EP0033450B1 - Zeilentransformator für einen Fernsehempfänger - Google Patents

Zeilentransformator für einen Fernsehempfänger Download PDF

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Publication number
EP0033450B1
EP0033450B1 EP81100252A EP81100252A EP0033450B1 EP 0033450 B1 EP0033450 B1 EP 0033450B1 EP 81100252 A EP81100252 A EP 81100252A EP 81100252 A EP81100252 A EP 81100252A EP 0033450 B1 EP0033450 B1 EP 0033450B1
Authority
EP
European Patent Office
Prior art keywords
winding
line transformer
transformer according
rectifier
high voltage
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
EP81100252A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0033450A1 (de
Inventor
Walter Dipl.-Ing. Goseberg
Alfred Pollak
Wolfgang Dipl.-Ing. Reichow
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.)
Cessione telefunken Fernseh und Rundfunk GmbH
Original Assignee
Licentia Patent Verwaltungs 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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to AT81100252T priority Critical patent/ATE5355T1/de
Publication of EP0033450A1 publication Critical patent/EP0033450A1/de
Application granted granted Critical
Publication of EP0033450B1 publication Critical patent/EP0033450B1/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
    • H01F38/42—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 line transformer of a television receiver produces, as is known, by means of a high-voltage winding and a high-voltage rectifier and the like. a. the high voltage for the picture tube in the order of 25 KV. This voltage is obtained by rectifying the pulse-shaped return voltage. Because of this high pulse-shaped voltage, particularly high demands are placed on the dielectric strength of the line transformer, since such high pulse voltages can easily lead to flashovers and spray phenomena.
  • the line transformer generally contains a frame-shaped core with an air gap, with the principle of the single-leg transformer, the primary winding and the high-voltage winding being arranged one above the other on the same leg of the core.
  • the high voltage winding takes up practically the entire length of one leg of the core, i. H. as far as the other legs extending at right angles from this leg. It is precisely at these points, where the end of the high-voltage winding lies close to the budding core leg, that the high pulse voltage of the high-voltage winding also lies. Therefore, there are particular difficulties at this point in achieving the necessary dielectric strength.
  • Such transformers are tested with an overvoltage of 50%, so that in this case even higher pulse voltages occur, which reach the order of 40 KV over the entire high-voltage winding.
  • the invention is based on the object of designing the line transformer in such a way that the requirements for dielectric strength, in particular between the pulse-shaped voltage and the core of the transformer, can be mastered even with a narrow structure of the entire transformer.
  • the two ends of the entire high-voltage winding do not carry any pulse voltage, but are cold in terms of AC voltage.
  • One end of the high voltage winding can be directly grounded.
  • the other end of the high-voltage winding connected to the anode of the picture tube likewise does not carry any pulse voltage due to the effect of the capacitance of the picture tube, but only the direct anode voltage for the picture tube.
  • a DC voltage is, however, much less critical than a pulsed voltage with regard to the dielectric strength and the risk of arcing.
  • the high pulse voltage which inevitably occurs on the high-voltage winding, however, in the case of the invention is advantageously effective in its full amount only in the middle of the entire high-voltage winding.
  • the pulse voltage can be handled much better because the center of the high-voltage winding is far away from the two legs of the core that depart at right angles.
  • the unavoidable maximum pulse voltage is thus spatially moved to where it can best be mastered.
  • additional constructive measures can also be provided on the winding former, by means of which, for. B. the distance of the high-voltage rectifier from the core is increased.
  • the winding body is preferably made of Makrolon. This has a much better dielectric strength than a potting compound.
  • the division of the high-voltage winding and the interposed diode leads to a forced symmetry of the high-voltage winding. This reduces the safety surcharge required in known transformers when dimensioning the diode blocking voltage.
  • the aforementioned forced symmetry in connection with the absence of AC voltage at the ends of the winding leads to minimal interference radiation from the high-voltage winding.
  • the high-voltage winding is also divided into several partial windings, between which high-voltage rectifiers are arranged. There, however, no use is made of the solution according to the invention. Rather, the end of the high-voltage winding facing the picture tube is not cold in terms of AC voltage, but still carries a pulse voltage, which is to be avoided in the present invention.
  • 1 shows the line output stage transistor 2 controlled by the line-frequency switching voltage 1, the line transformer 3 with the primary winding 4, the picture tube 9, the capacitor 8 essentially formed by the picture tube 9, the coupling capacitor 10 also used for equalizing the tangents, and the line deflection coils 11.
  • the high-voltage winding for generating the high voltage of 24 KV for the picture tube 9 is divided into two sub-windings 12, 13 of the same size, between which the high-voltage rectifier 14 is located.
  • the mode of operation is explained with reference to FIG.
  • the lower end of the winding 13 is grounded and therefore carries neither a DC voltage nor an AC voltage. No problems can therefore arise at this end of the entire high-voltage winding.
  • the upper end of the winding 12 is also without pulse voltage due to the action of the capacitor 8, so that there is only a pure DC high voltage on the picture tube 9.
  • At the upper end of the winding 13 is the DC voltage-free pulse voltage a with an amplitude of z. B. 12.5 KV. If the upper end of the winding 13 carries a positive pulse with respect to earth, then the lower end of the winding 12 must carry a negative pulse b with the same winding direction of the windings 12, 13.
  • FIG. 3 shows the frame-shaped core with the three legs 15, 16, 17.
  • the leg 15 carries the winding body 18 for the high-voltage winding designed as a chamber winding.
  • the winding body 18 contains a wall 19, the width and diameter of which are greater than that of the other chamber walls 20.
  • Two rectifiers 14a and 14b connected in series are arranged on the outer circumference of the wall 19 for reasons of dielectric strength.
  • One end of the series connection of these two rectifiers is connected to the left part of the chamber winding, which represents the partial winding 13, and the other end of the series connection to the right part of the chamber winding, which represents the partial winding 12. It can be seen that the rectifiers 14, at which the pulse voltages a and b occur, now have a large distance from the legs 16, 17 and the particularly dangerous corners between the legs 16/15 and 17/15.
  • Figure 4 shows the arrangement of Figure 3 from below.
  • FIG. 5 shows a chamber winding as in FIGS. 3, 4, but which is advantageously adapted to the voltage ratios of the pulse voltage.
  • the windings 12, 13 are designed as a chamber winding and each consist of partial windings 21, which are in the chambers formed by the chamber walls 20 22 are arranged distributed.
  • another wall 19 is provided in the middle, on the circumference of which the rectifier 14 or the series connection of the rectifiers 14a and 14b are located.
  • the chambers 22 are rounded at the bottom by a groove 30. Avoiding a sharp corner improves the dielectric strength.
  • the groove 31 on the wall 19 has an even larger radius for this purpose.
  • the pulse voltage at the left and right ends of the total winding is zero and increases towards the middle.
  • This fact is the thickness d of the bobbin 18 at the bottom of each chamber 22 adapted by the wall thickness d increases from the two ends to the center, because yes there.
  • Pulse voltage has its maximum amplitude.
  • the insulation between the individual partial windings 21 and the primary winding 4 or the core 15 is therefore advantageously adapted to the actual amplitude of the effective pulse voltage. In this way, a particularly strong coupling between the high-voltage winding and the primary winding 4 can be achieved. This results in a low leakage inductance and thus the advantage of matching the leakage inductance to a high harmonic of the frequency of the return vibration in order to achieve a low internal resistance of the high-voltage source.
  • the respective first and last chamber is not provided with a partial winding 21 and can be used for the wire infeed.
  • the individual chambers 22 are filled differently with the partial windings 21. With such a different filling, the leakage inductance and thus the tuning to a harmonic can also be influenced.
  • FIG. 6 shows a special position of the rectifier 14 on the outer circumference of the chamber wall 19.
  • the rectifier 14 is arranged obliquely to the circumferential direction of the chamber wall 19. This position increases the distance between the connecting wires 25 of the rectifier 14 from the following chamber, that is to say at the other end of the rectifier 14. It can be seen that the lead wire 25 of the rectifier 14 is further from the chamber 22a lies as if the rectifier 14 were arranged exactly in the circumferential direction of the chamber wall 19. It is precisely between the connecting wire 25 and the winding in the chamber 22a that there is the greatest risk of arcing because there the voltage difference according to FIG. 2 is maximum.
  • the rectifier 14, as in FIG. 5, is arranged offset radially outward.
  • the chamber wall 19 does not have a continuously larger diameter than the other chamber walls 20.
  • the chamber wall 19 is rather only provided with a radially directed extension 26 at the location of the rectifier 14. In the remaining area, the chamber wall 19 has the same diameter as the other chamber walls 20.
  • the rectifier 14 is preferably on the chamber wall 19 by a fastening device, for. B. a snap-in connection.
  • the relatively rigid connecting wires of the rectifier 14 can simultaneously serve as support points for the relatively thin wire of the high-voltage winding 12.
  • the ends of the partial windings arranged in the chambers 22 are connected directly to the connecting wires of the rectifier 14. Their connecting wires thus take over the task of the pins otherwise provided on a coil former and serving as a base.
  • the primary winding 4, the high-voltage windings 12, 13 and the rectifier 14 are cast together in a cast resin block and thus surrounded on all sides by the resin. This creates a tension-proof and fireproof unit.
  • a resin for. B. a thermosetting epoxy resin or a polyester resin can be used.
  • the cast resin block containing the named components then has four connections, namely the connections for the primary winding 4, the output for the high voltage according to c in FIG. 1 and the output for the lower end of the winding 13, which is grounded when the transformer is installed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Details Of Television Scanning (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Television Receiver Circuits (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Details Of Television Systems (AREA)
  • Communication Cables (AREA)
  • Rectifiers (AREA)
EP81100252A 1980-01-21 1981-01-15 Zeilentransformator für einen Fernsehempfänger Expired EP0033450B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81100252T ATE5355T1 (de) 1980-01-21 1981-01-15 Zeilentransformator fuer einen fernsehempfaenger.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3001975 1980-01-21
DE19803001975 DE3001975A1 (de) 1980-01-21 1980-01-21 Zeilentransformator fuer einen fernsehempfaenger

Publications (2)

Publication Number Publication Date
EP0033450A1 EP0033450A1 (de) 1981-08-12
EP0033450B1 true EP0033450B1 (de) 1983-11-16

Family

ID=6092532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81100252A Expired EP0033450B1 (de) 1980-01-21 1981-01-15 Zeilentransformator für einen Fernsehempfänger

Country Status (8)

Country Link
US (1) US4406978A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0033450B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS56109073A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) ATE5355T1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BR (1) BR8100290A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (2) DE3001975A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES498632A0 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
HK (1) HK103588A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57135680A (en) * 1981-02-12 1982-08-21 Murata Mfg Co Ltd Flyback transformer
US4507721A (en) * 1982-07-28 1985-03-26 Nippon Telegraph & Telephone Public Corporation DC-DC Converter for remote power feeding
JPS6374083U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1986-10-31 1988-05-17
JPS6379615U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1986-11-14 1988-05-26
DE3733458A1 (de) * 1987-09-30 1989-04-13 Electronic Werke Deutschland Zeilentransformator fuer einen fernsehempfaenger
DE3902219A1 (de) * 1989-01-26 1990-08-02 Electronic Werke Deutschland Kammer-spulenkoerper fuer den hochspannungstransformator eines fernsehempfaengers
DE4129678A1 (de) * 1991-09-06 1993-03-11 Thomson Brandt Gmbh Dioden-split-hochspannungstransformator fuer einen fernsehempfaenger
KR100235814B1 (ko) * 1991-08-22 1999-12-15 루엘랑 브리지뜨 텔레비젼 수상기용 다이오드 분배 고전압 변압기
EP0585597B1 (de) * 1992-08-04 1999-05-12 Deutsche Thomson-Brandt Gmbh Hochspannungs-Zeilentransformator für einen Fernsehempfänger
DE4300624A1 (de) * 1993-01-13 1994-07-14 Thomson Brandt Gmbh Dioden-Split-Hochspannungstransformator für einen Fernsehempfänger
DE19543673A1 (de) * 1995-11-23 1997-05-28 Thomson Brandt Gmbh Hochspannungstransformator für einen Fernsehempfänger
DE19510678A1 (de) * 1995-03-27 1996-10-02 Thomson Brandt Gmbh Hochspannungstransformator für einen Fernsehempfänger
FR2756967B1 (fr) * 1996-12-09 1999-01-08 Thomson Television Components Transformateur pour alimentation a haute frequence de decoupage
TW369654B (en) * 1997-07-07 1999-09-11 Thomson Brandt Gmbh Diode-split high-voltage transformer
WO2019009513A1 (ko) * 2017-07-04 2019-01-10 재단법인 대구경북과학기술원 선형 가변 차동 변환기

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2264451A1 (de) * 1971-11-18 1973-10-11 Matsushita Electric Ind Co Ltd Hochspannungstransformatorenanordnung fuer horizontalablenkschaltung. ausscheidung aus: 2256006
FR2207386A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1972-11-20 1974-06-14 Matsushita Electric Ind Co Ltd
US3904928A (en) * 1973-10-10 1975-09-09 Hitachi Ltd Flyback transformer
DE2848832A1 (de) * 1978-11-11 1980-05-22 Denki Onkyo Co Ltd Zeilenablenktransformator

Family Cites Families (15)

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Publication number Priority date Publication date Assignee Title
US1129474A (en) * 1909-08-02 1915-02-23 Westinghouse Electric & Mfg Co Transformer.
CH148868A (de) * 1929-06-08 1931-08-15 Koch & Sterzel Ag Hochspannungstransformator mit oberspannungsseitiger Scheibenwicklung.
US1912389A (en) * 1931-01-26 1933-06-06 Franklin S Smith Transformer construction and art of producing the same
US2116404A (en) * 1937-03-23 1938-05-03 Gen Electric Electrical induction apparatus
US3546580A (en) * 1967-06-06 1970-12-08 North American Rockwell Magnetic field variometer using a low noise amplifier and a coil-core arrangement of minimum weight and maximum sensitivity
US3657632A (en) * 1969-10-29 1972-04-18 Matsushita Electric Ind Co Ltd Rectifying device
JPS4859330A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1971-11-29 1973-08-20
US3866086A (en) 1972-06-28 1975-02-11 Matsushita Electric Ind Co Ltd Flyback transformer apparatus
JPS50141730U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1974-05-10 1975-11-21
JPS5122578U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1974-08-07 1976-02-19
US3947749A (en) * 1975-01-31 1976-03-30 Hitachi, Ltd. Apparatus for generating high voltage for cathode-ray tube
DE2607368A1 (de) 1976-02-24 1977-08-25 Licentia Gmbh Zeilentransformator fuer einen fernsehempfaenger
JPS6017968Y2 (ja) * 1976-08-31 1985-05-31 株式会社日立製作所 直流高圧発生装置
JPS5464924U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1977-10-18 1979-05-08
US4247889A (en) * 1979-02-23 1981-01-27 Blaupunkt-Werke Gmbh High-voltage-secondary transformer, particularly television line transformer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2264451A1 (de) * 1971-11-18 1973-10-11 Matsushita Electric Ind Co Ltd Hochspannungstransformatorenanordnung fuer horizontalablenkschaltung. ausscheidung aus: 2256006
FR2207386A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1972-11-20 1974-06-14 Matsushita Electric Ind Co Ltd
US3904928A (en) * 1973-10-10 1975-09-09 Hitachi Ltd Flyback transformer
DE2848832A1 (de) * 1978-11-11 1980-05-22 Denki Onkyo Co Ltd Zeilenablenktransformator

Also Published As

Publication number Publication date
ES8200803A1 (es) 1981-11-16
DE3001975A1 (de) 1981-07-23
JPH0338792B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1991-06-11
EP0033450A1 (de) 1981-08-12
DE3161388D1 (en) 1983-12-22
ATE5355T1 (de) 1983-12-15
ES498632A0 (es) 1981-11-16
US4406978A (en) 1983-09-27
JPS56109073A (en) 1981-08-29
HK103588A (en) 1988-12-30
BR8100290A (pt) 1981-08-04

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