EP2704167A1 - Bobine à noyau toroïdal et transducteur équipé d'un tel noyau toroïdal - Google Patents

Bobine à noyau toroïdal et transducteur équipé d'un tel noyau toroïdal Download PDF

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Publication number
EP2704167A1
EP2704167A1 EP12182582.2A EP12182582A EP2704167A1 EP 2704167 A1 EP2704167 A1 EP 2704167A1 EP 12182582 A EP12182582 A EP 12182582A EP 2704167 A1 EP2704167 A1 EP 2704167A1
Authority
EP
European Patent Office
Prior art keywords
winding
core
partial
layer
windings
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Withdrawn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
EP12182582.2A
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German (de)
English (en)
Inventor
Christian Kovacs
Wolfgang Weidner
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
Priority to EP12182582.2A priority Critical patent/EP2704167A1/fr
Publication of EP2704167A1 publication Critical patent/EP2704167A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • H01F27/2895—Windings disposed upon ring cores
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H01F38/30—Constructions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H01F38/30—Constructions
    • H01F2038/305—Constructions with toroidal magnetic core

Definitions

  • the invention relates to a toroidal core winding according to the preamble of patent claim 1 and a transducer with such a toroidal core winding.
  • Toroidal windings are often used as transducers, toroidal transformers or toroidal core chokes. Windings are applied via an annular core of magnetizable material. Between winding and ring core is doing an insulation layer for electrical insulation. The windings are usually made of an insulated wire or ribbon. Frequently, such toroidal windings are used as a secondary winding in current transformers. The number of turns around the toroidal core depends on the desired gear ratio. One turn is a once around the toroidal guided wire or ribbon loop.
  • toroidal windings in which the windings are distributed over the entire core circumference of the toroidal core. If only one part of the required windings can be arranged in one layer, then the windings are arranged one above the other in several layers.
  • a first layer is initially wound over the entire core circumference directly wound on the core insulation.
  • Another layer is then optionally wound with an intermediate layer of insulating material on the first layer.
  • Other layers can follow until the desired number of turns is reached.
  • the total voltage drop of the winding is now distributed over the number of layers. Between two layers, that is to say between two superimposed turns of directly adjacent layers, the L-th part of the voltage applied across the entire winding now drops when the entire winding is wound in L layers. This voltage is also referred to as layer voltage.
  • Insulation layers for example, of an electrically insulating film or paper are inserted between two layers in order to ensure the dielectric strength against flashovers between two layers. This makes the production of such toroidal windings, especially those which are intended for use in high-voltage systems, consuming and leads to larger diameters of the windings.
  • the present invention has for its object to provide a toroidal core winding and a transducer with such a toroidal winding, which have a high dielectric strength in compact dimensions.
  • the object to the toroidal winding related object is achieved by the means of the invention according to claim 1.
  • the toroidal core winding on an annular, magnetizable core and a winding of a winding wire has a plurality of partial windings which are arranged in a sector-shaped manner around the core.
  • Each partial winding has several layers, each with a plurality of turns per layer.
  • adjacent partial windings are directly connected by the winding wire.
  • the winding is thus continuous, so wound without interruption from the winding wire.
  • Each partial winding is wound around a sector-shaped part of the core and connected to the winding wire with the adjacent partial winding, which is wound around an adjacent sector-shaped part of the core.
  • the winding wire consists of an electrical conductor having on its surface an insulating layer, often a paint insulation.
  • the position voltage is reduced in such a toroidal coil over the known toroidal coil to a fraction which is inversely proportional to the number of partial windings.
  • the advantage of this is that the layer tension is thereby reduced so far that can be dispensed with additional insulation between the layers, since the insulating layer of the winding wire has a sufficient dielectric strength against the so reduced Has layer tension.
  • such a toroidal coil has particularly compact dimensions.
  • connection of a partial winding to an adjacent partial winding by the winding wire is designed such that the winding wire thereby connects the outermost layer of a partial winding with the innermost layer of the adjacent partial winding directly. This makes it particularly easy to ensure that the winding can be continued after completion of a part winding without interruption with the next part winding.
  • the layers of the sub-winding are alternately wound in opposite winding directions.
  • the change of the winding wire from one layer to the next layer is particularly simple.
  • insulating means are provided between the partial windings.
  • the insulating means may for example be formed of solid insulating material, or by a corresponding distance is provided between the partial windings, so that the insulation resistance of the surrounding medium, often air, sufficient to achieve the desired dielectric strength.
  • the insulating means are formed by limiting plates of insulating material. Such boundary plates can simultaneously contribute to the mechanical stability of the partial windings during the winding process.
  • holding means are arranged on the core, which prevent slippage of the turns.
  • These holding means are intended in particular to prevent the turns of the respective lowermost layer of a partial winding from slipping when the upper layers are wound thereon become.
  • Such retaining means may be applied to the core rings or clips that limit the lower layer of a sub-winding. But it can also be applied to the core or the core insulation grooves, or a particularly non-slip core insulation.
  • the invention provides to provide a transducer with a toroidal core winding according to the invention.
  • Space requirements and dielectric strength are particularly critical variables for transducers.
  • a provided with a toroidal core winding according to the invention transducer would be both particularly stress-resistant, as well as compact.
  • the transducer while a current transformer.
  • FIGS. 1 to 5 show eight phases in the manufacture of a toroidal core winding, according to the prior art.
  • the phase according to FIG. 1 shows first only the core 2, which is here an iron core. This is ring-shaped and usually has a rectangular or round cross-section.
  • a ply insulation 5 has been wound on the core.
  • the layer insulation 5 is usually a strip of insulating plastic film or paper, which is wound around the core 2 in one or more layers.
  • FIG. 3 shows the first layer of a winding 1 of the toroidal core winding.
  • a winding wire 4 is wound in several turns 4 around the core 1 with the applied layer insulation 5.
  • a winding 4 corresponds to a loop with the winding wire 4 around the core 2 around.
  • a further layer of the layer insulation 5 is wound on the first layer of the winding 1.
  • a second layer 8 of the winding 1 is applied as shown in the FIG. 2 respectively FIG. 3 is shown.
  • the toroidal core winding consists of the core 2 and alternately applied layers of layer insulation 5 and layers of winding wire 4.
  • FIGS. 6 to 15 show different phases in the production of a toroidal core winding according to the invention.
  • the phases according to the FIGS. 6 and 7 correspond to those of FIGS. 1 and 2
  • the phase according to the FIG. 8 shows a completed part winding 10. This was, as in FIG. 9 2, a winding layer 8, that is to say a layer of turns of a winding wire 4, is applied in a winding direction 7 to the layer insulation 5 within a first sector 12. Thereafter, according to FIG. 10 Within the same sector 12, a second winding layer 8 is wound directly onto the first winding layer 8 in a winding direction 7, which is opposite to the winding direction 7 of the first winding layer. A third winding layer 8 is then, as in FIG.
  • the first sector 12 has it a partial winding 10, which has a plurality of layers 8, here three, each with a plurality of turns 9 per layer 8.
  • the winding wire 4 is now guided from the first sector 12 into an adjacent sector 13. He changes from the uppermost layer 8 of the first partial winding 10 in the bottom layer 8 of the second partial winding 11. In FIG. 12 one sees the finished second partial winding 11.
  • a second partial winding 11 corresponding to the first partial winding 10 is wound in a second sector 13.
  • This second part of winding 11 consists of three layers 8, each with a plurality of turns 9 per layer.
  • FIGS. 13 to 15 show how these layers 8 are wound up successively. In this way, further partial windings 14 are wound in the main winding direction 6 on the core 2 until the necessary number of turns 9 is reached.
  • the sectors 12, 13 are bounded by limiting plates 17. These act on the one hand as an insulating means between adjacent part windings and on the other hand as a holding means to prevent slippage of the windings during the winding process.
  • the boundary plates 17 are optional and not necessary part of the toroidal core winding according to the invention.
  • FIG. 16 shows a section through a toroidal core winding according to the invention with a first partial winding 10 in a first sector 12, a second partial winding 11 in a second sector 13 and further partial windings 14 in other sectors 15.
  • Each of the partial windings 10, 11, 14 consists of three layers 8 with in each case seven turns 9 of the winding wire 4.
  • the individual layers 8 of the partial windings 10, 11, 14 each have the same number of turns, here seven, but the layers 8 could also have different numbers of turns.
  • the individual layers 8 of a partial winding 10, 11, 14 are here offset from one another, so that the centers of turns 9 superimposed Layers 8 do not lie directly above each other. However, it would also be possible to arrange the turns 9 of adjacent layers 8 directly above one another.
  • the continuous line 16 indicates in the arrow direction the winding order of the turns 9 on the line 16 consecutive turns 9 are thus wound in succession.
  • the individual partial windings 10, 11, 14 are shown spaced apart here for a better overview. This is not absolutely necessary, but can be useful depending on the required dielectric strength. In order to achieve an even better dielectric strength between two partial windings 10, 11, 14, it may also be appropriate to arrange limiting plates 17 between the partial windings 10, 11, 14 as insulating means between the partial windings 10, 11, 14 on the core 2. These would be made of an insulating material and would have an inner diameter and cross-section corresponding to that of the core 2 with ply insulation 5, and an outer diameter and cross-section corresponding in shape and size of the winding 1.
  • first part of the winding 10 and the last part of the winding which are again adjacent, this can be useful, since here is applied between adjacent turns 9 different partial windings practically all of the voltage dropping across the toroidal core winding.
  • first partial winding 10 and the last partial winding could be arranged with a particularly large distance from each other.
  • the layer voltage U L so the maximum voltage that can be applied between two adjacent turns, apart from those of the first and the last partial winding, is exemplified in two places.
  • the layer voltage U ' L U / L. Accordingly, the layer voltage U L for an inventive Ring core winding already at three partial windings T significantly reduced compared to the layer tension U ' L according to the prior art.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
EP12182582.2A 2012-08-31 2012-08-31 Bobine à noyau toroïdal et transducteur équipé d'un tel noyau toroïdal Withdrawn EP2704167A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12182582.2A EP2704167A1 (fr) 2012-08-31 2012-08-31 Bobine à noyau toroïdal et transducteur équipé d'un tel noyau toroïdal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12182582.2A EP2704167A1 (fr) 2012-08-31 2012-08-31 Bobine à noyau toroïdal et transducteur équipé d'un tel noyau toroïdal

Publications (1)

Publication Number Publication Date
EP2704167A1 true EP2704167A1 (fr) 2014-03-05

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EP12182582.2A Withdrawn EP2704167A1 (fr) 2012-08-31 2012-08-31 Bobine à noyau toroïdal et transducteur équipé d'un tel noyau toroïdal

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EP (1) EP2704167A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021023115A1 (fr) * 2019-08-02 2021-02-11 登高电气有限公司 Ensemble bobine de transformateur de courant et procédé de fabrication

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH599668A5 (en) * 1975-12-19 1978-05-31 Siemens Ag Bush type current transformer
US4683919A (en) * 1984-10-17 1987-08-04 Kuhlman Corporation Apparatus and method for fabricating a high voltage winding for a toroidal transformer
US6300857B1 (en) * 1997-12-12 2001-10-09 Illinois Tool Works Inc. Insulating toroid cores and windings

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH599668A5 (en) * 1975-12-19 1978-05-31 Siemens Ag Bush type current transformer
US4683919A (en) * 1984-10-17 1987-08-04 Kuhlman Corporation Apparatus and method for fabricating a high voltage winding for a toroidal transformer
US6300857B1 (en) * 1997-12-12 2001-10-09 Illinois Tool Works Inc. Insulating toroid cores and windings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021023115A1 (fr) * 2019-08-02 2021-02-11 登高电气有限公司 Ensemble bobine de transformateur de courant et procédé de fabrication

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