CN204335082U - A kind of DC power converter circuit for lighting - Google Patents
A kind of DC power converter circuit for lighting Download PDFInfo
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- CN204335082U CN204335082U CN201420858820.XU CN201420858820U CN204335082U CN 204335082 U CN204335082 U CN 204335082U CN 201420858820 U CN201420858820 U CN 201420858820U CN 204335082 U CN204335082 U CN 204335082U
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Abstract
The utility model discloses a kind of DC power converter circuit for lighting; comprise filter circuit, current foldback circuit and open loop protection circuit; filter circuit comprises electric capacity C1, electric capacity C2 and resistance R1; current foldback circuit comprises inductance L 1, a triode VT1 triode VT2, and open loop protection circuit comprises discharge tube T, resistance R7, diode D3 and unidirectional thyristor RT.The utility model circuit adds open circuit and current foldback circuit, when there is light fixture open circuit and over-current phenomenon avoidance in circuit, can interrupting power circuit in time, protection power source is not burned, circuit has abandoned complicated chip structure, use the combination of basic device, not only reduce cost of manufacture, and significantly increase the anti-interference of circuit, normally can work under the environment with electromagnetic interference, add the scope of application of circuit, therefore to have structure simple for circuit, strong interference immunity, cost of manufacture is low, the scope of application is wide and open a way, the advantage of overcurrent protection.
Description
Technical field
The utility model relates to a kind of converter circuitry of power, specifically the DC power converter circuit for lighting of simple, the strong interference immunity of a kind of structure.
Background technology
Illumination is most important power mode in daily life, direct current is because good stability, the advantage that power network fluctuation is little is widely used in the circuit of various lighting, because the driving voltage of various light fixture is different, therefore need when using direct current to use power supply changeover device to carry out collaborative work, existing DC power converter many employings chip controls, this frame mode cost is higher, easily break down and not easily debug maintenance, and existing power supply changeover device function singleness, when open circuit appears in lighting circuit, during over-current phenomenon avoidance, cannot open circuit in time, thus cause power supply to be burned.
Utility model content
The purpose of this utility model is to provide the DC power converter circuit for lighting that a kind of structure is simple, cost of manufacture is low, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of DC power converter circuit for lighting, comprise filter circuit, current foldback circuit and open loop protection circuit, described filter circuit comprises electric capacity C1, electric capacity C2 and resistance R1, described current foldback circuit comprises inductance L 1, a triode VT1 triode VT2, and described open loop protection circuit comprises discharge tube T, resistance R7, diode D3 and unidirectional thyristor RT;
One end contact resistance R1 respectively of described electric capacity C1, the collector electrode of triode VT1 and input voltage V1, the other end of electric capacity C1 connects the primary side N1 of electric capacity C2 and transformer W, the other end contact resistance R4 respectively of electric capacity C2, inductance L 3, electric capacity C3, the emitter of electric capacity C6 and triode VT2 ground connection, the other end contact resistance R2 of resistance R1, the negative pole of diode D2 and the anode of unidirectional thyristor RT, the base stage contact resistance R3 of triode VT1, the other end of resistance R3 connects inductance L 1, the other end connecting valve S1 of inductance L 1, the emitter of other end connecting triode VT1 of switch S 1 and the collector electrode of triode VT2, the other end of resistance R2 connects electric capacity C3, the positive pole of diode D1 and bidirectional thyristor RQ, the negative pole of diode D1 connects inductance L 3, the other end of the primary side N1 of the other end connection transformer W of inductance L 3, the positive pole of diode D2 connects inductance L 2, the other end of the other end contact resistance R4 of inductance L 2, the base stage of the other end connecting triode VT2 of bidirectional thyristor RQ, the pin contact resistance R5 of unidirectional thyristor RT, resistance R7, the other end of electric capacity C4 and electric capacity C6, the other end of the other end contact resistance R5 of electric capacity C4 and resistance R6, the other end of resistance R6 connects the negative pole of diode D3, the other end of the positive pole contact resistance R7 of diode D3 and resistance R8, the other end of resistance R8 connects 2 pins of discharge tube T, 1 pin of discharge tube T connects the positive pole of diode D2, the secondary end N2 of inductance C5 and transformer W, the other end of the secondary end N2 of the 3 pin connection transformer W of discharge tube T ground connection, the negative pole of diode D2 connects the other end and the output voltage V2 of electric capacity C5.
As preferred version of the present utility model: described discharge tube T is T90-A90XSMD type three end ceramic gas discharge tube.
As preferred version of the present utility model: the primary side N1 of described transformer W and the turn ratio of secondary end N2 are 105:3200.
As preferred version of the present utility model: described switch S 1 is normally closed temperature switch.
Compared with prior art, the beneficial effects of the utility model are: circuit effectively can not only complete the function of Power convert, and add open circuit and current foldback circuit, when there is light fixture open circuit and over-current phenomenon avoidance in circuit, can interrupting power circuit in time, protection power source is not burned, circuit has abandoned complicated chip structure, use the combination of basic device, not only reduce cost of manufacture, and significantly increase the anti-interference of circuit, normally can work under the environment with electromagnetic interference, add the scope of application of circuit, therefore to have structure simple for circuit, strong interference immunity, cost of manufacture is low, the scope of application is wide and open a way, the advantage of overcurrent protection.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the DC power converter circuit for lighting.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, a kind of DC power converter circuit for lighting, comprise filter circuit, current foldback circuit and open loop protection circuit, described filter circuit comprises electric capacity C1, electric capacity C2 and resistance R1, described current foldback circuit comprises inductance L 1, a triode VT1 triode VT2, and described open loop protection circuit comprises discharge tube T, resistance R7, diode D3 and unidirectional thyristor RT;
One end contact resistance R1 respectively of described electric capacity C1, the collector electrode of triode VT1 and input voltage V1, the other end of electric capacity C1 connects the primary side N1 of electric capacity C2 and transformer W, the other end contact resistance R4 respectively of electric capacity C2, inductance L 3, electric capacity C3, the emitter of electric capacity C6 and triode VT2 ground connection, the other end contact resistance R2 of resistance R1, the negative pole of diode D2 and the anode of unidirectional thyristor RT, the base stage contact resistance R3 of triode VT1, the other end of resistance R3 connects inductance L 1, the other end connecting valve S1 of inductance L 1, the emitter of other end connecting triode VT1 of switch S 1 and the collector electrode of triode VT2, the other end of resistance R2 connects electric capacity C3, the positive pole of diode D1 and bidirectional thyristor RQ, the negative pole of diode D1 connects inductance L 3, the other end of the primary side N1 of the other end connection transformer W of inductance L 3, the positive pole of diode D2 connects inductance L 2, the other end of the other end contact resistance R4 of inductance L 2, the base stage of the other end connecting triode VT2 of bidirectional thyristor RQ, the pin contact resistance R5 of unidirectional thyristor RT, resistance R7, the other end of electric capacity C4 and electric capacity C6, the other end of the other end contact resistance R5 of electric capacity C4 and resistance R6, the other end of resistance R6 connects the negative pole of diode D3, the other end of the positive pole contact resistance R7 of diode D3 and resistance R8, the other end of resistance R8 connects 2 pins of discharge tube T, 1 pin of discharge tube T connects the positive pole of diode D2, the secondary end N2 of inductance C5 and transformer W, the other end of the secondary end N2 of the 3 pin connection transformer W of discharge tube T ground connection, the negative pole of diode D2 connects the other end and the output voltage V2 of electric capacity C5.
Discharge tube T is T90-A90XSMD type three end ceramic gas discharge tube.
The primary side N1 of transformer W and the turn ratio of secondary end N2 are 105:3200.
Switch S 1 is normally closed temperature switch.
Operation principle of the present utility model is: when output is opened a way, discharge tube T starts electric discharge, discharge electric field is input to the control pole of unidirectional thyristor RT after diode D3 and resistance R6, unidirectional thyristor RT is made to obtain triggering signal and conducting, make oscillating circuit failure of oscillation, reach the object of protection, inductance L 3 provides the negative pressure of an about 10V to the negative electrode of unidirectional thyristor RT at ordinary times, when load open circuit, negative pressure raises suddenly, accelerate unidirectional thyristor RT conducting, the effect of diode D2 is the base stage ground connection simultaneously making triode VT2 when unidirectional thyristor RT conducting, accelerate triode VT2 to end, make protection fast and reliable.Because unidirectional thyristor RT controls pole at ordinary times without operating voltage, so avoid protection by mistake, enhance antijamming capability.Normally closed temperature switch S1 is used for overcurrent protection, and its working temperature is selected to be advisable at 65 ~ 70 degrees Celsius, and it is installed near triode VT1 or triode VT2.The open circuit when accessing that in the too heavy or course of work of load, part light fixture damages, overvoltage protection is inoperative, but triode VT1 and triode VT2 generates heat because of overcurrent.When temperature is elevated to the setting limit, S1 opens a way, and circuit quits work; protection power tube unlikely damage, does not discharge when discharge tube T is flat, when running into light fixture open circuit, transformer secondary output end N2 voltage raises suddenly; then discharge tube T starts electric discharge, protects power circuit and is not burnt.
Claims (4)
1., for a DC power converter circuit for lighting, comprise filter circuit, current foldback circuit and open loop protection circuit; It is characterized in that, described filter circuit comprises electric capacity C1, electric capacity C2 and resistance R1, described current foldback circuit comprises inductance L 1, a triode VT1 triode VT2, and described open loop protection circuit comprises discharge tube T, resistance R7, diode D3 and unidirectional thyristor RT;
One end contact resistance R1 respectively of described electric capacity C1, the collector electrode of triode VT1 and input voltage V1, the other end of electric capacity C1 connects the primary side N1 of electric capacity C2 and transformer W, the other end contact resistance R4 respectively of electric capacity C2, inductance L 3, electric capacity C3, the emitter of electric capacity C6 and triode VT2 ground connection, the other end contact resistance R2 of resistance R1, the negative pole of diode D2 and the anode of unidirectional thyristor RT, the base stage contact resistance R3 of triode VT1, the other end of resistance R3 connects inductance L 1, the other end connecting valve S1 of inductance L 1, the emitter of other end connecting triode VT1 of switch S 1 and the collector electrode of triode VT2, the other end of resistance R2 connects electric capacity C3, the positive pole of diode D1 and bidirectional thyristor RQ, the negative pole of diode D1 connects inductance L 3, the other end of the primary side N1 of the other end connection transformer W of inductance L 3, the positive pole of diode D2 connects inductance L 2, the other end of the other end contact resistance R4 of inductance L 2, the base stage of the other end connecting triode VT2 of bidirectional thyristor RQ, the pin contact resistance R5 of unidirectional thyristor RT, resistance R7, the other end of electric capacity C4 and electric capacity C6, the other end of the other end contact resistance R5 of electric capacity C4 and resistance R6, the other end of resistance R6 connects the negative pole of diode D3, the other end of the positive pole contact resistance R7 of diode D3 and resistance R8, the other end of resistance R8 connects 2 pins of discharge tube T, 1 pin of discharge tube T connects the positive pole of diode D2, the secondary end N2 of inductance C5 and transformer W, the other end of the secondary end N2 of the 3 pin connection transformer W of discharge tube T ground connection, the negative pole of diode D2 connects the other end and the output voltage V2 of electric capacity C5.
2. a kind of DC power converter circuit for lighting according to claim 1, is characterized in that, described discharge tube T is T90-A90XSMD type three end ceramic gas discharge tube.
3. a kind of DC power converter circuit for lighting according to claim 1, is characterized in that, the primary side N1 of described transformer W and the turn ratio of secondary end N2 are 105:3200.
4. a kind of DC power converter circuit for lighting according to claim 1, is characterized in that, described switch S 1 is normally closed temperature switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420858820.XU CN204335082U (en) | 2014-12-30 | 2014-12-30 | A kind of DC power converter circuit for lighting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420858820.XU CN204335082U (en) | 2014-12-30 | 2014-12-30 | A kind of DC power converter circuit for lighting |
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| Publication Number | Publication Date |
|---|---|
| CN204335082U true CN204335082U (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420858820.XU Active CN204335082U (en) | 2014-12-30 | 2014-12-30 | A kind of DC power converter circuit for lighting |
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| CN (1) | CN204335082U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287609A (en) * | 2016-10-20 | 2017-01-04 | 桂林大创科技有限公司 | A kind of LED illumination lamp |
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2014
- 2014-12-30 CN CN201420858820.XU patent/CN204335082U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287609A (en) * | 2016-10-20 | 2017-01-04 | 桂林大创科技有限公司 | A kind of LED illumination lamp |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201512 Building 1, no.469 sanbang Road, Songjiang District, Shanghai Patentee after: Shanghai Juntao Technology Co.,Ltd. Address before: 201512 Building 1, no.469 sanbang Road, Songjiang District, Shanghai Patentee before: SHANGHAI JUNTAO POWER EQUIPMENT Co.,Ltd. |