CN207692114U - A kind of no-load control circuit and ultraviolet radiator driving circuit - Google Patents
A kind of no-load control circuit and ultraviolet radiator driving circuit Download PDFInfo
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- CN207692114U CN207692114U CN201721856120.7U CN201721856120U CN207692114U CN 207692114 U CN207692114 U CN 207692114U CN 201721856120 U CN201721856120 U CN 201721856120U CN 207692114 U CN207692114 U CN 207692114U
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- resistance
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- ultraviolet radiator
- resistor
- control circuit
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Abstract
The utility model discloses a kind of no-load control circuit and ultraviolet radiator driving circuit, the no-load control circuit includes first resistor and second resistance；The first end of the first resistor is connected on external power circuit, the second end of the first resistor is connected to the first end of second resistance by the filament of the ultraviolet radiator any one end, and the second end of the second resistance is connected to the power end of external active power factor correction circuit.The utility model goes the work of driving active power factor correction circuit (AFPC) by flowing through the voltage of ultraviolet radiator side filament, so that when there is open-circuit condition in electric ballast output no-load or filament, active power factor correction circuit does not work, so that entire main circuit loss reduces, the service life of ultraviolet radiator ensure that.
Description
Technical field
The utility model is related to ultraviolet radiator driving circuits, and in particular to a kind of no-load control circuit and ultraviolet radiator driving
Circuit.
Background technology
Since general lighting is transitioned into rapidly the LED solid state lighting epoch from the discharge lamp epoch, cause entire industrial chain complete
Portion tends to LED industry chain.But conditional electronic ballast is still needed such as the field of UV ultraviolet lamp in certain special dimensions
Device is its mating lighting, but since whole industrial chain tends to the variation of LED industry chain, leads to the upper of UV lamp electric ballast
Trip special chip almost all is in end-of-life state so that the electric ballast is in the available state of no special chip.Work as electricity
There is open-circuit condition in sub-ballast output no-load or filament, if circuit is not protected, the switching tube of main circuit will be in hard
On off state will produce prodigious loss, can lead to product failure quickly.
Utility model content
One of the purpose of this utility model is to provide a kind of no-load control circuit, may be implemented to export when electric ballast
When open-circuit condition occurs in unloaded or filament, significantly reduces the loss of main circuit, ensure that the service life of product.
To achieve the goals above, the technical scheme adopted by the utility model is that：
A kind of no-load control circuit is applied in the driving circuit of ultraviolet radiator comprising first resistor and the second electricity
Resistance；
The first end of the first resistor is connected on external power circuit, and the second end of the first resistor passes through institute
The filament for stating ultraviolet radiator any one end is connected to the first end of second resistance, and the second end of the second resistance is connected to outside
Active power factor correction circuit power end.
Preferably, the first resistor includes resistance R1, resistance R2, resistance R3 and resistance R4, the resistance R1 and resistance
Both ends after R3 series connection constitute the both ends of the first resistor, and the resistance R2 is connected on resistance R1, and the resistance R4 simultaneously connects
In on resistance R3.
Preferably, after the second resistance includes resistance R5, resistance R6 and resistance R7, the resistance R5 and resistance R7 series connection
Both ends constitute the both ends of the second resistance, the resistance R6 is connected on resistance R5.
The two of the purpose of this utility model are to provide a kind of ultraviolet radiator driving circuit, may be implemented to work as electric ballast
When open-circuit condition occur in output no-load or filament, significantly reduces the loss of main circuit, ensure that the service life of ultraviolet radiator.
To achieve the goals above, the technical scheme adopted by the utility model is that：
A kind of ultraviolet radiator driving circuit comprising ultraviolet radiator, power circuit, active power factor correction circuit and
Semi-bridge inversion drive control circuit, wherein the active power factor correction circuit is connected by semi-bridge inversion drive control circuit
The both ends of ultraviolet radiator are connected to, the power circuit is powered for semi-bridge inversion drive control circuit, the ultraviolet radiator driving electricity
Road further includes above-mentioned no-load control circuit.
Preferably, the power circuit includes AC power, filter circuit and rectification circuit, and the AC power passes through filter
Wave circuit is connected to the input terminal of rectification circuit, and the output end of the rectification circuit connects the first end of the first resistor.
Preferably, the power circuit further includes filter capacitor C1, and one end ground connection of the filter capacitor C1, the other end connects
It is connected to the output end of rectification circuit.
Preferably, the filament both ends that the ultraviolet radiator is often held and connect a diode, the semi-bridge inversion drive control
Two output ends of circuit are respectively connected to the cathode of corresponding diode.
A kind of no-load control circuit and ultraviolet radiator driving circuit provided by the utility model, by flowing through ultraviolet radiator one
The voltage of side lamp silk goes the work of driving active power factor correction circuit (AFPC), so that being exported in electric ballast empty
When open-circuit condition occur in load or filament, active power factor correction circuit does not work, so that entire main circuit loss subtracts
It is small, it ensure that the service life of ultraviolet radiator.
Description of the drawings
Fig. 1 is a kind of circuit diagram of no-load control circuit of the utility model embodiment；
Fig. 2 is a kind of circuit diagram of ultraviolet radiator driving circuit of the utility model embodiment.
Specific implementation mode
Embodiment
It please refers to shown in Fig. 1, a kind of no-load control circuit, is applied in the driving circuit of ultraviolet radiator 20 comprising
First resistor and second resistance；
The first end of the first resistor is connected on external power circuit 10, and the second end of the first resistor passes through
The filament of the ultraviolet radiator any one end is connected to the first end of second resistance, and the second end of the second resistance is connected to outside
The power end of the active power factor correction circuit 30 in portion.
The first resistor includes after resistance R1, resistance R2, resistance R3 and resistance R4, the resistance R1 and resistance R3 connect
Both ends constitute the both ends of the first resistor, the resistance R2 is connected on resistance R1, and the resistance R4 is connected to resistance R3
On.The second resistance includes that the both ends after resistance R5, resistance R6 and resistance R7, the resistance R5 and resistance R7 series connection constitute institute
The both ends of second resistance are stated, the resistance R6 is connected on resistance R5.
Why first resistor and second resistance are both provided with it is multiple, its main purpose is, one is by multiple electricity
The series-parallel system of resistance can make the fever of entire circuit smaller, second is that being made up of the Chip-R connection in series-parallel of standard corresponding
The first resistor and second resistance of resistance value, it is cost-effective, third, facilitate configuration mutually in requisition for resistance value.
Why to configure corresponding resistance value, ultraviolet radiator without it is abnormal during, it is ensured that the second of second resistance
The voltage value at end will be sufficient to make the startup of active power factor correction circuit.In addition, it can be with mating protection circuit, in mistake
So that active power factor correction circuit is from starting (this part is not the scope of protection of the utility model) under current conditions.
The operation principle of the utility model is the voltage source that power circuit provides, and passes through first resistor, filament and the second electricity
It powers for active power factor correction circuit after resistance, when there is open-circuit condition in electric ballast output no-load or filament, phase
When occurring short circuit at filament, then the second terminal voltage of second resistance is zero, and active power factor correction circuit cannot start, whole
A circuit does not work, if ultraviolet radiator is intact, the second terminal voltage of second resistance makes active power factor correction circuit open
Dynamic, subsequent sections normal work goes driving ultraviolet radiator.
Please refer to shown in Fig. 2, a kind of ultraviolet radiator driving circuit be provided, be no-load control circuit is applied to it is existing
On ultraviolet radiator driving circuit.Specially：Ultraviolet radiator driving circuit includes ultraviolet radiator 20, power circuit 10, active power
Factor correcting circuit 30 and semi-bridge inversion drive control circuit 40, wherein the active power factor correction circuit 30 passes through
Semi-bridge inversion drive control circuit 40 is connected to the both ends of ultraviolet radiator 20, to drive the work of ultraviolet radiator.The power supply electricity
Road 10 powers for semi-bridge inversion drive control circuit 40, and the ultraviolet radiator driving circuit further includes that above-mentioned unloaded control is electric
Road.The first end of input terminal, that is, first resistor of no-load control circuit and the second end of output end, that is, second resistance are respectively connected to
The power end of the output end and active power factor correction circuit 30 of power circuit 10.
Further, custom circuit may be used in the power circuit 10, includes mainly AC power, filter circuit
11, rectification circuit, filter capacitor C1, the AC power is connected to the input terminal of rectification circuit by filter circuit, described whole
The output end of current circuit connects the first end of the first resistor.One end of the filter capacitor C1 is grounded, and the other end is connected to
The output end of rectification circuit.Rectification circuit uses full-wave rectification bridge.
The filament both ends that the ultraviolet radiator is often held and connect a diode, and the two of the semi-bridge inversion drive control circuit
A output end is respectively connected to the cathode of corresponding diode, and the periphery of ultraviolet radiator is provided with ballast circuit, is also normal
Circuit is advised, which is not described herein again.
According to the disclosure and teachings of the above specification, the utility model those skilled in the art can also be to above-mentioned reality
The mode of applying is changed and is changed.Therefore, the utility model is not limited to specific implementation mode disclosed and described above, right
Some modifications and changes of the utility model should also be as falling into the protection scope of the claims of the present utility model.In addition, to the greatest extent
Some specific terms are used in pipe this specification, these terms are merely for convenience of description, not to the utility model
Constitute any restrictions.
Claims (7)
1. a kind of no-load control circuit is applied in the driving circuit of ultraviolet radiator, which is characterized in that it includes first resistor
And second resistance；
The first end of the first resistor is connected on external power circuit, and the second end of the first resistor passes through the purple
The filament of outside line lamp any one end is connected to the first end of second resistance, and the second end of the second resistance is connected to having for outside
The power end of active power factor correction circuit.
2. no-load control circuit according to claim 1, which is characterized in that the first resistor includes resistance R1, resistance
Both ends after R2, resistance R3 and resistance R4, the resistance R1 and resistance R3 series connection constitute the both ends of the first resistor, the electricity
Resistance R2 is connected on resistance R1, and the resistance R4 is connected on resistance R3.
3. no-load control circuit according to claim 1, which is characterized in that the second resistance includes resistance R5, resistance
Both ends after R6 and resistance R7, the resistance R5 and resistance R7 series connection constitute the both ends of the second resistance, and the resistance R6 is simultaneously
It is connected on resistance R5.
4. a kind of ultraviolet radiator driving circuit comprising ultraviolet radiator, power circuit, active power factor correction circuit and half
Bridge inversion drive control circuit, wherein the active power factor correction circuit is connected by semi-bridge inversion drive control circuit
To the both ends of ultraviolet radiator, the power circuit is powered for semi-bridge inversion drive control circuit, which is characterized in that the ultraviolet light
Lamp drive circuit further includes no-load control circuit as described in any one of claims 1-3.
5. ultraviolet radiator driving circuit as claimed in claim 4, which is characterized in that the power circuit include AC power,
Filter circuit and rectification circuit, the AC power are connected to the input terminal of rectification circuit, the rectified current by filter circuit
The output end on road connects the first end of the first resistor.
6. ultraviolet radiator driving circuit as claimed in claim 5, which is characterized in that the power circuit further includes filter capacitor
One end of C1, the filter capacitor C1 are grounded, and the other end is connected to the output end of rectification circuit.
7. ultraviolet radiator driving circuit as claimed in claim 4, which is characterized in that the filament both ends that the ultraviolet radiator is often held
And a diode is connect, two output ends of the semi-bridge inversion drive control circuit are respectively connected to the negative of corresponding diode
Pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721856120.7U CN207692114U (en) | 2017-12-28 | 2017-12-28 | A kind of no-load control circuit and ultraviolet radiator driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721856120.7U CN207692114U (en) | 2017-12-28 | 2017-12-28 | A kind of no-load control circuit and ultraviolet radiator driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207692114U true CN207692114U (en) | 2018-08-03 |
Family
ID=62996197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721856120.7U Active CN207692114U (en) | 2017-12-28 | 2017-12-28 | A kind of no-load control circuit and ultraviolet radiator driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207692114U (en) |
-
2017
- 2017-12-28 CN CN201721856120.7U patent/CN207692114U/en active Active
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