EP0727794A1 - Transformator, insbesondere für Energiewandler, und Resonanzenergiewandler mit einem solchen Transformator - Google Patents

Transformator, insbesondere für Energiewandler, und Resonanzenergiewandler mit einem solchen Transformator Download PDF

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Publication number
EP0727794A1
EP0727794A1 EP96200430A EP96200430A EP0727794A1 EP 0727794 A1 EP0727794 A1 EP 0727794A1 EP 96200430 A EP96200430 A EP 96200430A EP 96200430 A EP96200430 A EP 96200430A EP 0727794 A1 EP0727794 A1 EP 0727794A1
Authority
EP
European Patent Office
Prior art keywords
transformer
branches
magnetic circuit
magnetic
air gap
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.)
Granted
Application number
EP96200430A
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English (en)
French (fr)
Other versions
EP0727794B1 (de
Inventor
Philippe Dupuy
Christophe Lefebvre
Jean-Luc Morato
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.)
Actia Automotive SA
Original Assignee
Actia 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 Actia SA filed Critical Actia SA
Publication of EP0727794A1 publication Critical patent/EP0727794A1/de
Application granted granted Critical
Publication of EP0727794B1 publication Critical patent/EP0727794B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/38—Auxiliary core members; Auxiliary coils or 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/346—Preventing or reducing 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F2027/348—Preventing eddy currents

Definitions

  • the invention relates to a transformer, in particular for an energy converter, comprising a primary winding and a secondary winding established on a magnetic circuit capable of channeling the flux from the primary winding to the secondary winding. It extends to a resonant energy converter provided with such a transformer.
  • the most common solution consists in making a casing around the magnetic circuit forming a closed external fiber which prevents the magnetic flux from leaking from radiating outside the transformer.
  • the advantage of such a solution is to limit the magnetic leakage flux by eliminating part of the latter.
  • it does not solve the problems linked to the existence of this magnetic leakage flux because it only makes it possible to minimize it but not to control it.
  • the present invention aims to overcome the drawbacks of transformers due to the existence of a magnetic leakage flux, and proposes to provide a transformer designed to allow the elimination of nuisance linked to this magnetic leakage flux.
  • Another object of the invention is to provide a resonant energy converter of simplified design compared to current resonant energy converters.
  • the invention relates, firstly, to a transformer whose magnetic circuit comprises at least three branches, called lateral and central (s), connected to each other, towards each of their ends, by two crosspieces.
  • Such a transformer therefore has the peculiarity of integrating, by its design, a leakage inductor whose flux is channeled in the material of the magnetic circuit, and whose characteristics can be adjusted according to the thickness and the section of the air gap.
  • the presence of the closed coil makes it possible to avoid radiation towards the outside of the leakage magnetic flux and therefore leads to a very precise determination of the characteristics of the inductor, even in the range of high frequencies in conversion d energy, i.e. frequencies above 10 kHz.
  • Such an invention thus makes it possible to eliminate the nuisances linked to the existence of the magnetic leakage flux, by using the latter so as to produce a controlled inductor, and leads to providing a component integrating the inductor and transformer functions which required, so far two separate components.
  • this design provides galvanic isolation and excellent dielectric strength performance.
  • patent DE 36 09617 describes a device in which two air gaps interrupt the magnetic circuit comprising the coils, and the common flux branch of which has no air gap. This device therefore constitutes a coupled circuit which cannot act as a transformer, and its teaching can in no way suggest the subject of the invention.
  • Patent DE 11 22627 describes, for its part, a magnetic amplifier whose primary and secondary windings are arranged on the same branch of the magnetic circuit, and comprising an air gap on another branch capable of generating a coupling on a third winding.
  • the primary and secondary windings are crossed by the same magnetic flux, and the air gap cannot therefore constitute a controlled inductor such as that of the invention, materialized by the difference in flux between primary and secondary.
  • One of the applications of the invention thus relates to the production of energy converters consisting of a transformer connected in series with a choke, and this invention extends to resonant energy converters incorporating a transformer as described above and at least one capacitor connected in series and / or in parallel with the transformer, the air gap of said transformer being adjusted so that the resulting choke is a resonance choke capable of obtaining a high frequency in energy conversion, that is to say a frequency greater than 10 kHz between the primary and secondary circuits.
  • Such a resonant energy converter has the advantage of being made up of a small number of components compared to current resonant energy converters, and has a lower cost price and a simplified design compared to the latter .
  • transformers shown schematically in Figures 2 to 4 have the distinction of integrating the functions of inductor and transformer which hitherto required two separate components.
  • Such transformers are particularly intended for the production of resonant energy converters, as shown diagrammatically in FIG. 1, comprising, in addition to said transformers, an electronic switch assembly I mounted on at least one capacitor C, and a rectifier stage plus loads R.
  • the air gap and the capacitance are adjusted so as to obtain a resonant frequency, that is to say a frequency greater than 10 kHz.
  • each of these transformers has a magnetic circuit 1 consisting of two identical elements 2, 3 adapted to be arranged in an inverted position relative to each other, said elements having the general shape transversely d 'an E of which one of the branches has a length shorter than that of the other branches.
  • the magnetic circuit 1 thus formed therefore comprises three parallel branches, a central branch 4 and two lateral branches 5, 6, connected to each other, towards each of their ends, by two sleepers 7, 8.
  • one of the branches of this magnetic circuit 1 comprises an air gap 9 forming a controlled leakage inductor, the characteristics of which can be adjusted as a function of the thickness and of the section of said air gap.
  • the elements 2, 3 of the magnetic circuit 1 can be designed so that the air gap 9 is formed, either in line with the central branch 4 ( Figure 2), or at right of one of the lateral branches, in Example 6 ( Figure 3).
  • the transformer also includes a primary winding 10 and a secondary winding 11 disposed respectively around the branches without air gap 9 and therefore mounted on a closed magnetic circuit with low magnetic reluctance compared to an open circuit comprising an air gap.
  • these primary 10 and secondary 11 windings are arranged respectively around the lateral branches 5, 6.
  • these primary windings 10 and secondary 11 are arranged respectively around the central branch 4 and one of the lateral branches 5.
  • the transformer finally comprises, a closed external turn 12 arranged around the magnetic circuit 1 and intended to avoid the radiation of the magnetic flux leaking outwards.
  • this external fiber can be constituted by a housing 12 made of a metallic material enclosing the magnetic circuit 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Dc-Dc Converters (AREA)
  • Regulation Of General Use Transformers (AREA)
EP19960200430 1995-02-20 1996-02-19 Transformator, insbesondere für Energiewandler, und Resonanzenergiewandler mit einem solchen Transformator Expired - Lifetime EP0727794B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9502027 1995-02-20
FR9502027A FR2730849B1 (fr) 1995-02-20 1995-02-20 Transformateur, notamment pour convertisseur d'energie, et convertisseur d'energie a resonnance dote d'un tel transformateur

Publications (2)

Publication Number Publication Date
EP0727794A1 true EP0727794A1 (de) 1996-08-21
EP0727794B1 EP0727794B1 (de) 1999-09-01

Family

ID=9476389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960200430 Expired - Lifetime EP0727794B1 (de) 1995-02-20 1996-02-19 Transformator, insbesondere für Energiewandler, und Resonanzenergiewandler mit einem solchen Transformator

Country Status (3)

Country Link
EP (1) EP0727794B1 (de)
DE (1) DE69603993T2 (de)
FR (1) FR2730849B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2759488A1 (fr) * 1997-02-07 1998-08-14 Hitachi Ltd Dispositif de protection contre les courants de foucault et transformateur triphase
EP2551860A4 (de) * 2010-03-25 2013-01-30 Panasonic Corp Wandler
CN111105925A (zh) * 2018-10-27 2020-05-05 杨勇 基于去磁电感滤波磁路的高压直流输电线感应取能装置及方法
EP3923307A4 (de) * 2019-08-14 2022-11-09 Huawei Digital Power Technologies Co., Ltd. Magnetische integrierte vorrichtung, leistungswandlerschaltung, ladegerät und elektrisches fahrzeug

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1122627B (de) * 1959-01-15 1962-01-25 Siemens Ag Anordnung zur Beeinflussung der Flussverteilung bei Kleintransformatoren, Drosselspulen kleiner Leistung, Messwandlern oder Induktivitaeten in einem mehr als zwei Schenkel aufweisendem Eisenkern in Abhaengigkeit von seiner primaeren Erregung
DE2036467A1 (de) * 1970-07-22 1972-02-03 Siemens Ag LC-Siebschaltung für Stromversorgungsgeräte mit Gleichspannungsausgang
EP0082421A1 (de) * 1981-12-23 1983-06-29 Siemens Aktiengesellschaft Geschirmter, in isolierende Vergussmasse eingebetteter Transformator für ein insbesondere bei höheren Frequenzen betriebenes Schaltnetzteil, insbesondere Sperrwandlernetzteil in einem Farbfernsehempfänger
DE3609617A1 (de) * 1986-03-21 1987-09-24 Thomson Brandt Gmbh Spulenkern

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1122627B (de) * 1959-01-15 1962-01-25 Siemens Ag Anordnung zur Beeinflussung der Flussverteilung bei Kleintransformatoren, Drosselspulen kleiner Leistung, Messwandlern oder Induktivitaeten in einem mehr als zwei Schenkel aufweisendem Eisenkern in Abhaengigkeit von seiner primaeren Erregung
DE2036467A1 (de) * 1970-07-22 1972-02-03 Siemens Ag LC-Siebschaltung für Stromversorgungsgeräte mit Gleichspannungsausgang
EP0082421A1 (de) * 1981-12-23 1983-06-29 Siemens Aktiengesellschaft Geschirmter, in isolierende Vergussmasse eingebetteter Transformator für ein insbesondere bei höheren Frequenzen betriebenes Schaltnetzteil, insbesondere Sperrwandlernetzteil in einem Farbfernsehempfänger
DE3609617A1 (de) * 1986-03-21 1987-09-24 Thomson Brandt Gmbh Spulenkern

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2759488A1 (fr) * 1997-02-07 1998-08-14 Hitachi Ltd Dispositif de protection contre les courants de foucault et transformateur triphase
CN1086502C (zh) * 1997-02-07 2002-06-19 株式会社日立制作所 涡流屏蔽装置和三相变压器
EP2551860A4 (de) * 2010-03-25 2013-01-30 Panasonic Corp Wandler
CN111105925A (zh) * 2018-10-27 2020-05-05 杨勇 基于去磁电感滤波磁路的高压直流输电线感应取能装置及方法
CN111105925B (zh) * 2018-10-27 2021-12-28 杨勇 基于去磁电感滤波磁路的高压直流输电线感应取能装置及方法
EP3923307A4 (de) * 2019-08-14 2022-11-09 Huawei Digital Power Technologies Co., Ltd. Magnetische integrierte vorrichtung, leistungswandlerschaltung, ladegerät und elektrisches fahrzeug
US11527354B2 (en) 2019-08-14 2022-12-13 Huawei Digital Power Technologies Co., Ltd. Magnetic integrated device, power conversion circuit, charger, and electric vehicle

Also Published As

Publication number Publication date
EP0727794B1 (de) 1999-09-01
FR2730849B1 (fr) 1997-05-09
DE69603993D1 (de) 1999-10-07
FR2730849A1 (fr) 1996-08-23
DE69603993T2 (de) 2000-05-18

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