EP0256583A1 - Transformateur muni d'un écran magnétique - Google Patents

Transformateur muni d'un écran magnétique Download PDF

Info

Publication number
EP0256583A1
EP0256583A1 EP87201407A EP87201407A EP0256583A1 EP 0256583 A1 EP0256583 A1 EP 0256583A1 EP 87201407 A EP87201407 A EP 87201407A EP 87201407 A EP87201407 A EP 87201407A EP 0256583 A1 EP0256583 A1 EP 0256583A1
Authority
EP
European Patent Office
Prior art keywords
metal strips
laminated core
transformer
sheet metal
leg
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Withdrawn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
EP87201407A
Other languages
German (de)
English (en)
Inventor
Ulrich Krieger
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 Corporate Intellectual Property GmbH
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 Corporate Intellectual Property GmbH, Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Corporate Intellectual Property GmbH
Publication of EP0256583A1 publication Critical patent/EP0256583A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
    • 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
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/361—Electric or magnetic shields or screens made of combinations of electrically conductive material and ferromagnetic material

Definitions

  • the invention relates to a transformer which has a three-leg laminated core with transformer windings wound around the middle leg and at least two closed sheet metal strips which serve for magnetic shielding and which are at a constant distance from one another transversely to the layering direction of the laminated core around its outer edges.
  • transformers intended for installation in high-volume devices should have a shield that can be produced economically.
  • the metal strips run transversely to the layering of the laminated core around its outer edges.
  • This object is achieved in that the sheet metal strips in a lateral, low magnetic field area of the laminated core are brought up to it and welded to it.
  • Such a design of the magnetic shielding sheet metal strips provides an essentially constant distance both between the sheet metal strips and between them and the laminated core of the transformer.
  • the approach of the metal strips in a lateral, low-magnetic field arm of the laminated core hardly disturbs the magnetic shielding effect of the metal strips, since the magnetic field is weak in this area anyway and hardly needs to be damped by means of the metal strips.
  • the metal strips are welded to one another in this area, so that in the other areas the metal strips are prevented from moving relative to one another and thus changes in the relative spacing of the metal strips are prevented. This advantage is achieved without additional spacers or the like between the metal strips.
  • the sheet metal strips are welded to the sheet bundle approximately in the middle of the longitudinal extent of the latter.
  • the magnetic field is relatively low in a central region of the longitudinal extent of the outer legs of the laminated core. It is therefore advantageous bring the metal strips in their areas to the outer legs of the laminated core and weld them to them. In this way, a more secure positioning of the metal strips relative to one another and relative to the laminated core is ensured.
  • Each of the metal strips will generally consist of a suitably shaped and bent into the desired shape, the ends of which are welded together.
  • a transformer is shown in view, which has a magnetic shield by means of two metal strips according to the invention.
  • the transformer 1 shown in the figure has a three-leg laminated core 2.
  • the laminated core 2 is stacked up from a series of individual laminations.
  • two legs 3 and 4 run in the outer region of the laminated core and a middle leg 5 in the inner region thereof.
  • This leg 5 extending in the inner region is provided with a plastic coil former 6, which serves to receive transformer windings which are wound around this plastic coil former 6 and thus run around the middle leg 5 of the laminated core 2.
  • the transformer windings with an electrically insulating sheath surrounding them are designated by 7 in the figure.
  • the transformer is functional with the laminated core and the transformer windings and connections of the windings, not shown in the figure.
  • Such a transformer would not be usable in many consumer electronics devices, however magnetic field would generate ripple voltages in your own electronic circuit or in neighboring devices.
  • the transformer l is therefore provided with two metal strips l0 and ll for its magnetic shielding.
  • the metal strips l0 and ll run at an approximately constant distance from one another transversely to the layering direction of the laminated core 2 around its outer edges l2.
  • the two metal strips l0 and ll also run at a constant distance relative to the outer edges of the laminated core 2. Only in a central region l5 of the longitudinal extent of the outer leg 4 of the laminated core and in a corresponding region l6 of the leg 3 are the two metal strips l0 and ll led to the outer sides of the legs 3 and 4.
  • the metal strips l0 and ll are connected in these areas by spot welds l7 to each other and to the legs 3 and 4 of the laminated core 2.
  • An approach of the two metal strips 10 and 11 in this area is not critical with regard to the effect of the magnetic shielding of the metal strips, since the magnetic field of the transformer is relatively small in this area.
  • both the sheet metal strip 10 and the sheet metal strip 11 are each made in one piece from a sheet metal strip.
  • the metal strips l0 and ll are pre-bent according to the desired shape.
  • the ends of a sheet metal strip are each connected to one another by spot welds l8.
  • the metal strips l0 and ll advantageously consist of a highly permeable, grain-oriented electrical sheet.
  • Such an arrangement of the magnetic shielding by means of two sheet metal strips arranged in the manner described above additionally offers the advantage with simple assembly that the position of the sheet metal strips is not impaired even in the case of external mechanical influences which are not too strong.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Coils Or Transformers For Communication (AREA)
EP87201407A 1986-08-16 1987-07-22 Transformateur muni d'un écran magnétique Withdrawn EP0256583A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3627889 1986-08-16
DE3627889 1986-08-16

Publications (1)

Publication Number Publication Date
EP0256583A1 true EP0256583A1 (fr) 1988-02-24

Family

ID=6307574

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87201407A Withdrawn EP0256583A1 (fr) 1986-08-16 1987-07-22 Transformateur muni d'un écran magnétique

Country Status (4)

Country Link
US (1) US4749979A (fr)
EP (1) EP0256583A1 (fr)
JP (1) JPS63239908A (fr)
KR (1) KR880003353A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103268803A (zh) * 2013-04-29 2013-08-28 曹增慧 能起保护作用的新型电感
WO2014197061A2 (fr) 2013-03-15 2014-12-11 United Technologies Corporation Trou de refroidissement de film formé de turbine à gaz
CN107093515A (zh) * 2016-02-18 2017-08-25 华为技术有限公司 一种电感、变压器及电气设备

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5149549A (en) * 1990-11-21 1992-09-22 American Colloid Company Method and composition for achieving animal weight gain with mycotoxin-contaminated animal food
US6028266A (en) * 1998-04-06 2000-02-22 Asea Brown Boveri Inc. Low frequency EMF shield
DE10211304A1 (de) * 2001-03-13 2003-01-09 Schulz Uwe Magnetfeldschirmung
US10262788B2 (en) 2013-12-12 2019-04-16 Koninklijke Philips N.V. Method to enable standard alternating current (AC)/direct current (DC) power adapters to operate in high magnetic fields

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1916352A (en) * 1932-02-02 1933-07-04 Leeds & Northrup Co Transformer
GB1220151A (en) * 1968-02-16 1971-01-20 Advance Electronics Ltd Magnetically screened inductance devices
GB2102631A (en) * 1981-07-04 1983-02-02 Philips Nv Transformer with a magnetic screen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1946885A1 (de) * 1968-09-24 1970-04-02 Elektrokovina Tovarna Elektrok Drosselspule oder Transformator
DE3207606C2 (de) * 1982-03-03 1984-10-18 Philips Patentverwaltung Gmbh, 2000 Hamburg Abschirmvorrichtung mit Toleranzausgleich an einem Netztransformator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1916352A (en) * 1932-02-02 1933-07-04 Leeds & Northrup Co Transformer
GB1220151A (en) * 1968-02-16 1971-01-20 Advance Electronics Ltd Magnetically screened inductance devices
GB2102631A (en) * 1981-07-04 1983-02-02 Philips Nv Transformer with a magnetic screen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014197061A2 (fr) 2013-03-15 2014-12-11 United Technologies Corporation Trou de refroidissement de film formé de turbine à gaz
CN103268803A (zh) * 2013-04-29 2013-08-28 曹增慧 能起保护作用的新型电感
CN103268803B (zh) * 2013-04-29 2016-06-08 曹增慧 能起保护作用的电感
CN107093515A (zh) * 2016-02-18 2017-08-25 华为技术有限公司 一种电感、变压器及电气设备

Also Published As

Publication number Publication date
JPS63239908A (ja) 1988-10-05
KR880003353A (ko) 1988-05-16
US4749979A (en) 1988-06-07

Similar Documents

Publication Publication Date Title
EP0393387A2 (fr) Agencement de bobines pour un appareil de détection inductive
DE102004025076B4 (de) Spulenanordnung und Verfahren zu deren Herstellung
EP0175069B1 (fr) Fabrication d'un élément inductif muni d'un noyau toroidal bobiné
DE1926007A1 (de) Dreiphasen-Drosselspule mit Magnetkern
EP0256583A1 (fr) Transformateur muni d'un écran magnétique
EP0133661A2 (fr) Petit transformateur
DE2748070C2 (de) Elektromagnetischer Meßwertgeber
EP0848261A2 (fr) Capteur pour la détection des champs magnétiques alternatives
DD290738A5 (de) Sende- und/oder empfangsspule aus mehrebenenleiterplatte
DE102004008961B4 (de) Spulenkörper für geschlossenen magnetischen Kern und daraus hergestellte Entstördrossel
DE1638885A1 (de) Hochspannungswicklung
EP0479966B1 (fr) Element de circuit inductif pour le montage de cartes imprimees
DE10042283A1 (de) Drosselspule
DE361873C (de) Eisenkern fuer Induktionsspulen
DE10009078C1 (de) Planartransformator in Multilayertechnik mit E-Kernen
DE2148475C3 (de) Hochfrequenzspule mit einer Drahtwicklung und einem gedruckten Wicklungsteil mit einer Anzapfung
EP0017019B1 (fr) Transformateur ou bobine réactance avec un enroulement à prises
EP0216249B1 (fr) Enroulement à haute tension fait de paires de bobines en disque disposées les unes sur les autres axialement
EP0061521B1 (fr) Corps d'écran pour culasses de noyaux de fer dans des transformateurs et dans des bobines de réactance
DE1638610C3 (de) Luftdrossel-Ringspule mit veränderlicher Induktivität
DE19609260C2 (de) Isolationsanordnung für rechteckige Wickeldrähte zur Herstellung von Wicklungen aus Scheibenspulen für Transformatoren und Drosseln
WO2022189603A1 (fr) Transformateur à noyau magnétique non fermé
DE1489968C (de) Magnetische Abschirmung für elektrische Bauelemente, insbesondere Übertrager, Transformatoren od. dgl
DE3141972A1 (de) Eisenkern fuer elektrische drosseln
DE3627890A1 (de) Transformator mit einer magnetischen abschirmung und verfahren zur herstellung einer solchen abschirmung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19880713

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19900201

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KRIEGER, ULRICH