WO1992010906A1 - Transformateur h.t. pour postes recepteurs de television - Google Patents

Transformateur h.t. pour postes recepteurs de television Download PDF

Info

Publication number
WO1992010906A1
WO1992010906A1 PCT/EP1991/002285 EP9102285W WO9210906A1 WO 1992010906 A1 WO1992010906 A1 WO 1992010906A1 EP 9102285 W EP9102285 W EP 9102285W WO 9210906 A1 WO9210906 A1 WO 9210906A1
Authority
WO
WIPO (PCT)
Prior art keywords
winding
chamber
transformer according
transformer
voltage
Prior art date
Application number
PCT/EP1991/002285
Other languages
German (de)
English (en)
Inventor
Walter Goseberg
Wolfgang Reichow
Hans-Werner Sander
Original Assignee
Deutsche Thomson-Brandt 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 Deutsche Thomson-Brandt Gmbh filed Critical Deutsche Thomson-Brandt Gmbh
Priority to EP91920765A priority Critical patent/EP0561839B1/fr
Priority to KR1019930701737A priority patent/KR100194191B1/ko
Priority to JP51869891A priority patent/JP3280965B2/ja
Priority to DE59108593T priority patent/DE59108593D1/de
Publication of WO1992010906A1 publication Critical patent/WO1992010906A1/fr
Priority to US08/417,482 priority patent/US5576681A/en

Links

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
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • 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 is based on a high-voltage transformer according to the preamble of claim 1.
  • a transformer is known from DE-OS 35 14 308.
  • Such transformers generate a high voltage for television receivers in the order of 25 kV.
  • the object of the invention is to reduce the power loss occurring at the transformer in such a high-voltage transformer. This object is achieved by the invention specified in claim 1. Advantageous developments of the invention are specified in the subclaims.
  • the invention is initially based on an analysis of the total loss types occurring in such a transformer.
  • a first type of loss consists in the ferrite losses due to magnetization of the core in accordance with the area formed by the hysteresis curve. Such losses can only be reduced by ferrite material of increased quality.
  • a second type of loss consists of copper losses due to the ohmic resistance of the wire and the skin effect.
  • a third type of loss consists in the losses in the high-voltage rectifier diodes, namely through the forward voltage and the forward current, the reverse voltage and the reverse current and the switch losses when switching from the blocked to the conductive state and vice versa.
  • a fourth type of loss consists in the dielectric losses due to displacement es currents in the dielectric generally formed by a potting resin.
  • the invention is based on the following consideration.
  • the dielectric losses occur in particular in the area between the primary winding and the secondary winding or high-voltage winding, because the greatest voltage differences exist here. If it is thus possible to make this area largely electrically field-free, the dielectric losses can be considerably reduced. In the invention, this is achieved only by a particularly advantageous division of the pulse voltages on the primary winding and on the secondary winding, in such a way that in the area mentioned on the primary winding and on the secondary winding, the pulses have approximately the same amplitude and polarity.
  • the difference in the impulse voltages on the two windings practically disappears, so that in the desired manner an electrically field-free space is achieved and losses due to dielectric displacement currents are avoided as far as possible.
  • a major advantage is that the field-free space is not achieved by additional means, but only by a clever arrangement of the parts that are required anyway.
  • the harmonic content of the generated voltages is also reduced by reducing the dielectric displacement currents in the dielectric surrounding the windings. This leads to fewer natural resonances that are otherwise triggered by displacement currents. This reduction in the harmonics causes an improvement in the internal resistance and also a reduction in the acoustic noises occurring at the transformer. Overall, the material surrounding the windings, preferably a cast resin, is also less stressed.
  • FIG. 1 shows the structural design of a high-voltage transformer according to the invention and
  • FIG. 2 shows an equivalent circuit diagram for the transformer according to FIG. 1.
  • the bobbin 7 is supported on the core 1, which carries the primary winding 3.
  • the primary winding 3 consists of six layers.
  • the winding end from the lower layer is connected to terminal b with the operating voltage + UB.
  • the end of the winding from the upper layer is connected to terminal d and to switching transistor 13, which is controlled at terminal c with a line-frequency switching voltage Z.
  • the pulse voltage at terminal b is zero.
  • the pulse voltage at terminal d has the full value of the return voltage of +1200 volts. The pulse voltage thus increases continuously from the value zero at terminal b to the maximum value at terminal d from winding to winding.
  • the pulse voltage decreases by about 16% over the axial length of the upper layer of winding 3 and the pulse voltage at the right end of the upper layer is +1000 volts.
  • the pulse voltage is therefore largely constant in the upper position of the winding 3 over the axial length of the coil former 7 and has an average value of 1100 volts.
  • the chamber coil former 2 Arranged above the coil former 7 with the primary winding 3 is the chamber coil former 2, which has a total of 16 chambers Ka to Kp formed by walls 8, which are filled with partial windings 4a to 4p of the secondary winding or high-voltage winding 4.
  • the winding end from the upper layer of the first partial winding 4a is connected to earth.
  • the winding end at the bottom of a chamber K is connected to the anode ner high-voltage rectifier diode 6, the cathode of which is connected in each case to the winding end from the upper end of the next partial winding 4.
  • the end of the winding from the bottom of the last partial winding 4p in the bracket Kp forms the high-voltage terminal a.
  • the winding process for the entire secondary winding 4 begins at the bottom of the chamber Kp. Since there is a diode 6 between each two chambers, a total of 15 diodes 6 are provided for a total of 16 chambers K. A high voltage UH of 32 kV develops at terminal a. With these assumed values, there is a pulse of +1100 volts at the bottom of a chamber K, which is the same size in all chambers. At the upper end of winding 4 there is a pulse of -1300 volts.
  • the high-voltage winding 4 also generates pulses with the constant amplitude of +1200 volts in the area assigned to the winding 3, that is to say in the area of the lower ends of the chambers.
  • the pulses on the winding 3 and on the winding 4 are also the same. There is therefore practically no voltage difference between the pulses on the winding 3 and the pulses on the winding 4, so that the electrically field-free space indicated by the dash-dotted line F results.
  • the upper end of the first winding 4a is grounded and therefore does not carry any pulse voltage, while on the other hand the lower end of the last winding 4p, which is grounded via the capacitance of the picture tube, likewise does not carry any pulse voltage.
  • the tension ratios of these two windings are therefore different from that of the other windings 4b to 4o.
  • the primary winding 3 is preferably wound from Lit ⁇ ze in order to keep the losses due to the skin effect low.
  • FIG. 2 shows the equivalent circuit diagram belonging to FIG. 1.
  • the capacitor 14, which is essentially formed by the anode coating of the picture tube 15, is connected to the terminal a carrying the high voltage UH. 1 corresponds to the first diode between the bottom of the chamber Ka and the winding end at the upper end of the chamber Kb.
  • the last diode 6p corresponds to the diode between the lower end of the winding of the chamber Ko and the upper winding end of the last chamber Kp.
  • the primary winding 3 it is also possible to divide the primary winding 3 into a plurality of partial windings which are axially adjacent to one another on the core 1 and are connected in parallel between the terminals b and d.
  • the amplitude at the upper layer of the primary winding 3 is different over the axial length. This can be taken into account in that the chambers Ka to Kp are filled accordingly differently, so that the pulses of the partial windings 4a to 4p each have different amplitudes at the bottom of the chamber.
  • the filling factor of the chambers K with the partial windings 4 would then decrease from the left to the right end of the coil formers 7.2 as the amplitude of the pulses at the upper position of the winding 3 also decreases, ie in FIG. 1 from +1200 volts to +1000 volts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Details Of Television Scanning (AREA)
  • Television Receiver Circuits (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

Dans des transformateurs H.T., notamment des transformateurs divisés à diodes, il est généralement nécessaire de réduire autant que possible les dimensions de l'ensemble du dispositif, pour des raisons de coût et de poids. De même, la déperdition de chaleur pendant le fonctionnement d'un tel transformateur H.T. doit être réduite jusqu'à ce que l'échauffement du transformateur n'atteigne pas une plage de température dans laquelle d'autres parties des circuits d'un poste récepteur de télévision soient endommagées ou affectées. L'objet de l'invention est de réduire les pertes d'un transformateur H.T., notamment de minimiser les pertes électriques. A cet effet, un espace à champ pratiquement nul est créé entre l'enroulement primaire et l'enroulement de haute tension d'un transformateur H.T. du type susmentionné. L'invention s'applique à des postes récepteurs de télévision, notamment des postes récepteurs à haute définition construits selon des normes de télévision de haute définition.
PCT/EP1991/002285 1990-12-10 1991-12-03 Transformateur h.t. pour postes recepteurs de television WO1992010906A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP91920765A EP0561839B1 (fr) 1990-12-10 1991-12-03 Transformateur h.t. pour postes recepteurs de television
KR1019930701737A KR100194191B1 (ko) 1990-12-10 1991-12-03 텔레비젼 수상기용 고전압 변환기
JP51869891A JP3280965B2 (ja) 1990-12-10 1991-12-03 テレビジョン受信機用高圧トランス
DE59108593T DE59108593D1 (de) 1990-12-10 1991-12-03 Hochspannungstransformator für einen fernsehempfänger
US08/417,482 US5576681A (en) 1990-12-10 1995-04-05 High voltage transformer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4039373.9 1990-12-10
DE4039373A DE4039373A1 (de) 1990-12-10 1990-12-10 Hochspannungstransformator

Publications (1)

Publication Number Publication Date
WO1992010906A1 true WO1992010906A1 (fr) 1992-06-25

Family

ID=6419986

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1991/002285 WO1992010906A1 (fr) 1990-12-10 1991-12-03 Transformateur h.t. pour postes recepteurs de television

Country Status (16)

Country Link
EP (1) EP0561839B1 (fr)
JP (1) JP3280965B2 (fr)
KR (1) KR100194191B1 (fr)
CA (1) CA2098100A1 (fr)
DE (2) DE4039373A1 (fr)
ES (1) ES2097823T3 (fr)
FI (1) FI932627A (fr)
HK (1) HK1000744A1 (fr)
HU (1) HUT64660A (fr)
MX (1) MX9102455A (fr)
MY (1) MY107209A (fr)
PT (1) PT99742B (fr)
SG (1) SG46549A1 (fr)
TR (1) TR25836A (fr)
WO (1) WO1992010906A1 (fr)
ZA (1) ZA919724B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0529418A1 (fr) * 1991-08-22 1993-03-03 Deutsche Thomson-Brandt GmbH Transformateur haute tension du type diode split pour un récepteur de télévision
EP0735552A1 (fr) * 1995-03-27 1996-10-02 Deutsche Thomson-Brandt Gmbh Transformateur à haute tension pour un récepteur de télévision
FR2783965A1 (fr) * 1998-09-30 2000-03-31 Thomson Television Components Transformateur haute tension
JP2013214582A (ja) * 2012-04-02 2013-10-17 Mitsubishi Electric Corp フライバックトランス

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4225692A1 (de) * 1992-08-04 1994-02-10 Thomson Brandt Gmbh Hochspannungs-Zeilentransformator für einen Fernsehempfänger
DE59309571D1 (de) * 1992-08-04 1999-06-17 Thomson Brandt Gmbh Hochspannungs-Zeilentransformator für einen Fernsehempfänger
DE19900111A1 (de) 1999-01-05 2000-07-06 Thomson Brandt Gmbh Diodensplitt-Hochspannungstransformator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665288A (en) * 1970-09-02 1972-05-23 Zenith Radio Corp Television sweep transformer
EP0047497A1 (fr) * 1980-09-10 1982-03-17 Blaupunkt-Werke GmbH Transformateur
FR2606205A1 (fr) * 1986-10-31 1988-05-06 Hitachi Ltd Dispositif generateur de haute tension en courant continu

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL159223C (fr) * 1973-10-10
JPS50109625A (fr) * 1974-02-04 1975-08-28
JPS60172319U (ja) * 1984-04-21 1985-11-15 株式会社村田製作所 フライバツクトランス
JP2951662B2 (ja) * 1987-05-27 1999-09-20 アールシーエー トムソン ライセンシング コーポレイシヨン ビデオ装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665288A (en) * 1970-09-02 1972-05-23 Zenith Radio Corp Television sweep transformer
EP0047497A1 (fr) * 1980-09-10 1982-03-17 Blaupunkt-Werke GmbH Transformateur
FR2606205A1 (fr) * 1986-10-31 1988-05-06 Hitachi Ltd Dispositif generateur de haute tension en courant continu

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0529418A1 (fr) * 1991-08-22 1993-03-03 Deutsche Thomson-Brandt GmbH Transformateur haute tension du type diode split pour un récepteur de télévision
WO1993004557A1 (fr) * 1991-08-22 1993-03-04 Deutsche Thomson-Brandt Gmbh Transformateur haute tension a diodes et a enroulements partiels pour recepteur de television
US5629589A (en) * 1991-08-22 1997-05-13 Deutsche Thomson-Brandt Gmbh Split-configuration high-voltage diode transformer for a TV receiver
EP0735552A1 (fr) * 1995-03-27 1996-10-02 Deutsche Thomson-Brandt Gmbh Transformateur à haute tension pour un récepteur de télévision
FR2783965A1 (fr) * 1998-09-30 2000-03-31 Thomson Television Components Transformateur haute tension
EP0991091A1 (fr) * 1998-09-30 2000-04-05 Thomson Television Components France Transformateur à haute tension
US6211766B1 (en) 1998-09-30 2001-04-03 Thomson Television Components France High voltage transformer
JP2013214582A (ja) * 2012-04-02 2013-10-17 Mitsubishi Electric Corp フライバックトランス

Also Published As

Publication number Publication date
SG46549A1 (en) 1998-02-20
TR25836A (tr) 1993-09-01
HK1000744A1 (en) 1998-04-24
PT99742A (pt) 1993-11-30
EP0561839B1 (fr) 1997-03-05
DE59108593D1 (de) 1997-04-10
DE4039373A1 (de) 1992-06-11
CA2098100A1 (fr) 1992-06-10
KR930703789A (ko) 1993-11-30
EP0561839A1 (fr) 1993-09-29
HU9301604D0 (en) 1993-09-28
ES2097823T3 (es) 1997-04-16
PT99742B (pt) 1999-02-26
KR100194191B1 (ko) 1999-06-15
HUT64660A (en) 1994-01-28
MX9102455A (es) 1992-06-01
MY107209A (en) 1995-10-31
JPH06503448A (ja) 1994-04-14
FI932627A0 (fi) 1993-06-09
ZA919724B (en) 1993-04-05
JP3280965B2 (ja) 2002-05-13
FI932627A (fi) 1993-06-09

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