CN2886980Y - Electronic ballast for DC fluorescent lamp - Google Patents
Electronic ballast for DC fluorescent lamp Download PDFInfo
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- CN2886980Y CN2886980Y CN 200520121302 CN200520121302U CN2886980Y CN 2886980 Y CN2886980 Y CN 2886980Y CN 200520121302 CN200520121302 CN 200520121302 CN 200520121302 U CN200520121302 U CN 200520121302U CN 2886980 Y CN2886980 Y CN 2886980Y
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Abstract
The utility model discloses a DC fluorescent lamp electronic ballast consisting of a voltage-doubling intensity-modulated circuit, a filter circuit, a voltage-reduction circuit, a rectification filter circuit, a lamp constant-current circuit, a filament preheating circuit and an automatic polarity-reversing circuit. The ballast can eliminate high-frequency electromagnetic interferences, prolong service life of the lamp, eliminate stroboscopic and electromagnetic radiation and solve the problem that electromagnetic radiation generated by the electronic ballast damages human brains and health.
Description
Technical field
The utility model belongs to DC fluorescent lamp electric ballast technical field, is a kind of DC fluorescent lamp electric ballast.
Background technology
The electronic ballast for fluoresent lamp that uses has Inductive ballast and electric ballast two big classes at present.The major defect of Inductive ballast is that oneself power consumption is big, and efficient is low, and what have has a noise, and the low-pressure low-temperature starter is difficult and stroboscopic arranged.In order to address the above problem, late nineteen seventies is developed electric ballast.Electric ballast generally is to become the high-frequency current of 30～60KHZ to supply with fluorescent tube through commutation inversion the civil power of 50HZ, can solve low voltage starting and eliminate part stroboscopic problem.But fundamentally thoroughly do not eliminate stroboscopic.Owing to adopt high-frequency oscillating circuits generation electromagnetic interference and higher harmonics, electromagenetic wave radiation.Long-time use causes certain harm to people's brain and health.
Summary of the invention
The purpose of this utility model aims to provide a kind of realization can lie prostrate 140V～normal starter of 260V situation in the city, and does not have electromagenetic wave radiation, and harmonic content is low, electromagnetic interference is low.No high frequency stroboscopic and low frequency stroboscopic, adaptive and technical parameter reaches the DC fluorescent lamp electric ballast of GB with fluorescent tube on the market.
For realizing the purpose of this utility model, described DC fluorescent lamp electric ballast is made up of multiplication of voltage starting circuit, filter circuit, reduction voltage circuit, current rectifying and wave filtering circuit, fluorescent tube constant-current circuit, filament preheating circuit, polarity automatic switching circuit, filter circuit is connected on the power input, and reduction voltage circuit is connected on the input of current rectifying and wave filtering circuit; Before described multiplication of voltage starting circuit input was connected to the reduction voltage circuit input, the fluorescent tube constant-current circuit was serially connected with on the output of described current rectifying and wave filtering circuit, was provided with isolating diode in the serial connection loop; Between described multiplication of voltage starting circuit output termination fluorescent tube constant-current circuit input and the diode; The silk preheat circuit is serially connected with on the output of described current rectifying and wave filtering circuit; The output termination polarity automatic switching circuit positive pole of fluorescent tube constant-current circuit, the output termination polarity automatic switching circuit starter end of filament preheating circuit.
After the energized, alternating current is added on the multiplication of voltage starting circuit from power input one tunnel, is added on the fluorescent tube by the fluorescent tube constant-current circuit after making its output produce about 1000 volts voltage, makes lamp tube starting.Another road enters filter circuit, the high-frequency electrical ripple is proofreaied and correct, through reduction voltage circuit output low-tension supply, again by the current rectifying and wave filtering circuit output dc voltage, the output current of this moment forms continuous current after by filament preheating circuit, be added on the fluorescent tube, making fluorescent tube is constant lighting the electric current that passes through the back.Mainly by 50～100 volts of direct currents of current rectifying and wave filtering circuit output, provide constant operating current for fluorescent tube behind the tube starting, guarantee that fluorescent tube is normally luminous through diode, fluorescent tube constant-current circuit.Owing to adopted filter circuit and filament preheating circuit, can eliminate effectively that high-frequency electromagnetic disturbs and prolonging lamp tube useful life, the fluorescent tube constant-current circuit is supplied with the fluorescent tube constant DC and is flowed, and realizes the purpose of no stroboscopic electromagnetic-radiation-free.Fluorescent tube can weaken at the luminosity of logical direct current positive terminal after a period of time, adopts fluorescent tube insulation and polarity automatic switching circuit can solve this phenomenon.
Description of drawings
The drawing of accompanying drawing is described as follows:
Fig. 1 is the circuit block diagram of the utility model DC fluorescent lamp electric ballast.
Fig. 2 is for realizing the circuit theory diagrams of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the utility model DC fluorescent lamp electric ballast is described in further detail:
As shown in fig. 1, the utility model DC fluorescent lamp electric ballast comprises power input, filter circuit, reduction voltage circuit, multiplication of voltage starting circuit; Current rectifying and wave filtering circuit, diode, filament preheating circuit, fluorescent tube constant-current circuit, polarity automatic switching circuit.
As shown in Figure 2, described filter circuit includes the inductance L that is serially connected in circuit input end
1, resistance R 1 and be attempted by the capacitor C of power input
A
Described multiplication of voltage starting circuit comprises capacitor C 5-C9, and diode D7-D12 forms common multiplication of voltage starting circuit.Multiplication of voltage starting circuit input is connected with the filter circuit output, and high-voltage output end is connected with fluorescent tube constant-current circuit input, and the fluorescent lamp FPL that is connected by the polarity automatic switching circuit forms a loop to the negative pole of current rectifying and wave filtering circuit.
Described reduction voltage circuit include the capacitor C F that is serially connected in the input circuit and with itself and the resistance R 2 that connects, be serially connected between filter circuit output and the current rectifying and wave filtering circuit input.
Described current rectifying and wave filtering circuit is formed bridge rectifier filter circuit by four diode D1-D4, IC0356, capacitor C 1 and resistance R 3, and output provides working direct current for fluorescent tube constant-current circuit and filament preheating circuit for fluorescent tube.
Described diode is to be in series by two diode D5, D6, is connected across on the output of the cathode output end of current rectifying and wave filtering circuit and multiplication of voltage start-up circuit.
Described fluorescent tube constant-current circuit includes collector and emitter and is serially connected in triode VT1 in the output loop, is attempted by the capacitor C 4 and resistance R 7 that are attempted by after resistance R 6 on collector electrode and the base stage and the serial connection on base stage and the emitter.
Described filament preheating circuit comprises R5, R8 and rectifier diode D13 (also available one-way SCR).
Described polarity automatic switching circuit comprises R10-R14, C2, C10, VT2, D13, IC555 relay composition (also available other IC replaces IC555, also available controllable silicon replaces relay) by on R4 and the voltage-stabiliser tube cross-over connection rectifying and wave-filtering rear end positive and negative terminal.
Reduction voltage circuit, the multiplication of voltage starting circuit is common circuit, and its operation principle is not described further at this.
The operation principle of filter circuit is: electric power incoming line is the most concentrated place of electromagnetic interference, series inductance L1, R1, shunt capacitance CA herein, when alternating current during by series inductance, inductance produces impedance and stops high-frequency signal to pass through, CA effectively eliminates the high-frequency signal short circuit high-frequency electromagnetic and disturbs.
Current rectifying and wave filtering circuit is made up of diode D1-D4, IC0356, resistance R 3, capacitor C 1.The D1-D4 rectifier bridge converts alternating current to direct voltage, and D3 connects with IC0356 and makes its harmonic content up to standard.
When tube starting, produce 1000 volts of left and right sides high direct voltages by the multiplication of voltage starting circuit, be used for glow starting fluorescent lamp FPL, oppositely be added on the dc low-voltage of 50-100 volt for preventing high direct voltage, available two series diode D5, D6 guarantee the operate as normal of fluorescent tube constant-current circuit as intercepting.
The filament preheating circuit operation principle is: there is identical filament at the conventional fluorescent lamps two ends, when power supply is direct current, an end lamp that connects negative pole is the resistance utmost point, and connect an anodal end filament is anode, generally do not possess cold utmost point emission, Gu cathode filament is preheating in the course of the work, form by thermistor R5, resistance R 8, rectifier diode D13 (also available controllable silicon).Carry out preheating for cathode filament provides constant electric current, fluorescent tube is difficult for blackout during work, but the useful life of prolonging lamp tube.
Fluorescent tube constant-current circuit operation principle is: form constant-current circuit by triode VT1, resistance R 6, R7 and capacitor C 4, can be fluorescent lamp FPL constant operating current is provided, realize the purpose of no stroboscopic.
The utility model is owing to adopted filter circuit, filament preheating circuit, current rectifying and wave filtering circuit (special) is harmonic carcellation effectively, eliminate High-frequency Interference and prolonging lamp tube useful life, the fluorescent tube constant-current circuit is supplied with fluorescent tube constant DC stream, realizes that no stroboscopic does not have the purpose of electromagenetic wave radiation.
Claims (7)
1. a DC fluorescent lamp electric ballast is made up of multiplication of voltage starting circuit, filter circuit, reduction voltage circuit, current rectifying and wave filtering circuit, fluorescent tube constant-current circuit, filament preheating circuit, polarity automatic switching circuit, it is characterized in that filter circuit is connected on the power input, reduction voltage circuit is connected on the input of current rectifying and wave filtering circuit; Before described multiplication of voltage starting circuit input was connected to the reduction voltage circuit input, the fluorescent tube constant-current circuit was serially connected with on the output of described current rectifying and wave filtering circuit, was provided with isolating diode in the serial connection loop; Described multiplication of voltage starting circuit output connects between fluorescent tube constant-current circuit input and the diode; Filament preheating circuit is serially connected with on the output of described current rectifying and wave filtering circuit; The output termination polarity automatic switching circuit positive pole of fluorescent tube constant-current circuit, the output termination polarity automatic switching circuit starter end of filament preheating circuit.
2. DC fluorescent lamp electronics suppression stream device according to claim 1 is characterized in that described filter circuit includes inductance L 1, resistance R 1 that is serially connected in the input circuit and the capacitor C A that is attempted by power input.
3. DC fluorescent lamp electronics according to claim 1 and 2 suppression stream device, it is characterized in that described reduction voltage circuit include the capacitor C 1 that is serially connected in the input circuit and with itself and the resistance R 3 that connects.
4. DC fluorescent lamp electronics suppression stream device according to claim 1 and 2 is characterized in that described current rectifying and wave filtering circuit comprises D1---D4, IC0356, rectifier bridge and an electrochemical capacitor, a resistance that this IC0356 is made up of 4 rectifier diodes constitute.
5. DC fluorescent lamp electronics suppression stream device according to claim 1 and 2, it is characterized in that described fluorescent tube constant-current circuit includes collector and emitter and is serially connected in triode VT1 in the output loop, be attempted by the capacitor C 4 and the resistance R 7 that are attempted by after resistance R 6 on collector electrode and the base stage and the serial connection on base stage and the emitter.
6. DC fluorescent lamp electronics suppression stream device according to claim 1 and 2 is characterized in that described filament preheating circuit comprises R5, R8 and rectifier diode D13 or one-way SCR.
7. DC fluorescent lamp electronics according to claim 1 and 2 suppression stream device, it is characterized in that described polarity automatic switching circuit comprise be connected across behind the rectifying and wave-filtering on the positive pole resistance R 4, voltage-stabiliser tube and electrochemical capacitor C10, C2, resistance R 11---R14, IC555, transistor VT2 emitter connect on the negative pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520121302 CN2886980Y (en) | 2005-12-26 | 2005-12-26 | Electronic ballast for DC fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520121302 CN2886980Y (en) | 2005-12-26 | 2005-12-26 | Electronic ballast for DC fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2886980Y true CN2886980Y (en) | 2007-04-04 |
Family
ID=37962065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520121302 Expired - Fee Related CN2886980Y (en) | 2005-12-26 | 2005-12-26 | Electronic ballast for DC fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2886980Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106704996A (en) * | 2017-02-24 | 2017-05-24 | 曲延生 | Intelligent lamp power supply module without frequent flash |
-
2005
- 2005-12-26 CN CN 200520121302 patent/CN2886980Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106704996A (en) * | 2017-02-24 | 2017-05-24 | 曲延生 | Intelligent lamp power supply module without frequent flash |
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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: LI ZHICHENG Free format text: FORMER OWNER: WANG SONGLAI Effective date: 20081031 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081031 Address after: Heshan City, No. 588 Guangdong Sha Ping Town Heshan City Avenue Heshan Xinli Electric Appliance Co. Ltd., zip code: 529000 Patentee after: Li Zhicheng Address before: Hunan Province, Wugang City Office of ten yuan men Kou village innovation group, zip code: 422400 Patentee before: Wang Songlai |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070404 Termination date: 20100126 |