CN2798503Y - High performance electronic ballast suitable for various voltage - Google Patents
High performance electronic ballast suitable for various voltage Download PDFInfo
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- CN2798503Y CN2798503Y CN 200520059193 CN200520059193U CN2798503Y CN 2798503 Y CN2798503 Y CN 2798503Y CN 200520059193 CN200520059193 CN 200520059193 CN 200520059193 U CN200520059193 U CN 200520059193U CN 2798503 Y CN2798503 Y CN 2798503Y
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Abstract
The utility model relates to a high-performance electronic ballast which is suitable for different voltage. The utility model mainly adopts the way that a boosted circuit controlled by a time-base integrated circuit is arranged between a full-wave rectifier and an inverter; the core part of a control circuit is formed by the time-base integrated circuit; a resistance value self-adjusting circuit is arranged in the control circuit. Because the utility model adopts the way that booster power supply composed of the time-base integrated circuit provides power for the electronic ballast, the wave crest coefficient of the current of a lamp is lower than 1.7 of the Chinese standard. The light effect of the lamp is enhanced, and the service life exceeds 5000 hours. Moreover, the utility model has the characteristics of low cost, simple circuit and high performance. The utility model is suitable for power supply with different voltage and frequencies all around the world.
Description
Technical field
The utility model relates to a kind of general electric ballast, refer to especially a kind of voltage scope of application wider electric ballast, belong to electronic device field, specifically refer to a kind of high-performance electronic ballast that is applicable to different voltages.
Background technology
Electric ballast is a kind of and the matching used novel energy-conserving electronic product of gaseous discharge lamp.After entering the eighties, the developing rapidly of electric ballast.At the nineties initial stage, the unit of China's development and production electric ballast is increasing.Because the technology starting point of exploitation electric ballast is lower, so compare with developed country, there is big gap in homemade electric ballast.This product does not solve the problem that exists at aspects such as technical performance and reliabilities fully in China at present.Especially concerning high strength high power discharge electric ballast, do not enter the practical stage yet.The product of major part electric ballast production producer, the system power factor rests on the lower level.Though the big factory of minority adopts passive power factor correcting circuit, its line power factor can reach the H level requirement of GB15143 and GB/T15144, but still be difficult to take into account the comprehensive parameters index of electric ballast, compare etc. as source current harmonic content, line power factor and lamp current crest.Though is consistent owing to reduce current harmonic content with improving power factor, uniformity is preferably arranged in the enforcement of technical measures, but suppress current harmonic content and reduce the lamp current crest than mutual contradiction often, thereby the contradiction between these two parameters often needs to adopt APFC APFC (Arrive Power Factor Correction) technology solves, and this must pay the cost on the cost.Along with the development at full speed of microelectric technique, make APFC circuit integration become possibility by the discrete component design.At 20th century the mid-80, Siemens Company takes the lead in having released electric ballast APFC controller IC, and this application-specific integrated circuit (ASIC) only need add a few components, just can form the APFC pre-regulator.Famous in the world semiconductor manufacturer, this adhesive integrated circuit of the Development and Production of all falling over each other.Price from international market in 1985 reaches 50 dollars, has dropped to about 20 dollars of present international market.Owing to be subjected to the restriction of domestic market ability to bear, adopt the electric ballast of APFC technology actually rare.
In sum, existing electric ballast mid and low-end products exist that the system power factor is on the low side, job insecurity, useful life is short and combination property is relatively poor deficiency, though and high-end product improves a lot on performance, but often cost is also comparatively expensive, can't satisfy the needs in market, the said goods also exists and is suitable for the narrower deficiency of voltage range.
Summary of the invention
The purpose of this utility model is exactly to have aimed at the huge domestic and international market in this field, utilizes cheap time-base integrated circuit 555 or 556 to be combined into dependable performance, the APFC controller that technical indicator is first-class cleverly.And be used in the electric ballast, make the comprehensive technical indexes of electric ballast all reach and surpass GB15143-94 " fluorescent tube requires and safety requirements with the alternating electron ballast is general " and two national standards of GB/T 15144-94 " fluorescent tube alternating electron ballast performance requirement " that State Bureau of Technical Supervision issued in July, 1994, the characteristics that have suitable voltage range broad simultaneously overcome the deficiencies in the prior art effectively.
The purpose of this utility model realizes in the following manner:
A kind of high-performance electronic ballast that is applicable to different voltages, consist predominantly of custom circuits such as filter, full-wave rectifier, inverter, output network, it is characterized in that being provided with booster circuit between full-wave rectifier and inverter, this booster circuit is controlled by the control circuit of being made up of time-base integrated circuit and corresponding output pulse width adjustment circuit;
Three item sign indicating numbers are 555 or 556 integrated circuit behind the above-mentioned time-base integrated circuit employing product type, and the output pulse width of its output is adjusted circuit by output pulse width and adjusted;
Above-mentioned output pulse width is adjusted the non-steady-state oscillation circuit of the EDM Generator of Adjustable Duty Ratio that circuit is made up of one group of diode and resistance and resistance value automatic circuit and electric capacity, in this circuit, diode D10, resistance R 11 series connection backs and resistance value automatic circuit are connected in parallel between pin 2, pin 6 and the pin 7 of time-base integrated circuit, and are connected on the electric ballast work loop with capacitor C 10 and resistance R 12;
Form by sample resistance R9, R10, sampling transistor Q4, reference diode D9 and optical coupler U at above-mentioned resistance value automatic circuit, wherein reference diode D9 is bound up on the emitter of sampling transistor Q4, and the collector electrode of sampling transistor Q4 and the luminous tube of optical coupler link;
Above-mentioned booster circuit is made up of boost inductance T1, booster diode D5, filter capacitor C5 and boosted switch transistor Q1, wherein boost inductance, booster diode are connected between full-wave rectifier and the inverter, filter capacitor and boosted switch transistor are connected in parallel on the booster diode two ends, and the boosted switch transistor links by output 3 pin of pulse transformer and time-base integrated circuit;
In foregoing circuit, its basis set becomes circuit and corresponding output pulse width to adjust the operating voltage of the control circuit of circuit composition, is to obtain by increase a leeched line circle winding on electric ballast outputting inductance T3.
Description of drawings
Fig. 1 is a high-performance electronic ballast circuit diagram of the present utility model;
Fig. 2 is a resistance value automatic circuit schematic diagram of the present utility model;
Fig. 3 is a booster circuit schematic diagram of the present utility model;
Fig. 4 is the operating voltage acquisition cuicuit schematic diagram of control circuit of the present utility model.
The specific embodiment explanation
Given circuit diagram is a kind of embodiment of the present utility model in the above-mentioned accompanying drawing.Below in conjunction with drawings and Examples, operation principle of the present utility model and structure are described in detail as follows:
The high-performance electronic ballast that is applicable to different voltages of the present utility model, mainly be between the full-wave rectifier and inverter of conventional electrical ballast circuit, be provided with the booster circuit of the control circuit control of forming by time-base integrated circuit and corresponding output pulse width adjustment circuit.With the core of time-base integrated circuit 555 or 556 composition control circuits, utilized the feature of this integrated circuit cleverly, through the combination of science, realize the changes of time-base integrated circuit 555 or 556 output high level and low level burst length width.This control circuit is made up of time-base integrated circuit, output pulse width adjustment circuit, operating voltage acquisition cuicuit.
Wherein, the output pulse width of time-base integrated circuit is adjusted circuit and is formed (as shown in Figure 2) by the resistance value automatic circuit, its operation principle is: diode D10 among Fig. 2, resistance R 11, capacitor C 10 and by sample resistance R9, R10, sampling transistor Q4, the resistance value automatic circuit that reference diode D9 and optical coupler U form is formed the non-steady-state oscillation circuit of EDM Generator of Adjustable Duty Ratio, after the energized, power supply is through R12, the passage of U charges to capacitor C 10, the crus secunda of time-base integrated circuit IC and the 6th pin are electronegative potential, time-base integrated circuit resets, time-base integrated circuit IC tripod output high potential, the pulse that modulates, deliver to the power switch transistor conducting of boosting by pulse transformer; (the supply voltage here is meant the direct voltage for time-base integrated circuit IC that the capacitor C two ends obtain when capacitor C 10 both end voltage rise to 2/3 time-base integrated circuit IC supply voltage, down together), time-base integrated circuit IC resets, time-base integrated circuit IC tripod output electronegative potential,, deliver to the power switch transistor that boosts and end the pulse that modulates by pulse transformer.At this moment time-base integrated circuit IC internal discharge pipe conducting, be to be a low group path between IC the 7th pin and first pin, at this moment, the electric charge that capacitor C 10 stores to 7 discharges of integrated circuit (IC) pin, descends the voltage at capacitor C two ends, by D10, R11 when voltage drops to 1/3 integrated circuit (IC) voltage, time-base integrated circuit IC is reset again, integrated circuit (IC) tripod output high potential the pulse that modulates, is delivered to the power switch transistor conducting of boosting by pulse transformer.So the resistance value of change R11 or optical coupler U has promptly changed the time ratio to capacitor C 10 chargings and discharge, but do not change the cycle of oscillation of circuit.Obviously, when we changed optical coupler U resistance value, capacitor C 10 charge constants strengthened, and capacitor C 10 discharge time constants reduce, and promptly the duty ratio of integrated circuit (IC) strengthens, but remains unchanged cycle of oscillation.The resistance value automatic circuit (as shown in Figure 2) that is applicable to different voltages is exactly to utilize above-mentioned principle and design.This circuit is made up of sample resistance R9, R10, sampling transistor Q4, reference diode D9 and optical coupler U, and wherein reference diode D9 is bound up on the emitter of sampling transistor Q4, and the collector electrode of sampling transistor Q4 and the luminous tube of optical coupler link.When work, sample resistance R9, R10 is according to the conversion of voltage in the circuit of electronic ballast, for sampling transistor Q4 provides different electric currents, and sampling transistor Q4 is through providing the electric current of variation to optical coupler U with reference diode D9 after relatively, optical coupler U changes the internal resistance of self receiving terminal (in optical coupler with the change of electric current, electric current increases, then luminous tube brightness increases, its receiving terminal internal resistance reduces, the integrated circuit (IC) output pulse width is corresponding to narrow down, otherwise then corresponding broadening), corresponding change integrated circuit (IC) output pulse width, and keep output current constant of electric ballast by booster circuit, thereby this electric ballast is applicable on the circuit of different voltages.Because the output current duty ratio that makes integrated circuit (IC) by control circuit is greater than more than 90%, the booster circuit by APFC can make electric ballast environment alternating voltage from 90 volts to 250 volts, and stable electric ballast direct-current working volts all can be provided.Therefore, utilize electric ballast of the present invention, applicable to the power supply of different voltages, frequency all over the world.
Booster circuit (as shown in Figure 3) is made up of boost inductance L1, booster diode D5, filter capacitor C5 and boosted switch transistor Q1, its operation principle is based on the physical relation between boost inductance L1 electric current and the voltage: when power switch transistor Q1 conducting, booster diode D5 then ends, and filter capacitor C5 discharges by ballast circuit; When power switch transistor Q1 was shutoff by conducting transition, the sudden change electromotive force of boost inductance L1 made booster diode D5 forward bias and conducting, and the energy storage among the L1 discharges through booster diode D5, and filter capacitor C5 is charged.Because boosted switch transistor Q1 and booster diode D5 alternate conduction make the rectifier diode output current through boost inductance L1 continuous flow, make rectifier diode in the half period of alternating voltage, the angle of flow is tending towards 180 degree, and its line power factor is near 1.
Because it is be to adopt time-base integrated circuit as the core, its operating voltage is the energy operate as normal between 5 volts to 24 volts, and is more extensive than the voltage that general integrated circuit is suitable for, very little to alternating current fluctuation influence.Provide the operating voltage of integrated circuit to adopt special method to obtain its operating voltage (as shown in Figure 4); its operating voltage is the ingenious electric ballast outputting inductance L2 that utilizes; doing a leeched line circle winding carries to the integrated circuit operating voltage; owing to be to obtain power supply from the electric ballast outputting inductance; obtain the integrated circuit power supply than the step-down of common use resistance; want reliable and safety; and can be when abnormal conditions appear in electric ballast; inductance L 2 no-voltages output when electric ballast is not worked; so stop to supply with the power supply of time-base integrated circuit automatically, thereby protected the time-base integrated circuit of a core control not to be damaged.
Because PPFC (Passive Power Factor Correction) (PPFC) circuit in the existing electric ballast technology, exist lamp current crest coefficient and be higher than GB 1.7, light efficiency is low, the deficiency of poor reliability, the utility model is by being applied in time-base integrated circuit (555 or 556) in the electric ballast cleverly, as the Active Power Factor Correction APFC core control technology of electric ballast, thereby the deficiencies in the prior art have been overcome effectively.Adopt high-performance electronic ballast of the present utility model, the sub-ballast power supply because the booster power of the high-frequency work that time-base integrated circuit is formed is powered, just can reach good filter effect with less filter capacitor, make lamp current crest coefficient be lower than below 1.7 of GB, the light efficiency of lamp improves, and useful life was above 5000 hours.Relatively to have a cost low with product of the same type, the simple and high performance characteristics of circuit.
Homemade electric ballast APFC technology is ingenious answers land used to improve, and electric ballast is developed to integrated, modularization, multi-functional, highly reliable, long-life and high-power direction, and can occupy a tiny space in the competition of international market.
Claims (6)
1, a kind of high-performance electronic ballast that is applicable to different voltages, consist predominantly of custom circuits such as filter, full-wave rectifier, inverter, output network, it is characterized in that being provided with booster circuit between full-wave rectifier and inverter, this booster circuit is controlled by the control circuit of being made up of time-base integrated circuit and corresponding output pulse width adjustment circuit.
2, the high-performance electronic ballast that is applicable to different voltages according to claim 1, it is characterized in that it is 555 or 556 integrated circuit that above-mentioned time-base integrated circuit adopts three item sign indicating numbers behind the product type, the output pulse width of its output is adjusted circuit by output pulse width and is adjusted.
3, the high-performance electronic ballast that is applicable to different voltages according to claim 1, it is characterized in that above-mentioned output pulse width adjusts the non-steady-state oscillation circuit of the EDM Generator of Adjustable Duty Ratio that circuit is made up of one group of diode, resistance and resistance value automatic circuit and electric capacity, in this circuit, diode D10, resistance R 11 series connection backs and resistance value automatic circuit are connected in parallel between pin 2, pin 6 and the pin 7 of time-base integrated circuit, and are connected on the electric ballast work loop with capacitor C 10 and resistance R 12.
4, the high-performance electronic ballast that is applicable to different voltages according to claim 1, it is characterized in that forming by sample resistance R9, R10, sampling transistor Q4, reference diode D9 and optical coupler U at above-mentioned resistance value automatic circuit, wherein reference diode D9 is bound up on the emitter of sampling transistor Q4, and the luminous tube of the collector electrode of sampling transistor Q4 and optical coupler U links.
5, the high-performance electronic ballast that is applicable to different voltages according to claim 1, it is characterized in that above-mentioned booster circuit is made up of boost inductance L1, booster diode D5, filter capacitor C5 and boosted switch transistor Q1, wherein boost inductance L1, booster diode D5 are connected between full-wave rectifier and the inverter, filter capacitor C5 and boosted switch transistor Q1 are connected in parallel on booster diode D5 two ends, and the boosted switch transistor links by output 3 pin of pulse transformer and time-base integrated circuit.
6, according to the described high-performance electronic ballast that is applicable to different voltages of claim 1 to 5, it is characterized in that in foregoing circuit, its basis set becomes circuit and corresponding output pulse width to adjust the operating voltage of the control circuit of circuit composition, is to obtain by increase a leeched line circle winding on electric ballast outputting inductance L2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520059193 CN2798503Y (en) | 2005-06-06 | 2005-06-06 | High performance electronic ballast suitable for various voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520059193 CN2798503Y (en) | 2005-06-06 | 2005-06-06 | High performance electronic ballast suitable for various voltage |
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| Publication Number | Publication Date |
|---|---|
| CN2798503Y true CN2798503Y (en) | 2006-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520059193 Expired - Fee Related CN2798503Y (en) | 2005-06-06 | 2005-06-06 | High performance electronic ballast suitable for various voltage |
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| CN (1) | CN2798503Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113329536A (en) * | 2021-08-03 | 2021-08-31 | 深圳市北扶生物医疗科技有限公司 | Device for reducing combustion leakage rate of burned device |
-
2005
- 2005-06-06 CN CN 200520059193 patent/CN2798503Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113329536A (en) * | 2021-08-03 | 2021-08-31 | 深圳市北扶生物医疗科技有限公司 | Device for reducing combustion leakage rate of burned device |
| CN113329536B (en) * | 2021-08-03 | 2021-11-16 | 深圳市北扶生物医疗科技有限公司 | Device for reducing combustion leakage rate of burned device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |