EP0459570A1 - Inductance ou transformateur, en particulier pour dispositif d'alimentation de courant à découpage - Google Patents

Inductance ou transformateur, en particulier pour dispositif d'alimentation de courant à découpage Download PDF

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Publication number
EP0459570A1
EP0459570A1 EP91201233A EP91201233A EP0459570A1 EP 0459570 A1 EP0459570 A1 EP 0459570A1 EP 91201233 A EP91201233 A EP 91201233A EP 91201233 A EP91201233 A EP 91201233A EP 0459570 A1 EP0459570 A1 EP 0459570A1
Authority
EP
European Patent Office
Prior art keywords
core
air gap
inductance
ferrite
double
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Withdrawn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
EP91201233A
Other languages
German (de)
English (en)
Inventor
Burghard Dipl.-Ing. Krahl
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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 Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0459570A1 publication Critical patent/EP0459570A1/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Withdrawn legal-status Critical Current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
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type
    • H01F17/04—Fixed inductances of the signal type with magnetic core
    • H01F17/06—Fixed inductances of the signal type with magnetic core with core substantially closed in itself, e.g. toroid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type
    • H01F17/04—Fixed inductances of the signal type with magnetic core
    • H01F17/06—Fixed inductances of the signal type with magnetic core with core substantially closed in itself, e.g. toroid
    • H01F2017/067—Core with two or more holes to lead through conductor

Definitions

  • the invention relates to a choke or a transformer with a ferrite core provided with at least one winding.
  • Ferrite cores are used in particular for storage chokes or storage transformers in clocked power supply devices.
  • inductance profiles can be generated through an air gap. have low inductance values for small currents and low inductance values for high modulation. This can be achieved, for example, by using a stepped air gap.
  • a stepped air gap for example in the case of a ferrite ring core, an inductance curve arises which is composed of the inductance curve of a first ring core without an air gap and that of a second ring core with an air gap.
  • the introduction of a stepped air gap with a defined depth requires a high degree of precision in production.
  • the invention has for its object to provide a device of the type mentioned, the ferrite core can be produced in a simple and inexpensive manner is, the inductance profile in particular has the properties of a ferrite ring core with a stepped air gap.
  • the ferrite core is designed as a multi-hole core having at least one air gap, in particular as a double-hole core.
  • the air gap of a ferrite core formed in this way can be sawn in or cut in without this requiring any particular precision.
  • the same inductance curve is achieved as in the case of a ring core with a stepped air gap, without the need to introduce a stepped air gap with a precisely defined depth. With such an inductance curve, the saturation of the ferrite core can be shifted towards higher magnetization currents, for example.
  • the inductance profile of the ferrite core can be influenced in a targeted manner.
  • At least one air gap has an insert made of permanent magnetic material, a maximum of the inductance is achieved, for example, at high magnetizing currents.
  • FIG. 1 shows an embodiment of a ferrite core designed as a double-hole core.
  • FIG. 1 schematically shows an exemplary embodiment of a ferrite core 1 designed as a double-hole core.
  • the double-hole core 1 has an air gap 2, which can be introduced into the double-hole core in a simple manner by sawing or milling.
  • the air gap can also be pressed in another way, for example already during the manufacture of the ferrite core, before sintering.
  • the double-hole core 1 is composed of an inductance profile of a ring core 1a without an air gap and the inductance profile of a ring core 1b with a continuous air gap.
  • the overall behavior of the inductance profile of the double-hole core with an air gap thus corresponds to a ring core with a stepped air gap, without the complex manufacturing process or the precision in the production of a stepped air gap being necessary.
  • the double-hole core 1 offers a relatively large cross section with a small base area, which makes a small number of turns necessary.
  • the inductance profile of the double-hole core can be influenced in a targeted manner.
  • One way to change the inductance curve is to fill the air gap 2 with a permanent magnetic material.
  • curve 4 shows the inductance profile of a double-hole core without an air gap.
  • the inductance profile 4 corresponds to that of a ferrite core designed as a single-hole core (toroidal core), ie the inductance profile 4 of a double-hole core without an air gap shows a high inductance L at low magnetization currents I, but this decreases sharply with increasing magnetization current due to the saturation of the coil core.
  • Curve 5 shows the inductance curve of a double-hole core in accordance with the exemplary embodiment shown in FIG.
  • a core half has an air gap.
  • the inductance remains constant after a maximum at low magnetization currents I over a wide range and only shows a decrease in the inductance at higher magnetization currents I, ie the saturation is shifted towards higher magnetization currents I compared to curve 4.
  • This corresponds to the inductance profile of a ferrite core with a stepped air gap designed as a ring core.
  • Curve 6 shows the inductance curve of a double-hole core, in which both core halves 1a, 1b (Fig. 1) each have an air gap. This corresponds to the inductance curve of a ferrite core with a continuous air gap.
  • Curve 7 shows the inductance curve of a double-hole core, in which one core half (FIG.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Soft Magnetic Materials (AREA)
EP91201233A 1990-05-30 1991-05-24 Inductance ou transformateur, en particulier pour dispositif d'alimentation de courant à découpage Withdrawn EP0459570A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904017323 DE4017323A1 (de) 1990-05-30 1990-05-30 Ferritkern fuer getaktete stromversorgungseinrichtungen
DE4017323 1990-05-30

Publications (1)

Publication Number Publication Date
EP0459570A1 true EP0459570A1 (fr) 1991-12-04

Family

ID=6407440

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91201233A Withdrawn EP0459570A1 (fr) 1990-05-30 1991-05-24 Inductance ou transformateur, en particulier pour dispositif d'alimentation de courant à découpage

Country Status (3)

Country Link
EP (1) EP0459570A1 (fr)
JP (1) JPH04230009A (fr)
DE (1) DE4017323A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0652573A3 (fr) * 1993-11-08 1996-05-29 Chrysler Corp Transformateur d'allumage.
EP0803732A3 (fr) * 1996-04-25 1999-04-21 Schlumberger Industries, Inc. Noyau laminé en forme de 8 pour compteur d'électricité
EP1835604A1 (fr) * 2006-03-16 2007-09-19 STMicroelectronics S.r.l. Noyau magnétique pour une inductance couplée pour un filtre avec multiples bobines
CN109273199A (zh) * 2017-07-18 2019-01-25 罗伯特·博世有限公司 除干扰系统，电驱动装置和电动手持式工具机
CN109920620A (zh) * 2019-03-28 2019-06-21 罗山县三通达电子科技有限公司 一种消除静电干扰的共模扼流圈
CN112041950A (zh) * 2018-03-20 2020-12-04 株式会社自动网络技术研究所 电抗器

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1015533B (de) * 1955-09-15 1957-09-12 Siemens Ag Saugdrosselanordnung mit grossem Stabilitaetsbereich

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1015533B (de) * 1955-09-15 1957-09-12 Siemens Ag Saugdrosselanordnung mit grossem Stabilitaetsbereich

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0652573A3 (fr) * 1993-11-08 1996-05-29 Chrysler Corp Transformateur d'allumage.
EP0803732A3 (fr) * 1996-04-25 1999-04-21 Schlumberger Industries, Inc. Noyau laminé en forme de 8 pour compteur d'électricité
EP1835604A1 (fr) * 2006-03-16 2007-09-19 STMicroelectronics S.r.l. Noyau magnétique pour une inductance couplée pour un filtre avec multiples bobines
CN109273199A (zh) * 2017-07-18 2019-01-25 罗伯特·博世有限公司 除干扰系统，电驱动装置和电动手持式工具机
CN112041950A (zh) * 2018-03-20 2020-12-04 株式会社自动网络技术研究所 电抗器
CN112041950B (zh) * 2018-03-20 2022-05-17 株式会社自动网络技术研究所 电抗器
CN109920620A (zh) * 2019-03-28 2019-06-21 罗山县三通达电子科技有限公司 一种消除静电干扰的共模扼流圈
CN109920620B (zh) * 2019-03-28 2024-03-29 罗山县三通达电子科技有限公司 一种消除静电干扰的共模扼流圈

Also Published As

Publication number Publication date
JPH04230009A (ja) 1992-08-19
DE4017323A1 (de) 1991-12-05

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