EP2248393A1 - Vorrichtung und verfahren zur erzeugung einer zündspannung für eine lampe - Google Patents
Vorrichtung und verfahren zur erzeugung einer zündspannung für eine lampeInfo
- Publication number
- EP2248393A1 EP2248393A1 EP08709193A EP08709193A EP2248393A1 EP 2248393 A1 EP2248393 A1 EP 2248393A1 EP 08709193 A EP08709193 A EP 08709193A EP 08709193 A EP08709193 A EP 08709193A EP 2248393 A1 EP2248393 A1 EP 2248393A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lamp
- resonant circuit
- switch
- voltage
- circuit
- 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.)
- Granted
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
- H05B41/288—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 without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
- H05B41/2881—Load circuits; Control thereof
- H05B41/2882—Load circuits; Control thereof the control resulting from an action on the static converter
- H05B41/2883—Load circuits; Control thereof the control resulting from an action on the static converter the controlled element being a DC/AC converter in the final stage, e.g. by harmonic mode starting
-
- 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
- H05B41/02—Details
- H05B41/04—Starting switches
- H05B41/042—Starting switches using semiconductor devices
Definitions
- the invention relates to a device and a method for generating a starting voltage for a lamp.
- High intensity discharge lamps are known, e.g. HE-HCI lamps or MF-HCI lamps, which are usually operated at operating frequencies greater than 2OkHz.
- HE-HCI lamp HCl: mercury lamp
- Metal halide lamp a sinusoidal
- the gesweepte AC operating voltage is additionally amplitude modulated, advantageously the modulation according to the geometry of the lamp burner both in frequency, usually between 23kHz to 3OkHz, as well as in the modulation depth between 5% to 30%, is adjustable.
- the amplitude modulation serves to excite a special longitudinal acoustic resonance in the Plasma arc, which causes an increased mixing of the gas components in the combustion chamber (colormixing).
- Sweep operation and amplitude modulation result in a more homogeneous luminance along the plasma arc and a significant increase in luminous efficacy, allowing an increase in efficiency, for example, from 80LPW to 150LPW.
- HE-HCI lamp or a MF-HCI lamp requires an alternating operating voltage in a frequency range between preferably 2OkHz and 10OkHz.
- An output stage of an electronic ballast is usually a specially tuned
- Oscillating circuit half-bridge inverter or full-bridge inverter designed for coupling to the lamp.
- Such a designed for normal operation of the lamp resonant circuit is not suitable for the generation of a high ignition voltage (in particular greater than 1OkV).
- variable wiring with variable cable length up to a length of, for example, 3m and the limited suitability of the lines for carrying voltages above 1OkV must be considered.
- This also contradicts a generation of higher ignition voltages directly in or at the output of the electronic ballast.
- the H michzünddition is usually realized with a separate ignition unit, this ignition unit is looped in the immediate vicinity of the lamp in series in the lamp circuit.
- serially connected hot ignition voltage modules have a significant residual resistance in normal operation, which causes significant electrical operating losses.
- the object of the invention is to avoid the above-mentioned disadvantages and in particular to provide a possibility to provide an ignition voltage for a lamp, this measure allows little to no losses during normal operation of the lamp (after the switch-on).
- a device for generating a starting voltage for a lamp
- a second resonant circuit is connected upstream.
- the switch is activated directly and the electrical energy present in the resonant circuit can be used to ignite the lamp.
- Ignition voltage can be achieved.
- a Provided supply line over which electrical energy can be efficiently transported in the form of a low voltage the actual transformation takes place in the high voltage in the first resonant circuit.
- the switch can be activated in the first resonant circuit on the basis of a voltage that rises.
- the switch comprises at least one of the following components:
- the second resonant circuit supplies the first resonant circuit with electrical energy for generating the ignition voltage via a line.
- the second resonant circuit is arranged in an electronic ballast.
- the electronic ballast in particular for operation of the second resonant circuit comprise a half-bridge circuit or a full-bridge circuit.
- a microcontroller and / or a processor unit which controls the second resonant circuit and / or the first resonant circuit.
- the microcontroller or the processor unit controls the control of the half-bridge or the full bridge of the electronic ballast, so as to the first resonant circuit or the second resonant circuit with electrical pulses or signals at adjustable frequency to stimulate.
- the microcontroller In the context of an additional development, it is possible for the microcontroller to drive the first resonant circuit and / or the second resonant circuit repeatedly, in particular with varying frequencies.
- a next development is that the first resonant circuit and the switch are arranged in the vicinity of the lamp.
- the ignition voltage can be given over a short line directly to the lamp.
- An embodiment is that the first resonant circuit are arranged in a H meetzündmodul.
- An alternative embodiment is that the first resonant circuit is connected in series with the switch.
- a next embodiment is that a bypass element is provided parallel to the series circuit of the first resonant circuit and the switch.
- the bypass element is preferably set up such that the first resonant circuit consumes as little energy as possible during normal operation of the lamp (after its ignition). It is also an embodiment that the bypass element is a longitudinal impedance.
- bypass element comprises a longitudinal impedance in the lamp lead and / or a longitudinal impedance in the lamp return.
- An additional embodiment is that the longitudinal impedance in the lamp lead and the longitudinal impedance in the lamp return are arranged in a different orientation on a core.
- the lamp is a high-pressure gas discharge lamp, in particular a HE-HCI lamp.
- the above object is also achieved by a method for driving the aforementioned device by means of a processor device or by means of a hard-wired logic circuit.
- the second resonant circuit and / or the first resonant circuit are driven by the processor unit or the hardwired logic circuit (e.g., by an ASIC or an FPGA) such that one or more resonant frequencies can be excited.
- the processor unit or the hardwired logic circuit e.g., by an ASIC or an FPGA
- Fig.l a circuit arrangement for operating a gas discharge lamp via an electronic ballast, which is designed as a half-bridge, and connected via a lamp line to the electronic ballast H deviszündmodul, which is preferably provided in the vicinity of the gas discharge lamp;
- FIG. 2 shows a model circuit diagram comprising two resonant circuits which are connected in series
- FIG. 3A equations that can be used in particular for determining the resonance frequencies
- FIG. 3B equations representing voltage curves as a function of the frequency for the coupled resonant circuits according to FIG.
- FIG. 5 shows a circuit arrangement according to Fig.l with a
- FIG. 6 shows a circuit arrangement according to Fig.l with a
- FIG. 7A, 7B show a circuit arrangement according to FIG. 1 with a passage impedance or longitudinal inductance in the lamp lead as well as with a passage impedance or longitudinal inductance in the lamp return line, wherein both passage impedances in opposite windings are arranged on a common core;
- FIG. 8 shows a circuit arrangement according to FIG. 1 without a passage impedance, wherein a resonance circuit provided in the hot ignition module generates an ignition voltage which is directly generated by means of an ignition electrode (preferably capacitive) is coupled to the lamp.
- an electronic ballast (ECG) is provided.
- the output of the electronic ballast preferably has a half-bridge inverter or a full-bridge inverter, by means of which a nominal operation of the lamp at frequencies between 2OkHz and 10OkHz is made possible.
- a hot ignition module can be advantageously placed in the immediate vicinity of the lamp (preferably at a distance of approximately at most 30 cm) to ignite the lamp.
- This H mustzündmodul generates the necessary ZündHarspulse> 10kV, but these are preferred
- Zündnapspulse be set free only to the lamp on the remaining short piece of lamp line and not retroactively over the longer line pieces in the direction of the electronic ballast.
- the hot ignition module In the normal operation of the lamp, ie after its ignition or switch-on phase, the hot ignition module preferably has a low through-inductance (preferably less than a few 100 ⁇ H) in order to minimize the operating losses.
- the H exertzündmodul in the immediate vicinity of the lamp in the lamp line is looped and for the high-frequency operating mode of a HE-HCI lamp or MF-HCI lamp is a sufficiently low through impedance.
- the H accomplishes the following functions:
- Ignition pulses means for generating voltage pulses, which preferably have a height of about 2OkV.
- the Htechnikzündmodul itself can be operated directly on the lamp leads via the electronic ballast and thus does not require even active control electronics or an additional external power supply for generating the voltage pulses.
- the hot ignition module is advantageously decoupled from the electronic ballast and from the lamp by means of a small series inductance (for example of the order of magnitude of 200 ⁇ H).
- the series inductance is switched between the input and the output of the hot ignition module.
- HV-PuIs high-voltage pulse
- the longitudinal inductance has a sufficient length
- the LC resonant circuit in the hot ignition module is first isolated and operated in a free-running manner, so that the resonance can rise to as low as possible undamped to voltage values of up to 2OkV without the influence of external damping influences at high quality.
- the oscillating LC resonant circuit is coupled via a switch to the line piece towards the lamp.
- the switch can be realized in different ways.
- the switch may comprise a spark gap with a predetermined breakdown voltage, a semiconductor switch or an ignition electrode.
- the connected spark gap switches at its defined level
- This ignition voltage hits a high-impedance lamp and generates an ignition breakdown in it.
- the connected to the Htechnikzündmodul electronic ballast itself is always operatively connected to the lamp via the internal low-inductance L jossinduktterrorism and can immediately after detection of Zünd bebruchs its normal lamp operation, in this case the lamp startup operation record.
- Fig.l comprises an ECG half-bridge 101, which is connected via a lamp line 103 with a H constitutionzündmodul 102.
- a lamp 105 is connected to the hot ignition module 102 via a lamp line 104.
- the lamp line 103 is preferably shorter than 3 meters and the lamp line 104 is preferably made shorter than 30 centimeters.
- the ECG half-bridge 101 comprises three inputs 106, 107 and 108, two outputs 110 and 111, two semiconductor switches, in particular n-channel MOSFETs, Q1 and Q2, a coil L1 and two capacitors C1 and CB1.
- the input 106 supplies the ECG half-bridge 101 with a voltage
- the input 107 is connected to the gate terminal of the MOSFET Q1 and the input 108 is connected to the gate terminal of the MOSFET Q2.
- the source terminal of the MOSFET Q1 is connected to the drain terminal of the MOSFET Q2 and to a node 109 via the coil L1.
- the capacitor Cl is connected on the one hand to the node 109 and on the other hand to the source terminal of the MOSFET Q2 and to the output 111.
- the capacitor CB1 is connected on the one hand to the node 109 and on the other hand to the output 110.
- the drain terminal of the mosql Ql is connected to the input 106.
- the hot ignition module 102 includes inputs 112 and 113 and outputs 114 and 115. Further, the hot ignition module 102 includes an LC resonant circuit 116, a switch 117 and a coil LR2 (longitudinal inductance).
- the LC resonant circuit 116 includes a coil L2 and a capacitor C2.
- the switch 117 is preferably designed as a spark gap (eg 17 kV).
- the coil L2 is connected on the one hand to the input 112 and on the other hand to a terminal of the capacitor C2 and to a terminal of the switch 117.
- the other terminal of the capacitor C2 is connected to the input 113, which in turn is connected to the output 115.
- the other terminal of the switch 117 is connected to the output 114 and via the coil LR2 to the input 112.
- the lamp 105 is connected to the outputs 114 and 115 of the hot igniter module 102.
- the lamp 105 is preferably designed as a high-pressure gas discharge lamp.
- the LC resonant circuit 116 is excited via the electronic ballast half-bridge 101 until it transmits via the switch 117 a voltage> 15 kV via the output 114 to the lamp 105 and preferably ignites the lamp 105.
- the lamp 105 After being ignited by the hot ignition module 102, the lamp 105 can be detected from the ECG half-bridge 101 via the
- Longitudinal inductance LR2 are operated (normal operation of the lamp 105).
- the lamp 105 is preferably operated in a frequency range (e.g., less than 10 kHz) in which the LC resonant circuit 116 is almost completely passive. Accordingly, in particular no Zündditionsüberhöhungen arise.
- the inputs 107 and 108 of the ECG half-bridge are suitably controlled, in particular via a microcontroller or a processor, in order to excite the resonant circuits with specific frequencies. It is possible that the frequency change itself is modulated and / or certain frequency sweeps are generated to the
- Cover resonant frequency (s) of the resonant circuits It is also possible that several ignition events in a row be performed to ensure that the lamp ignites. Furthermore, it is possible for the control device (processor, microcontroller or the like) to check after a predetermined number of ignition events whether the lamp is burning. Possibly. a non-burning lamp can be detected as a fault and the system shut down.
- the capacitor CB1 ("blocking capacitor") of the ECG half-bridge 101 is preferably of large dimensions and serves to block a DC component from the half-bridge. This capacitor CB1 hardly influences the position of the resonance points. Alternatively, the capacitor CB1 may also be located elsewhere, e.g. in the lamp return, be provided.
- the LC resonance circuit 116 of the hot ignition module 102 is preferably designed such that it has no resonance points in nominal lamp operation (in particular at an operating frequency of less than 10OkHz).
- a natural resonant frequency of the LC resonant circuit 116 is greater than 10OkHz to specify. Consequently
- L2 values of up to 3OmH can be provided.
- the natural resonance frequency of the LC resonance circuit 116 in the hot ignition module 102 results
- the external LC resonance circuit 116 in the hot ignition module 102 has a low impedance. An operation at this frequency is preferably to be avoided, since here the output voltage of the resonant circuit of the electronic ballast half-bridge based on the coil Ll and the capacitor Cl would be kept at zero and loaded short-circuit.
- FIG. 2 an equivalent circuit diagram of two series-connected resonant circuits according to FIG. 2 is suitable.
- the structure of Figure 2 largely corresponds to Fig.l. It only accounts for the capacitor CBl, the switch 117 and the longitudinal inductance LR2 and the lamp 105. This results in the two resonant circuits LlCl and L2C2, the center tap between L2 and C2 is referred to as a node 201 and at this node, a voltage U2 is applied (In Fig.l the switch 117 is connected to this node).
- the resonant circuit LIC1 represents a source resonance in the ECG half-bridge, and the resonant circuit L2C2 represents a hot-firing resonance in the hot-start module.
- Equations (G.1) to (G.6) are shown in FIGS. 3A and 3B.
- the double resonance cycle resulting from FIG. 2 can be described by the differential equation (G.1).
- the associated characteristic polynomial has degree 4 and is given in equation (G.2).
- the four associated pairwise conjugate complex zeroes yield the two resonance frequencies f ⁇ m and / ⁇ according to equations (G.3) and (G.4).
- the resonance frequencies are too
- the voltage curve Ul (f) corresponds to the voltage curve over the frequency for the output of the inner oscillating circuit directly at the output of the ECG half-bridge and the voltage curve U2 (f) corresponds to the voltage curve over the frequency for the output of the outer oscillating circuit directly at the input of the 15 kV Spark gap.
- the lamp is operated (see above in connection with Fig.l) in a frequency range from 2OkHz to 9OkHz.
- the frequency /; OJ TM 102.7 kHz is the first resonant frequency of the double-resonance circuit, where a lamp at the output of the ignition module can be excited.
- the frequency / os TM 112.5 kHz corresponds to the natural resonance frequency of the LC resonance circuit 116 according to FIG. 1, in which the inner resonance circuit (LCl1 in FIG. 1) is subjected to a short-circuit.
- the double-resonance circuit has its second resonant frequency, which can also be used to excite the lamp at the output of the ignition module.
- FIG. 5 shows a circuit arrangement comprising the ECG half-bridge 101 and the H deviszündmodul 102 according to Fig.l.
- the longitudinal inductance LR2 provided in the hot ignition module 102 is in this case arranged in the lamp feed line, the high voltage generated in the hot ignition module 102 is coupled into the lamp feed line.
- FIG. 6 shows a circuit arrangement comprising the electronic ballast half-bridge 101, which is connected via the lamp line 103 to a hot ignition module 601 (comprising inputs 602 and 603 and outputs 604 and 605), in particular to the inputs 602 and 603 of the hot ignition module 601.
- the lamp 105 is connected via the lamp line 104.
- the input 602 is connected to the output 604.
- the input 602 is further connected to a node 606 via a coil L2B.
- a capacitor C2B is provided between the accounts 606 and the input 603 and between the node 606 and the output 605 is a switch, in particular a spark gap (15kV) arranged.
- the input 603 is connected to the output 605 via a coil LR2B (longitudinal inductance).
- the longitudinal impedance LR2B is located in the lamp return line in FIG. 6, and the high voltage generated in the hot ignition module 601 is coupled into the lamp return conductor (at the output 605 of the hot ignition module 601).
- FIG. 7A shows an alternative circuit arrangement comprising the ECG half bridge 101 according to FIG. 1 and a hot ignition module 701 (with inputs 702, 703 and outputs 704, 705).
- the ECG half-bridge 101 is connected via the lamp line 103 to the inputs 702 and 703 of the hot ignition module 701.
- the lamp 105 is connected via the lamp line 104.
- the input 702 of the hot ignition module 701 is connected to a node 707 via a coil L2C.
- a capacitor C2C is connected between the input 703 and the node 707.
- Spark gap (15 kV) is connected on the one hand to the node 707 and on the other hand to the output 704.
- an inductance LR2C1 is provided and between the input 703 and the output 705, an inductance LR2C2 is provided, wherein the
- Inductors LR2C1 and LR2C2 are arranged in a differential arrangement sense on the same core, whereby the total effective longitudinal impedance quadruples according to
- L ⁇ , 2 • ⁇ LR2Ci 4-LR2C-2) - i - LR2C-.
- the continuous longitudinal impedance is arranged symmetrically both in the lamp lead and in the lamp return line.
- An advantage of this switching arrangement is that the ignition voltage across the spark gap in the Lamp lead is injected or coupled, due to the transformation effect on the lamp in double height is effective.
- FIG. 7B shows an alternative circuit arrangement according to FIG.
- Fig.7A in which the ignition voltage is coupled via the spark gap in the lamp return line and is effective as a result of the transformation effect on the lamp in double height.
- FIG. 8 shows an alternative circuit arrangement comprising the ECG half bridge 101 according to FIG. 1 and a hot ignition module 801 (with inputs 802, 803 and outputs 804, 805 and 806).
- the ECG half bridge 101 is connected via the lamp line 103 to the inputs 802 and 803 of the hot ignition module 801.
- a lamp 807 is connected via the lamp line 104.
- the lamp 807 has an ignition electrode, which is fed via the output 806 of the hot ignition module 801.
- the input 802 is connected to the output 804 and the input 803 is connected to the output 805.
- a coil L2D is provided and between the input 803 and the output 806, a capacitor C2D is arranged.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2008/052220 WO2009106120A1 (de) | 2008-02-25 | 2008-02-25 | Vorrichtung und verfahren zur erzeugung einer zündspannung für eine lampe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2248393A1 true EP2248393A1 (de) | 2010-11-10 |
| EP2248393B1 EP2248393B1 (de) | 2013-04-03 |
Family
ID=40105289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08709193A Not-in-force EP2248393B1 (de) | 2008-02-25 | 2008-02-25 | Vorrichtung und verfahren zur erzeugung einer zündspannung für eine lampe |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20110006695A1 (de) |
| EP (1) | EP2248393B1 (de) |
| JP (1) | JP2011513903A (de) |
| KR (1) | KR20100120306A (de) |
| CN (1) | CN101965754B (de) |
| WO (1) | WO2009106120A1 (de) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19923237A1 (de) * | 1999-05-20 | 2000-11-23 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Schaltungsanordnung, zugeordnetes elektrisches System sowie Entladungslampe mit derartiger Schaltungsanordnung und Verfahren zu ihrem Betrieb |
| US6337800B1 (en) * | 2000-02-29 | 2002-01-08 | Philips Electronics North American Corporation | Electronic ballast with inductive power feedback |
| US6459214B1 (en) * | 2001-04-10 | 2002-10-01 | General Electric Company | High frequency/high power factor inverter circuit with combination cathode heating |
| GB2400245B (en) * | 2003-04-01 | 2005-09-28 | Power Gems Ltd | Ignition system for a high-frequency high-intensity discharge lamp system |
| JP4348984B2 (ja) * | 2003-04-01 | 2009-10-21 | パナソニック電工株式会社 | 高圧放電灯点灯装置 |
| DE10333729A1 (de) * | 2003-07-23 | 2005-03-10 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Vorschaltgerät für mindestens eine Hochdruckentladungslampe, Betriebsverfahren und Beleuchtungssytem für eine Hochdruckentladungslampe |
| JP2005078910A (ja) * | 2003-08-29 | 2005-03-24 | Mitsubishi Electric Corp | 高輝度放電ランプ点灯装置 |
| DE102004020499A1 (de) * | 2004-04-26 | 2005-11-10 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Schaltungsanordnung zum Betrieb von Hochdruckentladungslampen und Betriebsverfahren für eine Hochdruckentladungslampe |
| US7271545B2 (en) * | 2005-10-07 | 2007-09-18 | Delta Electronics, Inc. | Ballast and igniter for a lamp having larger storage capacitor than charge pump capacitor |
-
2008
- 2008-02-25 KR KR1020107021470A patent/KR20100120306A/ko not_active Withdrawn
- 2008-02-25 CN CN200880127462.2A patent/CN101965754B/zh not_active Expired - Fee Related
- 2008-02-25 JP JP2010547963A patent/JP2011513903A/ja not_active Withdrawn
- 2008-02-25 US US12/919,442 patent/US20110006695A1/en not_active Abandoned
- 2008-02-25 EP EP08709193A patent/EP2248393B1/de not_active Not-in-force
- 2008-02-25 WO PCT/EP2008/052220 patent/WO2009106120A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009106120A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2248393B1 (de) | 2013-04-03 |
| CN101965754B (zh) | 2014-06-04 |
| JP2011513903A (ja) | 2011-04-28 |
| WO2009106120A1 (de) | 2009-09-03 |
| US20110006695A1 (en) | 2011-01-13 |
| KR20100120306A (ko) | 2010-11-15 |
| CN101965754A (zh) | 2011-02-02 |
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