EP1003355A1 - Circuit d'amor age booster pour lampe à décharge - Google Patents

Circuit d'amor age booster pour lampe à décharge Download PDF

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Publication number
EP1003355A1
EP1003355A1 EP98830678A EP98830678A EP1003355A1 EP 1003355 A1 EP1003355 A1 EP 1003355A1 EP 98830678 A EP98830678 A EP 98830678A EP 98830678 A EP98830678 A EP 98830678A EP 1003355 A1 EP1003355 A1 EP 1003355A1
Authority
EP
European Patent Office
Prior art keywords
booster
section
resistor
tube
diodes
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.)
Withdrawn
Application number
EP98830678A
Other languages
German (de)
English (en)
Inventor
Yousef Husni Barikhan
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP98830678A priority Critical patent/EP1003355A1/fr
Publication of EP1003355A1 publication Critical patent/EP1003355A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies

Definitions

  • the present invention relates to a starting device for inert gas-filled tubes, lamps and the like.
  • the first one of these power supplies is a conventional transformer with a large number of turns. This accordingly entails weight problems, caused mostly by the laminated core, and insulation problems, owing to the large number of turns, in addition to dissipation and cost problems.
  • the second known solution uses elements which raise the mains frequency from 50 Hz to tens of kHz or more. This entails particular precautions and connections, radio-frequency noise, and insulation.
  • a third solution provides for a device which comprises at least one first and second section for rectifying/boosting the AC mains voltage, suitable to rectify the AC voltage and boost it; the sum of the output voltages of the first section and of the second section is used to supply the inert gas-filled tube or tubes.
  • the aim of the present invention is to provide a starting device for inert gas-filled tubes and the like which allows to have a sufficiently high power factor.
  • an object of the present invention is to provide a starting device for inert gas-filled tubes and the like which reduces the insulation, bulk and weight problems of known solutions.
  • Another object of the present invention is to provide a starting device for inert gas-filled tubes and the like whose modularity characteristics allow the series or parallel connection of a plurality of similar devices.
  • Another object of the present invention is to provide a starting device for inert gas-filled tubes and the like which provides optimum operation also in the presence of supply voltage drops.
  • Another object of the present invention is to provide a starting device for inert gas-filled tubes and the like which is highly reliable, relatively easy to manufacture and at competitive costs.
  • a starting device for inert gas-filled tubes and the like comprising at least one first section and one second section for boosting the mains AC supply voltage, whose output is connected to at least one inert gas-filled tube to be supplied, characterized in that it comprises voltage rectifier means which are arranged between the supply mains and said first and second booster sections and are connected to the terminals of said at least one tube to be supplied, means for insulating the first and second booster sections after the tube has been started being provided in order to allow a high power factor of the device.
  • the device according to the present invention comprises rectifier means 4 which are connected to at least one first booster section and to at least one second booster section, designated by the reference numerals 2 and 3 respectively.
  • Each one of the first and second booster sections 2 and 3 is suitable to boost the output voltage of the rectifier means 4 so as to have a DC voltage whose value is equal to the one that is present in the other section and has the opposite sign. Accordingly the output nodes of the two sections 2 and 3 have two identical and opposite voltage values, respectively.
  • the supply voltage fed to the terminals A and B of the device according to the invention thus rectified and boosted and given by the sum of the voltage values present at the output nodes of the two sections 2 and 3, supplies at least one inert gas-filled tube 6 or a plurality of inert gas-filled tubes 6.
  • Each booster section 2 and 3 is composed of a plurality n of booster stages formed by diodes 7 and capacitors 8-13 for the section 2 and capacitors 14-19 for the section 3.
  • the number of booster stages can be chosen according to the voltage level to be obtained in output. Accordingly, the number of stages shown in Figure 1 is merely an example, since it must be related to the length of the inert gas-filled tube to be supplied.
  • Resistors 20 are arranged in parallel to each one of the capacitors 8-13 in the section 2.
  • the rectifier means 4 are conveniently constituted by a rectifier bridge which is formed by four diodes and is provided with a first resistor 21 to protect the capacitors of the booster sections 2 and 3.
  • a second resistor 22 is arranged between the input terminal A of the device according to the invention and a terminal of the rectifier bridge 4, while a fusible element 23 is arranged between the input terminal B of the device according to the invention and the terminal of the rectifier bridge 4 that is opposite with respect to the terminal to which the resistor 22 is connected.
  • a third resistor 24 is connected between the output of the second booster section 3 and the tube or lamp 6 which must be started by the device according to the invention.
  • the capacitors 8-13 of the first booster section 2 have high values in order to allow starting of the tube or lamp 6, while the capacitors 14-19 of the second booster section 3 have very low values.
  • the resistor 24 is used to insulate the lamp or tube 6 with respect to the booster section 3 when the lamp or tube is on.
  • a plurality of diodes D1-D2...Dn are provided between the positive terminal of the rectifier bridge 4 and the resistor 24 in order to insulate the rectifier bridge 4 from the starting voltage of the booster sections 2 and 3 toward the resistor 24.
  • the resistors R are arranged in parallel to the diodes D1-D2...Dn.
  • the negative terminal of the rectifier bridge 4 closes the circuit on the lamps or tubes 6.
  • the sum of the voltages generated by the booster sections 2 and 3 allows to provide the starting voltage of the tube or tubes 6 and then, with the section 2 alone, also the initial energy required to maintain stable operation.
  • Figure 2 is a circuit diagram which shows, in dashed lines, additional elements with respect to those provided in Figure 1, which accordingly constitute additional embodiments of the circuit according to the invention.
  • a fourth resistor 25 can be connected directly between the input terminal A of the circuit and the first booster section 2 and is meant to insulate the booster, minimizing its transfer of power to the lamps or tubes 6, in order to allow a high overall power factor of the power supply.
  • Another embodiment of the circuit according to the invention provides for a sixth resistor 27 which is connected between the resistor 26 and the diodes D1...Dn.
  • the resistors 22 and 27 adjust the current in the tube or tubes optionally arranged in series.
  • the circuit thus conceived allows, in the steady state, after the tubes have been started, by insulating the booster section with a highly reactive impedance, to provide high power factor values (for example higher than 0.8).
  • the insulation of the booster (booster sections 2 and 3) in the steady state by means of the resistors 25 and 26, with a consequent low transfer of energy to the started lamps or tubes, also allows, by means of an appropriate selection of the dimensions of the resistor 26, to limit the discharge of the cells of the booster, avoiding the introduction of flicker in the light delivered by the lamp. This occurs also at low mains voltages, when the voltage delivered by the first booster section 2 prevails over the voltage delivered by the bridge 4.
  • the resistors 22 and 24 are the only power-dissipating elements of the system and the current required by the lamp or tubes 6 is adjusted, in the steady state, predominantly by the value of said resistors.
  • the tubes or lamps connected in series are thus supplied with a DC voltage with a residue of AC voltage, and this reduces the strobe effect, as mentioned.

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  • Circuit Arrangements For Discharge Lamps (AREA)
EP98830678A 1998-11-10 1998-11-10 Circuit d'amor age booster pour lampe à décharge Withdrawn EP1003355A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98830678A EP1003355A1 (fr) 1998-11-10 1998-11-10 Circuit d'amor age booster pour lampe à décharge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98830678A EP1003355A1 (fr) 1998-11-10 1998-11-10 Circuit d'amor age booster pour lampe à décharge

Publications (1)

Publication Number Publication Date
EP1003355A1 true EP1003355A1 (fr) 2000-05-24

Family

ID=8236879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98830678A Withdrawn EP1003355A1 (fr) 1998-11-10 1998-11-10 Circuit d'amor age booster pour lampe à décharge

Country Status (1)

Country Link
EP (1) EP1003355A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002063931A1 (fr) * 2001-02-05 2002-08-15 Mitar Boroja Cascade universelle de courant de haute intensite et de haute tension, type-2001

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995002311A1 (fr) * 1993-07-06 1995-01-19 Kadesum Limited Lampe fluorescente non stroboscopique a economie d'energie
CN1110464A (zh) * 1994-03-11 1995-10-18 姜育宏 气体放电光源电子启动器
US5856916A (en) * 1994-04-29 1999-01-05 Bonnet; Andre Assembly set including a static converter with controlled switch and control circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995002311A1 (fr) * 1993-07-06 1995-01-19 Kadesum Limited Lampe fluorescente non stroboscopique a economie d'energie
CN1110464A (zh) * 1994-03-11 1995-10-18 姜育宏 气体放电光源电子启动器
US5856916A (en) * 1994-04-29 1999-01-05 Bonnet; Andre Assembly set including a static converter with controlled switch and control circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002063931A1 (fr) * 2001-02-05 2002-08-15 Mitar Boroja Cascade universelle de courant de haute intensite et de haute tension, type-2001

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