CN2612206Y - Electronic ballast of long service fluorescent lamp - Google Patents
Electronic ballast of long service fluorescent lamp Download PDFInfo
- Publication number
- CN2612206Y CN2612206Y CN 03243312 CN03243312U CN2612206Y CN 2612206 Y CN2612206 Y CN 2612206Y CN 03243312 CN03243312 CN 03243312 CN 03243312 U CN03243312 U CN 03243312U CN 2612206 Y CN2612206 Y CN 2612206Y
- Authority
- CN
- China
- Prior art keywords
- tube
- fluorescent tube
- utility
- model
- electronic ballast
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model relates to a fluorescence lamp electric ballast with long service life, substantially composed of a L#-[3], TR, R, C or the like, wherein the L#-[3], TR, R#-[13], C#-[10] are the key portions of the utility model. The utility model has a resonant start circuit to be laminated with a polar board remote capacitor in tube to resonantly heat filament to start tube. Via the current limiting function of R#-[9] and R#-[10], the tube can normally work stably. And since two end filaments in the tube are powered at same time, the heated temperature of filament is uniform to avoid heating dead point, thereby improving the service lives of fluorescence lamp electric ballast and tube.
Description
The utility model relates to a kind of electronic ballast for fluoresent lamp, especially a kind of long-life type electronic ballast for fluoresent lamp that can prolong electric ballast and fluorescent tube useful life.
The common feature of existing electronic ballast for fluoresent lamp is to adopt circuit common, and its operation principle is monolaterally at the fluorescent tube two ends to advance the electric forming circulating current and light fluorescent lamp.The electric leg of advancing of two symmetries is respectively arranged at the fluorescent tube two ends, advance electricity to cause in the fluorescent tube filament to be heated inhomogeneous because of monolateral, form " thermal death-point " in lamp tube ends easily, once there is the filament of an end to break, this fluorescent tube just can not re-use.Thereby, influenced useful life of fluorescent tube.In addition, the abnormity protection function imperfection of electric ballast, and directly influence useful life of electric ballast.
The purpose of this utility model provides a kind of long-life type electronic ballast for fluoresent lamp.It can not only prolong the useful life of electric ballast, and can also prolong the useful life of fluorescent tube.
The purpose of this utility model is achieved in that and has adopted High Power Factor filter circuit and time-base integrated circuit in ballast, has constituted multi-harmonic-oscillations output pulse, and frequency is 30KH2, has reduced harmonic content, has improved power factor.And be provided with the overcurrent abnormity protection function, thereby the working life that prolongs electric ballast.
On the output circuit of ballast, adopted the inner superimposed resonance startup of the plates capacitance formula work that constitutes of resonant capacitance and fluorescent tube than long distance, the filament two ends are heated evenly, eliminate " thermal death-point " phenomenon on the filament, thereby prolonged the useful life of fluorescent tube.Even all broken in the filament one or both ends in the fluorescent tube, on this utility model, all can make its fluorescent tube normal illumination, till fluorescent tube is thoroughly aging.
Adopt such scheme, can prolong the useful life of electronic ballast for fluoresent lamp and fluorescent tube, and can make the fracture of wire fluorescent tube obtain utilizing.
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is a circuit diagram of the present utility model;
Fig. 2 is the fluorescent tube of the present utility model circuit diagram that starts to work.
The circuit of Fig. 1 mainly suppresses (EMI), bridge rectifier, active power filtering and power factor effect by radio frequency interference, and just (PFC), multi-harmonic-oscillations, over-voltage over-current protection etc. are formed.TR, RV constitute sudden change overpressure protection circuit; EMI can suppress the interference of the high-frequency oscillation signal of this circuit to electrical network, improves the line power factor; AC power is through D
1-D
4Behind the bridge rectifier, become the pulsating direct current of 300V, pass through by L again
2, D
5, V
3, C
2, C
3After the active power filtering of forming and power factor just imitate (PFC) circuit, become galvanic current and supply with oscillating circuit, the effect of PFC is the power factor that improves whole electric ballast, reduce high-frequency harmonic content, increase the conducting angle of rectifier diode, make to exchange and import trend continuously, and follow the variation that exchanges input, the inhibition current harmonics distorts and improves the power factor of circuit.Work as V
3During conducting, D
5End C
3To load discharge.Because the whole output of bridge does not insert large bulk capacitance, so output is the full-wave direct current pulsating voltage, passes through L
2The envelope of high-frequency current, following the tracks of AC-input voltage all the time is sinusoidal waveform substantially, thus current distortion very little (＜20%), system power factor＞0.98, lamp current fluctuation coefficient＜1.6.DC power supply enters under the effect of 555 multi-resonant oscillating circuits of forming, and is reverse into 30KH
2High-frequency alternating current through N
1, N
2, N
3Effect, produce the two-way equal and opposite in direction, the high frequency ac signal that phase place is opposite acts on V respectively
1, V
2, make V
1, V
2Conducting in turn, V
1, V
2Work the power amplification effect of recommending, the high-frequency alternating current after the amplification is through the L of Fig. 2
3, C
9Supply with fluorescent tube and start operating circuit, resonance starts to be made up of TR, C, R etc., make the outside interior superimposed resonance point of polar-plate-type long distance electric capacity of electric capacity and the fluorescent tube starter work of lighting a lamp that starts, make the lamp tube ends position simultaneously, filament heating temperature trend evenly, eliminated the phenomenon of " thermal death-point ", the useful life of having improved fluorescent tube.If the fluorescent tube of fracture of wire is arranged, can continue again to use.
Claims (1)
1, a kind of long-life type electronic ballast for fluoresent lamp is characterized in that: L
3, TR, R
13, C
10Constitute the resonance start-up circuit, work with forming the superimposed resonance heat filament of polar-plate-type long distance electric capacity conducting starter in the fluorescent tube, because R
9, R
10Deng metering function, make fluorescent tube be stablized operate as normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03243312 CN2612206Y (en) | 2003-03-23 | 2003-03-23 | Electronic ballast of long service fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03243312 CN2612206Y (en) | 2003-03-23 | 2003-03-23 | Electronic ballast of long service fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2612206Y true CN2612206Y (en) | 2004-04-14 |
Family
ID=34168985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03243312 Expired - Fee Related CN2612206Y (en) | 2003-03-23 | 2003-03-23 | Electronic ballast of long service fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2612206Y (en) |
-
2003
- 2003-03-23 CN CN 03243312 patent/CN2612206Y/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 | ||
| 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 |