EP0309837B1 - Transformator, insbesondere für ein Schaltnetzteil - Google Patents

Transformator, insbesondere für ein Schaltnetzteil Download PDF

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Publication number
EP0309837B1
EP0309837B1 EP88115254A EP88115254A EP0309837B1 EP 0309837 B1 EP0309837 B1 EP 0309837B1 EP 88115254 A EP88115254 A EP 88115254A EP 88115254 A EP88115254 A EP 88115254A EP 0309837 B1 EP0309837 B1 EP 0309837B1
Authority
EP
European Patent Office
Prior art keywords
winding
transformer
core
strands
winding sections
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 - Lifetime
Application number
EP88115254A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0309837A1 (de
Inventor
Drahoslav Dipl.-Ing. Zdarek
Walter Dipl.-Ing. Goseberg
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.)
EWD Electronic-Werke Deutschland GmbH
Original Assignee
EWD Electronic-Werke Deutschland 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 EWD Electronic-Werke Deutschland GmbH filed Critical EWD Electronic-Werke Deutschland GmbH
Priority to AT88115254T priority Critical patent/ATE83334T1/de
Publication of EP0309837A1 publication Critical patent/EP0309837A1/de
Application granted granted Critical
Publication of EP0309837B1 publication Critical patent/EP0309837B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • 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
    • H01F27/2823—Wires

Definitions

  • Switched-mode power supplies such as those used predominantly in television receivers, video recorders and the like, require a transformer which effects the galvanic isolation of the receiver circuit from the mains and supplies operating voltages of different sizes and polarities on the secondary side via rectifier circuits. It is known to synchronize switching power supplies with the line frequency of a television receiver. The switching power supply then operates at a frequency of approximately 16 kHz.
  • the invention has for its object to provide a transformer in which a winding consists of two parallel strands or wires to eliminate the skin effect, so that no equalizing currents occur in the parallel connection mentioned.
  • the solution according to the invention thus ensures that the two winding strands or wires connected in parallel are equivalent in terms of their position to the effective magnetic field of the transformer and thus the voltages induced in them are the same. If these voltages are the same, no equalizing currents can flow within the parallel connection of the two winding phases or wires, so that the losses caused by equalizing currents also do not occur.
  • the optimal arrangement of the partial windings can e.g. can be empirically determined by separating the parallel connection and, given a given field of the transformer, ensuring that the voltages induced in the two winding phases are the same.
  • the invention is particularly advantageous in connection with a chamber bobbin.
  • the partial windings which follow one another in the axial direction of the coil former lie in individual chambers of the chamber coil former.
  • the winding of a transformer lying between the terminals A and B contains a first winding phase with the partial windings 1a and 1b and a second winding phase with the partial windings 2a and 2b.
  • the two winding strands 1a, 1b and 2a, 2b are connected in parallel.
  • the partial windings 1a and 2b have a large distance from the core K and the partial windings 2a and 1b have a small distance.
  • the total number of turns of a winding strand is divided equally between the two partial windings. It can be seen that the two winding strands 1a, 1b and 2a, 2b are equivalent in position relative to the core K and the magnetic field.
  • Each winding strand lies with one half in the vicinity of the core K and with the other half further away from the core K. Due to this equivalent geometric position to the core K, the voltages induced in the two winding strands are also the same, so that in the winding 1a , 1b, 2b, 2a formed closed circuit no compensating current can flow.
  • the first winding phase contains three partial windings 1a, 1b, 1c and the second winding phase also contains three partial windings 2a, 2b, 2c.
  • the partial windings of the two strands are again arranged crosswise offset to the core as in FIG. 1 and therefore in their position relative to the magnetic field equivalent to.
  • Half of the winding strand 1, namely with the partial winding 1b is close to the core and the other half, namely with the partial windings 1a and 1c, is away from the core K.
  • the second winding strand 2 is located close to the core with half, namely the partial windings 2a and 2c, and with half, namely the partial winding 2b, from the core K.
  • the winding strand 1, with the partial windings 1a, 1c and 1e, is 1/6 of the total number of turns of the winding strand, i.e. half the total number of turns, away from the core and with the partial windings 1b and 1d each 1/4 of the total number of turns, that is also with half close to the core.
  • the partial windings 2b and 2d with 1/4 of the number of turns, that is also half of the total number of turns are located away from the core and with the partial windings 2a, 2c and 2e each with 1/6, i.e. also with half the total number of turns, close to each other Core.
  • the two winding strands 1a, 1b, 1c, 1d, 1e and 2a, 2b, 2c, 2d, 2e are therefore again equivalent in their position relative to the core and the magnetic field.
  • FIG. 4 shows an embodiment for a chamber coil former for a primary winding P and a secondary winding S.
  • the successive total of 11 chambers alternately contain a partial winding of the primary winding P and of the secondary winding S. All partial windings of P and S are again as in FIG. 1 - 3 arranged, ie they are alternately at a large and a small distance from the core.
  • the primary winding P formed by two winding strands with six partial windings each has the connection terminals A and B.
  • the secondary winding S formed by two winding strands each with five partial windings has the connection terminals C and B.
  • Such a nested arrangement of the primary winding and the secondary winding in a chamber bobbin for a switching power supply is known and described in more detail in DE-OS 31 29 381.
  • the overall winding according to FIG. 4 is preferably arranged in a chamber bobbin. This means that the successive partial windings of the primary winding P and the secondary winding S are accommodated in chambers of a chamber bobbin. In FIG. 4, therefore, the vertical lines between the partial windings P and S each represent the partitions of a chamber bobbin forming the chambers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Detergent Compositions (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
  • Power Conversion In General (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Television Receiver Circuits (AREA)
EP88115254A 1987-09-26 1988-09-17 Transformator, insbesondere für ein Schaltnetzteil Expired - Lifetime EP0309837B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88115254T ATE83334T1 (de) 1987-09-26 1988-09-17 Transformator, insbesondere fuer ein schaltnetzteil.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3732558 1987-09-26
DE19873732558 DE3732558A1 (de) 1987-09-26 1987-09-26 Transformator, insbesondere fuer ein schaltnetzteil

Publications (2)

Publication Number Publication Date
EP0309837A1 EP0309837A1 (de) 1989-04-05
EP0309837B1 true EP0309837B1 (de) 1992-12-09

Family

ID=6337002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88115254A Expired - Lifetime EP0309837B1 (de) 1987-09-26 1988-09-17 Transformator, insbesondere für ein Schaltnetzteil

Country Status (8)

Country Link
EP (1) EP0309837B1 (el)
JP (1) JPH01107508A (el)
KR (1) KR970004571B1 (el)
AT (1) ATE83334T1 (el)
DE (2) DE3732558A1 (el)
ES (1) ES2036644T3 (el)
FI (1) FI884385A (el)
GR (1) GR3007255T3 (el)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19545304A1 (de) * 1995-12-05 1997-06-12 Bosch Gmbh Robert Transformator mit aufgeteilter Primärwicklung in einer Sperrwandler-Versorgungsschaltung
JP3367427B2 (ja) * 1998-08-11 2003-01-14 株式会社高岳製作所 単相三線式変圧器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971291C (de) * 1941-10-28 1959-01-08 Telefunken Gmbh Hochfrequenz-Transformator fuer kurze Wellen
US4004251A (en) * 1975-11-03 1977-01-18 General Electric Company Inverter transformer
US4259716A (en) * 1978-02-06 1981-03-31 General Electric Company Transformer for use in a static inverter
JPS55107217A (en) * 1979-02-08 1980-08-16 Toshiba Corp Large current transformer
DE3129381A1 (de) * 1981-07-25 1983-02-10 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltnetzteil-transformator, insbesondere fuer einen fernsehempfaenger
DE3147984A1 (de) * 1981-12-04 1983-06-16 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Transformator, insbesondere fuer ein schaltnetzteil in einem fernsehempfaenger
DE3515706A1 (de) * 1985-05-02 1986-11-06 Newek Neue Elektronik Werke GmbH, 3000 Hannover Transformator fuer schaltnetzteil

Also Published As

Publication number Publication date
FI884385A0 (fi) 1988-09-23
JPH01107508A (ja) 1989-04-25
DE3876575D1 (de) 1993-01-21
EP0309837A1 (de) 1989-04-05
ATE83334T1 (de) 1992-12-15
KR890005778A (ko) 1989-05-17
DE3732558A1 (de) 1989-04-06
GR3007255T3 (el) 1993-07-30
KR970004571B1 (ko) 1997-03-29
FI884385A (fi) 1989-03-27
ES2036644T3 (es) 1993-06-01

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