CN1933693A - Electric circuit device for driving high voltage discharge lamp - Google Patents
Electric circuit device for driving high voltage discharge lamp Download PDFInfo
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- CN1933693A CN1933693A CNA200510098919XA CN200510098919A CN1933693A CN 1933693 A CN1933693 A CN 1933693A CN A200510098919X A CNA200510098919X A CN A200510098919XA CN 200510098919 A CN200510098919 A CN 200510098919A CN 1933693 A CN1933693 A CN 1933693A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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Abstract
A circuit device used for driving high voltage discharge lamp consists of DC power supply; DC-AC bridged unit; coupled ignition unit and control circuit including low frequency oscillator, PWN controller and driving circuit.
Description
Technical field
The present invention relates to the control device of high-pressure discharge lamp.
Background technology
High-pressure discharge lamp such as high-pressure sodium lamp, metal halide lamp, is a class high efficiency light source commonly used.Use high-frequency circuit apparatus (operating frequency is greater than 20KHz) to light and control the work of high-pressure discharge lamp in recent years, more and more be subjected to people's welcome, because the size and the weight of high frequency running having significantly reduced circuit arrangement.
But during the high frequency running, the audio frequency covibration appears in high-pressure discharge lamp easily, produces tedious arc flicker and power shakiness.In December, 2002, the patent No. of Granted publication on the 25th was 95192614.4 Chinese patent, disclosed a kind of circuit arrangement, this circuit arrangement is by the audio frequency resonance with the arc light of avoiding discharging of the operating frequency that detects relevant circuit parameter and change its bridge circuit, and changes the busbar voltage of supplying with bridge circuit and realize the stable of power by detecting lamp power and control booster converter.The complex structure of this circuit arrangement is difficult to realize miniaturization and cost degradation.
Summary of the invention
The objective of the invention is to propose a kind of improved circuit arrangement that is used to drive high-pressure discharge lamp, simplify the structure of circuit arrangement, reduce cost, improve the reliability of work.
The circuit arrangement that is used to drive high-pressure discharge lamp of the present invention has
One DC power supply;
One DC-AC bridge-type device becomes high-frequency energy to the power conversion of DC power supply output;
One coupling igniter is coupled to described high-pressure discharge lamp to the high-frequency energy of DC-AC bridge-type device output, and initial igniting high pressure is provided;
One is used to control the control circuit of DC-AC bridge-type device work,
It is characterized in that, described control circuit comprises low-frequency oscillator, PWN controller and drive circuit, the output signal of its control circuit is all high-frequency signals of time to time change of pulse duration and frequency, the variation of its pulse duration is controlled by the PWN controller by the feedback signal from lamp load, and the variation of its frequency is carried out frequency modulation(FM) by low frequency signal that low-frequency oscillator produced to the high-frequency signal that oscillator produced of PWN controller inside and controlled.
The frequency of described low-frequency oscillator is lower than 10kHz, is preferably located between 200Hz and the 1kHz.
The centre frequency of the oscillator of described PWN controller inside is lower than 500kHz, is preferably located between 30kHz and the 250kHz.
Described frequency modulation(FM) is to realize by by low frequency signal that low-frequency oscillator produced one being controlled by the capacitance that inserts the variable capacitance diode on the oscillator that electric capacity is connected in PWN controller inside.The low frequency signal that described low-frequency oscillator produced is a sine wave signal.
The present invention has following good effect:
1, because the signal that the control circuit of control DC-AC bridge-type device work is exported is all high-frequency signals of time to time change of pulse duration and frequency, therefore the power of lamp load is stablized by the continuous adjustment of pulse duration, and the arc light of lamp load flicker simultaneously or audio frequency resonance obtain decay by the continuous variation of operating frequency.
2, because the control circuit of control DC-AC bridge-type device work comes down on the basis of the integrated controll block of a PWN, additional a small amount of circuit forms, and has simplified the structure of circuit, has reduced cost, has improved the reliability of work.
Description of drawings
Fig. 1 is that the block diagram of an embodiment of circuit arrangement of the present invention is described.
Fig. 2 is the frequency modulation(FM) schematic diagram of the control circuit of one embodiment of the present of invention.
Embodiment
Be illustrated below in conjunction with embodiment and accompanying drawing:
Fig. 1 shows the block diagram of an embodiment of circuit arrangement of the present invention and describes.DC power supply 1 is a direct voltage source, for example be the direct voltage source of the utility alternating current source of a 50Hz or 60Hz through the bridge rectifier acquisition, an or direct voltage source that obtains through input filtering, bridge rectifier and the conversion of process power factor, or direct voltage source that low-voltage dc power supply (for example 12V DC power supply) is formed by boosting inverter.DC-AC bridge-type device 2 is the known bridge-type convertor circuit of those skilled in the art devices, for example be one main by four full-bridge convertor circuit devices that power switch component constituted, or one is main by two half-bridge convertor circuit devices that power switch component constituted.Coupling igniter 3 also is that those skilled in the art is known, for example is the loop that is made of inductance and electric capacity, the high-frequency energy that can be coupled, and can utilize the high pressure that resonance produced of inductance and electric capacity to provide initial igniting high pressure for lamp load; Or the loop that is constituted by inductance, electric capacity, resistance and triggering element, the high-frequency energy that can be coupled, and can utilize the triggering work that triggers element and the coupling of inductance element to provide initial igniting high pressure for lamp load.
Be used to control the control circuit 5 of DC-AC bridge-type device 2 work, comprise low-frequency oscillator 6, PWN controller 7 and drive circuit 8.Low-frequency oscillator 6 produces an oscillating signal, and its frequency of oscillation is lower than 10kHz, is preferably located between 200Hz and the 1kHz, and the waveform of its oscillator signal is preferably sinusoidal wave.PWN controller 7 is made of integrated controll block of a PWN and peripheral circuit, the integrated controll block type of PWN is a lot, this is a called optical imaging, as SG3524, TL494, MC34060 etc., there are an oscillator or clock circuit in the inside of the integrated controll block of its PWN, and people utilize the integrated controll block of PWN to carry out the adjustment of pulse duration usually, and at this moment the frequency of oscillation of its inner oscillator is invariable, and in the use of this device, its frequency of oscillation is constantly to change near a certain centre frequency.Drive circuit 8 mainly carries out power amplification to drive the work of DC-AC bridge-type device 2 to the high-frequency signal of PWN controller 7 outputs.
In control circuit 5,, control the pulse duration of its output signal by PWN controller 7 from feedback signal UL, the IL of lamp load; The low frequency signal that low-frequency oscillator 6 produced carries out frequency modulation(FM) to the high-frequency signal that oscillator produced of PWN controller 7 inside and controls the operating frequency of its output signal.Therefore the output signal of PWN controller 7 is all high-frequency signals of time to time change of a pulse duration and frequency.This output signal drives by drive circuit 8 or control DC-AC bridge-type device 2 carries out high-frequency work.Thereby the power of high-pressure discharge lamp 4 is stablized by the continuous adjustment of pulse duration, made arc light flicker that high-pressure discharge lamp 4 may occur or audio frequency resonance obtain decay by the continuous variation of operating frequency.
Fig. 2 shows the frequency modulation(FM) schematic diagram of the control circuit that is a preferred embodiment of the present invention.In Fig. 2: OSC is the oscillator of PWN controller 7 inside, the 6th, low-frequency oscillator, C1 is a coupling capacitance, and C2 is a high-frequency bypass capacitor, and D is a variable capacitance diode, CT is the external capacitor of oscillator OSC, RT is the outer meeting resistance of oscillator OSC, and R1, R2 are divider resistances, and L is a high frequency choke coil, C3 inserts electric capacity, and E is a low-tension supply.As shown in Figure 2, variable capacitance diode D inserts capacitor C 3 by one and is connected on the oscillator OSC of PWN controller 7 inside, make the frequency of oscillation of oscillator OSC not only relevant, also be subjected to the constantly influence of variation of capacitance of variable capacitance diode D with external capacitor CT, outer meeting resistance RT.Low-tension supply E gives reverse biased of variable capacitance diode D by divider resistance R1, R2, the low frequency signal that low-frequency oscillator 6 is produced puts on the variable capacitance diode D by coupling capacitance C1 and through high frequency choke coil L, the capacitance that makes variable capacitance diode D changed with the cycle of low frequency signal, the output frequency cycle that the cycle of this capacitance changes the oscillator OSC that causes PWN controller 7 inside changes, and promptly realizes frequency modulation(FM).
According to spirit of the present invention and explanation, those skilled in the art can design different embodiment in its scope.
Claims (5)
1, is used to drive the circuit arrangement of high-pressure discharge lamp, has
One DC power supply (1);
One DC-AC bridge-type device (2) becomes high-frequency energy to the power conversion of DC power supply (1) output;
One coupling igniter (3) is coupled to described high-pressure discharge lamp (4) to the high-frequency energy of DC-AC bridge-type device (2) output, and initial igniting high pressure is provided;
One is used to control the control circuit (5) of DC-AC bridge-type device (2) work,
It is characterized in that, described control circuit (5) comprises low-frequency oscillator (6), PWN controller (7) and drive circuit (8), the output signal of its control circuit (5) is all high-frequency signals of time to time change of pulse duration and frequency, the variation of its pulse duration is controlled by PWN controller (7) by the feedback signal (UL, IL) from lamp load, and the high-frequency signal that the low frequency signal that the variation of its frequency is produced by low-frequency oscillator (6) is produced the inner oscillator (OSC) of PWN controller (7) carries out frequency modulation(FM) and controls.
2, circuit arrangement as claimed in claim 1 is characterized in that, the frequency of described low-frequency oscillator (6) is lower than 10kHz, is preferably located between 200Hz and the 1kHz.
3, circuit arrangement as claimed in claim 1 or 2 is characterized in that, the centre frequency of the oscillator (OSC) that described PWN controller (7) is inner is lower than 500kHz, is preferably located between 30kHz and the 250kHz.
4, as the described circuit arrangement of one of above-mentioned claim, it is characterized in that described frequency modulation(FM) is by the low frequency signal that produced by low-frequency oscillator (6) one to be controlled and realizes by inserting capacitance that electric capacity (C3) is connected in the variable capacitance diode (D) on the inner oscillator (OSC) of PWN controller (7).
As the described circuit arrangement of one of above-mentioned claim, it is characterized in that 5, the low frequency signal that described low-frequency oscillator (6) is produced is a sine wave signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200510098919XA CN1933693A (en) | 2005-09-14 | 2005-09-14 | Electric circuit device for driving high voltage discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200510098919XA CN1933693A (en) | 2005-09-14 | 2005-09-14 | Electric circuit device for driving high voltage discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1933693A true CN1933693A (en) | 2007-03-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200510098919XA Pending CN1933693A (en) | 2005-09-14 | 2005-09-14 | Electric circuit device for driving high voltage discharge lamp |
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| CN (1) | CN1933693A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102498753A (en) * | 2009-07-02 | 2012-06-13 | 路易吉·德西代拉托 | Power factor correction method and device for discharge lamps, for example high pressure sodium lamps |
| WO2012119473A1 (en) * | 2011-03-09 | 2012-09-13 | 深圳市飞狮电子工业有限公司 | Power frequency modulation high frequency hid electronic ballast |
| CN103327713B (en) * | 2012-03-21 | 2017-10-24 | 精工爱普生株式会社 | Lighting apparatus for discharge lamp, discharge lamp lighting method and projector apparatus |
-
2005
- 2005-09-14 CN CNA200510098919XA patent/CN1933693A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102498753A (en) * | 2009-07-02 | 2012-06-13 | 路易吉·德西代拉托 | Power factor correction method and device for discharge lamps, for example high pressure sodium lamps |
| WO2012119473A1 (en) * | 2011-03-09 | 2012-09-13 | 深圳市飞狮电子工业有限公司 | Power frequency modulation high frequency hid electronic ballast |
| CN102685997A (en) * | 2011-03-09 | 2012-09-19 | 深圳市飞狮电子工业有限公司 | High-frequency HID (High Intensity Discharge) electronic ballast with modulated power frequency |
| CN102685997B (en) * | 2011-03-09 | 2014-09-10 | 深圳市飞狮电子工业有限公司 | High-frequency HID (High Intensity Discharge) electronic ballast with modulated power frequency |
| CN103327713B (en) * | 2012-03-21 | 2017-10-24 | 精工爱普生株式会社 | Lighting apparatus for discharge lamp, discharge lamp lighting method and projector apparatus |
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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 |