CN2678308Y - Electronic ballast - Google Patents
Electronic ballast Download PDFInfo
- Publication number
- CN2678308Y CN2678308Y CN 200420008072 CN200420008072U CN2678308Y CN 2678308 Y CN2678308 Y CN 2678308Y CN 200420008072 CN200420008072 CN 200420008072 CN 200420008072 U CN200420008072 U CN 200420008072U CN 2678308 Y CN2678308 Y CN 2678308Y
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- circuit
- utility
- current
- model
- switching
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Abstract
The utility model discloses an electronic ballast, which is mainly composed of an antijamming circuit, a rectifying filter circuit, a high-frequency oscillation switching circuit and an output load resonance circuit. The high-frequency oscillation switching circuit comprises two or more than two switching tubes connected in parallel. In the high-frequency oscillation switching circuit, the utility model adopts a plurality of switching tubes used in parallel, and causes that the current of the switching tubes is more times than the current of a high-frequency oscillation switching circuit only using a switching tube. The utility model adopts two transistors connected in parallel, and allows that the current of the two transistors is twice than the current of a circuit with a single transistor. Because power is in direct proportion relation to the square of the current, the power most admitted by the utility model is four times than the circuit with a single transistor, in this way, the utility model greatly improves the efficiency of the circuit, improves the reliability and the service life of the electronic ballast, and decreases the electric power consumption and the cost of the electronic ballast.
Description
Technical field
The utility model relates to the electric ballast of a kind of electric ballast, particularly fluorescent lamp and electricity-saving lamp adapted.
Background technology
The present electric ballast that uses, mostly adopt half-bridge circuit or push-pull circuit, two switching tubes take turns switch, produce high-frequency alternating current, light fluorescent tube, but its switching tube operating efficiency is lower, the electric ballast of especially big power output, ballast easily generates heat, reliability is low, quality is unstable, the reliably working life-span is low, and power consumption is higher, cost is high.
The utility model content
The purpose of this utility model is to provide that a kind of operating efficiency is higher, more economize on electricity, electric ballast that production cost is lower.
For achieving the above object, technical solution of the present utility model is:
After adopting such scheme, because a kind of electric ballast of the utility model mainly is made up of anti-jamming circuit, current rectifying and wave filtering circuit, higher-order of oscillation switching circuit and output load resonant circuit.Comprise switching tube in parallel more than two or two in the described higher-order of oscillation switching circuit.
Described switching tube is field effect transistor or triode.
In the prior art, think that increasing triode in parallel has just increased unbalanced possibility, can cause punch-through, but the utility model is in higher-order of oscillation switching circuit, overcome the prejudice in the circuit design, adopted the use in parallel of a plurality of switching tubes, the higher-order of oscillation switching circuit that its electric current is multiple times than only use a switching tube, two triode parallel connections have been used, it allows electric current to be twice in single triode, because power and electric current is square proportional, so its maximum allowable power is four times in the circuit of single triode, like this, improved circuit efficiency greatly, improve the reliability of ballast and the useful life of ballast, reduced the power consumption of ballast and the cost of ballast, can increase the brightness of 50-100 lumen than ordinary electronic ballast.
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model.
Embodiment
As shown in Figure 1, the utility model electric ballast is made up of anti-jamming circuit 1, current rectifying and wave filtering circuit 2, higher-order of oscillation switching circuit 3 and output load resonant circuit 4.
Described anti-jamming circuit 1 is made up of inductance T1 and capacitor C 1.Described current rectifying and wave filtering circuit 2 is made up of bridge rectifier and elements such as capacitor C 2-C3, diode D5-D7 that diode D1-D4 constitutes.Described higher-order of oscillation switching circuit 3 is made up of elements such as resistance R 1-R4, diode D8-D12, diac D13, capacitor C 4-C5, triode Q1-Q4, wherein triode Q1 is in parallel with Q2, Q3 is in parallel with Q4, and the also available field effect transistor of triode Q1-Q4 is replaced in the present embodiment; Output load resonant circuit 4 is made up of inductance T2, electronics R5, capacitor C 6-C7 and fluorescent lamp 41 etc.
During the work of the utility model electric ballast, AC supply voltage is through diode D1-D4 rectification, diode D5-D7 and capacitor C 2-C3 filtering, the direct voltage of output charges to capacitor C 4 through R1 again, when the voltage of capacitor C 4 reaches the puncture voltage of diac D13 (32V), one narrow current impulse is added to triode Q3, the base stage of Q4, triode Q3, the Q4 conducting, direct voltage is through capacitor C 6 blocking capacitors, fluorescent lamp 41 filaments, capacitor C 7, inductance T2, L2, triode Q3, Q4, transformer T3 constitutes the loop, because the positive feedback effect of inductance T3, triode Q3, Q4 and triode Q1, Q2 takes turns conducting, produce HF switch voltage, inductance T2 feeds, capacitor C 7 series resonant circuits, form the oscillating voltage of near sinusoidal ripple, when capacitor C 7 two ends crest voltages during greater than the puncture voltage of fluorescent lamp 41, fluorescent lamp 41 starts and ignites.After fluorescent lamp 41 was lighted, the voltage at fluorescent lamp 41 two ends was reduced to its tube voltage drop.Inductance T2 mainly plays metering function, regulates the inductance value of controllable impedance T2, can change power output.Behind the circuit start, capacitor C 4 is through diode D8, triode Q3, Q4 discharge, and diac D13 no longer includes trigger voltage.
Present embodiment is the electric ballast of the big four U lamp adapteds of 65W, and the parameter of each components and parts is in the circuit: select R1, R5=510K Ω 1/2W; R3, R4=1 Ω 1/2W; R5, R6=10 Ω 1/2W; R7 is thermistor PTC; D-D12=IN4007; D13=DB3; C1=100n/630V; C2, C3=33uF/250V; C4=47n/100V; C5=2n2/630V; C6=220n/250V; C7=12n/1200V; Q1-Q4=13003; T1 is an EE13 type inductance, and inductance value is 3.5mH; T2 is an EE28 type inductance, and inductance value is 1.5mH; T3 is R5K, Φ 10X6X5mm magnetic ring transformer, and its turn ratio is: L1: L2: L3=3: 2: 3T.Schematic diagram shown in pressing is installed and is connected, and just becomes electric ballast described in the utility model.
Claims (2)
1, a kind of electric ballast mainly is made up of anti-jamming circuit, current rectifying and wave filtering circuit, higher-order of oscillation switching circuit and output load resonant circuit, it is characterized in that: comprise switching tube in parallel more than two or two in the described higher-order of oscillation switching circuit.
2, electric ballast according to claim 1 is characterized in that: described switching tube is field effect transistor or triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420008072 CN2678308Y (en) | 2004-03-08 | 2004-03-08 | Electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420008072 CN2678308Y (en) | 2004-03-08 | 2004-03-08 | Electronic ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2678308Y true CN2678308Y (en) | 2005-02-09 |
Family
ID=34582794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420008072 Expired - Fee Related CN2678308Y (en) | 2004-03-08 | 2004-03-08 | Electronic ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2678308Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104994652A (en) * | 2015-07-11 | 2015-10-21 | 深圳创智慧能电子科技有限公司 | Intelligent digital control circuit of no-electrolytic-capacitor low-ripple LED driving power supply |
-
2004
- 2004-03-08 CN CN 200420008072 patent/CN2678308Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104994652A (en) * | 2015-07-11 | 2015-10-21 | 深圳创智慧能电子科技有限公司 | Intelligent digital control circuit of no-electrolytic-capacitor low-ripple LED driving power supply |
| CN104994652B (en) * | 2015-07-11 | 2017-09-19 | 深圳创智慧能电子科技有限公司 | The intelligent digital control circuit of no electrolytic capacitor low ripple LED drive power |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050209 Termination date: 20100308 |