EP0585650B1 - Transducteur et son application - Google Patents

Transducteur et son application Download PDF

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Publication number
EP0585650B1
EP0585650B1 EP93112626A EP93112626A EP0585650B1 EP 0585650 B1 EP0585650 B1 EP 0585650B1 EP 93112626 A EP93112626 A EP 93112626A EP 93112626 A EP93112626 A EP 93112626A EP 0585650 B1 EP0585650 B1 EP 0585650B1
Authority
EP
European Patent Office
Prior art keywords
core
transformer
transformer according
insulation
insulation compound
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.)
Expired - Lifetime
Application number
EP93112626A
Other languages
German (de)
English (en)
Other versions
EP0585650A1 (fr
Inventor
Volker Dipl.-Ing. Scherb
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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
Priority claimed from DE4227890A external-priority patent/DE4227890A1/de
Priority claimed from DE4227891A external-priority patent/DE4227891A1/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0585650A1 publication Critical patent/EP0585650A1/fr
Application granted granted Critical
Publication of EP0585650B1 publication Critical patent/EP0585650B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/327—Encapsulating or impregnating
    • 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
    • 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
    • H01F27/363—Electric or magnetic shields or screens made of electrically conductive material

Definitions

  • the invention relates to a transformer according to the Preamble of claim 1.
  • From US 4,176,334-A is a transformer for generating High voltages known, the windings in one Isolation mass are embedded.
  • the secondary windings of the Transformers are each in separate bobbins arranged side by side. Primary and secondary windings are separated from each other by shielding, which in the Isolation compound are also embedded.
  • DE 31 00 419 C2 is a high-voltage transformer known in the primary and secondary winding through Isolation means (sealing compound) are separated from each other and between them - here concentric to the winding core - one on Mass laid longitudinally slotted, cylindrical Metal screen is arranged. Via this metal screen heat dissipation from the windings.
  • the object of the present invention is to convert the transformer to form the preamble of claim 1 so that a Sufficient rollover security, especially for the Operation in different pressure ranges is guaranteed. This object is achieved by the measures of claim 1 solved.
  • the other claims show advantageous Further training or possible uses.
  • the measure of claim 2 ensures that the Isolation mass despite the one-sided attachment to only one Core fluctuation even during accelerations (start phase of the Satellites) cannot move.
  • the shielding according to Claim 3 also inhibits the risk of rollover and provides for discharges in the intermediate pressure range controlled routes.
  • Through the measures according to Claim 4 ensures that crack growth as a result different coefficients of thermal expansion effective is suppressed. In particular, a replacement of the Shielding from the insulation ground prevented, since the Multilayer is flexible and as a result of similar Expansion coefficients of their outer layers to the adjacent Isolation mass no mechanical stresses occur.
  • the shielding can no longer trigger cracks, especially at low temperatures.
  • Current transformers known to date cannot be operated easily in the Paschen minimum, since glow discharges can occur which, when using the current transformer in a control circuit, have a disruptive effect on the controlled variable transformed by the transformer.
  • the anode voltage is no longer constant. In addition, the efficiency of the entire power supply circuit drops.
  • FIG. 1 shows a transformer according to the invention.
  • This transformer has a three-legged core, the the transformer windings w1 and w2 except for side windows completely encloses.
  • the transformer windings w1 and w2 are placed side by side on a bobbin SK arranged, which to the winding core KE as a middle leg runs concentrically.
  • the coil former SK has in each case Area of the winding ends projections VS so that Winding chambers arise that the transformer windings w1, w2 except for the surfaces facing away from the winding core KE completely surrounded.
  • the two transformer windings w1 and w2 are separated from each other by a shield S, which in 1 above the chamber outer wall of the Coil body SK is arranged for the transformer winding w2.
  • This shield S consists of a disc-shaped ring (Fig. 2) in the form of a multilayer.
  • This multilayer has one electrically conductive layer ES, e.g. a copper layer on top which is arranged between two insulating outer layers AS is. 2 shows, the conductive layer ES is by a Short circuit isolating slot KT interrupted.
  • the coil former SK together with the transformer windings w1 and w2 and the Shield connection S is embedded in an insulation compound VM in such a way that this insulation mass VM is all external Parts protrudes by about 10% and a cylindrical ring-shaped Composite body is formed.
  • a potting compound is suitable as an insulation compound Epoxy resin, which may be glass fiber reinforced or with other inorganic materials can be filled (cf. netz Volume 105 (1984) Issue 9, page 441 or US 4,176,334 "epoxy-glass laminate").
  • Epoxy resin which may be glass fiber reinforced or with other inorganic materials can be filled (cf. netz Volume 105 (1984) Issue 9, page 441 or US 4,176,334 "epoxy-glass laminate").
  • the outer layers AS exist the shielding from the chemically the same or at least material similar to that of the insulation mass VM.
  • the thermal expansion coefficient of the insulation mass VM and the outer layers AS must at least be in the same Order of magnitude so that no cracking can occur.
  • the multilayer of the shield S forms, as shown in FIG.
  • the winding wires and the Shield connections are advantageously shrunk with Jumper wires out of the potting compound.
  • the Shrink tube material is chosen so that the Adhesive strength of the material through cleaning processes such as Corona discharges and plasma etching increased several times can be. There is also the possibility To use high voltage strands, however, their liability in the potting compound be ensured.
  • the core is divided in the area of a middle of each leg (Fig. 1, dashed lines).
  • a centering sleeve ZH e.g. out PEEK plastic
  • This centering sleeve serves at the same time as a spacer between the composite body, consisting of those embedded in the insulation compound VM Transformer windings w1, w2 shielding S and coil former SK.
  • the last composite body is namely from the core parts separated by an air gap LS and only to one of the Thigh yokes - the lower one in the example shown - glued on.
  • the composite body is only one Core wall KW fixed.
  • the Core wall KW to which the gluing takes place, is selected so that when the core accelerates, e.g. during the starting phase of a satellite, is pressed against this core wall.
  • the Attachment should always be made to the yoke that ensures that the gravity of the composite body of the Counteracts acceleration of the core.
  • the air gap LS for Centering sleeve ZH can be at least one stop AG adjust, preferably at each end of the centering sleeve ZH is attached, which is removed from the adhesive surface of the Composite body is located.
  • the air gap LS offers one sufficient high vacuum insulation when operating in space.
  • the Centering sleeve ZH reduces the risk of rollover Operation up to approx. 90 ° C under normal pressure.
  • the core of the transformer with the central winding core WK and the outer legs DK and the associated yokes is separated from the ground potential on which the ground body MK lies by an insulating layer IS.
  • This insulating layer for example made of PEEK plastic, is dimensioned such that no discharges can occur via this insulating layer IS in the pressure range below 10 -2 mbar (vacuum operation).
  • the transformer according to the invention can advantageously be used as a measuring transducer which also works in high-voltage potential in terms of DC, but only has to process small potential differences in terms of AC.
  • the winding w2 represents the anode coil and the winding w1 represents the cathode coil.
  • the anode coil is at a potential which varies in particular in the intermediate pressure range between 500 V and approximately 5 kV.
  • the conductive layer ES of the shield S is also set to this “floating” potential so that arcing, in particular in the intermediate pressure range, can be derived directly.
  • the anode coil leads to the pads LA3 and LA4. Accordingly, the pad LA5 is expediently connected to the pad LA4.
  • the cathode coil is approximately 6 kV DC.
  • the helix of the traveling wave tube is connected to the mass body MK.
  • the typical voltage loads of the transformer after Invention are thus as follows:
  • the core runs up to the cathode voltage of 6 kV.
  • the core passes through the Paschen minimum, ie theoretically there are an infinite number of discharges, so that the core assumes ground potential.
  • U K cathode voltage
  • This recharging of the core takes several hours due to the high insulation resistances of the insulating layers IS and the potting material VM.
  • the nucleus remains at the voltage U K ; unless a local pressure increase occurs which causes the core to discharge.
  • the core of the transmitter can be designed as a shell or RM core.
  • the measures of the invention enable both safe operation in the intermediate pressure range and reliable long-term operation (lifespan of the satellite greater than 10 years) under space conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)

Claims (14)

  1. Transducteur dont le noyau (KE, DK) entoure essentiellement les enroulements de transduction (w1, w2), les enroulements (w1, w2) étant noyés dans une masse d'isolation (VM),
    caractérisé en ce que
    la masse d'isolation (VM) est séparée par un intervalle d'air (LS) par rapport au noyau (KE, DK) et n'est fixée qu'à une paroi du noyau (KW).
  2. Transducteur selon la revendication 1,
    caractérisé en ce que
    la masse d'isolation (VM) est fixée élastiquement à la paroi de noyau (KW), permettant à la masse d'isolation (VM) d'être pressée contre la paroi du noyau sous l'accélération du noyau (KE, DK).
  3. Transducteur selon la revendication 1 ou 2,
    caractérisé en ce que
    les enroulements de transfert (w1, w2) sont juxtaposés sur un noyau d'enroulement commun (KE) et au moins deux enroulements de transfert (w1, w2) sont séparés par un blindage (S).
  4. Transducteur selon la revendication 3,
    caractérisé en ce que
    le blindage (S) est une multicouche avec au moins une couche conductrice d'électricité (ES) interrompue par une fente de séparation de court-circuit (KT) et ayant deux couches extérieures d'isolation (AS).
  5. Transducteur selon la revendication 3 ou 4,
    caractérisé en ce que
    le blindage (S) est noyé complètement dans la masse d'isolation (VM) et le coefficient de dilatation thermique de la masse d'isolation (VM) et celui des couches extérieures (AS) du blindage (S) est du même ordre de grandeur.
  6. Transducteur selon l'une des revendications 1 à 5,
    caractérisé en ce que
    le noyau (KE, DK) du transducteur est isolé par rapport à la masse.
  7. Transducteur selon la revendication 6,
    caractérisé en ce que
    le noyau (KE, DK) est mis à un potentiel flottant.
  8. Transducteur selon la revendication 7,
    caractérisé en ce que
    le noyau (KE, DK) est mis au potentiel de l'enroulement de transfert (w2) dont le potentiel subit les plus fortes variations.
  9. Transducteur selon l'une des revendications 1 à 8,
    caractérisé en ce que
    le transducteur est réalisé sous la forme d'un noyau en coquille ou d'un noyau (RM).
  10. Transducteur selon la revendication 9,
    caractérisé par
    un manchon de centrage (ZH) pour les deux moitiés de coquille ou du noyau (RM), comportant une butée pour régler l'intervalle d'air (entrefer) (LS) entre la masse isolante (VM) et le noyau central (KE).
  11. Transducteur selon l'une des revendications 1 à 10,
    caractérisé en ce que
    les extrémités des enroulements de transfert (w1, w2) et le cas échéant le branchement du blindage (S) passent par des fils de connexion à gaine rétractée sortant de la masse d'isolation (VM).
  12. Transducteur selon l'une des revendications 6 à 11,
    caractérisé en ce que
    l'isolation (IS) du noyau (KE, DK) par rapport à la masse est dimensionnée pour que dans une plage de pression inférieure à 10-2 mbar il ne peut y avoir de décharge à travers l'isolation (IS).
  13. Application du transducteur selon l'une des revendications 1 à 12, à un convertisseur de mesure fonctionnant à un potentiel de haute tension.
  14. Application du transducteur selon l'une des revendications 1 à 13, à un convertisseur de mesure appartenant à un régulateur de courant cathodique d'un amplificateur à tubes à ondes progressives.
EP93112626A 1992-08-22 1993-08-06 Transducteur et son application Expired - Lifetime EP0585650B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4227890A DE4227890A1 (de) 1992-08-22 1992-08-22 Übertrager mit Schirmung sowie Verwendung
DE4227891A DE4227891A1 (de) 1992-08-22 1992-08-22 Übertrager sowie Verwendung
DE4227891 1992-08-22
DE4227890 1992-08-22

Publications (2)

Publication Number Publication Date
EP0585650A1 EP0585650A1 (fr) 1994-03-09
EP0585650B1 true EP0585650B1 (fr) 1998-01-14

Family

ID=25917768

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93112626A Expired - Lifetime EP0585650B1 (fr) 1992-08-22 1993-08-06 Transducteur et son application

Country Status (2)

Country Link
EP (1) EP0585650B1 (fr)
DE (1) DE59307977D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2797091A1 (fr) * 2013-04-25 2014-10-29 Nxp B.V. Transformateur et alimentation utilisant un tel transformateur
CN108538556A (zh) * 2018-03-21 2018-09-14 北京华峰测控技术股份有限公司 一种隔离变压器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3705372A (en) * 1971-12-07 1972-12-05 Westinghouse Electric Corp Cast-type winding structure for electrical inductive apparatus
JPS5666021A (en) * 1979-11-02 1981-06-04 Hitachi Ltd Molded transformer
DE8428108U1 (de) * 1984-09-24 1985-01-03 Siemens AG, 1000 Berlin und 8000 München Speicherdrossel
US4977301A (en) * 1988-10-13 1990-12-11 Matsushita Electric Industrial Co., Ltd. High-frequency heating apparatus using frequency-converter-type power supply
JPH0654738B2 (ja) * 1989-06-16 1994-07-20 日立フェライト株式会社 磁 心

Also Published As

Publication number Publication date
DE59307977D1 (de) 1998-02-19
EP0585650A1 (fr) 1994-03-09

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