CN201393338Y - Eelctrodeless lamp ballast circuit - Google Patents
Eelctrodeless lamp ballast circuit Download PDFInfo
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- CN201393338Y CN201393338Y CN200820215749U CN200820215749U CN201393338Y CN 201393338 Y CN201393338 Y CN 201393338Y CN 200820215749 U CN200820215749 U CN 200820215749U CN 200820215749 U CN200820215749 U CN 200820215749U CN 201393338 Y CN201393338 Y CN 201393338Y
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Abstract
The utility model relates to an electrodeless lamp ballast circuit, which comprises a filter rectifying circuit, a power factor correction circuit, a power output circuit, a semi-bridge driving circuit, an output sampling circuit and a starting protective circuit. The starting protective circuit is connected with a direct current output end DCBUS of the power factor correction circuit, a current detection end SMP of the power output circuit, an electrodeless lamp tube, an output end VSMP of the output sampling circuit and a protective signal end or a power source end VDD of the semi-bridge driving circuit; and after acquiring the power source, the starting protective circuit detects whether the electrodeless lamp tube exists or bursts or not, and if the electrodeless lamp tube does not exist or exists but bursts, a protective signal is timely sent to the semi-bridge driving circuit to stop the work of the semi-bridge driving circuit. The utility model not only has a plurality of abnormal protections (short circuit protection, open circuit protection during running and overcurrent protection) and the like, but also has open circuit starting protection and burst lamp starting protection functions.
Description
Technical field
The utility model relates to a kind of electroless lamp ballasting circuit, especially a kind of ballasting circuit that starts defencive function that possesses that is used for electromagnetic induction electrodeless lamp.
Background technology
Electromagnetic induction electrodeless lamp is high light efficiency, long-life electricity-saving lamp of new generation.Electromagnetic induction electrodeless lamp is owing to broken through traditional incandescent lamp, the mode of operation of gaseous discharge lamp, the discharge working method that it does not need electrode makes traditional glow discharge spot lamp owing to the electrode sputter causes that fluorescent tube blackout or electrode emission material exhaust problems such as causing the lamp tube service life termination and be avoided and overcome.Characteristics such as its high light efficiency, long-life, high-color rendering, light are stable make it become one of ideal green lighting source.
Electromagnetic induction electrodeless lamp is combined by electric ballast, power coupling coil, electrodeless fluorescent fluorescent tube at present.Its fluorescent tube is a vacuum discharge cavity, form continuous closure discharge loop, discharge cavity is by winding the central axis with the annular ferrite core of power coupling coil, and the high-frequency electromagnetic energy that electric ballast produces is coupled in the plasma of discharge by the power coupling coil.Power coupling coil and discharging chamber can be considered as the primary and secondary of a transformer, produce the magnetic flux of alternation by the electric current of coil, and then keep luminescence of plasma along discharge cavity generation induction field again.
The special working method of electromagnetic induction electrodeless has proposed special requirement to ballast, how to guarantee electromagnetic induction electrodeless lamp safety, reliable, controlled, stably work, be that the electroless lamp ballasting device is designed and developed the problem that emphasis will solve.Existing technology ubiquity following problem:
(1) open circuit does not start protection, does not connect at fluorescent tube under the state of ballast, and ballast powers on and is easy to cause the damage of ballast self;
(2) broken lamp starts protection, breaks and can't start the time, ballast powers on and is easy to cause the damage of ballast self at fluorescent tube.
Summary of the invention
The purpose of this utility model is to provide a kind of electroless lamp ballasting circuit, except the abnormal protection (short-circuit protection, open-circuit-protection in service, overcurrent protection) that possesses multiple routine, also possesses open circuit and starts protection, broken lamp startup defencive function.
The utility model is to realize above-mentioned purpose like this:
A kind of electroless lamp ballasting circuit; comprise filter rectifier; circuit of power factor correction; power output circuit; half-bridge drive circuit; the output sample circuit; also comprise the startup protective circuit; start the dc output end DCBUS of protective circuit and circuit of power factor correction; the current detecting end SMP of power output circuit; electrodeless lamp fluorescent tube; the output VSMP of output sample circuit; starting protective circuit links to each other with the guard signal end or the power end VDD of half-bridge drive circuit; after starting protective circuit acquisition power supply; whether whether detect electrodeless fluorescent tube exists and breaks; if electrodeless fluorescent tube does not exist or exists but breaks, then in time send guard signal it is quit work to half-bridge drive circuit.
The utility model further improves and is, the output isolation capacitance C29 in the described power output circuit (4) starts protective circuit and is connected with electrodeless fluorescent tube to any point between the electrodeless fluorescent tube by output isolation capacitance C29.
The utility model further improves and is, the inductance L 5 ' of output sample circuit and the inductance L 5 of power output circuit are on same magnetic core.
The utility model further improves and is, but the recovery temperature fuse TF1 of described power output circuit is connected on the outlet line.
Adopt technique scheme, ballasting circuit reliability height, power factor height that the utility model provides have the measuring ability to electrodeless light tube electric voltage, electric current, can export to keep the stable of power stability and light output by permanent power; Electrodeless fluorescent tube overcurrent, overvoltage, short circuit, open-circuit-protection can be provided; Can also provide open circuit to start protection, broken lamp startup defencive function.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model;
Identical signs all on circuit theory Fig. 2 of the present utility model all link together.
Embodiment
Further specify the technical solution of the utility model below in conjunction with drawings and Examples.
With reference to Fig. 1, Fig. 2, electroless lamp ballasting circuit provided by the utility model comprises filter rectifier 1, circuit of power factor correction 2, half-bridge drive circuit 3, power output circuit 4, output sample circuit 5, starts protective circuit 6.
The input power supply send circuit of power factor correction 2 to obtain the direct current of voltage regulation that boosts after filter rectifier 1 rectification, and this direct current is lighted electrodeless fluorescent tube 7 through the operating voltage that the power output circuit 4 by half-bridge drive circuit 3 controls produces high-frequency and high-voltage.
Output sample circuit 5 links to each other with power output circuit 4, and the output voltage that obtains power output circuit 4 passes to half-bridge drive circuit 3 by line, obtains the current signal of power output circuit 4, passes to by line to start protective circuit 6.
Starting protective circuit 6 links to each other with output, the half-bridge drive circuit 3 of the dc output end of circuit of power factor correction 2, the current detecting end of power output circuit 4, electrodeless lamp fluorescent tube 7, output sample circuit 5; after starting protective circuit 6 acquisition power supplys; whether whether it detect electrodeless fluorescent tube 7 and exist and break; if electrodeless fluorescent tube 7 does not exist or exists but breaks, then in time send the startup guard signal with the protection ballasting circuit to half-bridge drive circuit 3.
After starting, half-bridge drive circuit 3 enters electrodeless lamp fluorescent tube 7 start-up routines automatically; driving power output circuit 4 carries out electrodeless lamp fluorescent tube 7 starters; adjusting is dynamically exported according to the output signal that output sample circuit 5 transmits in starter success back; keep electrodeless lamp fluorescent tube 7 under certain power, to work, and the protection of taking to stop to export according to various abnormal conditions is at any time moved.In electrodeless lamp fluorescent tube 7 starter processes,, will stop the starter process immediately if half-bridge drive circuit 3 is received the guard signal that starts protective circuit 6.
Describe a kind of circuit structure of electroless lamp ballasting circuit below in detail:
1, filter rectifier 1, comprises filter circuit that capacitor C 1 to C8, inductance L 1, L2, L3 are formed and bridge rectifier B1 etc.Ac input circuit links to each other with filter circuit, and its effect is the electromagnetic interference that suppresses on the electrical network, suppresses the electromagnetic interference that ballasting circuit itself produces simultaneously, with the protection electrical network.Bridge rectifier B1 carries out obtaining to keep after the rectification direct current supply of subsequent conditioning circuit work to alternating current.Excessive for fear of the cold start-up electric current in addition, thermistor NTC is series at power input.For fear of the overcurrent damaged line, also protective tube is arranged at the power input string.
2, circuit of power factor correction 2, comprise a power factor controlling integrated circuit (IC) 2 and peripheral cell thereof.DCBUS provides constant DC voltage at output.
3, half-bridge drive circuit 3, comprise half-bridge driven integrated circuit (IC) 1 and peripheral cell thereof etc.
4, power output circuit 4, and the operating voltage that produces high-frequency and high-voltage under the driving of half-bridge drive circuit 3 is lighted electrodeless lamp fluorescent tube 7, but comprises metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, capacitor C 29 recovery temperature fuse TF1, inductance L 5, capacitor C 30, transformer L4 etc.The drain electrode of metal-oxide-semiconductor Q1 is connected with the output DCBUS of circuit of power factor correction 2, and the source electrode of metal-oxide-semiconductor Q1 is connected with the drain electrode of metal-oxide-semiconductor Q2, and the source electrode of metal-oxide-semiconductor Q1 meets current sampling point SMP; The gate series resistance R40 of metal-oxide-semiconductor Q1 connects; Be connected with half-bridge drive circuit 4 after the gate series resistance R42 of metal-oxide-semiconductor Q2.But be connected with output sample circuit 6 after the secondary other end series capacitance C29 recovery temperature fuse TF1 of transformer L4, inductance L 5, the capacitor C 30; C30 and electrodeless lamp fluorescent tube 7 are connected in parallel.
5, output sample circuit 5 comprises output voltage sampled inductance L5 ', output current sample resistance R34 etc.L5 ' is used to respond to output voltage waveforms for being attached to the sample coil on the L5, obtains output voltage signal.
6, start protective circuit 6, start protective circuit 6 and link to each other with output VSMP, the guard signal end or the power end VDD of half-bridge drive circuit 3 of the dc output end DCBUS of circuit of power factor correction 2, the current detecting end SMP of power output circuit 4, electrodeless lamp fluorescent tube 7, output sample circuit 5.Can connect to any point between the electrodeless lamp fluorescent tube 7 at output isolation capacitance C30 with being connected of electrodeless fluorescent tube 7, but such as the two ends of output choke induction L5 or the two ends of recovery temperature fuse TF1.
The principle of ballasting circuit is as follows:
After the energized, obtain working power, under the control of power factor controlling integrated circuit (IC) 2, make the power factor of whole ballasting circuit can reach more than 0.99 through circuit of power factor correction 2; The power input alternating voltage 85V～to 265V～between keep the direct voltage of output DCBUS constant when changing; Total harmonic distortion with ballasting circuit is controlled in 8% simultaneously.
After starting protective circuit 6 and obtaining power supplys, detect electrodeless fluorescent tube 7 and whether exist and whether break, if electrodeless fluorescent tube 7 does not exist or exists but breaks, then in time send guard signal it is quit work to half-bridge drive circuit 3.When capacitor C 26 chargings of half-bridge drive circuit 3 reached 11V, half-bridge driven integrated circuit (IC) 1 started, the oscillating circuit starting of oscillation, and beginning provides symmetrical square wave driving signal to power output circuit 4, and power output circuit 4 is started working.What half-bridge driven integrated circuit (IC) 1 was at first carried out is the starter process: carry out frequency scanning from high to low, low-limit frequency is by resistance R 30 and capacitor C 22 decisions; When scanning frequency progressively is reduced to a certain degree, produce high pressure at capacitor C 30 two ends, realize the starter of electrodeless fluorescent tube 7.Half-bridge drive circuit 3 enters normal operating conditions subsequently.
The voltage sampling inductance L 5 ' of output sample circuit 5 is exported VSMP from the L5 induced voltage through obtaining the voltage state signal on the electrodeless fluorescent tube 7 after the rectification and being delivered to; Current sampling resistor R34 obtains the current state signal on the electrodeless fluorescent tube 7 and is delivered to half-bridge drive circuit 3, enters half-bridge driven integrated circuit (IC) 1 by resistance R 35 and resistance R 28.Half-bridge driven integrated circuit (IC) 1 is adjusted output frequency according to the output situation, and the closed-loop adjustment power output makes it constant; If the situations such as open circuit, short circuit, overcurrent, overvoltage that occur then stop to drive output automatically, enter guard mode, simultaneously up to next power supply electrifying.
But the recovery temperature fuse TF1 of power output circuit 4 is connected on the outlet line, with automatic rupturing duty output, is reduced to a certain degree just recovery connection automatically up to temperature when the ballasting circuit working temperature is too high, plays the effect of overtemperature protection.
Claims (4)
1; a kind of electroless lamp ballasting circuit; comprise filter rectifier (1); circuit of power factor correction (2); half-bridge drive circuit (3); power output circuit (4); output sample circuit (5); it is characterized in that: described ballasting circuit also comprises startup protective circuit (6); the dc output end DCBUS of described startup protective circuit (6) and circuit of power factor correction (2); the current detecting end SMP of power output circuit (4); electrodeless lamp fluorescent tube (7); the output VSMP of output sample circuit (5); starting protective circuit (6) links to each other with the guard signal end or the power end VDD of half-bridge drive circuit (3); after starting protective circuit (6) acquisition power supply; whether it detects electrodeless fluorescent tube (7) and exists or do not break; if electrodeless fluorescent tube (7) does not exist or exists but breaks, then in time send guard signal and it is quit work to half-bridge drive circuit (3).
2, want 1 described electroless lamp ballasting circuit according to right; it is characterized in that: the output isolation capacitance C29 in the described power output circuit (4) starts protective circuit (6) and is connected with electrodeless fluorescent tube (7) to any point between the electrodeless fluorescent tube (7) by output isolation capacitance C29.
3, want 1 described electroless lamp ballasting circuit according to right, it is characterized in that: the inductance L 5 ' of output sample circuit (5) and the inductance L 5 of power output circuit (4) are on same magnetic core.
4, want 1 described electroless lamp ballasting circuit according to right, it is characterized in that: described power output circuit (4) but recovery temperature fuse TF1 be connected on the outlet line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820215749U CN201393338Y (en) | 2008-11-27 | 2008-11-27 | Eelctrodeless lamp ballast circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820215749U CN201393338Y (en) | 2008-11-27 | 2008-11-27 | Eelctrodeless lamp ballast circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201393338Y true CN201393338Y (en) | 2010-01-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200820215749U Expired - Fee Related CN201393338Y (en) | 2008-11-27 | 2008-11-27 | Eelctrodeless lamp ballast circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201393338Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101820714A (en) * | 2010-04-22 | 2010-09-01 | 上海电机学院 | Start protection and intelligent control interface circuit for low frequency electrodeless lamp |
-
2008
- 2008-11-27 CN CN200820215749U patent/CN201393338Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101820714A (en) * | 2010-04-22 | 2010-09-01 | 上海电机学院 | Start protection and intelligent control interface circuit for low frequency electrodeless lamp |
| CN101820714B (en) * | 2010-04-22 | 2012-10-17 | 上海电机学院 | Start protection and intelligent control interface circuit for low frequency electrodeless lamp |
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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: 20100127 Termination date: 20131127 |