WO2009109326A1 - Circuit for heating and monitoring the hot coils of at least one gas discharge lamp operated by an evg and lighting system - Google Patents
Circuit for heating and monitoring the hot coils of at least one gas discharge lamp operated by an evg and lighting system Download PDFInfo
- Publication number
- WO2009109326A1 WO2009109326A1 PCT/EP2009/001376 EP2009001376W WO2009109326A1 WO 2009109326 A1 WO2009109326 A1 WO 2009109326A1 EP 2009001376 W EP2009001376 W EP 2009001376W WO 2009109326 A1 WO2009109326 A1 WO 2009109326A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heating
- circuit
- voltage
- wbi
- gas discharge
- Prior art date
Links
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
- H05B41/26—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
- H05B41/295—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 and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
- H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
- H05B41/2985—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions
-
- 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
- H05B41/295—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 and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
-
- 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
Definitions
- the invention relates to a circuit for heating and monitoring the heating coils of a gas discharge lamp operated with an electronic ballast and to a lighting system with an operating device having such a circuit.
- the invention further relates to a heating circuit for at least one operated with an electronic ballast gas discharge lamp.
- the heating circuit is the subject of independent claim 7 and further developed by the features of the claims dependent on claim 7.
- the invention also relates to a control device for gas discharge lamps, comprising a circuit of the type mentioned above.
- the invention relates to a luminaire, comprising such an operating device and at least one gas discharge lamp.
- the invention also relates to a lighting system comprising one or more such Luminaires, which are preferably connected to one another via a bus and / or with a central control unit.
- the lighting system can also have other light sources, such as HID lamps, LEDs or OLEDs.
- Fig. 1 is a schematic block diagram of the electronic ballast used for
- Fig. 2 shows a heating circuit for two gas discharge lamps.
- the ballast V shown in Fig. 1 is used to operate two gas discharge lamps Ll, L2, each with two heating coils WIa, WIb, W2a, W2b.
- L2 is rectified by a rectifier 1, the mains voltage and smoothed in a smoothing circuit.
- An inverter 3 generates an alternating voltage which is fed to a series resonant circuit 4.
- the voltage drop across the capacitor of the series resonant circuit 4 is supplied to the lamps L1, L2 as the operating voltage.
- a programmer 14 connected to a bus determines the start of a preheat phase for the lamps L1, L2. He gives to the block 8 a start signal.
- the block 8 generates the heating power or the filament current for the filaments Wl and W2 of the lamp L.
- the heating power or the filament current become constant during the preheating phase held.
- the heating power or the filament current are led to the lamp L1, L2 via a block 6, which contains means for limiting the filament voltage.
- a limitation of the filament voltage is required to avoid, for example, a transverse discharge between the individual sections of the heating coils.
- the filament current flowing through the "cold" coils WIb, W2b generates a voltage drop across the common resistor R5, which is conducted to the filament current measuring means 7.
- At two voltage dividers R1 / R2 and R3 / R4 are further
- Tensions removed which is a measure of the helical voltage at the respective "cold" helix WIb, W2b. This is fed to the helical voltage measuring means 9.
- the measurement values continuously measured by the filament current measuring means 7 and the filament voltage measuring means 9 are fed to a memory 15.
- the memory 15 is controlled by the programmer 14 such that the measured values for the filament current and the filament voltage are stored at two successive times during the preheating phase.
- the stored measured values for the filament current and the filament voltage are fed from the memory 15 from a quotient generator 10, which calculates therefrom the cold resistances and the hot resistances of the filaments WIB, W2b. These values are forwarded by the quotient generator 10 to the difference value generator 11, which calculates the difference resistances from them.
- the difference value generator 11 supplies the difference resistances to a decision logic 13, which in turn corresponds to a memory 12 by storing a table for reference difference resistances.
- the Decision logic 13 compares the differential resistances calculated in block 11 with the reference values in the table stored in memory 12 and determines the type of lamps L1, L2 operated by the ballast V. The determined lamp types are transferred from the decision logic 13 to the
- Operating parameter setting 5 reported, among other things, among other parameters, the heating current or the heating power reset if the lamp Ll, L2 of a different type than the previously operated with the ballast V lamps. Further operating parameters may be the preheating time, the ignition voltage, the lamp burning voltage, the lamp current or else parameters for fault shutdowns. However, it is also possible to set operating parameters for the power factor correction circuit, such as, for example, the bus voltage or the dynamics of the control loop.
- Fig. 1 need not necessarily be realized by hardware. Rather, it is also possible that the function of some blocks is realized by a corresponding software in a processor.
- the block diagram in Fig. 1 is intended only for better understanding.
- the heating circuit shown in Fig. 2 has been specially designed for operation with two gas discharge lamps L1, L2. It corresponds approximately to the block 8 in FIG. 1.
- This is a heating circuit which - starting from a DC supply voltage (eg Vbus) by means of a DC-DC converter, the filaments of a gas discharge lamp Preheated, wherein based on the heating parameters of the lamp type or certain operating parameters can be determined.
- the circuit operates with a flyback converter, consisting of the primary winding Tl of a heating transformer T, a clocked switch S and a resistor R4. These three elements are connected in series.
- the "hot" end of the primary winding Tl is located on a bus provided by a bus voltage U B us / during the cold end of the resistor R4 is grounded.
- the switch S is clocked by a control circuit H.
- the latter corresponds to a microprocessor P.
- the microprocessor P receives control commands from a bus.
- the heating transformer T has three secondary windings T2, T3 and T4. Each of the secondary windings is with a
- Rectifier circuit for the secondary winding T2 consists of a diode Bl and a capacitor Cl.
- Rectifier circuit for the secondary winding T3 consists of a diode D3 and a capacitor C3.
- Rectifier circuit for the secondary winding T4 consists of a diode D4 and a capacitor C4.
- the flyback converter generates from the DC voltage supplied by the bus an AC voltage which is rectified by the rectifier circuits mentioned.
- the capacitors Cl, C3 and C4 serve to smooth the pulsating DC voltage generated thereby.
- the level of the DC voltage can be influenced by varying the clock ratio and / or the clock frequency of the switch.
- the DC voltages decoupled from the rectifier circuits at the secondary windings T3 and T4 serve to heat the "hot" coils WIa and W2a of the two lamps L1 and L2.
- the "cold" coils WIb and W2b are fed together by the secondary winding T2.
- a further rectifier circuit is connected in parallel, which consists of a diode D2 and a capacitor C2.
- the one voltage divider consists of the resistors Rl and R2.
- the second voltage divider consists of the resistors R4 and R5. From the nodes of the two voltage divider measuring signals are coupled and the control circuit H supplied.
- the measurement signals are a measure of the filament voltage at the two "cold" coils WIb and W2b.
- the currents through the two latter coils flow together via a measuring resistor R3. They cause at this a voltage drop, which is forwarded as a measurement signal to the microprocessor P and is a measure of the total current.
- resistors R4 and R5 behind the measuring resistor R3, as indicated in dashed lines.
- the resistors are here designated R4 'and R5'.
- the control circuit H and the microprocessor P together form the measuring signals for the filament voltages and the measuring signal for the total current, the filament resistor.
- the helical resistance at the beginning of a Pre-heating phase is stored as cold resistance.
- the filament resistance after a certain time within the preheat phase is stored as a hot resistor. From the hot resistance and the cold resistance, the resistance difference is formed and compared with values of a reference table to determine the type of the two lamps L1 and L2.
- Dielectric strength can be made, without detriment to possible measurements and thus obtained
- a helical break can be determined as follows. Suppose that the helix WIb is broken. If the converter is switched on and then switched off again, and after switching off the transformer voltages are measured, the following is shown.
- the voltage at the voltage divider R1 / R2 remains long because there is a time constant resulting from the product of (R 1 + R 2) x Cl.
- the voltage at the voltage divider R4 / R5 decays quickly because the time constant Rhot x C2 applies here. Rhot is much larger than (Rl + R2).
- the helical resistance of the non-broken heating coil is reduced by half by the formation of the coil resistance by means of the formation of quotients, as shown in FIG the same current flows. In general, this also applies to more than two heating coils monitored for spiral breakage. In this case, a corresponding proportionate reduction of the filament resistances of the non-broken monitored heating coils takes place.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09717176A EP2248396A1 (en) | 2008-03-04 | 2009-02-26 | Circuit for heating and monitoring the hot coils of at least one gas discharge lamp operated by an evg and lighting system |
DE112009000362T DE112009000362A5 (en) | 2008-03-04 | 2009-02-26 | Circuit for heating and monitoring the heating coils of at least one gas discharge lamp operated with an electronic ballast and illumination system |
CN200980107863.6A CN101965755B (en) | 2008-03-04 | 2009-02-26 | Circuit for heating and monitoring the hot coils of at least one gas discharge lamp operated by an evg and lighting system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810012452 DE102008012452A1 (en) | 2008-03-04 | 2008-03-04 | Circuit for heating and monitoring the heating coils of at least one operated with an electronic ballast gas discharge lamp on spiral breakage |
DE102008012452.4 | 2008-03-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009109326A1 true WO2009109326A1 (en) | 2009-09-11 |
Family
ID=40638169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/001376 WO2009109326A1 (en) | 2008-03-04 | 2009-02-26 | Circuit for heating and monitoring the hot coils of at least one gas discharge lamp operated by an evg and lighting system |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2248396A1 (en) |
CN (1) | CN101965755B (en) |
DE (2) | DE102008012452A1 (en) |
WO (1) | WO2009109326A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012083327A3 (en) * | 2010-12-23 | 2012-09-07 | Tridonic Gmbh & Co. Kg | Controlled coil heating for gas-discharge lamps |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2757224C (en) * | 2009-03-27 | 2016-12-06 | Eidgenoessische Technische Hochschule Zuerich | Salmonella enterica presenting c. jejuni n-glycan or derivatives thereof |
CA2857535A1 (en) * | 2011-12-05 | 2013-06-13 | Gang Yao | Step-dimming solution for lamp ballast |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1359791A1 (en) * | 2002-04-30 | 2003-11-05 | Teknoware Oy | Ballast circuit for parallel-connected fluorescent tubes |
US20040113566A1 (en) * | 2002-12-13 | 2004-06-17 | Bruce Industries, Inc. | Sensing voltage for fluorescent lamp protection |
EP1519638A1 (en) * | 2003-09-29 | 2005-03-30 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Method for operating a low pressure discharge lamp |
DE202005013753U1 (en) * | 2005-08-31 | 2005-11-17 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Electronic ballast for operating discharge lamp, has control device to ignite lamp discharging in non-repetitive process for parameter e.g. voltage, that is correlated to temperature of electrodes during measurement of parameter |
WO2007119189A1 (en) * | 2006-04-19 | 2007-10-25 | Koninklijke Philips Electronics N.V. | A circuit for detecting function status of a lamp and a ballast |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19923945A1 (en) * | 1999-05-25 | 2000-12-28 | Tridonic Bauelemente | Electronic ballast for at least one low-pressure discharge lamp |
US7589472B2 (en) * | 2003-12-11 | 2009-09-15 | Koninklijke Philips Electronics N.V. | Electronic ballast with lamp type determination |
DE102005018761A1 (en) * | 2005-04-22 | 2006-10-26 | Tridonicatco Gmbh & Co. Kg | Intelligent flyback heater |
-
2008
- 2008-03-04 DE DE200810012452 patent/DE102008012452A1/en not_active Withdrawn
-
2009
- 2009-02-26 CN CN200980107863.6A patent/CN101965755B/en not_active Expired - Fee Related
- 2009-02-26 EP EP09717176A patent/EP2248396A1/en not_active Withdrawn
- 2009-02-26 WO PCT/EP2009/001376 patent/WO2009109326A1/en active Application Filing
- 2009-02-26 DE DE112009000362T patent/DE112009000362A5/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1359791A1 (en) * | 2002-04-30 | 2003-11-05 | Teknoware Oy | Ballast circuit for parallel-connected fluorescent tubes |
US20040113566A1 (en) * | 2002-12-13 | 2004-06-17 | Bruce Industries, Inc. | Sensing voltage for fluorescent lamp protection |
EP1519638A1 (en) * | 2003-09-29 | 2005-03-30 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Method for operating a low pressure discharge lamp |
DE202005013753U1 (en) * | 2005-08-31 | 2005-11-17 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Electronic ballast for operating discharge lamp, has control device to ignite lamp discharging in non-repetitive process for parameter e.g. voltage, that is correlated to temperature of electrodes during measurement of parameter |
WO2007119189A1 (en) * | 2006-04-19 | 2007-10-25 | Koninklijke Philips Electronics N.V. | A circuit for detecting function status of a lamp and a ballast |
Non-Patent Citations (2)
Title |
---|
ATMEL CORPORATION: "Analog-to-Digital Conversion Utilizing the AT89CX051 Microcontrollers", December 1997 (1997-12-01), XP002530930, Retrieved from the Internet <URL:http://www.atmel.com/dyn/resources/prod_documents/DOC0524.PDF> [retrieved on 20090605] * |
See also references of EP2248396A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012083327A3 (en) * | 2010-12-23 | 2012-09-07 | Tridonic Gmbh & Co. Kg | Controlled coil heating for gas-discharge lamps |
Also Published As
Publication number | Publication date |
---|---|
EP2248396A1 (en) | 2010-11-10 |
CN101965755A (en) | 2011-02-02 |
DE112009000362A5 (en) | 2011-01-13 |
CN101965755B (en) | 2014-07-23 |
DE102008012452A1 (en) | 2009-09-10 |
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