EP0459326A1 - Bobine de self refroidie par liquide - Google Patents

Bobine de self refroidie par liquide Download PDF

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Publication number
EP0459326A1
EP0459326A1 EP91108501A EP91108501A EP0459326A1 EP 0459326 A1 EP0459326 A1 EP 0459326A1 EP 91108501 A EP91108501 A EP 91108501A EP 91108501 A EP91108501 A EP 91108501A EP 0459326 A1 EP0459326 A1 EP 0459326A1
Authority
EP
European Patent Office
Prior art keywords
choke coil
resin body
coil according
cast resin
coolant
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.)
Granted
Application number
EP91108501A
Other languages
German (de)
English (en)
Other versions
EP0459326B1 (fr
Inventor
Heinrich Dr. Baumann
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.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0459326A1 publication Critical patent/EP0459326A1/fr
Application granted granted Critical
Publication of EP0459326B1 publication Critical patent/EP0459326B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01F27/10—Liquid cooling
    • 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
    • H01F27/2876—Cooling

Definitions

  • the invention relates to a liquid-cooled choke coil with a winding embedded in a cast resin body and is preferably used for use in converter systems, non-ionized water being used as a coolant.
  • Such a liquid-cooled choke coil is known from DE 37 43 222 A1.
  • the coil is arranged and sealed in a circular ring container made of non-magnetic material, with grommets attached to the container cover to provide the electrical supply lines.
  • This arrangement of the coil in a closed annulus makes it impossible for the cooling water to come into direct contact with the live winding.
  • the invention has for its object to provide a liquid-cooled choke coil of the type mentioned, which intensive heat transfer to the Guaranteed coolant and still no electrically insulating coolant must be used.
  • non-deionized, ie, electrically conductive water can be used as the coolant.
  • the water is kept isolated from the electrical components by embedding the winding in electrically insulating casting resin and using electrically insulating cooling pipes. Nevertheless, the heat transfer to the water is not hindered, since the cooling pipes can be arranged directly next to the conductors that generate heat.
  • the use of water as a coolant is advantageous for reasons of fire protection and environmental protection, especially in the case of high-performance converters for means of transport.
  • the winding of the choke coil is designed like a spiral coil; the head of this winding is designated by number 1.
  • This conductor 1 can be made solid or consist of a braided or screwed strand.
  • the conductor 1 can also be bare or yarn-wound.
  • the winding is embedded in a disk-shaped cast resin body 2.
  • the inner end of the winding is connected via a cable lug 11 (or clamping piece) to a metallic rail 3 extending laterally out of the cast resin body 2.
  • This rail 3 is made of copper, aluminum or another electrically highly conductive material and is cranked accordingly so that it can be guided around the coil to the outside.
  • the connection of the rail 3 to the inner end of the coil 1 is preferably done by soldering or squeezing the conductor 1 to the cable lug 11 of the rail 3.
  • the end of the rail 3 protruding from the cast resin body 2 is freely accessible as an electrical connection 17 (plug connection).
  • the outer end of the winding is connected via a cable lug 12 (or clamping piece) directly to an electrical connection 18 protruding from the cast resin body 2 (plug connection), preferably also by soldering or squeezing.
  • the electrical connections 17 of the rails 3 and 18 of the cable lug 12 emerge laterally from the cast resin body 2 and can be contacted in a simple manner with external electrical connections.
  • cooling tubes 5 are arranged parallel to the coil axis at predetermined intervals. These cooling tubes 5 preferably have an outer rectangular cross section with a longitudinal bore of circular or also rectangular cross section. The cooling tubes 5 serve as a spacer between the spirals of the conductor 1 before the casting of the coil and after the casting, i.e. during operation of the choke coil, for cooling it.
  • the cooling tubes 5 can be made from plastic, ceramic or preferably from an electrically insulating but good heat-conducting ceramic, such as beryllium oxide or in particular aluminum nitride.
  • the production of the cooling tubes 5 from an electrically insulating material allows the use of electrically conductive coolants, preferably non-deionized water or a water-glycol mixture.
  • the distance of the cooling tubes 5 from one another in the circumferential direction depends on the heat loss flow to be dissipated from the windings.
  • the pre-assembled unit consisting of the winding (conductor 1), rail 3, cable lugs 11, 12 and cooling tubes 5 is cast with casting resin, so that the essentially disk-shaped casting resin body 2 is formed, which in the axial direction is formed by the cooling tubes 5 existing holes and from on a hole circle along the outer edge arranged holes 7 is broken.
  • the holes 7 are used to fasten the cast resin body 2 with lids, as described under Fig. 2 (screw connections).
  • FIG. 2 shows a section through a complete choke coil according to a first variant with covers and coolant connections.
  • the disc-shaped cast resin body 2 with embedded spiral-shaped conductor 1, the inner cable lug 11, the rail 3 with electrical connection 17 and a cooling tube 5 can be seen (only one cooling tube being drawn in to simplify the illustration). Furthermore, the cable lug 12 with electrical connection 18 are indicated.
  • Lids 4, 6 are attached to the cast resin body 2 on both sides, screws 10 being guided through the holes 7 on the edge of the cast resin body 2 and through corresponding holes 8, 9 in the covers 4, 6 for connection.
  • the covers 4, 6 are designed in such a way that a disk-shaped cavity 19 or 20 is formed between the covers 4 and 6 and the cast resin body 2 in the assembled state of the choke coil.
  • the parting line 21 or 22 between the cover 4 and the cast resin body 2 or between the cover 6 and the cast resin body 2 is made permanent and secure in a suitable manner - for example by an O-ring inserted in a corresponding groove, a flat seal or by gluing sealed so that leakage of coolant is prevented.
  • a coolant connection 13, 14 is attached in each case, which is glued or soldered into a hole 15, 16 in the cover, or onto a other suitable way is connected to this.
  • the coolant connections 13, 14 can also be made from one part together with the covers 4, 6.
  • the coolant inflow, the coolant flow within the throttle coil and the coolant outflow are indicated in FIG. 2 by arrows, wherein the coolant can also flow in the opposite direction.
  • the coolant is supplied to the cavity 19 via the coolant connection 13, from where it is distributed to the individual cooling tubes 5.
  • the coolant connection 13 When flowing through the cooling tubes 5, it absorbs the heat accumulating in conductors 1 of the coil, collects in cavity 20 and is dissipated via the coolant connection 14.
  • FIG. 3 shows a top view of a choke coil according to a second variant, the upper cover being cut open.
  • the upper cover 27 is provided with radial ribs 23 and the lower cover 28 (see FIG. 4) with radial ribs 24, the ribs 23 and 24, in the assembled state of the choke, the disc-shaped cavities 19 and Subdivide 20 into sectors, whereby a plurality of cover chambers 25 and 26 (see FIGS. 4 and 5) are created.
  • the covers 27, 28 are attached to the disk-shaped cast resin body 2 offset by half a rib pitch in the circumferential direction.
  • the cooling tubes 5 are arranged in cast resin body 2 so that the areas in which cast resin body 2 and radial ribs 23, 24 of the cover 27, 28 are in contact are left out.
  • diametrically opposed coolant connections 29, 30 are arranged in a suitable manner, whereas the cover 28 has no coolant connections (see also FIG. 4).
  • This design causes a multiple deflection of the coolant in the sector-shaped cover chambers 25, 26.
  • the cast resin body 2 is flowed through by coolant several times, whereby a higher flow rate and thus a higher heat transfer coefficient is achieved with unchanged volume flow of the coolant.
  • FIG. 5 in which the sector-shaped cover chambers formed in the choke coil according to the second variant are shown.
  • the cover chambers A, B, E, G, ( cover chamber 25) formed by the radial ribs 23 of the upper cover 27 and in the lower part of FIG. 5, those formed by the radial ribs 24 of the lower cover 28
  • the coolant connection 29 opens into the cover chamber A and the coolant connection 30 into the cover chamber E.
  • the coolant is fed to the upper cover chamber A via the coolant connection 29 and flows through the cooling pipes 5 from chamber A into the lower chambers B and F.
  • FIG 4 shows a section through the choke coil according to the second variant.
  • the cast resin body 2 with the upper cover 27 and lower cover 28 can be seen.
  • the radial ribs 23, 24 form cover chambers 25, 26.
  • the coolant connections 29, 30 are shown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP91108501A 1990-06-01 1991-05-25 Bobine de self refroidie par liquide Expired - Lifetime EP0459326B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4017750 1990-06-01
DE4017750A DE4017750A1 (de) 1990-06-01 1990-06-01 Fluessigkeitsgekuehlte drosselspule

Publications (2)

Publication Number Publication Date
EP0459326A1 true EP0459326A1 (fr) 1991-12-04
EP0459326B1 EP0459326B1 (fr) 1995-05-03

Family

ID=6407665

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91108501A Expired - Lifetime EP0459326B1 (fr) 1990-06-01 1991-05-25 Bobine de self refroidie par liquide

Country Status (2)

Country Link
EP (1) EP0459326B1 (fr)
DE (2) DE4017750A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19738946A1 (de) * 1997-09-05 1999-03-18 Siemens Ag Drosselspule ohne Kern
DE19810780C1 (de) * 1998-03-06 2000-01-05 Siemens Ag Toroid-Luftspule und Verfahren zum Herstellen einer Toroid-Luftspule
WO2000039817A1 (fr) * 1998-12-29 2000-07-06 Square D Company Procede et appareil de refroidissement de transformateur
US7245197B2 (en) 2004-02-13 2007-07-17 Abb Oy Liquid-cooled choke

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4202021C2 (de) * 1992-01-25 1994-02-17 Abb Patent Gmbh Brauchwassergekühlte Drosselspule
DE102007014360A1 (de) * 2007-03-26 2008-10-02 Abb Technology Ag Abstandhalter für Wicklungen
US11887766B2 (en) * 2020-08-24 2024-01-30 Ge Aviation Systems Llc Magnetic component and method of forming

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1790906A (en) * 1931-02-03 Transformer
CH207256A (de) * 1938-01-27 1939-10-15 Bbc Brown Boveri & Cie Kühlanordnung für die Hochspannungswicklung von Transformatoren.
GB890997A (en) * 1957-12-11 1962-03-07 Licentia Gmbh Choking coil
DE1638566A1 (de) * 1966-05-26 1970-07-09 Skoda Np Drosselspule fuer elektrische Fahrzeuge
DE2032507A1 (de) * 1970-07-01 1972-01-05 Transformatoren Union Ag Transformator mit in Gießharz eingegossenen Wicklungen
CH522943A (de) * 1971-03-31 1972-05-15 Siemens Ag Albis Verfahren zum Einschliessen eines elektrischen Bauteiles in einen gegen Feuchtigkeit schützenden Block
DE2854520A1 (de) * 1978-12-16 1980-06-26 Bbc Brown Boveri & Cie Elektrische spule
US4574261A (en) * 1985-08-23 1986-03-04 Varian Associates, Inc. Bakeable electromagnets
EP0223954A1 (fr) * 1985-10-01 1987-06-03 Siemens Aktiengesellschaft Inductance pour redresseur commandé, en particulier pour installations de transmission de courant continu à haute tension

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3201728A (en) * 1962-08-23 1965-08-17 Westinghouse Electric Corp Evaporative cooled inductive apparatus having cast solid insulation with cooling ducts formed therein
DE3743222A1 (de) * 1987-12-19 1989-06-29 Asea Brown Boveri Gekuehlte drosselspule fuer stromrichteranlagen

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1790906A (en) * 1931-02-03 Transformer
CH207256A (de) * 1938-01-27 1939-10-15 Bbc Brown Boveri & Cie Kühlanordnung für die Hochspannungswicklung von Transformatoren.
GB890997A (en) * 1957-12-11 1962-03-07 Licentia Gmbh Choking coil
DE1638566A1 (de) * 1966-05-26 1970-07-09 Skoda Np Drosselspule fuer elektrische Fahrzeuge
DE2032507A1 (de) * 1970-07-01 1972-01-05 Transformatoren Union Ag Transformator mit in Gießharz eingegossenen Wicklungen
CH522943A (de) * 1971-03-31 1972-05-15 Siemens Ag Albis Verfahren zum Einschliessen eines elektrischen Bauteiles in einen gegen Feuchtigkeit schützenden Block
DE2854520A1 (de) * 1978-12-16 1980-06-26 Bbc Brown Boveri & Cie Elektrische spule
US4574261A (en) * 1985-08-23 1986-03-04 Varian Associates, Inc. Bakeable electromagnets
EP0223954A1 (fr) * 1985-10-01 1987-06-03 Siemens Aktiengesellschaft Inductance pour redresseur commandé, en particulier pour installations de transmission de courant continu à haute tension

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 27 (E-294)(1750) 06 Februar 1985, & JP-A-59 172222 (TOSHIBA K.K.) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19738946A1 (de) * 1997-09-05 1999-03-18 Siemens Ag Drosselspule ohne Kern
DE19738946C2 (de) * 1997-09-05 2000-10-26 Siemens Ag Drosselspule ohne Kern
DE19810780C1 (de) * 1998-03-06 2000-01-05 Siemens Ag Toroid-Luftspule und Verfahren zum Herstellen einer Toroid-Luftspule
WO2000039817A1 (fr) * 1998-12-29 2000-07-06 Square D Company Procede et appareil de refroidissement de transformateur
US7245197B2 (en) 2004-02-13 2007-07-17 Abb Oy Liquid-cooled choke

Also Published As

Publication number Publication date
DE59105361D1 (de) 1995-06-08
EP0459326B1 (fr) 1995-05-03
DE4017750A1 (de) 1991-12-05

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