DE2514583A1 - Case for screening instruments against magnetic stray fields - is made by insertion into each other of hollow rectangular metal units to form multilayer surround - Google Patents

Case for screening instruments against magnetic stray fields - is made by insertion into each other of hollow rectangular metal units to form multilayer surround

Info

Publication number
DE2514583A1
DE2514583A1 DE19752514583 DE2514583A DE2514583A1 DE 2514583 A1 DE2514583 A1 DE 2514583A1 DE 19752514583 DE19752514583 DE 19752514583 DE 2514583 A DE2514583 A DE 2514583A DE 2514583 A1 DE2514583 A1 DE 2514583A1
Authority
DE
Germany
Prior art keywords
copper
hollow profiles
axes
axis
units
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Withdrawn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
DE19752514583
Other languages
German (de)
Inventor
Peter Dipl Ing Fasko
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of DE2514583A1 publication Critical patent/DE2514583A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0075—Magnetic shielding materials
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

The rectangular units may be open topped boxes which nest inside each other with their axes at 90 deg. Altogether four hollow units are provided; the innermost unit is made of copper, and the other, outer units of a high permeability soft magnetic alloy, consisting of 76% nickel, 17% iron, 5% copper, 2% chromium and at most 0.1% of carbon; the axis of the copper unit is parallel to the axis of highest magnetic sensitivity of a component mounted in the screening case; axes of the remaining units are in turns parallel to the three spatial axes of a rectangular coordinate system.

Description

Abschirmgehäuse Die Erfindung bezieht sich auf ein Gehäuse entsprechend dem Oberbegriff aes Hauptanspruches.Shielding case The invention relates to a case accordingly the preamble of aes main claim.

Ein solches Abschirmgehäuse ist z.3. aus dem DT-Gbm 1 920 766 bekannt.Such a shield case is z.3. known from DT-Gbm 1 920 766.

Aufgabe der Erfindung ist es, ein Abschirmgehäuse dieser Art so weiterzubilden, daß ein über größere Frequenzbereiche noch weitgehender linearisiertes Abschirmverhalten bei einem solchen Gehäuse erzielt werden kann.The object of the invention is to develop a shielding housing of this type in such a way that that a more extensive linearized shielding behavior over larger frequency ranges can be achieved with such a housing.

Erfindungsgemäß ergibt sich die Lösung dieser Aufgabe durch eine den Merkmalen des Hauptanspruches entsprechende Ausbildung eines solchen Gehäuses.According to the invention, this object is achieved by a Features of the main claim corresponding training of such a housing.

Eine weitere Ausgestaltung der Erfindung ergibt sich aus den Merkmalen des Anspruches 2.Another embodiment of the invention results from the features of claim 2.

Anhand einer Fig. wird ein Ausfühnungsbeispiel der Erfindung noch näher erläutert.An exemplary embodiment of the invention is illustrated with the aid of a figure explained in more detail.

Ein Transformator T ist in einem Abschirmgehäuse angeordnet, das durch Ineinanderschachtelung von metallischen Hohlprofilen 1 bis 4 mit jeweils rechteckigem Querschnitt gebildet ist. Hierbei entsprechen die Außenmaße eines weiter innen gelegenen Nohlprofiles, z.B. des Hohlprofiles 2 im wesentlichen den Innenmaßen eines nächstfolgenden, weiter außen gelegenen Hohlprofiles, z.B. des Hohlprofiles 3.A transformer T is arranged in a shielding housing, which is through Nesting of metallic hollow profiles 1 to 4, each with a rectangular one Cross-section is formed. The external dimensions correspond to one located further inside Nohl profile, e.g. of the hollow profile 2 essentially the internal dimensions of the next, Hollow profile located further outside, e.g. hollow profile 3.

Das innerste Hohlprofil 1 ist aus Kupfer hergestellt und mit seiner Achse parallel zur Spulenachse des Transformators T gerichtet.The innermost hollow profile 1 is made of copper and with his Axis directed parallel to the coil axis of the transformer T.

Die drei äußeren Hohlprofile 2 bis 4 sind mit ihren Achsen alternierend parallel zu den drei Raumachsen eines kartesischen Koordinatensystems ausgerichtet, so daß also die Achse des äußeren Hohlprofiles 4 parallel zur Achse des aus Kupfer bestehenden innersten Hohlprofiles 1 verläuft. Die als Abschirmelemente wirksamen einzelnen Hohlprofile bewirken abschnittweise eine Linearisierung der Dämpfungskennlinie des Abschirmgehäuses in den einzelnen Frequenzbereichen, unter gleichzeitiger Anhebung der Dämpfungskennlinie, wobei die Hohlprofile in ihrem Dämpfungsverhalten an die proportional zur Frequenz und Indtiktion ansteigenden Wirbelstromverluste angepaßt sind.The three outer hollow profiles 2 to 4 are alternating with their axes aligned parallel to the three spatial axes of a Cartesian coordinate system, so that the axis of the outer hollow profile 4 is parallel to the axis of the copper existing innermost hollow profile 1 runs. The effective as shielding elements individual hollow profiles effect a linearization of the damping characteristic in sections of the shielding housing in the individual frequency ranges, with simultaneous increase the damping characteristic, the hollow profiles in their damping behavior to the adjusted proportionally to the frequency and induction of increasing eddy current losses are.

Die Linearisierung der Dämpfungskennlinie wird insbesondere auch dadurch bewirkt, daß das innerste den Transformator T umgebende Hohlprofil 1 aus Kupfer besteht. Die anderen äußeren Hohlprofile 2, 3 und 4 bestehen demgegenüber aus einer weichmagnetischen Legierung hoher Permeabilität, wie sie unter dem Namen Mu-Metall allgemein bekannt ist und die sich ungefähr aus 76 % Nickel, 17 % Eisen, 5 % Kupfer, 2 % Chrom, sowie maximal 0,1 % Kohlenstoff zusammensetzt.The linearization of the damping characteristic is in particular also thereby causes the innermost hollow profile 1 surrounding the transformer T made of copper consists. The other outer hollow profiles 2, 3 and 4, on the other hand, consist of one soft magnetic alloy of high permeability, such as those under the name mu-metal is well known and consists of approximately 76% nickel, 17% iron, 5% copper, 2% chromium and a maximum of 0.1% carbon.

Die Hohlprofile können mit Ausschnitten A versehen sein, durch die ein Anschlußkabel des Transformators T hindurchgeführt werden kann.The hollow profiles can be provided with cutouts A through which a connection cable of the transformer T can be passed through.

Davon abweichend können jedoch aber auch die Abmessungen der Hohlprofile so gewählt werden, daß ein Anschlußkabel bzw. Zuleitungen für den Transformator T zwischen den mit entsprechender Toleranzineinandergeschachtelten Hohlprofilen geführt werden können.However, the dimensions of the hollow profiles can also deviate from this be chosen so that a connection cable or supply lines for the transformer T between the hollow profiles nested one inside the other with a corresponding tolerance can be guided.

Die Hohlprofile 1 bis 4 können unterschiedlich hergestellt sein.The hollow profiles 1 to 4 can be produced in different ways.

Beispielsweise hat es sich als zweckmäßig eraziesen, das aus Kupfer bestehende Hohlprofil 1 durch Wickeln eines Kupferbandes zu einem prismatischen Rohr zu erzeugen, wobei die offene Kante des Bandes verlötet wird. Die aus sog. Nu-Metall hergestellten anderen Hohlprofile 2 bis 4 können ebenfalls aus einem Metallband gewickelt sein, Hierbei können jedoch die offenen Kanten durch Punktschweissung miteinander verbunden werdeff.- Die Abschirmwirkung des aus Kupfer bestehenden Hohlprofiles 1 entfaltet sich insbesondere in höheren Frequenzbereichen und beruht auf der Wirkung von Wirbelströmen, die durch ein abzuschirmendes magnetisches Streufeld in diesem Hohlprofil erzeugt werden und wodurch dem Streufeld Energie entzogen wird. Demgegenüber bewirken die aus sog. Mu-Metall bestehenden Hohlprofile 2 bis 4 einen Kurzschluß der Feldlinien magnetischer Streufelder und vermindern dadurch den "Durchgriff" solcher Felder ins Innere des Abschirmgehäuses.For example, it has proven expedient to use the one made of copper existing hollow profile 1 by winding a copper tape into a prismatic one To create tube, where the open edge of the tape is soldered. The so-called Nu-Metal produced other hollow profiles 2 to 4 can also be made from a metal strip be wound, but the open edges can be spot welded connected to each other The shielding effect of the copper existing hollow profile 1 unfolds in particular in higher frequency ranges and is based on the effect of eddy currents generated by a magnetic shield Stray field are generated in this hollow profile and thus the stray field energy is withdrawn. In contrast, the hollow profiles made of so-called mu-metal have an effect 2 to 4 short-circuit the field lines of stray magnetic fields and reduce them thereby the "penetration" of such fields into the interior of the shielding housing.

2 Patentansprüche 1 Figur2 claims 1 figure

Claims (2)

Patentansprüche 1. Durch Ineinanderschachtelung von metallischen Hohlprofilen mit rechteckigem Ouerschnitt gebildetes Abschirmgehäuse gegen @@@-netische Streufelder, bei dem die Achsen der ineinandergeschachtelten Hohlprofile um 90° gegeneinander versetzt sind, d a d u r c h g e k e n n z e i c h n e t , daß insgg@amt vier Hohlprofile (1,2,3,4) vorgesehen sind und daß das in@uste (1) der Hohlprofile aus Kupfer und die anderen, äußeren ein llprofile (2,3,4) aus einer weichmagnetischen Legierung hoher Pereleabilitit mit der ungefähren Zusatnrnensetzung aus 76 @ Nickel, 17 % Eisen, 5 % Kupfer, 2 % Chrom, sowie maximal 0,1 Kohlenstoff bestehen. Claims 1. By nesting metallic Shielding housing made of hollow profiles with a rectangular cross-section against @@@ - netic Stray fields in which the axes of the nested hollow profiles are rotated by 90 ° are offset from one another, that is to say, that a total of four hollow profiles (1,2,3,4) are provided and that the in @ uste (1) of the hollow profiles made of copper and the other, outer one llprofile (2,3,4) made of a soft magnetic Alloy of high pereleability with the approximate addition of 76 @ nickel, 17% iron, 5% copper, 2% chromium and a maximum of 0.1 carbon. 2. Gehäuse nach Anspruch 1, d a d u r c h g e k e n n n z e i c h n e t , daß die Achse des aus Kupfer bestehenden innersten Hohlprofiles (1) parallel zur achse größter magnetischer Empfindlichkeit eines in den Abschirmgehäuse angeordneten Bauteiles gerichtet ist und daß die Achsen der andere äußeren Hohlprofile (2,3,4) alternierend parallel zu den drei Raumachsen eines kartesischen Koordinatensystems gerichtet sind. 2. Housing according to claim 1, d a d u r c h g e k e n n n z e i c h n e t that the axis of the innermost hollow profile (1) made of copper is parallel to the axis of greatest magnetic sensitivity of a arranged in the shielding housing Component is directed and that the axes of the other outer hollow profiles (2,3,4) alternating parallel to the three spatial axes of a Cartesian coordinate system are directed.
DE19752514583 1974-04-12 1975-04-03 Case for screening instruments against magnetic stray fields - is made by insertion into each other of hollow rectangular metal units to form multilayer surround Withdrawn DE2514583A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT308074A AT328551B (en) 1974-04-12 1974-04-12 BROADBAND SHIELDING AGAINST MAGNETIC FLOW

Publications (1)

Publication Number Publication Date
DE2514583A1 true DE2514583A1 (en) 1975-10-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752514583 Withdrawn DE2514583A1 (en) 1974-04-12 1975-04-03 Case for screening instruments against magnetic stray fields - is made by insertion into each other of hollow rectangular metal units to form multilayer surround

Country Status (2)

Country Link
AT (1) AT328551B (en)
DE (1) DE2514583A1 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2404890A1 (en) * 1977-09-30 1979-04-27 Ibm IMPROVED BUBBLE MEMORY CONTROL SYSTEM
FR2522872A1 (en) * 1982-03-03 1983-09-09 Philips Nv SECTOR TRANSFORMER
EP0191392A2 (en) * 1985-02-15 1986-08-20 Siemens Aktiengesellschaft Magnetic field-generating device
CH659138A5 (en) * 1982-10-27 1986-12-31 Landis & Gyr Ag Arrangement for measuring the current flowing in an electrical conductor via the magnetic field generated by it
EP0437313A1 (en) * 1990-01-08 1991-07-17 Nec Corporation Shield case structure for an electronic device
EP0452228A1 (en) * 1990-04-11 1991-10-16 Merlin Gerin Protector relay for medium high voltage network
DE19512266A1 (en) * 1994-09-23 1996-03-28 Rainer Jacob Facility for protection against manipulation e.g. for motor vehicle electronic circuits
DE10125327A1 (en) * 2001-03-02 2002-09-19 Draeger Medical Inc Transformer protection assembly for use in magnetic resonance sensing system, has magnetic shield which encloses pair of step-up transformers to prevent ambient magnetic flux interference with transformers
DE10164716A1 (en) * 2001-03-02 2002-11-28 Draeger Medical Inc Transformer protection assembly for use in magnetic resonance sensing system, has magnetic shield which encloses pair of step-up transformers to prevent ambient magnetic flux interference with transformers
EP1274103A1 (en) * 2001-07-03 2003-01-08 CFW EMV-Consulting AG Shielding to reduce the leakage flux or the stray field produced by an object
US6564084B2 (en) 2001-03-02 2003-05-13 Draeger Medical, Inc. Magnetic field shielding and detecting device and method thereof
DE102015202662A1 (en) * 2015-02-13 2016-08-18 Continental Automotive Gmbh Electrical component
CN106184123A (en) * 2016-07-21 2016-12-07 中交信通（天津）科技有限公司 A kind of vehicle-mounted antitheft alarm device based on dipper system

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2404890A1 (en) * 1977-09-30 1979-04-27 Ibm IMPROVED BUBBLE MEMORY CONTROL SYSTEM
FR2522872A1 (en) * 1982-03-03 1983-09-09 Philips Nv SECTOR TRANSFORMER
CH659138A5 (en) * 1982-10-27 1986-12-31 Landis & Gyr Ag Arrangement for measuring the current flowing in an electrical conductor via the magnetic field generated by it
EP0191392A2 (en) * 1985-02-15 1986-08-20 Siemens Aktiengesellschaft Magnetic field-generating device
EP0191392A3 (en) * 1985-02-15 1986-12-10 Siemens Aktiengesellschaft Berlin Und Munchen Magnetic field-generating device
EP0437313A1 (en) * 1990-01-08 1991-07-17 Nec Corporation Shield case structure for an electronic device
EP0452228A1 (en) * 1990-04-11 1991-10-16 Merlin Gerin Protector relay for medium high voltage network
FR2661052A1 (en) * 1990-04-11 1991-10-18 Merlin Gerin PROTECTION RELAY OF A MEDIUM VOLTAGE ELECTRICAL NETWORK.
DE19512266A1 (en) * 1994-09-23 1996-03-28 Rainer Jacob Facility for protection against manipulation e.g. for motor vehicle electronic circuits
DE19512266C2 (en) * 1994-09-23 1998-11-19 Rainer Jacob Anti-theft system for vehicles
DE10125327A1 (en) * 2001-03-02 2002-09-19 Draeger Medical Inc Transformer protection assembly for use in magnetic resonance sensing system, has magnetic shield which encloses pair of step-up transformers to prevent ambient magnetic flux interference with transformers
DE10164716A1 (en) * 2001-03-02 2002-11-28 Draeger Medical Inc Transformer protection assembly for use in magnetic resonance sensing system, has magnetic shield which encloses pair of step-up transformers to prevent ambient magnetic flux interference with transformers
DE10125327C2 (en) * 2001-03-02 2003-02-27 Draeger Medical Inc Device and method for protecting against magnetic fields
US6564084B2 (en) 2001-03-02 2003-05-13 Draeger Medical, Inc. Magnetic field shielding and detecting device and method thereof
DE10164716C2 (en) * 2001-03-02 2003-06-18 Draeger Medical Inc housing arrangement
EP1274103A1 (en) * 2001-07-03 2003-01-08 CFW EMV-Consulting AG Shielding to reduce the leakage flux or the stray field produced by an object
DE102015202662A1 (en) * 2015-02-13 2016-08-18 Continental Automotive Gmbh Electrical component
CN106184123A (en) * 2016-07-21 2016-12-07 中交信通（天津）科技有限公司 A kind of vehicle-mounted antitheft alarm device based on dipper system

Also Published As

Publication number Publication date
AT328551B (en) 1976-03-25
ATA308074A (en) 1975-06-15

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