EP0505947B1 - Transformator für Gasentladungsröhren - Google Patents

Transformator für Gasentladungsröhren Download PDF

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Publication number
EP0505947B1
EP0505947B1 EP92104916A EP92104916A EP0505947B1 EP 0505947 B1 EP0505947 B1 EP 0505947B1 EP 92104916 A EP92104916 A EP 92104916A EP 92104916 A EP92104916 A EP 92104916A EP 0505947 B1 EP0505947 B1 EP 0505947B1
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EP
European Patent Office
Prior art keywords
voltage winding
transformer
voltage
output terminals
winding
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
EP92104916A
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English (en)
French (fr)
Other versions
EP0505947A2 (de
EP0505947A3 (en
Inventor
Shintetsu Amano
Isao Hori
Fumio Ichimiya
Toshihiro Matsui
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.)
Sanyo Electric Co Ltd
Lecip Corp
Original Assignee
Sanyo Electric Co Ltd
Sanyo Denki Seisakusho KK
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 JP06649291A external-priority patent/JP3401021B2/ja
Application filed by Sanyo Electric Co Ltd, Sanyo Denki Seisakusho KK filed Critical Sanyo Electric Co Ltd
Publication of EP0505947A2 publication Critical patent/EP0505947A2/de
Publication of EP0505947A3 publication Critical patent/EP0505947A3/en
Application granted granted Critical
Publication of EP0505947B1 publication Critical patent/EP0505947B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/08—High-leakage transformers or inductances
    • H01F38/10—Ballasts, e.g. for discharge lamps
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
    • H05B41/2821—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage
    • H05B41/2822—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage using specially adapted components in the load circuit, e.g. feed-back transformers, piezoelectric transformers; using specially adapted load circuit configurations

Definitions

  • the present invention relates to a transformer for a gas tube sign used for lighting one or more neon or argon gas tubes by stepping up a commercial AC power supply to a high voltage.
  • US-A-4 667 132 discloses a transformer for operating neon lamps, which comprises a longitudinally split secondary winding (into five sections), producing between 5,000 and 15,000 Volt, the windings being made of insulated wire.
  • This transformer is of the leakage type.
  • Fig. 1 shows a simple composition of a transformer for gas a tube sign, which will hereinafter be called a neon transformer.
  • a low-voltage winding (primary winding) 12 is wound on a main iron core 11 and, separately from the low-voltage winding 12, a high-voltage winding (secondary winding) 13 is wound on the main iron core 11.
  • a leakage iron core 14 is disposed between the low-voltage winding 12 and the high-voltage winding 13.
  • the main iron core 11 is structured so that a closed magnetic circuit is formed in conjunction with another iron core or cores.
  • AC power for instance utility AC power, is applied between both ends of the low-voltage winding 12 to generate a high voltage between both ends of the high-voltage winding 13.
  • the neon transformer is operated to discharge and light up a neon gas tube or an argon gas tube not illustrated in Fig. 1 by said high voltage.
  • FIG. 2 A conventional high-voltage winding 13 is shown in Fig. 2 where the main iron core 11 penetrates through a bobbin 15 on which an insulated copper wire 16 is wound in order while intercalating interlayer paper (layer insulation paper) 17 between adjacent layers of the copper wire.
  • the interlayer paper 17 is intended to provide complete insulation between adjacent layers of the copper wire 16.
  • a period T A represents the duration of the transient vibration, in which discharging is so unstable as creating flickering. Discharging is stabilized in a following period T B . If the transient vibration period T A is long in excess, the system will not be suitable for a gas tube sign. With a larger number of gas tubes (or a longer total length of gas tubes) connected to a neon transformer in series, the transient vibration period T A becomes longer.
  • the high-voltage winding 13 of the neon transformer is shown as an equivalent circuit in Fig. 4.
  • inductances L each representing one turn of the copper wire 16 are connected in series to each other.
  • capacitance Cs between both ends of each inductance L and a transformer casing (or iron core), respectively.
  • Cw between each inductance L and a parallel adjacent line.
  • Such a distributed constant circuit as described above exists for each winding layer.
  • a capacitance C L may also exist between each pair of adjacent winding layers, according to the concept of equivalent circuit.
  • a gas tube (or a series connection of gas tubes) 18 is connected between both terminals of said entire distributed constant circuit.
  • each capacitance is charged alternately with positive and negative charges every half cycle of AC power.
  • Each of such charging is activated in a resonance state of the capacitance and the inductance, while creating transient vibration.
  • a transient vibration period T A is created as shown in Fig. 3.
  • Energy charged in all capacitances Cs, Cw, and C L is expressed by CV 2 /2 (where C and V represent a total capacitance and a voltage across both ends of the high-voltage winding 13, respectively). Therefore, the larger the total capacitance C and the higher the voltage become, the larger is the amount of charges supplied to each capacitance. Also, time to supply the charges is made longer. In other words, the larger the capacitance component of the high-voltage winding 13, the longer the transient vibration period T A results. Furthermore, a higher voltage V brings about a longer transient vibration period T A .
  • An object of the present invention is to provide a neon transformer whose lighting capability can be improved, whereby an allowable total length of gas tubes to be connected is increased.
  • Another object of the present invention is to offer such a neon transformer which can be easily manufactured.
  • the high-voltage winding is wound in 4 or more split sections without intercalating any interlayer paper.
  • This invention is intended to increase, with respect to a conventional neon transformer, the number of series connected neon or argon tubes or the length of a neon or argon tube which can be connected across the high-voltage winding.
  • it is needed to increase the number of series connected neon or argon gas tubes each having a unit length at least by one as compared with the number of tubes which can be connected across the non-split type high-voltage winding of a conventional neon transformer, or to increase the length of a neon or argon tube at least by the unit length as compared with that of a neon or argon tube which can be connected across the non-split type high-voltage winding of a conventional neon transformer.
  • any of the following neon transformers is a prerequisite for this invention.
  • the high-voltage winding is wound on a coil bobbin comprising a cylindrical drum with a plurality of flanges disposed in an axial direction on the outer periphery thereof.
  • the high-voltage winding is split and wound on the drum.
  • compound impregnation accelerating portions that are shaped in an elevated or recessed form while extending from the outer fringes thereof up to the drum. Said compound impregnation accelerating portions are composed in extension on the peripheral surface of the drum.
  • FIG. 5 shows an example of the high-voltage winding, an essential portion of the embodiment according to the present invention.
  • a main iron core 11 is penetrated into a cylindrical drum 15a of a bobbin 15.
  • the bobbin 15 is composed in such a manner that, on the cylindrical drum 15a, there are flanges 21 at both ends and 4 flanges 22 provided integrally on the outer periphery of the drum 15a while dividing a space between the flanges 21 at both ends into 5 equal sections in the axial direction.
  • An insulated copper wire (for example, a polyvinyl formal or other low-dielectric-constant material insulated copper wire) 16 is wound in order by a predetermined number of layers without intercalating any interlayer paper, in a terminal section as separated by the flanges on the outer periphery of the drum 15a.
  • the copper wire is wound for the adjacent section thereto, while winding the copper wire sequentially in following sections in the same way.
  • the high-voltage winding 13 is divided into 5 sections where the copper wire is wound in this embodiment.
  • An inductance L of a turn of the winding is the same as that of a conventional transformer.
  • a capacitance Cs to the casing and a capacitance Cw between lines are also the same as those in a conventional transformer.
  • an interlayer capacitance of the embodiment becomes a value peculiar to each section of divisional winding, namely a capacitance C L ' smaller than a conventional value.
  • the interlayer capacitance C L ' becomes one fifth of the conventional interlayer capacitance C L shown in Fig. 4, by ignoring the effect of the interlayer paper. Since five of these sections are connected in series, the whole interlayer capacitance becomes 1/25 of the conventional interlayer capacitance C L . Because no interlayer paper is used actually according to the present invention, the value becomes larger than the above.
  • a capacitance C of the neon transformer, when looked from the load side, is determined mainly by C L ' and Cw. Therefore, according to the present invention, the capacitance C of the high-voltage winding 13 is made smaller than conventional values. Consequently, a transient vibration period T A of the embodiment becomes shorter than conventional values.
  • a lighting capability of a neon tube is improved to have a length of a connectable gas tube (or a number of gas tubes) made larger.
  • a neon transformer with 2-split winding is also used to reduce an interlayer voltage.
  • a lighting capability of an ordinary neon transformer is expressed in a maximum total length of lighted tubes when a rated voltage is applied, the length of all connected neon or argon gas tubes is actually limited to a length about 0.8 - 0.9 times as large as said maximum length of lighted tubes or shorter in considering performance variances in manufacturing the neon or argon gas tubes, variation in power supply voltage fluctuation of the characteristics of the neon transformer and so on.
  • the number of split winding sections of the high-voltage winding be four or greater for either of a transformer with the secondary voltage of 8 kV or higher and the secondary short-circuit current of 20 mA or larger and a transformer with the secondary voltage of 6 kV or higher and the secondary short-circuit current of 30 mA or larger, and in the case of argon gas tubes, the number of split winding sections of the high-voltage winding be four or greater for either of a transformer with the secondary voltage of 5 kV or higher and the secondary short-circuit current of 20 mA or larger and a transformer with the secondary voltage of 4 kV or higher and the secondary short-circuit 30 mA or larger.
  • Methods to connect the high-voltage winding 13 in operation are classified into three types; first, it is not connected to the ground; second, one end of the high-voltage winding 13 is connected to the transformer casing that is grounded; and a center point thereof is grounded because harmful electric shock may occur with a secondary short-circuit current of 25 mA or more, thirdly.
  • connection details are shown in Fig. 9 where a low-voltage winding 12 is wound on the main iron core 11.
  • split high-voltage windings 13a and 13b are wound on the main iron core 11, while leakage iron cores 14a and 14b being positioned in between the low-voltage winding 12 and the high-voltage windings 13a and 13b.
  • a connection point between the high-voltage windings 13a and 13b, namely a center point of the high-voltage winding 13 is connected to for instance the transformer casing and electrically grounded as shown in Fig. 10.
  • each of the high-voltage windings 13a and 13b is wound in two or more split sections because the high-voltage winding 13 is divided into the high-voltage windings 13a and 13b.
  • the neon transformer according to the present invention as described above is housed in a cylindrical casing 31 one end of which is opened and the other end is closed, as a transformer unit 32 as shown in Fig. 11.
  • a 3-leg iron core is made of silicon steel sheets.
  • the high-voltage winding 13 is wound and supported thereby.
  • a space remaining in the casing 31, except for the transformer unit 32, is filled with an insulating compound 35.
  • Said insulating compound 35 comprises a low-viscosity resin (Epoxy, etc.) and a filler (insulation particles such as silicon sand, etc.) which are filled in the casing 31 and then hardened by heating.
  • a coil bobbin 15 comprises a drum 15a with a square-cylindrical section, on which a copper wire 16 is wound, and flanges 21 and 22 formed in plurality (in this case, 7 pieces) equipped on the outer periphery of said drum 15a.
  • Said flanges 21 and 22 are formed substantially in a square shape at equal intervals along an axial direction of the drum 15a.
  • Grooves 36 are provided as recesses to accelerate the impregnation of the insulating compound 35 from the outer fringes of each opposite surface of the flanges 21 and 22, up to the outer periphery of the drum 15a.
  • Each groove 36 is formed to have a semi-circular section.
  • each groove 36 is structured so that each groove 36 on both surfaces of a flange 22 is dislocated from each other. Also, each groove 36 is extended as a groove 37 on the outer periphery of the drum 15a in an axial direction thereof from a position on the drum 15a to another position thereon while arriving at another flange.
  • the diameter of the copper wire 16 is 50 ⁇ m to 100 ⁇ m, approximately and wound on the bobbin 15 by for instance several million turns.
  • a winding start portion 16a of the copper wire 16 is located near the drum 15a and a winding end portion 16b is positioned near an outer fringe of the flange 21.
  • a pair of lead wires 16c led out of the copper wire 16 is connected to a pair of output terminals 38 in the secondary side as shown in Fig. 11.
  • a low-voltage winding 12 is wound and supported in a lower part of the high-voltage winding 13, with a separating gap.
  • Lead wires (not illustrated) of said low-voltage winding 12 are connected to a power-factor improvement capacitor 39 and input lead wires, not illustrated.
  • a pair of insulation spacers 41 is inserted and disposed to insulate them.
  • a pair of leakage iron cores 14 is mounted and disposed between said insulation spacers 41 and the low-voltage winding 12.
  • an input unit 42 incorporating a fuse, etc. and a bushing 43 to insulate the output terminals 38.
  • the transformer unit 32, etc. When the transformer unit 32, etc. are housed into the casing 31 while charging the insulating compound 35 into the remaining space, the insulating compound 35 is impregnated between each turn of the wire of the high-voltage winding 13.
  • the insulating compound 35 is impregnated from the flanges 21 and 22 toward the drum 15a through the grooves 36 and 37. Consequently, the high-voltage winding 13 is completely and satisfactorily impregnated with the insulating compound 35 between each turn of the wires which are completely insulated eventually.
  • the winding must be insulated by impregnating a varnish under a reduced pressure. At that time, the winding should be treated through various processes including preparatory drying, impregnation of varnish and hardening by heating, requiring a minimum processing time as long as three days.
  • a varnish insulating process can be omitted and the transformer unit 32 can be housed directly into the casing 31 and then insulated. Thus, a work efficiency can be improved while reducing a manufacturing cost in the stage of products in process.
  • elevations 44 and 45 shown in Fig. 14 and 15 may also be provided in place of the grooves 36 and 37.
  • Said elevations 44 and 45 have semi-circular sections and are formed in three rows in each quadrant of the flanges 21 and 22 (4 quadrants in this embodiment).
  • the elevations 44 are projected in opposition to each other on both surfaces of a flange 22.
  • the copper wire 16 is wound on the drum 15a so that it engages with the peaks of the elevations 44 and 45.
  • the shapes of the grooves 36 and 37 and the elevations 44 and 45 may also be shaped otherwise, for instance in a triangular section. It is also possible to provide a plurality of sets of several grooves 36 and 37 in contact with each other. Furthermore, the grooves 37 and the elevations 45 can also be formed obliquely to an axial center. The grooves 36 and 37 may also be formed substantially on all flanges.
  • the high-voltage winding is wound in four or more split sections. Therefore, an interlayer capacitance can be reduced considerably. Thereby, a maximum total length of lighted tube can be made larger than that of a conventional winding, by a length of one or more back border tubes. Therefore, the number of transformers required for a gas tube sign board can be reduced resulting in more easy and simple construction work.
  • an automatic winding machine can be used because no interlayer paper is used, so manufacturing becomes easier.
  • the effect of the present invention is significant even at a lower voltage.
  • a varnish-impregnating process is no longer required according to the present invention, by constructing a recessed or elevated accelerating portion to accelerate impregnating an insulating compound.
  • the neon transformer can be manufactured at lower cost during shorter manufacturing time.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Claims (6)

  1. Leuchtröhrenanzeige-Transformator, mit einem einen geschlossenen magnetischen Kreis bildenden Haupteisenkern, einer Niederspannungswicklung und einer Hochspannungswicklung, die jeweils an unterschiedlichen Stellen um den Haupteisenkern gewickelt sind, und einem Streu-Eisenkern, der zwischen der Niederspannungswicklung und der Hochspannungswicklung angeordnet ist, wobei bei dem Transformator die Nennausgangsspannung von ca. 8000 V oder mehr zwischen Ausgangsanschlüssen der Hochspannungswicklung erhältlich ist, wenn die Niederspannungswicklung mit einem handelsüblichen Wechselstromnetz verbunden ist, und der lastlose Nennausgangsstrom von ca. 20 mA oder mehr durch die Hochspannungswicklung fließt, wenn die Ausgangsanschlüsse der Hochspannungswicklung kurzgeschlossen sind, wobei die Ausgangsanschlüsse der Hochspannungswicklung zum Anschluß mindestens einer mit Neongas gefüllten Neonröhre vorgesehen sind;
       wobei der Transformator dadurch gekennzeichnet ist, daß die Hochspannungswicklung in vier oder mehr Teilabschnitten ohne Einlegen von Lagenisolationspapier zwischen benachbarten Drahtlagen in jedem Teilabschnitt um den Hauptkern gewickelt ist, wodurch die Anzahl in Reihe hintereinander geschalteter Neonröhren oder die Länge einer Neonröhre, die zwischen den Ausgangsansschlüssen der Hochspannungswicklung angeschlossen werden kann, erhöht wird.
  2. Leuchtröhrenanzeige-Transformator, mit einem einen geschlossenen magnetischen Kreis bildenden Haupteisenkern, einer Niederspannungswicklung und einer Hochspannungswicklung, die jeweils an unterschiedlichen Stellen um den Haupteisenkern gewickelt sind, und einem Streu-Eisenkern, der zwischen der Niederspannungswicklung und der Hochspannungswicklung angeordnet ist, wobei bei dem Transformator die Nennausgangsspannung von ca. 6000 V oder mehr zwischen Ausgangsanschlüssen der Hochspannungswicklung erhältlich ist, wenn die Niederspannungswicklung mit einem handelsüblichen Wechselstromnetz verbunden ist, und der lastlose Nennausgangsstrom von ca. 30 mA oder mehr durch die Hochspannungswicklung fließt, wenn die Ausgangsanschlüsse der Hochspannungswicklung kurzgeschlossen sind, wobei die Ausgangsanschlüsse der Hochspannungswicklung zum Anschluß mindestens einer mit Neongas gefüllten Neonröhre vorgesehen sind;
       wobei der Transformator dadurch gekennzeichnet ist, daß die Hochspannungswicklung in vier oder mehr Teilabschnitten ohne Einlegen von Lagenisolationspapier zwischen benachbarten Drahtlagen in jedem Teilabschnitt um den Hauptkern gewickelt ist, wodurch die Anzahl in Reihe hintereinander geschalteter Neonröhren oder die Länge einer Neonröhre, die zwischen den Ausgangsansschlüssen der Hochspannungswicklung angeschlossen werden kann, erhöht wird.
  3. Leuchtröhrenanzeige-Transformator, mit einem einen geschlossenen magnetischen Kreis bildenden Haupteisenkern, einer Niederspannungswicklung und einer Hochspannungswicklung, die jeweils an unterschiedlichen Stellen um den Haupteisenkern gewickelt sind, und einem Streu-Eisenkern, der zwischen der Niederspannungswicklung und der Hochspannungswicklung angeordnet ist, wobei bei dem Transformator die Nennausgangsspannung von ca. 5000 V oder mehr zwischen Ausgangsanschlüssen der Hochspannungswicklung erhältlich ist, wenn die Niederspannungswicklung mit einem handelsüblichen Wechselstromnetz verbunden ist, und der lastlose Nennausgangsstrom von ca. 20 mA oder mehr durch die Hochspannungswicklung fließt, wenn die Ausgangsanschlüsse der Hochspannungswicklung kurzgeschlossen sind, wobei die Ausgangsanschlüsse der Hochspannungswicklung zum Anschluß mindestens einer mit Argongas und einer sehr kleinen Quecksilbermenge gefüllten Argonröhre vorgesehen sind;
       wobei der Transformator dadurch gekennzeichnet ist, daß die Hochspannungswicklung in vier oder mehr Teilabschnitten ohne Einlegen von Lagenisolationspapier zwischen benachbarten Drahtlagen in jedem Teilabschnitt um den Hauptkern gewickelt ist, wodurch die Anzahl in Reihe hintereinander geschalteter Argonröhren oder die Länge einer Argonröhre, die zwischen den Ausgangsansschlüssen der Hochspannungswicklung angeschlossen werden kann, erhöht wird.
  4. Leuchtröhrenanzeige-Transformator, mit einem einen geschlossenen magnetischen Kreis bildenden Haupteisenkern, einer Niederspannungswicklung und einer Hochspannungswicklung, die jeweils an unterschiedlichen Stellen um den Haupteisenkern gewickelt sind, und einem Streu-Eisenkern, der zwischen der Niederspannungswicklung und der Hochspannungswicklung angeordnet ist, wobei bei dem Transformator die Nennausgangsspannung von ca. 4000 V oder mehr zwischen Ausgangsanschlüssen der Hochspannungswicklung erhältlich ist, wenn die Niederspannungswicklung mit einem handelsüblichen Wechselstromnetz verbunden ist, und der lastlose Nennausgangsstrom von ca. 30 mA oder mehr durch die Hochspannungswicklung fließt, wenn die Ausgangsanschlüsse der Hochspannungswicklung kurzgeschlossen sind, wobei die Ausgangsanschlüsse der Hochspannungswicklung zum Anschluß mindestens einer mit Argongas und einer sehr kleinen Quecksilbermenge gefüllten Argonröhre vorgesehen sind;
       wobei der Transformator dadurch gekennzeichnet ist, daß die Hochspannungswicklung in vier oder mehr Teilabschnitten ohne Einlegen von Lagenisolationspapier zwischen benachbarten Drahtlagen in jedem Teilabschnitt um den Hauptkern gewickelt ist, wodurch die Anzahl in Reihe hintereinander geschalteter Argonröhren oder die Länge einer Argonröhre, die zwischen den Ausgangsansschlüssen der Hochspannungswicklung angeschlossen werden kann, erhöht wird.
  5. Leuchtröhrenanzeige-Transformator nach einem der Ansprüche 1, 2, 3 oder 4, bei dem die Hochspannungswicklung auf einen Spulenwickelkörper gewickelt ist, der einen zylindrischen Körper und eine Mehrzahl von Flanschen umfaßt, die auf dem äußeren Umfang des zylindrischen Körpers in dessen Axialrichtung angeordnet sind und den zylindrischen Körper in dessen Axialrichtung in zumindest vier Abschnitte unterteilen, wodurch die Hochspannungswicklung auf dem Spulenköper in seinen durch die Flansche unterteilten zumindest vier Abschnitten gewickelt ist, und
       eine rückspringende Struktur zur Beschleunigung einer Vergußmassen-lmprägnierung auf einer Platten-Oberfläche der Flansche von deren äußeren Rändern bis zu dem zylindrischen Körper ausgebildet ist.
  6. Leuchtröhrenanzeige-Transformator nach Anspruch 5, bei dem die rückspringende Struktur zur Beschleunigung einer Vergußmassen-lmprägnierung auch auf der Umfangsoberfläche des zylindrischen Körpers ausgebildet ist.
EP92104916A 1991-03-29 1992-03-20 Transformator für Gasentladungsröhren Expired - Lifetime EP0505947B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP66492/91 1991-03-29
JP06649291A JP3401021B2 (ja) 1991-03-29 1991-03-29 ネオン変圧器
JP100834/91U 1991-12-06
JP10083491 1991-12-06

Publications (3)

Publication Number Publication Date
EP0505947A2 EP0505947A2 (de) 1992-09-30
EP0505947A3 EP0505947A3 (en) 1994-03-09
EP0505947B1 true EP0505947B1 (de) 1996-12-27

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Application Number Title Priority Date Filing Date
EP92104916A Expired - Lifetime EP0505947B1 (de) 1991-03-29 1992-03-20 Transformator für Gasentladungsröhren

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EP (1) EP0505947B1 (de)
KR (1) KR960001143B1 (de)
DE (1) DE69216128T2 (de)
ES (1) ES2095973T3 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3138761B2 (ja) * 1992-11-25 2001-02-26 牛嶋 昌和 点灯回路
JP2733817B2 (ja) * 1993-08-30 1998-03-30 昌和 牛嶋 放電管用インバーター回路
ITVR940055U1 (it) * 1994-09-14 1996-03-14 Apparecchiatura per lampade a scarica, con accensione e riaccensione istantanea con lampada calda, particolarmente per lampade illuminazio
WO1999055124A1 (de) * 1998-04-18 1999-10-28 Manfred Diez Verfahren zum betreiben eines gasentladungsstrahlers, und anordnung zur durchführung eines solchen verfahrens
AU1180600A (en) * 1998-11-19 2000-06-13 Jem Co., Ltd. Electron-emitting device and electron-emitting electrode
EP2388647B1 (de) * 2001-11-30 2013-01-23 Panasonic Photo & Lighting Co., Ltd. Elektronisches Blitzgerät und Herstellungsverfahren dafür

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4547705A (en) * 1982-03-20 1985-10-15 Tdk Corporation Discharge lamp lightening device
JPH0217452Y2 (de) * 1984-10-30 1990-05-16
US4667132A (en) * 1986-03-03 1987-05-19 Dianalog Systems, Inc. Electronic transformer system for neon lamps
DE3741796A1 (de) * 1987-12-10 1989-06-22 Vogt Electronic Ag Nichtlineare schwingdrossel fuer elektronische vorschaltgeraete von leuchtstofflampen
DD292104A5 (de) * 1990-02-21 1991-07-18 Fahrzeugelektrik Chemnitz,De Zuendspule mit offenem eisenkreis

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Publication number Publication date
KR960001143B1 (ko) 1996-01-19
ES2095973T3 (es) 1997-03-01
EP0505947A2 (de) 1992-09-30
DE69216128T2 (de) 1997-05-22
EP0505947A3 (en) 1994-03-09
KR920018785A (ko) 1992-10-22
DE69216128D1 (de) 1997-02-06

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