EP2090142A1 - Circuit et procédé pour faire fonctionner une lampe à décharge haute pression - Google Patents
Circuit et procédé pour faire fonctionner une lampe à décharge haute pressionInfo
- Publication number
- EP2090142A1 EP2090142A1 EP06829961A EP06829961A EP2090142A1 EP 2090142 A1 EP2090142 A1 EP 2090142A1 EP 06829961 A EP06829961 A EP 06829961A EP 06829961 A EP06829961 A EP 06829961A EP 2090142 A1 EP2090142 A1 EP 2090142A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit arrangement
- amplitude
- arrangement according
- feed signal
- frequency
- 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
- H05B41/292—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2928—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal 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
- H05B41/288—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
Definitions
- the present invention relates to a circuit arrangement for operating a high pressure discharge lamp with egg ⁇ nem electronic ballast, which is designed readiness determine an AC feed signal for the high pressure discharge lamp, wherein the frequency of the AC feed signal is min ⁇ least 1 MHz. Moreover, it relates to a procedural ⁇ ren for operating a high pressure discharge lamp with egg ⁇ nem AC feed signal, wherein the frequency of the AC supply signal is at least 1 MHz.
- High-pressure discharge lamps as used, for example, as video projection lamps, usually have two similar electrodes, which are generally of a rod-shaped design.
- Such jumping arc approach affected insbeson ⁇ particular, the use of high intensity discharge lamps in optical devices, such as projection devices, BEA and microscope lighting, and may result in useless application.
- the current pulse before the commutation leads to a brief increase in temperature at the current leading points of the arc at the electrodes, mainly the current anode.
- material accumulation occurs, i. H.
- the electrode metal tungsten from the gas cycle process is deposited with the tungsten halides on the electrodes, as well as a spike on the electrodes, which stabilizes the discharge and the approach of the arc very effectively.
- the present invention is therefore the object of the above-mentioned circuit arrangement or the aforementioned method such that in the specified frequency range, ie in RF operation of the high-pressure discharge lamp, jumping of the approach of the arc is reliably prevented on the electrode tips.
- the present invention is based on the finding that a very effective stabilization of the arc in high-frequency operation can be achieved when the AC feed signal is modulated in amplitude.
- the Ursa ⁇ chen this are currently not yet fully understood, since in addition amplitude amplitudes and amplitude reductions bring about the success of the invention and to avoid flickering of discharge arcs in general, especially plasma arcs in Hochlichentla ⁇ tion lamps lead.
- An indication for this is that a stabilizing peak formation similar to that which results in operation with the circuit arrangement presented in the aforementioned US Pat. No. 5,608,294 does not take place until after a few hours. In other words, this means that the actual explanation for the solution according to the invention is not to be found in the peak formation.
- a stabilization is achieved which satisfies even the high optical requirements for projection lamps.
- HF operation In contrast to LF operation, HF operation enables simple, even single-stage ballasts. This made light ⁇ compared to the current state of the art (low-frequency operation) greatly reduced and thus significantly cheaper ⁇ ballasts.
- the amplitude modulation represents a pulse modulation. sondere acoustic resonances Re ⁇ achieved outside the range greater stabilization of the arc by a pulsed, periodically repeated amplitude modulation of the AC feed signal.
- the pulse modulation has a repetition frequency of 100 Hz to 100 kHz, preferably from 100 Hz to 2 kHz.
- the duty cycle of the pulse modulation is preferably between 1% and 50%, be ⁇ vorzugt between 3% and 20%. From the perspective of video projection applications, duty cycles have proven to be very advantageous in which the modulation pulses take only very short periods of time, in particular periods of time which are shorter than the image dark gap.
- the amplitude modulation of the AC feed signal may be at a constant frequency, but may also be accompanied by a frequency change.
- the changed frequency is in a range of - 50% to + 100%, preferably in a range of - 10% to + 10%, the frequency of the AC feed signal.
- the pulse modulation can be characterized by an amplitude increase compared to the unmodulated AC feed signal. Particularly good results with regard to the stabilization of the arc have resulted in amplitude peaks between 20% and 1000%, preferably between 20% and 200%, of the amplitude of the unmodulated AC feed signal.
- the Pulsmodula ⁇ tion can also be characterized by a reduction in amplitude compared to the unmodulated AC feed signal.
- the amplitude reduction is between - 5% and - 90% of the unmodulated AC supply signal.
- the pulse modulation can be characterized by a sequence of amplitude peaks, a sequence of amplitude decreases and a sequence of amplitude peaks and amplitude decreases, which alternate with each other.
- the amplitude peaks and / or amplitude noise will always be positive amplitudes or always negative amplitudes or alternately positive and negative amplitudes or simultaneously in positive or negative amplitude of the unmodulated AC feed signal.
- the sequence of an amplitude increase with an immediately following amplitude reduction or the reverse order has proved to be particularly advantageous.
- the success according to the invention has been achieved in the case of a wide variety of pulse shapes, in particular in the case of rectangular, triangular, semi-sinusoidal, rectangular with exponential rise or sawtooth-shaped pulse shape.
- the electronic ballast preferably comprises: an input terminal for turning close to an input voltage, an output terminal for providing an AC feed signal to the high ⁇ pressure discharge lamp and, disposed between the matterssan ⁇ circuit and the output terminal series ⁇ factory circuit of an inverter and a Lastnetz-, wherein the inverter an AC output lessons ⁇ output voltage with a predetermined frequency, a pre- provides a variable amplitude and a predeterminable duty cycle to the load network.
- the predefinable frequency and / or the predefinable amplitude of the inverter output voltage is preferably changed.
- the load network has at least one transformer which is arranged at the input and / or the output and / or between the input and the output of the load network. This proves to be particularly useful in the case of very low or high operating voltages or in the demand for a safe electrical isolation, which is here, for example, the railway standard of 2 kV to think.
- the load network is preferably designed so that it can be brought into resonance by changing the predeterminable frequency of the inverter output voltage, thereby generating the ignition voltage for ignition of the high-pressure discharge lamp. This eliminates the provision of a separate ignition device.
- the high-pressure discharge lamp to a Be ⁇ operating pressure of 100 to 500 bar.
- FIG. 1 in a schematic representation of the structure of a circuit arrangement according to the invention
- FIG. 2 is a selection of various embodiments for a load network of the circuit of FIG. 1;
- FIG. 4 shows a first embodiment of an inverter for the circuit arrangement of FIG. 1;
- FIG. 5 shows a second embodiment of an inverter for the circuit arrangement of FIG. 1;
- VCO Voltage Controlled Oscillator
- Fig. 1 shows a schematic representation of the structure of a circuit arrangement according to the invention.
- the input voltage Ue which in particular can represent the so-called intermediate circuit voltage, is supplied to a high-frequency inverter 10.
- Its output signal is characterized by a specifiable Amplitu ⁇ de, a predetermined frequency and a predetermined Tast ⁇ ratio. These predefinable variables can be set via an interface (not shown) on the inverter 10.
- the output signal Ua of the alternating ⁇ judge 10 is fed to a load network 12.
- a lamp current I L is provided to the high pressure discharge lamp 14.
- the load network ⁇ unit 12 forms the approximately sinusoidal lamp current I L from the output voltage Vout of the inverter 10 and serves to limit the current.
- the lamp current may be dependent on both the frequency and the amplitude of the output voltage of the inverter.
- the load network 12 is also designed so that it brought by changing the predetermined frequency of the output voltage Ua of the inverter in resonance who ⁇ can, so as to generate the ignition voltage for the high-pressure discharge lamp.
- Fig. 2 shows various embodiments of a geeig ⁇ Neten load network.
- the condensate Tor C 2 can be designed differently: Once to contribute to the resonant network, on the other hand only for DC separation. Is inserted at least one transformer at the input or output or between the input and the output of the Lastnetz- drive 12, so therefore in particular a galvanic separation can be administratge ⁇ represents.
- pure series circuits of LC elements as well as circuits in ⁇ -arrangement can be used for the purposes of the present invention.
- the objects of the present invention can also be achieved with higher order load networks.
- Fig. 3 shows the transfer function of the lamp current I L as a function of the frequency f of the input voltage Ue for the load network shown in Fig. 2a. There are shown two working points APl and AP2, is returned to the loading with ⁇ train in FIG. 8.
- Figures 4 and 5 show examples of inverters 10 suitable for the circuit arrangement of Figure 1. 4 shows a switch-relieved class
- a voltage-controlled, frequency-variable oscillator can be shared. the one that is usually available anyway for power or power control.
- FIG. 6 shows the generation of the drive signals for the inverter according to FIG. 5.
- a pulse signal P is added to the already present control signal Q for operation in the adder 16.
- This control signal is supplied ei ⁇ nem VCO 18, which supplies it to a pulse shaper 20th
- the drive signals for the switches Sl, S2 of the change Rich ⁇ ters 10 are provided.
- the time course of the lamp current I L ⁇
- the shift of the operating point from AP1 to AP2 is associated with a change in the frequency.
- the frequency at the operating point AP2 is lower than the frequency at the operating point AP1, but the lamp current I L has a higher amplitude at the operating point AP2 than at the operating point AP1.
- the modulation can be made by changing the amplitude of the input voltage of the inverter 10.
- This voltage during the pulse duration can also be an increased lamp current I L can be achieved, see the timing of the lamp current I L of Fig. 7, in which the amplitude at the operating point APL is greater than the amplitude at the operating point AP2, the frequency however, it remains unchanged.
- this is particularly preferably an upstream, quickly controllable DC / DC converter.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2006/068269 WO2008055544A1 (fr) | 2006-11-09 | 2006-11-09 | Circuit et procédé pour faire fonctionner une lampe à décharge haute pression |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2090142A1 true EP2090142A1 (fr) | 2009-08-19 |
EP2090142B1 EP2090142B1 (fr) | 2012-06-27 |
Family
ID=38198419
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06829961A Not-in-force EP2090142B1 (fr) | 2006-11-09 | 2006-11-09 | Circuit et procédé pour faire fonctionner une lampe à décharge haute pression |
Country Status (6)
Country | Link |
---|---|
US (1) | US8339057B2 (fr) |
EP (1) | EP2090142B1 (fr) |
KR (1) | KR101358173B1 (fr) |
CN (1) | CN101523997A (fr) |
TW (1) | TW200829084A (fr) |
WO (1) | WO2008055544A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6055170B2 (ja) * | 2011-06-15 | 2016-12-27 | セイコーエプソン株式会社 | 光源装置、放電灯の駆動方法およびプロジェクター |
JP5768558B2 (ja) | 2011-07-25 | 2015-08-26 | セイコーエプソン株式会社 | 光源装置、放電灯の駆動方法およびプロジェクター |
KR102125026B1 (ko) * | 2018-05-17 | 2020-06-19 | 주식회사 뉴파워 프라즈마 | 플라즈마 전원용 공진 네트워크 및 플라즈마 발생기용 전력공급장치 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4123187A1 (de) * | 1991-07-12 | 1993-01-14 | Tridonic Bauelemente | Vorschaltgeraet zum pulsbetrieb von gasentladungslampen |
TW339496B (en) | 1994-06-22 | 1998-09-01 | Philips Electronics Nv | Method and circuit arrangement for operating a high-pressure discharge lamp |
US5684367A (en) * | 1996-01-16 | 1997-11-04 | Osram Sylvania Inc. | Color control and arc stabilization for high-intensity, discharge lamps |
DE19829600A1 (de) | 1998-07-02 | 1999-09-23 | Seufert Gmbh Dr | Betriebsverfahren und elektronisches Vorschaltgerät für Hochdruck-Wechselspannungs-Entladungslampen |
EP1321013A4 (fr) * | 2000-07-21 | 2003-10-01 | Osram Sylvania Inc | Procede et appareil de detection a l'arc et de protection de regulateurs electroniques |
US6680582B1 (en) * | 2000-10-06 | 2004-01-20 | Koninklijke Philips Electronics N.V. | System and method for employing pulse width modulation for reducing vertical segregation in a gas discharge lamp |
US6566817B2 (en) | 2001-09-24 | 2003-05-20 | Osram Sylvania Inc. | High intensity discharge lamp with only one electrode |
US6737815B2 (en) * | 2001-12-21 | 2004-05-18 | Koninklijke Philips Electronics N.V. | Reducing vertical segregation in a HID lamp operated at VHF frequencies using simultaneous arc straightening and color mixing |
JP4186578B2 (ja) * | 2002-10-09 | 2008-11-26 | ウシオ電機株式会社 | 高圧放電ランプ点灯装置 |
DE102005028417A1 (de) | 2005-06-20 | 2006-12-28 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Vorrichtung zum Bereitstellen einer sinusförmig amplitudenmodulierten Betriebsspannung, Beleuchtungssystem und Verfahren zum Erzeugen einer amplitudenmodulierten Spannung |
-
2006
- 2006-11-09 EP EP06829961A patent/EP2090142B1/fr not_active Not-in-force
- 2006-11-09 CN CN200680056092A patent/CN101523997A/zh active Pending
- 2006-11-09 WO PCT/EP2006/068269 patent/WO2008055544A1/fr active Application Filing
- 2006-11-09 US US12/514,449 patent/US8339057B2/en not_active Expired - Fee Related
- 2006-11-09 KR KR1020097011826A patent/KR101358173B1/ko not_active IP Right Cessation
-
2007
- 2007-11-05 TW TW096141695A patent/TW200829084A/zh unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2008055544A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR20090087049A (ko) | 2009-08-14 |
US8339057B2 (en) | 2012-12-25 |
CN101523997A (zh) | 2009-09-02 |
US20100134032A1 (en) | 2010-06-03 |
KR101358173B1 (ko) | 2014-02-07 |
TW200829084A (en) | 2008-07-01 |
WO2008055544A1 (fr) | 2008-05-15 |
EP2090142B1 (fr) | 2012-06-27 |
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