EP4116995A1 - Bobine d'inductance électrique - Google Patents

Bobine d'inductance électrique Download PDF

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Publication number
EP4116995A1
EP4116995A1 EP21184723.1A EP21184723A EP4116995A1 EP 4116995 A1 EP4116995 A1 EP 4116995A1 EP 21184723 A EP21184723 A EP 21184723A EP 4116995 A1 EP4116995 A1 EP 4116995A1
Authority
EP
European Patent Office
Prior art keywords
choke
capillary layer
capillary
strip
electrical
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Withdrawn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
EP21184723.1A
Other languages
German (de)
English (en)
Inventor
Vladimir Danov
Klaus Dennerlein
Hans-Peter KRÄMER
Manfred Wohlfart
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 EP21184723.1A priority Critical patent/EP4116995A1/fr
Publication of EP4116995A1 publication Critical patent/EP4116995A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01F27/08—Cooling; Ventilating
    • H01F27/22—Cooling by heat conduction through solid or powdered fillings
    • 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
    • H01F27/2847—Sheets; Strips

Definitions

  • the invention relates to an electrical choke according to the preamble of patent claim 1, a method for producing an electrical choke according to the preamble of patent claim 12 and a method for operating an electrical choke according to the preamble of patent claim 14.
  • Electrical chokes are inductances, for example coils, which are used to limit currents in electrical lines, for buffer storage, for impedance matching or for filtering.
  • electrical chokes typically consist of a wound wire with or without a magnetic core.
  • electrical chokes are air-cooled.
  • chokes with high power density are required.
  • liquid-cooled chokes are used for such applications.
  • the object of the present invention is to provide an improved liquid-cooled electrical choke.
  • the electrical choke according to the invention comprises at least one wound electrically conductive band and is characterized in that a capillary layer for capillary guidance of a cooling liquid is arranged at least in a partial area between at least two layers of the wound band.
  • the choke according to the invention has a wound strip with several layers.
  • the tape is wound in multiple layers.
  • the capillary layer according to the invention is arranged at least in a partial area between at least two layers, preferably between in each case two layers of the winding.
  • the capillary layer is arranged in a partial area between two opposite sides of the tape.
  • the capillary layer is particularly preferably arranged between all layers of the winding.
  • the winding has a first and second layer, the first layer being formed by the electrically conductive tape and the second layer being formed by the capillary layer.
  • the capillary layer is designed for capillary guidance of the coolant. This forms an advantageous direct liquid cooling of the electrical choke. Due to its capillary forces, the capillary layer guides the cooling liquid into the partial areas between the layers of the winding, so that the electrical inductor can be cooled efficiently. In particular, the capillary layer enables efficient cooling of the internal areas of the throttle. In addition, due to its arrangement between the layers, the capillary layer has a large area overlap with the wound band of the choke, so that an advantageous and efficient heat transfer from the current-conducting band to the cooling liquid within the capillary layer is made possible.
  • the electrical choke according to the invention thus has a higher power density.
  • the throttle according to the invention can be manufactured inexpensively.
  • capillary layer forms a spacer between the layers of the winding. Additional spacers are therefore not required, but can be provided.
  • the inventive method for manufacturing (manufacturing method) an electric reactor according to the present invention and/or one of its modifications is characterized in that the capillary layer is wrapped together with the electrically conductive tape.
  • the method according to the invention for operating (operating method) an electrical choke according to the present invention and/or one of its configurations is characterized in that the capillary layer is at least partially immersed in a cooling liquid.
  • the capillary layer is advantageously saturated with the cooling liquid due to its capillary effect, so that advantageous cooling is made possible right into the interior of the throttle.
  • the entire electrical choke is particularly preferably immersed in the cooling liquid during its operation, comparable to bath cooling.
  • the tape is wound in several layers together with the capillary layer in the manner of a snail.
  • the winding preferably takes place in a snail-like manner.
  • a snail shape is formed for the electrical choke, which is particularly compact and easy to produce.
  • the capillary layer can first be placed and/or applied to the tape. The tape and the capillary layer laid on it are then at least partially rolled up or wound into a snail.
  • the choke wound with the capillary layer in this way thus has the shape of a snail or a cinnamon bun, with the capillary layer being arranged between each two layers of the wound strip.
  • the capillary layer thus separates two layers of the electrical choke.
  • the choke has a first and second layer, the first layer being formed by the band and the second layer being formed by the capillary layer.
  • the layers extend, comparable to a spiral (snail line), essentially in the azimuthal direction, with the various layers following one another regularly in the radial direction.
  • the capillary layer comprises a plastic mesh.
  • the capillary layer is particularly preferably designed as a plastic mesh.
  • the plastic mesh forms a stable and efficient spacer between the layers of wound tape.
  • the plastic mesh thus forms the second layer of the winding.
  • the plastic mesh can be wrapped particularly efficiently when the choke is manufactured.
  • Another advantage of the plastic mesh is that it allows for a spacing of less than or equal to one millimeter between the layers of tape. This is the case because sufficient capillary forces develop here so that the cooling liquid can penetrate between the layers due to its capillary transport by means of the capillary layer.
  • the edges of the plastic mesh are arranged one above the other.
  • the plastic mesh is typically formed by several plastic fibers or edges. For sufficiently high capillary forces, it is advantageous here if these are arranged one above the other within the plastic mesh. In other words, an advantageous capillary structure is formed by the protruding edges of the plastic mesh.
  • the band has a coating, with the capillary layer being formed by the coating.
  • the capillary structure advantageously provides an improved capillary structure.
  • this allows the capillary structure to be applied directly to the strip as a coating.
  • the capillary layer is formed by a surface coating of the tape.
  • the electrically conductive strip can be additionally coated, for example for electrical insulation.
  • the capillary layer comprises a felt.
  • the capillary layer is particularly preferably formed by a felt.
  • An advantageous capillary structure is provided by using a felt.
  • the strip is designed as an aluminum strip.
  • aluminum has high electrical and thermal conductivity.
  • a high power density of the choke can be achieved as a result, particularly in connection with bath cooling.
  • the aluminum strip can be insulated by the capillary layer, in particular if this is in the form of a coating. This is no anodizing of the aluminum strip required.
  • the aluminum strip can be anodized.
  • the band has a thickness of at least 0.5 millimeters and at most 1.0 millimeters.
  • the distance between the layers of the wound tape is less than or equal to 1.0 millimeters.
  • the distances between the layers of the tape can advantageously be small, ie less than or equal to 1.0 millimeter. This advantageously enables a compact choke and thus a high power density.
  • the capillary layer includes the cooling liquid.
  • the cooling liquid is particularly preferably electrically non-conductive and has an insulation capacity of greater than or equal to 40 kilovolts per millimeter. As a result, the distance between the layers of the tape can be less than one millimeter. The conductivity of the choke is therefore no longer decisive for the cooling.
  • the coolant comprises a fluoroketone.
  • a non-conductive liquid particularly preferably a fluoroketone
  • the coolant is therefore particularly preferably a fluoroketone, in particular a fluoroketone with the trade name Novec TM .
  • anodizing of the strip, in particular the aluminum strip can be dispensed with as a result.
  • FIGURE shows an electrical choke according to one embodiment of the present invention in a schematic manner.
  • the figure shows an electrical choke 1 according to an embodiment of the present invention.
  • the electric choke 1 is designed in the shape of a snail.
  • the snail shape or the choke 1 has several layers 21, 22 due to its winding.
  • the layers 21, 22 are formed by an aluminum strip 2.
  • the aluminum strip 2 forms a first layer of the electrical choke 1 .
  • the choke 1 comprises a capillary layer 42 which forms a second layer of the choke 1 .
  • the capillary layer 42 is preferably formed by a plastic mesh with overhanging edges.
  • the capillary layer 42 enables capillary transport or capillary guidance of a cooling liquid. As a result, the cooling liquid is guided between the layers 21, 22 into the interior of the choke 1, so that a high power density is made possible due to the efficient cooling and the compact design of the choke 1.
  • the aluminum strip 2 and the capillary layer 42 can be wound together.
  • the capillary layer 42 is also wrapped.
  • the capillary layer 42 also forms a spacer for the layers 21, 22 of the aluminum strip 2, so that no further spacers are required.
  • the throttle 1 For the operation of the throttle 1, it is at least partially immersed in a bath with cooling liquid. Most preferably, this is immersed in a fluoroketone. As a result, the capillary layer between the layers 21, 22 of the throttle fills with coolant due to their capillary forces.
  • the aluminum strip 2 is energized for the operation of the choke 1 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformer Cooling (AREA)
EP21184723.1A 2021-07-09 2021-07-09 Bobine d'inductance électrique Withdrawn EP4116995A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21184723.1A EP4116995A1 (fr) 2021-07-09 2021-07-09 Bobine d'inductance électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21184723.1A EP4116995A1 (fr) 2021-07-09 2021-07-09 Bobine d'inductance électrique

Publications (1)

Publication Number Publication Date
EP4116995A1 true EP4116995A1 (fr) 2023-01-11

Family

ID=76859470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21184723.1A Withdrawn EP4116995A1 (fr) 2021-07-09 2021-07-09 Bobine d'inductance électrique

Country Status (1)

Country Link
EP (1) EP4116995A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050274540A1 (en) * 2004-06-15 2005-12-15 Smith James D Surface coating of lapped insulation tape
WO2011039417A1 (fr) * 2009-09-30 2011-04-07 Trafotek Oy Procédé pour refroidir un enroulement, système de refroidissement d'enroulement et enroulement refroidi par un liquide
DE112009005222T5 (de) * 2009-09-11 2012-08-30 Abb Research Ltd. Transformator mit einem Wärmerohr
DE112012004191T5 (de) * 2011-10-06 2014-06-26 Autonetworks Technologies, Ltd. Drossel, für eine Drossel verwendete Wicklungskomponente, Wandler und Leistungswandlervorrichtung
CN105826051A (zh) * 2016-05-25 2016-08-03 常熟市常源变压器有限公司 一种变压器用箔绕线圈
US20180322995A1 (en) * 2017-05-02 2018-11-08 General Electric Company Apparatus and method for passive cooling of electronic devices

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050274540A1 (en) * 2004-06-15 2005-12-15 Smith James D Surface coating of lapped insulation tape
DE112009005222T5 (de) * 2009-09-11 2012-08-30 Abb Research Ltd. Transformator mit einem Wärmerohr
WO2011039417A1 (fr) * 2009-09-30 2011-04-07 Trafotek Oy Procédé pour refroidir un enroulement, système de refroidissement d'enroulement et enroulement refroidi par un liquide
DE112012004191T5 (de) * 2011-10-06 2014-06-26 Autonetworks Technologies, Ltd. Drossel, für eine Drossel verwendete Wicklungskomponente, Wandler und Leistungswandlervorrichtung
CN105826051A (zh) * 2016-05-25 2016-08-03 常熟市常源变压器有限公司 一种变压器用箔绕线圈
US20180322995A1 (en) * 2017-05-02 2018-11-08 General Electric Company Apparatus and method for passive cooling of electronic devices

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