CN102281696A - Electronic ballast for wide voltage, micro power, high efficiency and straight tube fluorescent lamp - Google Patents
Electronic ballast for wide voltage, micro power, high efficiency and straight tube fluorescent lamp Download PDFInfo
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- CN102281696A CN102281696A CN2011101444684A CN201110144468A CN102281696A CN 102281696 A CN102281696 A CN 102281696A CN 2011101444684 A CN2011101444684 A CN 2011101444684A CN 201110144468 A CN201110144468 A CN 201110144468A CN 102281696 A CN102281696 A CN 102281696A
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- power factor
- factor correction
- fluorescent lamp
- electronic ballast
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Abstract
The invention discloses an electronic ballast for a wide voltage, micro power, high efficiency and straight tube fluorescent lamp, which comprises an over-voltage protection circuit, the over-voltage protection circuit is connected with an EMI filter circuit for efficiently restraining electromagnetic interference and electromagnetic radiation, a rectifying circuit, a power factor correction circuit and a resonant output circuit in sequence, and a control circuit for providing high end and low end drive control is connected between the power factor correction circuit and the resonant output circuit. The electronic ballast adds the control circuit behind the power factor correction circuit for providing high end and low end drive control, and reduces the harmonic interference of the electronic ballast; because the power factor of the power factor correction circuit reaches more than 0.9, the energy-saving effect is greatly improved. The electronic ballast can be widely applied for the straight tube fluorescent lamp field.
Description
Technical field
The present invention relates to a kind of electric ballast, the efficient straight tube fluorescent lamp electric ballast of the little power consumption of especially a kind of wide voltage.
Background technology
Energy crisis has become global common problem, and the sense of urgency of energy savings makes many companies be devoted to the research of energy-conserving light source and electronic ballast for fluoresent lamp.The quality of the electric ballast of existing DC fluorescent lamp is very different on the market, and main cause is: harmonic content is big, and ballast own loss height, device loss cause with the life-span limited.Along with the fast development of microelectric technique, electric ballast also has the space that further promotes aspect energy-conservation.
Summary of the invention
The technical problem to be solved in the present invention is: the straight tube fluorescent lamp that a kind of own loss is low, power factor is high electron rectifier is provided.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
The efficient straight tube fluorescent lamp electric ballast of the little power consumption of a kind of wide voltage; comprise overvoltage crowbar; described overvoltage crowbar is connected with electromagnetic interference filter circuit, rectification circuit, circuit of power factor correction and the resonance output circuit of effective inhibition electromagnetic interference and electromagnetic radiation in turn, is connected with the control circuit that high low side drive controlling is provided between described circuit of power factor correction and the resonance output circuit.
Be further used as preferred embodiment, also be connected with abnormity protection circuit between described control circuit and the resonance output circuit.
Be further used as preferred embodiment, described control circuit is the 8 pin integrated circuits that integrated VDD processing, scanning and the control of aura time, vibration and Dead Time control, high pressure displacement and high low side drive output.
Be further used as preferred embodiment, described circuit of power factor correction is a valley fill type power factor correction filter circuit.
The invention has the beneficial effects as follows: the present invention is by increasing the control circuit of realizing VDD control, vibration, frequency scanning, aura time, Dead Time, high voltage level displacement, high low side drive controlling after circuit of power factor correction, frequency to oscillator scans to low side from high-end, scan period is the warm-up time of fluorescent lamp, when scanning the resonance frequency of resonance output circuit, tube starting and with frequency lock has reduced the Harmonic Interference of ballast; The ON time that the present invention utilizes " not exclusively promptly part is level and smooth " of capacitor to prolong rectifier diode by circuit of power factor correction, make the angle of flow of diode reach 120 ° approximately, electric current is that zero Dead Time shortens to 1/3 of the half period, and the power factor of circuit is reached more than 0.9; The present invention is by abnormity protection circuit, during aging or filament short circuit, makes the oscillating circuit failure of oscillation at fluorescent tube, realizes circuit protection.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further:
Fig. 1 is the theory diagram of electric ballast of the present invention;
Fig. 2 is the circuit theory diagrams of electric ballast specific embodiment of the present invention;
Fig. 3 is the functional-block diagram of electric ballast specific embodiment control circuit of the present invention.
Embodiment
With reference to Fig. 1; the efficient straight tube fluorescent lamp electric ballast of the little power consumption of a kind of wide voltage; comprise overvoltage crowbar 1; described overvoltage crowbar 1 is connected with electromagnetic interference filter circuit 2, rectification circuit 3, circuit of power factor correction 4 and the resonance output circuit 6 of effective inhibition electromagnetic interference and electromagnetic radiation in turn; be connected with the control circuit 5 that high low side drive controlling is provided between described circuit of power factor correction 4 and the resonance output circuit 6, also be connected with abnormity protection circuit 7 between described control circuit 5 and the resonance output circuit 6.
Below with reference to Fig. 2, concrete formation of circuit in the specific embodiment of electric ballast and operation principle are done further introduction:
Overvoltage crowbar 1 is made up of fuse RF, piezo-resistance R1 in the present embodiment, can anti-lightning strike, sudden change high pressure, overcurrent and overvoltage.Pressure-sensitive R1 short circuit or circuit working unusually all make fuse RF fusing when circuit runs into thunderbolt or sudden change high pressure (470V) at work, thus protective circuit.
Electromagnetic interference (EMI) filter circuit 2 comprises capacitor C 1, C2, C3, C4 and transformer L1 in the present embodiment, can effectively suppress electromagnetic interference and electromagnetic radiation that circuit produces.
Circuit of power factor correction 3 adopts the valley fill type power factor correction filter circuit of being made up of diode D6, D7, D8, D9 and capacitor C 7, C8 in the present embodiment, the ON time of utilizing " not exclusively promptly part level and smooth " of capacitor to prolong rectifier diode, making the angle of flow of diode reach 120 ° of electric currents approximately is that zero Dead Time shortens to 1/3 of the half period, and the power factor of circuit is reached more than 0.9.
Resonance output circuit 6 in the present embodiment is formed resonance, current limliting and output circuit by inductance L 2 and capacitor C 14, C5, C6.Inductance L 2, capacitor C 14 are resonant tank, supply with the high-frequency alternating current of 30～45KHz to fluorescent tube by the high frequency square wave of 5 pin of IC1 output behind inductance L 2, capacitor C 14 resonance, and inductance L 2 is the current-limiting inductance of fluorescent lamp simultaneously; Capacitor C 5, C6 are the path capacitance of fluorescent lamp.
Because have only control circuit IC1, resistance R 2 and inductance L 2 to consume few some power in the circuit, efficient is high, actual measurement circuit internal power consumption is lower than 0.5W(generally about 0.2～0.4W).With respect to former Inductive ballast T8 fluorescent lamp economize on electricity 50% or more (the T8 fluorescent lamp that is used for substituting length and is 600mm only needs to consume luminous flux that the 11W electric energy then can reach former lamp, be used for substituting T8 that length is 900mm or T5 fluorescent lamp only needs to consume luminous flux that the 15W electric energy then can reach former lamp, is used for alternative length the T8 or the T5 fluorescent lamp that are 1200mm and only need to consume the light efficiency that 20～22W electric energy then can reach former Inductive ballast T8 fluorescent lamp).
More than be that preferable enforcement of the present invention is specified, but the invention is not limited to described embodiment, those of ordinary skill in the art make all equivalent variations or replacement also can doing under the prerequisite of spirit of the present invention, the distortion that these are equal to or replace all is included in the application's claim institute restricted portion.
Claims (4)
1. efficient straight tube fluorescent lamp electric ballast of the little power consumption of wide voltage; comprise overvoltage crowbar (1); described overvoltage crowbar (1) is connected with electromagnetic interference filter circuit (2), rectification circuit (3), circuit of power factor correction (4) and the resonance output circuit (6) of effective inhibition electromagnetic interference and electromagnetic radiation in turn, it is characterized in that: be connected with the control circuit (5) that high low side drive controlling is provided between described circuit of power factor correction (4) and the resonance output circuit (6).
2. electric ballast according to claim 1 is characterized in that: also be connected with abnormity protection circuit (7) between described control circuit (5) and the resonance output circuit (6).
3. electric ballast according to claim 1 and 2 is characterized in that: described control circuit (5) is the 8 pin integrated circuits that integrated VDD processing, scanning and the control of aura time, vibration and Dead Time control, high pressure displacement and high low side drive output.
4. electric ballast according to claim 1 and 2 is characterized in that: described circuit of power factor correction (4) is a valley fill type power factor correction filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101444684A CN102281696A (en) | 2011-05-31 | 2011-05-31 | Electronic ballast for wide voltage, micro power, high efficiency and straight tube fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101444684A CN102281696A (en) | 2011-05-31 | 2011-05-31 | Electronic ballast for wide voltage, micro power, high efficiency and straight tube fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102281696A true CN102281696A (en) | 2011-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101444684A Pending CN102281696A (en) | 2011-05-31 | 2011-05-31 | Electronic ballast for wide voltage, micro power, high efficiency and straight tube fluorescent lamp |
Country Status (1)
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| CN (1) | CN102281696A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102595736A (en) * | 2012-03-01 | 2012-07-18 | 杭州乐图光电科技有限公司 | LED (Light-Emitting Diode) driving power supply compatible to electronic ballast |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2316542Y (en) * | 1998-01-21 | 1999-04-28 | 葛瑞柱 | High-efficient field effect neon lamp |
| CN1543755A (en) * | 2001-06-22 | 2004-11-03 | �¬ | Electronic ballast |
| CN201204737Y (en) * | 2007-08-27 | 2009-03-04 | 北京为华新光电子有限公司 | Electronic energy-saving device for high-frequency phase-shifting type high-pressure sodium lamp |
| CN201674714U (en) * | 2010-05-25 | 2010-12-15 | 合肥大明电子科技有限公司 | Electronic ballast with MCU intelligent protection |
-
2011
- 2011-05-31 CN CN2011101444684A patent/CN102281696A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2316542Y (en) * | 1998-01-21 | 1999-04-28 | 葛瑞柱 | High-efficient field effect neon lamp |
| CN1543755A (en) * | 2001-06-22 | 2004-11-03 | �¬ | Electronic ballast |
| CN201204737Y (en) * | 2007-08-27 | 2009-03-04 | 北京为华新光电子有限公司 | Electronic energy-saving device for high-frequency phase-shifting type high-pressure sodium lamp |
| CN201674714U (en) * | 2010-05-25 | 2010-12-15 | 合肥大明电子科技有限公司 | Electronic ballast with MCU intelligent protection |
Non-Patent Citations (1)
| Title |
|---|
| PHILIPS SEMICONDUCTORS: "UBA2024 Half-bridge power IC for CFL lamps", 《DATA SHEET》, 13 August 2003 (2003-08-13), pages 2 - 3 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102595736A (en) * | 2012-03-01 | 2012-07-18 | 杭州乐图光电科技有限公司 | LED (Light-Emitting Diode) driving power supply compatible to electronic ballast |
| CN102595736B (en) * | 2012-03-01 | 2014-09-17 | 杭州乐图光电科技有限公司 | LED (Light-Emitting Diode) driving power supply compatible to electronic ballast |
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| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20160120 |
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| C20 | Patent right or utility model deemed to be abandoned or is abandoned |