EP0445704A2 - Reactor coil, particularly for operating high-pressure metal vapour lamps - Google Patents

Reactor coil, particularly for operating high-pressure metal vapour lamps Download PDF

Info

Publication number
EP0445704A2
EP0445704A2 EP91103237A EP91103237A EP0445704A2 EP 0445704 A2 EP0445704 A2 EP 0445704A2 EP 91103237 A EP91103237 A EP 91103237A EP 91103237 A EP91103237 A EP 91103237A EP 0445704 A2 EP0445704 A2 EP 0445704A2
Authority
EP
European Patent Office
Prior art keywords
core
ferrite
air gap
cross
sectional area
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.)
Granted
Application number
EP91103237A
Other languages
German (de)
French (fr)
Other versions
EP0445704A3 (en
EP0445704B1 (en
Inventor
Paul Dr. Dipl.-Ing. Grohs
Uwe Ing. Grad. Hartmann
Roman Dipl.-Ing. Schichl (Fh)
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.)
Vogt Electronic AG
Original Assignee
Vogt Electronic 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 Vogt Electronic AG filed Critical Vogt Electronic AG
Publication of EP0445704A2 publication Critical patent/EP0445704A2/en
Publication of EP0445704A3 publication Critical patent/EP0445704A3/en
Application granted granted Critical
Publication of EP0445704B1 publication Critical patent/EP0445704B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00—Fixed inductances not covered by group H01F17/00

Definitions

  • the invention relates to an oscillating throttle according to the introductory part of patent claim 1.
  • High-pressure metal vapor lamps require a high voltage to ignite the arc, which can be approximately 200 times or more the operating voltage.
  • This ignition voltage is generated in a known manner at high frequency by a series resonant circuit from an oscillating choke according to the introductory part of patent claim 1 and an oscillating circuit capacitor, the latter being connected in parallel with the MHD lamp. In the event of resonance, the required ignition voltage is applied to this capacitor.
  • the resonance condition requires that the choke be of high quality in order to safely reach the ignition voltage.
  • this choke since this choke also limits the combustion current in normal operation, it must have a high inductance at the lamp-related, low frequency.
  • the cross-sectional area surrounded by the winding base of the coil former is constant over the length of the air gap and as large as in the area of the field line transition from the air into the ferrite Kerns (see Fig. 1).
  • the subclaims relate to preferred embodiments of the oscillating throttle according to claim 1.
  • FIG. 1 shows the structure of a conventional known oscillating choke.
  • a very large air gap 1 is provided within the winding, which is located on a coil former 2, the surface A of which is surrounded by the winding base 2a has a constant cross section over the length of the air gap 1.
  • the size of the cross section B of the surface 1a at the transition of the magnetic field lines from the air into the ferrite of the core 3 is chosen so that the permissible maximum saturation induction of the ferrite used is not exceeded.
  • the core 3 ' consists of two E-core halves 3a' each with a middle leg 3c 'shorter than the outer legs 3b'.
  • the middle legs 3c 'of the core halves 3a' protrude into a coil former 2 'and leave an air gap 1' between them.
  • the cross-sectional area A enclosed by the winding base 2a 'of the coil former 2' is reduced in the area of the air gap 1 'compared to the cross-sectional area B in the area of the field line exit from the air into the ferrite of the core 3', the latter cross-sectional area B being so large that the associated induction just does not bring the ferrite into saturation.
  • Fig. 3 shows an embodiment of the oscillating throttle according to the invention, in which the shear is increased so that a central leg can be completely dispensed with in the core 3 ′′.
  • the ferrite core 3 ′′ now only consists of a frame that increases the permeability and bundles the outer field lines, as a result of which a magnetic shielding function is achieved.
  • a frame construction as in FIG. 3 can also be used in accordance with FIG. 4 for the realization of an oscillating choke of the type in FIG. 2.
  • the short middle leg sections 3c 'of the core 3' present in the oscillating choke according to FIG. 2 to increase the permeability are inserted here in addition to the ferrite frame 3 '''as individual pieces 3e''' made of ferrite into the coil former 2 '''.
  • the advantage of the frame construction is that the volume of the coil is reduced by higher core outer legs (Fig. 5) with the same cross-section, and that a good magnetic Shielding is achieved.
  • the shielding effect can be further improved in that the ferrite frame core 3 ′′, 3 ′′ ′′ consists of one piece and thus has no air gap as such.
  • the coil body 2 ', 2' ', 2' '' is expediently constructed in chamber technology, as shown in the drawing.
  • the cross-sectional area enclosed by the coil former base decreases continuously from the ends of the air gap towards the center thereof. It is particularly advantageous if the cross-sectional decrease is adapted to the course of the field lines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

A reactor coil is proposed, whose ferrite core 3' has an air gap 1' in the region of the coil former 2' and which is particularly suitable for operating high-pressure metal vapour lamps which operate with a low-frequency burning current and whose starting voltage is generated at high frequency. In the reactor coil according to the invention, the cross-sectional area A surrounded by the winding base 2a' of the coil former 2' is reduced in the region of the air gap 1' with respect to the cross-sectional area B in the region of the transition of the field lines from the air into the ferrite of the core 3'. In comparison with known reactor coils of the type mentioned initially, in which the winding base of the coil former has a constant unobstructed width over the length of the air gap, in this way a better quality is achieved with the same dimensions, or smaller dimensions are obtained with the same quality. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Schwingdrossel gemäß dem einleitenden Teil des Patentanspruchs 1.The invention relates to an oscillating throttle according to the introductory part of patent claim 1.

Metalldampfhochdrucklampen benötigen zum Zünden des Lichtbogens eine hohe Spannung, die etwa das 200-fache oder mehr der Brennspannung betragen kann. Diese Zündspannung wird in bekannter Weise mit Hochfrequenz durch einen Serienresonanzkreis aus einer Schwingdrossel gemäß dem einleitenden Teil des Patentanspruchs 1 und einem Schwingkreiskondensator erzeugt, wobei der letztere parallel zur MHD-Lampe geschaltet ist. Im Resonanzfall liegt an diesem Kondensator die benötigte Zündspannung. Die Resonanzbedingung erfordert, daß die Drossel eine hohe Güte aufweist, um die Zündspannung sicher zu erreichen.High-pressure metal vapor lamps require a high voltage to ignite the arc, which can be approximately 200 times or more the operating voltage. This ignition voltage is generated in a known manner at high frequency by a series resonant circuit from an oscillating choke according to the introductory part of patent claim 1 and an oscillating circuit capacitor, the latter being connected in parallel with the MHD lamp. In the event of resonance, the required ignition voltage is applied to this capacitor. The resonance condition requires that the choke be of high quality in order to safely reach the ignition voltage.

Da aber diese Drossel im Normalbetrieb auch den Brennstrom begrenzt, muß sie bei der lampenbedingten, niedrigen Frequenz eine hohe Induktivität haben.However, since this choke also limits the combustion current in normal operation, it must have a high inductance at the lamp-related, low frequency.

Bei den bekannten Schwingdrosseln gemäß dem einleitenden Teil des Patentanspruchs 1 ist die von dem Wickelgrund des Spulenkörpers umgebene Querschnittsfläche über die Länge des Luftspalts konstant und so groß wie im Bereich des Feldlinienübertritts von der Luft in das Ferrit des Kerns (sh.Fig.1).In the known oscillating chokes according to the introductory part of claim 1, the cross-sectional area surrounded by the winding base of the coil former is constant over the length of the air gap and as large as in the area of the field line transition from the air into the ferrite Kerns (see Fig. 1).

Der Erfindung liegt die Aufgabe zugrunde, eine Schwingdrossel gemäß dem einleitenden Teil des Patentanspruchs 1 zu schaffen, die im Vergleich zu den bekannten Schwingdrosseln bei gleichen Abmessungen eine bessere Güte oder bei gleicher Güte kleinere Abmessungen aufweist, d.h. die beiden, sehr unterschiedlichen Betriebsarten:

  • a) Hoher Blindstrom bei der Zündresonanzfrequenz ohne Sättigungserscheinungen,
  • b) Große Induktivität für den Betrieb mit der Brennfrequenz bei gleichzeitig hoher Güte, um die Leistungsverluste in der Drossel klein zu halten,

volumenoptimiert erfüllt.The invention has for its object to provide an oscillating choke according to the introductory part of claim 1, which compared to the known oscillating chokes has a better quality with the same dimensions or smaller dimensions with the same quality, ie the two, very different operating modes:
  • a) high reactive current at the ignition resonance frequency without saturation,
  • b) Large inductance for operation with the burning frequency with high quality at the same time in order to keep the power losses in the choke small,

volume-optimized fulfilled.

Die vorgenannte Aufgabe wird durch die im kennzeichnenden Teil des Patentanspruchs 1 genannten Merkmale gelöst.The above object is achieved by the features mentioned in the characterizing part of patent claim 1.

Die Unteransprüche haben bevorzugte Ausführungsformen der Schwingdrossel gemäß Patentanspruch 1 zum Gegenstand.The subclaims relate to preferred embodiments of the oscillating throttle according to claim 1.

Die Erfindung wird nachstehend anhand der Zeichnung an Ausführungsbeispielen noch näher erläutert.The invention is explained in more detail below with the aid of exemplary embodiments.

In der Zeichnung zeigt :

Fig.1
den Aufbau einer herkömmlichen bekannten Schwingdrossel im Schnitt von der Seite gesehen,
Fig.2-Fig.4
jeweils eine andere bevorzugte Ausführungsform der erfindungsgemäßen Schwingdrossel in gleicher Darstellung wie in Fig. 1, und
Fig.5
die Schwingdrossel gemäß Fig.4 im Schnitt entlang der Schnittlinie V-V in Fig.4 von oben gesehen.
The drawing shows:
Fig. 1
the construction of a conventional known choke seen in section from the side,
Fig.2-Fig.4
in each case another preferred embodiment of the oscillating throttle according to the invention in the same representation as in Fig. 1, and
Fig. 5
4 seen in section along the section line VV in Figure 4 from above.

Die Fig.1 zeigt den Aufbau einer herkömmlichen bekannten Schwingdrossel. Um eine Sättigung während des Zündvorgangs zu vermeiden, ist ein sehr großer Luftspalt 1 innerhalb der Wicklung vorgesehen, die sich auf einem Spulenkörper 2 befindet, deren vom Wickelgrund 2a umgebene Fläche A über die Länge des Luftspalts 1 einen konstanten Querschnitt aufweist. Die Größe des Querschnitts B der Fläche 1a beim Übergang der magnetischen Feldlinien von der Luft in das Ferrit des Kerns 3 ist so gewählt, daß die zulässige maximale Sättigungsinduktion des verwendeten Ferrits nicht überschritten wird.1 shows the structure of a conventional known oscillating choke. In order to avoid saturation during the ignition process, a very large air gap 1 is provided within the winding, which is located on a coil former 2, the surface A of which is surrounded by the winding base 2a has a constant cross section over the length of the air gap 1. The size of the cross section B of the surface 1a at the transition of the magnetic field lines from the air into the ferrite of the core 3 is chosen so that the permissible maximum saturation induction of the ferrite used is not exceeded.

Die Erfindung beruht auf der Erkenntnis, daß die am Übergang der magnetischen Feldlinien von der Luft in das Ferrit des Kerns benötigte Begrenzung der Induktion für die Luftstrecke nicht erforderlich ist, daß aus diesem Grunde, wie in Fig. 2 bis Fig.4 dargestellt, die magnetisch wirksame Fläche in der Luftstrecke stark verringert werden kann und daß sich dadurch gegenüber einer bekannten Schwingdrosssel von konstantem Querschnitt der vom Wickelgrund umschlossenen Fläche folgende Vorteile ergeben:

  • 1. Eine Erhöhung der Windungszahl bei vorgegebener Drahtlänge. Hierdurch steigt die Güte erheblich, da bei gleichem ohmschen Widerstand die Induktivität stark zunimmt.
  • 2. Durch den größeren Wickelraum kann der Drahtquerschnitt vergrößert werden, wodurch noch einmal die Güte verbessert wird.
  • 3. Bei vorgegebener Güte kann der Kernquerschnitt verkleinert werden, da durch die beschriebene Querschnittsverringerung im Luftbereich eine größere Scherung ermöglicht wird.
The invention is based on the knowledge that the limitation of the induction required for the air gap at the transition of the magnetic field lines from the air into the ferrite of the core is not necessary, that for this reason, as shown in FIGS. 2 to 4, the magnetically effective area in the air gap can be greatly reduced and that this has the following advantages over a known oscillating throttle with a constant cross section of the area enclosed by the winding base:
  • 1. An increase in the number of turns for a given wire length. This increases the quality considerably, since the inductance increases sharply with the same ohmic resistance.
  • 2. Due to the larger winding space, the wire cross section can be increased, which improves the quality once again.
  • 3. With a specified quality, the core cross section can be reduced because the described reduction in cross-section in the air area enables greater shear.

Die Fig.2 zeigt eine Ausführungsform der erfindungsgemäßen Schwingdrossel, bei der der Kern 3' aus zwei E-Kernhälften 3a' jeweils mit gegenüber den Außenschenkeln 3b' kürzerem Mittelschenkel 3c' besteht. Die Mittelschenkel 3c' der Kernhälften 3a' ragen in einen Spulenkörper 2' hinein und lassen zwischen sich einen Luftspalt 1' frei. Die von dem Wickelgrund 2a' des Spulenkörpers 2' umschlossene Querschnittsfläche A ist im Bereich des Luftspalts 1' gegenüber der Querschnittsfläche B im Bereich des Feldlinienaustritts von der Luft in das Ferrit des Kerns 3' verkleinert, wobei die letztgenannte Querschnittsfläche B so groß ist, daß die zugehörige Induktion das Ferrit gerade noch nicht in Sättigung bringt.2 shows an embodiment of the oscillating throttle according to the invention, in which the core 3 'consists of two E-core halves 3a' each with a middle leg 3c 'shorter than the outer legs 3b'. The middle legs 3c 'of the core halves 3a' protrude into a coil former 2 'and leave an air gap 1' between them. The cross-sectional area A enclosed by the winding base 2a 'of the coil former 2' is reduced in the area of the air gap 1 'compared to the cross-sectional area B in the area of the field line exit from the air into the ferrite of the core 3', the latter cross-sectional area B being so large that the associated induction just does not bring the ferrite into saturation.

Die Fig. 3 zeigt eine Ausführung der erfindungsgemäßen Schwingdrossel, bei der die Scherung so vergrößert ist, daß beim Kern 3'' völlig auf einen Mittelschenkel verzichtet werden kann. Der Ferritkern 3'' besteht nur noch aus einem Rahmen, der die Permeabilität vergrößert und die äußeren Feldlinien bündelt, wodurch eine magnetische Abschirmfunktion erreicht wird.Fig. 3 shows an embodiment of the oscillating throttle according to the invention, in which the shear is increased so that a central leg can be completely dispensed with in the core 3 ″. The ferrite core 3 ″ now only consists of a frame that increases the permeability and bundles the outer field lines, as a result of which a magnetic shielding function is achieved.

Eine Rahmenkonstruktion wie bei Fig. 3 kann gemäß Fig. 4 auch für die Realisierung einer Schwingdrossel der Art gemäß Fig. 2 verwendet werden. Die bei der Schwingdrossel nach Fig. 2 zur Erhöhung der Permeabilität vorhandenen kurzen Mittelschenkelabschnitte 3c' des Kerns 3' sind hier zusätzlich zu dem Ferritrahmen 3''' als Einzelstücke 3e''' aus Ferrit in den Spulenkörper 2''' eingelegt. Der Vorteil der Rahmenkonstruktion ist, daß das Volumen der Spule durch höhere Kern-Außenschenkel (Fig. 5) bei gleichem Querschnitt verkleinert wird, und daß eine gute magnetische Abschirmung erreicht wird.A frame construction as in FIG. 3 can also be used in accordance with FIG. 4 for the realization of an oscillating choke of the type in FIG. 2. The short middle leg sections 3c 'of the core 3' present in the oscillating choke according to FIG. 2 to increase the permeability are inserted here in addition to the ferrite frame 3 '''as individual pieces 3e''' made of ferrite into the coil former 2 '''. The advantage of the frame construction is that the volume of the coil is reduced by higher core outer legs (Fig. 5) with the same cross-section, and that a good magnetic Shielding is achieved.

Die Abschirmwirkung kann noch dadurch verbessert werden, daß der Ferritrahmenkern 3'', 3''' aus einem Stück besteht und somit als solcher keinen Luftspalt aufweist.The shielding effect can be further improved in that the ferrite frame core 3 ″, 3 ″ ″ consists of one piece and thus has no air gap as such.

Für die Spannungsfestigkeit der Wicklung ist der Spulenkörper 2', 2'', 2''' zweckmäßigerweise, wie in der Zeichnung dargestellt, in Kammertechnik aufgebaut.For the dielectric strength of the winding, the coil body 2 ', 2' ', 2' '' is expediently constructed in chamber technology, as shown in the drawing.

Vorzugsweise nimmt, wie in Fig. 2 bis Fig. 4 dargestellt, die vom Spulenkörperwickelgrund umschlossene Querschnittsfläche von den Enden des Luftspalts zu dessen Mitte hin kontinuierlich ab. Besonders vorteilhaft ist es, wenn die Querschnittsabnahme dem Verlauf der Feldlinien angepaßt ist.Preferably, as shown in FIGS. 2 to 4, the cross-sectional area enclosed by the coil former base decreases continuously from the ends of the air gap towards the center thereof. It is particularly advantageous if the cross-sectional decrease is adapted to the course of the field lines.

Claims (6)

Schwingdrossel, deren Ferrit-Kern im Bereich des Spulenkörpers einen Luftspalt aufweist, insbesondere zum Betreiben von Metallhochdrucklampen, die mit einem niederfrequenten Brennstrom arbeiten und deren Zündspannung mit Hochfrequenz erzeugt wird, dadurch gekennzeichnet, daß die von dem Wickelgrund (2a', 2a'',2a''') des Spulenkörpers (2',2'',2''') umgebene Querschnittsfläche (A) im Bereich des Luftspalts (1',1'',1''') gegenüber der Querschnittsfläche (B) im Bereich des Feldlinienübertritts von der Luft in das Ferrit des Kerns (3',3'',3''') verkleinert ist, wobei die letztgenannten Querschnittsfläche (B) so groß ist, daß die zugehörige Induktion das Ferrit gerade noch nicht in Sättigung bringt.Oscillating choke, the ferrite core of which has an air gap in the region of the coil former, in particular for operating high-pressure metal lamps which work with a low-frequency combustion current and whose ignition voltage is generated at high frequency, characterized in that the winding base (2a ', 2a'', 2a ''') of the coil body (2', 2 '', 2 ''') surrounded cross-sectional area (A) in the area of the air gap (1', 1 '', 1 ''') compared to the cross-sectional area (B) in the area the field line crossing from the air into the ferrite of the core (3 ', 3'',3''') is reduced, the latter cross-sectional area (B) being so large that the associated induction just does not bring the ferrite into saturation. Schwingdrossel nach Anspruch 1, dadurch gekennzeichnet, daß der Spulenkörper (2',2'',2''') in Kammern unterteilt ist.Oscillating choke according to claim 1, characterized in that the coil body (2 ', 2'',2''') is divided into chambers. Schwingdrossel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Kern (3') E-förmig ist.Vibrating choke according to claim 1 or 2, characterized in that the core (3 ') is E-shaped. Schwingdrossel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Kern U-förmig ist.Oscillating choke according to claim 1 or 2, characterized in that the core is U-shaped. Schwingdrossel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Kern (3'',3''') als Rahmenkern ausgeführt ist.Vibration choke according to claim 1 or 2, characterized in that the core (3 '', 3 ''') as a frame core is executed. Schwingdrossel nach Anspruch 5, dadurch gekennzeichnet, daß zusätzlich zu dem Rahmenkern (3''') in den Spulenkörper (2''') Ferritstücke (3e''') eingelegt sind.Oscillating choke according to claim 5, characterized in that in addition to the frame core (3 '''), ferrite pieces (3e''') are inserted into the coil body (2 ''').
EP91103237A 1990-03-07 1991-03-04 Reactor coil, particularly for operating high-pressure metal vapour lamps Expired - Lifetime EP0445704B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4007148A DE4007148A1 (en) 1990-03-07 1990-03-07 VOLUME-OPTIMIZED VIBRATION THROTTLE FOR HIGH CONTROL AND HIGH GOETE
DE4007148 1990-03-07

Publications (3)

Publication Number Publication Date
EP0445704A2 true EP0445704A2 (en) 1991-09-11
EP0445704A3 EP0445704A3 (en) 1992-08-12
EP0445704B1 EP0445704B1 (en) 1993-11-03

Family

ID=6401603

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91103237A Expired - Lifetime EP0445704B1 (en) 1990-03-07 1991-03-04 Reactor coil, particularly for operating high-pressure metal vapour lamps

Country Status (2)

Country Link
EP (1) EP0445704B1 (en)
DE (2) DE4007148A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4010473A1 (en) * 1990-03-31 1991-10-02 Vogt Electronic Ag THROTTLE TRANSFORMER COMBINATION FOR THE OPERATION OF METAL VAPOR HIGH PRESSURE (MHD) LAMPS FROM ON-VEHICLE NETWORKS OF VEHICLES

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2143037A1 (en) * 1971-08-27 1973-03-01 Joseph INDUCTIVE ELEMENT
EP0071008A1 (en) * 1981-07-25 1983-02-09 TELEFUNKEN Fernseh und Rundfunk GmbH Line transformer, in particular a transformer for a television receiver
JPS5922305A (en) * 1982-07-28 1984-02-04 Toshiba Electric Equip Corp Leakage transformer for high frequency
JPH01140613A (en) * 1987-11-26 1989-06-01 Matsushita Electric Works Ltd Choke coil for high frequency

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE922423C (en) * 1942-08-21 1955-01-17 Aeg Transformer or reactor with a strongly flattened current-voltage characteristic in the upper part
FR2077445B1 (en) * 1969-04-14 1973-07-13 Ibm France
US4298853A (en) * 1980-03-27 1981-11-03 General Electric Company Compact high voltage shunt reactor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2143037A1 (en) * 1971-08-27 1973-03-01 Joseph INDUCTIVE ELEMENT
EP0071008A1 (en) * 1981-07-25 1983-02-09 TELEFUNKEN Fernseh und Rundfunk GmbH Line transformer, in particular a transformer for a television receiver
JPS5922305A (en) * 1982-07-28 1984-02-04 Toshiba Electric Equip Corp Leakage transformer for high frequency
JPH01140613A (en) * 1987-11-26 1989-06-01 Matsushita Electric Works Ltd Choke coil for high frequency

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 393 (E-814)31. August 1989 & JP-A-1 140 613 ( MATSUSHITA ) 1. Juni 1989 *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 107 (E-245)19. Mai 1984 & JP-A-59 022 305 ( TOUSHIBA DENZAI ) 4. Februar 1984 *

Also Published As

Publication number Publication date
DE4007148A1 (en) 1991-09-12
DE59100540D1 (en) 1993-12-09
EP0445704A3 (en) 1992-08-12
DE4007148C2 (en) 1992-07-02
EP0445704B1 (en) 1993-11-03

Similar Documents

Publication Publication Date Title
EP0629311B1 (en) Coil for high-voltage transformer
EP1405322B1 (en) Swinging choke
DE10260246B4 (en) Coil arrangement with variable inductance
DE19728667A1 (en) High voltage transformer for gas discharge lamp
EP2546842A2 (en) Coil for limiting energy
DE3833916C2 (en)
DE19751548C2 (en) Ignition transformer for a discharge lamp
DE4117288A1 (en) HIGH VOLTAGE IGNITION TRANSMITTER FOR IGNITING AND OPERATING AC HIGH PRESSURE GAS DISCHARGE LAMPS IN MOTOR VEHICLES
EP0585597B1 (en) High voltage line transformer for a TV receiver
EP0445704B1 (en) Reactor coil, particularly for operating high-pressure metal vapour lamps
DE4227757A1 (en) Inductance device for filter of electromagnetic device e.g. magnetron - has ferrite cores formed from multi-facet bars with air cooling channel along centre that are inserted into coils
DE2628524A1 (en) HIGH VOLTAGE WINDING FROM SEVERAL SUB-COILS FOR VOLTAGE CONVERTER,
EP0320018A1 (en) Reactor coil
DE4311126C2 (en) Current-compensated multiple choke in a compact design
DE4208706C2 (en) Ignition coil for an ignition system of an internal combustion engine
EP0740318B1 (en) High voltage transformer for a television receiver
EP0451628A1 (en) Choke-coil/transformer combination for operating high pressure metal vapor lamps of vehicle electrical systems
DE3900286C2 (en)
EP0127119A1 (en) Electomagnetic appliance for high-frequency power circuits, particularly a transformer or reactive coil
DE869818C (en) Coil, which consists of an electrical conductor located in a regular area
DE4008424C2 (en)
DE3144840A1 (en) High-reactance autotransformer
DE1613568C3 (en) Mania Ikern choke coil
EP0152096B1 (en) Ballast unit for gas discharge lamps
DE102020100190A1 (en) Inductive component with an operating frequency in the medium frequency range

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: A2

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19920229

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 19930326

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 59100540

Country of ref document: DE

Date of ref document: 19931209

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: BUGNION S.P.A.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19940119

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20010227

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20010302

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010530

Year of fee payment: 11

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020304

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021001

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20020304

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021129

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050304