CN2290965Y - High power factor compact fluorescent lamp - Google Patents
High power factor compact fluorescent lamp Download PDFInfo
- Publication number
- CN2290965Y CN2290965Y CN97232438U CN97232438U CN2290965Y CN 2290965 Y CN2290965 Y CN 2290965Y CN 97232438 U CN97232438 U CN 97232438U CN 97232438 U CN97232438 U CN 97232438U CN 2290965 Y CN2290965 Y CN 2290965Y
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- Prior art keywords
- circuit
- power factor
- utility
- model
- fluorescent lamp
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- 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 - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model relates to a high power factor compact fluorescent lamp, which comprises a rectification circuit, a trigger circuit, a high-frequency switching circuit, a resonant circuit and a load. The utility model is characterized in that an electromagnetic interference filter is connected between the output end of an AC power supply and the input end of a power rectifier, a power factor compensating circuit is arranged, the input end of the power factor compensating circuit is connected with the input end of the rectification circuit, and the output end of the power factor compensating circuit is connected with the output end of the resonant circuit. The utility model has the advantages of simple circuit, high power factor, small harmonic content and stable work, electric current peak coefficients can reach the standards simultaneously, and the utility model is suitable for various abnormal situations.
Description
The utility model belongs to a kind of glow discharge spot lamp, particularly a kind of High Power Factor fluorescent lamp that has abnormal condition protection.
The luminous electric ballast of driving fluorescent lamp pipe is that power-frequency voltage is become pulse direct current through bridge rectifier, pass through filtering again after, by oscillating circuit and power amplification circuit, become finally that high-frequency alternating current finishes the work.The basic index of weighing the electric ballast quality has power factor, harmonic current content and current wave crest ratio coefficient, electronic ballast for fluoresent lamp adopts three kinds of circuit substantially at present: first kind is ball bearing made using, be characterized in low cost, make simply, volume is little, and is in light weight, but the power factor of sort circuit is low, the harmonic content height, the life-span is low, can cause severe contamination to electrical network; Therefore second kind is improved circuit, and power factor compensates, and can reach more than 0.9, and triple-frequency harmonics content can be less than 30%, but crest factor is still higher, has a strong impact on the useful life of fluorescent lamp; The third is the active compensation circuit, and its power factor can reach more than 0.99, and triple-frequency harmonics content is less than 10%, and crest factor is 1.4-1.5, but the circuit more complicated, components and parts are more, the cost height, and volume is big, is not suitable for the compact integrated lamp.
The purpose of this utility model provides that a kind of circuit is simple, power factor is high, harmonic content is little, the electric current crest factor can both be simultaneously up to standard, and working stability, is applicable to the electronic fluorescent lamp of various abnormal conditions.
The purpose of this utility model is achieved in that it comprises rectification circuit, circuits for triggering, high-frequency conversion circuit, resonant circuit and load, and its technical scheme main points are: connect Electromagnetic interference filter between ac power output and rectification circuit input end; And power factor compensation circuit is set, and its input connects the output of resonant circuit, and its output connects the output of rectification circuit.
The utility model has the advantages that: owing to before the rectifier power source input, Electromagnetic interference filter is set; harmonic content is little; good stability; simultaneously because power factor compensation circuit is set; the power factor height, the electric current crest factor can both be simultaneously up to standard, can finish self-protection for the operation irregularity situation; long working life is arranged, and circuit is fairly simple.
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the utility model logic diagram of circuit.
Fig. 2 is circuit theory diagrams of the present utility model.
See Fig. 1,2, concrete structure of the present utility model is as follows: ac power input end serial connection fuse BX and thermistor R11, piezo-resistance Rv is connected in parallel on power input.Electromagnetic interference filter adopts filter inductor L1, its input termination ac power output, and output termination rectification circuit input end has good inhibition to the interference of electromagnetism; Connect into bridge rectifier by four diode D1-D4.Two triode T1, T2 and pulse transformer B1 in the high-frequency conversion circuit connect and compose inverter, and the end of the primary coil L4 of pulse transformer B1 is connected with inverter output end, and the other end is connected with the primary coil L5 of ballast B2; Secondary coil L2 one end of pulse transformer B1 is connected with primary coil L4, and the other end is connected through the base stage of resistance R 2 with triode T1.The end of the primary coil L3 of pulse transformer B1 is connected with negative pole, and the other end is connected through the base stage of resistance R 4 with triode T2.Diac D6 and resistance R 1, capacitor C 2 connect and compose circuits for triggering.Circuits for triggering input and output connect rectification circuit output end and high-frequency conversion circuit input respectively.Resonant circuit is made up of ballast transformer B2 and resonance capacitor C 3, and two elementary taps of ballast transformer B2 connect primary coil L4 and the load of pulse transformer B1 respectively, on two negative electrodes of resonant capacitance C3 two ends serial connection load, and and thermistor Rt2 parallel connection.Power factor compensation circuit adds centre cap by ballast transformer secondary and two diode D7, D8 connect and compose, and secondary two taps of ballast transformer B2 connect two diode D7, D8 respectively, through diode D7, D8 capacitor C 1 are charged; The anode of the negative terminal of diode D5 and electric current output is connected, and anode is connected with the anode of capacitor C 1, only guarantee when supply voltage is lower than voltage on the capacitor C 1, and the conducting of diode D5, and capacitor C 1 release energy stored offers load.
Operation principle: after the energising, civil power is by fuse BX, filtered from the disturbing pulse of power supply and the inverter electromagnetic interference to the power supply radiation by filter L1.When supply voltage surpassed permissible value in the design, the piezo-resistance Rv at parallel connection power supply two ends punctured work, and overvoltage protection is made in the BX quick-break simultaneously.When ballast inside caused current surge owing to some abnormality, series connection thermistor RT1 in the line can be operated in high-impedance state rapidly, makes the high-frequency inverter failure of oscillation, to guarantee the safety of each components and parts of fluorescent lamp.By after the rectifier D1-D4 rectification directly to inverter power supply, send out through resistance R 1, capacitor C 2, diode D6 and to touch triode T1, make it conducting, repeated to change and made triode T1, T2 take turns conducting output high-frequency current by the synthetic positive and negative periodicity of magnetic flux of pulse transformer B1, coils L3, L5 and resonance capacitor C 3 start lamp works.And make accessory power supply by secondary capacitor C 1 is charged of ballast transformer B2, and power factor is improved greatly, therefore the source current wave distortion also reduces.Because the thermistor R12 that has connected and had positive temperature coefficient between two negative electrodes of load makes negative electrode in fully heating back startup, the black powder phenomenon of the sputter of having avoided the cold cathode hard excitation to cause, this is the key of prolonging lamp tube service life.
Through actual measurement, the power factor of electronic energy-saving lamp of the present utility model can reach more than 0.95, and the source current crest factor is about 1.50, and the harmonic wave total content is about 20%.Abnormality self-protection reliable in action, tube cathode pipeline start up by preheating prolong it makes about one times of life-span.The utility model is simple in structure, and circuit is reliable and stable, and debugging is convenient, is applicable to the compact integrated lamp, also can be used for being mounted to the straight-pipe fluorescent lamp of large volume.
Claims (2)
1, a kind of compact fluorescent lamp of High Power Factor, it comprises rectification circuit, circuits for triggering, high-frequency conversion circuit, resonant circuit and load, it is characterized in that: connect Electromagnetic interference filter between ac power output and rectifier power source input; And power factor compensation circuit is set, and its input connects the output of the circuit that shakes, and its output connects the output of rectification circuit.
2, compact fluorescent lamp according to claim 1 is characterized in that; Power factor compensation circuit adds centre cap by ballast transformer secondary and two diodes connect and compose, and secondary two taps of ballast transformer connect two diodes respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97232438U CN2290965Y (en) | 1997-03-17 | 1997-03-17 | High power factor compact fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97232438U CN2290965Y (en) | 1997-03-17 | 1997-03-17 | High power factor compact fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2290965Y true CN2290965Y (en) | 1998-09-09 |
Family
ID=33944246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97232438U Expired - Fee Related CN2290965Y (en) | 1997-03-17 | 1997-03-17 | High power factor compact fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2290965Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104039061A (en) * | 2014-06-10 | 2014-09-10 | 国网四川省电力公司双流县供电分公司 | Halogen lamp electronic transformer |
-
1997
- 1997-03-17 CN CN97232438U patent/CN2290965Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104039061A (en) * | 2014-06-10 | 2014-09-10 | 国网四川省电力公司双流县供电分公司 | Halogen lamp electronic transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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 |