EP2285188A1 - Unit, system and method for adjusting and controlling the ignition and adjustment of a discharge lamp - Google Patents

Unit, system and method for adjusting and controlling the ignition and adjustment of a discharge lamp Download PDF

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Publication number
EP2285188A1
EP2285188A1 EP20100425213 EP10425213A EP2285188A1 EP 2285188 A1 EP2285188 A1 EP 2285188A1 EP 20100425213 EP20100425213 EP 20100425213 EP 10425213 A EP10425213 A EP 10425213A EP 2285188 A1 EP2285188 A1 EP 2285188A1
Authority
EP
European Patent Office
Prior art keywords
discharge lamp
adjustment
ignition
frequency
values
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.)
Ceased
Application number
EP20100425213
Other languages
German (de)
English (en)
French (fr)
Inventor
Eugenio Pignatelli
Giovanni Battista Pignatelli
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.)
Technolabs SpA
Original Assignee
Technolabs SpA
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 Technolabs SpA filed Critical Technolabs SpA
Publication of EP2285188A1 publication Critical patent/EP2285188A1/en
Ceased legal-status Critical Current

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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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H05B47/185—Controlling the light source by remote control via power line carrier transmission
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/21—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in parallel
    • H05B47/22—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in parallel with communication between the lamps and a central unit

Definitions

  • the present invention relates to a unit, system and method for adjusting and controlling the ignition and adjustment of a discharge lamp.
  • the invention concerns a unit and a method for adjustment of a discharge lamp supplied by a network, though which conveyed waves are transmitted, particularly studied and realised to permit high adjustment flexibility without generating noise through the supply network and in signals transmitted by the same.
  • highway lighting is designed in order to permit an optimum view under the worse conditions, i.e. when the traffic is utmost busy. Such a condition can only occur for a short time period during the highest peak of traffic.
  • control systems are spreading for reducing light intensity on the basis of the real needing.
  • many technologies are being developed and spread for remote controlling and analysing public lighting. Particularly, it is known "point to point" remote control, by which it is possible:
  • a further object of the present invention is that the above control filters noise generated and can realise a high number of adjustment levels.
  • an adjustment and control unit of a discharge lamp supplied by a power supply network characterized in that it comprises a power stage connected with said power supply line and with said discharge lamp, capable of supplying said discharge lamp, and processing means, connected with said power stage, said processing means being suitable to adjust the operation of said power stage by a control signal modulated in Pulse Frequency Modulation (PFM), so as to select a desired operating power level, that can be set beforehand, of said discharge lamp.
  • PFM Pulse Frequency Modulation
  • said unit can comprise a demodulator/modulator of conveyed waves connected with said power supply line and with said processing means, suitable to permit the reception and the transmission of data in conveyed waves transmitted on said power supply line, said data concerning the ignition and the operating of said discharge lamp.
  • said unit can comprise a filtering module, capable to select a band around an operating base frequency, so as to reduce the noise along said supply line) on which said conveyed waves are transmitted.
  • said filtering module can comprise functions for varying the frequency around a basic value for attenuating the noise re-injected on said power supply line by said pulse frequency modulated signal.
  • said power stage can comprise said filtering module, the latter preferably including an electromagnetic interference filter.
  • said power stage can comprises a rectifier, a radio-frequency calibrating module and an inverter block and resonant circuit connected with said adjustment and control unit and apt to be controlled by the same by means of said control signal.
  • control system for igniting and adjusting a plurality of discharge lamps, characterized in that it comprises an adjustment and control unit, as defined in the above, connected with each one of said discharge lamps, a remote central unit provided with main data transceiving means, preferably in GPRS/UMTS, capable of transmit ranges of ignition and work values of said discharge lamp, at least one concentrator, connected with said power supply line, and comprising further data transceiving means, preferably in GPRS/UMTS mode for connection with said remote central unit, and a modulator/demodulator for conveyed waves, for transmitting and receiving data to/from said adjustment and control units, for controlling said lamps connected with them on the basis of said ranges of ignition and work values received from said remote central unit.
  • an ignition and adjustment method of a discharge lamp supplied by a power supply network and connected with an adjustment and control unit for operation of a plurality of operating power levels set beforehand, said method comprising: a setting step, wherein, for each one of said one or more operating parameters of said discharge lamp, said adjustment and control unit acquires a range of ignition values that can be programmed, for regulating the power supply at one of said operating power levels set beforehand; a step of actuation of said discharge lamp, wherein said adjustment and control unit brings the value of each one of said operating parameters at the respective range of ignition values acquired during said setting step, for allowing the passage of said discharge lamp to a warm up mode; an operative step, wherein said adjustment and control unit acquires a range of working values set beforehand for each one of said one or more operative parameters, and sets each one of said operative parameters at the respective range of working values, for allowing the passage of said discharge lamp to a state corresponding to one of said operating power levels set beforehand.
  • said setting step can further comprise the following steps:
  • step of actuation can further comprise the following steps:
  • said operative step can comprise the following further steps:
  • said method can comprise, after said operative step, a step of detection of said values of said parameters, and a step of calculation of a power factor by said values of said parameters.
  • said parameters can comprise the supply voltage (Vlamp) across the terminals of said discharge lamp and/or the supply current frequency (Flamp) of said discharge lamp and/or the frequency of the wave of said control signal pulse frequency modulated, the supply current of said discharge lamp and/or the power factor and/or the temperature of the discharge lamp.
  • FIG. 1 it is observed an adjustment and control system 1 of an electric supply network or line 2. Particularly, it is observed a concentrator 3 connected to said electric supply line and a remote central unit 4 connected with said concentrator 3.
  • a plurality of discharge lamps 5 is connected to said electric supply line 2.
  • An adjustment and control unit is interposed between said electric line 2 and each discharge lamp 5, suitable to control operation of the discharge lamp 5, as will be better described in the following.
  • PLC Power Line Communication - conveyed waves system. Conveyed waves modulated signal is transmitted along said electric supply line 2.
  • said concentrator 3 and said adjustment and control unit 6 can communicate by both Cenelec A and C bands, according to the needing.
  • said concentrator 3 and said adjustment and control units 6 communicate through the band A; while in the industrial, civil or commercial applications, they communicate through band C.
  • Each adjustment and control unit 6, is particularly seen as a knot of the electric supply line 2.
  • Concentrator 3 can control adjustment and control units 6, which control ignition of discharge lamp 5, adjusting its intensity by a modulated control signal according to a PFM (Pulse Frequency Modulation) pulse frequency modulation. Said concentrator 3 configures each adjustment and control unit 6, transmitting value of adjustment parameters for ignition and adjustment of light intensity. Furthermore, each one of said adjustment and control units 6 can detect each failure of the relevant discharge lamp 5, communicating the same to said concentrator 3, always by a conveyed wave signal. Then, said concentrator 3 can transmit said information to said remote central unit 4. Said remote central unit 4 and said concentrator 3 are connected by suitable transceiving means, for example of the GSM/GPRS type.
  • discharge lamps 5 are f the High Pressure Sodium (HPS) type or of the metal Halide (MH) type, with a supply power usually between 70 and 100 Watts or between 150 and 250 Watts, as well as of the halogen type.
  • Supply tension can reach 4.5 Volts and operation frequency can be higher than 37 kHz.
  • their ignition must be suitable carried out so as to limit wear of the same discharge lamp 5.
  • Said conveyed wave modulator/demodulator 7 is connected with electric supply line 2 by a coupling circuit 7' and an amplifier 7". Further, said adjustment and control unit 6 also comprises a microprocessor 8, connected with said modulator/demodulator 7 and with a temperature sensor 8' and an EEPROM memory 8".
  • Said adjustment and control unit 6 also comprises a power unit 9, including, in the present embodiment, a filtering module 91, the function of which will be better described in the following, a rectifier 92, a radiofrequency calibration module 93 and an inverter and resonant circuit block 94.
  • Said adjustment and control unit 6 is completed by a timer 10 and a power unit 11 for supplying different circuits.
  • Said microprocessor 8 following information about parameters for ignition and adjustment of said discharge lamp 5, generates a PFM (Pulse Frequency Modulation) pulse frequency modulated control signal, piloting, i.e. adjusting, said inverter and resonant circuit block 94, varying operation frequency of discharge lamp 5 and consequently light emission.
  • PFM Pulse Frequency Modulation
  • Pulse frequency modulation control and duty cycle fixed at 50% reduces generated noise with respect to known controls.
  • switching modulation frequency modulation too can cause noise which, by a function carried out by filtering module 91, makes a selection of a suitable band bout an operative base signal frequency, reducing noise effects on communication performances along conveyed waves.
  • Filtering module 91 comprises common mode and differential mode filters to attenuate noise readmitted along electric line 2 by said frequency modulation signal, thus reducing harmonics caused by power stage.
  • Said microprocessor 8 can switch on and adjust said discharge lamp 5 by a specific procedure, so as not to disturb conveyed waves along said electric supply line 2.
  • Figures 4a, 4b and 4c show the above procedure. From figure 4a , it is observed discharge lamp 5 in a switched off mode, during which it remains for a first cooling time interval Dt1, to pass then to a waiting mode.
  • adjustment and control unit 6 can receive a pre-progammable ignition value range for one or more operative parameters of the discharge lamp 5. Said operation parameters are transmitted from said concentrator 3 and can be set by a remote central unit 4.
  • each one of said working interval assembly of the operative parameters of said discharge lamps 5 corresponds to one of the pre-set levels of the operation power, so that said halogen lamp 5 can work at a minimum value, even of 30% of nominal power, thus permitting an even precise adjustment, e.g. of five lighting levels.
  • PFM pulse frequency modulation
  • said operative step it is also controlled if supply tension of said discharge lamp 5 Vlamp is higher or equal to a supply tension maximum threshold of the same Max_WarmUp_Vlamp under a quick warming condition. If said condition is not satisfied, discharge lamp 5 is brought back to the quick warm-up state; otherwise, said discharge lamp 5 is in the wished lighting condition or state, i.e. at one of the operation power levels, during which all operation parameters are monitored and power factor is calculated in real time by said microprocessor.
  • operation parameters of said discharge lamp 5 can comprise Vlamp at the ends of said discharge lamp 5 and/or frequency of Flamp current of said discharge lamp 5 and/or frequency of said pulse amplitude modulated control signal, supply current of said discharge lamp 5, power factor, discharge lamp 5 temperature.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Arc Welding Control (AREA)
EP20100425213 2009-07-14 2010-06-24 Unit, system and method for adjusting and controlling the ignition and adjustment of a discharge lamp Ceased EP2285188A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITRM2009A000362A IT1394776B1 (it) 2009-07-14 2009-07-14 Unita', sistema e metodo di regolazione e controllo per l accensione e la regolazione di lampade a scarica.

Publications (1)

Publication Number Publication Date
EP2285188A1 true EP2285188A1 (en) 2011-02-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100425213 Ceased EP2285188A1 (en) 2009-07-14 2010-06-24 Unit, system and method for adjusting and controlling the ignition and adjustment of a discharge lamp

Country Status (2)

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EP (1) EP2285188A1 (it)
IT (1) IT1394776B1 (it)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1385359A1 (en) * 2002-07-22 2004-01-28 Dmitri Koroliouk Remote controlled electronic ballast for high pressure gas discharge lamps via power line carrier
WO2005043955A2 (en) * 2003-10-30 2005-05-12 I.E.P.C. Corp. Electronic lighting ballast
US20050156534A1 (en) * 2004-01-15 2005-07-21 In-Hwan Oh Full digital dimming ballast for a fluorescent lamp
WO2007050047A1 (en) * 2005-08-16 2007-05-03 Argent Electric Electronic ballast with closed loop control using composite current and voltage feedback and method thereof
WO2007106538A2 (en) * 2006-03-14 2007-09-20 Energy Conservation Technologies, Inc. Improved single stage power factor corrected power converter with reduced ac inrush

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1385359A1 (en) * 2002-07-22 2004-01-28 Dmitri Koroliouk Remote controlled electronic ballast for high pressure gas discharge lamps via power line carrier
WO2005043955A2 (en) * 2003-10-30 2005-05-12 I.E.P.C. Corp. Electronic lighting ballast
US20050156534A1 (en) * 2004-01-15 2005-07-21 In-Hwan Oh Full digital dimming ballast for a fluorescent lamp
WO2007050047A1 (en) * 2005-08-16 2007-05-03 Argent Electric Electronic ballast with closed loop control using composite current and voltage feedback and method thereof
WO2007106538A2 (en) * 2006-03-14 2007-09-20 Energy Conservation Technologies, Inc. Improved single stage power factor corrected power converter with reduced ac inrush

Also Published As

Publication number Publication date
IT1394776B1 (it) 2012-07-13
ITRM20090362A1 (it) 2011-01-15

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