CN104218551B - Light fixture surge protection circuit and light fixture - Google Patents
Light fixture surge protection circuit and light fixture Download PDFInfo
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- CN104218551B CN104218551B CN201310209771.7A CN201310209771A CN104218551B CN 104218551 B CN104218551 B CN 104218551B CN 201310209771 A CN201310209771 A CN 201310209771A CN 104218551 B CN104218551 B CN 104218551B
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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
Abstract
The present invention proposes a kind of light fixture surge protection circuit, and it is connected between power supply and lamp driving circuit, and it includes：Detection unit, it connects power supply；Control unit, its connecting detection unit；Switch, it includes input and output end, the input of the input connecting detection unit of switch, the output end connection lamp driving circuit of switch；Series connection absorptive unit, it is connected between power supply and lamp driving circuit；Wherein, when detection unit detects that circuit is starting moment, control unit controlling switch disconnects, absorptive unit of connecting absorbs the surge current for opening moment, after detection unit detects the electric current held stationary of circuit, control unit controlling switch closure, series connection absorptive unit is stopped.The present invention also proposes a kind of light fixture.The moment that the present invention can open in circuit, surge current is absorbed, prevents destruction of the surge current to the lamp driving circuit of rear class.
Description
Technical field
The present invention relates to a kind of protection circuit, more particularly to a kind of light fixture surge protection circuit and light fixture.
Background technology
In the prior art, light fixture input circuit unlatching moment surge current is larger, easily post-stage drive circuit is caused to damage
Bad or influence driving service life.
The content of the invention
The technical problem to be solved in the present invention is to overcome above-mentioned the shortcomings of the prior art, and proposes a kind of light fixture wave
Protection circuit and light fixture are gushed, can solve the problem that circuit opens the problem of moment surge current can cause damage to late-class circuit.
In order to solve the above technical problems, the present invention proposes a kind of light fixture surge protection circuit, it is connected to power supply and lamp
Between having drive circuit, it includes：Detection unit, it includes input, the first output end and the second output end, detection unit
Input connection power supply positive pole, detection unit the first output end connection power supply negative pole；Control unit, it includes first
Input, the second input and output end, the second output end of the first input end connecting detection unit of control unit, control
The input of second input connecting detection unit of unit, the first output of the output end connecting detection unit of control unit
End；Switch, it includes input and output end, the input of the input connecting detection unit of switch, the output end of switch
Connect lamp driving circuit；And series connection absorptive unit, it includes input and output end, the input for absorptive unit of connecting
The input of connecting valve, the output end of the output end connecting valve for absorptive unit of connecting；Wherein, when detection unit detects electricity
When starting moment, control unit controlling switch disconnects on road, and series connection absorptive unit absorbs the surge current for opening moment, works as detection
After unit detects the electric current held stationary of circuit, control unit controlling switch closure, series connection absorptive unit is stopped.
Preferably, detection unit includes the first electric capacity, the second electric capacity and first resistor, and the first capacitance connection is single in detection
Member input and the first output end between, the input of one end connecting detection unit of the second electric capacity, the second electric capacity it is another
Second output end of one end connecting detection unit, the second output end of one end connecting detection unit of first resistor, first resistor
Other end connecting detection unit the first output end.
Preferably, first resistor R1 resistance is configured according to supply voltage.
Preferably, control unit includes integrated circuit, the 3rd electric capacity, second resistance, switching tube, diode and relay
Hot-wire coil, integrated circuit include first input end, the second input, the 3rd input, the 4th input, the first output end,
Second output end and the 3rd output end, switching tube include control terminal, input and output end, the first input of integrated circuit
End and the first input end of the second input connection control unit, the 3rd input of integrated circuit and the 4th input connect
Connect the second input of control unit, the output end of the first output end connection control unit of integrated circuit, the of integrated circuit
Two output ends connect the 3rd electric capacity after to control unit output end, integrated circuit the 3rd output end connection second resistance after connect
Connect the control terminal of switching tube, the first input end of the negative electrode connection control unit of diode, the anode connecting valve pipe of diode
Input, the output end of the output end connection control unit of switching tube, one end connection control of the hot-wire coil of relay is single
The input of member, the input of other end connecting valve pipe.
Preferably, switching tube is triode, and the base stage of triode is the control terminal of switching tube, and the current collection of triode is extremely opened
Close the input of pipe, the output end of the transmitting extremely switching tube of triode.
Preferably, switching tube is metal-oxide-semiconductor, and the grid of metal-oxide-semiconductor is the control terminal of switching tube, and the source electrode of metal-oxide-semiconductor is switching tube
Input, metal-oxide-semiconductor drain electrode for switching tube output end.
Preferably, integrated circuit is chip NE555, and chip NE555 threshold value end is the first input end of integrated circuit, core
Piece NE555 triggering end is the second input of integrated circuit, and chip NE555 reset terminal inputs for the 3rd of integrated circuit
End, chip NE555 power end are the 4th input of integrated circuit, and chip NE555 earth terminal is the first of integrated circuit
Output end, chip NE555 control voltage end are the second output end of integrated circuit, and chip NE555 output end is integrated electricity
3rd output end on road.
Preferably, series connection absorptive unit includes the first thermistor and the second thermistor, the first thermistor and
Second thermistor is sequentially connected in series between the input of series connection absorptive unit and output end.
The present invention also proposes a kind of light fixture, including light fixture surge protection circuit as described above.
Compared with prior art, light fixture surge protection circuit and light fixture of the invention, the string being made up of thermistor
Join absorptive unit, the moment that can be opened in circuit, absorb surge current, prevent lamp driving circuit of the surge current to rear class
Destruction.
Brief description of the drawings
Fig. 1 is the circuit structure diagram of the light fixture surge protection circuit of the present invention.
Description of reference numerals is as follows：Electric capacity C1 the second electric capacity C2 first resistor R1 control units 2 of detection unit 1 first
The hot-wire coil K series connection of the electric capacity C3 second resistance R2 triode Q1 diode D1 relays of integrated circuit U1 the 3rd absorbs
The second thermistors of the thermistor RT1 RT2 of unit 3 first switchs K-1.
Embodiment
In order to further illustrate the principle and structure of the present invention, the preferred embodiments of the present invention are carried out in conjunction with accompanying drawing detailed
Describe in detail bright.
Referring to Fig. 1, a kind of light fixture surge protection circuit, it is connected between power supply and lamp driving circuit, and it is wrapped
Include：Detection unit 1, control unit 2, switch K-1 and series connection absorptive unit 3.
Detection unit 1 includes input, the first output end and the second output end, the input connection electricity of detection unit 1
The positive pole in source, the negative pole of the first output end connection power supply of detection unit 1.Control unit 2 includes first input end, the second input
End and output end, the second output end of the first input end connecting detection unit 1 of control unit 2, the second of control unit 2 are defeated
Enter to hold the input of connecting detection unit 1, the first output end of the output end connecting detection unit 1 of control unit 2.Switch K-1
Including input and output end, the input of K-1 input connecting detection unit 1 is switched, switchs K-1 output end connection
Lamp driving circuit.Series connection absorptive unit 3 includes input and output end, the input connecting valve for absorptive unit 3 of connecting
K-1 input, the output end connecting valve K-1 for absorptive unit 3 of connecting output end.Wherein, when detection unit 1 detects electricity
When starting moment, the controlling switch K-1 of control unit 2 disconnects on road, and series connection absorptive unit 3 absorbs the surge current for opening moment,
After detection unit 1 detects the electric current held stationary of circuit, the controlling switch K-1 of control unit 2 closures, absorptive unit 3 of connecting
It is stopped.
Detection unit 1 includes the first electric capacity C1, the second electric capacity C2 and first resistor R1.First electric capacity C1 is connected to detection
Between the input of unit 1 and the first output end, the input of the second electric capacity C2 one end connecting detection unit 1, the second electricity
Hold the second output end of C2 other end connecting detection unit 1, the second output of first resistor R1 one end connecting detection unit 1
End, the first output end of first resistor R1 other end connecting detection unit 1.
In the present embodiment, first resistor R1 resistance is configured according to the supply voltage, in the second electric capacity C2 short circuits
When, the partial pressure at its both ends is less than 1/3rd of supply voltage.
Control unit 2 include integrated circuit U1, the 3rd electric capacity C3, second resistance R2, triode Q1, diode D1 and after
The hot-wire coil K of electrical equipment.Integrated circuit U1 includes first input end, the second input, the 3rd input, the 4th input, first
Output end, the second output end and the 3rd output end, integrated circuit U1 first input end and the connection control of the second input
The first input end of unit 2, the second input of integrated circuit U1 the 3rd input and the 4th input connection control unit 2
End, the output end of integrated circuit U1 the first output end connection control unit 2, integrated circuit U1 the second output end connection the 3rd
After electric capacity C3 connecting triode after second resistance R2 is connected to the output end of control unit 2, integrated circuit U1 the 3rd output end
Q1 base stage, the first input end of diode D1 negative electrode connection control unit 2, diode D1 anode connecting triode Q1's
Colelctor electrode, the output end of triode Q1 emitter stage connection control unit 2, the hot-wire coil K of relay one end connection control
The input of unit 2, other end connecting triode Q1 colelctor electrode.
In the present embodiment, triode can also be replaced with metal-oxide-semiconductor.Therefore, integrated circuit U1 the 3rd output end connection
Connecting triode Q1 grid after second resistance R2, the first input end of diode D1 negative electrode connection control unit 2, diode
D1 anode connecting triode Q1 source electrode, the output end of triode Q1 drain electrode connection control unit 2, the live wire of relay
Enclose the input of K one end connection control unit 2, other end connecting triode Q1 source electrode.
In the present embodiment, integrated circuit U1 model chip NE555.Therefore, chip NE555 threshold value end is integrated electricity
Road U1 first input end, chip NE555 triggering end are integrated circuit U1 the second input, chip NE555 reset terminal
For integrated circuit U1 the 3rd input, chip NE555 power end is integrated circuit U1 the 4th input, chip NE555
Earth terminal be integrated circuit U1 the first output end, the second output that chip NE555 control voltage end is integrated circuit U1
End, chip NE555 output end are integrated circuit U1 the 3rd output end.According to chip NE555 characteristic, integrated circuit U1's
When the output voltage that triggering end receives the second output end of detection unit 1 is 1/3rd of supply voltage, integrated circuit U1
Output end output high level so that triode Q1 turn on.
Series connection absorptive unit 3 includes the first thermistor RT1 and the second thermistor RT2.First thermistor RT1 with
And second thermistor RT2 be sequentially connected in series series connection absorptive unit 3 input and output end between.
The present invention also proposes a kind of light fixture, including light fixture surge protection circuit as described above.
Describe the operation principle of the present invention in detail with reference to Fig. 1.
Dc source is input voltage, is filtered by the first electric capacity C1, is powered to chip NE555 and relay.In power supply
The moment for inputting unlatching is charged by first resistor R1 to the second electric capacity C2, and now the first electric capacity C1 is equivalent to short circuit so that core
The current potential of piece NE555 triggering end is higher than 1/3rd of supply voltage, and now chip NE555 output end, which is handed over, exports low electricity
Flat, triode Q1 is disconnected, and relay electric-loss does not work, and circuit is made up of the first thermistor RT1 and the second thermistor RT2
Series connection absorptive unit 3 for light fixture driving power supply.After the second electric capacity C2 is fully charged, the second electric capacity C2 is equivalent to short circuit so that
The voltage of NE555 triggering end is less than 1/3rd of supply voltage, now chip NE555 output end output high level, and three
Pole pipe Q1 is turned on, and relay obtains electric work, switchs K-1 adhesives, for rear class driving power supply, is so sponged and is being opened the wave of moment
Electric current is gushed, prevents from damaging rear class.
Compared with prior art, light fixture surge protection circuit and light fixture of the invention, the string being made up of thermistor
Join absorptive unit, the moment that can be opened in circuit, absorb surge current, prevent lamp driving circuit of the surge current to rear class
Destruction.
The preferable possible embodiments of the present invention are the foregoing is only, are not limited the scope of the invention.It is all to use this
Equivalent structure change made by description of the invention and accompanying drawing content, is all contained in protection scope of the present invention.
Claims (8)
1. a kind of light fixture surge protection circuit, it is connected between power supply and lamp driving circuit, it is characterised in that it is wrapped
Include：
Detection unit, it includes input, the first output end and the second output end, the input connection institute of the detection unit
The positive pole of power supply is stated, the first output end of the detection unit connects the negative pole of the power supply；
Control unit, it includes first input end, the second input and output end, and the first input end of described control unit connects
The second output end of the detection unit is connect, the second input of described control unit connects the input of the detection unit,
The output end of described control unit connects the first output end of the detection unit；
Switch, it includes input and output end, and the input of the switch connects the input of the detection unit, described
The output end of switch connects the lamp driving circuit；And
Series connection absorptive unit, it includes input and output end, and the input of the series connection absorptive unit connects the switch
Input, the output end of the series connection absorptive unit connects the output end of the switch；
Wherein, when the detection unit detects that circuit is starting moment, switched off described in described control unit control, institute
State series connection absorptive unit and absorb the surge current for opening moment, when the detection unit detects the electric current held stationary of circuit
Afterwards, the described control unit control switch closure, the series connection absorptive unit are stopped；
The detection unit includes the first electric capacity, the second electric capacity and first resistor, and first capacitance connection is in the detection
Between the input of unit and the first output end, one end of second electric capacity connects the input of the detection unit, institute
The other end for stating the second electric capacity connects the second output end of the detection unit, and one end of the first resistor connects the detection
Second output end of unit, the other end of the first resistor connect the first output end of the detection unit；
The dc source is input voltage, when the detection unit detects that circuit is starting moment, passes through described first
Resistance charges to second electric capacity, and first electric capacity is equivalent to short circuit；After second electric capacity is fully charged, described second
Electric capacity is not turned on.
2. light fixture surge protection circuit as claimed in claim 1, it is characterised in that the resistance of the first resistor R1 is according to institute
Supply voltage is stated to be configured.
3. light fixture surge protection circuit as claimed in claim 1, it is characterised in that described control unit include integrated circuit,
3rd electric capacity, second resistance, switching tube, the hot-wire coil of diode and relay, the integrated circuit include the first input
End, the second input, the 3rd input, the 4th input, the first output end, the second output end and the 3rd output end, it is described to open
Closing pipe includes control terminal, input and output end, the first input end of the integrated circuit and the second input connection institute
State the first input end of control unit, the 3rd input of the integrated circuit and the 4th input connection described control unit
The second input, the integrated circuit the first output end connection described control unit output end, the integrated circuit
Connect after second output end connection the 3rd electric capacity to the output end of described control unit, the 3rd output end of the integrated circuit
Connect the control terminal that the switching tube is connected after the second resistance, the first of the negative electrode connection described control unit of the diode
Input, the anode of the diode connect the input of the switching tube, and the output end of the switching tube connects the control
The output end of unit, the input of one end connection described control unit of the hot-wire coil of the relay, other end connection institute
State the input of switching tube.
4. light fixture surge protection circuit as claimed in claim 3, it is characterised in that the switching tube is triode, described three
The base stage of pole pipe be the switching tube control terminal, the input of the extremely described switching tube of current collection of the triode, described three
The output end of the extremely described switching tube of transmitting of pole pipe.
5. light fixture surge protection circuit as claimed in claim 3, it is characterised in that the switching tube is metal-oxide-semiconductor, the MOS
The grid of pipe is the control terminal of the switching tube, and the source electrode of the metal-oxide-semiconductor is the input of the switching tube, the metal-oxide-semiconductor
Drain as the output end of the switching tube.
6. light fixture surge protection circuit as claimed in claim 3, it is characterised in that the integrated circuit is chip NE555, institute
The threshold value end for stating chip NE555 is the first input end of the integrated circuit, and the triggering end of the chip NE555 is described integrated
Second input of circuit, the reset terminal of the chip NE555 are the 3rd input of the integrated circuit, the chip
NE555 power end is the 4th input of the integrated circuit, and the earth terminal of the chip NE555 is the integrated circuit
First output end, the control voltage end of the chip NE555 are the second output end of the integrated circuit, the chip NE555
Output end be the integrated circuit the 3rd output end.
7. light fixture surge protection circuit as claimed in claim 1, it is characterised in that the series connection absorptive unit includes the first heat
Quick resistance and the second thermistor, first thermistor and the second thermistor are sequentially connected in series to be absorbed in the series connection
Between the input and output end of unit.
8. a kind of light fixture, it is characterised in that including the light fixture surge protection circuit as described in claim 1 to 7 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104218551A CN104218551A (en) | 2014-12-17 |
| CN104218551B true CN104218551B (en) | 2017-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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) |
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| CN105449659B (en) * | 2015-12-30 | 2019-03-08 | 张旭 | Short-wave radio set upper low pressure trough protective device |
| CN106714389B (en) * | 2017-02-16 | 2019-05-21 | 深圳市晟碟半导体有限公司 | A kind of LED drive device and its surging protection circuit, carrying out surge protection method |
| CN110966155A (en) * | 2019-12-24 | 2020-04-07 | 赵华勇 | Double-purpose straight-flow pump |
| 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 |
| 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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| CN2057041U (en) * | 1989-09-21 | 1990-05-09 | 巨争号 | Over-voltage under-voltage and over-current protector for full-automatic refrigerator |
| US5894200A (en) * | 1997-03-26 | 1999-04-13 | Goodale, Jr.; Garold Joseph | Two terminal method of and apparatus for improving electrical and light producing efficiency in low voltage direct current incandescent lamp intensity control |
| CN201414240Y (en) * | 2009-06-04 | 2010-02-24 | 佛山市伊戈尔电业制造股份有限公司 | Buffer current-limiting circuit for LED illuminating lamp direct-current power source |
| CN102354965A (en) * | 2011-10-14 | 2012-02-15 | 江苏普明商贸有限公司 | Novel surge control circuit |
| CN102386618A (en) * | 2011-11-25 | 2012-03-21 | 苏州市万松电气有限公司 | Switch current limiter for heat-tracing transformer |
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2013
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2057041U (en) * | 1989-09-21 | 1990-05-09 | 巨争号 | Over-voltage under-voltage and over-current protector for full-automatic refrigerator |
| US5894200A (en) * | 1997-03-26 | 1999-04-13 | Goodale, Jr.; Garold Joseph | Two terminal method of and apparatus for improving electrical and light producing efficiency in low voltage direct current incandescent lamp intensity control |
| CN201414240Y (en) * | 2009-06-04 | 2010-02-24 | 佛山市伊戈尔电业制造股份有限公司 | Buffer current-limiting circuit for LED illuminating lamp direct-current power source |
| CN102354965A (en) * | 2011-10-14 | 2012-02-15 | 江苏普明商贸有限公司 | Novel surge control circuit |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104218551A (en) | 2014-12-17 |
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