CN2712044Y - Electronic ballast for fluorescent - Google Patents
Electronic ballast for fluorescent Download PDFInfo
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- CN2712044Y CN2712044Y CN 200420034023 CN200420034023U CN2712044Y CN 2712044 Y CN2712044 Y CN 2712044Y CN 200420034023 CN200420034023 CN 200420034023 CN 200420034023 U CN200420034023 U CN 200420034023U CN 2712044 Y CN2712044 Y CN 2712044Y
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- electronic ballast
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Abstract
The utility model discloses an electronic ballast for a fluorescent lamp. The primary coil of an impulse transformer has *** turns in design, and the primary coil in an optimal embodiment has * turns. Two secondary coils are symmetrical and respectively have * turns; the two secondary coils are respectively connected with power triodes. After repeatedly doing experiments, when the numbers of turns of the secondary coils are * turns, the power triodes are uneasily damaged. In the design, the emitting electrodes of the power triodes are not connected with resistors, a current follow-up circuit is adopted behind a bridge rectifier circuit to replace a large electrochemical capacitor filtering circuit used in a general electronic ballast, and the power factor is improved. The circuit is skillfully connected with a diode to protect the power triodes, and the reliability of the circuit is improved. The electronic ballast for the fluorescent lamp has the advantages that the lifespan of the electronic ballast for the fluorescent lamp improves the lifespan and has high durability. The power factor of the power supply lines is improved to 0.93. The electronic ballast for the fluorescent lamp saves electric energy; in the same brightness situation, the necessary electric power of the electronic ballast is only 2/3 or so of the electrical power consumption of the electric inducting type ballast. The electronic ballast for the fluorescent lamp needs a few circuit elements, has low cost and easy generalization and application.
Description
(1) technical field
The utility model relates to the electrical lighting field, is specifically related to a kind of electronic ballast for fluoresent lamp.
(2) technical background
Existing multiple electronic ballast for fluoresent lamp, but the crest factor of product, harmonic content and three Key Performance Indicators of power factor still fail to reach simultaneously national GB/T15144-94 standard.The major defect of its existence is that power factor is lower, generally can only reach 0.5～0.6, influences the operate as normal of supply line.Easily turn black in the fluorescent tube two ends in addition, can reduce the brightness of illumination, also reduces the fluorescent tube life-span.Pliotron in its circuit is fragile, so the commercially available electric ballast life-span is lower, also has some to cause the luminance shortage of fluorescent lamp.Existing hundreds of of existing patent application of closing electric ballast all addresses the above problem attempting, but Shang Weijian not only economy but also more effective the design that addresses the above problem.
(3) utility model content
The purpose of this utility model is a kind of novel fluorescence lamp electronic ballast of design, and its power factor can reach more than 0.9, and not fragile.
The novel fluorescence lamp electronic ballast of the utility model design comprises bridge rectifier, filter circuit, 2 high power switch transistors, pulse transformer, choke and corresponding resistance, electric capacity and diodes that four diodes are formed.The pulse transformer primary coil is among the design
Circle, two secondary coil symmetries respectively are
Circle.Two secondary coils are connected with two pliotrons respectively through resistance, electric capacity, and through experiment repeatedly, the pulse transformer secondary coil number of turn is
During circle, pliotron is not fragile.Two pliotron emitters connecting resistance not among the design, behind bridge rectifier three diodes and two current follow-up circuits that electrochemical capacitor is formed, replace using a big electrochemical capacitor filtering in the general electric ballast, improved the power factor of this electric ballast.Ingenious access diode protection pliotron in the circuit has improved the reliability of circuit.
Advantage of the present utility model is: 1, the pliotron in the circuit is protected, and this electric ballast improved than the general electric ballast life-span, and is durable in use; 2, the power factor that improves supply line generally can reach 0.93 greater than 0.9; 3, save electric energy, under the same brightness situation, use the required electric weight of this electric ballast work only for using about 2/3 of inductance type ballast work institute power consumption; 4, the required element of this circuit of electronic ballast is few, and production cost is low, is easy to apply.
(4) description of drawings
Fig. 1 is this circuit of fluorescent lamp electronic ballast schematic diagram.
(5) embodiment
As shown in Figure 1, the novel fluorescence lamp electronic ballast of the utility model design comprises that four diode VD1, VD2, VD3, VD4 form bridge rectifier, filter circuit, 2 pliotron V1, V2, pulse transformer T, choke L, and corresponding resistance, electric capacity and diode.The pulse transformer primary coil is among the design
Circle, two secondary coil symmetries respectively are
Circle.Through experiment repeatedly, the embodiment of best results is that the pulse transformer primary coil is
Circle, two secondary coils respectively are
Circle.
Two pliotron emitters connecting resistance not among the design.General electric ballast all inserts resistance behind pliotron, to obtain feedback.Though improved the stable of circuit, this resistance increases the switching circuit loss.As shown in Figure 1, the emitter of pliotron V1 in this circuit of electronic ballast is connected with the collector electrode of pliotron V2, the emitter of V1 is connected with its base stage through diode VD9, base stage is connected with collector electrode through diode VD8, and its base stage is connected with the secondary coil of pulse transformer T with capacitor C 5 through current-limiting resistance R4; Equally, the emitter of V2 is connected with base stage through diode VD11, base stage is connected with collector electrode through diode VD10, its base stage is connected with another secondary coil of pulse transformer with capacitor C 6 through current-limiting resistance R5, and the emitter of V1 is connected with the collector electrode of V2 and is connected with the primary coil of pulse transformer T.The pulse transformer T primary coil other end is connected with choke L.Parallel resistance R2 between the emitter of pliotron V1 and the collector electrode, parallel resistance R3 between the base stage of pliotron V2 and the collector electrode.This circuit self-excitation produces concussion, and forms switching circuit, and because of pliotron emitter connecting resistance not, this switching circuit loss is minimized.Diode VD8, VD9, VD10, VD11 protection triode V1, V2 make triode not fragile.
Resistance R 2 is in parallel with capacitor C 4, and the acceleration switch action improves current waveform.This capacitor C 4 equals to connect the capacitor C 8 of two filaments.
Be three diode VD5, VD6, VD7 and two current follow-up circuits that electrochemical capacitor C1, C2 form behind the bridge rectifier, replace general electric ballast only to adopt a big electrochemical capacitor as filter circuit.After adopting current follow-up circuit filtering, current waveform on the power supply circuits and supply power voltage waveform are close, and power factor is brought up to more than 0.9 by 0.5～0.6.At current follow-up circuit two ends shunt capacitance C3, further strengthen High frequency filter, weaken interference.This capacitor C 3 equals filament one capacitor C that end connects 7.
Ac input end inserts R1, as the unusual overload protection of entire circuit.
Scope that parameter is got in this electric ballast is as follows: R2=R3=430～560 kilohm, R4=R5=4.3～5.6 ohm, C5=C6=4.7～22 microfarads/25 volt; C4=C8=4300～5600 picofarads/400 volt, C3=C7=0.047～0.1 microfarad/400 volt.
Claims (9)
1 one kinds of electronic ballast for fluoresent lamps comprise that four diode VD1, VD2, VD3, VD4 form bridge rectifier, filter circuit, 2 pliotron V1, V2, pulse transformer T, choke L, and corresponding resistance, electric capacity and diode; It is characterized by:
Above-mentioned pulse transformer primary coil is
Circle, two secondary coil symmetries respectively are
Circle.
2 electronic ballast for fluoresent lamps according to claim 1 is characterized by: above-mentioned pulse transformer primary coil is
Circle, two secondary coil symmetries respectively are
Circle.
3 electronic ballast for fluoresent lamps according to claim 1 and 2 is characterized by:
The emitter of pliotron V1 is connected with the collector electrode of pliotron V2, the emitter of V1 is connected with its base stage through diode VD9, base stage is connected with collector electrode through diode VD8, and its base stage is connected with the secondary coil of pulse transformer T with capacitor C 5 through current-limiting resistance R4; Equally, the emitter of V2 is connected with its base stage through diode VD11, base stage is connected with collector electrode through diode VD10, its base stage is connected with another secondary coil of pulse transformer with capacitor C 6 through current-limiting resistance R5, and the emitter of V1 is connected with the collector electrode of V2 and is connected with the primary coil of pulse transformer T; Parallel resistance R2 between the emitter of pliotron V1 and the collector electrode, parallel resistance R3 between the base stage of pliotron V2 and the collector electrode.
4 electronic ballast for fluoresent lamps according to claim 3 is characterized by:
Described resistance R 2 is in parallel with capacitor C 4.
5 electronic ballast for fluoresent lamps according to claim 1 is characterized by:
Behind the described bridge rectifier three diode VD5, VD6, VD7 and two current follow-up circuits that electrochemical capacitor C1, C2 form.
6 electronic ballast for fluoresent lamps according to claim 5 is characterized by:
Described current follow-up circuit two ends shunt capacitance C3.
7 electronic ballast for fluoresent lamps according to claim 3 is characterized by:
Scope that described component parameters is got is as follows: R2=R3=430～560 kilohm, R4=R5=4.3～5.6 ohm, C5=C6=10 microfarad/25 volt.
8 electronic ballast for fluoresent lamps according to claim 4 is characterized by:
Described capacitor C 4=C8=4300～5600 picofarads/400 volt.
9 electronic ballast for fluoresent lamps according to claim 6 is characterized by:
Described capacitor C 3=C7=0.047～0.1 microfarad/400 volt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420034023 CN2712044Y (en) | 2004-06-10 | 2004-06-10 | Electronic ballast for fluorescent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420034023 CN2712044Y (en) | 2004-06-10 | 2004-06-10 | Electronic ballast for fluorescent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2712044Y true CN2712044Y (en) | 2005-07-20 |
Family
ID=36193143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420034023 Expired - Fee Related CN2712044Y (en) | 2004-06-10 | 2004-06-10 | Electronic ballast for fluorescent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2712044Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102209424A (en) * | 2011-07-06 | 2011-10-05 | 陈钢 | High-reliability electronic ballast for fluorescent lamp |
| CN101754551B (en) * | 2010-02-04 | 2014-12-24 | 上海阿卡得电子有限公司 | Fluorescent lamp abnormal condition protection and sampling circuit |
-
2004
- 2004-06-10 CN CN 200420034023 patent/CN2712044Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101754551B (en) * | 2010-02-04 | 2014-12-24 | 上海阿卡得电子有限公司 | Fluorescent lamp abnormal condition protection and sampling circuit |
| CN102209424A (en) * | 2011-07-06 | 2011-10-05 | 陈钢 | High-reliability electronic ballast for fluorescent lamp |
| CN102209424B (en) * | 2011-07-06 | 2013-10-30 | 陈钢 | High-reliability electronic ballast for fluorescent lamp |
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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 |