CN2273479Y - Electronic ballast with ultra-high performance - Google Patents
Electronic ballast with ultra-high performance Download PDFInfo
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- CN2273479Y CN2273479Y CN 96237810 CN96237810U CN2273479Y CN 2273479 Y CN2273479 Y CN 2273479Y CN 96237810 CN96237810 CN 96237810 CN 96237810 U CN96237810 U CN 96237810U CN 2273479 Y CN2273479 Y CN 2273479Y
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Abstract
The utility model provides an electronic ballast with ultra-high performance, which comprises a filter circuit, a bridge type full-wave rectifying circuit and a high-frequency oscillating circuit. A one time follow current circuit is connected in parallel at the output end of the bridge type full-wave rectifying circuit. The utility model overcomes the defect that the electronic ballast required in the prior art has high power factor, low harmonic content and low wave crest coefficient and is unable to simultaneously satisfy national standard. The voltage of the whole loop of the utility model is low; the voltage resistant requirement to key elements is also reduced; the cost is made to be reduced; work efficiency is high; the stability is high.
Description
The utility model relates to a kind of electric ballast, particularly a kind of very-high performance electric ballast.
More and more be extensive use of owing to the obvious energy-saving effect of electric ballast by people; But mainly adopt the ordinary electronic ballast of filter circuit, rectification circuit, high-frequency oscillating circuits composition at present in the prior art, power factor, harmonic content, crest factor is neither can be up to state standards, in order to make its performance parameter satisfy national standard, its performance is modified gradually.
China Patent No. be 90103000 disclose a kind of " have an electronic ballast for fluoresent lamp of current follow-up circuit ", it is on ordinary electronic ballast basis, increased freewheeling circuit, make its performance be up to state standards in about the requirement of band H sign high-performance electronic ballast; But the freewheeling circuit of this ballast divides the secondary afterflow, source current is a staircase waveform, also do not reach sinusoidal wave requirement, the line power factor generally also is no more than 0.95, source current more than 3 times harmonic wave also do not reach in the national standard requirement about the very-high performance electric ballast of low harmonic content requirement, crest factor is also too high, can not satisfy request of national standard.
The purpose of this utility model is to improve the shortcoming of prior art and a kind of very-high performance electric ballast is provided, the requirement of low harmonic content during it can be up to state standards, and the power factor height, harmonic content is low, crest factor is low, can satisfy simultaneously.
The purpose of this utility model is achieved in that a kind of very-high performance electric ballast, comprises filter circuit, full-wave bridge rectifier circuit, high-frequency oscillating circuits, it is characterized in that the full-wave bridge rectifier circuit output and connects a freewheeling circuit.
A freewheeling circuit of the present utility model, be with after capacitor C 1, C2 serial connection back and diode D6, the electrochemical capacitor C3 series connection, successively be attempted by the full-wave bridge rectifier circuit output, the positive pole of diode D5 connects the tie point A of capacitor C 1, C2, negative pole connects the tie point B of diode D6, capacitor C 3, and fluorescent lamp work loop preferably is connected to the A point in the freewheeling circuit one time.
Freewheeling circuit of the utility model to source current an afterflow finish high efficiency, good stability; Fluorescent lamp work loop is connected to once the A point in the continuous circuit, and the voltage in whole loop is low, and the requirement of withstand voltage of key element is also reduced, and cost is reduced.
The utility model most preferred embodiment describes in detail in conjunction with the following drawings:
Fig. 1 is the very-high performance electronic ballast circuit schematic diagram of the utility model most preferred embodiment.
According to Fig. 1, inductance line chart B1 constitutes filter circuit, and power supply is carried out filtering; Diode D1-D4 constitutes full-wave bridge rectifier circuit, and its output one end is a positive source, and an end is a power cathode; After capacitor C 1, C2 series connection back and diode D6, the electrochemical capacitor C3 series connection, successively be attempted by the bridge rectifier output, the positive pole of diode D5 connects the tie point A of capacitor C 1, C2, and negative pole connects the tie point B of diode D6, capacitor C 3, constitutes one time continuous current circuit; Resistance R 1, just be connected to power supply after capacitor C 4 series connection, negative pole, triode BG1 collector electrode is connected to positive source, emitter is connected to triode BG2 collector electrode through resistance R 4, triode BG2 emitter is connected to power cathode through resistance R 5, triode BG1 base stage is connected to the end of magnetic ring coil B3-2 through resistance R 2, the other end is connected to the collector electrode of triode BG2, triode BG2 base stage is connected to the end of magnetic ring coil B3-3 through resistance R 3, the other end is connected to power cathode, resistance R 1 is connected to triode BG2 base stage with the tie point C of capacitor C 4 through diac D8, also be connected to triode BG2 collector electrode through diode D7, constitute high-frequency oscillating circuits, for fluorescent lamp work loop provides high frequency voltage; Triode BG2 collector electrode is connected to the end of inductance coil B2 through magnetic ring coil B3-1, the other end is connected to an end of capacitor C 6 through filament of fluorescent lamp, the other end of capacitor C 6 is connected to the A point in the freewheeling circuit through another filament of fluorescent lamp one time through electricity, constitutes fluorescent lamp work loop; Triode BG2 collector electrode also is connected to fluorescent lamp work loop through capacitor C 5, is used for stable working frequency.
Source current through bridge rectifier rectification output still is a pulsating voltage, when voltage rises, through capacitor C 1, the C2 dividing potential drop after diode D5 the electrochemical capacitor C3 in the freewheeling circuit is charged, when voltage reduces, diode D5 ends, the voltage that electrochemical capacitor C3 stores discharges to supply voltage by diode D6, an i.e. afterflow, it is more level and smooth to make high-frequency oscillating circuits obtain operating voltage, power factor height (〉=0.98), and adjust the high frequency voltage that high-frequency oscillating circuits produces, make it not influence power supply, harmonic content low (＜20%), crest factor also lower (＜1.7).
In the present embodiment, capacitor C 1=C2=10 μ F/400V, C3=10 μ F/250V, C3=0.047 μ F/100V, C5=0.0047 μ F/400V, C6=10PF/1000V; Resistance R 1=560K Ω, R2=R3=10 Ω, R4=R5=1 Ω; Diode D1-D7 adopts IN4007, and diac D8 is DB3, and inductance coil B1 is 5mH, and magnetic ring coil B3-1 and B3-2, B3-3 turn ratio are 3: 5: 5, and inductance coil B2 is 1.5mH, adopts conventional shell encapsulation, constitutes the very-high performance electric ballast.
Claims (4)
1. a very-high performance electric ballast comprises filter circuit, full-wave bridge rectifier circuit, high-frequency oscillating circuits, it is characterized in that at the full-wave bridge rectifier circuit output and connects a freewheeling circuit.
2. very-high performance electric ballast according to claim 1, after it is characterized in that a freewheeling circuit is by capacitor C 1, C2 series connection back and diode D6, capacitor C 3 series connection, successively be attempted by the full-wave bridge rectifier circuit output, the positive pole of diode D5 connects the tie point A of capacitor C 1, C2, and negative pole connects the tie point B of diode D6, electrochemical capacitor C3.
3. very-high performance electric ballast according to claim 1 and 2 is characterized in that fluorescent lamp work loop is connected to the A point of a freewheeling circuit.
4. very-high performance electric ballast according to claim 1 and 2 is characterized in that in freewheeling circuit, capacitor C 1=C2=10 μ F, and withstand voltage 400V, C3=10 μ F, withstand voltage 250V, diode D5, D6 adopt IN4007.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96237810 CN2273479Y (en) | 1996-11-22 | 1996-11-22 | Electronic ballast with ultra-high performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96237810 CN2273479Y (en) | 1996-11-22 | 1996-11-22 | Electronic ballast with ultra-high performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2273479Y true CN2273479Y (en) | 1998-01-28 |
Family
ID=33913290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96237810 Expired - Fee Related CN2273479Y (en) | 1996-11-22 | 1996-11-22 | Electronic ballast with ultra-high performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2273479Y (en) |
-
1996
- 1996-11-22 CN CN 96237810 patent/CN2273479Y/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 |