CN102163833A - Extension-type electrical ballast magnetic induction protector - Google Patents
Extension-type electrical ballast magnetic induction protector Download PDFInfo
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- CN102163833A CN102163833A CN2011100246737A CN201110024673A CN102163833A CN 102163833 A CN102163833 A CN 102163833A CN 2011100246737 A CN2011100246737 A CN 2011100246737A CN 201110024673 A CN201110024673 A CN 201110024673A CN 102163833 A CN102163833 A CN 102163833A
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- 230000006698 induction Effects 0.000 title claims abstract description 20
- 230000001012 protector Effects 0.000 title abstract 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 14
- 239000010703 silicon Substances 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims description 29
- 230000001681 protective effect Effects 0.000 claims description 23
- 239000003381 stabilizer Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses an extension-type electrical ballast magnetic induction protector, which comprises a protection circuit which is connected with an electrical ballast. The protector is characterized in that the protection circuit mainly comprises a transformer T3, a diode D5, a voltage-regulator tube Z1, a silicon controlled Q3, an audion Q4, a resistor R1, a resistor R3 and a resistor R4 on a dual-pump half-bridge inverter output loop, wherein the diode D5 is connected with 1-2 secondary pins of a magnetic induction inductor T3 in series; and the voltage-regulator tube Z1 is connected with a control electrode of the silicon controlled Q3. The protector is used for ideally solving the problem of overvoltage protection, overload, open circuit, short circuit, overtemperature and other faults simultaneously and effectively prolonging the service life of the electrical ballast.
Description
Technical field
The present invention relates to the electronic technology field that throws light on, relate to a kind of protective device of electric ballast of bushing type fluorescent lamp more specifically.
Background technology
In order to make illumination more efficient, humanly use the low pressure gaseous discharge fluorescent lamp instead from the low incandescent lamp of early stage luminous efficiency, be commonly called as fluorescent lamp, because of it has higher luminous efficiency, the life-span is long, lamp hole temperature is low characteristics, so become the main flow of illumination.Yet itself has negative resistance property fluorescent lamp, causes the unconfined rising of lamp current, finally causes fluorescent tube to burn.Come the interior electric current of restricted passage fluorescent tube so need to install additional ballast under the situation of interchange electric light.Ballast can be lighted the fluorescent tube instantaneous pressure and stable operation, and the used ballast of fluorescent lamp is the regulating and controlling system that is series at outside the fluorescent lamp, and itself is made of inductor.Traditional ballast is to be wound on the silicon steel plate core magnetic circuit with enamelled wire, constitutes anti-coil unshakable in one's determination.When electric current produces pressure drop because of impedance relationship can make the coil two ends during by coil, electric current is bigger, and pressure drop is just bigger.Because ballast is connect with fluorescent lamp, so the voltage increase of ballast can make the voltage of fluorescent tube reduce, and makes the lamp tube current minimizing, suppresses the quick variation of lamp current by ballast, reaches the voltage of stablizing fluorescent tube and the function of electric current.Though the tradition ballast is simple in structure, it still has many shortcomings, and for example input power factor is low excessively, the phenomenons such as fluorescent tube flicker that efficient is poor, volume is heavy greatly again, running is produced when low frequency.In order to improve the shortcoming of traditional ballast, electric ballast is lit a lamp with the high frequency electric source vibration, improves fluorescent tube in the low frequency flicker phenomenon.In addition, if fluorescent tube works under the high frequency electric source, operational paradigm also can promote.The main circuit framework of electronic ballast becomes AC/DC change of current bearing resonant circuit and combines.The basic principle of electric ballast is at first with the alternating current of the power supply 50Hz to 60Hz of commercial frequency, be rectified into direct current, produce the high-frequency alternating current of 20KHz to 60KHz then via AC system concussion loop, produce metering function through the loop that lights a lamp again, and the preheating fluorescent tube, and about one second, light fluorescent tube.Though electric ballast has plurality of advantages; but the loop of electric ballast usually is subjected to the influence of load variations at present; break and gas leakage etc. as fluorescent tube; the operation of electric ballast is also taken place unusually; even burn; or, circuit causes the danger of fire because of cocking off; therefore; the IEC928 of International Electrotechnical Commission's promulgation; in two standards of IEC929; the electron ballast abnormality state protected automatically proposed requirement; the electronic protection circuit of substantially all forming that electric ballast adopted that has at present the abnormal condition protection device on the market by transistor; its complex structure; function singleness, even just circuit is protected after just electric ballast breaks down, be difficult to satisfy the demands of consumers.Particularly the bushing type fluorescent tube is self-ballast integrated fluorescent tube at present, because the space is limited, so there are not line protective devices at all, brings bigger waste and security threat to the user.
Summary of the invention
Purpose of the present invention is exactly provide for the deficiency that solves prior art a kind of simple in structure; safe and reliable; can solve the protection of several faults such as overvoltage, overload, open circuit, short circuit and overtemperature simultaneously, the bushing type electric ballast magnetic induction protective device that has more effectively prolonged the useful life of electric ballast.
The present invention adopts following technical solution to realize above-mentioned purpose: a kind of bushing type electric ballast magnetic induction protective device; comprise the protective circuit that connects an electric ballast; electric ballast is divided into lamp body two ends lamp holder; it is characterized in that: described protective circuit mainly is made of the transformer T3 that is arranged on double pump semi-bridge inversion output loop, diode D5, voltage-stabiliser tube Z1, controllable silicon Q3, triode Q4 and resistance R 1, R3, R4; T3 level of diode D5 and magnetic induction inductance 1-2 pin is connected in series, and voltage-stabiliser tube Z1 connects the controllable silicon Q3 control utmost point.
Described electric ballast comprises the bridge rectifier of being made up of diode D1, D2, D3, D4 of external 220V power supply, 220V voltage forms starting voltage through resistance R 5, R6 through the rectification circuit after-current on capacitor C 7, trigger the DB3 trigger tube of 33V and start ballast circuit.
Described bridge rectifier is connected with the filter circuit of being made up of electrochemical capacitor C1, electrochemical capacitor C1 also is connected to capacitor C 7 and diode D7, diode D7 is connected to capacitor C 7 upper ends, remain on 48V and make D7 be added with reverse voltage by voltage after the dividing potential drop electrochemical capacitor C1 filtering of resistance R 1, R3, D7 is ended, inoperative to the operate as normal of circuit.
Described electric ballast also comprises the series resonant circuit of mainly being made up of triode Q1, Q2, impedance L5, L6 and capacitor C 9, triode Q1 is connected with magnet ring T1, the emitter of triode Q1 links to each other with the collector electrode of triode Q2, be connected with a triode Q4 on the base stage of triode Q2, the collector electrode of triode Q4 links to each other with 6 pin of magnet ring T1 by resistance R 9.
Described diode D5 also is connected to capacitor C 10; the starting resistor of protective circuit is that the secondary 1-2 feel of magnetic induction inductance T3 answers voltage to be higher than 12V; this voltage is through diode D5 rectification; after capacitor C 10 filtering; 12V voltage-stabiliser tube Z1 is punctured; trigger controllable silicon Q3 conducting; voltage after the Q3 conducting directly is added in the base stage of triode Q4; make the Q4 conducting, by the Q4 short circuit, Q2 ends because of no feedback voltage the feedback signal of magnet ring 6 pin through R9; simultaneously because the conducting resistance R1 of controllable silicon Q3; the dividing point of R3 is also reduced to 1V; capacitor C 7 two ends also are clamped at below the 3V because of the access of diode D7, make DB3 can not get trigger voltage, Q1 Q2 also with regard to all by and quit work.
The beneficial effect that the present invention adopts above-mentioned technical solution to reach is:
The present invention provides a kind of safe and reliable protection for the integrated electric ballast of electronics head; it comprises bridge rectifier; start-up circuit; the switch oscillating circuit; the transformer feedback coupling circuit; output circuit; protective circuit constitutes jointly; electric ballast can be used for the straight tube fluorescent lamp; annular daylight lamp; utilize magnetic induction principle to cut off the coupled signal and the enabling signal of switch oscillating circuit; make the switching tube failure of oscillations and realize protection electric ballast; thereby solved overvoltage in the time of very good; overload; open circuit; the protection of several faults such as short circuit and overtemperature has more effectively prolonged useful life of electric ballast.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
As shown in Figure 1; a kind of bushing type electric ballast of the present invention magnetic induction protective device; comprise the protective circuit that connects an electric ballast; electric ballast is divided into lamp body two ends lamp holder, and electric ballast mainly is made of jointly bridge rectifier, start-up circuit, switch oscillating circuit, transformer feedback coupling circuit, output circuit, protective circuit.Protective circuit mainly is made of the transformer T3 that is arranged on double pump semi-bridge inversion output loop, diode D5, voltage-stabiliser tube Z1, controllable silicon Q3, triode Q4 and resistance R 1, R3, R4; T3 level of diode D5 and magnetic induction inductance 1-2 pin is connected in series, and voltage-stabiliser tube Z1 connects the controllable silicon Q3 control utmost point.Bridge rectifier is made up of diode D1, D2, D3, D4, external 220V power supply.220V voltage forms starting voltage through resistance R 5, R6 through the rectification circuit after-current on capacitor C 7, trigger the DB3 trigger tube of 33V and start ballast circuit, makes it enter normal operating state.Bridge rectifier is connected with the filter circuit of being made up of electrochemical capacitor C1, electrochemical capacitor C1 also is connected to capacitor C 7 and diode D7, diode D7 is connected to capacitor C 7 upper ends, remain on 48V and make D7 be added with reverse voltage by voltage after the dividing potential drop electrochemical capacitor C1 filtering of resistance R 1, R3, D7 is ended, inoperative to the operate as normal of circuit.Q3; Q4 also is in cut-off state because of triggerless voltage; the 3-4 pin string of T3 is in output loop; during operate as normal; the 1-2 pin of T3 since the induction voltage through D5, voltage is very little after the C10 filtering, is not enough to puncture 12V voltage-stabiliser tube Z1; can not trigger the protective circuit of forming by Q3Q4, make entire circuit be in normal operating conditions.If certain reason causes output back level load faulty, such as: overcurrent, overvoltage, no fluorescent tube or fluorescent tube are aging, can not starter, when gas leakage waits, the series connection of being made up of triode Q1, Q2, impedance L5, L6, capacitor C 9 circuit that all shakes will produce very high voltage and current, wherein triode Q1 is connected with magnet ring T1, the emitter of triode Q1 links to each other with the collector electrode of triode Q2, be connected with a triode Q4 on the base stage of triode Q2, the collector electrode of triode Q4 links to each other with 6 pin of magnet ring T1 by resistance R 9.The elementary 3-4 pin of the magnetic induction inductance T3 in the loop of going here and there will inevitably flow through high voltage and electric current.And will produce an induced voltage that is higher than more than the 12V at secondary 1-2 pin, this voltage after capacitor C 10 filtering, punctures 12V voltage-stabiliser tube Z1 through diode D5 rectification, and then trigger controllable silicon Q3 conducting, the voltage after the controllable silicon Q3 conducting directly is added in the base stage of triode Q4.Make the Q4 conducting, by triode Q4 short circuit, triode Q2 ends because of no feedback voltage the feedback signal of magnet ring 6 pin after resistance R 9, simultaneously because the dividing point of conducting resistance R1, the R3 of Q3 also reduces to 1 by original 48V.Below the 5V, capacitor C 7 two ends also are clamped at below the 3V because of the access of diode D7, make DB3 can not get trigger voltage.Triode Q1, Q2 also with regard to all by and quit work.
Protective circuit can automatically restore to normal condition behind powered-down, as fault and do not get rid of, and it enters into guard mode with horse back again after the energized.Enter into total current after the guard mode about about 0.001A.The power that whole electric ballast consumes is less than 0.5 watt, and power factor can reach 0.99, and harmonic wave can reach 10, and loss is less than 10%.
Above-described only is preferred implementation of the present invention, should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the invention design, can also make some distortion and improvement, and these all belong to protection scope of the present invention.
Claims (5)
1. bushing type electric ballast magnetic induction protective device; comprise the protective circuit that connects an electric ballast; electric ballast is divided into lamp body two ends lamp holder; it is characterized in that: described protective circuit mainly is made of the transformer T3 that is arranged on double pump semi-bridge inversion output loop, diode D5, voltage-stabiliser tube Z1, controllable silicon Q3, triode Q4 and resistance R 1, R3, R4; T3 level of diode D5 and magnetic induction inductance 1-2 pin is connected in series, and voltage-stabiliser tube Z1 connects the controllable silicon Q3 control utmost point.
2. bushing type electric ballast magnetic induction protective device according to claim 1; it is characterized in that; described electric ballast comprises the bridge rectifier of being made up of diode D1, D2, D3, D4 of external 220V power supply; 220V voltage forms starting voltage through resistance R 5, R6 through the rectification circuit after-current on capacitor C 7, trigger the DB3 trigger tube of 33V and start ballast circuit.
3. bushing type electric ballast magnetic induction protective device according to claim 1 and 2; it is characterized in that; described bridge rectifier is connected with the filter circuit of being made up of electrochemical capacitor C1; electrochemical capacitor C1 also is connected to capacitor C 7 and diode D7; diode D7 is connected to capacitor C 7 upper ends; remain unchanged and make D7 be added with reverse voltage by voltage after the dividing potential drop electrochemical capacitor C1 filtering of resistance R 1, R3, D7 is ended, inoperative to the operate as normal of circuit.
4. bushing type electric ballast magnetic induction protective device according to claim 3; it is characterized in that; described electric ballast also comprises the series resonant circuit of mainly being made up of triode Q1, Q2, impedance L5, L6 and capacitor C 9; triode Q1 is connected with magnet ring T1; the emitter of triode Q1 links to each other with the collector electrode of triode Q2; be connected with a triode Q4 on the base stage of triode Q2, the collector electrode of triode Q4 links to each other with 6 pin of magnet ring T1 by resistance R 9.
5. bushing type electric ballast magnetic induction protective device according to claim 4; it is characterized in that; described diode D5 also is connected to capacitor C 10; the starting resistor of protective circuit is that the secondary 1-2 feel of magnetic induction inductance T3 answers voltage to be higher than 12V; this voltage is through diode D5 rectification; after capacitor C 10 filtering; voltage-stabiliser tube Z1 is punctured; trigger controllable silicon Q3 conducting; voltage after the Q3 conducting directly is added in the base stage of triode Q4; make the Q4 conducting, by the Q4 short circuit, Q2 ends because of no feedback voltage the feedback signal of magnet ring 6 pin through R9; the conducting resistance R1 of while controllable silicon Q3; the dividing point of R3 also descends; capacitor C 7 two ends also because of the access of diode D7 is clamped at low pressure, make DB3 can not get trigger voltage, triode Q1; Q2 also with regard to all by and quit work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100246737A CN102163833A (en) | 2011-01-21 | 2011-01-21 | Extension-type electrical ballast magnetic induction protector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100246737A CN102163833A (en) | 2011-01-21 | 2011-01-21 | Extension-type electrical ballast magnetic induction protector |
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| CN2011100246737A Pending CN102163833A (en) | 2011-01-21 | 2011-01-21 | Extension-type electrical ballast magnetic induction protector |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2080291U (en) * | 1991-01-09 | 1991-07-03 | 尤一心 | Electronic ballast with overcurrent protective function |
| CN2269691Y (en) * | 1996-07-11 | 1997-12-03 | 黄甜仔 | Electronic ballast |
| CN101287323A (en) * | 2007-04-13 | 2008-10-15 | 苏州市昆士莱照明科技有限公司 | Auto-excitation type electronic ballast with over-temperature protection function |
| CN201957314U (en) * | 2011-01-21 | 2011-08-31 | 佛山市伟照业光电节能有限公司 | Magnetic induction protection device for extension-type electronic ballast |
-
2011
- 2011-01-21 CN CN2011100246737A patent/CN102163833A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2080291U (en) * | 1991-01-09 | 1991-07-03 | 尤一心 | Electronic ballast with overcurrent protective function |
| CN2269691Y (en) * | 1996-07-11 | 1997-12-03 | 黄甜仔 | Electronic ballast |
| CN101287323A (en) * | 2007-04-13 | 2008-10-15 | 苏州市昆士莱照明科技有限公司 | Auto-excitation type electronic ballast with over-temperature protection function |
| CN201957314U (en) * | 2011-01-21 | 2011-08-31 | 佛山市伟照业光电节能有限公司 | Magnetic induction protection device for extension-type electronic ballast |
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Application publication date: 20110824 |