CN101022690B - Electronic ballast - Google Patents
Electronic ballast Download PDFInfo
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- CN101022690B CN101022690B CN200610007508XA CN200610007508A CN101022690B CN 101022690 B CN101022690 B CN 101022690B CN 200610007508X A CN200610007508X A CN 200610007508XA CN 200610007508 A CN200610007508 A CN 200610007508A CN 101022690 B CN101022690 B CN 101022690B
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Abstract
An electronic ballast consists of filtering circuit, bridge rectification circuit, power factor calibration circuit, high frequency transform circuit and start-up circuit being connected in sequence; low voltage DC power supply and pulse generating and driving circuit including all-bridge actuator and four switch accelerators.
Description
Technical field
The present invention relates to electronic applications, relate in particular to a kind of powerful electric ballast.
Background technology
High-intensity gas discharge lamp (HID lamp) is a purposes novel energy-saving electric light source very widely, advantages such as energy-conservation, that volume is little, spectrum good, luminous efficiency is high, the life-span is long have been compared with incandescent lamp, become the preferred light source of public place and domestic lighting gradually, electric ballast matching used with it, particularly high-power, high-intensity electric ballast, problems such as it is not strong also to exist power to export, and the stability of circuit and reliability are relatively poor.Chinese patent ZL01280502.5 discloses a kind of " electronics suppression stream device ", comprise filter circuit, bridge rectifier, circuit of power factor correction, drive circuit and high frequency conversion circuit, output circuit, 15V voltage stabilizing circuit, pulse-width modulator PWM, alternating current elder generation is wave circuit after filtration, with after rectification circuit divides two-way output, one the tunnel is input to the 15V voltage stabilizing circuit supplies with pulse width modulation (PWM), and power factor correction circuit is defeated by on another road; Pulse-width modulator produces pulse width modulating signal, and offers drive circuit and high frequency conversion circuit; The signal through Active PFC of drive circuit and high frequency conversion circuit received power factor correcting circuit output, again through drive circuit and high frequency conversion circuit to output circuit.The high-frequency converter that power switch VT2, VT3 form in the drive circuit of this electric ballast and the high frequency conversion circuit is the working method of semi-bridge inversion, and the main problem that exists is that power output is big inadequately, and the stability of entire circuit and reliability are also relatively poor.
Summary of the invention
The purpose of this invention is to provide a kind of can satisfy high-power high-intensity gas discharge lamp (HID lamp) needs, power output is big and stability and reliability electric ballast preferably.
Technical scheme of the present invention is: a kind of electric ballast, include the filter circuit, bridge rectifier, circuit of power factor correction, high frequency conversion circuit and the start-up circuit that connect successively, and also include low-voltage dc power supply and pulse generation and drive circuit; It is characterized in that described pulse generation and drive circuit include full bridge driver and four switch accelerator T11-T14; Each connects the current limliting accelerating circuit that is composed in parallel by resistance and electric capacity the input of switch accelerator T11-T14, and each current limliting accelerating circuit is connected with the respective signal output of full bridge driver.
Described switch accelerator T11-T14 is made of each a triode and a diode; The positive pole of diode is connected with the base stage of triode, and the negative pole of diode is connected with the emitter of triode, the just very input of diode wherein, and the negative pole of diode is an output.
Described pulse generation and drive circuit also include timing resistor R
OSCWith timing capacitor C
OSCTiming resistor R
OSCWith timing capacitor C
OSCAll be connected with full bridge driver.
Described high frequency conversion circuit includes field effect transistor Q2, Q3, Q4, Q5; The grid of field effect transistor Q2, Q3, Q4, Q5 connects with the corresponding output of switch accelerator T11-T14 respectively, the drain electrode of Q2 is connected with the output of circuit of power factor correction with the drain electrode of Q4, be connected by a resistance between the source electrode of Q2 and the drain electrode of Q3, be connected by a resistance between the source electrode of Q4 and the drain electrode of Q5, two resistance by series connection between the source electrode of Q3 and the source electrode of Q5 are connected the junction ground connection of two series resistances.
Corresponding each field effect transistor connects a resistance capaciting absorpting circuit that is composed in series by electric capacity and resistance in the described high frequency conversion circuit.
Described pulse generation and drive circuit also are connected with a protective circuit, and the input of protective circuit is connected with an output of high frequency conversion circuit, and the output of protective circuit is connected with an input of pulse generation and drive circuit.
The model of described full bridge driver is UBA2032T.
Described circuit of power factor correction has the power factor corrector that model is MC33262.
It is the photoelectrical coupler of 4N25 that described low-voltage dc power supply has Switching Power Supply single-chip microcomputer and the model that model is TOP211Y.
The invention has the beneficial effects as follows:
Because high frequency conversion circuit and pulse generation and drive circuit adopt the full-bridge working method, improved the power output capacity of electric ballast greatly, power output is reached more than the 1000W.The electrical network input voltage is when 165V to 265V changes, and the stability of circuit and reliability are also better.Switch accelerator and current limliting accelerating circuit have shortened field effect transistor from the time of saturation condition to the cut-off state transition, reduce the power loss of field effect transistor, and resistance capaciting absorpting circuit is protected field effect transistor, makes circuit more stable.Because power output is stable, makes the condition of work of bulb also more stable, bulb is operated in permanent power and HF switch state, has effectively prolonged the useful life of bulb.
Description of drawings
Fig. 1 is a functional-block diagram of the present invention;
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
See Fig. 1, the present invention includes the filter circuit 1, bridge rectifier 2, circuit of power factor correction 3, high frequency conversion circuit 4 and the start-up circuit 5 that connect successively, and low-voltage dc power supply 6, pulse generation and drive circuit 7 and protective circuit 8.The input of low-voltage dc power supply 6 is connected with the output of bridge rectifier 2; the output of low-voltage dc power supply 6 is connected with pulse generation and drive circuit 7 with circuit of power factor correction 3, connects protective circuit 8 between high frequency conversion circuit 4 and pulse generation and the drive circuit 7.
See Fig. 2, filter circuit 1 is connected and composed by fuse FU1, piezo-resistance RV, capacitor C 1, C2, C23～C25 and high-frequency inductor L1, L2.
Bridge rectifier 2 is connected and composed by four diode D11～D14.
Circuit of power factor correction 3 is to be that MC33262 power factor corrector and peripheral resistance R 1-R8, electrochemical capacitor C7, capacitor C 3, C4, C5, C6, transformer T2, field effect transistor Q1, diode D2 constitute by model; Wherein, capacitor C 3 is a filter capacitor; Capacitor C 4 is connected other end ground connection with resistance R 1 back in parallel one end with input 3 pin of power factor corrector; 3 pin of power factor corrector also are connected with an end of resistance R 2, and the other end of resistance R 2 is connected with transformer T2 with the output of bridge rectifier 2 respectively; The compensation of power factor corrector holds 2 pin to be connected the other end ground connection of capacitor C 5 with an end of capacitor C 5; Voltage Feedback input 1 pin of power factor corrector is connected with an end of resistance R 8 and resistance R 6 respectively, the other end ground connection of resistance R 6, the other end of resistance R 8 is connected with the negative pole of diode D2, the negative pole of diode D2 also is connected with the positive pole of electrochemical capacitor C7, the minus earth of C7, the positive pole of diode D2 is connected with transformer T2; Zero current detection end 5 pin of power factor corrector are connected with an end of resistance R 3, and the other end of resistance R 3 is connected with transformer T2; Drive output 7 pin of power factor corrector are connected with an end of resistance R 4, the other end of resistance R 4 is connected with the grid of field effect transistor Q1, the drain electrode of field effect transistor Q1 is connected with the positive pole of diode D2, the source electrode of field effect transistor Q1 is connected with an end of resistance R 5 and resistance R 7 respectively, the other end ground connection of resistance R 7, the other end of resistance R 5 be connected the other end ground connection of capacitor C 6 with capacitor C 6 with current feedback input 4 pin of power factor corrector respectively; The negative pole of diode D2 is as the output output dc voltage of circuit of power factor correction 3.
High frequency conversion circuit 4 is connected and composed by field effect transistor Q2, Q3, Q4, Q5, resistance R 12, R13, R14, R16, R17, R18, R21, R22, capacitor C 16, C17, C19, C20; High frequency conversion circuit 4 adopts the full-bridge working method.The grid of field effect transistor Q2, Q3, Q4, Q5 connects with the corresponding output of switch accelerator T11-T14 respectively, the drain electrode of Q2 is connected with the output of circuit of power factor correction with the drain electrode of Q4, be connected by resistance R 13 between the source electrode of Q2 and the drain electrode of Q3, be connected by resistance R 18 between the source electrode of Q4 and the drain electrode of Q5, two resistance R 21 by series connection between the source electrode of Q3 and the source electrode of Q5 are connected with R22, the junction ground connection of two series resistance R21 and R22.Corresponding each field effect transistor connects one by capacitor C 16 and resistance R 12 in the high frequency conversion circuit 4, capacitor C 17 and resistance R 14, capacitor C 19 and resistance R 16, the resistance capaciting absorpting circuit that capacitor C 20 and resistance R 17 are formed respectively; Be connected in parallel on the two ends of field effect transistor Q2 and resistance R 13 after capacitor C 16 and resistance R 12 series connection again, be connected in parallel on the two ends of field effect transistor Q3 and resistance R 21 after capacitor C 17 and resistance R 14 series connection again, be connected in parallel on the two ends of field effect transistor Q4 and resistance R 18 after capacitor C 19 and resistance R 16 series connection again, be connected in parallel on the two ends of field effect transistor Q5 and resistance R 22 after capacitor C 20 and resistance R 17 series connection again.
Pulse generation and drive circuit 7 are UBA2032T full bridge driver and peripheral cell thereof, timing resistor R by model
OSc, timing capacitor C
OSC, resistance R 10, R11, R19, R20, capacitor C 12-C15, C21, C22, switch accelerator T11-T14 connect and compose; Pulse generation and drive circuit 7 adopt the full-bridge working method.Wherein, resistance R 10 and capacitor C 12 are in parallel form the current limliting accelerating circuits after an end be connected with the GHR signal output part of full bridge driver, the other end is connected with the signal input part A1 of switch accelerator T11, resistance R 11 and capacitor C 14 are in parallel form the current limliting accelerating circuits after an end be connected with the GLR signal output part of full bridge driver, the other end is connected with the input A2 of switch accelerator T12, resistance R 20 and capacitor C 22 are in parallel form the current limliting accelerating circuits after an end be connected with the GLL signal output part of full bridge driver, the other end is connected with the input A3 of switch accelerator T13, resistance R 19 and capacitor C 21 are in parallel form the current limliting accelerating circuits after an end be connected with the GHL signal output part of full bridge driver, the other end is connected with the input A4 of switch accelerator T14, the two ends of capacitor C 13 are connected with the SHR end with the FSR end of full bridge driver respectively, and the SHR end of full bridge driver also is connected with the C1 end of switch accelerator T11; The two ends of capacitor C 15 are connected with the FSL end with the SHL end of full bridge driver respectively, and the SHL end of full bridge driver also is connected with the C4 end of switch accelerator T14; The C2 end of switch accelerator T12 and the C3 end of switch accelerator T13 be ground connection respectively.Timing resistor R
OSCTwo ends be connected timing capacitor C with the vdd terminal of full bridge driver with the RC end respectively
OSCTwo ends hold with the RC of full bridge driver end and SGND respectively and be connected timing resistor R
OSCWith timing capacitor C
OSCBe used to adjust the frequency of oscillation of full bridge driver.
Low-voltage dc power supply 6 is that 4N25 photoelectrical coupler, model are that TOP211Y Switching Power Supply single-chip microcomputer and peripheral cell, transformer T4 connect and compose by model.Low-voltage dc power supply 6 output 15V direct voltages are for power factor corrector and full bridge driver provide voltage.
Start-up circuit 5 is to be connected and composed by inductance T3 and capacitor C 18; Inductance T3 and capacitor C 18 series connection, the two ends of load are connected with the two ends of capacitor C 18 respectively.
After connecting grid alternating current, alternating current is at first through anti-electromagnetic interference (EMI) filter circuit 1 filtering, again after rectification circuit 2 rectifications, its output is divided into two-way: the one road to low-voltage dc power supply 6, stable 15V direct voltage of low-voltage dc power supply 6 outputs is respectively the full bridge driver power supply of capability correction device and the model UBA2032T of MC33262 to model; Another road is to circuit of power factor correction 3, and circuit of power factor correction 3 is changed stable 400V direct voltage of output with the voltage signal of input, gives start-up circuit 5 and electric by high frequency conversion circuit 4.
Pulse generation and drive circuit 7 start working after electric, the HGR pin of full bridge driver, GLL pin and GLR pin, GHL pin output pulse signal are respectively controlled the conducting of Q2, Q3, Q4, Q5 and are ended; Wherein, when the pulse signal of GHR, the output of GLL pin was high level, the pulse signal of GLR, the output of GHL pin was a low level, field effect transistor Q2, Q5 conducting at this moment, Q3, Q4 end, thereby the current path that forms is+400VDC-Q2-R13-T3-C18-Q5-R22-ground; When the pulse signal of GHR, the output of GLL pin is low level, the pulse signal of GLR, the output of GHL pin is a high level, field effect transistor Q2, Q5 end at this moment, Q3, Q4 conducting, thereby the current path that at this moment forms is+400VDC-Q4-R18-C18-T3-Q3-R21-ground.Like this, take turns conducting and ending according to above-mentioned field effect transistor Q2, Q5 and Q3, Q4, make the start-up circuit 5 of 18 groups of inductance T3 and capacitor C produce series resonance, when the frequency of oscillation of setting when the resonance frequency of series resonance and ballast is the same, to produce resonance, thereby produce the ignition voltage of a 2-3KV at the load two ends, the triggering of load HID lamp is lighted, after load HID lamp is lighted, the current path that forms is :+400VDC-Q2-R13-T3-HID lamp-Q5-R22-ground, or+400VDC-Q4-R18-HID lamp-T3-Q3-R21-ground.After the HID lamp is lighted, capacitor C 18 will no longer form series resonance with inductance T3 as bulb bypass building-out capacitor, and inductance T3 plays metering function, makes HID lamp current, voltage keep stable.
In addition, by changing timing resistor R
OSCWith timing capacitor C
OSCParameter, adjustable whole pulse takes place and the frequency of oscillation of drive circuit 7; Capacitor C 13, C15 are that the signal of GHR pin and the output of GHL pin produces a high-end floating empty current potential.Resistance R 10, R11, R19, R20 are the grid current-limiting resistance, and capacitor C 12, C11, C21, C22 are speed-up capacitor.Resistance R 13, R18, R21, R22 are Current Negative Three-Point Capacitance resistance, play the effect of stationary field effect pipe working point.C16 and R12, C17 and R14, C19 and R16, C20 and R17 form resistance capaciting absorpting circuit respectively, play the protection field effect transistor; The circuit function that switch accelerator T11-T14 forms is: shorten field effect transistor from the time of saturation condition to the cut-off state transition, the switching speed of field effect transistor is accelerated, reduce the power loss of field effect transistor.
When load is short-circuited or during abnormal conditions such as open circuit; the electric current that flows through resistance R 21 or R22 increases; therefore be added in pressure drop on R21 and the R22 also along with increase; when the pressure drop on resistance R 21 or the R22 surpasses 1.29V; this voltage signal feeds back to the BD pin (the BD pin is the in-phase input end that bridge circuit is forbidden comparator) of full bridge driver by R15 or R23; bridge circuit is forbidden comparator output high level; the pulse output signals of full bridge driver is turn-offed; high-frequency converter is quit work; at this moment; electric ballast does not have power output, is in the low-power consumption guard mode, thereby has protected electric ballast not to be damaged.
Claims (7)
1. an electric ballast includes the filter circuit, bridge rectifier, circuit of power factor correction, high frequency conversion circuit and the start-up circuit that connect successively, also includes low-voltage dc power supply and pulse generation and drive circuit; It is characterized in that: the input of described low-voltage dc power supply is connected with the output of bridge rectifier, the output of low-voltage dc power supply is connected with pulse generation and drive circuit with circuit of power factor correction, and the output of pulse generation and drive circuit is connected with the high frequency conversion circuit;
Described pulse generation and drive circuit include full bridge driver and four switch accelerator T11-T14; Described switch accelerator T11-T14 is made of each a triode and a diode; The positive pole of diode is connected with the base stage of triode, and the negative pole of diode is connected with the emitter of triode, the just very input of diode wherein, and the negative pole of diode is an output; Each connects the current limliting accelerating circuit that is composed in parallel by resistance and electric capacity the input of switch accelerator T11-T14, and each current limliting accelerating circuit is connected with the respective signal output of full bridge driver;
Described high frequency conversion circuit includes field effect transistor Q2, Q3, Q4, Q5; Described high frequency conversion circuit adopts the full-bridge working method; The grid of field effect transistor Q2, Q3, Q4, Q5 connects with the corresponding output of switch accelerator T11-T14 respectively, the drain electrode of Q2 is connected with the output of circuit of power factor correction with the drain electrode of Q4, be connected by a resistance between the source electrode of Q2 and the drain electrode of Q3, be connected by a resistance between the source electrode of Q4 and the drain electrode of Q5, two resistance by series connection between the source electrode of Q3 and the source electrode of Q5 are connected the junction ground connection of two series resistances.
2. electric ballast according to claim 1 is characterized in that: described pulse generation and drive circuit also include timing resistor R
OSCWith timing capacitor C
OSCTiming resistor R
OSCWith timing capacitor C
OSCAll be connected with full bridge driver.
3. electric ballast according to claim 1 is characterized in that: corresponding each field effect transistor connects a resistance capaciting absorpting circuit that is composed in series by electric capacity and resistance in the described high frequency conversion circuit.
4. electric ballast according to claim 1; it is characterized in that: described pulse generation and drive circuit also are connected with a protective circuit; the input of protective circuit is connected with an output of high frequency conversion circuit, and the output of protective circuit is connected with an input of pulse generation and drive circuit.
5. electric ballast according to claim 1 is characterized in that: the model of described full bridge driver is UBA2032T.
6. electric ballast according to claim 1 is characterized in that: described circuit of power factor correction has the power factor corrector that model is MC33262.
7. electric ballast according to claim 1 is characterized in that: it is the photoelectrical coupler of 4N25 that described low-voltage dc power supply has Switching Power Supply single-chip microcomputer and the model that model is TOP211Y.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610007508XA CN101022690B (en) | 2006-02-13 | 2006-02-13 | Electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610007508XA CN101022690B (en) | 2006-02-13 | 2006-02-13 | Electronic ballast |
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| CN101022690A CN101022690A (en) | 2007-08-22 |
| CN101022690B true CN101022690B (en) | 2010-09-01 |
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| CN200610007508XA Expired - Fee Related CN101022690B (en) | 2006-02-13 | 2006-02-13 | Electronic ballast |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101815396B (en) * | 2010-04-13 | 2015-06-03 | 林聪� | Hot glow starting electronic ballast of high-strength discharge lamp |
| US8575856B2 (en) * | 2011-06-01 | 2013-11-05 | City University Of Hong Kong | Driver circuit for powering a DC lamp in a non-DC lamp fitting |
| CN103079325B (en) * | 2012-12-20 | 2015-12-09 | 中山市小榄镇鲁太照明有限公司 | A kind of circuit device for high-efficiency electronic ballast |
| CN105430843B (en) * | 2015-12-02 | 2023-08-04 | 上海航空电器有限公司 | Anti-collision lamp circuit with LED constant voltage constant current drive and stroboscopic control |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1149732A (en) * | 1996-08-21 | 1997-05-14 | 刘小河 | Initial consonant, simple or compound vowel and tone stroke Chinese character coding method |
| CN2364654Y (en) * | 1999-01-18 | 2000-02-16 | 李名酉 | Electronic ballast for high intensity gas discharge lamp |
| CN2396599Y (en) * | 1999-09-30 | 2000-09-13 | 家电宝有限公司 | Electronic ballast |
| CN2662590Y (en) * | 2003-10-23 | 2004-12-08 | 樊贤信 | Electronic ballast for high voltage sodium lamp and metal halide lamp |
-
2006
- 2006-02-13 CN CN200610007508XA patent/CN101022690B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1149732A (en) * | 1996-08-21 | 1997-05-14 | 刘小河 | Initial consonant, simple or compound vowel and tone stroke Chinese character coding method |
| CN2364654Y (en) * | 1999-01-18 | 2000-02-16 | 李名酉 | Electronic ballast for high intensity gas discharge lamp |
| CN2396599Y (en) * | 1999-09-30 | 2000-09-13 | 家电宝有限公司 | Electronic ballast |
| CN2662590Y (en) * | 2003-10-23 | 2004-12-08 | 樊贤信 | Electronic ballast for high voltage sodium lamp and metal halide lamp |
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