EP0003528B1 - Elektronische Einrichtung zur Helligkeitsregulierung einer elektrischen Gasentladungslampe ohne Glühkathode - Google Patents

Elektronische Einrichtung zur Helligkeitsregulierung einer elektrischen Gasentladungslampe ohne Glühkathode Download PDF

Info

Publication number
EP0003528B1
EP0003528B1 EP79100202A EP79100202A EP0003528B1 EP 0003528 B1 EP0003528 B1 EP 0003528B1 EP 79100202 A EP79100202 A EP 79100202A EP 79100202 A EP79100202 A EP 79100202A EP 0003528 B1 EP0003528 B1 EP 0003528B1
Authority
EP
European Patent Office
Prior art keywords
voltage
lamp
current
control
ignition
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
Application number
EP79100202A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0003528A1 (de
Inventor
Hanspeter Coufal
Walter Bänziger
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.)
Elstrom Control System AG
Original Assignee
Elstrom Control System 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
Priority claimed from CH148878A external-priority patent/CH627899A5/de
Priority claimed from CH367978A external-priority patent/CH628766A5/de
Application filed by Elstrom Control System AG filed Critical Elstrom Control System AG
Publication of EP0003528A1 publication Critical patent/EP0003528A1/de
Application granted granted Critical
Publication of EP0003528B1 publication Critical patent/EP0003528B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • 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
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • H05B41/3924—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by phase control, e.g. using a triac
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current 
    • G05F1/12—Regulating voltage or current  wherein the variable actually regulated by the final control device is AC
    • G05F1/40—Regulating voltage or current  wherein the variable actually regulated by the final control device is AC using discharge tubes or semiconductor devices as final control devices
    • G05F1/42—Regulating voltage or current  wherein the variable actually regulated by the final control device is AC using discharge tubes or semiconductor devices as final control devices discharge tubes only
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/04—Dimming circuit for fluorescent lamps

Definitions

  • the present invention relates to an electronic device for regulating the brightness of an electrical gas discharge lamp fed from an AC network without a hot cathode, in particular a high-pressure metal vapor lamp.
  • Electronic devices which operate on the principle of so-called leading edge control are known and customary for regulating the brightness of filament lamps.
  • Such a device has a triac or thyristor arranged in the supply circuit of the lamp, to which an ignition voltage is periodically supplied, the ignition angle of which, measured from the zero crossing of the current, is controlled within each AC half-wave.
  • the known circuit arrangements for phase control there are those in which the firing angle can be changed as a function of an adjustable DC control voltage.
  • a device for regulating the brightness of gas discharge lamps of high luminance in which device in the feed circuit of the gas discharge lamp in series with a triac is the primary winding of a current transformer, the secondary winding of which is connected to the input of a rectifier arrangement, of which Output the mentioned control voltage is derived.
  • This control voltage is fed to one input of a differential amplifier, at the other input of which there is a DC control voltage which, for example, according to the desired brightness of the lamp is set manually.
  • the ignition angle of the ignition voltage is controlled in accordance with the difference between the control voltage and the control voltage, which results in automatic regulation of the lamp current in accordance with the control voltage, in the entire range from maximum to minimum lamp brightness.
  • resistors ensure that even with the external control voltage zero there is still an internal "control voltage" according to which the automatic current regulation is based. Since in this known device the automatic current control has to function over the entire range between the full power of the lamp and the minimum power, the effectiveness of the control remains relatively the same as the lamp current decreases, but in absolute terms it becomes less and less. Accordingly, when the lamp current is reduced to a critical value at the minimum lamp brightness, the current control becomes most unsafe. Therefore, the lamp current must not be reduced below 25-35% of the nominal current, which still results in a brightness of about 5% of that at nominal current (cf. column 3, lines 44-48).
  • the additional circuit arrangement has a reference voltage source and a voltage divider. has, the two ends of which are connected to oppositely polarized connections of the output of the rectifier arrangement on the one hand and the reference voltage source on the other, while the respective other connections of the output of the rectifier arrangement and the reference voltage source are connected to one another in such a way that the control voltage is tapped at a tap of said voltage divider and that through at least one electric valve the one polarity of the. Control voltage for the ignition angle control is switched off.
  • This configuration of the device according to the invention ensures that the control voltage, which is dependent on the lamp current, is effective for the ignition angle control only at relatively low values of the lamp current, but to a large extent.
  • the voltage divider in question forms a bridge arrangement which is fed on the one hand by the reference voltage source and on the other hand by the rectifier arrangement and in each case comes out of equilibrium if the influence of the output voltage of the rectifier arrangement which is dependent on the lamp current outweighs the influence of the reference voltage source in a positive or negative sense, the Control voltage for the ignition angle control arises.
  • the ignition angle is only influenced by the control voltage if the strength of the current flowing through the lamp drops below a predetermined value and the danger of an unwanted extinguishing of the gas discharge lamp only occurs in the first place.
  • the minimum current required for high pressure sodium lamps depends to a large extent on the temperature of the lamp.
  • the minimum current is relatively high at the normal operating temperature of the lamp and decreases with decreasing lamp temperature.
  • the lamp temperature drops only after a considerable time delay because of the thermal inertia of the lamp.
  • the specified minimum current strength should therefore be reduced with the same time delay. It is therefore a further object of the present invention to further develop the device according to the invention in such a way that the control voltage used to ensure the minimum current intensity depends not only on the intensity of the current flowing through the lamp but also indirectly on the respective temperature of the lamp.
  • the brightness of a high-pressure sodium lamp can be regulated in a hitherto unreached large range from full brightness at nominal power - down to less than 1% thereof, without the risk of the lamp being switched off unintentionally.
  • Fig. 1 20 denotes a mercury lamp, the brightness of which is to be regulated.
  • a throttle 21 in the usual way for limiting the current flowing through the lamp below a maximum value.
  • An electronic device 22 and a potentiometer R1 with two end connections 23, 24 and an adjustable tap 25 serve to regulate the brightness of the mercury vapor lamp 20.
  • the tap 25 By adjusting the tap 25, the brightness of the lamp 20 can be between a maximum value and a minimum value that is only about 3 % of the maximum value, arbitrarily regulate.
  • the electronic device 22 has two mains connection terminals 26, 27 for connection to an AC network with a voltage of e.g. 220 V, also two lamp connection terminals 28, 29 for connecting the mercury vapor lamp 20 and the choke 21, and three control line connection terminals 31, 32, 33 for connecting control conductors that lead to the connections 23, 24, 25 of the potentiometer R1.
  • the one mains connection terminal 26 and the one lamp connection terminal 28 are connected directly to one another.
  • a triac TR1, a high-frequency blocking inductor L1 and the primary winding L2 of a current transformer 30 are connected in series between the other mains connection terminal 27 and the second lamp connection terminal 29.
  • capacitors C1, C2 and the series connection of a capacitor C3 and a resistor R2 are provided.
  • the triac TR1 has a control electrode 34, which has to be supplied with an ignition pulse in each half-wave of the mains AC voltage in order to bring about the current flow.
  • the following circuit arrangement known per se is provided for generating the ignition pulses:
  • a commercially available integrated circuit IC1 e.g. the type TCA 280 A from Philips, is connected on the one hand with its connection 13 via a resistor R3 and a rectifier diode D1 to the mains connection terminal 26 and on the other hand with its connection 16 directly to the mains connection terminal 27 in order to be supplied with electrical energy from the AC network .
  • the ground conductor 35 of the circuit arrangement is also connected to the connection 16.
  • the integrated circuit IC1 provides a constant DC voltage which, for example, with respect to the ground conductor 35 Is + 14V.
  • a capacitor C4 located between the connection 11 and the ground conductor 35 smoothes the DC voltage.
  • the sawtooth voltage is synchronized with the half-waves of the AC line voltage in that a current path containing a resistor R6 is connected between the line terminal 26 and a trigger input 1 of the integrated circuit IC1.
  • a reverse voltage connection 3 of the integrated circuit IC1 is connected via a resistor R7 to the electrode 36 of the triac TR1 facing away from the ground conductor 35, as a result of which the start of the increase in the sawtooth voltage does not lie before the zero crossing of the current in the supply circuit of the mercury vapor lamp.
  • the control line connection 31 is connected by means of a conductor 37 to the connection 11 of the integrated circuit IC1 carrying the constant direct voltage, while the control line connection 32 is connected to the ground conductor 36, so that the constant direct voltage of e.g. 14V lies.
  • the control line connection 33 connected to the potentiometer tap 25 is connected via a resistor R8 and a conductor 38 to an ignition angle control input 5 of the integrated circuit IC1.
  • the level of the DC voltage at input 5 determines the ignition angle or ignition point within each AC voltage half-wave.
  • the ignition pulses appear at an output 10 of the integrated circuit IC1. This output 10 is connected to the control electrode 34 of the triac TR1 via a resistor R9.
  • Each ignition pulse begins when the instantaneous value of the sawtooth voltage at connection 6 matches the DC voltage at the ignition angle control input 5.
  • the duration of each ignition pulse is determined by a resistor-capacitor combination R10, R11, C6, which is connected to further connections 7, 8 and to the Ground conductor 35 is connected.
  • the potentiometer tap 25 is located directly at the end connection 23 of the potentiometer R1, the ignition angle is greatest and the brightness of the mercury vapor lamp 20 is lowest.
  • an additional circuit arrangement is provided in the device 22, which automatically ensures that the intensity of the current flowing through the mercury vapor lamp never falls below a certain minimum value. The additional circuit arrangement for minimum current isolation is described below.
  • the current transformer 30 has a secondary winding L3, which is loaded with a parallel resistor R13 and is connected to the input terminals 40, 41 of a rectifier arrangement 42.
  • the rectifier arrangement 42 has a positive output terminal 43 connected to the ground conductor 35 and a negative output terminal 44. Between the output terminals 43, 44, a Zener diode D2 for deriving overvoltages in the event of a short circuit in the supply circuit of the mercury lamp 20, a load resistor R14 and a capacitor C7 for smoothing the rectified voltage are connected in parallel.
  • the negative output terminal 44 of the rectifier arrangement 42 is connected via a voltage divider comprising a resistor R15, a potentiometer R16 and a further resistor R17 to the conductor 37, on which the constant DC voltage of, for example, + 14V is applied.
  • the potentiometer R16 has an adjustable tap 45, on which a control voltage U R which is dependent on the current strength in the supply circuit of the mercury vapor lamp is tapped. This control voltage U R is fed to the base of an npn transistor T1, the emitter of which is connected to the ground conductor 35 and the collector of which is connected via a resistor R12 to the conductor 38 leading to the ignition angle control input 5 of the integrated circuit IC1.
  • the collector-emitter path of the transistor T1 serves as a variable resistor, the resistance of which can be controlled electronically by the control voltage U at the base.
  • the resistors R8 and R12 and the collector-emitter path of the transistor T1 serving as a resistor together form a voltage divider, above which the DC control voltage U s , which is between the connections 32, 33 and is adjustable by means of the potentiometer R1.
  • the resistance value of the resistor R12 is much smaller than that of the resistor R8 and is practically negligible.
  • the voltage supplied to the ignition angle control input 5 of the integrated circuit IC1 by means of the conductor 38 is tapped off.
  • a diode D3 is connected between the base and the emitter of the transistor T1 and is poled in such a way that it prevents the occurrence of negative polarity voltages at the base of the transistor.
  • a resistor R 19 is connected between the reference voltage conductor 37 and the control voltage conductor 38.
  • Another resistor R20 and a charging capacitor C8 connected in parallel lie between the ground conductor 35 and the control voltage conductor 38.
  • An AC voltage is induced in the secondary winding L3 of the current transformer 30, which is proportional to the strength of the current flowing in the supply circuit of the mercury vapor lamp 20.
  • the induced AC voltage is rectified in the rectifier arrangement 42 and smoothed by the capacitor C7.
  • a direct voltage which is substantially proportional to the lamp current and is therefore negative across the capacitor C7 is negative with respect to the ground conductor 35.
  • This DC voltage is related to the constant positive DC voltage on the conductor 37 by means of the series connection of the resistor R15, the potentiometer R16 and the resistor R17.
  • the tap 45 of the potentiometer R16 can be adjusted so that for a given, relatively low strength of the in the supply circuit of the mercury vapor lamp 20 current flowing, the influences of the negative voltage on the output terminal 44 of the rectifier arrangement 42 on the one hand and the positive reference voltage on the conductor 37 on the other hand just cancel out on the potential at the tap 45.
  • the rectified voltage at the output terminal 44 of the rectifier arrangement 42 is more negative with respect to the ground conductor 35.
  • the negative potential at the output terminal 44 of the rectifier arrangement 42 with respect to the ground conductor decreases so far that at the tap 45 of the potentiometer R16 and at the base of the transistor T1 there is a positive potential with respect to the ground conductor 35.
  • the collector-emitter path of the transistor T1 is controlled in a conductive state. The result of this is that the voltage divider R8, R12, T1 takes effect and the DC voltage at point 39 becomes lower than the control DC voltage U S set at the potentiometer R1 at point 39.
  • the ignition angle also decreases accordingly, as a result of which the energy supply to the lamp 20 is increased and thereby a further decrease in the current intensity in the lamp supply circuit is counteracted.
  • the tap 45 of the potentiometer R16 is adjusted to match the individual properties of the lamp 20 to be controlled so that when the DC control voltage U s is increased to its maximum value, the current-dependent control voltage U R assumes a value which is sufficient to extinguish it to prevent the lamp 20 with certainty.
  • the minimum current intensity in the supply circuit of the lamp must be chosen as low as possible.
  • the control range of the automatic current-dependent ignition angle control is subject to certain limits. This is achieved through resistors R12, R19 and R20.
  • the automatic control described to ensure a given minimum current in the supply circuit of the mercury vapor lamp 20 also comes into effect if the current would drop below the permissible minimum value for reasons other than by adjusting the potentiometer R1, e.g. in the event of fluctuations in the AC mains voltage or in the event of brief voltage drops.
  • the capacitor C8 ensures that a cold start of the mercury vapor lamp 20 is also readily possible if the tap 25 of the potentiometer R1 is set to minimum lamp brightness, ie is located directly at the end connection 23 of the potentiometer. After connecting the mains connection terminals 26, 27 to the alternating current network, the capacitor C8 is charged only gradually, for example within 20 seconds, via the resistor R19. Since the voltage across capacitor C8 is initially zero and then rises slowly, the firing angle is initially zero, regardless of the setting of tap 25 of potentiometer R1.
  • the mercury vapor lamp 20 is thus supplied with the full current for a few seconds after it is switched on, so that the lamp quickly reaches its operating temperature, after which the current gradually levels itself out to the value determined by the DC control voltage U s or the control voltage U ⁇ .
  • each of these lamps is assigned its own device 22.
  • the DC control voltage 'U s can be generated for all these devices 22 by means of a single potentiometer R1, the end connection 24 and tap 25 with the control line connection terminals 32 and 33 of all devices 22 are connected.
  • a potentiometer R1 common to all devices 22, it is of course also possible to provide another source for the generation and delivery of the DC control voltage U s .
  • the second exemplary embodiment of the subject matter of the invention serves to regulate the brightness of a high-pressure sodium lamp, which in turn is designated by 20 in FIG. 2 and has assigned a current limiting choke 21.
  • 2 again shows an electronic device 22 and a potentiometer R1 with an adjustable tap 25 for arbitrarily changing the brightness of the lamp 20.
  • the difference from the exemplary embodiment described with reference to FIG. 1 lies only in the electronic device 22. Although this contains exactly the same and identically labeled circuit arrangements as in the case of the example according to FIG. 1, it also contains more the further circuit means and electronic components explained below.
  • Another voltage divider which is formed from two resistors R21 and R22.
  • the connection point 47 between the resistors R21 and R22 is connected to the base of a second transistor T2, the collector-emitter path of which is connected in parallel to that of the transistor T1.
  • a diode D4 which is poled in such a way that it prevents the occurrence of voltages of negative polarity at the base of the transistor T2.
  • the input 50, 51 of a second rectifier arrangement 52 is connected in parallel with the triac TR1 located in the supply circuit of the high-pressure sodium vapor lamp 20.
  • the positive output terminal 53 of the rectifier arrangement 52 is connected to the ground conductor 35 and the negative output terminal 54 to the one end of a voltage divider composed of two resistors R25 and R26.
  • the other end of the voltage divider R25, R26 is connected to the conductor 37, on which the constant DC voltage of e.g. + 14V is.
  • the connection point 55 between the two resistors R25 and R26 is connected to the base of the transistor T1 via a resistor R27 and a diode D5.
  • a smoothing capacitor C9 and a Zener diode D6 for deriving overvoltages are each connected between the connection point 55 and the ground conductor 35. If the rectifier arrangement 52 consists simply of a diode for one-way rectification, the input terminal 50 and the positive output terminal 53 as well as their connections to the ground conductor 35 are omitted in the diagram shown, since the ground conductor 35 itself then forms the relevant connection.
  • the mode of operation of the device according to FIG. 2 is basically the same as that described with reference to FIG. 1, insofar as the parts of the circuit arrangement are the same. Therefore, for the sake of simplicity, only the mode of operation of the additional circuit arrangements and electrical components compared to FIG. 1 is explained below.
  • the control voltage U R1 at the base of the transistor T1 is composed of two components, namely a first component, which is obtained by means of the current converter 30, the rectifier arrangement 42 and the voltage divider R15, R16, R17 in the manner already described and from which Strength of the current flowing through the high-pressure sodium vapor lamp is dependent, and a second component, which is obtained by means of the second rectifier arrangement 52 and the voltage divider R25, R26 and is dependent on the voltage lying above the triac TR1.
  • the control voltage U R2 at the base of the second transistor T2 is obtained exclusively by means of the current converter 30, the rectifier arrangement 42 and the voltage divider R21, R22 and is therefore solely dependent on the strength of the current flowing through the lamp 20.
  • the tap 45 of the potentiometer R16 is to be set such that when the DC control voltage U s is rapidly increased to its maximum value, the current-dependent component of the control voltage U R1 assumes a value which is sufficient to extinguish the sodium vapor Prevent high-pressure lamp 20 with certainty even if the lamp 20 has its normal operating temperature in accordance with the full power.
  • the latter gradually takes on a lower temperature, the voltage above the lamp 20 decreasing in parallel with the temperature reduction, in accordance with the special burning characteristic of a high-pressure sodium lamp .
  • the sum of the voltages across the lamp 20, the choke coils L1 and 21, the primary winding L2 of the current transformer 30 and the triac TR1 is always the same as the mains voltage at the terminals 26, 27. Since, with the help of the component of the control voltage U RI which is dependent on the current in the supply circuit of the lamp, the minimum current is kept practically constant, as explained above, the voltage across the choke coils L1 and 21 and across the primary winding L2 of the current transformer 30 remains practically constant.
  • the second transistor T2 and the control voltage U R2 obtained by means of the voltage divider R21, R22 is ensured. that the strength of the current flowing through the lamp still has a certain minimum value if the lamp has been controlled for its minimum brightness in the manner described above.
  • the two resistors R21 and R22 are dimensioned such that a voltage equilibrium then prevails at the tap 47, ie the potential with respect to the ground conductor 35 is equal to zero when the current in the supply circuit of the lamp 20 is just sufficient to reduce the lamp after it has been lowered their brightness to the minimum value with certainty to prevent them from completely extinguishing.
  • the mode of operation of the transistor T2 is otherwise analogous to the mode of operation of the transistor T1 as detailed above, depending on the strength of the current flowing through the lamp 20.
  • the resistors R12, R19 and R20 additionally limit the ignition angle adjustment range.
  • the automatic control described to ensure a given minimum current level in the supply circuit of the high-pressure sodium vapor lamp 20 also comes into effect when the current level would drop below the permissible minimum value for reasons other than by adjusting the potentiometer R1, e.g. in the event of fluctuations in the AC mains voltage or in the event of brief voltage drops.
  • the capacitor C8 ensures that a cold start of the high-pressure sodium lamp 20 is readily possible even if the tap 25 of the potentiometer R1 is set to minimum lamp brightness, i.e. is located directly at the end connection 23 of the potentiometer.
  • each of these lamps is assigned its own device 22.
  • the DC control voltage U s can be generated for all these devices 22 by means of a single potentiometer R1, the end connection 24 and tap 25 of which are connected to the control line connection terminals 32 and 33 of all devices 22.
  • a single potentiometer R1 the end connection 24 and tap 25 of which are connected to the control line connection terminals 32 and 33 of all devices 22.
  • another source for the generation and delivery of the control direct voltage U s can of course also be provided.
  • the described embodiments of the device according to the invention are e.g. Suitable for the brightness regulation of mercury vapor lamps or high pressure sodium vapor lamps in interior, roadway and tunnel lighting systems.
  • one or the other embodiment of the device described can also be used to regulate the brightness of other electric gas discharge lamps, depending on their burning characteristics.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Television Receiver Circuits (AREA)
EP79100202A 1978-02-11 1979-01-24 Elektronische Einrichtung zur Helligkeitsregulierung einer elektrischen Gasentladungslampe ohne Glühkathode Expired EP0003528B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH1488/78 1978-02-11
CH148878A CH627899A5 (en) 1978-02-11 1978-02-11 Electronic device for brightness control of a mercury-vapour lamp
CH3679/78 1978-04-06
CH367978A CH628766A5 (en) 1978-04-06 1978-04-06 Electronic device for brightness control of a sodium-vapour high-pressure lamp

Publications (2)

Publication Number Publication Date
EP0003528A1 EP0003528A1 (de) 1979-08-22
EP0003528B1 true EP0003528B1 (de) 1981-09-30

Family

ID=25687801

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79100202A Expired EP0003528B1 (de) 1978-02-11 1979-01-24 Elektronische Einrichtung zur Helligkeitsregulierung einer elektrischen Gasentladungslampe ohne Glühkathode

Country Status (9)

Country Link
US (1) US4320326A (enrdf_load_stackoverflow)
EP (1) EP0003528B1 (enrdf_load_stackoverflow)
JP (1) JPS55500308A (enrdf_load_stackoverflow)
CA (1) CA1112293A (enrdf_load_stackoverflow)
DE (1) DE2961104D1 (enrdf_load_stackoverflow)
DK (1) DK427379A (enrdf_load_stackoverflow)
FI (1) FI790394A7 (enrdf_load_stackoverflow)
NO (1) NO790422L (enrdf_load_stackoverflow)
WO (1) WO1979000615A1 (enrdf_load_stackoverflow)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2476410A1 (fr) * 1979-12-19 1981-08-21 Elam Ltd Circuit d'alimentation notamment d'une lampe a decharge
AU8929682A (en) * 1982-01-11 1983-07-21 Cornell-Dubilier Electronics Inc. Magnetic ballast with thyristor control
US4437043A (en) 1982-11-22 1984-03-13 Cornell-Dubilier Electric Corporation Lighting control for high intensity discharge lamp
WO1984004018A1 (en) * 1983-04-04 1984-10-11 Lawson Paul Mosteller Jr Device for automatic control of power to an electrical load and circuits therefor
DE3408426A1 (de) * 1984-03-08 1985-09-12 Philips Patentverwaltung Gmbh, 2000 Hamburg Schaltungsanordnung zum wechselstrombetrieb von hochdruck-gasentladungslampen
US5043635A (en) * 1989-12-12 1991-08-27 Talbott Edwin M Apparatus for controlling power to a load such as a fluorescent light
DE69106890T2 (de) * 1990-12-03 1995-06-08 Allied Signal Inc Steuerungsschaltung mit weitem einstellungsbereich für eine gasentladungslampe.
FI96472C (fi) * 1994-08-09 1996-06-25 Ahlstroem Oy Menetelmä valonhimmentimen toiminnan säätämiseksi ja valonhimmennin
US5850127A (en) * 1996-05-10 1998-12-15 Philips Electronics North America Corporation EBL having a feedback circuit and a method for ensuring low temperature lamp operation at low dimming levels
GB2319406A (en) * 1996-11-12 1998-05-20 Uvp Inc Dimming a medium pressure arc lamp; UV lamp standby mode
US7982405B2 (en) * 2005-03-22 2011-07-19 Lightech Electronic Industries Ltd. Igniter circuit for an HID lamp
CN102648663B (zh) * 2009-12-08 2016-04-06 皇家飞利浦电子股份有限公司 用于固态灯的驱动器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5028752A (enrdf_load_stackoverflow) * 1973-07-13 1975-03-24
US3991344A (en) * 1975-03-18 1976-11-09 Westinghouse Electric Corporation Solid-state dimmer for dual high pressure discharge lamps
US3989976A (en) * 1975-10-07 1976-11-02 Westinghouse Electric Corporation Solid-state hid lamp dimmer

Also Published As

Publication number Publication date
CA1112293A (en) 1981-11-10
NO790422L (no) 1979-08-14
EP0003528A1 (de) 1979-08-22
DK427379A (da) 1979-10-10
US4320326A (en) 1982-03-16
FI790394A7 (fi) 1979-08-12
WO1979000615A1 (en) 1979-09-06
DE2961104D1 (en) 1981-12-10
JPS55500308A (enrdf_load_stackoverflow) 1980-05-29

Similar Documents

Publication Publication Date Title
DE3407067C2 (de) Steuerschaltung für Gasentladungslampen
DE2903224C2 (de) Schaltungsanordnung zum Zünden und Speisen einer mit einer vorheizbaren Elektrode versehenen Metalldampfentladungslampe
DE2544364A1 (de) Netzteil
DE3903520A1 (de) Hochfrequenz-energieversorgungsschaltung fuer gasentladungslampen
EP0003528B1 (de) Elektronische Einrichtung zur Helligkeitsregulierung einer elektrischen Gasentladungslampe ohne Glühkathode
DE2936063A1 (de) Dimmerschaltkreis
DE3046617C2 (enrdf_load_stackoverflow)
DE69835328T2 (de) Steuerschaltung für eine Fluroreszenzlampe
DE3917062C2 (enrdf_load_stackoverflow)
DE3045798C2 (de) Stromversorgungseinrichtung
DE4122544C1 (enrdf_load_stackoverflow)
DE3204449C2 (enrdf_load_stackoverflow)
DE2929818A1 (de) Regelschaltung fuer ein netzgeraet
DE69008836T2 (de) Schaltungsanordnung, geeignet zum Zünden einer Hochdruckentladungslampe.
DE3622984C2 (enrdf_load_stackoverflow)
EP0588273A1 (de) Verfahren zum elektronischen Dimmen und Dimmer zur Durchführung des Verfahrens
DE19529333A1 (de) Selbsterregender Rücklaufkonverter und Verfahren zur Steuerung eines selbsterregenden Rücklaufkonverters
DE909012C (de) Selbsttaetige Elektrodenregelung fuer Lichtbogenoefen
EP0164774A1 (de) Schaltungsanordnung zur Regelung der Brennspannung von Hochdruckgasentladungslampen
DE3704511A1 (de) Zweidraht- wechselstrom- dimmer
DE1811526A1 (de) Regelschaltung fuer die Energieversorgung eines elektrischen Verbrauchers
DE1764593A1 (de) Regelschaltung fuer Leuchtstofflampen
EP0015304A1 (de) Verfahren und Vorrichtung zum Aufladen eines Kondensators
EP0055995A1 (de) Schaltungsanordnung zum Zünden und Betrieb einer Niederdruckentladungslampe aus einer Gleichstromquelle
CH628766A5 (en) Electronic device for brightness control of a sodium-vapour high-pressure lamp

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

Designated state(s): BE CH DE FR GB IT LU NL SE

17P Request for examination filed
ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE CH DE FR GB IT LU NL SE

REF Corresponds to:

Ref document number: 2961104

Country of ref document: DE

Date of ref document: 19811210

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

Ref country code: LU

Payment date: 19820113

Year of fee payment: 4

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

Ref country code: LU

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

Effective date: 19820131

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

Ref country code: CH

Payment date: 19830408

Year of fee payment: 5

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

Ref country code: SE

Payment date: 19830430

Year of fee payment: 5

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

Ref country code: BE

Payment date: 19830630

Year of fee payment: 5

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

Ref country code: SE

Effective date: 19840125

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

Ref country code: CH

Effective date: 19840131

Ref country code: BE

Effective date: 19840131

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

Ref country code: FR

Payment date: 19840730

Year of fee payment: 6

BERE Be: lapsed

Owner name: ELSTROM CONTROL SYSTEM A.G.

Effective date: 19840124

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: NL

Payment date: 19850131

Year of fee payment: 7

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

Ref country code: NL

Effective date: 19860801

GBPC Gb: european patent ceased through non-payment of renewal fee
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
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: 19860930

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: GB

Effective date: 19881117

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

Ref country code: DE

Payment date: 19920828

Year of fee payment: 14

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

Ref country code: DE

Effective date: 19931001

EUG Se: european patent has lapsed

Ref document number: 79100202.5

Effective date: 19850605

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