EP0043615B1 - Hochspannungstransformator - Google Patents

Hochspannungstransformator Download PDF

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Publication number
EP0043615B1
EP0043615B1 EP19810200697 EP81200697A EP0043615B1 EP 0043615 B1 EP0043615 B1 EP 0043615B1 EP 19810200697 EP19810200697 EP 19810200697 EP 81200697 A EP81200697 A EP 81200697A EP 0043615 B1 EP0043615 B1 EP 0043615B1
Authority
EP
European Patent Office
Prior art keywords
coil
winding
coils
wound
voltage 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.)
Expired
Application number
EP19810200697
Other languages
English (en)
French (fr)
Other versions
EP0043615A1 (de
Inventor
Christiaan A. J. C. Van Der Vleuten
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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 Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Gloeilampenfabrieken NV
Publication of EP0043615A1 publication Critical patent/EP0043615A1/de
Application granted granted Critical
Publication of EP0043615B1 publication Critical patent/EP0043615B1/de
Expired 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
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/18—Rotary transformers
    • 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
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • 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
    • H01F38/42—Flyback transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • H01F2005/022—Coils wound on non-magnetic supports, e.g. formers wound on formers with several winding chambers separated by flanges, e.g. for high voltage applications

Definitions

  • the invention relates to a high-voltage transformer, comprising a ferromagnetic core on which at least one primary winding and one secondary winding are provided, said secondary winding consisting of a plurality of wire-wound cylindrical coils, each successive coil coaxially surrounding the preceding coil and being separated therefrom by a cylindrical insulating member, each pair of successive coils having a given capacitance with respect to each other and being electrically interconnected by a diode, all of said diodes being poled in the same rectifying sense and each coil consisting of a number of series-connected sub-coils, each comprising at least two layers of turns.
  • a high-voltage transformer of this kind is known from Netherlands Patent Application 7713118 (PHN 8970) laid open to public inspection.
  • the division of the coils into sub-coils serves to compose each coil from more than one winding layer, so that either the number of coils constituting the secondary winding (and hence also the number of diodes required) may be smaller or each coil may be shorter, so that the dimensions of the ferromagnetic coil may be smaller.
  • the cost of the transformer is reduced in both cases.
  • the high-voltage transformer in accordance with the invention is characterized in that each coil is wound on a dimensionally stable cylindrical coil former which between successive coils also forms the insulating member, circumferential ridges on the surface of each former defining at least ten winding chambers, in each of which a separate sub-coil is wound.
  • the depth of the winding chambers at the most equals the width.
  • each coil to be separately wound on a coil former of its own without special steps being required during the winding of each sub-coil, after which the coil formers are simply slid into one another.
  • the ridges prevent damaging the windings during this sliding movement.
  • the entire secondary winding can be impregnated with a synthetic material after assembly, possibly in combination with the primary winding.
  • a preferred embodiment of the transformer in accordance with the invention is characterized in that each of the circumferential ridges has an interruption in at least two locations.
  • the high-voltage transformer shown in the Figures 1 and 2 (for example, a line output transformer for a television receiver) comprises a ferromagnetic core 1 which consists of two U-shaped portions and which supports a primary winding 3 and a secondary winding 5.
  • the secondary winding 5 of the embodiment shown in Figure 1 is coaxially arranged about the primary winding 3, but the primary winding may alternatively be provided on another limb of the core; underneath the secondary winding a coupling winding may be provided, if desirable.
  • the secondary winding 5 is composed (see also Figure 2) of a series of wire-wound cylindrical coils 7 (in this case three coils), each of which coaxially surrounds the preceding coil.
  • a cylindrical insulating member (not shown in the Figures 1 and 2) is provided between adjacent coils 7.
  • Successive pairs of coils are electrically connected by a diode 9, all of said diodes being poled in the same rectifying sense as appears from Figure 2.
  • the last coil 7 is connected to an output connection 13 via a diode 11 which is connected in the same rectifying sense.
  • the diode 9 and 11 are mounted on a diode holder 15 which is arranged on the secondary winding 5 and are conductively connected to the coils via wires 17.
  • the complete assembly formed by the secondary winding and the diodes is preferably moulden in a synthetic resin (not shown). Because the coils 7 are coaxially arranged over one another, they have a given capacitance with respect to each other; this is symbolized by the capacitors 19 (denoted by broken lines) in Figure 2.
  • FIG 3 is a longitudinal sectional view of the secondary winding 5 which shows that each of the coils 7 is wound on a cylindrical coil former 21 which is made of a suitable synthetic material, for example, by injection moulding. Consequently, the coil formers are dimensionally stable and each coil former can be separately provided with a coil 7 in a winding machine, after which they are arranged coaxially over one another. The insulating body between adjacent coils is then formed by the coil former of the outer one of these two coils.
  • Each coil former 21 comprises a large number of circumferential ridges 23 which define winding chambers 25 on the surface of the coil former.
  • a sub-coil 27 is wound in each winding chamber 25. All sub-coils 27 on a coil former 21 are connected in series and together they form one coil 7.
  • Figure 3 shows only three sub-coils 27 per coil former 21. No special requirements are imposed as regards the winding of the sub-coils 27, and the series connection of the sub-coils is very simply realized by feeding the winding wire, after deposition of the required number of turns in a chamber, via a narrow slit or gap (not shown) in the intermediate circumferential ridge, to the next chamber where winding is continued.
  • the capacitance 19 between two successive coils 7 depends mainly on the wall thickness and the material of the coil formers 21 and on the height of the ridges 23.
  • the depth of the winding chambers 25 preferably should not exceed their width.
  • the number of winding chambers should exceed ten. An excessive number of turns in a winding chamber imposes the risk that the voltage difference between neighbouring turns can no longer be withstood by the insulation of the winding wire.
  • each coil former 21 comprises twenty winding chambers 25 with a depth of 0.5 mm and a width of 1 mm.
  • the thickness of the ridges 23 is 0.5 mm and each winding chamber accommodates 45 turns of wire having a thickness of 0.09 mm (in five layers).
  • Figure 4 is a cross-sectional view of the secondary winding which shows that the circumferential ridges 23 are interrupted in four locations by interruption 29. These interruptions facilitate the penetration of an impregnating medium (for example, epoxy resin) with which the secondary winding is impregnated, if desired.
  • the number of interruptions 29 depends inter alia on the dimensions of the secondary winding 5 and on the number of coil formers 21. For thorough penetration of the impregnating medium, this number of interruptions should at least be two.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)
  • Insulating Of Coils (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Coils Or Transformers For Communication (AREA)

Claims (2)

1. Hochspannungstransformator mit einem Ferromagnetkern, auf dem zumindest eine Primär- und eine Sekundärwicklung (3 bzw. 5) angebracht sind, die aus einer Reihe aus Draht gewickelter zylinderförmiger Spulen (7) besteht, von denen jede die vorangehende koaxial umgibt und von ihr durch einen zylinderförmigen Isolierkörper (21) getrennt ist, wobei je zwei aufeinanderfolgende Spulen (7) eine bestimmte gegenseitige Kapazität aufweisen und durch eine Diode (9) miteinander verbunden sind und alle Dioden (9) im Gleichrichtungssinn geschaltet sind, während jede Spule (7) an sich aus einer Anzahl in Reihe geschalteter Teilspulen (27) besteht die jede wenigstens zwei Lagen von Windungen aufweisen, dadurch gekennzeichnet, dass jede Spule (7) auf einem formfesten, zylinderförmigen Spulenkörper (21) aufgewickelt ist, der auch den Isolierkörper zwischen aufeinanderfolgenden Spulen bildet und auf dessen Oberfläche mittels Umfangsrippen (23) zumindest zehn Wickelkammern (25) gebildet sind, denen in je eine Teilspule (27) gewickelt ist.
2. Hochspannungstransformator nach Anspruch 1, dadurch gekennzeichnet, dass die Tiefe der Wickelkammern (25) höchstens gleich ihrer Breite ist.
EP19810200697 1980-07-03 1981-06-19 Hochspannungstransformator Expired EP0043615B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8003852 1980-07-03
NL8003852A NL8003852A (nl) 1980-07-03 1980-07-03 Hoogspanningstransformator.

Publications (2)

Publication Number Publication Date
EP0043615A1 EP0043615A1 (de) 1982-01-13
EP0043615B1 true EP0043615B1 (de) 1984-11-28

Family

ID=19835558

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810200697 Expired EP0043615B1 (de) 1980-07-03 1981-06-19 Hochspannungstransformator

Country Status (7)

Country Link
EP (1) EP0043615B1 (de)
JP (2) JPS5745212A (de)
AU (1) AU543541B2 (de)
CA (1) CA1176704A (de)
DE (1) DE3167432D1 (de)
ES (1) ES503585A0 (de)
NL (1) NL8003852A (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4675639A (en) * 1985-05-10 1987-06-23 Rca Corporation Transformer assembly and winding therefor
DE8519972U1 (de) * 1985-07-10 1985-08-29 Siemens AG, 1000 Berlin und 8000 München Elektrische Verbinderleiste
FR2775383B1 (fr) * 1998-02-25 2000-05-05 Siraga Sa Transformateur tournant comportant un corps fixe et un corps rotatif disposes l'un en face de l'autre
US6552641B1 (en) 1999-07-27 2003-04-22 Thomson Licensing S.A. Transformer, especially for powering cathode ray tubes
RU2482562C2 (ru) * 2010-07-09 2013-05-20 В & С Ворлд Ко. Лтд Высоковольтный импульсный трансформатор без сердечника
US10790077B2 (en) 2017-10-31 2020-09-29 Waymo Llc Devices and methods for an electromagnetic coil

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5138046B2 (de) * 1971-11-18 1976-10-19
GB1439272A (en) * 1972-06-22 1976-06-16 Matsushita Electric Ind Co Ltd High voltage generator
NL159223C (de) * 1973-10-10
IT1023916B (it) * 1974-11-11 1978-05-30 Aes Applic Elettron Spa Dispositivo alimentatore, riduttore stat,co ad invertitore e con ventilatzione forzata, specialmente a datto per la arcosallatura elettrica acche ad alta frequeiza
JPS5317447U (de) * 1976-07-23 1978-02-14
US4204263A (en) * 1977-04-20 1980-05-20 Denki Onkyo Co., Ltd. Flyback transformer
JPS541006A (en) * 1977-06-06 1979-01-06 Ricoh Co Ltd Magnetic recorder-reproducer
US4229786A (en) * 1977-09-26 1980-10-21 Murata Manufacturing Co., Inc. Fly-back transformer with a low ringing ratio
NL7713118A (nl) * 1977-11-29 1979-05-31 Philips Nv Hoogspanningstransformator.

Also Published As

Publication number Publication date
JPS63145311U (de) 1988-09-26
CA1176704A (en) 1984-10-23
JPS5745212A (en) 1982-03-15
AU7240981A (en) 1982-01-07
EP0043615A1 (de) 1982-01-13
ES8204873A1 (es) 1982-05-16
NL8003852A (nl) 1982-02-01
AU543541B2 (en) 1985-04-26
ES503585A0 (es) 1982-05-16
DE3167432D1 (de) 1985-01-10

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