EP0660344A1 - Transformateur à haute tension et utilisation - Google Patents

Transformateur à haute tension et utilisation Download PDF

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Publication number
EP0660344A1
EP0660344A1 EP94114268A EP94114268A EP0660344A1 EP 0660344 A1 EP0660344 A1 EP 0660344A1 EP 94114268 A EP94114268 A EP 94114268A EP 94114268 A EP94114268 A EP 94114268A EP 0660344 A1 EP0660344 A1 EP 0660344A1
Authority
EP
European Patent Office
Prior art keywords
voltage transformer
winding
secondary winding
insulating compound
transformer according
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.)
Ceased
Application number
EP94114268A
Other languages
German (de)
English (en)
Inventor
Volker 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
ANT Nachrichtentechnik 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 Robert Bosch GmbH, ANT Nachrichtentechnik GmbH filed Critical Robert Bosch GmbH
Publication of EP0660344A1 publication Critical patent/EP0660344A1/fr
Ceased 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
    • H01F27/36—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 high-voltage transformer with at least one secondary winding embedded in an insulating compound.
  • Such a high-voltage transformer is known from EP 0 105 942 B1.
  • their windings are cast in insulating materials.
  • the service life of these insulating materials and thus the functionality of the high-voltage transformers is heavily dependent on the electrical load, e.g. through flashovers and uncontrolled discharges.
  • the object of the present invention is therefore to take measures which reduce the electrical stress on these insulating materials, in particular in critical pressure ranges. This object is achieved by the measures according to claim 1.
  • the further claims show further developments or advantageous uses.
  • High-voltage transformers for space applications must meet special requirements.
  • switching regulators with downstream high-voltage transformers and rectifier elements and, if appropriate, voltage multiplier stages are used.
  • the switching regulators are operated with relatively high switching frequencies - 10 kHz to 100 kHz - so that inductors, capacitors and that Core material can be kept small in terms of their weight. Due to the relatively high switching frequencies, permanent glow discharges occur in the Paschen minimum, especially in the intermediate pressure range between atmospheric pressure and space conditions (vacuum) at low AC voltages (250 V at 20 kHz switching frequency).
  • FIG. 1 shows the basic structure of an embodiment of the high-frequency transformer according to the invention in a sectional view.
  • the cylindrical transformer core KE is surrounded by a primary winding w1, which is embedded in insulating material.
  • a metallic screen S1 is placed around this primary winding w1. It is conductively connected to a transformer housing or base SO.
  • the main insulation layer HW for example Makrolon cast in epoxy resin, is located above this metallic screen.
  • the main insulation layer is surrounded by the secondary winding or w2.
  • several secondary windings are provided, each in winding chambers K of a winding support WT are housed.
  • the individual layer windings LW of the secondary windings w2, which are arranged concentrically to the core KE, are embedded together with the winding carrier in the insulating compound IM, or are potted therewith.
  • this insulating compound IM depends on the specified service life of the high-voltage transformer. It can be taken from a service life curve for the material of the insulating compound IM.
  • the transformer encapsulation is loaded with maximum field strength on the outside and must therefore be sufficiently thick.
  • the outer circumference of the secondary winding (s) or the insulating compound IM still above it carries a conductive coating LS, e.g. a conductive lacquer that is grounded, e.g. by connection to the housing or base SO. It should be noted that the coating LS is not a short-circuit winding for the high-frequency transformer. So you must have at least one separation slot.
  • the connection ends 1, 2 of the secondary winding which are led out of the insulating compound IM are shielded.
  • the shield SI is also connected to ground potential and is preferably also contacted directly with the coating.
  • the shielding SI can be realized in that the connection ends 1, 2 are designed as coaxial lines from the exit from the chambers or the insulating compound IM.
  • the outer shield of the coaxial lines 1, 1 'and 2, 2' (FIG. 2), which is connected to ground potential, is thinly insulated and vacuum-tight for mechanical protection.
  • the high-voltage transformer is connected to rectifier elements which are arranged on a printed circuit board LP. These components are preferably together with the printed circuit board LP poured into an insulating potting compound VM.
  • the shield SI or the shield conductor of the coaxial lines 1, 1 'and 2, 2' are at least up to the circuit board LP or the encapsulating compound VM surrounding them.
  • connection end 1 i.e. the connection end of the lowest layer winding LW1
  • a chamber area KB which is separate from the rest of the winding chamber K, in order also to avoid flashovers or discharges, since this connection end can have a potential difference of, for example, up to 250 V with respect to each winding position.
  • the separation of the chamber area KB can, as shown in Fig. 1, be realized by an additional web on the chamber support WT, which has a hole for the connection end 1 at the chamber bottom.
  • the secondary winding w2 shows the wiring of one of the secondary windings w2 with a voltage doubler circuit, consisting of the diodes D1, D2 and the capacitors C1, C2.
  • the primary winding w1 is e.g. supplied with a voltage of 45 V via a switching regulator of rectangular pulses in the range from 10 to 100 kHz.
  • the rectified voltage at the series connection of the capacitors C1, C2 is e.g. 4 kV.
  • the end point of line 1, 1 ' is set to ground potential.
  • a further secondary winding with rectifier elements can be connected to the connection point 3.
  • the DC output voltages can be increased to increase the total voltage or to other high voltage consumers, e.g. lead to different electrodes of a traveling wave tube.
EP94114268A 1993-12-23 1994-09-10 Transformateur à haute tension et utilisation Ceased EP0660344A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4344183 1993-12-23
DE4344183A DE4344183A1 (de) 1993-12-23 1993-12-23 Hochspannungstransformator sowie Verwendung

Publications (1)

Publication Number Publication Date
EP0660344A1 true EP0660344A1 (fr) 1995-06-28

Family

ID=6506017

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94114268A Ceased EP0660344A1 (fr) 1993-12-23 1994-09-10 Transformateur à haute tension et utilisation

Country Status (2)

Country Link
EP (1) EP0660344A1 (fr)
DE (1) DE4344183A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE394552C (de) * 1924-04-29 Siemens & Halske Akt Ges Isolation fuer Hochspannung fuehrende ringfoermige Wicklungen von Transformatoren, insbesondere Messtransformatoren
CH186403A (de) * 1936-03-23 1936-09-15 Emil Dr Huber Drosseleinrichtung zur Abhaltung von leitungsgerichteten hochfrequenten Störspannungen vom Empfänger.
CH294740A (de) * 1950-08-25 1953-11-30 Siemens Ag Elektrischer Apparat, dessen zu isolierende Teile in einen Isoliermaterialkörper eingebettet sind.
FR2148514A1 (fr) * 1971-08-12 1973-03-23 Solartron Electronic Group
US4333900A (en) * 1977-12-02 1982-06-08 Chloride Electro Networks, Division Of Chloride, Inc., N. American Operation Process for manufacture of high voltage transformers and the like
DE9217807U1 (fr) * 1992-12-24 1993-04-08 Kommanditgesellschaft Ritz Messwandler Gmbh & Co, 2000 Hamburg, De
DE4204092A1 (de) * 1992-02-12 1993-08-19 Ant Nachrichtentech Aus mindestens einer wicklungskammer bestehender spulenkoerper fuer wickelgut insbesondere fuer einen hochspannungstransformator
DE9313299U1 (de) * 1993-09-03 1993-11-04 Beru Werk Ruprecht Gmbh Co A Zündspule

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE394552C (de) * 1924-04-29 Siemens & Halske Akt Ges Isolation fuer Hochspannung fuehrende ringfoermige Wicklungen von Transformatoren, insbesondere Messtransformatoren
CH186403A (de) * 1936-03-23 1936-09-15 Emil Dr Huber Drosseleinrichtung zur Abhaltung von leitungsgerichteten hochfrequenten Störspannungen vom Empfänger.
CH294740A (de) * 1950-08-25 1953-11-30 Siemens Ag Elektrischer Apparat, dessen zu isolierende Teile in einen Isoliermaterialkörper eingebettet sind.
FR2148514A1 (fr) * 1971-08-12 1973-03-23 Solartron Electronic Group
US4333900A (en) * 1977-12-02 1982-06-08 Chloride Electro Networks, Division Of Chloride, Inc., N. American Operation Process for manufacture of high voltage transformers and the like
DE4204092A1 (de) * 1992-02-12 1993-08-19 Ant Nachrichtentech Aus mindestens einer wicklungskammer bestehender spulenkoerper fuer wickelgut insbesondere fuer einen hochspannungstransformator
DE9217807U1 (fr) * 1992-12-24 1993-04-08 Kommanditgesellschaft Ritz Messwandler Gmbh & Co, 2000 Hamburg, De
DE9313299U1 (de) * 1993-09-03 1993-11-04 Beru Werk Ruprecht Gmbh Co A Zündspule

Also Published As

Publication number Publication date
DE4344183A1 (de) 1995-06-29

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

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