CN101322445A - System and method for operating a gas discharge lamp and method of use thereof - Google Patents
System and method for operating a gas discharge lamp and method of use thereof Download PDFInfo
- Publication number
- CN101322445A CN101322445A CNA2006800453221A CN200680045322A CN101322445A CN 101322445 A CN101322445 A CN 101322445A CN A2006800453221 A CNA2006800453221 A CN A2006800453221A CN 200680045322 A CN200680045322 A CN 200680045322A CN 101322445 A CN101322445 A CN 101322445A
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- Prior art keywords
- lamp
- square wave
- discharge lamp
- secondary winding
- gaseous discharge
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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
- H05B41/26—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
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The invention relates to a system for operating at least one gas discharge lamp comprising: a square wave current source for producing a substantially square wave current; and at least one transformer having a primary winding and at least one secondary winding; the at least one secondary winding being connectable to at least one gas discharge lamp; the square wave current source being directly coupled to the primary winding of the at least one transformer for directly providing the square wave current thereto.
Description
Technical field
The present invention relates to be used to operate the system and method for at least one gaseous discharge lamp, and relate to the use of said system.
Background technology
The conventional ballast system that is used for to a plurality of lamps power supplies as disclosed system in US6232726, comprises alternating-current voltage source and a plurality ofly is used to isolate said lamp and the direct-connected transformer of said voltage source.Said system comprises resonant circuit, and it is that elementary winding by the impedance of resonant inductor and transformer forms.The resonant capacitance of the resonant circuit that the igniting of lamp needs is that the electric capacity by each transformer produces.Resonant inductance is formed by resonant inductor.Each Secondary winding of transformer is connected to said lamp.
Though the ballast of US 6232726 is in that to drive aspect a plurality of lamps function good, it needs resonant circuit these lamps of lighting a fire.Also have, the connection of lamp and disconnection will influence the voltage on other lamp.
US4293799 provides a kind of power-supply system of operating fluorescent lamp.This system comprises constant-current source, and it is used for the elementary winding power supply to the transformer of being connected in series.Capacitor is connected with the primary windings in series.Fluorescent lamp is connected to each secondary winding of transformer.Said power supply comprises oscillator, and it provides the alternating voltage of adjusting.This voltage is added to the resonant circuit with several capacitors and coil.Capacitor bank between this resonant circuit and the elementary winding humorous supply frequency of being transferred to voltage source of getting up.
For example,, there are the needs of simplifying ballast system perhaps in order to improve the life-span in order to reduce production cost always.For example just can achieve this end by the number that reduces parts.Therefore expectation provides a kind of ballast system through improving, and it no longer needs resonant circuit.
Summary of the invention
According to a first aspect of the present invention, the system that is used to operate at least one gaseous discharge lamp comprises:
-square wave current source is used to produce the electric current that is essentially square wave;
-have at least one transformer of elementary winding and secondary winding;
-secondary winding is connected to one or more gaseous discharge lamps;
-square wave current source is directly coupled to the elementary winding of described at least one transformer, is used for directly providing square wave current to it.
Owing to reduced part count, the simplification of system has reduced production and labour cost.Also have, comprise that the system of less parts is proved to be more solid and reliable, and have the long life-span.By using current source, the electric current in the elementary winding is invariable basically, therefore no longer needs observation circuit separately to detect the state of lamp load.The startup of described at least one lamp is to take place by the inductance of elementary winding and square wave current.When the switch current direction, on secondary winding, produce voltage peak, because gaseous discharge lamp was in non-conductive state before igniting.Give described at least one lamp power supply by current source, lamp is connected or disconnection, and can not influence other lamp.
In an embodiment who drives a plurality of lamps, said system comprises at least two transformers, the mutually direct series coupled of the elementary winding of described at least two transformers.According to the present invention, no longer need to provide capacitor or any other parts to form resonant circuit.Do not have additional resonant circuit just can operate a plurality of lamps, thereby no longer need the capacitor between elementary winding and the resonant inductance.
In one embodiment, said system comprises at least two lamps.Surprisingly, according to the present invention, at least two lamps that are operationally connected to same secondary winding are possible, thereby have further reduced the number of parts.
The lamp with different lamp power can be operated by system of the present invention.By with the elementary winding of invariable current drives, the lamp power of at least one lamp can be different with the lamp power of another lamp.
Square wave current source can comprise full bridge structure, and described full bridge structure comprises 4 switches, and these switches all are connected to DC power supply.
Said system can also comprise controller, and described controller is connected to switch, is used for the switching frequency of control switch.
In an alternative embodiment, described at least one transformer comprises autotransformer.
In one embodiment, the scope of switching frequency be 50 hertz to 1300 KHz, preferred range at 90 hertz to 500 KHz.These switching frequencies are proved to be useful because they be suitable for respectively driving low pressure and high-voltage gas discharging light the two, for example fluorescent lamp or metal halid lamp.Preferred frequency can be relatively low, and 50 hertz to 10 KHz, so that prevent to take place acoustic resonance in high-voltage gas discharging light.Can use higher frequency, for example in the frequency range of damping acoustic resonance.Such frequency range is included in the frequency between 100 KHz and 1300 KHz.In fluorescent lamp, can use 50 hertz of whole frequency ranges to 1300 KHz.Being equal to or greater than 50 hertz frequency is proved to be and can prevents the visible flicker of human eye.
Preferably, described at least one lamp comprises halide gas discharge lamp.Described at least one lamp can also comprise fluorescent lamp.For example, the power consumption scope of the lamp that system is included is about 5 watts to 1200 watts, and preferred range is 20 watts to 200 watts.
According to second aspect, the invention provides a kind of structure, it comprises system according to claim 1.
According to the third aspect, the invention provides the use of system according to claim 1.
Description of drawings
According to the embodiment of the following stated, these and other aspect of the present invention all is conspicuous, and sets forth with reference to these embodiment.
In the accompanying drawings:
Fig. 1 represents the diagrammatic sketch according to first embodiment of system of the present invention;
Fig. 2 represents the diagrammatic sketch according to second embodiment of system of the present invention;
Fig. 3 represents the diagrammatic sketch according to the 3rd embodiment of system of the present invention;
Fig. 4 represents the diagrammatic sketch according to the 4th embodiment of system of the present invention;
Fig. 5 represents the schematically showing of square wave current output of square wave current source of the present invention;
Fig. 6 be illustrated in the said lamp of igniting during the schematically showing of voltage on a lamp.
Embodiment
Fig. 1 represents to be used to operate the system 1 of at least one gaseous discharge lamp.This diagrammatic sketch of Fig. 1 is represented 7 gaseous discharge lamps 2, with this as an example.This system comprises square wave current source 4, and square wave current source 4 can be connected to external power source through electric wire 6,8.Preferably, current source is connected to main electrical network.The elementary winding 10 of a series of transformers directly is connected in series to current source 4.Secondary winding of transformer 12 is connected to corresponding gaseous discharge lamp 2.
In this improvement embodiment of Fig. 2, arrange again for current source 4, so that directly provide square wave current to for example 2 transformers 20,22.But in this case, transformer is an autotransformer.The elementary winding of these transformers partly is connected in series.Lamp 24,26 is connected to the Secondary winding of transformer part.
Fig. 3 represents an embodiment of system 1, wherein arranges for square wave current source 4, so that directly provide square wave current to the elementary winding of at least one transformer.If system comprises two or more transformers, the elementary winding 40,42 of these transformers that are connected in series so, as shown in Figure 3.These elementary windings are directly coupled to each other once more.Can be with several lamp 44-52, promptly 1, two or more lamp are connected to corresponding winding 54-62.Winding 54-62 is detachably connected to elementary winding 40,42 as secondary winding.That is, at any time, the unit that comprises lamp and winding can be removed or is connected on one of elementary winding from one of elementary winding.
The included square wave current source of embodiment of the system 1 that Fig. 4 represents is simple relatively form, is suitable for above-described embodiment.Arrange DC current source 80 to provide direct current to full bridge structure, said full bridge structure comprises 4 switches 82,84,86,88.Switch preferably includes electronic switch, for example field-effect transistor or any suitable semiconductor switch.Switch is connected to controller in known manner, and this controller is not shown in Fig. 4, this controller is arranged to the switching of control switch.Control for switch, when disconnecting with convenient switch 82 and 88, switch 86 and 84 conduction currents.On the other hand, when switch 86 and 84 disconnects, the electric current in switch 82 and 88 conduction current sources.So for example the elementary winding 90,92 for two transformers provides square wave current, alternating current, described electric current or flow to switch 88 from switch 82 perhaps flows to switch 84 from switch 86.For example, the secondary winding shown in the figure 94,96 is connected to lamp 98,100.Yet, the structure of this square wave current source can with the foregoing description in any one combine.
In use, square wave current source is the electric current of square wave for elementary winding provides basically, as shown in Figure 5, wherein represents current i at vertical pivot, trunnion axis express time t.Each gaseous discharge lamp provides two types load in the different time, at first, is high impedance before starting, and using as a lamp then when bright is relatively low resistance.
Can describe in the elementary winding of transformer and the power that consumes in the secondary winding by following formula (1):
u
L1*i
L1＝u
L2*i
L2
Here, u
L1, u
L2And i
L1, i
L2Represent the voltage and current in first and second windings respectively.Before the lamp igniting, can use the voltage of following formula (2) estimation on the elementary winding of correspondence:
u
L1＝L
1*di
L1/dt
Here, u
L1It is inductance L
1On voltage, inductance L
1Represent the primary winding, di/dt is a certain section time durations current i
L1Variation.
From above-mentioned formula (1) and (2) as can be seen, between transfer period, directly provide square wave current, will on secondary winding, produce voltage peak to elementary winding at the sense of current.Fig. 6 represents is at lamp voltage u on any one secondary winding between the starting period
2Trunnion axis is represented time t.Promptly the lamp owing to correspondence before the igniting lamp is in high impedance status, thereby the i in secondary winding
L2Can ignore.After the lamp igniting, the voltage on secondary winding is lower, and this is because the resistance characteristic of the impedance of lamp causes.
Except the voltage peak that starts 1 kilovolt of required magnitude of low-pressure gaseous discharge lamp (for example fluorescent lamp) is provided, can also provide the relative higher voltage peak value of 5 kilovolts of magnitudes, this relative higher voltage peak value according to system of the present invention is that to start high-voltage gas discharging light (for example high-intensity discharge lamp) needed.The height of voltage peak is regulated and control by formula (2).Because transformation ratio L
1/ L
2Existence, the voltage peak on elementary winding will cause voltage peak on secondary winding, this voltage peak will multiply by n
2/ n
1Here, L
1Be the inductance of elementary winding, L
2It is the inductance of secondary winding.n
1And n
2Represent the number of turn of elementary winding and secondary winding respectively.By square wave current is provided, the switching of the sense of current is so fast, so that voltage peak can be at several kilovolts the order of magnitude.
Practical embodiments of the present invention can comprise the transformer of any number and the lamp of any number, and this depends on the power that current source is actual available.In fact the number of lamp can be any number of from 1 to 50.The number of transformer can equal the number of lamp, perhaps can be less than the number of lamp, as long as be proved to be more convenient.The frequency of square wave current can be several hertz up to several KHz or the frequency of any one between the megahertz even.Usually determine this frequency according to the characteristic of lamp.
The embodiment of a reality that is used to operate 7 20 watts, 100 volts gaseous discharge lamp comprises 7 transformers, for example referring to Fig. 1.The heap(ed) capacity of current source is 150 watts, and 150 hertz square wave current is provided.Electric current in the elementary winding is about 3 amperes.Lamp current is about 200 milliamperes.Elementary winding is 1 volt with the ratio of secondary winding: 24 volts.Switching frequency is about 220 hertz.The impedance of primary winding is about 12 milihenries, and the switching of the sense of current needs 10 microseconds approximately.Because current amplitude is about 2.6 amperes, so the voltage peak that produces when connecting lamp is estimated as about 6.24 kilovolts.In practice, voltage peak is proved to be and is about 4.5 kilovolts, and it enough starts the majority of gas discharge lamp.
In another actual embodiment, said system comprises a lamp of 70 watts, 100 volts that links to each other with a secondary winding and 150 watts of linking to each other with another secondary winding, 100 volts lamp.The heap(ed) capacity of current source is 150 watts, and the electric current by elementary winding is about 3 amperes.For 70 watts lamp, the ratio of elementary winding and secondary winding is 17.5 volts: 100 volts; For 150 watts lamp, the ratio of elementary winding and secondary winding is 35 volts: 100 volts.That is, transformation ratio is to decide according to the lamp that links to each other with secondary winding.
Compared with prior art, several improvement are provided according to system of the present invention.Said system comprises less parts, therefore makes it more firm, and cost is effective more.Because the sense of current is instantaneous switching basically, thereby the combination of the elementary winding of square wave current and transformer, the voltage peak that provided on lamp before the lamp of lighting a fire is enough high, can light a fire low-pressure gaseous discharge lamp and high-voltage gas discharging light the two.Said voltage peak can be about 1 kilovolt and 4-5 kilovolt respectively.Therefore, the present invention no longer needs reponse system to come to control according to the power of lamp the output of power supply.The oscillator that is used to control the switching frequency of switch shown in Figure 4 just can be satisfactory.In addition, regulate the amplitude of the square wave current that provides to elementary winding, the power output of having regulated (dims) lamp.
The scope of switching frequency be 50 hertz to 1300 KHz, preferred range be 90 hertz to 500 KHz.These frequencies are proved to be useful because they be suitable for driving low-pressure gaseous discharge lamp and high-voltage gas discharging light the two.Preferred frequency is relatively low, and 50 hertz to 10 KHz, to prevent that acoustic resonance takes place in high-voltage gas discharging light.If frequency is higher than certain level, acoustic resonance will be subjected to damping.Can also use higher relatively frequency, its scope is that 100 KHz are to 1300 KHz.In order to drive low-pressure lamp (for example fluorescent lamp), can use 50 hertz of whole frequency ranges to 1300 KHz.50 hertz or be higher than 50 hertz frequency and be proved to be enough height, can prevent the visible flicker of human eye.
Said lamp can comprise low-pressure gaseous discharge lamp, for example fluorescence, SOX, neon, argon and sulphur lamp.Said lamp further also can comprise high-voltage gas discharging light, for example mercury vapor light, sodium vapor lamp, no mercury lamp, metal halid lamp, xenon arc lamp, ceramic discharge metal halide lamp, quartzy high-intensity discharge lamp or the like.
By providing electric current to elementary winding, the disconnection of any one lamp or connection do not influence the voltage on other lamp.Also have, owing to provide electric current to elementary winding, corresponding lamp can have different lamp power.
The invention is not restricted to above-mentioned exemplary embodiments.Within the scope of the appended claims, it is contemplated that out the various improvement of these embodiment.
Claims (15)
1, be used to operate the system of at least one gaseous discharge lamp, comprise:
-square wave current source is used to produce the electric current that is essentially square wave; And
-have at least one transformer of elementary winding and at least one secondary winding;
-described at least one secondary winding can be connected at least one gaseous discharge lamp;
-square wave current source is directly coupled to the elementary winding of described at least one transformer, is used for directly providing square wave current to it.
2, the system of claim 1, said system comprises at least two transformers, the mutually direct series coupled of the elementary winding of these transformers.
3, claim 1 or 2 system, wherein: each gaseous discharge lamp is connected to corresponding secondary winding.
4, according to any one described system in the aforementioned claim, wherein: described at least one transformer comprises autotransformer.
5, the system of claim 1, wherein: square wave current source comprises full bridge structure, and full bridge structure comprises 4 switches, and these switches all are connected to DC power supply.
6, the system of claim 5 comprises controller, and controller is connected to switch, is used for the switching frequency of control switch.
7, the system of claim 6, wherein: the scope of switching frequency be 50 hertz to 1300 KHz, preferred range at 90 hertz to 500 KHz.
8, the system of claim 1 comprises at least two gaseous discharge lamps.
9, the system of claim 8, wherein: the lamp power of a gaseous discharge lamp is different from the lamp power of another gaseous discharge lamp.
10, claim 8 or 9 system, wherein: two gaseous discharge lamps are connected to a secondary winding of described at least one transformer.
11, the system of claim 1, wherein: current source comprises the device of the amplitude that is used to regulate square wave current.
12, the system of claim 1, wherein: described at least one lamp comprises halide gas discharge lamp.
13, claim 1 or 12 system, wherein: described at least one lamp comprises fluorescent lamp.
14, the method that is used for operating gas discharge lamps, said method comprises the steps:
-at least one transformer with elementary winding and secondary winding is provided;
-connect at least one gaseous discharge lamp to secondary winding;
-directly provide electric current from current source to elementary winding;
-switch current direction, so that because the voltage peak on elementary winding, and therefore owing to the voltage peak on the secondary winding, and described at least one gaseous discharge lamp of lighting a fire.
15, according to the use of any one described system among the claim 1-14.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05111655 | 2005-12-02 | ||
| EP05111655.6 | 2005-12-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101322445A true CN101322445A (en) | 2008-12-10 |
Family
ID=37909732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800453221A Pending CN101322445A (en) | 2005-12-02 | 2006-11-16 | System and method for operating a gas discharge lamp and method of use thereof |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1958487A1 (en) |
| JP (1) | JP2009517826A (en) |
| CN (1) | CN101322445A (en) |
| WO (1) | WO2007063444A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102576648A (en) * | 2009-10-09 | 2012-07-11 | 皇家飞利浦电子股份有限公司 | High efficiency lighting assembly |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8339044B2 (en) | 2010-12-28 | 2012-12-25 | General Electric Company | Mercury-free ceramic metal halide lamp with improved lumen run-up |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4972126A (en) * | 1985-05-09 | 1990-11-20 | Nilssen Ole K | Ballasting system for fluorescent lamps |
| US6300722B1 (en) * | 1997-11-05 | 2001-10-09 | Jorge M. Parra | Non-thermionic ballast-free energy-efficient light-producing gas discharge system and method |
| US6194845B1 (en) * | 1999-11-03 | 2001-02-27 | Osram Sylvania Inc. | Ballasts with tapped inductor arrangements for igniting and powering high intensity discharge lamps |
| US6597126B1 (en) * | 2000-05-25 | 2003-07-22 | Jorge M. Parra | High-frequency, ballast-free, non-thermionic fluorescent lighting system for cold environments |
| US7514879B2 (en) * | 2003-11-25 | 2009-04-07 | Purespectrum, Inc. | Method and system for driving a plasma-based light source |
-
2006
- 2006-11-16 WO PCT/IB2006/054290 patent/WO2007063444A1/en active Application Filing
- 2006-11-16 EP EP06821470A patent/EP1958487A1/en not_active Withdrawn
- 2006-11-16 JP JP2008542878A patent/JP2009517826A/en active Pending
- 2006-11-16 CN CNA2006800453221A patent/CN101322445A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102576648A (en) * | 2009-10-09 | 2012-07-11 | 皇家飞利浦电子股份有限公司 | High efficiency lighting assembly |
| CN102576648B (en) * | 2009-10-09 | 2016-01-06 | 皇家飞利浦电子股份有限公司 | There is the high efficiency illumination assembly exchanging and drive metal halide lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009517826A (en) | 2009-04-30 |
| EP1958487A1 (en) | 2008-08-20 |
| WO2007063444A1 (en) | 2007-06-07 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |