  • the tooth coils 11 each generate a single magnetic field.
  • ⁇ on the circumferentially offset arrangement fundamentally have the individual magnetic fields of the one of the coil groups 16 to 21 associated with tooth coils 11 an electrical offset angle ⁇ e i on.
  • the latter is at the decisive for the influence of the virtual teeth sixth harmonic Nutzpolzipress p N equal to an odd multiple of 180 °, so that cancel these individual magnetic fields at the sixth harmonic each other.
  • the Einzelmag- have netfelder in the sixth harmonic of the pole pair number p N an electrical offset angle ⁇ e i of an odd-numbered ⁇ gen multiple of 180 °.
  • this condition is to be met with coil groups having an even number of individual coils.
  • the electric machine 1 offers the option of using tooth coils 11 from a manufacturing point of view. It can be dispensed with otherwise customary costly measures such as skewing or staggering of the grooves 6 or the Perma ⁇ nentmagnete 5. Nevertheless, results due to the favorable properties of the winding system 10, 12 or 13, a very low torque ripple. In particular, the winding system suppresses 10, so that they do not contribute to Drehmo ⁇ mentwelltechnik afford 12 or 13 the influence of the virtual teeth.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

Moteur électrique (1) qui possède un stator (2) comportant un système d'enroulements (10) pourvu de trois faisceaux d'enroulements, et d'un certain nombre de paires de pôles utiles. Chaque faisceau d'enroulements contient au moins un groupe de bobines. Chaque groupe de bobines contient un nombre pair de bobines individuelles (11) connectées électriquement en série qui provoquent chacune un champ magnétique individuel. Les bobines individuelles (11) d'un groupe de bobines sont situées par deux de manière décalée l'une par rapport à l'autre dans le sens périphérique du stator (2) de manière telle que les champs magnétiques individuels associés présentent l'un par rapport à l'autre au niveau de la sixième harmonique du nombre de paires de pôles utiles un angle de décalage électrique équivalant à un multiple impair de 180°.
EP06755200A 2005-05-17 2006-05-16 Moteur electrique pourvu d'un systeme d'enroulements comportant des groupes de bobines Withdrawn EP1882293A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005022548A DE102005022548A1 (de) 2005-05-17 2005-05-17 Elektrische Maschine mit einem Wicklungssystem mit Spulengruppen
PCT/EP2006/062325 WO2006122927A1 (fr) 2005-05-17 2006-05-16 Moteur electrique pourvu d'un systeme d'enroulements comportant des groupes de bobines

Publications (1)

Publication Number Publication Date
EP1882293A1 true EP1882293A1 (fr) 2008-01-30

Family

ID=36763554

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06755200A Withdrawn EP1882293A1 (fr) 2005-05-17 2006-05-16 Moteur electrique pourvu d'un systeme d'enroulements comportant des groupes de bobines

Country Status (4)

Country Link
US (1) US7732967B2 (fr)
EP (1) EP1882293A1 (fr)
DE (1) DE102005022548A1 (fr)
WO (1) WO2006122927A1 (fr)

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EP2251075B1 (fr) * 2008-03-14 2013-12-25 Mitsubishi Heavy Industries, Ltd. Procédé de déshydratation
EP2139100B1 (fr) * 2008-06-27 2012-10-31 Siemens Aktiengesellschaft Machine synchrone à aimants permanents dotée d'une ondulation de couple réduite
DE102010001997B4 (de) 2010-02-16 2016-07-28 Siemens Aktiengesellschaft Linearmotor mit verminderter Kraftwelligkeit
DE102010028872A1 (de) 2010-05-11 2011-11-17 Siemens Aktiengesellschaft Antriebsvorrichtung für Dreh- und Linearbewegungen mit entkoppelten Trägheiten
JP5267521B2 (ja) * 2010-08-05 2013-08-21 株式会社デンソー 回転電機のステータ及びその製造方法
US20120104879A1 (en) 2010-11-03 2012-05-03 Krishnan Ramu Noise reduction structures for electrical machines
EP2508769B1 (fr) 2011-04-06 2013-06-19 Siemens Aktiengesellschaft Dispositif de palier magnetique axial doté d'un remplissage en fer augmenté
EP2523319B1 (fr) 2011-05-13 2013-12-18 Siemens Aktiengesellschaft Moteur linéaire cylindrique à faible pulsation de couple
EP2604876B1 (fr) 2011-12-12 2019-09-25 Siemens Aktiengesellschaft Palier radial magnétique doté de tôles de noyau uniques en direction tangentielle
EP2639934B1 (fr) 2012-03-16 2015-04-29 Siemens Aktiengesellschaft Rotor à excitation permanente, machine électrique dotée d'un tel rotor et procédé de fabrication du rotor
EP2639936B1 (fr) 2012-03-16 2015-04-29 Siemens Aktiengesellschaft Machine électrique à rotor excité en permanence et rotor excité en permanence correspondant
EP2639935B1 (fr) 2012-03-16 2014-11-26 Siemens Aktiengesellschaft Rotor à excitation permanente, machine électrique dotée d'un tel rotor et procédé de fabrication du rotor
EP2709238B1 (fr) 2012-09-13 2018-01-17 Siemens Aktiengesellschaft Machine synchrone à excitation permanente dotée d'aimants en ferrite
EP2793363A1 (fr) 2013-04-16 2014-10-22 Siemens Aktiengesellschaft Rotor à segments individuels avec bagues de retenue
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EP2928052A1 (fr) 2014-04-01 2015-10-07 Siemens Aktiengesellschaft Machine électrique dotée d'un stator interne excité par aimants permanents et d'un stator ayant des enroulement
EP2999090B1 (fr) 2014-09-19 2017-08-30 Siemens Aktiengesellschaft Rotor excité en permanence présentant un champ magnétique guidé
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Also Published As

Publication number Publication date
US7732967B2 (en) 2010-06-08
DE102005022548A1 (de) 2006-11-23
US20080197741A1 (en) 2008-08-21
WO2006122927A1 (fr) 2006-11-23

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