CN1564644A - Electronic ballast of hihg strength gas discharging light - Google Patents
Electronic ballast of hihg strength gas discharging light Download PDFInfo
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- CN1564644A CN1564644A CNA2004100172292A CN200410017229A CN1564644A CN 1564644 A CN1564644 A CN 1564644A CN A2004100172292 A CNA2004100172292 A CN A2004100172292A CN 200410017229 A CN200410017229 A CN 200410017229A CN 1564644 A CN1564644 A CN 1564644A
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- 238000007599 discharging Methods 0.000 title 1
- 238000001514 detection method Methods 0.000 claims description 25
- 238000004804 winding Methods 0.000 claims description 7
- 238000010304 firing Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
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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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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The electronic ballast used for high intensity gas discharge lamp consists of: a combined type circuit for correcting single-stage power factor and generating low frequency square wave signal, a voltage and current testing circui, a constant power control circuit. The voltage and current testing signal obtained from low frequency square wave circuit is inputted into the constant power control circuit to generate a switch-driving signal with a certain pulse width. The constlant power inputted to the lamp is controlled through controlling the duty radio of high frequency switch in the single-stage power factor correction circuit.
Description
Technical field:
The present invention relates to a kind of electric ballast, is the electric ballast about high intensity discharge lamps such as high-pressure sodium lamp, metal halide lamps specifically.
Background technology:
In recent years, high-intensity gas discharge lamp is owing to its high-luminous-efficiency, long-life have obtained application more and more widely.Traditional inductance type ballast volume is big and heavy, and the requirement of ballast miniaturization has been satisfied in the application of high-frequency electronic ballast.But the high-intensity gas discharge lamp acoustic resonance phenomenon that (being generally tens kHz to hundreds of kHz) has under the high frequency operation makes the application of high-frequency electronic ballast be restricted.Acoustic resonance can cause lamp electric arc shakiness when taking place, and makes that light output is unstable, glimmers, rolls, and has a strong impact on illuminating effect, and this phenomenon is especially serious in the low-power high-strength electronic amperite of gas-discharge lamp.The method that overcomes acoustic resonance is generally based on following principle: the frequency that 1. drives high-intensity gas discharge lamp drops on outside the acoustic resonance frequency; 2. the high-frequency energy that drives the high strength Gas lamp is lower than the threshold values energy that acoustic resonance takes place.Based on above 2 points, the method that overcomes acoustic resonance can reduce: 1. frequency-selecting operation makes high-intensity gas discharge lamp operate in the frequency window of no acoustic resonance; 2. frequency modulation(FM) method; 3. the hyperfrequency method of lighting a lamp; 4. the low-frequency square-wave method of lighting a lamp; 5. the high frequency square wave method of lighting a lamp.
Adopt the low-frequency square-wave method of lighting a lamp, the energy that is input on the lamp is a steady state value, promptly not have the periodic energy that changes, and therefore is a kind of method that overcomes acoustic resonance of reliably, easily going, and is accepted extensively by industry.
Three grades of traditional low-frequency square-wave circuit are made up of the low frequency inverse cascade of power factor correction stage, direct current DC converting level and generation low-frequency square-wave, though this circuit can effectively overcome the generation of acoustic resonance phenomenon, but, exist shortcomings such as complex structure, components and parts are many, cost height because circuit forms by three grades.
Summary of the invention
The composite type electronic ballast of high intensity gas discharge lamp that the purpose of this invention is to provide a kind of single-stage has significantly been simplified circuit structure in this ballast, and has reduced the number of switch.
The present invention program is: a kind of electronic ballast of high intensity gas discharge lamp, comprise that knockdown single-level power factor correction and low-frequency square-wave signal produce circuit (3), the firing circuit (4) of high-voltage pulse signal is provided for lamp (L), it also comprises voltage and current detection circuit (5), constant-power control circuit (6), HF switch tube drive circuit (7) and low frequency drive signal generator (8).Knockdown single-level power factor correction and low-frequency square-wave signal produce circuit (3) and comprise a HF switch pipe (S1), two low frequency switching tubes (S2) and (S3), the transformer (T) that two secondary windings are arranged, a common point in the middle of being connected, two secondary windings is arranged, secondary at transformer can form two current circuits, lamp is connected on the common branch of two current circuits, wherein each secondary loop seals in a switching tube, and making two switching tubes alternate conduction under the low frequency state of 100 to one KHz, duty ratio respectively accounts for 50%.The power output of this electric ballast is recently to control by the duty of regulating described HF switch pipe (S1).Knockdown single-level power factor correction and low-frequency square-wave signal produce circuit (3) and comprise the electric current and voltage test point that is connected to voltage and current detection circuit (5).Voltage and current detection circuit (5) is connected with described electric current and voltage test point, through amplifier (A1), (A2) with resistive element that amplifier (A1), (A2) link to each other after, obtain the modulating voltage current detection signal respectively at the output of amplifier (A1), (A2).Described constant-power control circuit (6) is connected with described modulating voltage current detection signal, and this constant-power control circuit (6) comprises a proportional amplifier, a proportional and integral controller and a comparator; The electric current and voltage detection signal links to each other with proportional amplifier through resistance, the output of this proportional amplifier links to each other through an end of resistance and proportional and integral controller, the output of proportional and integral controller links to each other with the anode of comparator, obtains the drive pulse signal of HF switch pipe at the output of comparator.Described low frequency drive signal generator (8) comprises that chip NE555, inverter N hold element with the group that links to each other with NE555.
Electronic ballast of high intensity gas discharge lamp of the present invention comprises that Electromagnetic interference filter, rectifier bridge, knockdown single-level power factor correction and low-frequency square-wave signal produce circuit, firing circuit, also comprise voltage and current detection circuit, constant-power control circuit, drive circuit and low frequency drive signal generator.The voltage detection signal and the current detection signal that obtain from the low-frequency square-wave circuit are input to constant-power control circuit, produce the certain switching drive signal of pulsewidth, control the duty ratio of the HF switch pipe of single-stage power factor correcting circuit then by drive circuit, control the power invariability that is input on the lamp.
The purpose that the present invention adopts knockdown single-level circuit to reach power factor correction has been got back simultaneously and has been driven the low-frequency square-wave signal of high-intensity gas discharge lamp.
The single-level circuit of combinations thereof formula has adopted the technology of single-level power factor correction, wherein the transformer secondary of single-stage power factor correction circuit is wound with two windings, a common point in the middle of being connected, two secondary windings is arranged, secondary at transformer can form two current circuits like this, lamp is connected on the common branch of two current circuits, wherein each secondary loop seals in a switching tube, and make two switching tubes alternate conduction under 100～1000 hertz of low frequency states, duty ratio respectively accounts for 50%, such two secondary current loop alternations can obtain a low-frequency square-wave signal on lamp.
The present invention is in the same place single-stage power factor correcting circuit and the low-frequency square-wave combination of circuits that drives lamp, and sort circuit is arranged and is suitable for the high-intensity gas discharge lamp of driving power less than 200W.Wherein the inductance of single-stage power factor correcting circuit input is operated in the discontinuous current conduction mode, under the certain situation of fixed-frequency duty ratio, just can make the input AC current waveform follow the variation of input ac voltage waveform naturally and change like this, thereby reach the purpose of power factor correction without any need for FEEDBACK CONTROL.
Electronic ballast of high intensity gas discharge lamp of the present invention, has higher power factor, can reduce harmonic pollution effectively to electrical network, adopted permanent power control simultaneously, make that the power output of electric ballast can be along with the variation of the characteristic of lamp and change, guarantee the output light efficiency of lamp, strengthened the stability of system.Adopt low-frequency square-wave signal to drive high-intensity gas discharge lamp, noiseless resonance phenomena takes place during operation.And adopt the one-level combined circuit both to realize that the purpose of power factor correction has been got back and drive the low-frequency square-wave signal of high-intensity gas discharge lamp, simple with traditional three grades of circuit structure compared, as to have reduced components and parts number, reduced cost.
Description of drawings
Fig. 1 is the circuit structure diagram of electronic ballast of high intensity gas discharge lamp;
Fig. 2 is a kind of practical circuit that composite type single-level power factor correction and low-frequency square-wave produce circuit;
Fig. 3 is a low frequency switching tube drive signal sequential chart;
Fig. 4 is a kind of physical circuit example of low frequency drive signal generator;
Equivalent circuit diagram when Fig. 5 is switching tube S2 conducting, S3 shutoff;
Equivalent circuit diagram when Fig. 6 is switching tube S2 shutoff, S3 conducting;
Fig. 7 is a kind of physical circuit example of voltage, current detection circuit;
Fig. 8 is a kind of physical circuit example of permanent power control.
Embodiment
With reference to Fig. 1, electronic ballast of high intensity gas discharge lamp of the present invention comprises electromagnetic interference filter circuit 1, rectifier bridge 2, knockdown single-level power factor correction and low-frequency square-wave signal produce circuit 3, high-intensity gas discharge lamp L, the firing circuit 4 of high-voltage pulse signal being provided for lamp L, voltage, current detection circuit 5, constant-power control circuit 6, HF switch tube drive circuit 7 and low frequency drive signal generator 8.Behind voltage, current detection circuit 5, be input to constant-power control circuit 6 from the detected voltage of lamp L, current signal, by the pulsewidth of modulation constant-power control circuit 6 output drive signals, the feasible power substantially constant that outputs on the lamp L.
Figure 2 shows that composite type single-level power factor correction and low-frequency square-wave produce a kind of practical circuit of circuit.It comprises Electromagnetic interference filter, rectifier bridge Br, inductance L B, electrochemical capacitor CB, HF switch pipe S1, two low frequency switching tube S2, S3, four diode D1, D2, D3, D4, transformer T with two secondary windings, two high frequency capacitance C1, C2, ignition transformer secondary inductance Lm, lamp L and lamp current detect resistance R 1, R2.Positive pole another terminating diode D1 of inductance L B one termination rectifier bridge Br and the anode of D2, the negative electrode of diode D1 connects the positive pole of electrochemical capacitor CB and an end on the former limit of transformer T, the negative electrode of diode D2 connects the drain electrode of the other end and the switching tube S1 on the former limit of transformer T, and the negative pole of the negative pole of rectifier bridge and electrochemical capacitor CB and the source electrode of switching tube S1 are connected on one.The anode of the last terminating diode D3 of the secondary of transformer T, the negative electrode of diode D3 connects the drain electrode of an end and the switching tube S2 of high frequency capacitance C1, the source electrode of switching tube S2 connects the end of inspection leakage resistance R1, the end of the other end of inspection leakage resistance R1 and inspection leakage resistance R2 and the end of lamp L link together as the zero potential reference point, the other end tape splicing of lamp L has the end of the inductance L m of igniting secondary, the other end of another termination high frequency capacitance C1 of igniting inductance L m, centre one end of the end of C2 and transformer T secondary, the drain electrode of another termination switching tube S3 of inspection leakage resistance R2, the source electrode of switching tube S3 connects the anode of diode D4, and the negative electrode of diode D4 connects the lower end of the other end and the transformer secondary of high frequency capacitance C2.The tie point B of the anode of the tie point A of the drain electrode of the negative electrode of diode D3 and switching tube S2 and switching tube S3 and diode D4 is as the voltage signal test point, the tie point D of the tie point C of the source electrode of switching tube S2 and inspection leakage resistance R1 and the drain electrode of inspection leakage resistance R2 and switching tube S3 is as the current signal test point, and voltage signal test point A, B and current signal detect believes that the signal of telecommunication that some C, D obtain is input to voltage and current detection circuit 5.
Figure 3 shows that the drive signal sequential chart of low frequency switching tube S2, S3, switching tube S2, S3 are operated under the low frequency state and (are generally the hundreds of hertz), and two complementary conductings of switching tube, duty ratio is 50%, a very little dead band is arranged during two switching tube changes of current, common to prevent two switching tubes.This circuit has two kinds of operating states:
1, switching tube S2 conducting, S3 turn-offs.At this moment, the loop of switching tube S3, diode D4, high frequency capacitance C2, igniting inductance L m, lamp L and inspection leakage resistance R2 composition is in blocking state.The operating circuit of this moment can be reduced to circuit shown in Figure 5, and wherein switching tube S1 is operated in the HF switch state, and this circuit is the single-stage power factor correcting circuit that is combined by boost type DC DC converter and inverse-excitation type dc dc converter.The sense of current that flows through on lamp L under this operating state is from right to left.
2, switching tube S3 conducting, S2 turn-offs.At this moment, the loop of diode D3, switching tube S2, inspection leakage resistance R1, lamp L, igniting inductance L m and high frequency capacitance C1 composition is in blocking state.This moment, operating circuit can be reduced to circuit shown in Figure 6, and wherein switching tube S1 is operated in the HF switch state, and this circuit is the single-stage power factor correcting circuit that is combined by boost type DC DC converter and inverse-excitation type dc dc converter.The sense of current that flows through on lamp L under this operating state is from left to right.As fully visible, what obtain on the lamp L is a low-frequency square-wave signal, the acoustic resonance phenomenon can not take place.
Figure 4 shows that a kind of physical circuit example of low frequency drive signal generator, it is by chip NE555 and corresponding group holds element and inverter N forms.From the direct driving switch pipe S2 of the low frequency drive signal of 3 pin of chip NE555 output, and the output signal of 3 pin is passed through inverter N and can be used for driving switch pipe S3 after anti-phase.
Figure 7 shows that voltage, current detection circuit, it is by amplifier A1, and amplifier A2 and corresponding resistive element constitute.Wherein A, B, C, D point link to each other with A, B, C, D point among Fig. 2 respectively.The A point is received the anode of amplifier A1 after resistance R 5, R6 dividing potential drop, the B point is received the negative terminal of amplifier through resistance R 3, jumps to the output E point of amplifier A1 then by resistance R 4.The C point is received the anode of amplifier A2 after resistance R 9, R10 dividing potential drop, the D point is received the negative terminal of amplifier A2 through resistance R 7, jumps to the output F point of amplifier A2 then by resistance R 8.Because A point current potential is the twice of lamp voltage amplitude when switching tube S2 shutoff, S3 conducting, B point current potential is zero; Switching tube S2 conducting, S3 by the time B point current potential be the twice of negative lamp voltage amplitude, A point current potential is zero, therefore A point current potential deducts the twice that B point current potential is lamp voltage amplitude, so can be by A point and B point current potential are sampled, be input to amplifier A1 then, obtain the modulating voltage detection signal at the E point through subtraction.Because when switching tube S2 conducting or switching tube S3 conducting, the electric current that flows through on sampling resistor R1 or the R2 is lamp current, so can be input to amplifier A2 then by C point and D point current potential are sampled, can obtain the lamp current detection signal at the F point through subtraction.
Figure 8 shows that the circuit diagram of permanent power control, it is by amplifier A3, and amplifier A4, comparator P hold element with corresponding group and constitute.Wherein E point and F point respectively with Fig. 6 in the E point link to each other with the F point.The voltage detection signal that E is ordered is received the anode of amplifier A3 through resistance R 11, the current detection signal that F is ordered is received the anode of amplifier A3 through resistance R 12, the negative terminal of amplifier A3 jumps to the output of amplifier A3 through resistance R 14 through resistance R 13 ground connection, the weighted sum that is the voltage and current detection signal is amplified by amplifier A3 ratio, receive the negative terminal of amplifier A4 then through resistance R 15, compare with the reference voltage V ref of amplifier A4 anode, through by amplifier A4 be connected across resistance R 16 between amplifier A4 negative terminal and the output, output one direct current signal behind the proportional and integral controller that capacitor C 3 is formed, this signal is input to the anode of comparator P and the sawtooth waveforms of comparator P negative terminal compares, and obtains drive pulse signal at the output of comparator P.
Claims (7)
1, a kind of electronic ballast of high intensity gas discharge lamp, comprise that knockdown single-level power factor correction and low-frequency square-wave signal produce circuit (3), the firing circuit (4) of high-voltage pulse signal is provided for lamp (L), it is characterized in that: it also comprises voltage and current detection circuit (5), constant-power control circuit (6), HF switch tube drive circuit (7) and low frequency drive signal generator (8).
2, according to the described electronic ballast of high intensity gas discharge lamp of claim 1, it is characterized in that: described knockdown single-level power factor correction and low-frequency square-wave signal produce circuit (3) and comprise a HF switch pipe (S1), two low frequency switching tubes (S2) and (S3), the transformer (T) that two secondary windings are arranged, a common point in the middle of being connected, two secondary windings is arranged, secondary at transformer can form two current circuits, lamp is connected on the common branch of two current circuits, wherein each secondary loop seals in a switching tube, and making two switching tubes alternate conduction under the low frequency state of 100 to one KHz, duty ratio respectively accounts for 50%.
3, according to claim 1 and 2 described electronic ballast of high intensity gas discharge lamp, it is characterized in that: the power output of this electric ballast is recently to control by the duty of regulating described HF switch pipe (S1).
4, according to claim 1 and 2 described electronic ballast of high intensity gas discharge lamp, it is characterized in that: described knockdown single-level power factor correction and low-frequency square-wave signal produce circuit (3) and comprise the electric current and voltage test point that is connected to voltage and current detection circuit (5).
5, according to claim 1 and 4 described electronic ballast of high intensity gas discharge lamp, it is characterized in that: described voltage and current detection circuit (5) is connected with described electric current and voltage test point, through amplifier (A1), (A2) with resistive element that amplifier (A1), (A2) link to each other after, obtain the modulating voltage current detection signal respectively at the output of amplifier (A1), (A2).
6, according to the described electronic ballast of high intensity gas discharge lamp of claim 1, it is characterized in that: described constant-power control circuit (6) is connected with described modulating voltage current detection signal, and this constant-power control circuit (6) comprises a proportional amplifier, a proportional and integral controller and a comparator; The electric current and voltage detection signal links to each other with proportional amplifier through resistance, the output of this proportional amplifier links to each other through an end of resistance and proportional and integral controller, the output of proportional and integral controller links to each other with the anode of comparator, obtains the drive pulse signal of HF switch pipe at the output of comparator.
7, according to the described electronic ballast of high intensity gas discharge lamp of claim 1, it is characterized in that: described low frequency drive signal generator (8) comprises that chip NE555, inverter N hold element with the group that links to each other with NE555.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100172292A CN100553397C (en) | 2004-03-22 | 2004-03-22 | A kind of electronic ballast of high intensity gas discharge lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100172292A CN100553397C (en) | 2004-03-22 | 2004-03-22 | A kind of electronic ballast of high intensity gas discharge lamp |
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| Publication Number | Publication Date |
|---|---|
| CN1564644A true CN1564644A (en) | 2005-01-12 |
| CN100553397C CN100553397C (en) | 2009-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100172292A Expired - Fee Related CN100553397C (en) | 2004-03-22 | 2004-03-22 | A kind of electronic ballast of high intensity gas discharge lamp |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102630117A (en) * | 2012-03-21 | 2012-08-08 | 深圳市全盛德电子有限公司 | Low-frequency homenergic synchronous switch gas discharge lamp driving circuit |
| 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 |
| CN106132053A (en) * | 2016-07-22 | 2016-11-16 | 杭州士兰微电子股份有限公司 | The control circuit of high-voltage gas discharging light, control method and drive circuit |
-
2004
- 2004-03-22 CN CNB2004100172292A patent/CN100553397C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102630117A (en) * | 2012-03-21 | 2012-08-08 | 深圳市全盛德电子有限公司 | Low-frequency homenergic synchronous switch gas discharge lamp driving circuit |
| CN106132053A (en) * | 2016-07-22 | 2016-11-16 | 杭州士兰微电子股份有限公司 | The control circuit of high-voltage gas discharging light, control method and drive circuit |
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| Publication number | Publication date |
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| CN100553397C (en) | 2009-10-21 |
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Granted publication date: 20091021 Termination date: 20120322 |