CN203206575U - A novel HID lamp driving circuit - Google Patents
A novel HID lamp driving circuit Download PDFInfo
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- CN203206575U CN203206575U CN2013201051247U CN201320105124U CN203206575U CN 203206575 U CN203206575 U CN 203206575U CN 2013201051247 U CN2013201051247 U CN 2013201051247U CN 201320105124 U CN201320105124 U CN 201320105124U CN 203206575 U CN203206575 U CN 203206575U
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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
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- 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
The utility model relates to a driving circuit and provides a novel HID lamp driving circuit. The novel HID lamp driving circuit achieves jitter of the frequency of a high-frequency square wave of a HID lamp to a certain extent, eliminates the generation of a stationary wave in operation, eliminates an acoustic resonance phenomenon, and has characteristics of simple circuit structure, low cost, and reliability. The novel HID lamp driving circuit comprises a EMI filtering and rectifying circuit, an active power factor correcting circuit, a half-bridge driving circuit, a high-frequency oscillating circuit, a current voltage protection circuit, a HID starting circuit, and a HID lamp. The output end of the high-frequency oscillating circuit is connected with the input end of the half-bridge driving circuit. The output end of the half-bridge driving circuit is connected with the HID lamp. The output of the half-bridge driving circuit is connected with the input end of the HID starting circuit through the current voltage protection circuit. The output end of the HID starting circuit is connected with the HID lamp. The novel HID lamp driving circuit also comprises a frequency jittering circuit connected with the input end of the high-frequency oscillating circuit. The output end of the active power factor correcting circuit is connected with the power end of the frequency jittering circuit.
Description
Technical field
The utility model relates to drive circuit, particularly a kind of novel HID lamp drive circuit.
Background technology
High-intensity gas discharge lamp (being called for short the HID lamp) adopts the high-frequency electronic drive circuit, when certain frequency the acoustic resonance phenomenon can occur, and this is a headachy problem.Reason is: adopting high frequency electric source to drive the HID lamp, the overpressure ripple can come back reflective from inside pipe wall, when the phase place of high-frequency current is identical with it, according to the Principle of Standing-wave of physics, can produce fluorescent tube and tube wall resonance this moment.And the Size dependence of resonance frequency and electric arc tube.It is not to be single that frequency is swung in resonance, comprises single order first-harmonic and high-order harmonic wave.As long as the frequency of drive current is identical with one of them, just might produce covibration.This resonance can make electric arc unstable, camber occurs, roll, rocks, until the electric arc tube explosion.In the frequency of electric arc tube resonance and the shape of discharge tube, size, the pipe service time of gas pressure, temperature, lamp relevant, resonance point can change frequently to some extent.Existing HID lamp high frequency drive circuit generally all is to adopt electric ballast to solve this problem for this reason, such as Chinese patent application number: 201110454943.8, a kind of HID lamp electronic ballast is disclosed, comprise EMI filtering and rectification circuit, APFC, the high frequency half bridge inverter circuit, lamp circuit, the high frequency half bridge inverse changing driving circuit, also comprise constant-power control circuit, the input of this constant-power control circuit links to each other with the APFC output, the output of this constant-power control circuit links to each other with the high frequency half bridge inverse changing driving circuit, this constant-power control circuit gathers the electric current of described APFC output, and export different control signals to the high frequency half bridge inverse changing driving circuit, thereby regulate the operating frequency of control chip in the high frequency half bridge inverse changing driving circuit, realize correction and/or the adjusting of HID bulb power.Chinese patent application number and for example: 200810189276.3, a kind of HID lamp electronic ballast is disclosed, comprise bridge rectifier filter circuit, the secondary filtering circuit, discharge circuit, high frequency transformer, full bridge driving circuit, the Micro Controller Unit (MCU) driving full-bridge circuit, single-chip microcomputer, direct-current voltage reducing circuit, testing circuit, two-way flyback transformer and pwm control circuit, namely adopted the two-way flyback transformer that can produce negative voltage to substitute the unidirectional flyback transformer of existing HID lamp electronic ballast on the basis of existing HID lamp electronic ballast, the employing power factor is high, the first-order system good stability, the fireballing pwm control circuit of load response replaces the SPWM control circuit of existing HID lamp electronic ballast.Existing HID lamp high frequency drive circuit still need adopt Inductive ballast to solve the problem of acoustic resonance, and its cost is high, and circuit structure is complicated.
Summary of the invention
Therefore, for above-mentioned problem, the utility model proposes a kind of frequency appearance shake to a certain degree of high frequency square wave of the HID of making lamp, be in operation and destroy the generation of standing wave, eliminated the acoustic resonance phenomenon, overcome the unfavorable factor of HID lamp high frequency drive circuit, circuit structure is simple, the low again reliable novel HID lamp drive circuit of cost.
For solving this technical problem; the utility model is taked following scheme: novel HID lamp drive circuit; comprise EMI filtering and rectification circuit; APFC; half-bridge drive circuit; high-frequency oscillating circuits; the current/voltage protective circuit; HID start-up circuit and HID lamp; described EMI filtering and rectification circuit output end are connected with the APFC input; described APFC output is connected with the half-bridge drive circuit power end with the high-frequency oscillating circuits power end respectively provides power supply for it; described high-frequency oscillating circuits output is connected with the half-bridge drive circuit input; described half-bridge drive circuit output is connected with the HID lamp; described half-bridge drive circuit output is connected with HID lamp start-up circuit input through the current/voltage protective circuit; described current/voltage protective circuit also is connected with high-frequency oscillating circuits; described HID start-up circuit output is connected with the HID lamp; also comprise frequency jitter circuit; described frequency jitter circuit is connected with the high-frequency oscillating circuits input, and described APFC output is connected with the frequency jitter circuit power end.
Further, described frequency jitter circuit comprises capacitor C 1, C2, C3, C4, resistance R 1, R2, R3, R4, diode DB3 and operational amplifier IC1, described resistance R 1 one ends are connected with the power output end of APFC, another termination capacitor C 1 one ends, capacitor C 3 one ends and diode DB3 one end, described capacitor C 1 other end earth connection, described capacitor C 4 other ends are connected with operational amplifier IC1 the 2nd pin through resistance R 3, another termination capacitor C 2 one ends of described diode DB3 and resistance R 2 one ends, described capacitor C 2 other ends and resistance R 2 other end earth connections, described operational amplifier IC1 the 1st, the 3rd pin all is connected with resistance R 4 one ends, described resistance R 4 another termination capacitor C 4 one ends, capacitor C 4 another termination high-frequency oscillating circuits inputs.
Further, described high-frequency oscillating circuits comprises pwm control circuit integrated chip IC2 and vibration timer, described vibration timer is made of resistance R 5 and capacitor C 5, described pwm control circuit integrated chip IC2 the 2nd pin connecting resistance R5 one end and frequency jitter circuit output, described pwm control circuit integrated chip IC2 the 3rd pin connects capacitor C 5 one ends, described resistance R 5 other ends, capacitor C 5 other ends and the equal earth connection of described pwm control circuit integrated chip IC2 the 4th pin.
Further, described current/voltage protective circuit comprises overvoltage crowbar, current foldback circuit and delay circuit.
By adopting the aforementioned techniques scheme, the beneficial effects of the utility model are: access frequency jitter circuit by adopting before high-frequency oscillating circuits, be that the 400V DC bus-bar voltage is charged to C1 by R1, when the C1 both end voltage reaches the cut-in voltage of bidirectional diode DB3, the DB3 conducting; C1 is by DB3 loop discharge and to the C2 charging, when the current potential at C2 two ends during near the current potential at DB3 two ends, and the DB3 cut-off; This moment, C2 began R2 discharge, from and cause C2 hot end voltage drop, DB3 begins again conducting.Thereby produced the low frequency sawtooth waveforms with R2, C2 loop time constant in the lower end of C3, be coupled to operational amplifier IC1 by C3, R3.Centered by operational amplifier IC1, formed voltage follower, the low frequency sawtooth waveforms has been carried out impedance matching.Be coupled to by R4 and C4 on the timing resistor R5 of high-frequency generator IC2.Herein, high-frequency generator IC2 is the pwm control circuit integrated chip, and its vibration timer is comprised of R5, C5.Can understand like this be added to two ends of R5 of the low frequency sawtooth signal that is transmitted by C4 herein, being equivalent to provides a pulsating voltage to R5, that is to say that being equal to R5 is a periodically variable timing resistor of resistance.The result is that high-frequency generator IC2 has produced one periodically variable frequency square wave.When the parameter of suitable adjustment R2 and related device, take into account the impact on lamp current, when jitter rate was controlled at 1% left and right sides, the subjective light of not finding had flickering.Make the frequency appearance shake to a certain degree of the high frequency square wave of HID lamp, be in operation and destroy the generation of standing wave, eliminated the acoustic resonance phenomenon, overcome the unfavorable factor of HID lamp high frequency drive circuit, circuit structure is simple, and cost is low reliable again, so that the HID high frequency drive circuit need not to use Inductive ballast to solve problem, a technical important breakthrough, but wide popularization and application.
Description of drawings
Fig. 1 is the theory diagram of the utility model embodiment;
Fig. 2 is the circuit structure diagram of the utility model embodiment;
Fig. 3 is the circuit diagram of the utility model embodiment medium frequency dither circuit and high-frequency oscillating circuits;
Fig. 4 is the sawtooth waveforms measured waveform figure of input high-frequency generator among the utility model embodiment;
Fig. 5 is the voltage measured waveform figure at HID lamp two ends among the utility model embodiment.
Embodiment
Now with embodiment the utility model is further specified by reference to the accompanying drawings.
With reference to figure 1; Fig. 2; novel HID lamp drive circuit of the present utility model; comprise EMI filtering and rectification circuit 1; APFC 2; half-bridge drive circuit 3; frequency jitter circuit 4; high-frequency oscillating circuits 5; current/voltage protective circuit 6; HID start-up circuit 7 and HID lamp 8; described EMI filtering and rectification circuit 1 output are connected with APFC 2 inputs; described APFC 2 outputs respectively with frequency jitter circuit 4 power ends; high-frequency oscillating circuits 5 power ends are connected with half-bridge drive circuit 3 power ends provides power supply for it; described high-frequency oscillating circuits 5 outputs are connected with half-bridge drive circuit 3 inputs; described half-bridge drive circuit 3 outputs are connected with HID lamp 8; described half-bridge drive circuit 3 outputs are connected with HID lamp start-up circuit 7 inputs through current/voltage protective circuit 6; described current/voltage protective circuit 6 also is connected with high-frequency oscillating circuits 5; described HID start-up circuit 7 outputs are connected with HID lamp 8; described frequency jitter circuit 4 is connected with high-frequency oscillating circuits 5 inputs, and described current/voltage protective circuit 6 comprises overvoltage crowbar; current foldback circuit and delay circuit.
With reference to figure 3, described frequency jitter circuit 4 comprises capacitor C 1, C2, C3, C4, resistance R 1, R2, R3, R4, diode DB3 and operational amplifier IC1, described resistance R 1 one ends are connected with the power output end of APFC, another termination capacitor C 1 one ends, capacitor C 3 one ends and diode DB3 one end, described capacitor C 1 other end earth connection, described capacitor C 4 other ends are connected with operational amplifier IC1 the 2nd pin through resistance R 3, another termination capacitor C 2 one ends of described diode DB3 and resistance R 2 one ends, described capacitor C 2 other ends and resistance R 2 other end earth connections, described operational amplifier IC1 the 1st, the 3rd pin all is connected with resistance R 4 one ends, described resistance R 4 another termination capacitor C 4 one ends, pwm control circuit integrated chip IC2 the 2nd pin of capacitor C 4 another termination high-frequency oscillating circuitss 5, described high-frequency oscillating circuits 5 comprises pwm control circuit integrated chip IC2 and vibration timer, described vibration timer is made of resistance R 5 and capacitor C 5, capacitor C 4 one ends of described pwm control circuit integrated chip IC2 the 2nd pin connecting resistance R5 one end and frequency jitter circuit, described pwm control circuit integrated chip IC2 the 3rd pin connects capacitor C 5 one ends, described resistance R 5 other ends, capacitor C 5 other ends and the equal earth connection of described pwm control circuit integrated chip IC2 the 4th pin.
With reference to figure 4, Fig. 5, the utility model accesses frequency jitter circuit by adopting before high-frequency oscillating circuits, and namely the 400V DC bus-bar voltage is charged to C1 by R1, when the C1 both end voltage reaches the cut-in voltage of bidirectional diode DB3, and the DB3 conducting; C1 is by DB3 loop discharge and to the C2 charging, when the current potential at C2 two ends during near the current potential at DB3 two ends, and the DB3 cut-off; This moment, C2 began R2 discharge, from and cause C2 hot end voltage drop, DB3 begins again conducting.Thereby produced the low frequency sawtooth waveforms with R2, C2 loop time constant in the lower end of C3, be coupled to operational amplifier IC1 by C3, R3.Centered by operational amplifier IC1, formed voltage follower, the low frequency sawtooth waveforms has been carried out impedance matching.Be coupled to by R4 and C4 on the timing resistor R5 of high-frequency generator IC2.Herein, high-frequency generator IC2 is the pwm control circuit integrated chip, and its vibration timer is comprised of R5, C5.Can understand like this be added to two ends of R5 of the low frequency sawtooth signal that is transmitted by C4 herein, being equivalent to provides a pulsating voltage to R5, that is to say that being equal to R5 is a periodically variable timing resistor of resistance.The result is that high-frequency generator IC2 has produced one periodically variable frequency square wave.When the parameter of suitable adjustment R2 and related device, take into account the impact on lamp current, when jitter rate was controlled at 1% left and right sides, the subjective light of not finding had flickering.Make the frequency appearance shake to a certain degree of the high frequency square wave of HID lamp, be in operation and destroy the generation of standing wave, eliminated the acoustic resonance phenomenon, overcome the unfavorable factor of HID lamp high frequency drive circuit, circuit structure is simple, and cost is low reliable again, so that the HID high frequency drive circuit need not to use Inductive ballast to solve problem, a technical important breakthrough, but wide popularization and application.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; within not breaking away from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection range of the present utility model.
Claims (4)
1. novel HID lamp drive circuit; comprise EMI filtering and rectification circuit; APFC; half-bridge drive circuit; high-frequency oscillating circuits; the current/voltage protective circuit; HID start-up circuit and HID lamp; described EMI filtering and rectification circuit output end are connected with the APFC input; described APFC output is connected with the half-bridge drive circuit power end with the high-frequency oscillating circuits power end respectively provides power supply for it; described high-frequency oscillating circuits output is connected with the half-bridge drive circuit input; described half-bridge drive circuit output is connected with the HID lamp; described half-bridge drive circuit output is connected with HID lamp start-up circuit input through the current/voltage protective circuit; described current/voltage protective circuit also is connected with high-frequency oscillating circuits; described HID start-up circuit output is connected with the HID lamp; it is characterized in that: also comprise frequency jitter circuit; described frequency jitter circuit is connected with the high-frequency oscillating circuits input, and described APFC output is connected with the frequency jitter circuit power end.
2. novel HID lamp drive circuit according to claim 1, it is characterized in that: described frequency jitter circuit comprises capacitor C 1, C2, C3, C4, resistance R 1, R2, R3, R4, diode DB3 and operational amplifier IC1, described resistance R 1 one ends are connected with the power output end of APFC, another termination capacitor C 1 one ends, capacitor C 3 one ends and diode DB3 one end, described capacitor C 1 other end earth connection, described capacitor C 4 other ends are connected with operational amplifier IC1 the 2nd pin through resistance R 3, another termination capacitor C 2 one ends of described diode DB3 and resistance R 2 one ends, described capacitor C 2 other ends and resistance R 2 other end earth connections, described operational amplifier IC1 the 1st, the 3rd pin all is connected with resistance R 4 one ends, described resistance R 4 another termination capacitor C 4 one ends, capacitor C 4 another termination high-frequency oscillating circuits inputs.
3. novel HID lamp drive circuit according to claim 1 and 2, it is characterized in that: described high-frequency oscillating circuits comprises pwm control circuit integrated chip IC2 and vibration timer, described vibration timer is made of resistance R 5 and capacitor C 5, described pwm control circuit integrated chip IC2 the 2nd pin connecting resistance R5 one end and frequency jitter circuit output, described pwm control circuit integrated chip IC2 the 3rd pin connects capacitor C 5 one ends, described resistance R 5 other ends, capacitor C 5 other ends and the equal earth connection of described pwm control circuit integrated chip IC2 the 4th pin.
4. novel HID lamp drive circuit according to claim 1, it is characterized in that: described current/voltage protective circuit comprises overvoltage crowbar, current foldback circuit and delay circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201051247U CN203206575U (en) | 2013-03-07 | 2013-03-07 | A novel HID lamp driving circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013201051247U CN203206575U (en) | 2013-03-07 | 2013-03-07 | A novel HID lamp driving circuit |
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| CN203206575U true CN203206575U (en) | 2013-09-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103152958A (en) * | 2013-03-07 | 2013-06-12 | 福建蓝蓝高科技发展有限公司 | HID (high-intensity-discharge) lamp high-frequency driving circuit |
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2013
- 2013-03-07 CN CN2013201051247U patent/CN203206575U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103152958A (en) * | 2013-03-07 | 2013-06-12 | 福建蓝蓝高科技发展有限公司 | HID (high-intensity-discharge) lamp high-frequency driving circuit |
| CN103152958B (en) * | 2013-03-07 | 2015-04-22 | 福建蓝蓝高科技发展有限公司 | HID (high-intensity-discharge) lamp high-frequency driving circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Pan Yuzhuo Inventor after: Huang Ernan Inventor after: Huang Jingni Inventor before: Pan Yuzhuo Inventor before: Huang Ernan Inventor before: Huang Jingting |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: PAN YUZHUO HUANG ERNAN HUANG JINGTING TO: PAN YUZHUO HUANG ERNAN HUANG JINGNI |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130918 Termination date: 20160307 |