CN203827592U - One or two feet fluorescent lamp electronic ballast - Google Patents
One or two feet fluorescent lamp electronic ballast Download PDFInfo
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- CN203827592U CN203827592U CN201420235044.8U CN201420235044U CN203827592U CN 203827592 U CN203827592 U CN 203827592U CN 201420235044 U CN201420235044 U CN 201420235044U CN 203827592 U CN203827592 U CN 203827592U
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- 239000003990 capacitor Substances 0.000 claims description 40
- 230000001681 protective effect Effects 0.000 claims description 14
- 230000002457 bidirectional effect Effects 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000005286 illumination Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000004804 winding Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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Abstract
The product incorporating the design is a one-or-two feet fluorescent lamp electronic ballast, belonging to the illumination electronic technology field. The one-or-two feed fluorescent lamp electronic ballast can control the THD value (harmonic distortion) caused by current harmonic distortion, increases power factors of the circuit and performs quick starting up under low temperature. The circuit adopts a one-or-two feet output mode which is applicable to the needs of various users and especially can realize low harmonic distortion and high power factors, stabilizes the performance and prolongs the service life. By adopting the one-or-two feet output, the fault that one of the two groups of lamp filaments of the fluorescent tube is ruptured and then cannot illuminate can be eliminated.
Description
Technical field
The utility model belongs to lighting electronic technical field, is specifically related to a kind of single double-legged electronic ballast for fluoresent lamp.
Background technology
Harmonics of Input content, line power factor and the useful life of electronic ballast for fluoresent lamp, three important technical indicators, can control source current wave distortion, realize low harmonic distortion requirement and High Power Factor, increase the service life, be the important topic that technical staff researches and develops always.
Traditional electric ballast, conventionally adopt voltage feed type half-bridge inversion circuit, industrial-frequency alternating current, after full-bridge rectification inversion, become high-frequency electrical more than 20KHz, be used for starting and lighting fluorescent lamp tube, but, find THD (harmonic distortion) value that source current harmonic distortion affects through practice operation for many years, make power factor lower than 0.75, and 0.96 the differing greatly of national Specification; In addition, the temperature environment of negative value, affects the startup of fluorescent tube and lights, and has both caused power consumption penalty, has shortened again the useful life of fluorescent tube.
Summary of the invention
For the shortcoming of prior art, the utility model proposes a kind of single double-legged electronic ballast for fluoresent lamp, adjust mode with novel passive power factor, reach the power factor that improves circuit, realize the object starting fast at low temperatures.
A kind of single double-legged electronic ballast for fluoresent lamp, comprise power filter input protection circuit, full bridge driving circuit, AC energy feedback is by stream PEC circuit, line fault safety protective circuit, start output circuit and fluorescent lamp, wherein, the output of power filter input protection circuit connects the first input end of full bridge driving circuit, the output of line fault safety protective circuit connects the second input of full bridge driving circuit, the output of full bridge driving circuit connects the input of AC energy feedback by stream PEC circuit, AC energy feedback connects by the output of stream PEC circuit the input that starts output circuit, the output that starts output circuit connects fluorescent lamp.
Described AC energy feedback comprises the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the first diode, the second diode, the 3rd diode, the first electrochemical capacitor and the second electrochemical capacitor by stream PEC circuit, wherein, one end of the first electric capacity connects one end of negative electrode and first electrochemical capacitor of the first diode simultaneously, and is connected with full bridge driving circuit; The other end of the first electric capacity connects one end of the second electric capacity, and the other end of the second electric capacity connects anode, one end of the 3rd electric capacity and one end of the 4th electric capacity of the second diode simultaneously, and connects startup output circuit; The negative electrode of the second described diode connects one end of anode and second electrochemical capacitor of the first diode, the other end ground connection of the second electrochemical capacitor simultaneously; The other end of the first described electrochemical capacitor connects the negative electrode of the 3rd diode and the other end of the 3rd electric capacity, the plus earth of the 3rd diode simultaneously; The other end of the 4th described electric capacity connects full bridge driving circuit.
Described line fault safety protective circuit comprises the first resistance, the second resistance, the 3rd resistance, a bidirectional diode, a diode and an outputting inductance, wherein, one end of the first resistance connects full bridge driving circuit, the other end of the first resistance connects one end of bidirectional diode, the other end of bidirectional diode connects one end of the second resistance and one end of the 3rd resistance simultaneously, the other end ground connection of the second resistance, the other end of the 3rd resistance connects the negative electrode of diode, one end of anodic bonding outputting inductance one side of diode, the other end ground connection of this side of outputting inductance.
Described startup output circuit comprises an electric capacity; one end of this electric capacity connects AC energy feedback one end by stream PEC circuit and fluorescent lamp simultaneously; one end of outputting inductance opposite side in electric capacity other end while connection line failure safe protective circuit, the other end of outputting inductance opposite side connects a coil of full bridge driving circuit internal pulses transformer.
The utility model advantage:
A kind of single double-legged electronic ballast for fluoresent lamp of the utility model, THD (harmonic distortion) value that controllable current harmonic distortion affects, has improved the power factor of circuit, can start fast at low temperatures again, this circuit adopts the mode of single both feet output, being suitable for different user needs, mainly outstanding, realizes low harmonic distortion and High Power Factor, the stable performance life-span is long, adopt single both feet output, overcome two groups of filaments of fluorescent tube, wherein one group of shortcoming that fracture can not normally be lighted.
Brief description of the drawings
Fig. 1 is the single unit system structured flowchart of a kind of embodiment of the utility model;
Fig. 2 is the power filter input protection circuit schematic diagram of a kind of embodiment of the utility model;
Fig. 3 is the full bridge driving circuit schematic diagram of a kind of embodiment of the utility model;
Fig. 4 is that the AC energy of a kind of embodiment of the utility model is fed back the circuit theory diagrams by stream PEC;
Fig. 5 is the line fault safety protective circuit schematic diagram of a kind of embodiment of the utility model;
Fig. 6 is the startup output circuit schematic diagram of a kind of embodiment of the utility model.
Embodiment
Below in conjunction with accompanying drawing, a kind of embodiment of the utility model is described further.
As shown in Figure 1, a kind of single double-legged electronic ballast for fluoresent lamp, comprise power filter input protection circuit, full bridge driving circuit, AC energy feedback is by stream PEC circuit, line fault safety protective circuit, start output circuit and fluorescent lamp, wherein, as shown in Figure 2, the output c of power filter input protection circuit connects the input c (as shown in Figure 3) of full bridge driving circuit, as shown in Figure 5, the output (one end of resistance R 5) of line fault safety protective circuit connects second input (the control utmost point of T1) of full bridge driving circuit, as shown in Figure 3, the output e of full bridge driving circuit, G connects the input e of AC energy feedback by stream PEC circuit, G, as shown in Figure 4, AC energy feedback connects by the output H of stream PEC circuit the input H that starts output circuit, as shown in Figure 6, the output that starts output circuit connects fluorescent lamp.
As shown in Figure 4, described AC energy feedback comprises the first capacitor C 5, the second capacitor C 6, the 3rd capacitor C 7, the 4th capacitor C 8, the first diode D11, the second diode D12, the 3rd diode D13, the first electrochemical capacitor C11 and the second electrochemical capacitor C10 by stream PEC circuit, wherein, one end of the first capacitor C 5 connects one end of negative electrode and the first electrochemical capacitor C11 of the first diode D11 simultaneously, and is connected with the e end of full bridge driving circuit; The other end of the first capacitor C 5 connects one end of the second capacitor C 6, and the other end of the second capacitor C 6 connects anode, one end of the 3rd capacitor C 7 and one end of the 4th capacitor C 8 of the second diode D12 simultaneously, and connects the H end that starts output circuit; The negative electrode of the second described diode D12 connects one end of anode and the second electrochemical capacitor C10 of the first diode D11, the other end ground connection of the second electrochemical capacitor C10 simultaneously; The other end of the first described electrochemical capacitor C11 connects the negative electrode of the 3rd diode D13 and the other end of the 3rd capacitor C 7, the plus earth of the 3rd diode D13 simultaneously; The other end of the 4th described capacitor C 8 connects the G end of full bridge driving circuit.
As shown in Figure 5, described line fault safety protective circuit comprises the first resistance R 5, the second resistance R 7, the 3rd resistance R 6, a bidirectional diode D14, a diode D15 and an outputting inductance B2, wherein, one end of the first resistance R 5 connects the control utmost point of the inner T1 of full bridge driving circuit, the other end of the first resistance R 5 connects one end of bidirectional diode D14, the other end of bidirectional diode D14 connects one end of the second resistance R 7 and one end of the 3rd resistance R 6 simultaneously, the other end ground connection of the second resistance R 7, the other end of the 3rd resistance R 6 connects the negative electrode of diode D15, one end of anodic bonding outputting inductance B2 mono-side of diode D15, the other end ground connection of this side of outputting inductance B2.
As shown in Figure 6; described startup output circuit comprises a capacitor C 9; one end of this capacitor C 9 connects AC energy feedback by the H end of stream PEC circuit and one end of fluorescent lamp simultaneously; one end of outputting inductance B2 opposite side in 9 other ends while of capacitor C connection line failure safe protective circuit, the other end of outputting inductance B2 opposite side connects a coil B1a of full bridge driving circuit internal pulses transformer.
As shown in Figure 2, in the present embodiment, this single pin electronic ballast for fluoresent lamp, between rectifier bridge, adds tri-devices of L1, C1 and C2 at input AC220V, with electronics fire compartment wall form restriction EMI (Electromagnetic Interference).The electromagnetic interface filter of L1, C1 and C2 composition.L1 presents high impedance to common mode interference signal, and touches signal and source current presents high impedance to poor.So both prevent the decay to source current, and suppressed current noise.
Electromagnetic interface filter, is a kind of low pass filter, and because inductance plays choked flow effect to radio frequency, little electric capacity is bordering on like short circuit radio frequency, and radio frequency interference is reliably suppressed.The in the situation that of filter impedance and interference source impedance mismatching, interference source can be reflected back.Thereby effectively suppress the impact of interference source.Power supply has entered after full bridge rectifier D1～D4, the pulsating current of exporting.Through C3, R1 filter circuit (Fig. 2), the direct current of pulsation is shaped as to direct current stably.
As shown in Figure 3, in the present embodiment, direct current boosts through resistance R 2, the capacitor C 4 of integrating circuit, by bidirectional trigger diode D7 avalanche breakdown, through resistance R 4, diode D6, resistance R 3, diode D5, the concussion of pulse transformer B triggers, and makes Q1, Q2 saturation conduction, has formed full bridge inverter.
As shown in Figure 4, when the high frequency output current point after inversion boosting is lit a lamp pipe, by high-frequency energy feedback system, power factor is brought up to more than 0.96.High-frequency signal is by capacitor C 5, and capacitor C 6, from output, is taken out with the common point of tube cathode, the feedback circuit that process speed-sensitive switch D11, D12 and capacitor C 9 form, and control capacitance C3 terminal voltage, makes rectifier bridge voltage higher than C3 voltage.Improve the angle of flow of rectifier bridge diode, suppress source current wave distortion, make to exchange phase difference between the fundamental current of input and voltage and reduce to improve line power factor; Passive PFC (automatic power factor control), circuit is simple, successful.
As shown in Figure 5, protection part, in order to prevent the reasons such as line over-voltage, overcurrent, fluorescent tube open circuit, damages electric ballast.In the present embodiment, be provided with protection circuit in circuit, T1 is that controllable silicon is protection executive component; B1 auxiliary winding is the voltage detection device of protection circuit.After defeated out of order voltage signal is detected by B1, by diode D15 dead resistance R6, resistance R 7 dividing potential drop capacitor C 8 filtering.The voltage that draws 35V punctures D15, and resistance R 5 step-down current limlitings send fault-signal to the control utmost point of TI, again enabling signal is added in to the base stage of Q3 after T1 conducting; after Q3 conducting; the driving signal that cuts off semi-bridge inversion, electric ballast quits work, and has realized safeguard protection.
As shown in Figure 6, output, the elementary of B2 is the winding of output current limiting inductance, secondary is the sample of signal winding of protective circuit.Start circuit very simple, after switching on power, the high frequency voltage of inversion, is added in capacitor C 9, through the high pressure of the triggering for generating of overcharging, by the disruptive discharge of fluorescent tube the two poles of the earth, fluorescent tube is lighted.It had both solved double-legged filament pre-heating problem, had overcome again because of double-legged filament breaking, and can not start the shortcoming of lighting.Simply adjust through device numerical value, can, to the power of fluorescent tube, in 18W～40W, select.Output can be selected single pin, two kinds of modes of connection of both feet; In the present embodiment, the value of capacitor C 9 is 103, and the value of outputting inductance is that 1.3 millis are enjoyed.
Claims (4)
1. the double-legged electronic ballast for fluoresent lamp of list, it is characterized in that, comprise power filter input protection circuit, full bridge driving circuit, AC energy feedback is by stream PEC circuit, line fault safety protective circuit, start output circuit and fluorescent lamp, wherein, the output of power filter input protection circuit connects the first input end of full bridge driving circuit, the output of line fault safety protective circuit connects the second input of full bridge driving circuit, the output of full bridge driving circuit connects the input of AC energy feedback by stream PEC circuit, AC energy feedback connects by the output of stream PEC circuit the input that starts output circuit, the output that starts output circuit connects fluorescent lamp.
2. the double-legged electronic ballast for fluoresent lamp of list according to claim 1, it is characterized in that, described AC energy feedback comprises the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the first diode, the second diode, the 3rd diode, the first electrochemical capacitor and the second electrochemical capacitor by stream PEC circuit, wherein, one end of the first electric capacity connects one end of negative electrode and first electrochemical capacitor of the first diode simultaneously, and is connected with full bridge driving circuit; The other end of the first electric capacity connects one end of the second electric capacity, and the other end of the second electric capacity connects anode, one end of the 3rd electric capacity and one end of the 4th electric capacity of the second diode simultaneously, and connects startup output circuit; The negative electrode of the second described diode connects one end of anode and second electrochemical capacitor of the first diode, the other end ground connection of the second electrochemical capacitor simultaneously; The other end of the first described electrochemical capacitor connects the negative electrode of the 3rd diode and the other end of the 3rd electric capacity, the plus earth of the 3rd diode simultaneously; The other end of the 4th described electric capacity connects full bridge driving circuit.
3. the double-legged electronic ballast for fluoresent lamp of list according to claim 1, it is characterized in that, described line fault safety protective circuit comprises the first resistance, the second resistance, the 3rd resistance, a bidirectional diode, a diode and an outputting inductance, wherein, one end of the first resistance connects full bridge driving circuit, the other end of the first resistance connects one end of bidirectional diode, the other end of bidirectional diode connects one end of the second resistance and one end of the 3rd resistance simultaneously, the other end ground connection of the second resistance, the other end of the 3rd resistance connects the negative electrode of diode, one end of anodic bonding outputting inductance one side of diode, the other end ground connection of this side of outputting inductance.
4. the double-legged electronic ballast for fluoresent lamp of list according to claim 1; it is characterized in that; described startup output circuit comprises an electric capacity; one end of this electric capacity connects AC energy feedback one end by stream PEC circuit and fluorescent lamp simultaneously; one end of outputting inductance opposite side in electric capacity other end while connection line failure safe protective circuit, the other end of outputting inductance opposite side connects a coil of full bridge driving circuit internal pulses transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420235044.8U CN203827592U (en) | 2014-05-08 | 2014-05-08 | One or two feet fluorescent lamp electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420235044.8U CN203827592U (en) | 2014-05-08 | 2014-05-08 | One or two feet fluorescent lamp electronic ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203827592U true CN203827592U (en) | 2014-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420235044.8U Expired - Fee Related CN203827592U (en) | 2014-05-08 | 2014-05-08 | One or two feet fluorescent lamp electronic ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203827592U (en) |
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2014
- 2014-05-08 CN CN201420235044.8U patent/CN203827592U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20140910 |