EP0660343A1 - High-voltage transformer and use - Google Patents

High-voltage transformer and use Download PDF

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Publication number
EP0660343A1
EP0660343A1 EP94114266A EP94114266A EP0660343A1 EP 0660343 A1 EP0660343 A1 EP 0660343A1 EP 94114266 A EP94114266 A EP 94114266A EP 94114266 A EP94114266 A EP 94114266A EP 0660343 A1 EP0660343 A1 EP 0660343A1
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EP
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Prior art keywords
voltage transformer
secondary winding
voltage
connection end
potential
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EP94114266A
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German (de)
French (fr)
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EP0660343B1 (en
Inventor
Volker Scherb
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Robert Bosch GmbH
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Robert Bosch GmbH
ANT Nachrichtentechnik GmbH
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Publication of EP0660343A1 publication Critical patent/EP0660343A1/en
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    • 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.
  • a high-voltage transformer is known from EP 0 105 942 B1.
  • 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 are used as well Voltage multiplier stages used.
  • the switching regulators are operated with relatively high switching frequencies - 10 kHz to 100 kHz - so that the weight of the inductors, capacitors and core material can be kept low. 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).
  • the uppermost winding layer of the secondary winding itself acts as a shield and prevents glow discharges.
  • the top layer is on a "quiet", ie high DC potential.
  • the layer voltage AC voltage of the top layer
  • the voltage limit for which the glow discharge is used 250 V at 20 kHz. Since glow discharges only occur with alternating voltages, the electrical load on the insulation is minimal in the critical pressure range. Only so-called electrodeless discharges occur there, but they are not as energy-rich as, for example, glow discharges.
  • the thickness of the casting or insulating compound need not be chosen to be greater than in the case of a high-voltage transformer, without the measures according to the invention.
  • FIG. 1 shows the basic structure of an embodiment of the high-voltage 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 w 1. 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.
  • a plurality of secondary windings are provided, each of which is accommodated in winding chambers K of a winding support WT.
  • 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.
  • the thickness of the insulating compound IM depends on the specified service life of the high-voltage transformer. It can be taken from a life curve for the material of the insulating compound.
  • connection ends 1, 2 of the secondary winding w2 are led out of the insulating compound IM and on rectifier elements - Diodes D1, D2 and smoothing capacitors C1, C2 -, which are arranged on a circuit board LP, connected.
  • the rectifier elements are connected together as a voltage doubler stage (FIG. 2).
  • the rectifier circuit can also consist of only one diode and one smoothing capacitor.
  • that connection end of the secondary winding w2 - in the exemplary embodiment according to FIG. 2 the connection end 1 - which has a low DC voltage load is shielded.
  • the DC voltage which is subjected to higher DC stresses - in the exemplary embodiment according to FIG.
  • connection end 2 - is unshielded and consists of a simple high-voltage wire, ie of a conductor with thin insulation, which should be vacuum-tight due to its use in space.
  • a shrinked jumper wire can be used.
  • the shielding SI of the connection end 1 can be realized by using a coaxial line.
  • the shield SI or the outer shield conductor is connected to the connection end 2 which is subjected to a higher DC voltage. This measure ensures that the uppermost winding layer of the secondary winding w2 facing outwards is at "quiet", ie at a high DC potential of, for example, 2 KV.
  • the uppermost winding layer acts as a shield and prevents external glow discharges, especially in the critical pressure range (Paschen minimum).
  • the insulating compound IM of the secondary winding w2 is subjected to a relatively low electrical load. This means that a longer dwell time in the critical pressure range can be permitted or the service life can be increased with the same dwell time. The susceptibility to faults is also reduced. The prerequisite for this is that the AC voltage drop at the uppermost winding layer does not meet the threshold value for the occurrence of glow discharges exceeds. For an AC voltage with a frequency of 20 kHz, this threshold is 250 V.
  • the shield SI or the shield conductor of the coaxial line 1, 1 ' is led at least to the printed circuit board LP or a potting compound VM surrounding it.
  • the line end 1 ' is at ground potential, e.g. connected to the housing or base SO of the high-voltage transformer.
  • connection end 1 ie 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 has a potential difference of, for example, up to each winding position Can have 250 V.
  • 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 primary winding w1 is supplied with a voltage of 45 V, for example, 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, for example, 4 kV depending on the transmission ratio.
  • 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 voltage can be increased to increase the total voltage or lead to further high voltage consumers, for example to different electrodes of a traveling wave tube.
  • the connection ends of the various secondary windings w2 must be interconnected, for example in accordance with the circuit diagram in FIG. 3. That or the DC voltage higher load / n connection ends of the secondary winding w2 unshielded.
  • the shielding of a DC end with a low load is connected to the inner coaxial cable of the same or a next secondary winding w2.
  • the coaxial lines only need to be thinly insulated since the field strength load is low according to the measures of the invention.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

High-voltage transformers, in particular for space applications, must comply with special requirements. Their windings (W1, W2) are potted in an insulating compound (IM) for protection against flashovers. In order to avoid in particular glow discharges in critical pressure ranges, that end (1) of the secondary winding (W2) which has little load in terms of the DC potential is designed (SI) to be screened, and this screen (SI) is connected to the potential of that connection end (2) which is loaded more highly in terms of the DC potential. The last winding layer of the secondary winding (W2) then itself acts as a screen. The electrical load on the insulation is minimal, in particular in the critical pressure range (Paschen minimum). <IMAGE>

Description

Die Erfindung betrifft einen Hochspannungstransformator mit mindestens einer in einer Isoliermasse eingebetteten Sekundärwicklung. Ein solcher Hochspannungstransformator ist bekannt aus EP 0 105 942 B1.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.

Um Überschläge an Hochspannungstransformatoren zu vermeiden, werden deren Wicklungen in Isoliermassen eingegossen. Die Lebensdauer dieser Isoliermassen und damit die Funktionsfähigkeit der Hochspannungstransformatoren ist stark abhängig von der elektrischen Beanspruchung, z.B. durch Überschläge und unkontrollierte Entladungen.In order to avoid flashovers on high-voltage transformers, 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.

Aufgabe vorliegender Erfindung ist es daher, Maßnahmen zu treffen, die die elektrische Beanspruchung dieser Isoliermassen, insbesondere in kritischen Druckbereichen, vermindern. Diese Aufgabe wird durch die Maßnahmen gemäß Anspruch 1 gelöst. Die weiteren Ansprüche zeigen Weiterbildungen bzw. vorteilhafte Verwendungen auf.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.

Die Erfindung beruht auf folgenden Erkenntnissen: Hochspannungstransformatoren für Raumfahrtanwendungen, z.B. zur Versorgung von Wanderfeldröhren, müssen besonderen Anforderungen genügen. Um aus kleinen Spannungen, z.B. aus Solarzellen, hohe Gleichspannungen zu erzeugen, werden Schaltregler mit nachgeschalteten Hochspannungstransformatoren und Gleichrichterelementen sowie gegebenenfalls Spannungsvervielfacherstufen verwendet. Die Schaltregler werden mit relativ hohen Schaltfrequenzen - 10 kHz bis 100 kHz - betrieben, damit Induktivitäten, Kapazitäten sowie das Kernmaterial bezüglich ihres Gewichtes klein gehalten werden können. Bedingt durch die relativ hohen Schaltfrequenzen treten insbesondere im Zwischendruckbereich zwischen Atmosphärendruck und Weltraumbedingungen (Vakuum) bereits bei niedrigen Wechselspannungen (250 V bei 20 kHz Schaltfrequenz) im Paschenminimum Dauerglimmentladungen auf. Wenn in einem solchen Druckbereich von 100 h Pa bis 10-2 h Pa ein Betrieb über mehrere Stunden zugelassen sein soll, kann die Isolierung geschädigt und damit die Lebensdauer eines solchen Hochspannungstransformators verringert werden. Durch die Maßnahmen der Erfindung werden solche Glimmentladungen im kritischen Druckbereich vermieden.The invention is based on the following findings: High-voltage transformers for space applications, for example for supplying traveling wave tubes, must meet special requirements. In order to generate high DC voltages from small voltages, for example from solar cells, switching regulators with downstream high-voltage transformers and rectifier elements are used as well Voltage multiplier stages used. The switching regulators are operated with relatively high switching frequencies - 10 kHz to 100 kHz - so that the weight of the inductors, capacitors and core material can be kept low. 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). If operation over several hours is to be permitted in such a pressure range from 100 h Pa to 10-2 h Pa, the insulation can be damaged and the service life of such a high-voltage transformer can be reduced. The measures of the invention prevent such glow discharges in the critical pressure range.

Durch die Verbindung der Schirmung des gleichspannungspotentialmäßig niedrig belasteten Anschlußendes der Sekundärwicklung mit dem gleichspannungspotentialmäßig höher belasteten Anschlußende wirkt die oberste Wickellage der Sekundärwicklung selbst als Schirmung und verhindert Glimmentladungen. Die oberste Lage liegt auf "ruhigem", d.h. hohem Gleichspannungspotential. Voraussetzung dazu ist, daß die Lagenspannung (Wechselspannung der obersten Lage) kleiner ist als der Spannungsgrenzwert, für den die Glimmentladung einsetzt (250 V bei 20 kHz). Da Glimmentladungen nur bei Wechselspannungen auftreten, wird die elektrische Belastung der Isolierung im kritischen Druckbereich minimal. Es treten dort nur sogenannte elektrodenlose Entladungen auf, die aber nicht so energiereich sind wie z.B. Glimmentladungen. Die Dicke der Verguß- bzw. Isoliermasse muß aus vorgenannten Gründen nicht größer gewählt werden als bei einem Hochspannungstransformator, ohne die Maßnahmen gemäß der Erfindung.By connecting the shielding of the connection end of the secondary winding with a low DC voltage potential to the connection end with a higher loading connection with DC potential, the uppermost winding layer of the secondary winding itself acts as a shield and prevents glow discharges. The top layer is on a "quiet", ie high DC potential. The prerequisite for this is that the layer voltage (AC voltage of the top layer) is less than the voltage limit for which the glow discharge is used (250 V at 20 kHz). Since glow discharges only occur with alternating voltages, the electrical load on the insulation is minimal in the critical pressure range. Only so-called electrodeless discharges occur there, but they are not as energy-rich as, for example, glow discharges. For the aforementioned reasons, the thickness of the casting or insulating compound need not be chosen to be greater than in the case of a high-voltage transformer, without the measures according to the invention.

Anhand der Zeichnungen werden nun Ausführungsbeispiele der Erfindung näher erläutert. Es zeigen

  • Fig. 1 eine Schnittdarstellung eines Hochspannungstransformators nach der Erfindung,
  • Fig. 2 die Beschaltung des Hochspannungstransformators mit Gleichrichterelementen und
  • Fig. 3 die Zusammenschaltung von mehreren Sekundärwicklungen.
Exemplary embodiments of the invention will now be explained in more detail with reference to the drawings. Show it
  • 1 is a sectional view of a high voltage transformer according to the invention,
  • Fig. 2 shows the wiring of the high-voltage transformer with rectifier elements and
  • Fig. 3 shows the interconnection of several secondary windings.

Den prinzipiellen Aufbau eines Ausführungsbeispiels des Hochspannungstransformators nach der Erfindung zeigt Fig. 1 in einer Schnittdarstellung. Der zylindrische Transformatorkern KE ist von einer Primärwicklung w1 umgeben, die in Isoliermaterial eingebettet ist. Um diese Primärwicklung w 1 ist ein metallischer Schirm S1 gelegt. Er ist mit einem Transformatorgehäuse bzw. -sockel SO leitend verbunden. Über diesem metallischen Schirm befindet sich die Hauptisolationsschicht HW, beispielsweise in Epoxydharz eingegossenes Makrolon. Die Hauptisolationsschicht ist von der oder den Sekundärwicklungen w2 umgeben. In Fig. 1 sind mehrere Sekundärwicklungen vorgesehen, die jeweils in Wicklungskammern K eines Wicklungsträgers WT untergebracht sind. Die einzelnen konzentrisch zum Kern KE angeordneten Lagenwicklungen LW der Sekundärwicklungen w2 sind mitsamt dem Wicklungsträger in die Isoliermasse IM eingebettet, bzw. mit dieser vergossen.1 shows the basic structure of an embodiment of the high-voltage 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 w 1. 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. In Fig. 1, a plurality of secondary windings are provided, each of which is accommodated in winding chambers K of a winding support WT. 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.

Die Stärke der Isoliermasse IM richtet sich nach der vorgegebenen Lebensdauer des Hochspannungstransformators. Sie kann aus einer Lebensdauerkurve für das Material der Isoliermasse entnommen werden.The thickness of the insulating compound IM depends on the specified service life of the high-voltage transformer. It can be taken from a life curve for the material of the insulating compound.

Die Anschlußenden 1, 2 der Sekundärwicklung w2 sind aus der Isoliermasse IM herausgeführt und an Gleichrichterelemente - Dioden D1, D2 und Glättungskondensatoren C1, C2 -, die auf einer Leiterplatte LP angeordnet sind, angeschlossen. Als ein mögliches Ausführungsbeispiel sind die Gleichrichterelemente als Spannungsverdopplerstufe (Fig. 2) zusammengeschaltet. Natürlich kann die Gleichrichterschaltung auch nur aus einer Diode und einem Glättungskondensator bestehen. Gemäß der Erfindung ist jenes Anschlußende der Sekundärwicklung w2 - im Ausführungsbeispiel nach Fig. 2 das Anschlußende 1 -, das gleichspannungsmäßig niedrig belastet ist, geschirmt ausgebildet. Das gleichspannungsmäßig höher belastete Anschlußende - im Ausführungsbeispiel nach Fig. 2 das Anschlußende 2 - ist ungeschirmt ausgebildet und besteht aus einfacher Hochspannungslitze, d.h. aus einem Leiter mit dünner Isolierung, die aufgrund der Anwendung im Weltraum vakuumdicht sein sollte. Es kann alternativ ein überschrumpfter Schaltdraht verwendet werden. Die Schirmung SI des Anschlußendes 1 kann durch Verwendung einer Koaxialleitung realisiert werden. Die Schirmung SI bzw. der äußere Schirmleiter ist erfindungsgemäß mit dem gleichspannungsmäßig höher belasteten Anschlußende 2 verbunden. Durch diese Maßnahme wird erreicht, daß die nach außen weisende oberste Wickellage der Sekundärwicklung w2 auf "ruhigem", d.h. auf hohem Gleichspannungspotential von z.B. 2 KV liegt. Die oberste Wickellage wirkt so als Schirmung und verhindert äußere Glimmentladungen, insbesondere im kritischen Druckbereich (Paschenminimum). Die Isoliermasse IM der Sekundärwicklung w2 wird elektrisch relativ gering belastet. Dadurch kann eine längere Verweilzeit im kritischen Druckbereich zugelassen werden oder bei gleicher Verweilzeit die Lebensdauer gesteigert werden. Auch wird die Störanfälligkeit reduziert. Voraussetzung hierfür ist, daß der Wechselspannungsabfall an der obersten Wickellage den Schwellwert für das Auftreten von Glimmentladungen nicht übersteigt. Bei einer Wechselspannung mit einer Frequenz von 20 kHz liegt dieser Schwellwert bei 250 V.The connection ends 1, 2 of the secondary winding w2 are led out of the insulating compound IM and on rectifier elements - Diodes D1, D2 and smoothing capacitors C1, C2 -, which are arranged on a circuit board LP, connected. As a possible embodiment, the rectifier elements are connected together as a voltage doubler stage (FIG. 2). Of course, the rectifier circuit can also consist of only one diode and one smoothing capacitor. According to the invention, that connection end of the secondary winding w2 - in the exemplary embodiment according to FIG. 2, the connection end 1 - which has a low DC voltage load is shielded. The DC voltage, which is subjected to higher DC stresses - in the exemplary embodiment according to FIG. 2, the connection end 2 - is unshielded and consists of a simple high-voltage wire, ie of a conductor with thin insulation, which should be vacuum-tight due to its use in space. Alternatively, a shrinked jumper wire can be used. The shielding SI of the connection end 1 can be realized by using a coaxial line. According to the invention, the shield SI or the outer shield conductor is connected to the connection end 2 which is subjected to a higher DC voltage. This measure ensures that the uppermost winding layer of the secondary winding w2 facing outwards is at "quiet", ie at a high DC potential of, for example, 2 KV. The uppermost winding layer acts as a shield and prevents external glow discharges, especially in the critical pressure range (Paschen minimum). The insulating compound IM of the secondary winding w2 is subjected to a relatively low electrical load. This means that a longer dwell time in the critical pressure range can be permitted or the service life can be increased with the same dwell time. The susceptibility to faults is also reduced. The prerequisite for this is that the AC voltage drop at the uppermost winding layer does not meet the threshold value for the occurrence of glow discharges exceeds. For an AC voltage with a frequency of 20 kHz, this threshold is 250 V.

Die Schirmung SI bzw. der Schirmleiter der Koaxialleitung 1, 1' ist zumindest bis zur Leiterplatte LP oder einer sie umgebenden Vergußmasse VM geführt. Das Leitungsende 1' ist mit Massepotential, z.B. dem Gehäuse oder Sockel SO des Hochspannungstransformators verbunden.The shield SI or the shield conductor of the coaxial line 1, 1 'is led at least to the printed circuit board LP or a potting compound VM surrounding it. The line end 1 'is at ground potential, e.g. connected to the housing or base SO of the high-voltage transformer.

Die Herausführung des Anschlußendes 1, d.h. das Anschlußende der untersten Lagenwicklung LW1, aus der Wicklungskammer K erfolgt in einem von der übrigen Wicklungskammer K getrennten Kammerbereich KB, um ebenfalls Überschläge oder Entladungen zu vermeiden, da dieses Anschlußende gegenüber jeder Wickellage einen Potentialunterschied von beispielsweise bis zu 250 V aufweisen kann. Die Abtrennung des Kammerbereichs KB kann, wie in Fig. 1 dargestellt, durch einen zusätzlichen Steg auf dem Kammerträger WT realisiert werden, der am Kammergrund eine Bohrung für das Anschlußende 1 aufweist. Die Primärwicklung w1 wird z.B. über einen Schaltregler von Rechteckpulsen im Bereich von 10 bis 100 kHz mit einer Spannung von 45 V gespeist. Die gleichgerichtete Spannung an der Reihenschaltung der Kondensatoren C1, C2 beträgt je nach Übersetzungsverhältnis z.B. 4 kV. Der Endpunkt der Leitung 1, 1' wird auf Massepotential gelegt. An den Anschlußpunkt 3 kann eine weitere Sekundärwicklung mit Gleichrichterelementen angeschlossen sein. Die Ausgangsgleichspannung kann zur Erhöhung der Gesamtspannung aufgestockt werden oder zu weiteren Hochspannungsabnehmern, z.B. zu verschiedenen Elektroden einer Wanderfeldröhre führen. In letzteren Fällen sind die Anschlußenden der verschiedenen Sekundärwicklungen w2 beispielsweise gemäß dem Schaltschema nach Fig. 3 zusammenzuschalten. Das bzw. die gleichspannungsmäßig höher belastete/n Anschlußende/n der Sekundärwicklung w2 sind ungeschirmt ausgeführt. Die Schirmung eines gleichspannungsmäßig niedrig belasteten Anschlußendes ist mit dem Koaxialkabelinnenleiter derselben oder einer nächsten Sekundärwicklung w2 verbunden. Die Koaxialleitungen müssen nur dünn isoliert werden, da die Feldstärkebelastung gemäß den Maßnahmen der Erfindung gering ist.The connection end 1, ie the connection end of the lowest layer winding LW1, is led out of the winding chamber K in 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 has a potential difference of, for example, up to each winding position Can have 250 V. 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 primary winding w1 is supplied with a voltage of 45 V, for example, 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, for example, 4 kV depending on the transmission ratio. 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 voltage can be increased to increase the total voltage or lead to further high voltage consumers, for example to different electrodes of a traveling wave tube. In the latter cases, the connection ends of the various secondary windings w2 must be interconnected, for example in accordance with the circuit diagram in FIG. 3. That or the DC voltage higher load / n connection ends of the secondary winding w2 unshielded. The shielding of a DC end with a low load is connected to the inner coaxial cable of the same or a next secondary winding w2. The coaxial lines only need to be thinly insulated since the field strength load is low according to the measures of the invention.

Claims (8)

Hochspannungstransformator mit mindestens einer in einer Isoliermasse (IM) eingebetteten Sekundärwicklung (w2), die mit mindestens einem Gleichrichterelement (D1, D2, C1, C2) beschaltet ist, mit folgenden Merkmalen: - das gleichspannungspotentialmäßig niedrig belastete Anschlußende (1) der Sekundärwicklung (w2) ist geschirmt (SI) ausgebildet, - die Schirmung (SI) des niedrig belasteten Anschlußendes (1) der Sekundärwicklung (w2) ist mit einem anderen Anschlußende (2) der Sekundärwicklung (w2) verbunden, welches gleichspannungspotentialmäßig höher belastet ist. High-voltage transformer with at least one secondary winding (w2) embedded in an insulating compound (IM), which is connected to at least one rectifier element (D1, D2, C1, C2), with the following features: the connection end (1) of the secondary winding (w2), which has a low DC potential, is shielded (SI), - The shielding (SI) of the low-stress connection end (1) of the secondary winding (w2) is connected to another connection end (2) of the secondary winding (w2), which has a higher DC voltage potential. Hochspannungstransformator nach Anspruch 1, dadurch gekennzeichnet, daß die Gleichrichterelemente (D1, D2, C1, C2) auf einer Leiterplatte (LP) angeordnet sind und daß die Schirmung (SI) zumindest bis zur Leiterplatte (LP) oder einer sie umgebenden Vergußmasse (VM) geführt ist.High-voltage transformer according to Claim 1, characterized in that the rectifier elements (D1, D2, C1, C2) are arranged on a printed circuit board (LP) and that the shielding (SI) at least up to the printed circuit board (LP) or a potting compound (VM) surrounding it is led. Hochspannungstransformator nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß das niedrig belastete Anschlußende (1) der Sekundärwicklung (w2) als Koaxialleitung ausgebildet ist.High-voltage transformer according to one of Claims 1 or 2, characterized in that the low-stress connection end (1) of the secondary winding (w2) is designed as a coaxial line. Hochspannungstransformator nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das höher belastete Anschlußende (2) der Sekundärwicklung (w2) als Hochspannungslitze ausgebildet ist.High-voltage transformer according to one of Claims 1 to 3, characterized in that the terminal end (2) of the secondary winding (w2) which is subjected to higher loads is designed as a high-voltage stranded wire. Verwendung des Hochspannungstransformators nach einem der Ansprüche 1 bis 4 im Paschenminimum, insbesondere während der Startphase eines Satelliten.Use of the high-voltage transformer according to one of claims 1 to 4 in the Paschen minimum, in particular during the launch phase of a satellite. Verwendung des Hochspannungstransformators nach einem der Ansprüche 1 bis 4 unter Weltraumbedingungen.Use of the high voltage transformer according to one of claims 1 to 4 under space conditions. Verwendung des Hochspannungstransformators nach einem der Ansprüche 1 bis 4 für eine insbesondere rechteckförmige Wechselspannung zwischen 10 und 100 kHz.Use of the high-voltage transformer according to one of claims 1 to 4 for a particularly rectangular AC voltage between 10 and 100 kHz. Verwendung des Hochspannungstransformators zur Versorgung einer Satelliten-Wanderfeldröhre.Use of the high voltage transformer to supply a satellite traveling wave tube.
EP94114266A 1993-12-23 1994-09-10 High-voltage transformer and use Expired - Lifetime EP0660343B1 (en)

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DE4344185A DE4344185A1 (en) 1993-12-23 1993-12-23 High voltage transformer and use
DE4344185 1993-12-23

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EP0660343A1 true EP0660343A1 (en) 1995-06-28
EP0660343B1 EP0660343B1 (en) 1997-07-23

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DE102012016225A1 (en) 2012-08-14 2014-03-13 Jürgen Blum Electric field energy providing device for e.g. switchgears, has coaxial trunk lines in state of high electrostatic potential, and set of electrons that is provided in conductive layers, where electrons are accelerated by voltage potential

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH482276A (en) * 1968-05-15 1969-11-30 Bbc Brown Boveri & Cie Transmitter of unipolar control pulses for thyristors
DE1949154A1 (en) * 1969-09-29 1971-04-01 Siemens Ag Circuit arrangement for interference suppression of the direct current supply for circuit units without potential binding

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Publication number Priority date Publication date Assignee Title
CH373598A (en) * 1959-06-26 1963-11-30 Magneti Marelli Spa Shielding device for an ignition coil, particularly for motorcycles and motor vehicles
EP0105942B1 (en) * 1982-10-08 1987-01-07 ANT Nachrichtentechnik GmbH Device for producing high dc voltages

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH482276A (en) * 1968-05-15 1969-11-30 Bbc Brown Boveri & Cie Transmitter of unipolar control pulses for thyristors
DE1949154A1 (en) * 1969-09-29 1971-04-01 Siemens Ag Circuit arrangement for interference suppression of the direct current supply for circuit units without potential binding

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DE59403456D1 (en) 1997-08-28
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