CN203151854U - Soft-switch-mode low-frequency square-wave electronic ballast for xenon lamp - Google Patents
Soft-switch-mode low-frequency square-wave electronic ballast for xenon lamp Download PDFInfo
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- CN203151854U CN203151854U CN 201320155010 CN201320155010U CN203151854U CN 203151854 U CN203151854 U CN 203151854U CN 201320155010 CN201320155010 CN 201320155010 CN 201320155010 U CN201320155010 U CN 201320155010U CN 203151854 U CN203151854 U CN 203151854U
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Abstract
The utility model discloses a soft-switch-mode low-frequency square-wave electronic ballast for a xenon lamp. According to the utility model, an aim of realizing constant power delivery of a xenon lamp load is realized through current feedback control by combining a BOOST circuit with a semi-bridge soft-switch inverting circuit and cooperating with a scheduling method corresponding to a control system. A power factor correcting link adopts an independent control chip, so that system interference is reduced. According to the utility model, the switching-on time and switching-off time of an MOS tube are determined through selecting MOS tube voltage and current for logical operation of a control circuit, so that the zero-voltage switching-on and the zero-voltage switching-off of the MOS tube are realized and the switch loss of the MOS tube is reduced. Detection and protection of abnormal states such as short circuit, open circuit, aging and the like of the xenon lamp are realized through collecting voltage and current of two output terminals in real time.
Description
Technical field
The present invention relates to a kind of soft switching mode low-frequency square-wave xenon lamp electric ballast, belong to the illumination art of electronics.
Background technology
Xenon gas metallic halogen lamp is to carry out significant improvement and innovation on the basis of Metal halogen lamp, add inert gas " xenon ", and internally the bubble prescription is improved, make bulb brightness and life-span all improve 2 accompany above, lumen per watt reaches 120, compare Metal halogen lamp, high-pressure sodium lamp is energy-conservation more than 40%, it is unique energy-saving illumination product in the high-power illumination field, the 250W Xenon gas metallic halogen lamp can produce the lumen number of 400W Metal halogen lamp, energy-saving effect is obvious, the negative resistance charactertistic that Xenon gas metallic halogen lamp is intrinsic and special startup requirement, and the ballast that must and be complementary with it uses jointly, electric ballast is compared with traditional inductance type ballast has lot of advantages, electric ballast efficient height, only several watts of self energy consumptions belong to energy-conserving product, secondly, have very high power factor, the electric ballast power factor is easy to accomplish improved the utilance of electric power system and electrical network effectively more than 0.95;
When the component of energy on lamp self acoustic resonance characteristic frequency that electric ballast provides Xenon gas metallic halogen lamp during greater than its threshold value, can excite the sound phenomenon of shaking, people have adopted the multiple technologies measure to eliminate the acoustic resonance phenomenon, as feed back null method, frequency is selected method, the variable frequency control method, hyperfrequency is lit a lamp, low-frequency square-wave driving method etc., comprehensive said method know-why and effect are as can be known, low-frequency square-wave driving method is the most effective, when adopting low-frequency square-wave to drive, because the operating frequency of lamp is lower than the minimum acoustic resonance frequency of Metal halogen lamp, as long as control the amplitude of the high frequency waves that superpose on the low-frequency square-wave well, make it less than 5%, just can guarantee fund's halogen lamp steady operation and the acoustic resonance phenomenon does not take place this is to use control mode the most widely in the present middle low power Xenon gas metallic halogen lamp electric ballast, light quality that discharge lamp work sends during at burning-point in low-frequency electronic rectifier with squre wave and standard inductor ballast is no significant difference;
The tradition low-frequency electronic rectifier with squre wave generally adopts tertiary structure, it is the BOOST boosting power factor correction circuit, BUCK reduction voltage circuit and DC-to-DC full-bridge or half-bridge inversion circuit, the sort circuit complex structure, the production cost costliness, in the middle of this tertiary structure, the BUCK reduction voltage circuit is born discharge lamp power adjustments control function, generally be the hard switching control mode, its switching device switching loss is very big, makes that ballast self efficient is difficult to improve, in order to simplify circuit, reduce cost, improve switching device efficient, disclose a kind of electric ballast in the prior art, cancelled BUCK reduction voltage circuit link, realize ac square wave output by half-bridge inversion circuit, by testing circuit operating voltage and current status, make switching device be in soft on off state simultaneously, greatly reduced its switching loss.
Summary of the invention
The technical problem to be solved in the present invention provides the HID xenon lamp electric ballast that a kind of soft switching mode low-frequency square-wave of two-stage half-bridge that power adjustments and ac square wave inversion are integrated drives;
For solving the problems of the technologies described above, the present invention adopts following technical scheme: low-frequency square-wave xenon lamp electric ballast is with DC/DC level and the low frequency inverse cascade formation one-level that combines, form the two-stage type structure with front end PFC level, the PFC level adopts the application-specific integrated circuit chip controls, switching tube Q1 is operated in the high frequency state, realization is to the adjusting (400V) of output bus, switching tube Q2, Q3 provides the low-frequency square-wave electric current in conjunction with forming half-bridge structure for xenon lamp, effectively avoid the generation of acoustic resonance, Q2, Q3 is operated in the high-frequency soft switch state, and the permanent control function of power of the stable state of xenon lamp also designs in this one-level;
This soft switching mode low-frequency square-wave xenon lamp electric ballast comprises the power supply input filter circuit, full-bridge rectification filter circuit, the APFC booster circuit, the soft-switching inversion circuit, firing circuit, the peak current sample circuit, resonance is sample circuit and resonant capacitance constantly, described power supply input filter circuit is connected with full-bridge rectification filter circuit, described full-bridge rectification filter circuit is connected with the APFC booster circuit, described APFC booster circuit is connected with the soft-switching inversion circuit, the output of described soft-switching inversion circuit is connected with firing circuit one output, described peak current sample circuit is connected with resonance moment sample circuit, described resonance testing circuit constantly is connected with resonant capacitance, described resonant capacitance is connected with the soft-switching inversion circuit, described soft switching mode low-frequency square-wave xenon lamp electric ballast also comprises the integrated control circuit with functions such as permanent power controls, described integrated control circuit comprises drive circuit, resonance is testing circuit constantly, the peak current detection circuit, ignition control circuit, power-sensing circuit, circuit of power factor correction, described drive circuit is connected with the soft-switching inversion circuit, described resonance testing circuit constantly is connected with resonance moment sample circuit, described peak current detection circuit is connected with the peak current sample circuit, described ignition control circuit is connected with firing circuit, described power-sensing circuit is connected with the APFC booster circuit, and described circuit of power factor correction is connected with the APFC booster circuit;
Circuit of power factor correction adopts the control of L6561 special integrated circuit, make its busbar voltage be stabilized in 400V, because busbar voltage is constant, if control bus average current also is steady state value, then the dc bus power output is steady state value just, because the used device of half-bridge inversion circuit is except Q2, Q3, be the inductance and the electric capacity that do not consume energy, and device Q2, Q3 are operated in soft on off state, its loss is very little, can ignore, so the bus power output is the power that consumes on the HID lamp, controls thought with this and realized the permanent power control of discharge lamp;
T2 is the peak current sampling, it also is resonant inductance, resonant inductance and resonant capacitance are at metal-oxide-semiconductor blocking interval generation resonance, when metal-oxide-semiconductor both end voltage resonance arrives no-voltage constantly, corresponding metal-oxide-semiconductor is opened in triggering, the no-voltage that has realized metal-oxide-semiconductor is open-minded, eliminated its turn-on consumption, because also there is resonant capacitance at the metal-oxide-semiconductor two ends, it turn-offs to no-voltage and turn-offs, and has so just guaranteed that metal-oxide-semiconductor is in no-voltage and turns on and off, and has realized soft switch control, the resonance no-voltage is by detecting the sampling of capacitor C 8 and C9 dividing potential drop, open signal by judging after the integrated control circuit logical process, providing, the metal-oxide-semiconductor cut-off signals is determined by its peak current, after its peak current had reached setting, integrated control circuit provided cut-off signals;
In the middle of the present invention, permanent power regulating and controlling changes to realize by peak current, simultaneously, according to metal-oxide-semiconductor current value state and service time state, can judge that the short circuit of HID fluorescent tube, open circuit and abnormality such as aging detect and do corresponding processing;
As of the present invention preferred, the positive and negative half-wave current sampling in the middle of the described soft switching mode low-frequency square-wave xenon lamp electric ballast is realized by a transformer T2;
As of the present invention preferred, the voltage resonance in the middle of the described soft switching mode low-frequency square-wave xenon lamp electric ballast obtains by capacitor C 8, C9 dividing potential drop constantly;
As of the present invention preferred, the permanent power control of described soft switching mode low-frequency square-wave xenon lamp electric ballast realizes by the control bus current;
The present invention adopts technique scheme: soft switching mode low-frequency square-wave xenon lamp electric ballast is by being merged into BUCK reduction voltage circuit and switching inverter circuit one-level and having realized the soft switch working state of metal-oxide-semiconductor with corresponding resonance control method, by Current Feedback Control, realized the purpose of permanent power control.This structure can not influence the work effect that merit is counted correcting circuit, by metal-oxide-semiconductor current value opening state, HID abnormal condition of lamp tube state is detected and do corresponding processing.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is done further and to specify;
Fig. 1 is the structured flowchart of the soft switching mode low-frequency square-wave of the present invention xenon lamp electric ballast;
Fig. 2 is the structural representation of the soft switching mode low-frequency square-wave of the present invention xenon lamp electric ballast;
Fig. 3 is the structure chart of the soft switching mode low-frequency square-wave of the present invention xenon lamp electric ballast;
Fig. 4 is the APFC structural representation of the soft switching mode low-frequency square-wave of the present invention xenon lamp electric ballast;
Fig. 5 is the three-level schema HID circuit of electronic ballast structural representation of prior art;
Fig. 6 is the drive signal waveform figure of the switching inverter circuit of the soft switching mode low-frequency square-wave of the present invention xenon lamp electric ballast.
Embodiment
As shown in Figure 1, 2, 3, soft switching mode low-frequency square-wave xenon lamp electric ballast power supply input filter circuit (1), full-bridge rectification filter circuit (2), APFC booster circuit (3), soft-switching inversion circuit (4), firing circuit (5), peak current sample circuit (6), resonance moment sample circuit (7) and resonant capacitance (8).Power supply input filter circuit (1) is connected with full-bridge rectification filter circuit (2), full-bridge rectification filter circuit (2) is that Active Power Factor Correction is connected with APFC booster circuit (3), APFC booster circuit (3) is connected with soft-switching inversion circuit (4), C4, the C5 series connection links to each other with the output of APFC booster circuit, C4, the C5 tie point links to each other with the HID xenon lamp, the output of soft-switching inversion circuit (4) is connected with firing circuit (5) one outputs, another output termination xenon lamp of firing circuit (5), drive circuit is connected with DC-AC half-bridge inversion circuit, peak current sample circuit (6) is connected with resonance moment sample circuit (7), the peak current sample circuit is by transformer T2 and diode D6, D7 forms, the secondary end of T2 is respectively through D6, the D7 rectification, to metal-oxide-semiconductor Q2, the Q3 electric current is sampled respectively, resonance is testing circuit (7) and Q2 constantly, the half-bridge mid point that Q3 constitutes connects, the resonance moment, testing circuit was by C8, the C9 dividing potential drop constitutes, form Non-Destructive Testing, resonant capacitance C10, C11 is connected in parallel on metal-oxide-semiconductor Q2 respectively, on the Q3, with the soft shutoff that realizes metal-oxide-semiconductor and soft open-minded, C6, the C7 series connection is on busbar voltage, C6, the C7 tie point links to each other with igniter with current sampling circuit, soft switching mode low-frequency square-wave xenon lamp electric ballast also comprises the integrated control circuit (9) with functions such as permanent power controls, and integrated control circuit (9) comprises drive circuit, resonance is testing circuit constantly, the peak current detection circuit, ignition control circuit, power-sensing circuit, circuit of power factor correction;
As shown in Figure 4, APFC structural representation for a kind of soft switching mode low-frequency square-wave xenon lamp electric ballast of the present invention, this circuit adopts special-purpose APFC control chip L6561, this circuit is a kind of output of boosting, and is operated in critical conduction mode, when metal-oxide-semiconductor Q1 conducting, diode D5 ends, electric current flows through main inductance L1, while main inductance L1 storage power, and this moment, load current was kept by output capacitance C4, C5; When metal-oxide-semiconductor Q1 disconnects, diode D5 conducting, main inductance Ll energy stored is the load power supply, input voltage vin and output voltage V out and metal-oxide-semiconductor Q1 current sampling resistor power on and are sent to control chip IC1, through the control chip computing, control metal-oxide-semiconductor Q1 break-make, make L1 go up the variation of current following input voltage, so, the electric current that flows through PFC boost inductance L1 is a kind of triangular wave, the envelope of its peak value (also being the mean value of input current) is the sine wave with the sinusoidal wave homophase of input voltage, has also just realized the sineization of input current, and and input voltage keep homophase;
The EMI filter circuit inserts electrical network, flow to full bridge rectifier through after the filtering, the full bridge rectifier output DC, this direct current is adjusted through APFC booster circuit 2 and is boosted, export higher DC bus-bar voltage (400V), its output is through C4, give DC one AC half-bridge inversion circuit behind the C5 series filtering, as Fig. 4, shown in 6, converter control circuit is to the switching tube Q2 of DC-AC half-bridge inversion circuit, turning on and off of Q3 pulse drive signal adjusts according to system mode constantly, thereby reach the soft on off state of metal-oxide-semiconductor, realize permanent power control purpose simultaneously, when the Q2 high frequency chopping is worked, it is output as forward current, when the Q3 high frequency chopping is worked, it is output as reverse current, metal-oxide-semiconductor Q2, Q3 is with the 180Hz alternation, respectively through C6, C7, the demodulation of T1 filter circuit, the low-frequency square-wave HID xenon lamp that obtains 180Hz drives signal, make the HID lamp be operated in the low frequency of 180Hz, can avoid the generation of acoustic resonance so effectively, by control metal-oxide-semiconductor Q2, the operating current of Q3 reaches the purpose of permanent power control.Because soft switching mode low-frequency square-wave xenon lamp electric ballast is merged into one-level with BUCK reduction voltage circuit and switching inverter circuit, and realized the soft switch working state of metal-oxide-semiconductor Q2, Q3 with corresponding resonance point control method, realized the purpose of permanent power control simultaneously.
Claims (4)
1. soft switching mode low-frequency square-wave xenon lamp electric ballast, it comprises power supply input filter circuit (1), full-bridge rectification filter circuit (2), APFC booster circuit (3), soft-switching inversion circuit (4), firing circuit (5), peak current sample circuit (6), resonance is sample circuit (7) and resonant capacitance (8) constantly, described power supply input filter circuit (1) is connected with full-bridge rectification filter circuit (2), described full-bridge rectification filter circuit (2) is connected with APFC booster circuit (3), described APFC booster circuit (3) is connected with soft-switching inversion circuit (4), the output of described soft-switching inversion circuit (4) is connected with firing circuit (5) one outputs, it is characterized in that another output termination xenon lamp of firing circuit (5), another termination of xenon lamp APFC booster circuit (3) serial connection capacitor C 4, the C5 intermediate point, described peak current sample circuit (6) is connected with resonance moment sample circuit (7), it is characterized in that: two outputs of described peak current sample circuit (6) connect two outputs of soft-switching inversion circuit (4) arbitrarily respectively, described resonance testing circuit (7) constantly is connected with resonant capacitance (8), it is characterized in that: described resonance sample circuit (7) input constantly is connected with an output of soft-switching inversion circuit (4), described resonant capacitance (8) is connected with soft-switching inversion circuit (4), it is characterized in that: described resonant capacitance (8) intermediate point is connected with resonance moment testing circuit (7) with peak current sample circuit (6) respectively, described soft switching mode low-frequency square-wave xenon lamp electric ballast also comprises the integrated control circuit (9) with functions such as permanent power controls, described integrated control circuit (9) comprises drive circuit, resonance is testing circuit constantly, the peak current detection circuit, ignition control circuit, power-sensing circuit, circuit of power factor correction, described drive circuit is connected with soft-switching inversion circuit (4), described resonance testing circuit constantly is connected with resonance moment sample circuit (7), described peak current detection circuit is connected with peak current sample circuit (6), described ignition control circuit is connected with firing circuit (5), described power-sensing circuit is connected with APFC booster circuit (3), and described circuit of power factor correction is connected with APFC booster circuit (3).
2. according to the described soft switching mode low-frequency square-wave xenon lamp electric ballast of claim 1, it is characterized in that: two electric capacity in the resonant capacitance (8) are in parallel with the metal-oxide-semiconductor in the soft-switching inversion circuit (4) respectively.
3. according to the described soft switching mode low-frequency square-wave xenon lamp electric ballast of claim 1, it is characterized in that: resonance sample circuit (7) constantly is made of two capacitor C 8, C9 series connection, is connected to described integrated control circuit (9) from intermediate point.
4. according to the described soft switching mode low-frequency square-wave xenon lamp electric ballast of claim 1, it is characterized in that: APFC booster circuit (3) output capacitance is made of C4, C5 series connection, and C4, C5 junction connect the HID xenon lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320155010 CN203151854U (en) | 2013-04-01 | 2013-04-01 | Soft-switch-mode low-frequency square-wave electronic ballast for xenon lamp |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320155010 CN203151854U (en) | 2013-04-01 | 2013-04-01 | Soft-switch-mode low-frequency square-wave electronic ballast for xenon lamp |
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| CN203151854U true CN203151854U (en) | 2013-08-21 |
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| CN 201320155010 Expired - Fee Related CN203151854U (en) | 2013-04-01 | 2013-04-01 | Soft-switch-mode low-frequency square-wave electronic ballast for xenon lamp |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103220871A (en) * | 2013-03-29 | 2013-07-24 | 黑龙江省工大国鑫光电科技股份有限公司 | HID (High Intensity Discharge) xenon lamp electronic ballast with soft switching mode and low-frequency square wave driving |
| WO2016078398A1 (en) * | 2014-11-19 | 2016-05-26 | 嘉兴雷明电子科技有限公司 | Variable light xed light source road illumination device having atmospheric purification function |
-
2013
- 2013-04-01 CN CN 201320155010 patent/CN203151854U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103220871A (en) * | 2013-03-29 | 2013-07-24 | 黑龙江省工大国鑫光电科技股份有限公司 | HID (High Intensity Discharge) xenon lamp electronic ballast with soft switching mode and low-frequency square wave driving |
| CN103220871B (en) * | 2013-03-29 | 2015-09-16 | 黑龙江省工大国鑫光电科技股份有限公司 | Sofe Switch mode low-frequency square-wave xenon lamp electric ballast |
| WO2016078398A1 (en) * | 2014-11-19 | 2016-05-26 | 嘉兴雷明电子科技有限公司 | Variable light xed light source road illumination device having atmospheric purification function |
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| C14 | Grant of patent or utility model | ||
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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: 20130821 Termination date: 20170401 |