EP0267822A1 - Hochfrequenztransformator mit gedruckter Schaltungswicklung, insbesondere für sehr hohe Spannungsquelle - Google Patents

Hochfrequenztransformator mit gedruckter Schaltungswicklung, insbesondere für sehr hohe Spannungsquelle Download PDF

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Publication number
EP0267822A1
EP0267822A1 EP87402266A EP87402266A EP0267822A1 EP 0267822 A1 EP0267822 A1 EP 0267822A1 EP 87402266 A EP87402266 A EP 87402266A EP 87402266 A EP87402266 A EP 87402266A EP 0267822 A1 EP0267822 A1 EP 0267822A1
Authority
EP
European Patent Office
Prior art keywords
windings
transformer according
magnetic circuit
transformer
secondary 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Withdrawn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
EP87402266A
Other languages
English (en)
French (fr)
Inventor
Jean-Pierre Domenget
Gérard Lorec
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.)
Thales SA
Original Assignee
Dassault Electronique SA
Electronique Serge Dassault SA
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 Dassault Electronique SA, Electronique Serge Dassault SA filed Critical Dassault Electronique SA
Publication of EP0267822A1 publication Critical patent/EP0267822A1/de
Withdrawn legal-status Critical Current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
    • H01F27/2804—Printed windings
    • 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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/327—Encapsulating or impregnating
    • 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
    • H01F27/2804—Printed windings
    • H01F2027/2809—Printed windings on stacked layers

Definitions

  • the invention relates to transformers, and more particularly those which must operate at high frequency.
  • a transformer having the following essential specifications: - A plurality of secondary windings with a rectification for each secondary, and a series connection of the unit voltages thus obtained to constitute the high voltage; - a transformation ratio between the primary and each secondary which is close to 1, because in a transformer of ratio 1, the induced alternating voltages are low, and the parasitic inductive elements are minimal.
  • the essential object of the invention is to provide a new type of transformer making it possible to obtain excellent electrical performance, as small a footprint as possible, and which is at the same time of a simple industrial realization.
  • the transformer described in this document if it operates at high frequency, is of a very particular structure which does not make it possible to obtain a high voltage in a simple manner.
  • the present invention relates to a high frequency transformer having in common with the previous transformer the elements set out above.
  • the transformer according to the invention is remarkable in that its magnetic circuit is generally rectangular in shape, and in that the secondary windings are etched on flat insulating substrates (printed circuits, or even hybrid circuits), crossed perpendicularly by the one or more magnetic circuit cores.
  • the printed circuit boards, or at least some of them, are separated by insulating boards.
  • each plate comprises two windings, respectively concentric of the zone of passage of the parallel cores of the magnetic circuit, this zone most often being a circle.
  • each winding comprises several turns, the electrical return being provided on the other face of the printed circuit.
  • the secondary windings are combined in a resin block, molded on bars, the cross section of which corresponds to the size of the parallel cores of the magnetic circuit, equipped with the primary winding (s).
  • the primary windings are also produced in the form of printed circuit boards, crossed perpendicularly by the core (s) of the magnetic circuit. It is interesting that the primary windings alternate with the secondary windings.
  • the high frequency, high voltage power supply of FIG. 1 comprises a DC voltage source SV connected by means of a power switch PS to two primary windings P1 and P2 mounted in parallel and magnetically coupled to a magnetic circuit CM.
  • CM On the magnetic circuit CM are mounted pairs of secondary windings such as S11, S12, ..., S21, S22. These secondary windings are individually coupled to rectifiers R11, R12, ..., R21, R22. The outputs of the rectifiers, connected in series, provide a high voltage.
  • the straightening is simple alternation, for an extra-breaking power supply.
  • the winding is made in sandwich on the magnetic circuit CM (shown in part only). Indeed, there is from this magnetic circuit a primary winding, an insulator, a secondary winding, an insulator, another primary winding, an insulator, another secondary winding, another insulator, and so on.
  • the primary windings are in parallel and their secondary windings are mounted in series, after straightening.
  • FIG. 3 Another type of known transformer is illustrated in FIG. 3. To eliminate the above drawback, it can now be seen that all the primary windings are wound together on the magnetic core CM. After interposing an insulator, all the secondary windings are wound side by side.
  • FIG. 4 illustrates a first embodiment of a transformer according to the invention.
  • the magnetic circuit here consists of a CM core on which the one or more primary windings with interposition of an insulator (not shown).
  • the secondary windings are produced on printed circuit boards which extend perpendicular to the core of the magnetic circuit CM and are separated from the primary windings by an insulating sleeve IPS, for example cylindrical.
  • IPS insulating sleeve IPS
  • each secondary winding is positioned identically with respect to the magnetic circuit, the primary windings, and the other secondary windings. This design guarantees identical induced voltages at the terminals of each of the secondary windings.
  • the output wires of the secondary windings are not winding wires, but flexible wires soldered on the printed circuit. The reliability of the transformer is significantly improved.
  • the stray capacitances between the secondaries are identical, and moreover reproducible from one transformer to another.
  • the voltage between secondary is a constant DC voltage equal to the rectified unit voltage.
  • the insulator is therefore subjected to a low direct voltage, as well as to an almost zero alternating voltage, which increases the life of the transformer.
  • the distance between two turns is equal to twice the thickness of the insulating enamel of the wire.
  • a high frequency transformer has few turns, and the voltage between two contiguous turns is therefore high. It follows that a high frequency stray current occurs, and induces losses due to work. high frequency insulators. It turned out that the realization of the secondary windings in printed circuit strongly attenuates this effect, because the distance between the turns is increased, and the facing surfaces are very small due to the small thickness of the etching, most of the conductive cross section being provided in the direction perpendicular to this thickness.
  • the perpendicular positioning of the primary windings on the one hand, of the secondary windings on the other hand makes it possible to reduce the parasitic capacitance between the primary or primary and the secondary.
  • the operating frequency of the high-voltage high-frequency power supply or converter can therefore be made higher, which improves performance.
  • FIG. 5 Another embodiment of the invention is visible in FIG. 5.
  • the insulators I1, I2, I3, I4, I5 but they separate primary windings P1 and P2, alternating with secondary windings S1 and S2.
  • an IEM sleeve isolates the magnetic circuit from the windings, and above all allows the latter to be maintained during the casting of a coating resin.
  • FIG. 6 illustrates an elementary printed circuit board PC1, on which there are two spiral windings S11 and S12.
  • the external wire of the spiral winding S11 is connected to a terminal B14, while its internal wire passes on the other side of the printed circuit, to join a crossing RS11 which joins the terminal B15.
  • the mounting is the same on the other side, but symmetrically with respect to the vertical axis of the printed circuit board PC1, between the terminals B17 and B16.
  • the coils S11 and S12 are substantially concentric with the circles C1 and C2 which will be drilled later, to allow the passage of the two parts of the magnetic core that we see in CM31 and CM32 in FIG. 8, including the primary windings P1 and P2 which they carry respectively.
  • Bars for example made of aluminum alloy, are produced to define the external dimensions of cores CM31 and CM32, equipped with their respective primary windings.
  • a series of printed circuit boards PC1 to PCn are threaded on these bars, with their terminals B14, B15, B16, B17 upwards.
  • the desired connections between the terminals B14, B15, B16, B17 are made by FS output wires, which can be seen in FIG. 7.
  • the two windings of the same wafer are placed in series before straightening, which provides a total of 2n turns (for example 20), in a limited space.
  • the two primaries contain substantially the same number of turns, for example 16 each.
  • a variant of the invention advantageous if the voltage is not too high, would consist in making the secondary, possibly the primary, by etching of circuits on ceramic substrates, that is to say in so-called hybrid technology.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Dc-Dc Converters (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP87402266A 1986-10-15 1987-10-09 Hochfrequenztransformator mit gedruckter Schaltungswicklung, insbesondere für sehr hohe Spannungsquelle Withdrawn EP0267822A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8614336 1986-10-15
FR8614336A FR2605453A1 (fr) 1986-10-15 1986-10-15 Transformateur haute frequence avec enroulement en circuit imprime, en particulier pour alimentation a tres haute tension

Publications (1)

Publication Number Publication Date
EP0267822A1 true EP0267822A1 (de) 1988-05-18

Family

ID=9339878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87402266A Withdrawn EP0267822A1 (de) 1986-10-15 1987-10-09 Hochfrequenztransformator mit gedruckter Schaltungswicklung, insbesondere für sehr hohe Spannungsquelle

Country Status (3)

Country Link
US (1) US4977491A (de)
EP (1) EP0267822A1 (de)
FR (1) FR2605453A1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2264395A (en) * 1992-02-21 1993-08-25 Gen Electric Z-foldable winding for a multi-pole transformer
GB2230651B (en) * 1989-03-01 1994-02-09 Bosch Siemens Hausgeraete Mounting of a high-voltage transformer in an appliance
EP0715322A1 (de) * 1994-12-02 1996-06-05 The Mtl Instruments Group Plc Transformatoren
EP0716435A1 (de) * 1994-06-29 1996-06-12 Yokogawa Electric Corporation Transformator mit gedruckten spulen
GB2306254A (en) * 1995-10-12 1997-04-30 Daewoo Electronics Co Ltd Flyback transformer coil structure
EP1073072A1 (de) * 1999-07-29 2001-01-31 Alcatel Verfahren zur Herstellung eines Moduls mit einer induktiven Wicklung und entsprechendes Modul
EP1536436A1 (de) * 2002-06-26 2005-06-01 Premo, S.A. Verfahren zur herstellung von planartransformatoren und so hergestellter planartransformator
CN106787518A (zh) * 2016-12-23 2017-05-31 桂林电器科学研究院有限公司 一种印制绕组电枢制造工艺

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5241293A (en) * 1988-06-15 1993-08-31 Murata Manufacturing Co., Ltd. Flyback transformer including a plated metal coil and having reduced leakage flux
EP0481682B1 (de) * 1990-10-18 1996-07-24 Valor Electronics Inc. Nicht-gekoppelte integrierte magnetische Struktur
US5166965A (en) * 1991-04-11 1992-11-24 Varian Associates, Inc. High voltage dc source including magnetic flux pole and multiple stacked ac to dc converter stages with planar coils
US5355301A (en) * 1992-02-28 1994-10-11 Fuji Electric Co., Ltd. One-chip type switching power supply device
US5331536A (en) * 1992-11-05 1994-07-19 Opt Industries, Inc. Low leakage high current transformer
US5631815A (en) * 1995-12-12 1997-05-20 Cross; James D. High voltage power supply
US5801602A (en) * 1996-04-30 1998-09-01 3Com Corporation Isolation and signal filter transformer
DE19652638C2 (de) * 1996-12-18 2001-02-22 Loewe Opta Gmbh Transformator zur Erzeugung einer Hochspannung
US6252532B1 (en) 1998-02-26 2001-06-26 3Com Corporation Programmable compensation and frequency equalization for network systems
US6026004A (en) * 1998-12-21 2000-02-15 Ruanduff Electrical Limited Modular high voltage power supply with integral flux leakage compensation
KR20040042088A (ko) * 2002-11-13 2004-05-20 이수세라믹 주식회사 평면 인덕터
US7167074B2 (en) * 2005-01-12 2007-01-23 Medtronic, Inc. Integrated planar flyback transformer
JP5034613B2 (ja) * 2007-03-30 2012-09-26 Ｔｄｋ株式会社 Ｄｃ／ｄｃコンバータ
US7903432B2 (en) * 2009-05-29 2011-03-08 General Electric Company High-voltage power generation system and package
CN103839667B (zh) * 2012-11-23 2018-10-23 Ge医疗系统环球技术有限公司 一种平面高压变压器

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FR2038310A1 (de) * 1969-04-08 1971-01-08 Marconi Co Ltd
US4201965A (en) * 1978-06-29 1980-05-06 Rca Corporation Inductance fabricated on a metal base printed circuit board
FR2476898A1 (fr) * 1980-02-22 1981-08-28 Mini Informatiq System Ste Eur Bobinage electromagnetique comportant des elements discrets et dispositif d'alimentation electrique comportant de tels bobinages

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US3238480A (en) * 1966-03-01 Printed circuit electrical windings and inductive apparatus using such windings
FR1185354A (fr) * 1956-01-30 1959-07-31 Thomson Houston Comp Francaise Structure inductive avec circuits imprimés
US2988715A (en) * 1958-09-02 1961-06-13 Zenith Radio Corp Sweep transformer
GB993265A (en) * 1962-04-10 1965-05-26 Tokyo Denshi Seiki Kabushiki K Electrical coils
US3419834A (en) * 1966-03-24 1968-12-31 Ian C. Mckechnie Electrical coils
US3851287A (en) * 1972-02-09 1974-11-26 Litton Systems Inc Low leakage current electrical isolation system
NL159223C (de) * 1973-10-10
DE2409881C3 (de) * 1974-03-01 1978-12-21 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schalenkernübertrager
GB1440304A (en) * 1974-11-29 1976-06-23 Mullard Ltd Transmission line pulse transformers
GB1494087A (en) * 1975-10-22 1977-12-07 Data Recording Instr Co Magnetic recording and reproducing transducers and methods of manufacture thereof
US4066955A (en) * 1975-12-29 1978-01-03 General Electric Company High voltage transformer winding assembly with multiple frequency tuning
US4039924A (en) * 1975-12-29 1977-08-02 General Electric Company High voltage winding assembly with improved regulation
US4517540A (en) * 1977-05-13 1985-05-14 Mcdougal John A Spiral windings
DE2917388A1 (de) * 1979-04-28 1980-11-06 Bosch Gmbh Robert Spulenanordnung mit mindestens einer spule und einem kern
US4547961A (en) * 1980-11-14 1985-10-22 Analog Devices, Incorporated Method of manufacture of miniaturized transformer
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FR2038310A1 (de) * 1969-04-08 1971-01-08 Marconi Co Ltd
US4201965A (en) * 1978-06-29 1980-05-06 Rca Corporation Inductance fabricated on a metal base printed circuit board
FR2476898A1 (fr) * 1980-02-22 1981-08-28 Mini Informatiq System Ste Eur Bobinage electromagnetique comportant des elements discrets et dispositif d'alimentation electrique comportant de tels bobinages

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ELECTRONICS INTERNATIONAL, vol. 54, no. 17, août 1981, pages 113-117, New York, US; D. BOKIL et al.: "Thick-film transformer advances hybrid isolation amplifier" *
PATENT ABSTRACTS OF JAPAN, vol. 9, no. 110 (E-314)[1833], 15 mai 1985; & JP-A-60 000 718 (MITSUBISHI DENKI K.K.) 05-01-1985 *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2230651B (en) * 1989-03-01 1994-02-09 Bosch Siemens Hausgeraete Mounting of a high-voltage transformer in an appliance
GB2264395A (en) * 1992-02-21 1993-08-25 Gen Electric Z-foldable winding for a multi-pole transformer
GB2264395B (en) * 1992-02-21 1996-06-19 Gen Electric Z-foldable secondary winding for a low-profile,multi-pole transformer
EP0716435A1 (de) * 1994-06-29 1996-06-12 Yokogawa Electric Corporation Transformator mit gedruckten spulen
EP0716435A4 (de) * 1994-06-29 1996-11-20 Yokogawa Electric Corp Transformator mit gedruckten spulen
EP0715322A1 (de) * 1994-12-02 1996-06-05 The Mtl Instruments Group Plc Transformatoren
GB2306254A (en) * 1995-10-12 1997-04-30 Daewoo Electronics Co Ltd Flyback transformer coil structure
EP1073072A1 (de) * 1999-07-29 2001-01-31 Alcatel Verfahren zur Herstellung eines Moduls mit einer induktiven Wicklung und entsprechendes Modul
FR2797089A1 (fr) * 1999-07-29 2001-02-02 Cit Alcatel Procede pour l'obtention d'un module incluant un bobinage inductif et module correspondant
US6748645B1 (en) 1999-07-29 2004-06-15 Alcatel Method of obtaining a module including an inductive winding
EP1536436A1 (de) * 2002-06-26 2005-06-01 Premo, S.A. Verfahren zur herstellung von planartransformatoren und so hergestellter planartransformator
EP1536436B1 (de) * 2002-06-26 2017-01-25 Premo, S.L. Verfahren zur herstellung von planartransformatoren und so hergestellter planartransformator
CN106787518A (zh) * 2016-12-23 2017-05-31 桂林电器科学研究院有限公司 一种印制绕组电枢制造工艺

Also Published As

Publication number Publication date
US4977491A (en) 1990-12-11
FR2605453A1 (fr) 1988-04-22

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