EP0491214A1 - Transformateur, en particulier transformateur d'impulsions - Google Patents

Transformateur, en particulier transformateur d'impulsions Download PDF

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Publication number
EP0491214A1
EP0491214A1 EP91120677A EP91120677A EP0491214A1 EP 0491214 A1 EP0491214 A1 EP 0491214A1 EP 91120677 A EP91120677 A EP 91120677A EP 91120677 A EP91120677 A EP 91120677A EP 0491214 A1 EP0491214 A1 EP 0491214A1
Authority
EP
European Patent Office
Prior art keywords
transformer
primary
conductor track
transformer according
secondary winding
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Withdrawn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
EP91120677A
Other languages
German (de)
English (en)
Inventor
Robert Schilling
Andreas Stiedl
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 Asea Brown Boveri Ltd
ABB AB
Original Assignee
ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
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 Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical ABB Asea Brown Boveri Ltd
Publication of EP0491214A1 publication Critical patent/EP0491214A1/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Withdrawn legal-status Critical Current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
    • H01F17/00—Fixed inductances of the signal type
    • H01F17/0006—Printed inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F19/00—Fixed transformers or mutual inductances of the signal type
    • H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range
    • H01F19/08—Transformers having magnetic bias, e.g. for handling pulses

Definitions

  • the invention is based on a transformer, in particular a pulse transformer, according to the preamble of claim 1.
  • this transformer serves as a pulse transformer primarily for the transmission of electrical, pulse-shaped signals in an information transmission system. In doing so, it also causes the electrical isolation of the signal source and the signal sink of the transmission system. However, it can also be used to transmit small energies or as a current or voltage converter for measurement purposes.
  • EP-A2-350 624 it is known to arrange a pulse transformer of the generic type in a transmission path, which transmits voltage-dependent frequency signals from the secondary side of a mains transformer of a supply device to its primary side. Due to the pulse transformer provided in the transmission path, the primary and secondary sides of the mains transformer remain galvanically isolated from one another, and the transmitted, secondary voltage-dependent frequency signals can be used to adjust the primary voltage applied to the mains transformer.
  • the pulse transformers usually used in this case are comparatively complex, since on the one hand they should have high electrical voltage resistance, only slight specimen scattering and low sensitivity to interference, but on the other hand they should also show good aging behavior and characterized by the ability to transmit high frequencies.
  • the invention as defined in claim 1, is based on the object of specifying a transformer of the type mentioned at the outset, which is of simple construction and nevertheless ensures extremely reliable signal or, if appropriate, energy or measured variable transmission.
  • the transformer according to the invention is characterized in that, due to its design, a high galvanic isolation is ensured and a verification of this isolation can be omitted.
  • the number of specimens is low and, in the case of suitable production processes, for example on the basis of printed circuit boards and pre-impregnated insulating layers which connect the printed circuit boards by adhesive connection, is largely independent of parameters of the production process.
  • Known and proven technologies from printed circuit board manufacture can be used in the manufacture of the transformer according to the invention, so that it is possible to manufacture inexpensively, especially in large quantities.
  • the transformer according to the invention is highly insensitive to interference at high pulse energies and enables almost interference-free transmission even with short pulses even up to comparatively high frequencies.
  • FIG. 1 shows three components of an embodiment of the transformer according to the invention before it is assembled, namely an upper circuit board 1, a lower circuit board 2 and an insulating layer 3 located between the two circuit boards 1, 2.
  • the upper circuit board 1 has a plate-shaped insulating body 4 made of an insulating material, such as glass fiber reinforced plastic or hard paper, and is designed as a two-level circuit board.
  • a first level forms the upper side of the insulating body 4.
  • conductor tracks serving as galvanic connections 5, 6 are applied to the insulating body 4.
  • the connection 5 has two interconnect eyelets 8, 9 which are electrically conductively connected to one another by an angled interconnect section 7, each of which is guided in an electrically conductive manner at an interconnect eyelet 10, 11 shown in broken lines through an insulating hole 4 of the circuit board 1.
  • a second level forms the underside of the insulating body 4.
  • the conductor track eyelets 10, 11 are applied to this area.
  • the connection 6 has a conductor track eyelet 12, which is guided through a further hole, not shown, through the insulating body 4 in an electrically conductive manner to a conductor track eyelet 13 shown in dashed lines.
  • the conductor track eyelet 13 is also applied to the underside of the insulating body 4.
  • a conductor track 14 is also applied to the underside of the insulating body 4.
  • This conductor track is designed as a flat spiral.
  • the conductor track eyelet 10 forms the inner end of the spiral which is in contact with the electrical connection 5 and the conductor track eyelet 13 in contact with the electrical connection 6.
  • the spiral represents, for example, the primary winding of the transformer according to the invention.
  • the galvanic connections 5, 6 located at the edge of the printed circuit board 1 and therefore easily accessible serve to electrically connect this winding to a signal source.
  • the lower printed circuit board 2 has a plate-shaped insulating body 15 corresponding to the insulating body 4 of the printed circuit board 1 and is also designed as a two-level printed circuit board.
  • a conductor track 16 designed as a flat spiral is applied to the surface forming the upper side of the insulating body.
  • the ends of this spiral are electrically connected in accordance with the conductor track 14 by means of conductor track eyelets (not designated) and through-contacts through the insulating body 15 with galvanic connections 17, 18.
  • this spiral is designed in accordance with the conductor track 14, but is arranged in a mirror image of it.
  • the spiral represents, for example, the secondary winding of the transformer according to the invention.
  • the galvanic connections 17, 18 which are led to the edge of the printed circuit board 2 and are therefore also easily accessible serve, corresponding to the connections 5, 6, for the electrical connection of the secondary winding to a signal sink. To ensure a secure connection even with small dimensions, however, the connections are made on the edge of the printed circuit board 2 opposite the connections 5, 6.
  • the insulating layer 3 located between the two printed circuit boards 1, 2 can be formed by any layered insulating material, the insulation strength of which is sufficient to hold the electrical field between the primary and secondary windings after the transformer has been assembled.
  • Transformers according to the invention can be produced as follows: First, the galvanic connections 5, 6 and. 17, 18 and on the underside corresponding conductor tracks generated. This can be achieved by known methods, such as etching or screen printing of two-level circuit boards or galvanic application of the conductor tracks. Since transformers according to the invention have the smallest possible dimensions because of their preferred use as a pulse transformer and typically have a square base area of, for example, 10 mm at a height of, for example, 2 mm, the wiring patterns of numerous transformers according to the invention can be applied to a single base circuit board . Then the bores not shown in FIG. 1 are guided through the base circuit boards and the conductor track eyelets 8 and 10, 9 and 11 and 12 and 13 are connected to one another, for example by galvanic coating.
  • the starting material for the insulating layer is preferably a pre-impregnated insulating film, for example based on glass or synthetic fiber, with a pre-gelled resin, such as epoxy or polyester resin, with a thickness of a few tenths of a millimeter.
  • a pre-impregnated insulating film for example based on glass or synthetic fiber
  • a pre-gelled resin such as epoxy or polyester resin
  • the two printed circuit boards and the insulating layer are adhesively bonded together in a press at suitable temperature and pressure conditions.
  • the resin provided in the starting material of the insulating layer 3 first liquefies and penetrates into the recesses between the individual spiral turns of the conductor tracks 14, 16 and hardens.
  • the spiral turns are electrically insulated from one another particularly well.
  • the circuit boards are firmly glued and, at the same time, reliable electrical insulation is achieved between the conductor tracks 14 and 16, which act as primary and secondary windings.
  • the individual active transformer parts are now cut out of the printed circuit board package produced in this way and provided with connecting lines.
  • the connecting cables can be plugged into the holes provided on the edge of the connections 5, 6, 17 and 18 and soldered.
  • the conductor tracks 14 and 16 corresponding to the windings are almost congruent with one another and essentially overlap one another.
  • the magnetic coupling between the conductor tracks 14 and 16 is sufficient in the case of conductor tracks with approximately 10 to 20 spiral windings in order, for example, to reliably transmit frequency signals into the 10 MHz range.
  • the magnetic coupling can be further improved if, as can be seen from FIG. 2, a ferromagnetic 19 is additionally provided.
  • This ferromagnetic contains two parts 20, 21, of which part 20 covers the circuit board 1 and thus, for example, the primary winding and part 21 covers the circuit board 2 and thus, for example, the secondary winding. Both parts are connected to one another via a web 22.
  • the magnetic flux is amplified by the transformer according to the invention, so that it can preferably be used as a power transformer. It is advisable to design the ferromagnetic material as a clamp made of ferritic material, since this ensures a quick assembly option with a large magnetic coupling.
  • the conductor tracks 14 and 16 which act as primary winding and as secondary winding, are composed of straight conductor track sections to form flat spirals.
  • the spirals can of course also be formed by continuously curved flat curves, but can also form spatial curves when applied to curved surfaces (flexible printed circuit boards). It is particularly important that, in order to achieve good magnetic coupling, the surfaces covered by the conductor tracks of the primary and secondary windings are congruent to one another and overlap one another, that the distance between the conductor tracks is small and that by suitable selection of the insulating bodies and the conductor tracks and the insulation layer can accommodate a comparatively large number of spiral turns even on a small area.
  • the transformer can also have two or more primary and / or two or more secondary windings.
  • the conductor tracks acting as primary and secondary windings do not necessarily have to be applied in each case to one of two insulating bodies. It is also possible to apply primary and secondary windings on facing surfaces of only one insulating body, for example insulating layer 3, which face away from one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP91120677A 1990-12-19 1991-12-02 Transformateur, en particulier transformateur d'impulsions Withdrawn EP0491214A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH403090 1990-12-19
CH4030/90 1990-12-19

Publications (1)

Publication Number Publication Date
EP0491214A1 true EP0491214A1 (fr) 1992-06-24

Family

ID=4268496

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91120677A Withdrawn EP0491214A1 (fr) 1990-12-19 1991-12-02 Transformateur, en particulier transformateur d'impulsions

Country Status (1)

Country Link
EP (1) EP0491214A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4422827A1 (de) * 1993-06-29 1995-01-12 Yokogawa Electric Corp Geschichtete vergossene Wicklung und Verfahren zu ihrer Herstellung
WO1997000526A1 (fr) * 1995-06-17 1997-01-03 Robert Bosch Gmbh Composant inductif
EP0767473A1 (fr) * 1995-10-03 1997-04-09 Fronius Schweissmaschinen Kg Austria Bobine et procédé de sa fabrication pour transformateur
DE19652039A1 (de) * 1996-12-16 1998-06-18 Bosch Gmbh Robert Transformator
GB2388716A (en) * 2002-05-13 2003-11-19 Splashpower Ltd Contactless power transfer area
US6906495B2 (en) 2002-05-13 2005-06-14 Splashpower Limited Contact-less power transfer
WO2007063884A1 (fr) * 2005-11-30 2007-06-07 Holy Loyalty International Co., Ltd. Composant de bobine d'inductance de surface
WO2008132645A1 (fr) 2007-04-26 2008-11-06 Philips Intellectual Property & Standards Gmbh Transformateur planaire à cartes
RU2488906C2 (ru) * 2007-08-28 2013-07-27 Эксесс Бизнесс Груп Интернешнл Ллс Индуктивное энергоснабжение
WO2014114584A1 (fr) * 2013-01-22 2014-07-31 Phoenix Contact Gmbh & Co.Kg Carte de circuit imprimé à structure en couches
EP2348516B1 (fr) * 2010-01-21 2020-09-16 Rwaytech Capteur ferroviaire à transformateur sans noyau à haute isolation galvanique
CN114765091A (zh) * 2021-01-13 2022-07-19 三菱电机株式会社 变压器装置及半导体装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB772528A (en) * 1951-12-21 1957-04-17 Standard Telephones Cables Ltd Improvements in or relating to electric coils
FR2293110A1 (fr) * 1974-11-29 1976-06-25 Philips Nv Transformateur d'impulsions a ligne de transmission
GB2083952A (en) * 1980-09-11 1982-03-31 Asahi Chemical Ind Microcoil Assembly
JPH02155204A (ja) * 1988-12-07 1990-06-14 Matsushita Electric Ind Co Ltd インダクタおよびそれを用いたｌｃ発振器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB772528A (en) * 1951-12-21 1957-04-17 Standard Telephones Cables Ltd Improvements in or relating to electric coils
FR2293110A1 (fr) * 1974-11-29 1976-06-25 Philips Nv Transformateur d'impulsions a ligne de transmission
GB2083952A (en) * 1980-09-11 1982-03-31 Asahi Chemical Ind Microcoil Assembly
JPH02155204A (ja) * 1988-12-07 1990-06-14 Matsushita Electric Ind Co Ltd インダクタおよびそれを用いたｌｃ発振器

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN Bd. 8, Nr. 5, 5. Oktober 1965, U.S.A. Seite 723; CRAWFORD ET AL: 'ETCHED TRANSFORMER' *
PATENT ABSTRACTS OF JAPAN vol. 14, no. 411 (E-973)(4354) 5. September 1990 & JP-A-2 155 204 ( MATSUSHITA ELECTRIC IND ) 14. Juni 1990 *

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4422827A1 (de) * 1993-06-29 1995-01-12 Yokogawa Electric Corp Geschichtete vergossene Wicklung und Verfahren zu ihrer Herstellung
WO1997000526A1 (fr) * 1995-06-17 1997-01-03 Robert Bosch Gmbh Composant inductif
EP0767473A1 (fr) * 1995-10-03 1997-04-09 Fronius Schweissmaschinen Kg Austria Bobine et procédé de sa fabrication pour transformateur
DE19652039A1 (de) * 1996-12-16 1998-06-18 Bosch Gmbh Robert Transformator
US7714537B2 (en) 2002-05-13 2010-05-11 Access Business Group International Llc Contact-less power transfer
US7952324B2 (en) 2002-05-13 2011-05-31 Access Business Group International Llc Contact-less power transfer
US6906495B2 (en) 2002-05-13 2005-06-14 Splashpower Limited Contact-less power transfer
GB2388716B (en) * 2002-05-13 2004-10-20 Splashpower Ltd Improvements relating to contact-less power transfer
US7525283B2 (en) 2002-05-13 2009-04-28 Access Business Group International Llc Contact-less power transfer
GB2388716A (en) * 2002-05-13 2003-11-19 Splashpower Ltd Contactless power transfer area
US7863861B2 (en) 2002-05-13 2011-01-04 Access Business Group International Llc Contact-less power transfer
WO2007063884A1 (fr) * 2005-11-30 2007-06-07 Holy Loyalty International Co., Ltd. Composant de bobine d'inductance de surface
CN101675488B (zh) * 2007-04-26 2012-09-05 皇家飞利浦电子股份有限公司 具有板的平面变压器
WO2008132645A1 (fr) 2007-04-26 2008-11-06 Philips Intellectual Property & Standards Gmbh Transformateur planaire à cartes
US8378775B2 (en) 2007-04-26 2013-02-19 Koninklijke Philips Electronics N.V. Planar transformer with boards
RU2488906C2 (ru) * 2007-08-28 2013-07-27 Эксесс Бизнесс Груп Интернешнл Ллс Индуктивное энергоснабжение
EP2348516B1 (fr) * 2010-01-21 2020-09-16 Rwaytech Capteur ferroviaire à transformateur sans noyau à haute isolation galvanique
WO2014114584A1 (fr) * 2013-01-22 2014-07-31 Phoenix Contact Gmbh & Co.Kg Carte de circuit imprimé à structure en couches
CN105009235A (zh) * 2013-01-22 2015-10-28 菲尼克斯电气公司 具有层结构的电路板
US9793042B2 (en) 2013-01-22 2017-10-17 Phoenix Contact Gmbh & Co. Kg Printed circuit board having a layer structure
CN114765091A (zh) * 2021-01-13 2022-07-19 三菱电机株式会社 变压器装置及半导体装置

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