CN104218551A - Lamp surge protection circuit and lamp - Google Patents
Lamp surge protection circuit and lamp Download PDFInfo
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- CN104218551A CN104218551A CN201310209771.7A CN201310209771A CN104218551A CN 104218551 A CN104218551 A CN 104218551A CN 201310209771 A CN201310209771 A CN 201310209771A CN 104218551 A CN104218551 A CN 104218551A
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention proposes a lamp surge protection circuit connected between a power supply and a lamp driving circuit. The lamp surge protection circuit comprises a detection unit, a control unit, a switch and a series absorption unit, wherein the detection unit is connected with the power supply; the control unit is connected with the detection unit; the switch comprises an input end and an output end, the input end of the switch is connected with the input end of the detection unit, and the output end of the switch is connected with the lamp driving circuit; the series absorption unit is connected between the power supply and the lamp driving circuit; when the detection unit detects the circuit is at a starting moment, the control unit controls the switch to be switched off, the series absorption unit absorbs surge current at the starting moment; and when the detection unit detects that the current of circuit keeps stably, the control unit controls the switch to be switched on, and the series absorption unit stops working. The invention also proposes a lamp. With the adoption of the lamp surge protection circuit, the surge current can be absorbed at the starting moment of the circuit, and the damage of the surge current to the post-stage lamp driving circuit is prevented.
Description
Technical field
The present invention relates to a kind of protective circuit, relate in particular to a kind of light fixture surge protection circuit and light fixture.
Background technology
In prior art, light fixture input circuit unlatching moment surge current is larger, easily post-stage drive circuit is caused to damage or affect to drive useful life.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiency that above-mentioned prior art exists, and proposes a kind of light fixture surge protection circuit and light fixture, can solve circuit and open moment surge current and can cause to late-class circuit the problem of damage.
For solving the problems of the technologies described above, the present invention proposes a kind of light fixture surge protection circuit, it is connected between power supply and lamp driving circuit, it comprises: detecting unit, it comprises input, the first output and the second output, the input of detecting unit connects the positive pole of power supply, and the first output of detecting unit connects the negative pole of power supply; Control unit, it comprises first input end, the second input and output, the first input end of control unit connects the second output of detecting unit, and the second input of control unit connects the input of detecting unit, and the output of control unit connects the first output of detecting unit; Switch, it comprises input and output, and the input of switch connects the input of detecting unit, and the output of switch connects lamp driving circuit; And series connection absorptive unit, it comprises input and output, the input of the input connecting valve of series connection absorptive unit, the output of the output connecting valve of series connection absorptive unit; Wherein, when detecting unit detects that circuit is in the time starting moment, control unit control switch disconnects, series connection absorptive unit absorbs the surge current of opening moment, when detecting unit detects after the electric current held stationary of circuit, control unit control switch closure, series connection absorptive unit quits work.
Preferably, detecting unit comprises the first electric capacity, the second electric capacity and the first resistance, the first electric capacity is connected between the input and the first output of detecting unit, one end of the second electric capacity connects the input of detecting unit, the other end of the second electric capacity connects the second output of detecting unit, one end of the first resistance connects the second output of detecting unit, and the other end of the first resistance connects the first output of detecting unit.
Preferably, the resistance of the first resistance R 1 arranges according to supply voltage.
Preferably, control unit comprises integrated circuit, the 3rd electric capacity, the second resistance, switching tube, the hot-wire coil of diode and relay, integrated circuit comprises first input end, the second input, the 3rd input, the 4th input, the first output, the second output and the 3rd output, switching tube comprises control end, input and output, the first input end of the first input end of integrated circuit and the second input connection control unit, the 3rd input of integrated circuit and the second input of four-input terminal connection control unit, the output of the first output connection control unit of integrated circuit, the second output of integrated circuit connects the output to control unit after the 3rd electric capacity, the 3rd output of integrated circuit connects the control end of connecting valve pipe after the second resistance, the first input end of the negative electrode connection control unit of diode, the input of the anodic bonding switching tube of diode, the output of the output connection control unit of switching tube, the input of one end connection control unit of the hot-wire coil of relay, the input of other end connecting valve pipe.
Preferably, switching tube is triode, the control end that the base stage of triode is switching tube, and the current collection of triode is the input of switching tube very, and the transmitting of triode is the output of switching tube very.
Preferably, switching tube is metal-oxide-semiconductor, the control end that the grid of metal-oxide-semiconductor is switching tube, the input that the source electrode of metal-oxide-semiconductor is switching tube, the output that the drain electrode of metal-oxide-semiconductor is switching tube.
Preferably, integrated circuit is chip NE555, the first input end that the threshold value end of chip NE555 is integrated circuit, the trigger end of chip NE555 is the second input of integrated circuit, the reset terminal of chip NE555 is the 3rd input of integrated circuit, the power end of chip NE555 is the four-input terminal of integrated circuit, the earth terminal of chip NE555 is the first output of integrated circuit, the second output that the control voltage end of chip NE555 is integrated circuit, the 3rd output that the output of chip NE555 is integrated circuit.
Preferably, series connection absorptive unit comprises the first thermistor and the second thermistor, and the first thermistor and the second thermistor are connected between the input and output of series connection absorptive unit successively.
The present invention also proposes a kind of light fixture, comprises light fixture surge protection circuit as above.
Compared with prior art, light fixture surge protection circuit of the present invention and light fixture, the series connection absorptive unit consisting of thermistor, the moment that can open at circuit, absorbs surge current, the destruction that prevents the lamp driving circuit of surge current to rear class.
Brief description of the drawings
Fig. 1 is the circuit structure diagram of light fixture surge protection circuit of the present invention.
Description of reference numerals is as follows: hot-wire coil K series connection absorptive unit 3 first thermistor RT1 second thermistor RT2 K switch-1 of detecting unit 1 first capacitor C 1 second capacitor C 2 first resistance R 1 control unit 2 integrated circuit U1 the 3rd capacitor C 3 second resistance R 2 triode Q1 diode D1 relays.
Embodiment
In order to further illustrate principle of the present invention and structure, existing by reference to the accompanying drawings to a preferred embodiment of the present invention will be described in detail.
Refer to Fig. 1, a kind of light fixture surge protection circuit, it is connected between power supply and lamp driving circuit, and it comprises: detecting unit 1, control unit 2, K switch-1 and series connection absorptive unit 3.
Detecting unit 1 comprises input, the first output and the second output, and the input of detecting unit 1 connects the positive pole of power supply, and the first output of detecting unit 1 connects the negative pole of power supply.Control unit 2 comprises first input end, the second input and output, the first input end of control unit 2 connects the second output of detecting unit 1, the second input of control unit 2 connects the input of detecting unit 1, and the output of control unit 2 connects the first output of detecting unit 1.K switch-1 comprises input and output, and the input of K switch-1 connects the input of detecting unit 1, and the output of K switch-1 connects lamp driving circuit.Series connection absorptive unit 3 comprises input and output, the input of the input connecting valve K-1 of series connection absorptive unit 3, the output of the output connecting valve K-1 of series connection absorptive unit 3.Wherein, when detecting unit 1 detects that circuit is in the time starting moment, control unit 2 control switch K-1 disconnect, series connection absorptive unit 3 absorbs the surge current of opening moment, when detecting unit 1 detects after the electric current held stationary of circuit, control unit 2 control switch K-1 closures, series connection absorptive unit 3 quits work.
Detecting unit 1 comprises the first capacitor C 1, the second capacitor C 2 and the first resistance R 1.The first capacitor C 1 is connected between the input and the first output of detecting unit 1, one end of the second capacitor C 2 connects the input of detecting unit 1, the other end of the second capacitor C 2 connects the second output of detecting unit 1, one end of the first resistance R 1 connects the second output of detecting unit 1, and the other end of the first resistance R 1 connects the first output of detecting unit 1.
In the present embodiment, the resistance of the first resistance R 1 arranges according to described supply voltage, and in the time of the second capacitor C 2 short circuit, the dividing potential drop at its two ends is less than 1/3rd of supply voltage.
Control unit 2 comprises the hot-wire coil K of integrated circuit U1, the 3rd capacitor C 3, the second resistance R 2, triode Q1, diode D1 and relay.Integrated circuit U1 comprises first input end, the second input, the 3rd input, the 4th input, the first output, the second output and the 3rd output, the first input end of the first input end of integrated circuit U1 and the second input connection control unit 2, the 3rd input of integrated circuit U1 and the second input of four-input terminal connection control unit 2, the output of the first output connection control unit 2 of integrated circuit U1, the second output of integrated circuit U1 connects the output to control unit 2 after the 3rd capacitor C 3, the 3rd output of integrated circuit U1 connects the base stage of the rear connecting triode Q1 of the second resistance R 2, the first input end of the negative electrode connection control unit 2 of diode D1, the collector electrode of the anodic bonding triode Q1 of diode D1, the output of the emitter connection control unit 2 of triode Q1, the input of one end connection control unit 2 of the hot-wire coil K of relay, the collector electrode of other end connecting triode Q1.
In the present embodiment, also can replace triode with metal-oxide-semiconductor.Therefore, the 3rd output of integrated circuit U1 connects the grid of the rear connecting triode Q1 of the second resistance R 2, the first input end of the negative electrode connection control unit 2 of diode D1, the source electrode of the anodic bonding triode Q1 of diode D1, the output of the drain electrode connection control unit 2 of triode Q1, the input of one end connection control unit 2 of the hot-wire coil K of relay, the source electrode of other end connecting triode Q1.
In the present embodiment, the model of integrated circuit U1 is chip NE555.Therefore, the threshold value end of chip NE555 is the first input end of integrated circuit U1, the trigger end of chip NE555 is the second input of integrated circuit U1, the reset terminal of chip NE555 is the 3rd input of integrated circuit U1, the power end of chip NE555 is the four-input terminal of integrated circuit U1, the earth terminal of chip NE555 is the first output of integrated circuit U1, the control voltage end of chip NE555 is the second output of integrated circuit U1, and the output of chip NE555 is the 3rd output of integrated circuit U1.According to the characteristic of chip NE555, it is supply voltage three that the trigger end of integrated circuit U1 receives the output voltage of the second output of detecting unit 1/for the moment, and the output output high level of integrated circuit U1, thus make triode Q1 conducting.
Series connection absorptive unit 3 comprises the first thermistor RT1 and the second thermistor RT2.The first thermistor RT1 and the second thermistor RT2 are connected between the input and output of series connection absorptive unit 3 successively.
The present invention also proposes a kind of light fixture, comprises light fixture surge protection circuit as above.
Describe operation principle of the present invention in detail below in conjunction with Fig. 1.
DC power supply is input voltage, by the first capacitor C 1 filtering, gives chip NE555 and relay power supply.The moment of opening in power supply input charges to the second capacitor C 2 by the first resistance R 1, now the first capacitor C 1 is equivalent to short circuit, make the current potential of trigger end of chip NE555 higher than 1/3rd of supply voltage, now the output of chip NE555 is handed over output low level, triode Q1 disconnects, relay electric-loss is not worked, and circuit is powered for light fixture drives by the series connection absorptive unit 3 of the first thermistor RT1 and the second thermistor RT2 composition.When the second capacitor C 2 is full of after electricity, the second capacitor C 2 is equivalent to short circuit, make the voltage of trigger end of NE555 lower than 1/3rd of supply voltage, the now output of chip NE555 output high level, triode Q1 conducting, relay obtains electric work, K switch-1 adhesive, for rear class drives power supply, so sponge at the surge current of opening moment, prevent rear class to damage.
Compared with prior art, light fixture surge protection circuit of the present invention and light fixture, the series connection absorptive unit consisting of thermistor, the moment that can open at circuit, absorbs surge current, the destruction that prevents the lamp driving circuit of surge current to rear class.
The foregoing is only better possible embodiments of the present invention, not limit the scope of the invention.The equivalent structure that all utilizations specification of the present invention and accompanying drawing content have been done changes, and is all included in protection scope of the present invention.
Claims (9)
1. a light fixture surge protection circuit, it is connected between power supply and lamp driving circuit, it is characterized in that, and it comprises:
Detecting unit, it comprises input, the first output and the second output, and the input of described detecting unit connects the positive pole of described power supply, and the first output of described detecting unit connects the negative pole of described power supply;
Control unit, it comprises first input end, the second input and output, the first input end of described control unit connects the second output of described detecting unit, the second input of described control unit connects the input of described detecting unit, and the output of described control unit connects the first output of described detecting unit;
Switch, it comprises input and output, and the input of described switch connects the input of described detecting unit, and the output of described switch connects described lamp driving circuit; And
Series connection absorptive unit, it comprises input and output, and the input of described series connection absorptive unit connects the input of described switch, and the output of described series connection absorptive unit connects the output of described switch;
Wherein, when described detecting unit detects that circuit is in the time starting moment, described in described control unit control, switch disconnects, described series connection absorptive unit absorbs the surge current of opening moment, when described detecting unit detects after the electric current held stationary of circuit, switch closure described in described control unit control, described series connection absorptive unit quits work.
2. light fixture surge protection circuit as claimed in claim 1; it is characterized in that; described detecting unit comprises the first electric capacity, the second electric capacity and the first resistance; described the first electric capacity is connected between the input and the first output of described detecting unit; one end of described the second electric capacity connects the input of described detecting unit; the other end of described the second electric capacity connects the second output of described detecting unit; one end of described the first resistance connects the second output of described detecting unit, and the other end of described the first resistance connects the first output of described detecting unit.
3. light fixture overheating protection circuit as claimed in claim 2, is characterized in that, the resistance of described the first resistance R 1 arranges according to described supply voltage.
4. light fixture surge protection circuit as claimed in claim 1, it is characterized in that, described control unit comprises integrated circuit, the 3rd electric capacity, the second resistance, switching tube, the hot-wire coil of diode and relay, described integrated circuit comprises first input end, the second input, the 3rd input, the 4th input, the first output, the second output and the 3rd output, described switching tube comprises control end, input and output, the first input end of described integrated circuit and the second input connect the first input end of described control unit, the 3rd input of described integrated circuit and four-input terminal connect the second input of described control unit, the first output of described integrated circuit connects the output of described control unit, the second output of described integrated circuit connects the output to described control unit after described the 3rd electric capacity, the 3rd output of described integrated circuit connects the control end that connects described switching tube after described the second resistance, the negative electrode of described diode connects the first input end of described control unit, the input of switching tube described in the anodic bonding of described diode, the output of described switching tube connects the output of described control unit, one end of the hot-wire coil of described relay connects the input of described control unit, the other end connects the input of described switching tube.
5. light fixture surge protection circuit as claimed in claim 4; it is characterized in that; described switching tube is triode; the base stage of described triode is the control end of described switching tube; the input of the very described switching tube of the current collection of described triode, the output of the very described switching tube of the transmitting of described triode.
6. light fixture surge protection circuit as claimed in claim 4; it is characterized in that, described switching tube is metal-oxide-semiconductor, the control end that the grid of described metal-oxide-semiconductor is described switching tube; the source electrode of described metal-oxide-semiconductor is the input of described switching tube, the output that the drain electrode of described metal-oxide-semiconductor is described switching tube.
7. light fixture surge protection circuit as claimed in claim 4, it is characterized in that, described integrated circuit is chip NE555, the first input end that the threshold value end of described chip NE555 is described integrated circuit, the trigger end of described chip NE555 is the second input of described integrated circuit, the reset terminal of described chip NE555 is the 3rd input of described integrated circuit, the power end of described chip NE555 is the four-input terminal of described integrated circuit, the earth terminal of described chip NE555 is the first output of described integrated circuit, the second output that the control voltage end of described chip NE555 is described integrated circuit, the output of described chip NE555 is the 3rd output of described integrated circuit.
8. light fixture surge protection circuit as claimed in claim 1; it is characterized in that; described series connection absorptive unit comprises the first thermistor and the second thermistor, and described the first thermistor and the second thermistor are connected between the input and output of described series connection absorptive unit successively.
9. a light fixture, is characterized in that, comprises the light fixture surge protection circuit as described in claim 1 to 8 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310209771.7A CN104218551B (en) | 2013-05-30 | 2013-05-30 | Light fixture surge protection circuit and light fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310209771.7A CN104218551B (en) | 2013-05-30 | 2013-05-30 | Light fixture surge protection circuit and light fixture |
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| Publication Number | Publication Date |
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| CN104218551A true CN104218551A (en) | 2014-12-17 |
| CN104218551B CN104218551B (en) | 2017-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310209771.7A Active CN104218551B (en) | 2013-05-30 | 2013-05-30 | Light fixture surge protection circuit and light fixture |
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| Country | Link |
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| CN (1) | CN104218551B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449659A (en) * | 2015-12-30 | 2016-03-30 | 张旭 | Short-wave radio station high-altitude nuclear electromagnetic pulse protection device |
| CN106714389A (en) * | 2017-02-16 | 2017-05-24 | 深圳市晟碟半导体有限公司 | LED (Light Emitting Diode) driving device and surge protection circuit and surge protection method of LED driving device |
| CN110966155A (en) * | 2019-12-24 | 2020-04-07 | 赵华勇 | Double-purpose straight-flow pump |
| CN112469176A (en) * | 2020-12-21 | 2021-03-09 | 珠海格力电器股份有限公司 | Control circuit and method for preventing false lighting of indicator lamp, storage medium and apparatus |
| CN113079611A (en) * | 2021-04-20 | 2021-07-06 | 北京克什布科技发展有限公司 | Anti-lightning and anti-misconnection tower crane lamp |
| CN114094558A (en) * | 2021-11-30 | 2022-02-25 | 海信（广东）空调有限公司 | Surge protection circuit, control method thereof, driving device and air conditioner |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449659A (en) * | 2015-12-30 | 2016-03-30 | 张旭 | Short-wave radio station high-altitude nuclear electromagnetic pulse protection device |
| CN105449659B (en) * | 2015-12-30 | 2019-03-08 | 张旭 | Short-wave radio set upper low pressure trough protective device |
| CN106714389A (en) * | 2017-02-16 | 2017-05-24 | 深圳市晟碟半导体有限公司 | LED (Light Emitting Diode) driving device and surge protection circuit and surge protection method of LED driving device |
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| CN110966155A (en) * | 2019-12-24 | 2020-04-07 | 赵华勇 | Double-purpose straight-flow pump |
| CN112469176A (en) * | 2020-12-21 | 2021-03-09 | 珠海格力电器股份有限公司 | Control circuit and method for preventing false lighting of indicator lamp, storage medium and apparatus |
| CN112469176B (en) * | 2020-12-21 | 2022-04-22 | 珠海格力电器股份有限公司 | Control circuit and method for preventing false lighting of indicator lamp, storage medium and apparatus |
| CN113079611A (en) * | 2021-04-20 | 2021-07-06 | 北京克什布科技发展有限公司 | Anti-lightning and anti-misconnection tower crane lamp |
| CN113079611B (en) * | 2021-04-20 | 2022-12-16 | 北京克什布科技发展有限公司 | Anti-lightning and anti-misconnection tower crane lamp |
| CN114094558A (en) * | 2021-11-30 | 2022-02-25 | 海信（广东）空调有限公司 | Surge protection circuit, control method thereof, driving device and air conditioner |
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