WO2019197998A1 - Corps d'enroulement pour machine électrique - Google Patents

Corps d'enroulement pour machine électrique Download PDF

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Publication number
WO2019197998A1
WO2019197998A1 PCT/IB2019/052930 IB2019052930W WO2019197998A1 WO 2019197998 A1 WO2019197998 A1 WO 2019197998A1 IB 2019052930 W IB2019052930 W IB 2019052930W WO 2019197998 A1 WO2019197998 A1 WO 2019197998A1
Authority
WO
WIPO (PCT)
Prior art keywords
winding
potential
winding body
coil
toroidal
Prior art date
Application number
PCT/IB2019/052930
Other languages
German (de)
English (en)
Inventor
Wolfgang Mühlhaus
Original Assignee
Muehlhaus Wolfgang
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 Muehlhaus Wolfgang filed Critical Muehlhaus Wolfgang
Publication of WO2019197998A1 publication Critical patent/WO2019197998A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/40—Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/02—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for suppression of electromagnetic interference
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/288—Shielding
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/40—Structural association with grounding devices

Definitions

  • the present invention relates to a winding body according to the preamble of the current claim 1.
  • winding bodies according to the preamble of claim 1, as they are known for example from DE 10 2004 006 712 Al, is possible in electrical machines, in particular in rotating electrical machines only with limited nominal voltages.
  • a winding body for an electric machine includes a toroidal coordinate system formed by a toroidal direction around a winding axis, a poloidal direction around the toriodal direction, and a direction orthogonal to the toroidal direction and perpendicular to the toroidal direction
  • Machine-usable electrical conductor is wound, the end a ground terminal and the ground terminal opposite has a potential terminal.
  • the winding adjoining the potential connection referred to below as potential winding, in the coil has a coil
  • Massewindung Ground connection subsequent winding
  • the specified winding body is based on the consideration that when the electrical conductor of the coil of the aforementioned
  • Winding body is guided unshielded by electrically conductive material, even in the upper medium voltage range so high electric field strengths arise that it comes in air to partial discharges and glowing. If the above-mentioned winding body is used for example in a steel groove of a rotor and / or stator of a rotating electrical machine, the steel groove is in all
  • the winding can be done in a direct way or in another approximate way, such as spiral. In this way, the to the
  • Massewindung arranged at least one electric screen element and to an electric potential of a turn between the
  • the shield element influences the of
  • type B Potental connection to earth energized electric field such that itself seeping equipotential surfaces are drawn into the winding body between the adjacent to the grooves turns and the grooves and thus de-energized.
  • a screen element connected directly to one of the turns is referred to below as type B.
  • the type B allows either the safety distance of the
  • the control of the equipotential surfaces with the shielding element is particularly effective when the shielding element at least partially encloses the potential connection poloidal.
  • the specified winding body can in the range of the safety distance between the
  • Windings insulated electrical screen device may be arranged.
  • the shielding device may be any desired, for example, as a sheet metal, grid mesh or as applied to an insulating conductive coating
  • Shield device operates differently than the shield element of the above-mentioned type B ohmic-capacitive and is hereinafter referred to as type C of a possible embodiment of the invention.
  • type C is particularly suitable in areas of the winding body in the very high between two radially spaced turns
  • the turns of the specified winding body can be connected poloidal in a predetermined toroidal transition region, wherein the shield element and / or the shield plate is interrupted in this toroidal transition region. In this way, short circuits between the individual turns of the specified winding body are effectively prevented.
  • the electrical line is formed from a series connection of a number of inductors with wires wound in the toroidal direction, which is equal to the number of turns.
  • the so wound wires in The individual windings build up an inductive field and act in this way ohmic-inductive.
  • This embodiment of the invention will hereinafter be referred to as type D and may be used in the same way as the type C described above.
  • a cross section of the electrical conductor is variable from the potential connection to the ground connection, in particular widening in the poloidal direction.
  • the electrical conductors expands at least in the poloidal direction and forms a radial channel for carrying a supply line to the potential terminal.
  • the radial channel is electrically shielded.
  • an electrical machine in particular a rotating electrical machine, comprises a
  • the electric machine may comprise a stator and a stator rotatable with respect to the rotor, wherein the winding body is arranged in a groove which is formed either in the stator or in the rotor.
  • FIG. 1 is a schematic view of a winding body in a
  • FIG. 2 shows a schematic view of the winding body of FIG. 1 in another, toloidally displaced Toloidalschitt,
  • FIG. 3 shows a schematic view of the winding body of FIGS. 1 and 2 in another, toloidally displaced Toloidalschitt,
  • Fig. 4 is a schematic view of field control elements in the
  • FIG. 5 shows a schematic view of the winding body of FIG. 3 in a further, toloidally displaced toloidal section, FIG.
  • FIG. 6 shows a schematic view of the winding body of FIGS. 1 to 3 from a view in the direction of a winding axis of the winding body
  • Fig. 7 is a schematic view of a development of
  • FIG. 8 is a schematic view of an alternative embodiment of the winding body in a Toloidalschitt
  • FIG. 9 shows a schematic view of the winding body according to FIG. 8 in a toloidally displaced toloidal section
  • FIGS. 8 and 9 shows a schematic partial view of the winding body according to FIGS. 8 and 9 from a radial perspective.
  • the winding body By inserting the winding body in steel grooves of the rotor and stator rotating electrical machines, the winding body at all inputs and outputs to the steel grooves of the electrical
  • Shielding devices can be selectively contained electrical field, so that too high electrical field strengths no longer occur at vulnerable points, so that operation of electrical machines is basically possible with each rated voltage.
  • Shielding elements and / or shielding devices are in and / or on the winding body mounted electrically conductive elements that influence there on the
  • electrical components such as sheets, grid mesh, electrically conductive coatings and the like.
  • the electric fields with four
  • Possibilities are selectively controlled in a winding body of an electric machine, which can also be combined with each other:
  • Type A the use of the own electrical potentials of each individual winding in the winding body
  • Type B direct electrically conductive connection between a
  • Type C an ohmic - capacitive coupling between a
  • Shielding device in the winding body for potential generation
  • Type D an inductive coupling by subdivision of a winding into several series-connected inductors for potential generation.
  • the individual windings are introduced into the grooves in such a way that the applied voltages of the individual windings to ground rise inwards from an outside of the winding body.
  • the winding with the highest voltage is in the center of the winding body.
  • the surrounding windings thus already capture part of the electric field.
  • Shield elements, shield devices or the like electrical potentials are defined, which is the subject of types B, C and D.
  • Winding body forming electrical line from a winding.
  • type D bundles several windings in the used geometry of a turn.
  • the geometry of the winding body cross-section and shielding or shielding devices can be adapted to the groove cross-section (circular, rectangular, trapezoidal, etc., or a combination thereof) and followed as far as possible. If there are several winding bodies in the groove, the groove geometry is among the
  • split winding bodies In the outer area of the winding body can also windings with uncritical voltage to ground or the windings of adjacent winding body to fill
  • the winding body consists mainly of 5 areas:
  • Winding "Adaptation to connection area”, “Connection area”, “Adaptation to winding”, “Winding offset” .
  • Winding offset There may also be other areas due to narrow arcs on the winding heads after groove outlet, introduction and guidance of all kinds of accessories, etc. come.
  • Winding layers increase due to the expansion of the winding body from the inside to the outside. In order to maintain a maximum field strength between the winding layers or the environment, therefore, suitable measures must be taken if the maximum differential voltage between the adjacent winding layers or the surroundings of the winding body is exceeded.
  • Type A requires a conductor arrangement in which the maximum projected field strength with respect to the adjacent position is not exceeded by the number of individual turns per winding position.
  • Conductor cross sections of the outermost layer are relatively thin and long run and follow with the length of the geometry of
  • the effective conductor cross-section remains constant.
  • Windings are mounted, which widen the turn of the electrical conductor field and reduce the field effective distance between adjacent turns of a winding layer.
  • Shield elements or screen devices is a safe
  • Umbrella devices basically does not matter. They should prevent a relevant electric field penetration, resulting in capacitive currents without relevant voltage drop and
  • the terminal of the outermost winding 2 is connected to fix the electrical winding potentials via the neutral point with the machine ground.
  • the connection of the innermost turn 3 is connected to a highest potential, ie the supply potential of a consumer as electrical
  • each turn 1, 2, 3 has a winding here, as already mentioned. Per turn 1, 2, 3 more Windings cause a series connection of inductors with which type D can be realized.
  • the cross section of the winding body is circular in the example and the windings 1 arranged in a helical manner according to type A.
  • Winding body is designed for a rated voltage of 110 kV.
  • the grading can be adapted to the different isolation media.
  • Voltage within the seventh turn 4 is an electrical one
  • Shield element 6 is electrically connected, which intercepts the fields of the adjacent winding 4 or other shielding elements 6 (see Figure 1).
  • Shield element 6 can be continuous throughout the entire winding or partially.
  • the resulting possibly resulting gap in the field control is the field of field-generating turn 4th
  • FIG. 1 shows a helical arrangement of the windings 1, 2, 3,
  • electric umbrella elements 8 are connected to the screen elements 7 of the lead-out for connecting the potential winding 3 to a Potential connection, here connected in the form of the high voltage connection.
  • Massewindung 2 takes place here by the sheath 5, taking into account their electrical potential, when the sheath 5 is electrically conductive.
  • FIG. 2 shows the screw geometry broken up for the connection of the potential winding 3 with the screen elements 7 and 8 and FIGS
  • Reference numerals of the outermost windings 2 and 3 are provided to indicate where the lead-outs belong.
  • electrical shielding elements 6 are arranged in this area, which for structural reasons with no winding
  • the outer sheath 5 serves to protect the windings, for cooling, for guiding lines, etc. If the sheath 5 is electrically conductive, the sheath 5 should be connected to ground potential, against the
  • Sheet metal isolation of the grooves and shorts on the enclosure 5 can be avoided. If the envelope 5 is connected to the ground winding 2 instead of a ground terminal or replaced it
  • Shield element 6 The electrical shielding elements 14 in the example, as illustrated in Figure 4, separated, to a short circuit of the field-giving windings 4 and over the machine induction
  • the separation points 15 of the individual screen elements 14 may be offset (FIG. 4) in order to minimize negative influences on the field control. Should the electric field penetrate too much through the resulting gap, the ends of the electrical shielding elements 14 may overlap in isolation.
  • An electrically conductive sheath 5 is the
  • FIG. 3 shows the electrical shield elements 14 and connections of the individual windings during offset, with only the connections 10, 11 and field control windings 4, the offset 13 of the outermost turn 2 into the regular winding geometry, and the transition 12 to the innermost turn 3 shown for clarity are.
  • FIG. 4 shows the prevention of winding short-circuits
  • the shield devices 14 are separated analogous to those in the winding offset.
  • Their geometry and that of the cladding 5 are adapted to the two different geometry arrangements 5-9 and 6-8 to be connected.
  • FIG. 5 shows the connections of the individual turns in the
  • the screen devices are the same as the screen elements, which is why they are provided in the figures with the same reference numerals.
  • Figure 8 shows an arrangement of the windings 1 for a narrow
  • FIG. 9 shows the connection of the innermost turn 3 in the
  • Shield devices 6 an electrical potential depending on the capacities and ohmic conductances between the individual
  • Shield devices 6 and their adjacent turns 1 The potentials between the shield devices 6 provide the voltage acting on the intervening region.
  • Type C is suitable, inter alia, for insertion onto a subsection of the winding body of limited screen devices for generating additional potentials for lead-outs, if the in
  • Winding body used voltage rating is too large.
  • Figure 10 shows on a portion of the winding body limited protection devices 6a, which are connected to the transfer of the control potential with the additional protection devices 7a.
  • the potentials of the individual shielding elements and shielding devices should be configured such that their voltage at the openings of their cross-sectional geometry, as used in the example, is as low as possible with respect to the voltages of the turns 1 located there. As a result, the penetration of the electric field is minimized.
  • Voltage oscillations by e.g. Switching operations, residual ripple of the network, etc. must also be taken into account the capacities to avoid harmful potential distortions of the screen devices and
  • Shield devices and shield elements change their areas and thus the capacitance values of the individual capacitances and the transconductances of the ohmic-capacitive voltage divider in Type-C. For adaptation to projected potentials, these can be determined by the dielectric constants Er or the transverse conductivities of the insulating means, the resulting distances between the shielding devices and shielding elements of others
  • Transverse conductance a mixture of different insulating materials with different dielectric constant Er or transverse conductance can be used, wherein the resulting dielectric constant Er or the resulting transmittance is changed by the mixing ratio. It is also possible to apply a plurality of insulation layers with different dielectric constants Er or transverse conductance between the individual screen devices and screen elements as well as the windings. The adjustment takes place via the
  • Umbrella devices and screen elements are increased by additional bulges in cross-section or similar constructive measures. To increase the area also attachments outside the winding body can be used.
  • Type D The additional introduction of windings into each individual winding for potential generation for the shielding devices and shielding elements in the existing winding bodies of electrical machines as an example of inductive coupling basically works like type B.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Regulation Of General Use Transformers (AREA)

Abstract

L'invention concerne un corps d'enroulement destiné à une machine électrique et comprenant une bobine qui est agencée dans un système de coordonnées toroïdal défini par une direction toroïdale orientée autour d'un axe d'enroulement, par une direction poloïdale orientée autour de la direction toroïdale, et par une direction radiale orientée perpendiculairement à la direction toroïdale et perpendiculairement à la direction poloïdale, et qui est enroulée dans la direction toroïdale en un certain nombre de spires à partir d'un conducteur électrique qui peut être placé dans un support d'enroulement de la machine électrique et qui présente côté extrémité un raccordement de terre et un raccordement de potentiel opposé au raccordement de terre. L'invention est caractérisée en ce que, vues dans tous les plans toroïdaux, la spire se raccordant au raccordement de potentiel, ci-après appelée spire de potentiel, est agencée dans la bobine à une distance de sécurité d'un bord de bobine délimitant les plans toroïdaux, la spire se raccordant au raccordement de terre, ci-après appelée spire de terre, est agencée à l'intérieur de la bobine au niveau du bord de bobine, et les autres spires sont enroulées à partir de la spire de potentiel vers la spire de terre.
PCT/IB2019/052930 2018-04-09 2019-04-09 Corps d'enroulement pour machine électrique WO2019197998A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102018002857.8 2018-04-09
DE102018002857 2018-04-09
DE102018010048.1 2018-12-19
DE102018010048.1A DE102018010048A1 (de) 2018-04-09 2018-12-19 unabhängige Feldsteuerung

Publications (1)

Publication Number Publication Date
WO2019197998A1 true WO2019197998A1 (fr) 2019-10-17

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ID=67991690

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2019/052930 WO2019197998A1 (fr) 2018-04-09 2019-04-09 Corps d'enroulement pour machine électrique

Country Status (2)

Country Link
DE (1) DE102018010048A1 (fr)
WO (1) WO2019197998A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111262396B (zh) * 2019-11-12 2021-08-20 珠海格力电器股份有限公司 一种电机接地结构及电机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002061772A1 (fr) * 2001-02-02 2002-08-08 Abb Ab Enroulement d'induction
DE102004006712A1 (de) 2004-02-11 2005-09-08 Tyco Electronics Amp Gmbh Spulenkörper für einen elektromechanischen Aktor
WO2012162435A2 (fr) * 2011-05-23 2012-11-29 Active Power, Inc. Système d'isolation pour la prévention d'une décharge par effet couronne

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002061772A1 (fr) * 2001-02-02 2002-08-08 Abb Ab Enroulement d'induction
DE102004006712A1 (de) 2004-02-11 2005-09-08 Tyco Electronics Amp Gmbh Spulenkörper für einen elektromechanischen Aktor
WO2012162435A2 (fr) * 2011-05-23 2012-11-29 Active Power, Inc. Système d'isolation pour la prévention d'une décharge par effet couronne

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Publication number Publication date
DE102018010048A1 (de) 2019-10-10

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