EP0874377A2 - Transformateur à configuration d'enroulement coaxiale - Google Patents

Transformateur à configuration d'enroulement coaxiale Download PDF

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Publication number
EP0874377A2
EP0874377A2 EP98106593A EP98106593A EP0874377A2 EP 0874377 A2 EP0874377 A2 EP 0874377A2 EP 98106593 A EP98106593 A EP 98106593A EP 98106593 A EP98106593 A EP 98106593A EP 0874377 A2 EP0874377 A2 EP 0874377A2
Authority
EP
European Patent Office
Prior art keywords
coaxial
conductor
transformer according
winding
transformer
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Withdrawn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
EP98106593A
Other languages
German (de)
English (en)
Other versions
EP0874377A3 (fr
Inventor
Lothar Dr.-Ing. Heinemann
Harry Dr.-Ing. Reinold
Michael Dipl.-Ing. Steiner
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.)
Mercedes Benz Group AG
Original Assignee
ABB Daimler Benz Transportation Schweiz AG
ABB Daimler Benz Transportation Technology 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 Daimler Benz Transportation Schweiz AG, ABB Daimler Benz Transportation Technology GmbH filed Critical ABB Daimler Benz Transportation Schweiz AG
Publication of EP0874377A2 publication Critical patent/EP0874377A2/fr
Publication of EP0874377A3 publication Critical patent/EP0874377A3/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Withdrawn legal-status Critical Current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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/303—Clamping coils, windings or parts thereof together
    • 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
    • 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
    • H01F27/2823—Wires
    • H01F2027/2833—Wires using coaxial cable as wire

Definitions

  • the invention relates to a transformer with a coaxial winding arrangement according to the preamble of claim 1.
  • the invention can for example to create a medium frequency transformer for electric rail vehicles be used.
  • the proposed coaxial transformers with segmented winding exist consistently from a coaxial arrangement, the big manufacturing problems poses. Especially when there is a high insulation voltage between primary and Secondary winding must be guaranteed, there is a complicated potting technique for the volume completely enclosed by the outer winding. Cooling the inner winding requires penetrations through the coaxial arrangement, that clearly disturb the field symmetries.
  • the advantages of segmented Winding compared to the non-segmented winding are in a better one Utilization of the winding window for number of turns greater than one and in one arbitrary selectable ratio for the transformer.
  • the invention has for its object a transformer with a coaxial winding arrangement of the type mentioned at the beginning, the manufacturing technology is easy to manufacture and has very good electrical properties.
  • connection technology is that the field symmetries which can in principle be achieved by the transformer with a coaxial winding arrangement and planar connection technology are achieved by the Transformer heads "connection technology are not disturbed. Since the proposed planar connectors have similar high-frequency properties as the coaxial winding arrangements, all advantages of the coaxial transformer - such as high insulation strength through electrical field symmetry, extremely low current displacement effects through magnetic field symmetry, very low leakage inductance and very low power-to-weight ratio - are retained .
  • the power to weight ratio is less than 1/10 kg / kW Frequency of 8 kHz.
  • Planar connectors are very easily accessible - possible as a cooling duct.
  • d. H. the largest part of the winding losses occurs in the inner coaxial conductor, because there is less conductor cross-section available for this winding than for the outer winding, d. H. the outer coaxial conductor.
  • the volume easily accessible through the laterally open planar connectors Simply shed insulation material between the primary and secondary windings.
  • Fig. 1 is the view of the top of a non-segmented coaxial transformer shown.
  • the coaxial transformer 1 has a plurality of individual ones in parallel coaxial winding arrangements 2 arranged next to one another.
  • the number of turns w is one.
  • the transmission ratio ü is one, for example.
  • Each Coaxial winding arrangement 2 has an inner coaxial conductor 3 and an outer one Coaxial conductor 4.
  • the inner coaxial conductor 3 and outer coaxial conductor 4 from two adjacent coaxial winding arrangements 2 are via a planar connector 6 connected to each other, but with two coaxial winding arrangements 2 are not connected to such planar connectors 6, but to form Primary winding connections 13 and secondary winding connections 14 serve.
  • the Primary winding connections 13 are with the outer coaxial conductors 4 and the secondary winding connections 14 connected to the inner coaxial conductors 3.
  • the each located between the coaxial winding arrangements 2 and enclosing them Iron cores (stacks of toroidal cores) are marked with number 5.
  • FIG 2 shows the view of the underside of the coaxial transformer 1. It are in particular the two adjacent coaxial winding arrangements to recognize interconnecting planar connector 6.
  • a planar connector for the coaxial transformer is shown, namely in left part of the picture a view of the underside, in the right part of the picture a view a lateral cross-section on the top and in the middle section of the image.
  • the planar connector 6 has an outer Connection rail 7 and an inner connection rail 8, the outer Connection rail 7 via a connection point (flange) 9 with the inner Coaxial conductor 3 and the inner connecting rail 8 via a connecting flange 10 is connected to the outer coaxial conductor 4.
  • the connections are preferably made over sleeves (flanges), which, for example, with the coaxial conductors are soldered and screwed to the connecting rails.
  • the inner coaxial conductor 3 to the outer connecting rail 7 are the inner connecting rails 8 provided with openings 11.
  • To local field strength increases To prevent the connecting flanges 10 are conical and the edges of the outer connecting rail 7 and the inner connecting rail 8 each as Round edges 12 formed.
  • the view of the underside in the left-hand section of FIG. 3 shows the inner connecting rail 8 with the openings 11.
  • the inner and outer coaxial conductors 3, 4 are not yet attached.
  • the view of the top in the right section shows the outer connecting bar 7.
  • the inner and outer coaxial conductors 3, 4 are also not yet attached.
  • a simplified embodiment of a planar connector results from the use of double-sided board layouts, which are used for smaller ones Current loads up to a few 100 A can be used.
  • the external coaxial conductors 4 can be made from local field strength increases be expanded conically at the connection points.
  • Fig. 4 the view of the top of an alternative, is also not segmented coaxial transformer (first variant) shown.
  • this coaxial transformer 1 are the coaxial winding arrangements 2 in two parallel, rows arranged opposite one another, with a large number in each row of coaxial winding arrangements 2 is parallel to each other. Every row is enclosed by an iron core 15, 16.
  • the two at the end of each row, diagonally opposite coaxial winding arrangements 2 are used to form primary winding connections and secondary winding connections and are therefore not connected to planar connectors.
  • the others, themselves each coaxially opposite coaxial winding arrangements 2 are over Planar connector 6 connected together.
  • the number of turns w is nine.
  • the gear ratio For example, ü is one.
  • FIG. 5 is a view of the underside of the alternatively designed coaxial transformer 1 '(first variant) shown. As can be seen, they are each direct opposite coaxial winding arrangements 2 of the two rows connected to each other via planar connector 6.
  • FIG. 6 shows the side view of the coaxial transformer 1 '(first variant).
  • the two iron cores 15, 16 can be seen, which are the two rows enclose with the coaxial winding arrangements 2.
  • the inner coaxial conductors 3 and outer coaxial conductor 4 of the coaxial winding arrangements 2 are over the outer connecting rails 7 and inner connecting rails 8 of the planar connector 6 connected. Adjacent planar connectors are preferred vertically offset.
  • Fig. 7 there is a view (in a sectional view) in the upper section of the image and in the lower Image section a lateral section through a coaxial transformer 1 '' segmented winding arrangement (second variant) shown.
  • the inner coaxial conductor 3 ′′ and the outer coaxial conductor 4 '' composed of several individual segments 22.
  • the number of turns w is four.
  • the transmission ratio ü is one, for example.
  • the coaxial transformer 1 ′′ has two parallel to each other arranged coaxial winding arrangements 2 '', each of these winding arrangements enclosed by an iron core 17, 18 (preferably ring cores) is, the segments are offset by 45 °, which is the connection technology relieved by the planar connector. Is between the two coaxial conductors 3 ", 4" electrical insulation 19 is introduced in each case.
  • the inner surface of the inner Coaxial conductors 3 ′′ are provided with electrical insulation 21, which means that Inner channels of this inner coaxial conductor as cooling channels 20 using Process water can be used as a coolant.
  • the between two iron cores 17, 18 recognizable black areas represent a section of a connecting rail a planar connector.
  • the sectional view in the lower section of FIG. 7 shows in particular the Connection of the two coaxial winding arrangements with the connecting rails a 6 '' planar connector.
  • the segments of the outer coaxial conductor 4 '' are via connection points 10 '' with the current paths of the inner connecting rail 8 '' connected.
  • connection point 10 '' (as well the junction 10 in Fig. 3) are conical to local electrical Avoid increases in field strength.
  • the segments are the same inner coaxial conductor 3 '' via connection points 9 '' with the current paths of the outer Connection rail 7 '' connected.
  • an electrical insulation 24 is provided, the by potting the easily accessible planar connector that is open on the side Volume can be introduced.
  • the cooling channels 20 can be (not shown) Connection piece to be provided to a coolant circuit to achieve the coaxial transformer and thus the one produced in the coaxial transformer Transport heat energy to an external dry cooler.
  • each connecting bar has a plurality of current paths 23 for the connection with the individual segments 22 of the coaxial conductor. Since in the embodiment each coaxial conductor is divided into four segments, there are four current paths per connecting rail intended. A is used to form the winding connections Current path separated and the two sections are with electrical connections Mistake. In the left-hand section of FIG. 8, the resultant ones are exemplified Secondary winding terminals 14 shown.
  • the 45 ° rotation of the segmented winding arrangements allows use a mirror-symmetrical planar connector for the opposite side, here a current path of the inner connecting bar 8 ′′ for forming the winding connections the primary winding is separated as an example.
  • the inner coaxial conductors of the coaxial transformers are also, for example 1, 2, 4 to 6 can be used as cooling channels.
  • curved Tube connectors become the inner coaxial conductors arranged side by side interconnected, creating a continuous coolant line with a Supply nozzle and a discharge nozzle are created.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Communication Cables (AREA)
EP98106593A 1997-04-25 1998-04-09 Transformateur à configuration d'enroulement coaxiale Withdrawn EP0874377A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19717554A DE19717554A1 (de) 1997-04-25 1997-04-25 Transformator mit koaxialer Wicklungsanordnung
DE19717554 1997-04-25

Publications (2)

Publication Number Publication Date
EP0874377A2 true EP0874377A2 (fr) 1998-10-28
EP0874377A3 EP0874377A3 (fr) 1999-05-06

Family

ID=7827771

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98106593A Withdrawn EP0874377A3 (fr) 1997-04-25 1998-04-09 Transformateur à configuration d'enroulement coaxiale

Country Status (2)

Country Link
EP (1) EP0874377A3 (fr)
DE (1) DE19717554A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100015065A1 (it) * 2021-06-09 2022-12-09 Rgm S P A Trasformatore ad alta frequenza con dissipazione termica migliorata

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10058080A1 (de) * 2000-11-23 2002-06-06 Daimlerchrysler Rail Systems Mittelfrequenztransformator

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222016A (en) * 1977-10-05 1980-09-09 Endress U. Hauser Gmbh U. Co. High frequency transformer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176335A (en) * 1977-10-25 1979-11-27 Burroughs Corporation Electrical conducting apparatus
US4159457A (en) * 1977-10-25 1979-06-26 Burroughs Corporation Low voltage high current transformer
AT366203B (de) * 1979-07-04 1982-03-25 Aichholzer Gerhard Dr Einphasentransformator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222016A (en) * 1977-10-05 1980-09-09 Endress U. Hauser Gmbh U. Co. High frequency transformer

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
KLONTZ K W ET AL: "AN ACTIVELY COOLED 120-KW COAXIAL WINDING TRANSFORMER FOR FAST CHARGING ELECTRIC VEHICLES" IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, Bd. 31, Nr. 6, 1. November 1995, Seiten 1257-1263, XP000550009 *
RAULS M S ET AL: "MULTITURN HIGH-FREQUENCY COAXIAL WINDINF POWER TRANSFORMERS" IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, Bd. 31, Nr. 1, 1. Januar 1995, Seiten 112-118, XP000503153 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100015065A1 (it) * 2021-06-09 2022-12-09 Rgm S P A Trasformatore ad alta frequenza con dissipazione termica migliorata
WO2022259273A1 (fr) * 2021-06-09 2022-12-15 RGM s.r.l. Transformateur haute fréquence à dissipation de chaleur améliorée

Also Published As

Publication number Publication date
EP0874377A3 (fr) 1999-05-06
DE19717554A1 (de) 1998-10-29

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