EP0355298A2 - Entrefer dans un transformateur pour une alimentation à découpage - Google Patents

Entrefer dans un transformateur pour une alimentation à découpage Download PDF

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Publication number
EP0355298A2
EP0355298A2 EP89110974A EP89110974A EP0355298A2 EP 0355298 A2 EP0355298 A2 EP 0355298A2 EP 89110974 A EP89110974 A EP 89110974A EP 89110974 A EP89110974 A EP 89110974A EP 0355298 A2 EP0355298 A2 EP 0355298A2
Authority
EP
European Patent Office
Prior art keywords
air gap
transformer
switching power
power supply
ferrite core
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Withdrawn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
EP89110974A
Other languages
German (de)
English (en)
Other versions
EP0355298A3 (fr
Inventor
Günter GRUNDIG E.M.V. Elek. Mech. Luber
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.)
Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH
Original Assignee
Grundig EMV Elektromechanische Versuchsanstalt Max Grundig 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 Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH filed Critical Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH
Publication of EP0355298A2 publication Critical patent/EP0355298A2/fr
Publication of EP0355298A3 publication Critical patent/EP0355298A3/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Withdrawn legal-status Critical Current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
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/255—Magnetic cores made from particles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps

Definitions

  • the invention relates to the special configuration of an air gap in a transformer with a ferrite core, the stray magnetic field being spatially restricted.
  • the transformer according to the invention is particularly suitable for switching power supplies in television receivers.
  • the object of the invention is to design the air gap in a transformer for a switching power supply in such a way that a particularly low magnetic leakage flux is achieved.
  • transformers for switched-mode power supplies according to FIG. 1, it is necessary to provide one or more air gaps in the associated ferrite core 1, firstly in order to establish certain coupling ratios between the windings and secondly to avoid the magnetization of the ferrite core by saturation.
  • the air gap is therefore divided into a plurality of partial air gaps 5 between the core legs 2, 3 of the ferrite core in order to limit the magnetic stray field by inserting ferrite disks 4 which correspond to the material and cross section of the ferrite core, such that the addition of the lengths of the partial air gaps Length of the total required air gap corresponds.
  • the stray magnetic field is considerably restricted in space, and the eddy current losses in the adjacent windings are avoided.
  • a comb-shaped plastic part 6 according to FIG.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Regulation Of General Use Transformers (AREA)
EP89110974A 1988-08-26 1989-06-16 Entrefer dans un transformateur pour une alimentation à découpage Withdrawn EP0355298A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3828985 1988-08-26
DE19883828985 DE3828985C1 (fr) 1988-08-26 1988-08-26

Publications (2)

Publication Number Publication Date
EP0355298A2 true EP0355298A2 (fr) 1990-02-28
EP0355298A3 EP0355298A3 (fr) 1990-08-22

Family

ID=6361651

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89110974A Withdrawn EP0355298A3 (fr) 1988-08-26 1989-06-16 Entrefer dans un transformateur pour une alimentation à découpage

Country Status (2)

Country Link
EP (1) EP0355298A3 (fr)
DE (1) DE3828985C1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104021919A (zh) * 2014-05-09 2014-09-03 无锡晶磊电子有限公司 用于滤波电感器的块状组合磁芯
DE102017223322A1 (de) 2017-12-20 2019-06-27 Robert Bosch Gmbh Transformatorkern und Transformator
WO2020051077A1 (fr) * 2018-09-07 2020-03-12 Abb Schweiz Ag Plaque de réactance de fuite pour transformateur de puissance
EP4379757A1 (fr) * 2022-11-30 2024-06-05 Delta Electronics (Thailand) Public Co., Ltd. Composant magnétique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103680842B (zh) * 2013-12-03 2017-02-08 佛山市顺德区万信电子电器有限公司 一种可消涡流的软磁合金铁芯变压器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2037089A (en) * 1978-11-22 1980-07-02 Philips Nv Ferromagnetic core having a gap
EP0193057A2 (fr) * 1985-02-21 1986-09-03 Deutsche Thomson-Brandt GmbH Transformateur pour récepteur de télévision

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1080475A (en) * 1966-06-13 1967-08-23 British Lighting Ind Ltd A choke having a winding of foil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2037089A (en) * 1978-11-22 1980-07-02 Philips Nv Ferromagnetic core having a gap
EP0193057A2 (fr) * 1985-02-21 1986-09-03 Deutsche Thomson-Brandt GmbH Transformateur pour récepteur de télévision

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104021919A (zh) * 2014-05-09 2014-09-03 无锡晶磊电子有限公司 用于滤波电感器的块状组合磁芯
DE102017223322A1 (de) 2017-12-20 2019-06-27 Robert Bosch Gmbh Transformatorkern und Transformator
WO2019120882A1 (fr) 2017-12-20 2019-06-27 Robert Bosch Gmbh Noyau de transformateur et transformateur
CN111466002A (zh) * 2017-12-20 2020-07-28 罗伯特·博世有限公司 变压器铁芯和变压器
WO2020051077A1 (fr) * 2018-09-07 2020-03-12 Abb Schweiz Ag Plaque de réactance de fuite pour transformateur de puissance
CN112655059A (zh) * 2018-09-07 2021-04-13 Abb电网瑞士股份公司 用于电力变压器的漏抗板
US11139109B2 (en) 2018-09-07 2021-10-05 Abb Power Grids Switzerland Ag Leakage reactance plate for power transformer
EP4379757A1 (fr) * 2022-11-30 2024-06-05 Delta Electronics (Thailand) Public Co., Ltd. Composant magnétique

Also Published As

Publication number Publication date
DE3828985C1 (fr) 1989-09-14
EP0355298A3 (fr) 1990-08-22

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