CN101848593A - Abnormal electronic ballast state protection circuit, electronic ballast and lamp - Google Patents
Abnormal electronic ballast state protection circuit, electronic ballast and lamp Download PDFInfo
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- CN101848593A CN101848593A CN201010190116A CN201010190116A CN101848593A CN 101848593 A CN101848593 A CN 101848593A CN 201010190116 A CN201010190116 A CN 201010190116A CN 201010190116 A CN201010190116 A CN 201010190116A CN 101848593 A CN101848593 A CN 101848593A
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Abstract
The invention, which is applicable to the field of electric lamps, provides an abnormal electronic ballast state protection circuit, an electronic ballast and a lamp. The abnormal electronic ballast state protection circuit comprises a trigger unit, an inverter unit and a protection unit. In the embodiment of the invention, when the electronic ballast outputs overvoltage or overcurrent, the protection unit of the abnormal electronic ballast state protection circuit can simultaneously control the inverter unit and the trigger unit to stop operation, consequently, the inverter unit cannot be triggered by the trigger unit to restart, so that the abnormal electronic ballast state protection circuit can be prevented from being in the vicious circle of protection, trigger and protection, and therefore the abnormal electronic ballast state protection circuit can fully protect a fluorescent tube, thus ensuring the normal operation of the lamp.
Description
Technical field
The invention belongs to field of lamps, relate in particular to a kind of electron ballast abnormality state protection circuit, electric ballast and light fixture.
Background technology
Electric ballast is as the important accessory of light fixture, and it is luminous to be used for the driving fluorescent lamp pipe, so the operating state of electric ballast, can directly have influence on the work of light fixture.So when the state of electric ballast takes place when unusual, when overvoltage or overcurrent occurring such as the voltage of electric ballast output or electric current, the electron ballast abnormality state protection circuit will play a protective role, and makes fluorescent tube not be damaged.
Existing electron ballast abnormality state protection circuit is when overvoltage or overcurrent appear in the voltage of electric ballast output or electric current; taking to control the out-of-work mode of inversion unit protects fluorescent tube; but but trigger element is not controlled; inversion unit can startup work under the triggering of trigger element; so the electron ballast abnormality state protection circuit can be in the poor circulation of protection, triggering, protection; abundant inadequately to the protection of fluorescent tube like this, can have influence on the operate as normal of light fixture.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of electron ballast abnormality state protection circuit, is intended to solve existing electron ballast abnormality state protection circuit and exists the sufficient inadequately problem of fluorescent tube protection.
The embodiment of the invention is achieved in that a kind of electron ballast abnormality state protection circuit, and described protective circuit comprises:
Trigger element, its input termination DC power supply is used to generate triggering signal;
Inversion unit, the described DC power supply of its input termination, the output of the described trigger element of triggering termination of described inversion unit, the output termination fluorescent tube of described inversion unit, being used for according to described triggering signal, is alternating voltage with the direct voltage inversion, and the driving fluorescent lamp pipe is luminous; And
Protected location; it detects the feedback end of the described inversion unit of termination; the input of the described trigger element of the first control termination of described protected location; the control end of the described inversion unit of the second control termination of described protected location; the alternating current voltage that is used for the described inversion unit output of sample detecting; and when overvoltage or overcurrent appear in the alternating current that detects described inversion unit output, control described trigger element and inversion unit and quit work simultaneously.
Another purpose of the embodiment of the invention is to provide a kind of electric ballast that comprises above-mentioned electron ballast abnormality state protection circuit.
Another purpose of the embodiment of the invention is to provide a kind of light fixture, comprises fluorescent tube, and light fixture also comprises above-mentioned electric ballast.
In embodiments of the present invention; the electron ballast abnormality state protection circuit is when overvoltage or overcurrent appear in the voltage of electric ballast output or electric current; its protected location controls inversion unit simultaneously and trigger element quits work; like this; inversion unit can not restart work under the triggering of trigger element; avoided the electron ballast abnormality state protection circuit to be in the poor circulation of protection, triggering, protection; therefore; the electron ballast abnormality state protection circuit can adequately protect to fluorescent tube, guarantees the operate as normal of light fixture.
Description of drawings
Fig. 1 is the structure chart of the electron ballast abnormality state protection circuit that provides of the embodiment of the invention;
Fig. 2 is the exemplary circuit figure of the electron ballast abnormality state protection circuit that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The electron ballast abnormality state protection circuit that the embodiment of the invention provides is when overvoltage or overcurrent appear in the voltage of electric ballast output or electric current; its protected location controls inversion unit simultaneously and trigger element quits work; like this; inversion unit can not restart work under the triggering of trigger element; avoided the electron ballast abnormality state protection circuit to be in the poor circulation of protection, triggering, protection; therefore; the electron ballast abnormality state protection circuit can adequately protect to fluorescent tube, guarantees the operate as normal of light fixture.
Fig. 1 shows the structure of the electron ballast abnormality state protection circuit that the embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention.
The electron ballast abnormality state protection circuit comprises trigger element 100, inversion unit 200 and protected location 300.
The input termination DC power supply of trigger element 100 is used to generate triggering signal;
The input termination DC power supply of inversion unit 200, the output of the trigger end contact bill unit 100 of inversion unit 200, the output termination fluorescent tube of inversion unit 200 is used for according to triggering signal, with the direct voltage inversion is alternating voltage, and the driving fluorescent lamp pipe is luminous;
The feedback end of the detection termination inversion unit 200 of protected location 300; the input of first control end contact bill unit 100 of protected location 300; the control end of the second control termination inversion unit 200 of protected location 300; the alternating current voltage that is used for 200 outputs of sample detecting inversion unit; and when overvoltage or overcurrent appearred in the alternating current that detects inversion unit 200 outputs, control trigger element 100 and inversion unit 200 quit work simultaneously.
When overvoltage or overcurrent appear in the voltage of electric ballast output or electric current; protected location 300 controls inversion unit 200 simultaneously and trigger element 100 quits work; inversion unit 200 can not restart work under the triggering of trigger element 100, avoided the electron ballast abnormality state protection circuit to be in the poor circulation of protection, triggering, protection.
Fig. 2 shows the exemplary circuit structure of the electron ballast abnormality state protection circuit that the embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention.
As one embodiment of the invention, protected location 300 comprises:
The input of sampling module 301 is the feedback end of the detection termination inversion unit 200 of protected location 300; the input of the output termination rectification module 302 of sampling module 301; the output of rectification module 302 connects first end of storage capacitor C5 simultaneously; first end of first end of divider resistance R8 and first switching tube 303; second end of storage capacitor C5 and second end of divider resistance R8 be ground connection simultaneously; second end of first switching tube 303 connects the control end of second switch pipe 304 and the 3rd switching tube 305 simultaneously; the second end ground connection of second switch pipe 304; first end of second switch pipe 304 is the input of first control end contact bill unit 100 of protected location 300; the second end ground connection of the 3rd switching tube 305, first end of the 3rd switching tube 305 are the control end of the second control termination inversion unit 200 of protected location 300.
As one embodiment of the invention, sampling module 301 comprises Chip-R R41, Chip-R R40, Chip-R R21, Chip-R R20 and the Chip-R R15 of series connection successively, first end of Chip-R R41 is the input of sampling module 301, the second end ground connection of Chip-R R15, the link of Chip-R R20 and Chip-R R15 is the output of sampling module 301.
As one embodiment of the invention, rectification module 302 comprises capacitor C 7 and rectifying tube Q3, first end of capacitor C 7 is the input of rectification module 302, the input of the second termination rectifying tube Q3 of capacitor C 7, the earth terminal ground connection of rectifying tube Q3, the output of rectifying tube Q3 are the output of rectification module 302.
As one embodiment of the invention, first switching tube 303 is voltage stabilizing didoe D6, and the negative electrode of voltage stabilizing didoe D6 is first end of first switching tube 303, and the anode of voltage stabilizing didoe D6 is second end of first switching tube 303.
As one embodiment of the invention, second switch pipe 304 is controllable silicon VT4, the control end of controllable silicon VT4 is the control end of second switch pipe 304, and the negative electrode of controllable silicon VT4 is second end of second switch pipe 304, and the anode of controllable silicon VT4 is first end of second switch pipe 304.
As one embodiment of the invention, the 3rd switching tube 305 is triode VT3, the base stage of triode VT3 is the control end of the 3rd switching tube 305, and the emission of triode VT3 is second end of the 3rd switching tube 305 very, and the current collection of triode VT3 is first end of the 3rd switching tube 305 very.
As one embodiment of the invention, trigger element 100 is storage capacitor C1, and first end of storage capacitor C1 is the input and the output of trigger element 100, the second end ground connection of storage capacitor C1.
As one embodiment of the invention, inversion unit 200 comprises:
Divider resistance R1, divider resistance R2, divider resistance R3, divider resistance R4, divider resistance R5, divider resistance R6, divider resistance R7, inductance N1, inductance N2, inductance N3, transformer L2, storage capacitor C2, variable capacitance diode D2, voltage stabilizing didoe D3, triode VT1 and triode VT2;
First end of divider resistance R1; first end of storage capacitor C2; first end of divider resistance R3 and the collector electrode of triode VT1 are the input termination DC power supply of inversion unit 200 simultaneously; first end of the second termination divider resistance R2 of divider resistance R1; first control end that is connected termination protected location 300 of divider resistance R1 and divider resistance R2; the input of the second termination trigger element 100 of divider resistance R2; the emitter of triode VT1 connects first end of divider resistance R4; the base stage of triode VT1 connects first end of divider resistance R5; first end of the second termination inductance N1 of divider resistance R5; the anode of variable capacitance diode D2 connects second end of divider resistance R2; the negative electrode of variable capacitance diode D2 meets storage capacitor C2 simultaneously; divider resistance R3; second end of divider resistance R4 and inductance N1; second end of the first termination inductance N1 of inductance N3; first end of the elementary winding of the second termination transformer L2 of inductance N3; second end of the elementary winding of transformer L2 is the positive pole of the output termination fluorescent tube of inversion unit 200; the positive pole of fluorescent tube connects the negative pole of fluorescent tube by capacitor C 27; first end of the secondary winding of transformer L2 is the test side of the feedback termination protected location 300 of inversion unit 200; the second end ground connection of the secondary winding of transformer L2; the negative electrode of voltage stabilizing didoe D3 is the output of the trigger end contact bill unit 100 of inversion unit 200; the anode of voltage stabilizing didoe D3 connects the base stage of triode VT2; the base stage of triode VT2 is second control end of the control termination protected location 300 of inversion unit 200; the base stage of triode VT2 is by the divider resistance R7 and the inductance N2 ground connection of serial connection; the collector electrode of triode VT2 connects the negative electrode of variable capacitance diode D2, and the emitter of triode VT2 is by divider resistance R6 ground connection.
The embodiment of the invention also provides a kind of electric ballast, and electric ballast comprises above-mentioned electron ballast abnormality state protection circuit.
The embodiment of the invention also provides a kind of light fixture, comprises fluorescent tube, and light fixture also comprises above-mentioned electric ballast.
Be the operation principle of example explanation electron ballast abnormality state protection circuit below with the light fixture:
The output voltage of the both end voltage reflection electric ballast of the secondary winding of transformer L2, the both end voltage that sampling module 301 is gathered the secondary winding of transformer L2, and through after rectification module 302 rectifications, C5 stores by storage capacitor, when the voltage of electric ballast output or electric current just often, the undertension at storage capacitor C5 two ends is so that voltage stabilizing didoe D6 puncture, triode VT3 and controllable silicon VT4 can't conductings because obtaining enough trigger currents, the electron ballast abnormality state protection circuit does not play a protective role, and trigger element 100 and inversion unit 200 be operate as normal all;
When overvoltage or overcurrent appear in the voltage of electric ballast output or electric current; the voltage at storage capacitor C5 two ends is enough to make voltage stabilizing didoe D6 to puncture, and triode VT3 and all conductings of controllable silicon VT4 are because triode VT3 conducting; the base stage of triode VT2 is by short circuit; inversion unit 200 can't be worked, because controllable silicon VT4 conducting, storage capacitor C1 can not get electric charge; can't trigger inversion unit 200 work; like this, trigger element 100 and inversion unit 200 all can't be worked, and fluorescent tube is protected.
Because the hardware protection circuit that the protected location of electron ballast abnormality state protection circuit adopts discrete component to constitute, the programme controlled protection chip with respect to former employing has improved protection speed.In addition, sampling module adopts Chip-R to replace power resistor, has reduced cost, has improved the reliability of circuit, makes circuit more simple and reliable.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an electron ballast abnormality state protection circuit is characterized in that, described protective circuit comprises:
Trigger element, its input termination DC power supply is used to generate triggering signal;
Inversion unit, the described DC power supply of its input termination, the output of the described trigger element of triggering termination of described inversion unit, the output termination fluorescent tube of described inversion unit, being used for according to described triggering signal, is alternating voltage with the direct voltage inversion, and the driving fluorescent lamp pipe is luminous; And
Protected location; it detects the feedback end of the described inversion unit of termination; the input of the described trigger element of the first control termination of described protected location; the control end of the described inversion unit of the second control termination of described protected location; the alternating current voltage that is used for the described inversion unit output of sample detecting; and when overvoltage or overcurrent appear in the alternating current that detects described inversion unit output, control described trigger element and inversion unit and quit work simultaneously.
2. electron ballast abnormality state protection circuit as claimed in claim 1 is characterized in that, described protected location comprises:
Sampling module, rectification module, first switching tube, second switch pipe, the 3rd switching tube, storage capacitor C5 and divider resistance R8;
The input of described sampling module is the feedback end of the described inversion unit of detection termination of protected location; the input of the output termination rectification module of described sampling module; the output of described rectification module connects first end of storage capacitor C5 simultaneously; first end of divider resistance R8 and first end of first switching tube; second end of described storage capacitor C5 and second end of divider resistance R8 be ground connection simultaneously; second end of described first switching tube connects second switch pipe and the 3rd control end of switching tube simultaneously; the second end ground connection of described second switch pipe; first end of described second switch pipe is the input of first control end contact bill unit of protected location; the second end ground connection of described the 3rd switching tube, first end of described the 3rd switching tube are the control end of the second control termination inversion unit of protected location.
3. electron ballast abnormality state protection circuit as claimed in claim 2; it is characterized in that; described sampling module comprises Chip-R R41, Chip-R R40, Chip-R R21, Chip-R R20 and the Chip-R R15 of series connection successively; first end of described Chip-R R41 is the input of sampling module; the second end ground connection of described Chip-R R15, the link of described Chip-R R20 and Chip-R R15 is the output of described sampling module.
4. electron ballast abnormality state protection circuit as claimed in claim 2; it is characterized in that; described rectification module comprises capacitor C 7 and rectifying tube Q3; first end of described capacitor C 7 is the input of rectification module; the input of the second termination rectifying tube Q3 of described capacitor C 7; the earth terminal ground connection of described rectifying tube Q3, the output of described rectifying tube Q3 are the output of rectification module.
5. electron ballast abnormality state protection circuit as claimed in claim 2; it is characterized in that; described first switching tube is voltage stabilizing didoe D6; the negative electrode of described voltage stabilizing didoe D6 is first end of first switching tube; the anode of described voltage stabilizing didoe D6 is second end of first switching tube; described second switch pipe is controllable silicon VT4; the control end of described controllable silicon VT4 is the control end of second switch pipe; the negative electrode of described controllable silicon VT4 is second end of second switch pipe, and the anode of described controllable silicon VT4 is first end of second switch pipe.
6. electron ballast abnormality state protection circuit as claimed in claim 2; it is characterized in that; described the 3rd switching tube is triode VT3; the base stage of described triode VT3 is the 3rd control end of switching tube; the emission of described triode VT3 is second end of the 3rd switching tube very, and the current collection of described triode VT3 is first end of the 3rd switching tube very.
7. electron ballast abnormality state protection circuit as claimed in claim 1 is characterized in that, described trigger element is storage capacitor C1, and first end of described storage capacitor C1 is the input and the output of trigger element, the second end ground connection of described storage capacitor C1.
8. electron ballast abnormality state protection circuit as claimed in claim 1 is characterized in that, described inversion unit comprises:
Divider resistance R1, divider resistance R2, divider resistance R3, divider resistance R4, divider resistance R5, divider resistance R6, divider resistance R7, inductance N1, inductance N2, inductance N3, transformer L2, storage capacitor C2, variable capacitance diode D2, voltage stabilizing didoe D3, triode VT1 and triode VT2;
First end of described divider resistance R1; first end of storage capacitor C2; first end of divider resistance R3 and the collector electrode of triode VT1 are the input termination DC power supply of inversion unit simultaneously; first end of the second termination divider resistance R2 of described divider resistance R1; first control end that is connected the termination protected location of described divider resistance R1 and divider resistance R2; the input of the second termination trigger element of described divider resistance R2; the emitter of triode VT1 connects first end of divider resistance R4; the base stage of triode VT1 connects first end of divider resistance R5; first end of the second termination inductance N1 of divider resistance R5; the anode of described variable capacitance diode D2 connects second end of described divider resistance R2; the negative electrode of described variable capacitance diode D2 meets described storage capacitor C2 simultaneously; divider resistance R3; second end of divider resistance R4 and inductance N1; second end of the first termination inductance N1 of described inductance N3; first end of the elementary winding of the second termination transformer L2 of described inductance N3; second end of the elementary winding of described transformer L2 is the positive pole of the output termination fluorescent tube of inversion unit; first end of the secondary winding of described transformer L2 is the test side of the feedback termination protected location of inversion unit; the second end ground connection of the secondary winding of described transformer L2; the negative electrode of described voltage stabilizing didoe D3 is the output of the trigger end contact bill unit of inversion unit; the anode of described voltage stabilizing didoe D3 connects the base stage of triode VT2; the base stage of described triode VT2 is second control end of the control termination protected location of inversion unit; the base stage of described triode VT2 is by the divider resistance R7 and the inductance N2 ground connection of serial connection; the collector electrode of described triode VT2 connects the negative electrode of variable capacitance diode D2, and the emitter of described triode VT2 is by divider resistance R6 ground connection.
9. an electric ballast is characterized in that, described electric ballast comprises each described electron ballast abnormality state protection circuit as claim 1-8.
10. a light fixture comprises fluorescent tube, it is characterized in that, described light fixture also comprises electric ballast as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010190116.8A CN101848593B (en) | 2010-05-27 | 2010-05-27 | Abnormal electronic ballast state protection circuit, electronic ballast and lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010190116.8A CN101848593B (en) | 2010-05-27 | 2010-05-27 | Abnormal electronic ballast state protection circuit, electronic ballast and lamp |
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| Publication Number | Publication Date |
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| CN101848593A true CN101848593A (en) | 2010-09-29 |
| CN101848593B CN101848593B (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010190116.8A Active CN101848593B (en) | 2010-05-27 | 2010-05-27 | Abnormal electronic ballast state protection circuit, electronic ballast and lamp |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324726A (en) * | 2011-05-31 | 2012-01-18 | 缪仙荣 | Abnormal protection circuit of electronic ballast |
| CN102523669A (en) * | 2011-12-09 | 2012-06-27 | 三峡大学 | Abnormality protection circuit for electronic ballast of cold cathode lamp |
| CN106163066A (en) * | 2015-03-19 | 2016-11-23 | 李少华 | Electronic ballast protecting circuit |
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| JPH02262830A (en) * | 1989-02-23 | 1990-10-25 | Fujitsu General Ltd | Overcurrent protective circuit for inverter controller |
| CN2176633Y (en) * | 1993-12-20 | 1994-09-07 | 曹泉胜 | Electronic ballast for powerful and multiple loads |
| CN1845651A (en) * | 2006-03-21 | 2006-10-11 | 横店得邦电子有限公司 | Positive feedback abnormal protection circuit |
| CN1937877A (en) * | 2006-09-12 | 2007-03-28 | 横店得邦电子有限公司 | Electronic ballast circuit with automatic restart function |
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2010
- 2010-05-27 CN CN201010190116.8A patent/CN101848593B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02262830A (en) * | 1989-02-23 | 1990-10-25 | Fujitsu General Ltd | Overcurrent protective circuit for inverter controller |
| CN2176633Y (en) * | 1993-12-20 | 1994-09-07 | 曹泉胜 | Electronic ballast for powerful and multiple loads |
| CN1845651A (en) * | 2006-03-21 | 2006-10-11 | 横店得邦电子有限公司 | Positive feedback abnormal protection circuit |
| CN1937877A (en) * | 2006-09-12 | 2007-03-28 | 横店得邦电子有限公司 | Electronic ballast circuit with automatic restart function |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324726A (en) * | 2011-05-31 | 2012-01-18 | 缪仙荣 | Abnormal protection circuit of electronic ballast |
| CN102324726B (en) * | 2011-05-31 | 2013-12-25 | 缪仙荣 | Abnormal protection circuit of electronic ballast |
| CN102523669A (en) * | 2011-12-09 | 2012-06-27 | 三峡大学 | Abnormality protection circuit for electronic ballast of cold cathode lamp |
| CN102523669B (en) * | 2011-12-09 | 2014-03-05 | 三峡大学 | Abnormality protection circuit for electronic ballast of cold cathode lamp |
| CN106163066A (en) * | 2015-03-19 | 2016-11-23 | 李少华 | Electronic ballast protecting circuit |
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| CN101848593B (en) | 2014-03-12 |
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