CN2617119Y - High power factor high-performance electronic ballast - Google Patents
High power factor high-performance electronic ballast Download PDFInfo
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- CN2617119Y CN2617119Y CN 03216800 CN03216800U CN2617119Y CN 2617119 Y CN2617119 Y CN 2617119Y CN 03216800 CN03216800 CN 03216800 CN 03216800 U CN03216800 U CN 03216800U CN 2617119 Y CN2617119 Y CN 2617119Y
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- power factor
- performance electronic
- high power
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Abstract
The utility model discloses an electronic ballast with high power factor, which comprises an interference filter circuit (1), a freewheel flow circuit (2), a rectifier circuit (3), a passive filter circuit (4), a switch conversion and output circuit (5), a high frequency feedback circuit (6) and an abnormal protection circuit (7). Because the utility model adopts the freewheel flow circuit, the passive filter circuit, and the high frequency feedback circuit, the input power factor is over 0.97, the total harmonic amount of the input current is lower than 10%, and the wave crest coefficient of the lamp is lower than 1.7; the adoption of the abnormal protection circuit enables the electronic ballast to protect the ballast reliably and safely when abnormality occurs to the electronic ballast.
Description
Affiliated technical field
The utility model belongs to electric ballast, particularly relates to a kind of High Power Factor high-performance electronic ballast.
Background technology
Electric ballast is because energy-conservation, easy to use, high efficiency, cost are low, and is widely used in the electricity aspect.At present, common electric ballast adopts simple ballast filtering and LC high-frequency oscillating circuits mostly, there is following shortcoming in this electric ballast: 1) power factor is lower, between 0.5-0.9, Harmonics of Input content is big, mostly more than 30%, have in addition up to 130%, this will cause very big harm to electrical network; 2) lamp current crest coefficient is more than 1.7, have in addition up to 2.1, this will shorten lamp tube service life; 3) do not have interfered circuit, can't reach both at home and abroad electromagnetic compatibility requirements, this will cause very big harm to electrical network; 4) many abnormity protection circuits that do not adopt cause the electric ballast can't operate as normal.At above-mentioned shortcoming, people have proposed a solution, and the patent No. of announcing as Chinese patent database is 99218394.4, and patent name is the fluorescent tube electric ballast.A kind of electronic ballast for fluorescent lamps, be characterized in mainly comprising the interference filter circuit 1 of the pi type filter of forming by L1 and capacitor C 1, C2, mainly by diode D5, D6, D7 and capacitor C 17, C18 forms by flowing filter circuit 3 and mainly by diode D14, D15, capacitor C 4, being used of the high-frequency circuit of the two-way that C5 forms.But above-mentioned patent also exists some shortcomings, 1) adopted the high-frequency circuit of two-way, increase cost; 2) adopt abnormity protection circuit, but be easy to generate misoperation protection, caused the defencive function forfeiture, caused the electric ballast can't operate as normal.
Summary of the invention
The purpose of this utility model is at the shortcoming of above-mentioned electric ballast; a kind of power factor height is provided, harmonic content is low, the electric current crest factor is low, and has a kind of High Power Factor high-performance electronic ballast of perfect electromagnetic compatibility, safety, reliably protecting function.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of High Power Factor high-performance electronic ballast mainly comprises interference filter circuit (1); Freewheeling circuit (2); Rectification circuit (3); By stream filter circuit (4); Switch transition and output circuit (5); Supply voltage is behind interference filter circuit (1) filtering high-frequency signal; Enter rectification circuit (3) by freewheeling circuit (2) and carry out rectification, continuous warp obtains the DC operation level for switch transition and output circuit (5) work by the filtering of stream filter circuit (4), also comprises
Single channel high-frequency feedback circuit (6) feeds back to the high-frequency signal of switch transition and output circuit (5) output by stream filter circuit (4);
Abnormity protection circuit (7), abnormity protection circuit (7) are connected in switch transition and output circuit (5).
Freewheeling circuit described in the utility model (2) is connected in before or after the interference filter circuit (1), or is connected in series in anode or negative terminal behind the rectification circuit (3).
High-frequency feedback circuit described in the utility model (6) is composed in parallel by diode D5 and capacitor C 4.
Rectification circuit described in the utility model (3), mainly bridge circuit of being made up of diode D1, D2, D3, D4 and the capacitor C 3 in parallel with bridge circuit are formed; Or bridge circuit and the two or more series-parallel electric capacity mainly be made up of diode D1, D2, D3, D4 compose in parallel.
Abnormity protection circuit described in the utility model (7) comprises resistance R 7, R8, R9, R10; Diode D7, D13, D14; Trigger tube DB32; Triode V3; Controllable silicon SCR; Electric capacity E3, C9 and transformer L3, when the circuit abnormal state, transformer L3's is secondary with induced electromotive force, behind D7, R10, E3, R9 rectifying and wave-filtering, the level that reaches DB32 is with the DB32 triggering and conducting, and the level one tunnel after the conducting is through diode D14, make triode V3 conducting, thereby the base potential of the triode V2 of switch transition and output circuit (5) is reduced, V2 can't be worked, the circuit failure of oscillations; D13 is passed through on another road, to SCR control utmost point signal, make the SCR conducting, resistance R 1, R2 through switch transition and output circuit (5) bleeds off to the charging of capacitor C 8 with the power supply DC level, make the level on the C8 can't make trigger tube DB31 triggering and conducting, thereby V2 can't be worked, D13, D14 can stop reverse current, avoid the misoperation of SCR and V3, cause the circuit failure of oscillation.
High-frequency feedback circuit described in the utility model (6) links to each other with the positive source of rectification circuit (3) by the positive pole of diode D5; Or be serially connected with rectification circuit (3) and capacitor C 3 negative terminals and by between the stream filter circuit (4), and promptly the negative pole of diode D5 links to each other also continuously in an end of capacitor C 5 with the negative terminal of rectification circuit, and the other end of capacitor C 5 links to each other with load.
The diode D13 position of abnormity protection circuit described in the utility model (7) and resistance R 7 exchanges.
The position of the diode D14 of abnormity protection circuit described in the utility model (7) and resistance R 8 exchanges.
The diode D14 of abnormity protection circuit described in the utility model (7) goes here and there in the emitter of triode V3 and the position between the ground connection.
In the abnormity protection circuit described in the utility model (7), also be voltage sampling through the abnormal signal of diode D7, with the secondary cancellation of transformer L3, the positive pole of D7 directly is connected to the elementary arbitrary end of L3 or directly is connected to arbitrary end of load LAMP.
A kind of High Power Factor high-performance electronic ballast of the present utility model, owing to adopted above-mentioned freewheeling circuit, by the stream filter circuit and with being used of high-frequency feedback circuit, the input power factor of this electric ballast is reached more than 0.97, the total harmonic content of input current is lower than 10%, and lamp current crest coefficient is below 1.7; Adopted abnormity protection circuit, made this electric ballast when generation is unusual, can protect ballast reliably, safely; Capacitor C 1, C2 and inductance L 1 are formed π type interference filter circuit (1), High-frequency Interference in the electrical network is suppressed at outside the electric ballast, the high-frequency signal that also electric ballast is produced disturbs and is suppressed in this electric ballast simultaneously, thereby has perfect electromagnetic compatibility function; Together constituted DC power supply circuit by stream filter circuit (4) and rectification circuit (3),, therefore can tentatively improve the power factor of circuit, lowered current harmonic content because filter circuit has certain phase modulation effect; High-frequency feedback circuit (6), with the high-frequency signal feedback of switch transition and output circuit (5) output and by stream filter circuit (4), high-frequency feedback circuit and freewheeling circuit, being used by the stream filter circuit, improved the power factor of circuit, simultaneously the output lamp current is compensated, thus the crest factor of reduction electric current.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with Fig. 1, Fig. 2 a kind of High Power Factor high-performance electronic ballast of the utility model is described further.A kind of High Power Factor high-performance electronic ballast mainly comprises interference filter circuit (1), freewheeling circuit (2), rectification circuit (3), pursues stream filter circuit (4), switch transition and output circuit (5), high-frequency feedback circuit (6), abnormity protection circuit (7).
Interference filter circuit (1) is the π type interference filter circuit of being made up of capacitor C 1, C2 and inductance L 1.At the preceding protective tube Fu that also is connected with of interference filter circuit (1).Supply voltage behind interference filter circuit (1) filtering high-frequency signal.
Freewheeling circuit (2) mainly is made up of inductance L 2.Behind connection and the interference filter circuit (1).Freewheeling circuit (2) plays the afterflow effect, can get certain effect to the power factor and the reduction output current crest factor that improve circuit.
Rectification circuit (3) mainly is made up of diode D1, D2, D3, D4 and capacitor C 3.Rectification circuit (3) is connected with freewheeling circuit (2).Voltage by freewheeling circuit (2) is carried out rectification.
By stream filter circuit (4), mainly form by diode D8, D9, D10 and electric capacity E1, E2.Be connected in rectification circuit (3) by stream filter circuit (4).By stream filter circuit (4) voltage after the rectification is carried out filtering, obtain DC operation level for switch transition and output circuit (5) work.
Switch transition and output circuit (5) comprise diode D6, D11, D12, triode V1, V2, trigger tube DB31, capacitor C 5, C6, C7, C8, resistance R 1, R2, R3, R4, R5, R6, R7.Switch transition and output circuit (5) drive load LAMP work.Switch transition and output circuit (5) are connected in by stream filter circuit (4).
Single channel high-frequency feedback circuit (6) is mainly composed in parallel by diode D5 and capacitor C 4.High-frequency feedback circuit (6) links to each other with the positive source of rectification circuit (3) by the positive pole of diode D5.High-frequency feedback circuit (6) is with the high-frequency signal feedback of switch transition and output circuit output and by the stream filter circuit.
Abnormity protection circuit (7) comprises resistance R 7, R8, R9, R10, diode D7, D13, D14, trigger tube DB32, triode V3, controllable silicon SCR, electric capacity E3, C8, C9 and transformer L3.Abnormity protection circuit (7) is connected switch transition and output circuit (5).
When the circuit abnormal state, such as fluorescent tube deexcitation or the like, secondary with induced electromotive force at transformer L3 is behind D7, R10, E3, R9 rectifying and wave-filtering, when level reaches DB32, with the DB32 triggering and conducting, one the tunnel through diode D14, makes triode V3 conducting, thereby the base potential of triode V2 is reduced, V2 can't be worked, the circuit failure of oscillations; Another road to SCR control utmost point signal, makes the SCR conducting by D13, and the power supply DC level is bled off to the charging of capacitor C 8 through resistance R 1, R2, makes V2 conducting starting of oscillation work once more with the level of avoiding this C8 through trigger tube DB31.D13 in this circuit, D14 can stop reverse current, avoid the misoperation of SCR and V3, cause the circuit failure of oscillation, do not work.
Claims (10)
1, a kind of High Power Factor high-performance electronic ballast, mainly comprise interference filter circuit (1), freewheeling circuit (2), rectification circuit (3), by stream filter circuit (4), switch transition and output circuit (5), supply voltage is behind interference filter circuit (1) filtering high-frequency signal, enter rectification circuit (3) by freewheeling circuit (2) and carry out rectification, continuous through pursuing the filtering of stream filter circuit (4), obtain DC operation level for switch transition and output circuit (5) work, it is characterized in that: also comprise single channel high-frequency feedback circuit (6), the high-frequency signal of switch transition and output circuit (5) output is fed back to by stream filter circuit (4); Abnormity protection circuit (7), abnormity protection circuit (7) are connected in switch transition and output circuit (5).
2, a kind of High Power Factor high-performance electronic ballast according to claim 1, it is characterized in that: described freewheeling circuit (2) is connected in before or after the interference filter circuit (1), or is connected in series in anode or negative terminal behind the rectification circuit (3).
3, a kind of High Power Factor high-performance electronic ballast according to claim 1 is characterized in that: described high-frequency feedback circuit (6) is composed in parallel by diode D5 and capacitor C 4.
4, a kind of High Power Factor high-performance electronic ballast according to claim 1 is characterized in that: described rectification circuit (3), and mainly bridge circuit of being made up of diode D1, D2, D3, D4 and the capacitor C 3 in parallel with bridge circuit are formed; Or bridge circuit and the two or more series-parallel electric capacity mainly be made up of diode D1, D2, D3, D4 compose in parallel.
5, a kind of High Power Factor high-performance electronic ballast according to claim 1, it is characterized in that: described abnormity protection circuit (7) comprises resistance R 7, R8, R9, R10; Diode D7, D13, D14; Trigger tube DB32; Triode V3; Controllable silicon SCR; Electric capacity E3, C9 and transformer L3, when the circuit abnormal state, transformer L3's is secondary with induced electromotive force, behind D7, R10, E3, R9 rectifying and wave-filtering, the level that reaches DB32 is with the DB32 triggering and conducting, and the level one tunnel after the conducting is through diode D14, make triode V3 conducting, thereby the base potential of the triode V2 of switch transition and output circuit (5) is reduced, V2 can't be worked, the circuit failure of oscillations; Another road to SCR control utmost point signal, makes the SCR conducting by D13, resistance R 1, R2 through switch transition and output circuit (5) bleeds off to the charging of capacitor C 8 with the power supply DC level, D13, D14 can stop reverse current, avoid the misoperation of SCR and V3, cause the circuit failure of oscillation.
6, according to claim 1,3 described a kind of High Power Factor high-performance electronic ballasts, it is characterized in that: described high-frequency feedback circuit (6) links to each other with the positive source of rectification circuit (3) by the positive pole of diode D5; Or be serially connected with rectification circuit (3) and capacitor C 3 negative terminals and by between the stream filter circuit (4), and promptly the negative pole of diode D5 links to each other also continuously in an end of capacitor C 5 with the negative terminal of rectification circuit, and the other end of capacitor C 5 links to each other with load.
7, according to claim 1,5 described a kind of High Power Factor high-performance electronic ballasts, it is characterized in that: the diode D13 position of described abnormity protection circuit (7) and resistance R 7 exchanges.
8, according to claim 1,5 described a kind of High Power Factor high-performance electronic ballasts, it is characterized in that: the position of the diode D14 of described abnormity protection circuit (7) and resistance R 8 exchanges.
9, according to claim 1,5 described a kind of High Power Factor high-performance electronic ballasts, it is characterized in that: the diode D14 of described abnormity protection circuit (7) goes here and there in the emitter of triode V3 and the position between the ground connection.
10, according to claim 1,5 described a kind of High Power Factor high-performance electronic ballasts; it is characterized in that: in the described abnormity protection circuit (7); abnormal signal through diode D7 also is a voltage sampling; with the secondary cancellation of transformer L3, the positive pole of D7 directly is connected to the elementary arbitrary end of L3 or directly is connected to arbitrary end of load LAMP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03216800 CN2617119Y (en) | 2003-04-28 | 2003-04-28 | High power factor high-performance electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03216800 CN2617119Y (en) | 2003-04-28 | 2003-04-28 | High power factor high-performance electronic ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2617119Y true CN2617119Y (en) | 2004-05-19 |
Family
ID=34243187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03216800 Expired - Fee Related CN2617119Y (en) | 2003-04-28 | 2003-04-28 | High power factor high-performance electronic ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2617119Y (en) |
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2003
- 2003-04-28 CN CN 03216800 patent/CN2617119Y/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 | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Designer after: Guo Shuifu Designer after: Li Zhiguo Designer after: Xu Wenping Designer before: Guo Yongfu Designer before: Li Zhiguo Designer before: Xu Wenping |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: DESIGNER; FROM: GUO YONGFU LI ZHIGUO XU WENPING TO: GUO SHUIFU LI ZHIGUO XU WENPING |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040519 Termination date: 20120428 |