CN2569509Y - Electronic ballast - Google Patents
Electronic ballast Download PDFInfo
- Publication number
- CN2569509Y CN2569509Y CN 02272557 CN02272557U CN2569509Y CN 2569509 Y CN2569509 Y CN 2569509Y CN 02272557 CN02272557 CN 02272557 CN 02272557 U CN02272557 U CN 02272557U CN 2569509 Y CN2569509 Y CN 2569509Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- frequency feedback
- bridge
- high frequency
- bridge type
- 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 - Lifetime
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model relates to an electronic ballast, which comprises a rectification and filter circuit, a bridge type rectification circuit, a half-bridge inverter circuit, a voltage boosting circuit connected in series with the bridge type rectification circuit, and a high frequency feedback circuit connected in parallel with the bridge type rectification circuit, wherein, the voltage boosting circuit comprises a voltage boosting inductor L#-[3] and a diode D#-[5] connected in series with the bridge type rectification circuit; the high frequency feedback circuit comprises feedback capacitors C#-[6]and C#-[7] connected in series with the ground, diodes D#-[6] and D#-[7], and an electrolytic capacitor C#-[8]; a diode D#-[8] is connected in parallel with both ends of the C#-[7]. The utility model is added with a plurality of elements such as the voltage boosting circuit and the high frequency feedback circuit behind the bridge type rectification circuit, uses electrical inductance to boost voltage so as to maintain the stabilization of current, and uses high frequency feedback to cause a rectification bridge and the diodes to maintain a nearly complete conducting operating state; in this way, the electronic ballast completely meets or passes beyond the national standards at the parameter aspects of the power factor of lines, the electric current harmonic content of power supplies, the current wave crest coefficient of lamps, etc.
Description
Technical field
The utility model relates to a kind of electric ballast, is meant a kind of electronic ballast for fluoresent lamp that utilizes inductance boost and electric capacity high frequency feedback especially.
Background technology
Electronic ballast for fluoresent lamp is as a kind of small household electrical appliance commonly used, and its basic circuit mainly comprises EMC filtering, bridge rectifier, power factor correction, the higher-order of oscillation and control circuit.In GB/15143-94 and GB/T15144-94, its performance index there is extremely detailed requirement, wherein power supply Harmonics of Input content, line power factor are unusual important techniques indexs with king light electric current crest factor.Can be in the wave distortion that suppresses the electric ballast source current effectively, when realizing low harmonic distortion requirement and High Power Factor, reduce lamp current crest coefficient, the problem that desire solves when being technological development staff development high-performance, high-reliability electronic ballast always.For a long time, the technical staff is when realizing power factor correction, and the general method that generally adopts mainly contains two kinds: the one, adopt the active power filtering technology, and its properties of product are superior, reliable, but because its cost is too high, are difficult to be accepted by consumers in general; The 2nd, adopt current follow-up circuit, current follow-up circuit is comparatively economical, but it can only bring up to 0.94～0.95 with power factor, harmonic wave H level, lamp current crest coefficient is more than 1.9, fails to satisfy fully the requirement of GB.
Summary of the invention
The purpose of this utility model provides a kind of wave distortion that can effectively suppress source current, realize low harmonic distortion, reach High Power Factor, reduce the electric ballast of lamp current crest coefficient.
Designed a kind of electric ballast according to above-mentioned purpose, its circuit part comprises the current rectifying and wave filtering circuit that electrically connects with the city, the bridge rectifier that connects with current rectifying and wave filtering circuit and half-bridge inversion circuit, and it also comprises the booster circuit and the high-frequency feedback circuit in parallel with bridge rectifier of connecting with bridge rectifier.Described booster circuit comprises and bridge rectifier diode in series D
5, D
5Again with boost inductance L
3Series connection.Described bridge rectifier, booster circuit are in parallel with high-frequency feedback circuit, and one of interface is at L
3Output port A place, another interface is in the another port of bridge rectifier.High-frequency feedback circuit comprises the feedback capacity C of serial connection over the ground
6, C
7, C
6, C
7Connection mid point B connect with an end of filament in the fluorescent tube; A place and B place are connected to diode D respectively
6, D
7And with electrochemical capacitor C
8Connect, at C
7Two ends also are parallel with diode D
8
The utility model utilizes prior art, very few several elements of booster circuit and high-frequency feedback circuit behind bridge rectifier, have only been increased, just from causing low too small the starting with in basic reason rectifier bridge diode current flow angle of electric ballast power factor, by stablizing of inductance boost holding current, make the rectifier bridge diode remain on the almost operating state of full conducting by high frequency feedback, realized low cost, high-performance, the electric ballast circuit of power factor correction of high reliability, make electric ballast in the circuit power factor, parameter aspects such as source current harmonic content and lamp current crest coefficient satisfy fully or have surpassed national standard, are applicable to fluorescent lamp and neon-light electronic ballast.
Description of drawings
Accompanying drawing is a circuit theory schematic diagram of the present utility model.
Specific embodiments
From accompanying drawing as seen, the utility model is linked to each other with civil power by current rectifying and wave filtering circuit, the direct diode rectification bridge-type of rectification circuit circuit.One port of export of this rectification circuit with by mutual diode in series D
5, boost inductance L
3The booster circuit series connection of forming, the outlet A place of booster circuit is connected in series feedback capacity C over the ground
6, C
7, C
6, C
7Connection mid point B place connect with the filament of fluorescent tube, simultaneously A place and B place meet D respectively
6, D
7After meet electrochemical capacitor C again
8An end, C
8The other end and C
7An end insert another outlet of rectifier bridge together, at C
7Two ends also be parallel with diode D
8
From circuit as seen, diode D
5Can further isolate fluorescent tube high frequency feedback electric current, improve power factor, reduce power supply input current higher harmonic content, current harmonics is mainly concentrated on three times.Inductance L
3Main purpose be the elevator system direct voltage, guarantee electric current steadily, reduce lamp current crest coefficient.By capacitor C
6, C
7And diode D
6～D
8The high frequency feedback system that forms mainly is by the feedback stack of high frequency and the effect of boost inductance, and the angle of flow of the diode of rectifier bridge is enlarged, output current follow reposefully voltage fluctuation and near sinusoidal wave.By the utilization of said elements, solved the basic reason that causes the system power factor low, suppressed the wave distortion of electric ballast source current effectively, realized low harmonic distortion and High Power Factor, reduced the crest system of lamp current.
Claims (4)
1, a kind of electric ballast, its circuit part comprise the current rectifying and wave filtering circuit that electrically connects with the city, the bridge rectifier that connects with current rectifying and wave filtering circuit and half-bridge inversion circuit, it is characterized in that
Also comprise the booster circuit and the high-frequency feedback circuit in parallel of connecting with bridge rectifier with bridge rectifier.
2, ballast according to claim 1 is characterized in that described booster circuit comprises and bridge rectifier diode in series D
5, D
5Again with boost inductance L
3Series connection.
3, ballast according to claim 1 and 2 is characterized in that described bridge rectifier, booster circuit are in parallel with high-frequency feedback circuit, and one of interface is at L
3Output port A place.
4, ballast according to claim 3 is characterized in that high-frequency feedback circuit comprises the feedback capacity C of serial connection over the ground
6, C
7, C
6, C
7Connection mid point B connect with an end of filament in the fluorescent tube; A place and B place are connected to earth polar pipe D respectively
6, D
7And with electrochemical capacitor C
8Connect, at C
7Two ends also are parallel with diode D
8
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02272557 CN2569509Y (en) | 2002-08-14 | 2002-08-14 | Electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02272557 CN2569509Y (en) | 2002-08-14 | 2002-08-14 | Electronic ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2569509Y true CN2569509Y (en) | 2003-08-27 |
Family
ID=33737231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02272557 Expired - Lifetime CN2569509Y (en) | 2002-08-14 | 2002-08-14 | Electronic ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2569509Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1753594B (en) * | 2005-10-27 | 2010-12-15 | 东阳得邦照明有限公司 | Electron ballast passive power factor correcting circuit |
-
2002
- 2002-08-14 CN CN 02272557 patent/CN2569509Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1753594B (en) * | 2005-10-27 | 2010-12-15 | 东阳得邦照明有限公司 | Electron ballast passive power factor correcting circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TCL CORPORATION Free format text: FORMER OWNER: HUIZHOU TCL LIGHTING ELECTRIC APPLIANCE CO., LTD. Effective date: 20080905 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080905 Address after: Technical center, 8 floor, TCL Arts crafts emporium, No. 6 Goose Road South, Guangdong, Huizhou, China: 516001 Patentee after: TCL Group Co., Ltd. Address before: Huatong Industrial Park, 26 No. three Guangdong road Zhongkai road of city of Huizhou province zip code: 516006 Patentee before: Huizhou TCL Lighting Appliance Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120814 Granted publication date: 20030827 |