EP1999837A2 - Machine électrique à enroulement d'amortissement - Google Patents

Machine électrique à enroulement d'amortissement

Info

Publication number
EP1999837A2
EP1999837A2 EP07726423A EP07726423A EP1999837A2 EP 1999837 A2 EP1999837 A2 EP 1999837A2 EP 07726423 A EP07726423 A EP 07726423A EP 07726423 A EP07726423 A EP 07726423A EP 1999837 A2 EP1999837 A2 EP 1999837A2
Authority
EP
European Patent Office
Prior art keywords
windings
damping
winding
working
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Withdrawn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
EP07726423A
Other languages
German (de)
English (en)
Inventor
Zeljko Jajtic
Gerhard Matscheko
Stefan Schiele
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 EP1999837A2 publication Critical patent/EP1999837A2/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Withdrawn legal-status Critical Current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
    • H02K3/18—Windings for salient poles
    • H02K3/20—Windings for salient poles for auxiliary purposes, e.g. damping or commutating

Definitions

  • the present invention relates to an electrical machine for an n-phase, symmetrical, electrical system with n working windings which are assigned to the n phases and with which corresponding magnetic fluxes can be generated.
  • electrical machines fall, for example, electric direct drive motors, such as torque and line ⁇ armotoren. These must be precisely adapted to the technical requirements of the drive, in particular with regard to the required speed or the required torque. Therefore, in most direct drives relatively low speeds and high torques are required by the motor, which in turn leads to high winding inductances L and winding capacitances C of the motors, since L is proportional to l / speed and C is proportional to the torque. This results in a significantly lower resonance frequency of the motor winding compared to fast-running, smaller motors. This is proportional to 1 / vLC and is usually ⁇ in the range of about 20 kHz to 60 kHz.
  • Umrichterbe ⁇ drive the motor winding behaves like a RLC resonant circuit, which is excited by clocked voltage at the motor terminals to vibrate. The consequence of this is a considerable increase in voltage within the motor winding. The overvoltages damage the motor insulation, which often leads to insulation breakdown and motor failure with short to ground.
  • an additional circuit with Zener diodes has been galvanically connected at the neutral point of the motor winding.
  • This circuit shorts voltage spikes across a resistor to ground.
  • the neutral point of the motor winding is designed as a separate terminal.
  • a derar ⁇ term circuit is relatively expensive and represents a potential danger when connecting for the user.
  • the object of the present invention is therefore to reduce resonant overvoltages in an electric machine without great effort and, moreover, to avoid danger to the user.
  • this object is achieved by an electrical machine see for an n-phase, symmetrical electrical system with n working windings, which are associated with the n phases and with which corresponding magnetic fluxes can be generated, each of the n working windings assigned a separate attenuation ⁇ winding is, through which flows the magnetic flux of the respective working winding, and wherein the n damping windings are connected in series and a total of shortge ⁇ closed.
  • the damping windings according to the invention reduce resonant overvoltages in the machine windings or working windings.
  • Mo ⁇ torisolation example protected from breakdown.
  • the damping winding or the damping windings require no connections, so that there is no additional circuit complexity for the user.
  • Further provides a blend ⁇ unnecessary evaporation coils external terminals to which high voltages may be present, so that the potential danger for the user can be effectively lowered.
  • the shorting of the damping windings may be via a resistor.
  • the damping effect can be optimized (RL adjustment).
  • a resistor a separate component can be used, in which the power loss is intentionally dissipated (eg, for gooddeungsmög ⁇ sensitivity), or the damping winding is wound directly from a resistance wire, so that optimallvessan ⁇ fitting is achieved without a separate resistor.
  • the electric machine is designed for a 3-phase system, wherein the working windings are connected in a star shape.
  • each of the n damping windings may be wound about the same pole tooth as the associated n of work ⁇ windings. In this way it is ensured that the ge ⁇ entire magnetic flux of the main winding flows through the damper winding.
  • a plurality of pole teeth of the electric machine can be connected to one another via a single yoke, one of the n working windings can be arranged on the pole teeth, and each of the n damping windings can be located between the associated working winding and the yoke.
  • the damping windings are arranged in recesses in the yoke.
  • the construction space for the damping windings in the active part of the electrical machine can be reduced.
  • a space requirement for the damping winding can also be achieved by a meandering winding shape.
  • the damping windings can be manufactured from flat wire or from copper foil or copper tape.
  • the production of the damping winding made of copper strip can be done inexpensively by punching: punch out required contouring of the damping winding from the copper strip, insert into grooves of the electric machine and connect accordingly to the damping winding.
  • the flat shape of the winding groove geometry is not disturbed. In addition, there is thus no additional on ⁇ wall in the execution of the slot insulation.
  • the electric machine can have a cooling device in / on the damping windings.
  • This cooling device is preferably also used to cool the working windings.
  • the can be in the damping windings effectively dissipate the resulting power dissipation as the power dissipation of the normal working windings.
  • FIG. 1 shows a partial sectional view through the primary part of a linear motor according to the invention
  • 5 shows an arrangement of the damping winding according to a second embodiment
  • 6 shows the arrangement of the damping winding according to a third
  • FIG 1 illustrates in cross section schematically Darge ⁇ .
  • the illustration shows a section of the primary part with three pole teeth Zu, Zv and Zw for a 3-phase UVW system.
  • the pole teeth are connected by a yoke.
  • On the pole teeth Zu, Zv and Zw working windings Au, Av and Aw are arranged. These working windings are connected on the one hand to the corresponding phases U, V and W. On the other hand, they are interconnected to a star.
  • the prinzi- pial interconnection of the working windings Au, Av and Aw is shown schematically in FIG. The entire motor winding is thus connected in a star connection.
  • damping windings Du, Dv and Dw it is possible to reduce the resonant overvoltages in the motor winding, ie the working windings Au, Av and Aw.
  • the damping windings consisting of a few turns are located in the laminated core of the motor in the immediate vicinity of the working windings and are therefore flowed through by the magnetic fluxes that are generated in each case.
  • the damping winding arrangement with its damping windings Du, Dv and Dw has no electrical terminals. It is thus a motor-internal short-circuit winding, for which no connections are vorzu ⁇ see. As a result, the user does not have to make any wiring work and there is no danger of external terminals with high voltage.
  • the damping effect is based on the good electromagnetic ⁇ rule coupling between each working winding and the corre- hearing damper winding on the motor plate package.
  • the damping windings Du, Dv and Dw are effective only when the UVW system is asymmetric. In this case, the asymmetric components are attenuated. The useful flow, however, remains unge ⁇ damped. This means that the torque-forming, 3-phase, symmetrical current system is not affected by the damping windings.
  • a round wire R is used for the damping windings.
  • the round wire is wound or laid in a groove window N.
  • recesses T can be provided in the laminated core and especially in the yoke J in which the round wire R of the damping winding is laid or wound.
  • the graph of FIG 5 to entneh ⁇ men can be characterized the height of the working windings compared with the embodiment of FIG 4 to increase or reduce the Pol leopardin.
  • FIG 6 Another embodiment of a primary part of the invention, which is very compact design is to give in FIG 6 dirtge ⁇ .
  • a flat wire F is used for the damping windings, which can be seamlessly cling to the laminated core.
  • a copper foil can also be used for the flat wire F. This also makes it possible to better utilize the space available for the damping winding, so that the primary part can be made more compact.
  • Profit can be demonstrated by the measuring circuit of FIG.
  • a measurement voltage U ⁇ is applied to the motor terminals for the phases U, V and W. Due to the working windings Au, Av and Aw connected in a star point S, a measuring or star point voltage U s results in this star point S.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

La présente invention a pour objet de réduire les surtensions résonantes dans des machines électriques. A cet effet, dans une machine électrique destinée à un système électrique symétrique à n phases comprenant n enroulements actifs (Au,Av,Aw) qui sont associés aux n phases (U,V,W) et permettent de produire des flux magnétiques correspondants, un enroulement d'amortissement (Du,Dv,Dw) séparé est associé à chacun des n enroulements actifs (Au, Av,Aw). Le flux magnétique de l'enroulement actif respectif traverse chaque enroulement d'amortissement. Les n enroulements d'amortissement (Du, Dv,Dw) sont connectés en série et court-circuités ensemble. Cela permet aux composantes asymétriques du système d'être amorties, alors que le flux utile n'est pas altéré.
EP07726423A 2006-03-29 2007-02-20 Machine électrique à enroulement d'amortissement Withdrawn EP1999837A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006014613A DE102006014613A1 (de) 2006-03-29 2006-03-29 Elektrische Maschine mit Dämpfungswicklung
PCT/EP2007/051602 WO2007113046A2 (fr) 2006-03-29 2007-02-20 Machine électrique à enroulement d'amortissement

Publications (1)

Publication Number Publication Date
EP1999837A2 true EP1999837A2 (fr) 2008-12-10

Family

ID=38123762

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07726423A Withdrawn EP1999837A2 (fr) 2006-03-29 2007-02-20 Machine électrique à enroulement d'amortissement

Country Status (4)

Country Link
US (1) US20090174266A1 (fr)
EP (1) EP1999837A2 (fr)
DE (1) DE102006014613A1 (fr)
WO (1) WO2007113046A2 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI0924599A2 (pt) * 2009-05-26 2016-03-01 Skf Ind Trading & Dev acionador eletromagnético, sistema de suspensão, e, veículo de rodas
DE102009054390B3 (de) 2009-11-24 2011-06-30 Siemens Aktiengesellschaft, 80333 Lagerkonzept für einen Segmentmotor
DE102011079843A1 (de) 2011-07-26 2013-01-31 Siemens Aktiengesellschaft Elektrische Maschine mit massenarmer Bauart in magnetisch aktiven Teilen
EP2704293B1 (fr) 2012-09-03 2017-12-13 Siemens Aktiengesellschaft Machine électrique avec élément de base
EP2790297B1 (fr) 2013-04-08 2017-08-02 Siemens Aktiengesellschaft Rotor pour une machine électrique
CN111035364A (zh) 2014-09-24 2020-04-21 泰克宣技术有限公司 用于向用户的皮肤施加运动的设备
US10573139B2 (en) 2015-09-16 2020-02-25 Taction Technology, Inc. Tactile transducer with digital signal processing for improved fidelity
CN111342634B (zh) * 2020-02-29 2021-09-24 中国科学院电工研究所 一种带有主动控制屏蔽线圈的长电枢直线电机

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US1979665A (en) * 1933-07-26 1934-11-06 Westinghouse Electric & Mfg Co Dynamo-electric machine
CH197682A (de) * 1936-10-13 1938-05-15 Bbc Brown Boveri & Cie Wicklungsanordnung zur Unterdrückung der ungeraden Oberwellen, besonders der dritten Oberwelle, in der Feldkurve bei Schrage-Motoren.
DE732783C (de) * 1937-08-11 1943-03-13 Siemens Ag Drehstromtransformator (oder -Drossel) mit isoliertem Nullpunkt
GB545266A (en) * 1941-01-20 1942-05-18 British Thomson Houston Co Ltd Improvements in and relating to dynamo-electric machines
DE2234630A1 (de) * 1972-07-14 1974-01-31 Bosch Gmbh Robert Drehstromgenerator
JPS49104111A (fr) * 1973-02-09 1974-10-02
DE2311945B2 (de) * 1973-03-07 1978-02-02 Siemens AG, 1000 Berlin und 8000 München Elektrische synchronmaschine mit einer anlauf- und daempferwicklung
DE2741870C3 (de) * 1977-09-15 1983-04-14 Siemens AG, 1000 Berlin und 8000 München Elektrische Synchronmaschine mit Schenkelpolen
US4260925A (en) * 1978-04-17 1981-04-07 Barrett Edward L Stator for an electromagnetic transducer
JP2000511392A (ja) * 1996-05-29 2000-08-29 アセア ブラウン ボベリ アクティエボラーグ 高電圧用交流機
US6008561A (en) * 1996-10-31 1999-12-28 Emerson Electric Co. Switched reluctance motor with damping windings
JPH10174407A (ja) * 1996-12-10 1998-06-26 Daido Steel Co Ltd モータ用電磁石部品および電動モータ
US6239516B1 (en) * 1998-04-06 2001-05-29 Kollmorgan Corporation High performance ironless linear motor with supported windings
DE10049817B4 (de) * 2000-10-09 2006-12-07 Siemens Ag Induktionsvorrichtung mit Dämpfungseinrichtung
JP3960122B2 (ja) * 2002-05-01 2007-08-15 株式会社デンソー 電動圧縮機
DE10260316A1 (de) * 2002-12-20 2004-07-15 Siemens Ag Elektrische Maschine mit Wicklungen aus Litzendraht
DE10343293B4 (de) * 2003-09-18 2009-06-10 Siemens Ag Elektrische Maschine mit Dämpfungseinrichtung
GB0419406D0 (en) * 2004-09-01 2004-10-06 Switched Reluctance Drives Ltd Windings for electrical machines

Non-Patent Citations (1)

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Title
See references of WO2007113046A3 *

Also Published As

Publication number Publication date
WO2007113046A2 (fr) 2007-10-11
US20090174266A1 (en) 2009-07-09
DE102006014613A1 (de) 2007-10-11
WO2007113046A3 (fr) 2007-11-29

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