CN2316797Y - High-power factor durable fluorescent lamp electronic ballast - Google Patents
High-power factor durable fluorescent lamp electronic ballast Download PDFInfo
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- CN2316797Y CN2316797Y CN 97230611 CN97230611U CN2316797Y CN 2316797 Y CN2316797 Y CN 2316797Y CN 97230611 CN97230611 CN 97230611 CN 97230611 U CN97230611 U CN 97230611U CN 2316797 Y CN2316797 Y CN 2316797Y
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- circuit
- power factor
- fluorescent lamp
- electronic ballast
- ballast
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Abstract
The utility model relates to a durable fluorescent lamp electronic ballast with high-power factor, which mainly comprises a rectification circuit, an inverter circuit and a resonant circuit. The electronic ballast is characterized in that a unidirectional voltage feedback circuit is connected between any one pin of a fluorescent lamp and a filter capacitor C1. The electronic ballast has the advantages of low harmonic quantity (THD is not larger than 20%), high power factor (the power factor lambda of the electronic ballast is larger than or equal to 0.95), preheating startup function, long service life of the ballast and the fluorescent lamp and wide application scope. The utility model effectively overcomes the shortages of the prior art, and is a very ideal electronic ballast for fluorescent lamps.
Description
The utility model relates to a kind of electric ballast that is used for fluorescent lamp, specifically refers to a kind of durable fluorescent lamp electric ballast of High Power Factor.
Electronic ballast for fluoresent lamp has been developed rapidly because of its more common inductance type ballast has little, in light weight, the no stroboscopic of volume, no hum and saves advantages such as material, economize on electricity since coming out.But existing fluorescent lamp ballast still exists well price height then of performance, though (as more external product power factor height, the life-span is long, security performance good, but its price is often in tens of units to hundreds of units, make domestic vast consumer be difficult to accept), though perhaps price is relatively low but its performance is then often relatively poor, can't satisfy the needs in market.Exist following deficiency as present homemade electronic ballast for fluoresent lamp:
1, harmonic content severe overweight does not meet green illumination electrical equipment about electrical network is not polluted the condition that is possessed;
2, system power factor low (often being lower than 0.6), the power utilization rate is low excessively, has deviated from the principle of green illumination electrical equipment about electricity saving and energy saving;
3, existing electric ballast belongs to quick cold start-up type mostly, the function that without preheating starts, the serious blackout of having aggravated lamp tube end, the useful life of having reduced fluorescent tube;
4, lamp tube current crest factor severe overweight has consequently aggravated the filament cathode damage, causes lamp tube service life to shorten.
The purpose of this utility model just is to provide a kind of durable fluorescent lamp electric ballast of High Power Factor, to draw feedback voltage by its any pin by unique circuit of feedback element to the filter capacitor charging by fluorescent tube, when keeping the various advantages of electric ballast effectively, also have the advantage that harmonic content is low, power factor is high, have pipeline start up by preheating function and ballast and fluorescent tube long service life, overcome the deficiencies in the prior art effectively.
The purpose of this utility model realizes in the following manner: a kind of durable fluorescent lamp electric ballast of High Power Factor, consist predominantly of rectification circuit, inverter circuit and resonant circuit, it is characterized in that behind rectification circuit, being parallel with the passive filter circuit of forming by diode D7 and capacitor C 1, between any pin of fluorescent tube and C1 and D7, be connected with unidirectional voltage feedback circuit.
Adopt the durable fluorescent lamp electric ballast of a kind of High Power Factor of the present utility model, owing to adopted by any pin of fluorescent tube and drawn feedback voltage by unique circuit of feedback element to the filter capacitor charging, when keeping the various advantages of electric ballast effectively, also has harmonic content low (THD ≯ 20%), power factor height (its power factor 〉=0.95), advantage with pipeline start up by preheating function and ballast and fluorescent tube long service life, the deficiencies in the prior art have been overcome effectively, be applicable to the double-U-shaped or 3U type of 5～13W, several electronic fluorescent lamps such as the two D types of 16～28W and 5～13WH type are a kind of very desirable electronic ballast for fluoresent lamps.
Description of drawings:
Fig. 1 is an embodiment circuit block diagram of the present utility model;
Fig. 2 is an embodiment circuit diagram of the present utility model;
Fig. 3 is the current waveform figure of foregoing circuit.
Below in conjunction with accompanying drawing the utility model is further described.
The durable fluorescent lamp electric ballast of High Power Factor of the present utility model, consist predominantly of rectification circuit (1), inverter circuit (3) and resonant circuit (5), behind rectification circuit, be parallel with the passive filter circuit of forming by diode D7 and capacitor C 1 (2), between any pin of fluorescent tube (6) and filter capacitor C1 and diode D7, be connected with unidirectional voltage feedback circuit (4).In foregoing circuit, rectification circuit (1) adopts conventional bridge rectifier, inverter circuit (3) is by triode T1, T2 and relevant electric elements are formed, resonant circuit (5) is by L2, L3 and relevant electric elements are formed, the feedback voltage of being drawn by the arbitrary end pin of fluorescent tube (6) passes through feedback element resistance R 1, diode D6 charges to C1, keep the electric charge on the C1, when instantaneous line voltage is lower than voltage on the C1, then directly directly power by D7 to the inverter power pipe by C1, and when the last voltage of C1 is lower than line voltage, D7 is in off-state, and is directly charged by feedback circuit.Because the existence of diode D7, when making ballast work the Harmonic Interference of electrical network is reduced to minimumly, improved its power factor effectively simultaneously, reached the purpose of this utility model.
The passive filtering efficient of this circuit is very high, the diode current flow angle of bridge rectifier reaches 120 °, THD≤20%, power factor λ 〉=0.95, and lamp current crest also can be significantly improved (as Fig. 3), and be connected to anti-interference inductance L 1 in the mains electricity input end, disturb very little to utility grid.
The higher-order of oscillation of this circuit inverter circuit is not to go triggering to cause vibration by the common circuits for triggering of being made up of diac etc., bias current is provided for power tube T2 but form biasing circuit by elements such as R2, R4, make the conducting of T2 elder generation, the back makes the inverter operate as normal by the L2 feedback.Because this circuit adopted the PTC thermistor that Filament of fluorescent lamp is carried out preheating, warm-up time is greater than 1 second (1S), thereby prolonged the useful life of fluorescent tube greatly.
Claims (2)
1, a kind of durable fluorescent lamp electric ballast of High Power Factor, consist predominantly of rectification circuit (1), inverter circuit (3) and resonant circuit (5), it is characterized in that behind rectification circuit (1), being parallel with the passive filter circuit of forming by diode D7 and capacitor C 1 (2), between any pin of fluorescent tube (6) and filter capacitor C1 and diode D7, be connected with unidirectional voltage feedback circuit (4).
2, the durable fluorescent lamp electric ballast of a kind of High Power Factor according to claim 1, it is characterized in that rectification circuit (1) adopts conventional bridge rectifier, inverter circuit (3) is made up of triode T1, T2 and relevant electric elements, resonant circuit (5) is made up of L2, L3 and relevant electric elements, the feedback voltage of being drawn by any end pin of fluorescent tube (6) charges to C1 by feedback element resistance R 1, diode D6, when the last voltage of C1 was lower than line voltage, D7 was in off-state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97230611 CN2316797Y (en) | 1997-12-12 | 1997-12-12 | High-power factor durable fluorescent lamp electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97230611 CN2316797Y (en) | 1997-12-12 | 1997-12-12 | High-power factor durable fluorescent lamp electronic ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2316797Y true CN2316797Y (en) | 1999-04-28 |
Family
ID=33943069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97230611 Expired - Fee Related CN2316797Y (en) | 1997-12-12 | 1997-12-12 | High-power factor durable fluorescent lamp electronic ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2316797Y (en) |
-
1997
- 1997-12-12 CN CN 97230611 patent/CN2316797Y/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 | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE ADDRESS; FROM: NO.47, CHAOYANG ROAD, XIANGZHOU, ZHUHAI, GUANGDONG PROVINCE, GANGWU CO., LTD. TO: NO. 13, DONGHUXINXISAN LANE, JIAZI TOWN, LUFENG CITY, GUANGDONG PROVINCE, 516538 |
|
| CP03 | Change of name, title or address |
Address after: Lufeng City, East Lake Guangdong Jiazi 516538 new West No. 13 Lane three Patentee after: Zhang Jianhua Patentee after: Chen Jinghuan Patentee after: Xie Rongheng Address before: No. 47, Chaoyang Road, Zhuhai, Guangdong, Xiangzhou, Port Liability Company Patentee before: Zhang Jianhua Patentee before: Chen Jinghuan Patentee before: Xie Rongheng |
|
| 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 |