CN103857157B - Light fixture open-circuit-protection system - Google Patents
Light fixture open-circuit-protection system Download PDFInfo
- Publication number
- CN103857157B CN103857157B CN201210505223.4A CN201210505223A CN103857157B CN 103857157 B CN103857157 B CN 103857157B CN 201210505223 A CN201210505223 A CN 201210505223A CN 103857157 B CN103857157 B CN 103857157B
- Authority
- CN
- China
- Prior art keywords
- triode
- light fixture
- relay
- circuit
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
A kind of light fixture open-circuit-protection system, for disconnecting the access power supply of light fixture when light fixture is in open circuit, is characterized in that, comprise current detection module, rectification module, voltage control module, Voltage stabilizing module and relay module; Described current detection module comprises current sense resistor R1, described rectification module comprises rectifier bridge B1, described voltage control module comprises divider resistance R2, triode Q1 and triode Q2, and described Voltage stabilizing module comprises voltage stabilizing didoe D1, and described relay module comprises relay K 1; When to receive voltage be zero for the base stage of triode Q2, namely current sense resistor R1 does not detect electric current, and triode Q2 ends, and the base stage of triode Q1 is connected with positive source by divider resistance R2, triode Q1 conducting.The electronic coil of relay K 1 obtains electric, and the normally closed switch of relay K 1 disconnects.The circuit that light fixture and trigger are formed does not have power supply input, thus can when light fixture is in open circuit or damages, and protection light fixture is not triggered the high pressure damage that device sends.
Description
Technical field
The present invention relates to open loop protection circuit, particularly relate to a kind of simple light fixture open-circuit-protection system.
Background technology
At present a lot of illumination fields major part or HID(high-voltage gas discharging light).HID is exactly the english abbreviation of HighintensityDischarge high-voltage gas discharging light, is the general designation of mercury, sodium, gold, xenon lamp, i.e. mercury lamp, sodium vapor lamp, Metal halogen lamp, xenon lamp.Wherein the principle of xenon lamp is in UV-cut uvioresistant crystal quartz glass tube, with number of chemical gas filling, wherein major part is the inert gas such as xenon (Xenon) and iodide, and then through booster (Ballast), low pressure (as 12 volts) direct voltage is pressurized to 4-5KV instantaneously, excite the xenon electronics in quartz ampoule to dissociate through high pressure amplitude of vibration, produce light source between electrodes.HID light source needs high pressure (4-5KV) triggering just can light when starting.When HID light source is in open circuit or damages, provide the trigger of high pressure constantly can send high pressure, light fixture safety can be affected like this and reduce life-span of electric elements in circuit.
Summary of the invention
Based on this, provide a kind of light fixture open-circuit-protection system disconnecting the access power supply of light fixture when light fixture is in open circuit.
A kind of light fixture open-circuit-protection system, for disconnecting the access power supply of light fixture when light fixture is in open circuit, comprises current detection module, rectification module, voltage control module, Voltage stabilizing module and relay module;
Described current detection module comprises current sense resistor R1, described rectification module comprises rectifier bridge B1, described voltage control module comprises divider resistance R2, triode Q1 and triode Q2, and described Voltage stabilizing module comprises voltage stabilizing didoe D1, and described relay module comprises relay K 1;
Described current sense resistor R1 one end is used for being connected with the live wire of AC power, and the other end of described current sense resistor R1 is connected with light fixture;
The input of described rectifier bridge B1 is connected to the two ends of current sense resistor R1, the earth terminal ground connection of described rectifier bridge B1, and the output of described rectifier bridge B1 is connected with the base stage of described triode Q2;
The collector electrode of described triode Q2 is connected with the base stage of described triode Q1, the equal ground connection of emitter of described triode Q1 and described triode Q2, and one end of described divider resistance R2 is connected with positive source, and the other end is connected with the base stage of described triode Q1;
One end of the electronic coil of described relay K 1 is connected with the collector electrode of described triode Q1, the other end of the electronic coil of described relay K 1 is used for being connected with positive source, and the normally closed switch of described relay K 1 is series between the live wire of described AC power and current sense resistor R1;
The positive pole of described voltage stabilizing didoe D1 is used for positive source and connects, and the negative pole of described voltage stabilizing didoe D1 is connected with the collector electrode of described triode Q1.
Wherein in an embodiment, also comprise filter capacitor C2, one end of described filter capacitor C2 is connected with the output of described rectifier bridge B1, the other end ground connection of described filter capacitor C2.
Wherein in an embodiment, also comprise current-limiting resistance R3, one end of described current-limiting resistance R3 is connected with the output of described rectifier bridge B1, and the other end of described current-limiting resistance R3 is connected with the base stage of described triode Q2.
Wherein in an embodiment, also comprise inductance L 1, described one end of inductance L 1 is connected with the zero line of AC power, and the other end of described inductance L 1 is used for being connected with trigger.
Wherein in an embodiment, also comprise electric capacity C1, between the zero line that described electric capacity C1 is parallel to described AC power and live wire.
Above-mentioned light fixture open loop protection circuit detects the electric current in light fixture and trigger forming circuit by current sense resistor R1, and will detect that current conversion becomes voltage transmission to triode Q2 by rectifier bridge B1.When the voltage that the base stage of triode Q2 receives is high voltage, namely current sense resistor R1 detects electric current, triode Q2 conducting, the collector electrode output low level of triode Q2, and thus triode Q1 ends, and relay K 1 is failure to actuate.The circuit that light fixture and trigger are formed normally works.When to receive voltage be zero for the base stage of triode Q2, namely current sense resistor R1 does not detect electric current, and triode Q2 ends, and the base stage of triode Q1 is connected with positive source by divider resistance R2, triode Q1 conducting.The electronic coil of relay K 1 obtains electric, and the normally closed switch of relay K 1 disconnects.The circuit that light fixture and trigger are formed does not have power supply input, thus can when light fixture is in open circuit or damages, and protection light fixture is not triggered the high pressure damage that device sends.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of light fixture open-circuit-protection system.
Embodiment
As shown in Figure 1, be the circuit theory diagrams of light fixture open-circuit-protection system.
A kind of light fixture open-circuit-protection system, for disconnecting the access power supply of light fixture when light fixture is in open circuit, comprises current detection module 101, rectification module 103, voltage control module 105, Voltage stabilizing module 107 and relay module 109.
Current detection module 101 comprises current sense resistor R1, rectification module 103 comprises rectifier bridge B1, voltage control module 105 comprises divider resistance R2, triode Q1 and triode Q2, and Voltage stabilizing module 107 comprises voltage stabilizing didoe D1, and relay module 109 comprises relay K 1.
Current sense resistor R1 one end is used for being connected with the live wire of AC power, and the other end of current sense resistor R1 is connected with light fixture.
The input of rectifier bridge B1 is connected to the two ends of current sense resistor R1, the earth terminal ground connection of rectifier bridge B1, and the output of rectifier bridge B1 is connected with the base stage of triode Q2.
The collector electrode of triode Q2 is connected with the base stage of triode Q1, and the equal ground connection of emitter of triode Q1 and triode Q2, one end of divider resistance R2 is connected with positive source, and the other end is connected with the base stage of triode Q1.
One end of the electronic coil of relay K 1 is connected with the collector electrode of triode Q1, and the other end of the electronic coil of relay K 1 is used for being connected with positive source, and the normally closed switch of relay K 1 is series between the live wire of AC power and current sense resistor R1.
The positive pole of voltage stabilizing didoe D1 is used for positive source and connects, and the negative pole of voltage stabilizing didoe D1 is connected with the collector electrode of triode Q1.
Light fixture open-circuit-protection system also comprises filter capacitor C2, and one end of filter capacitor C2 is connected with the output of rectifier bridge B1, the other end ground connection of filter capacitor C2.
Light fixture open-circuit-protection system also comprises current-limiting resistance R3, and one end of current-limiting resistance R3 is connected with the output of rectifier bridge B1, and the other end of current-limiting resistance R3 is connected with the base stage of triode Q2.
Light fixture open-circuit-protection system also comprises inductance L 1, and one end of inductance L 1 is connected with the zero line of AC power, and the other end of inductance L 1 is used for being connected with trigger.
Light fixture open-circuit-protection system also comprises electric capacity C1, and electric capacity C1 is parallel between the zero line of AC power and live wire.
Based on above-mentioned all embodiments, the operation principle of light fixture open-circuit-protection system is as follows:
When light fixture and trigger forming circuit normally work, current sense resistor R1 there is electric current to pass through.Thus, there is pressure drop at current sense resistor R1 two ends, and namely the input of rectifier bridge B1 has input voltage.Rectifier bridge B1 passes through current-limiting resistance R3 by voltage transmission to triode Q2, when the base stage of triode Q2 receives high level, triode Q2 conducting, thus the collector electrode output low level of triode Q2, make the base voltage of triode Q1 be low level, triode Q1 ends.The electronic coil of relay K 1 does not have voltage, and relay K 1 is failure to actuate, and namely the normally closed switch of relay K 1 remains closed.The circuit that light fixture and trigger are formed still keeps normal work.
When the open circuit that light fixture and trigger are formed, current sense resistor R1 does not have electric current to pass through.Namely be low level through rectifier bridge B1 and the current-limiting resistance R3 level be transferred in triode Q2 base stage, triode Q2 ends.Now the base stage of triode Q1 is connected with positive source by divider resistance R2, triode Q1 conducting.The electronic coil of relay K 1 obtains electric, and the normally closed switch of relay K 1 disconnects, and be namely disconnected the access power supply of the circuit that light fixture is formed with trigger, thus trigger cannot send triggering high pressure, avoids light fixture and to be triggered high pressure damage.
Voltage stabilizing didoe D1, when triode Q1 conducting, for triode Q1 provides stable pressure drop, makes triode Q1 keep conducting.
Above-mentioned light fixture open loop protection circuit detects the electric current in light fixture and trigger forming circuit by current sense resistor R1, and will detect that current conversion becomes voltage transmission to triode Q2 by rectifier bridge B1.When the voltage that the base stage of triode Q2 receives is high voltage, namely current sense resistor R1 detects electric current, triode Q2 conducting, the collector electrode output low level of triode Q2, and thus triode Q1 ends, and relay K 1 is failure to actuate.The circuit that light fixture and trigger are formed normally works.When to receive voltage be zero for the base stage of triode Q2, namely current sense resistor R1 does not detect electric current, and triode Q2 ends, and the base stage of triode Q1 is connected with positive source by divider resistance R2, triode Q1 conducting.The electronic coil of relay K 1 obtains electric, and the normally closed switch of relay K 1 disconnects.The circuit that light fixture and trigger are formed does not have power supply input, thus can when light fixture is in open circuit or damages, and protection light fixture is not triggered the high pressure damage that device sends.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (5)
1. a light fixture open-circuit-protection system, for disconnecting the access power supply of light fixture when light fixture is in open circuit, is characterized in that, comprise current detection module, rectification module, voltage control module, Voltage stabilizing module and relay module;
Described current detection module comprises current sense resistor R1, described rectification module comprises rectifier bridge B1, described voltage control module comprises divider resistance R2, triode Q1 and triode Q2, and described Voltage stabilizing module comprises voltage stabilizing didoe D1, and described relay module comprises relay K 1;
Described current sense resistor R1 one end is used for being connected with the live wire of AC power, and the other end of described current sense resistor R1 is connected with light fixture;
The input of described rectifier bridge B1 is connected to the two ends of current sense resistor R1, the earth terminal ground connection of described rectifier bridge B1, and the output of described rectifier bridge B1 is connected with the base stage of described triode Q2;
The collector electrode of described triode Q2 is connected with the base stage of described triode Q1, the equal ground connection of emitter of described triode Q1 and described triode Q2, and one end of described divider resistance R2 is connected with positive source, and the other end is connected with the base stage of described triode Q1;
One end of the electronic coil of described relay K 1 is connected with the collector electrode of described triode Q1, the other end of the electronic coil of described relay K 1 is used for being connected with positive source, and the normally closed switch of described relay K 1 is series between the live wire of described AC power and current sense resistor R1;
The positive pole of described voltage stabilizing didoe D1 is used for positive source and connects, and the negative pole of described voltage stabilizing didoe D1 is connected with the collector electrode of described triode Q1;
When the open circuit that light fixture and trigger are formed, current sense resistor R1 does not have electric current to pass through; Be low level through the rectifier bridge B1 level be transferred in triode Q2 base stage, triode Q2 ends; The base stage of triode Q1 is connected with positive source by divider resistance R2, triode Q1 conducting; The electronic coil of relay K 1 obtains electric, and the normally closed switch of relay K 1 disconnects, and is disconnected the access power supply of the circuit that light fixture and trigger are formed.
2. light fixture open-circuit-protection system according to claim 1, is characterized in that, also comprise filter capacitor C2, and one end of described filter capacitor C2 is connected with the output of described rectifier bridge B1, the other end ground connection of described filter capacitor C2.
3. light fixture open-circuit-protection system according to claim 1; it is characterized in that; also comprise current-limiting resistance R3, one end of described current-limiting resistance R3 is connected with the output of described rectifier bridge B1, and the other end of described current-limiting resistance R3 is connected with the base stage of described triode Q2.
4. light fixture open-circuit-protection system according to claim 1, is characterized in that, also comprise inductance L 1, and described one end of inductance L 1 is connected with the zero line of AC power, and the other end of described inductance L 1 is used for being connected with trigger.
5. light fixture open-circuit-protection system according to claim 1, is characterized in that, also comprise electric capacity C1, between the zero line that described electric capacity C1 is parallel to described AC power and live wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210505223.4A CN103857157B (en) | 2012-11-30 | 2012-11-30 | Light fixture open-circuit-protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210505223.4A CN103857157B (en) | 2012-11-30 | 2012-11-30 | Light fixture open-circuit-protection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103857157A CN103857157A (en) | 2014-06-11 |
| CN103857157B true CN103857157B (en) | 2016-04-13 |
Family
ID=50864233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210505223.4A Active CN103857157B (en) | 2012-11-30 | 2012-11-30 | Light fixture open-circuit-protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103857157B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104093250B (en) * | 2014-07-07 | 2016-04-27 | 电子科技大学 | A kind of open circuit over-pressure safety device for LED drive circuit |
| CN105251584B (en) * | 2014-07-15 | 2018-06-26 | 上海震旦办公设备有限公司 | Mechanically expire paper detecting apparatus for shredder |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2932912Y (en) * | 2006-01-23 | 2007-08-08 | 达方电子股份有限公司 | Light tube driving circuit |
| CN101451693A (en) * | 2007-11-30 | 2009-06-10 | 深圳市海洋王投资发展有限公司 | Lamp protection method and device, and lamp using the protection arrangement |
| CN101707828A (en) * | 2009-05-20 | 2010-05-12 | 海洋王照明科技股份有限公司 | Constant-current source driving circuit with open circuit protection and adopting LED |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005142130A (en) * | 2003-11-10 | 2005-06-02 | Matsushita Electric Works Ltd | High-pressure discharge lamp lighting device and luminaire |
-
2012
- 2012-11-30 CN CN201210505223.4A patent/CN103857157B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2932912Y (en) * | 2006-01-23 | 2007-08-08 | 达方电子股份有限公司 | Light tube driving circuit |
| CN101451693A (en) * | 2007-11-30 | 2009-06-10 | 深圳市海洋王投资发展有限公司 | Lamp protection method and device, and lamp using the protection arrangement |
| CN101707828A (en) * | 2009-05-20 | 2010-05-12 | 海洋王照明科技股份有限公司 | Constant-current source driving circuit with open circuit protection and adopting LED |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103857157A (en) | 2014-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10009975B2 (en) | Protection for retrofit light emitting diode tube | |
| CN105262074B (en) | Intrinsic safety current-limiting circuit and electronic equipment | |
| CN103444265A (en) | Straight tube led illumination lamp | |
| CN103857157B (en) | Light fixture open-circuit-protection system | |
| CN203775484U (en) | Intelligent LED fluorescent lamp in automatic identification compatibility mode | |
| CN101820714B (en) | Start protection and intelligent control interface circuit for low frequency electrodeless lamp | |
| CN101730362B (en) | Flash lamp control circuit | |
| CN207692115U (en) | A kind of ultraviolet radiator driving circuit of band protection circuit | |
| CN202841669U (en) | Novel electrodeless lamp ballast circuit | |
| CN101848593A (en) | Abnormal electronic ballast state protection circuit, electronic ballast and lamp | |
| CN208623326U (en) | A kind of high_voltage isolation over-voltage detection protection circuit | |
| CN207150928U (en) | It is passive to restart anti-hot wire circuit from surge self-resonance | |
| CN103428978B (en) | Lamp drive circuit and lamp using circuit | |
| CN103855681B (en) | Light fixture open loop protection circuit | |
| KR20040064828A (en) | Short protection circuit for magnetic-type ballast of high intensity discharge lamp | |
| CN201821562U (en) | Low-voltage fluorescent lamp | |
| KR101039867B1 (en) | Rc type ballast stabilizer circuit | |
| CN106163025B (en) | A kind of electronic ballast protecting circuit | |
| CN201528457U (en) | Electronic ballast for electrodeless lamp | |
| CN202941031U (en) | Gas discharge lamp protection circuit | |
| CN103857158B (en) | Gas discharge lamp circuit and protective circuit thereof | |
| CN201114937Y (en) | Constant power high-voltage gas discharger | |
| CN105025645A (en) | Safe starting circuit for electronic ballast of electrodeless lamp | |
| CN107371312A (en) | It is passive to restart anti-hot wire circuit from surge self-resonance | |
| CN202587563U (en) | Inductance ballast high-voltage trigger startup system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |