CN100518429C - Protection electric circuit possessing a single short-circuit switch in electric stabilizer - Google Patents
Protection electric circuit possessing a single short-circuit switch in electric stabilizer Download PDFInfo
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- CN100518429C CN100518429C CNB2004100590734A CN200410059073A CN100518429C CN 100518429 C CN100518429 C CN 100518429C CN B2004100590734 A CNB2004100590734 A CN B2004100590734A CN 200410059073 A CN200410059073 A CN 200410059073A CN 100518429 C CN100518429 C CN 100518429C
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Abstract
The protection electric circuit includes a short-circuiting switch and a connecting circuit. The connecting circuit is cascaded to a set of filament of fluorescent tube electrically as well as connected to a start circuit and a short-circuiting switch electrically. When voltage on the tube exceeds a preset level, the short-circuiting switch is turned to on, and a maintaining current is generated to keep the short-circuiting switch at on state. The maintaining current also causes a high voltage winding in inverter of stabilizer to be shorted so as to stop generating AC high voltage outputted to the fluorescent tube. It is not needed to turn on or off power switch to make replacing fluorescent tube be started again automatically.
Description
Technical field
The protective circuit of the relevant a kind of electric stabilizer of the present invention.
Background technology
Relevant prior art, please referring to Fig. 1, it is to show United States Patent (USP) the 4th, 398, the control circuit 1 of the fluorescent lamp that is disclosed in No. 126 (Zuchtriegel) (this Figure 1 shows that two groups of fluorescent lamps 3 of tool and 3 ' preferred embodiment), it comprises that one has the push-pull oscillator circuit (as 18a and the 18b of Fig. 1) of two transistor Ts 1 and T2, one polyphone resonant circuit is (as 14 and 14 of Fig. 1 ', it respectively comprises one inductance element＜L1 and L1 '〉and one capacitor＜C1 and C1 ') be electrically connected this fluorescent lamp (3 and 3 ', it respectively comprises two groups of filament: 6,7 and 6 ', 7 '), one oscillatory trigger circuit (19 its comprise an inductance and an electric capacity) and two starters (111 and 111 ').During for the load (fluorescent tube) of avoiding removing fluorescent lamp; contact one is connected to the dangerous high pressure of pierce circuit and polyphone resonant circuit; provide one in this invention by the formed protective circuit 110 of semiconductor thyratron TH (thyristor), and by connecting at least one transistor (T1) of this protective circuit with this push-pull oscillator circuit of short circuit (18a and 18b).Relevant control energy is directly to be derived by a rectifier D1 and D1 ' institute by the high voltage source supply; and be connected to the inductance L 1 and L1 ' (as 14 and 14 of Fig. 1 ') of this polyphone resonant circuit, make the thyristor TH of this protective circuit 110 can obtain enough and reliably to switch energy.Its startup standard is to be connected to a voltage divider (R1 and R2) and also to be connected with the breakdown voltage of collapse element (as DIAC1) that its control voltage is provided by the high pressure of the polyphone resonant circuit (14) that comprises inductance (L1 with L1 ' etc.) by one to determine; It is also powered in response to this thyristor TH (thyristor) and gives this power supply supply capacitor C 3.When this fluorescent lamp (13 and 13 ') has a fluorescent tube to be removed or inefficacy or circuit produce a fault, cause this fluorescent tube to be removed, that is the load of this circuit is when being removed, then C3 begins to be recharged.And when the voltage of C3 is elevated to the breakdown voltage of DIAC1, promptly start thyristor TH.This moment, the base stage of transistor T 1 was blocked because of no longer receiving control energy, caused the energy of polyphone resonant circuit (14 and 14 ') to be eliminated.This moment, thyristor TH saw through the positive terminal 11 that a resistance R 3 is connected to the direct voltage supply, kept electric current and made this thyristor TH keep conducting to provide one, with the generation that prevents to vibrate.After foregoing circuit is made a response at this fault, have only the input power interruptions of rectifier and running power-supply unit 15 or the voltage shift that direct voltage is supplied positive terminal and negative pole end 11 and 12 removed the beginning energy this circuit is reset.
In the above-mentioned prior art, must close again after barrier is got rid of for some reason and can cut off this with the switch power supply switch beginning and keep electric current and make this thyristor become open circuit to reset this circuit; So relatively, it is more not convenient on manipulating.
Summary of the invention
Main purpose of the present invention is to provide the electric stabilizer protective circuit of the single short switch of a kind of tool (shutdown controlswitch) with a connecting circuit; and can reach the better simply relatively circuit structure of tool and in new fluorescent tube reinstall appropriate after, the mains switch that needn't turn-off and open this fluorescent lamp again can make this fluorescent lamp start automatically because of the conducting of electric current.
The protective circuit of the electric stabilizer of a single short switch of tool according to an aspect of the present invention and a connecting circuit, wherein should be used to export a direct current voltage by stable utensil one AC/DC converting circuit, one inverter (inverter) is electrically connected this AC/DC converting circuit in order to produce AC high voltage output to drive a fluorescent lamp, and one start-up circuit be used to start this inverter, this protective circuit is electrically connected this inverter, be used for when the voltage of the fluorescent tube of this fluorescent lamp surpasses a predetermined value, make this inverter stop a vibration to stop to produce this AC high voltage output, and change and to close and to open a mains switch of this fluorescent lamp behind this fluorescent tube and this fluorescent lamp is resetted automatically, it comprises: a short switch, its tool one control end is electrically connected this start-up circuit, one first end is electrically connected a common earth terminal with one second end, this first with this second end high-tension coil that is electrically connected this inverter in parallel; And one connecting circuit have one the 3rd end and one the 4th end, the 3rd end is electrically connected an output of this positive direct-current voltages of this AC/DC converting circuit, the 4th end is electrically connected this first end of this short switch, this connecting circuit is electrically connected in series one group of filament of this fluorescent lamp and is electrically connected this control end of this start-up circuit and this short switch, it is to be used for when this voltage of this fluorescent tube surpasses this predetermined value, make this short switch be switched on and produce one and keep electric current (holdingcurrent), make this short switch keep conducting state, and this high-tension coil that makes this inverter is stopped to produce this AC high voltage by short circuit and exports this fluorescent lamp to, and, this inverter is started automatically when a new fluorescent tube is replaced when appropriate.
According to above-mentioned conception, when a fault that is higher than this predetermined value when this voltage because of this fluorescent tube is removed this fluorescent tube, this connecting circuit produces one because of the polyphone that does not have this group filament is electrically connected and opens circuit, cause this to keep electric current and reduce to zero and this short switch thereby be turned off (turn-off), and when this new fluorescent tube is appropriate by device, one group of filament of this new fluorescent tube of cause and this connecting circuit are electrically connected in series this connecting circuit are switched on again, and the automatic conducting of this start-up circuit quilt that this connecting circuit is electrically connected is in order to start this inverter.
According to above-mentioned conception, this short switch be the combination that is electrically connected with a transistor seconds for a thyristor (SCR) and a first transistor one of them.
According to above-mentioned conception, this control end of this short switch is the grid for this SCR, and this first end is the anode for this SCR, and this second end is the negative electrode for this SCR.
According to above-mentioned conception, this first transistor is for a NPN transistor and this transistor seconds are to be a PNP transistor, and wherein a base stage of this NPN transistor and a collection utmost point are electrically connected with a base stage with the transistorized collection utmost point of this PNP respectively.
According to above-mentioned conception, this control end of this short switch is the connected node (connecting node) that this base stage for this NPN transistor is electrically connected with transistorized this collection utmost point of this PNP, this first end is to be the transistorized emitter-base bandgap grading of this PNP, and this second end is the emitter-base bandgap grading for this NPN transistor.
According to above-mentioned conception, this AC/DC converting circuit is to be a power factor correction (PFC) circuit and a bridge rectifier both one of them.
Protective circuit according to a kind of electric stabilizer of another aspect of the invention, wherein should stabilize utensil one AC/DC converting circuit, it has an output, one inverter has a high-tension coil and is electrically connected this AC/DC converting circuit has one group of filament with driving a fluorescent lamp, and one start-up circuit to start this inverter, this protective circuit is electrically connected this inverter, it comprises: a short switch circuit, its tool one control end is electrically connected this start-up circuit, one first end is electrically connected a common earth terminal with one second end, this first with this second end this high-tension coil that is electrically connected in parallel; And one connecting circuit have one the 3rd end and one the 4th end, the 3rd end is electrically connected this output of this AC/DC converting circuit, the 4th end is electrically connected this first end, and wherein this connecting circuit is electrically connected in series this group filament, and is electrically connected this start-up circuit and this control end.
According to above-mentioned conception, when the voltage of this fluorescent tube surpasses a predetermined value, this short switch is switched on and produces one and keeps electric current (holding current), make this short switch keep conducting state, and make this high-tension coil short circuit of this inverter and stop to produce an AC high voltage and export this fluorescent lamp to, and when changing a new fluorescent tube, this inverter is started automatically.
According to above-mentioned conception, this short switch be the combination that is electrically connected with a transistor seconds for a thyristor (SCR) and a first transistor one of them.
According to above-mentioned conception, this control end of this short switch is the grid for this SCR, and this first end is the anode for this SCR, and this second end is the negative electrode for this SCR.
According to above-mentioned conception, this first transistor is for a NPN transistor and this transistor seconds are to be a PNP transistor, and wherein a base stage of this NPN transistor and a collection utmost point are electrically connected with a base stage with the transistorized collection utmost point of this PNP respectively.
According to above-mentioned conception, this control end of this short switch is the connected node (connecting node) that this base stage for this NPN transistor is electrically connected with transistorized this collection utmost point of this PNP, this first end is to be the transistorized emitter-base bandgap grading of this PNP, and this second end is the emitter-base bandgap grading for this NPN transistor.
According to above-mentioned conception, this AC/DC converting circuit is to be a power factor correction (PFC) circuit and a bridge rectifier both one of them.
The electric stabilizer protective circuit of tool one short switch of the present invention (shutdown control switch) and a connecting circuit; the electric current of keeping in the present invention is the electrode of this fluorescent lamp tube of flowing through; so when this fluorescent tube hinders for some reason and is removed; make this keep current interruptions; can turn-off this inverter and make its failure of oscillations; and reinstall in new fluorescent tube can be because of the conducting of electric current after appropriate; and make the automatic conducting of this fluorescent lamp; needn't turn-off and open the mains switch of this fluorescent lamp again; be that it is when a fluorescent lamp tube voltage surpasses a predetermined value; to make this stabilizer stop to produce a high-tension electricity and export this fluorescent lamp to; and this fluorescent lamp that after changing fluorescent tube, resets automatically, have the protective circuit of relative simpler construction.Wherein the fluorescent lamp protective circuit has better simply structure, so relevant costs such as its manufacturing, transportation and storage are also relatively low.
Description of drawings
Fig. 1 shows the control circuit of a fluorescent lamp in the prior art and the circuit diagram of protective circuit;
Fig. 2 shows the circuit diagram of the single short switch electric stabilizer of the present invention's first preferred embodiment tool;
Fig. 3 shows the circuit of the single short switch electric stabilizer of the present invention's first preferred embodiment tool and the schematic diagram of a starting current Is;
Fig. 4 shows that the circuit and of the single short switch electric stabilizer of the present invention's first preferred embodiment tool keeps electric current I
HcSchematic diagram;
Fig. 5 shows the circuit and the one first discharging current I of the single short switch electric stabilizer of the present invention's first preferred embodiment tool
D1Schematic diagram;
Fig. 6 shows the circuit and the one second discharging current I of the single short switch electric stabilizer of the present invention's first preferred embodiment tool
D2, the electric current I that detours
BpWith a conducting electric current I
ToSchematic diagram;
Fig. 7 shows the circuit diagram of the single short switch electric stabilizer of the present invention's second preferred embodiment tool;
Fig. 8 shows the circuit diagram of the single short switch electric stabilizer of the present invention's the 3rd preferred embodiment tool;
Fig. 9 shows the circuit diagram of the single short switch electric stabilizer of the present invention's the 4th preferred embodiment tool; And
Figure 10 shows the circuit diagram of the single short switch electric stabilizer of the present invention's the 5th preferred embodiment tool.
Embodiment
As shown in Figure 2, it is for the circuit diagram of the single short switch electric stabilizer 2 of the present invention's first preferred embodiment tool.This electric stabilizer 2 comprises a power factor correction (PFC) circuit or a bridge rectifier 21, it is to be used to export a positive direct-current voltages 211 and a negative dc voltage 212, an inverter (inverter) 22, it is to be electrically connected this pfc circuit or a bridge rectifier 21, in order to produce AC high voltage output to drive a fluorescent lamp 3; (its one group of filament 31, resistance R 9, that comprises a resistance R 1, this fluorescent lamp starts capacitor C 6, a diac (DIAC) D2 and a mos field effect transistor (MOSFET) Q2 to one start-up circuit 23, please referring to this start-up circuit 23 shown in Figure 3 and a starting current I
SThe path) be used to start this inverter 22; And one protective circuit 24 (please referring to Fig. 4) be electrically connected this inverter 22, be used for when a voltage of a fluorescent tube 32 of this fluorescent lamp 3 surpasses a predetermined value, making this inverter 22 stop a vibration, to stop to produce this AC high voltage output; And change and to close and to open a mains switch of this fluorescent lamp 3 behind this fluorescent tube 32 and this fluorescent lamp 3 is resetted automatically.This protective circuit 24 comprises: a short switch 241 (Q3), its tool one control end are electrically connected this start-up circuit 23, one first end and are electrically connected a common earth terminal with one second end, this first with this second end high-tension coil T3C who is electrically connected this inverter 22 in parallel; And one connecting circuit 242 have one the 3rd end and one the 4th end, the 3rd end is electrically connected an output of this pfc circuit or a bridge rectifier 21 these positive direct-current voltages 211, the 4th end is electrically connected this short switch, and (it is a silicon control diode (SCR), also can be the combination that a NPN is electrically connected with the two-transistor of a PNP) this first end of 241, (it comprises this resistance R 1 to this connecting circuit 242, this group filament 31 of this fluorescent lamp, this resistance R 9 and a diode D3, please referring to Fig. 4) be electrically connected in series this group filament 31 of this fluorescent lamp 3 and be electrically connected this control end of this start-up circuit 23 and this short switch 241, it is to be used for making this short switch 241 be switched on and produce one and keeping electric current (holdingcurrent) I when this fluorescent tube 32 these voltages surpass this predetermined value
Hc, make this short switch 241 keep conducting states, and make this high-tension coil T3C of this inverter 22 be stopped to produce this AC high voltage to export this fluorescent lamp 3 to, and be replaced when appropriate when a new fluorescent tube 32 by short circuit, this inverter 22 is started automatically.
The operation principles of relevant above-mentioned first preferred embodiment, division as after.Please referring to Fig. 3, when this electric stabilizer 2 is activated, 211 pairs of these startup capacitor C 6 of this positive direct-current voltages are charged, when the magnitude of voltage of this startup capacitor C 6 reaches the breakdown voltage value (breakdown voltage) of this DIAC D2, one switch Q2 of this inverter 22 is switched on and forms a starting current Is (as shown in Figure 3), to start this fluorescent lamp 3.And being in normal operation state following time when this fluorescent lamp 3, this starts the magnitude of voltage on capacitor C 6, will form one first discharging current I because of seeing through a bypass diode (bypass diode) D1 and being switched on of this switch Q2
D1(the 1st discharging current) makes this startup capacitor C 6 be discharged to the electronegative potential of an approximate zero, and is maintained at this electronegative potential and is unlikely to this DIAC D2 of conducting once more (detailed as shown in Figure 5).
Please referring to Fig. 6, a fault that is higher than this predetermined value when this voltage because of this fluorescent tube 32 makes connected node (connecting node) the n1 place of this a group filament 31 and a resistance R 8 occur one when being higher than the ac voltage of normal value, then seeing through on the one hand the ac/dc voltage rectifier circuit that bleeder circuit that this resistance R 8 and a resistance R 10 formed and a diode D5, a resistance R 11 and a capacitor C 8 formed charges to this capacitor C 8, when the magnitude of voltage on this C8 is higher than the breakdown voltage value of this DIAC D6, will make this DIAC D6 conducting form an electric current I
To(turn-on current), and and then make this short switch Q3 be switched on.After this short switch Q3 is switched on, will impel with a high-tension coil T3C of its this inverter 22 that is electrically connected in parallel by short circuit and form the electric current I that detours
Bp(bypass current) flow through a diode D4 and this short switch Q3; The voltage that starts on the capacitor C 6 will form one second discharging current I
D2(the 2
NdDischarging current), flow through a diode D3 and this short switch Q3 and the (I that discharges
To, I
BpWith I
D2Detailed as shown in Figure 6) so that C6 is maintained at the electronegative potential of an approximate zero, and then makes these inverter 22 failures of oscillations and stop to produce this AC high voltage and export this fluorescent lamp 3 to.Keep conducting because of this short switch Q3 this moment, so make this positive direct-current voltages 211 keep electric current I to producing one between this short switch Q3
Hc, and (this keeps electric current I in conducting state to keep this short circuit to open Q3
HcBe flow through this connecting circuit 242 and this short switch 241 (Q3), know clearly as shown in Figure 4).See also Fig. 4, when this fluorescent tube 32 was removed, this connecting circuit 242 produced one because of the polyphone that does not have this group filament 31 is electrically connected and opens circuit, and causes this to keep electric current I
HcReduce to zero, and this short switch 241 thereby be turned off (turn-off); And when this new fluorescent tube 32 is appropriate by device, one group of filament 31 of this new fluorescent tube 32 of cause is electrically connected in series with this connecting circuit 242, and this connecting circuit 242 is switched on again, thereby make this start-up circuit 23 that is electrically connected with this connecting circuit 242 by conducting automatically (knowing clearly as shown in Figure 3), to start this inverter 22.
As shown in Figure 7, it is the circuit diagram for the single short switch electric stabilizer 2 of the present invention's second preferred embodiment tool; They are maximum different with first preferred embodiment, be that the capacitor C 7 in this first preferred embodiment is cancelled, change the mode (it is about the twice of former C1 capacitance) that strengthens the C1 capacitance of adopting, the principle all identical (seeing Fig. 7 for details) of all the other structures and its running with first preferred embodiment.
As shown in Figure 8, it is the circuit diagram for the single short switch electric stabilizer 2 of the present invention's the 3rd preferred embodiment tool; They are maximum different with first preferred embodiment, be that the capacitor C 1 in this first preferred embodiment is cancelled, change the mode (it is about the twice of former C7 capacitance) that strengthens the C7 capacitance of adopting, the principle all identical (seeing Fig. 8 for details) of all the other structures and its running with first and second preferred embodiment.
As shown in Figure 9, it is the circuit diagram for the single short switch electric stabilizer 2 of the present invention's the 4th preferred embodiment tool; They are maximum different with first preferred embodiment, are 2 points such as to be moved for the change of these fluorescent lamp 3 connected modes and this capacitor C 1/C7.One group of filament 31 of this fluorescent lamp 3 is to change into this positive direct-current voltages 211 being electrically connected with this resistance R 1 polyphone, and an end of this capacitor C 1 is to change into coupling with an inductance L 1 of this inverter 22 and the other end of C1 is to change into organizing filament 33 with another of this fluorescent lamp and this resistance R 8 couples mutually.So this starting current Is and this are kept electric current I
HcThis resistance R 1 of flowing through again behind this group filament 31 of all flowing through earlier, in addition the principle of all the other structures of the present invention's the 4th preferred embodiment and its running all with this first to the 3rd preferred embodiment identical (seeing Fig. 9 for details).
As shown in figure 10, it is the circuit diagram for the single short switch electric stabilizer 2 of the present invention's the 5th preferred embodiment tool; They are maximum different with first preferred embodiment, also are that the change of these fluorescent lamp 3 connected modes and this capacitor C 1/C7 such as are moved at 2 points.One group of filament 33 of this fluorescent lamp 3 is that an end that changes into this resistance R 8 and this capacitor C 1 couples, and the other end of C1 is that the inductance L 1 with this inverter 22 couples and another group filament 31 of this fluorescent lamp 3 then is to change into this resistance R 10 and this negative dc voltage 212 being electrically connected in series.So this starting current Is and this are kept electric current I
HcThe remainder of this resistance R 1 of flowing through earlier respectively and this start-up circuit 23 and this connecting circuit 242, this group filament 31 at last begins to flow through.In addition, the principle all identical (seeing Figure 10 for details) of all the other structures of the present invention's the 5th preferred embodiment and its running with this first to fourth preferred embodiment.
By above-mentioned explanation as can be known; the invention reside in the electric stabilizer protective circuit that a single short switch of a kind of tool and a connecting circuit are provided; and can reach the better simply relatively circuit structure of tool and in new fluorescent tube reinstall appropriate after, the mains switch that needn't turn-off and open this fluorescent lamp again can make this fluorescent lamp advantage such as startup automatically because of the conducting of electric current.
Therefore,, the present invention can make the change or the replacement of all equivalences by the personage who is familiar with this skill technology according to this even if being described in detail by the above embodiments, however the change of these equivalences or replace neither disengaging such as appended present patent application claim scope.
Claims (14)
1. the protective circuit of an electric stabilizer; wherein should be used to export a direct current voltage by stable utensil one AC/DC converting circuit; one inverter is electrically connected this AC/DC converting circuit in order to produce AC high voltage output to drive a fluorescent lamp; and one start-up circuit be used to start this inverter; this protective circuit is electrically connected this inverter; be used for when the voltage of the fluorescent tube of this fluorescent lamp surpasses a predetermined value; make this inverter stop a vibration to stop to produce this AC high voltage output; and change and needn't close and open a mains switch of this fluorescent lamp behind this fluorescent tube and this fluorescent lamp is resetted automatically, this protective circuit comprises:
One short switch, its tool one be electrically connected this start-up circuit control end, be electrically connected one first end and one second end of a common earth terminal, this first high-tension coil that is electrically connected this inverter with this second end parallel connection; And
One connecting circuit, it has one the 3rd end and one the 4th end, the 3rd end is electrically connected an output of this positive direct-current voltages of this AC/DC converting circuit, the 4th end is electrically connected this first end of this short switch, this connecting circuit is electrically connected in series one group of filament of this fluorescent lamp and is electrically connected this control end of this start-up circuit and this short switch, it is to be used for when this light tube electric voltage surpasses this predetermined value, make this short switch be switched on and produce one and keep electric current, make this short switch keep conducting state, and this high-tension coil that makes this inverter is stopped to produce this AC high voltage by short circuit and exports this fluorescent lamp to, and, this inverter is started automatically when a new fluorescent tube is replaced when appropriate.
2. protective circuit as claimed in claim 1; it is characterized in that when a fault that this voltage because of this fluorescent tube is higher than this predetermined value is removed this fluorescent tube; this connecting circuit produces one because of the polyphone that does not have this group filament is electrically connected and opens circuit; cause this to keep electric current and reduce to zero and this short switch thereby be turned off; and when this new fluorescent tube is properly installed; one group of filament of this new fluorescent tube of cause and this connecting circuit are electrically connected in series this connecting circuit are switched on again, thereby make the automatic conducting of this start-up circuit quilt that is electrically connected with this connecting circuit in order to start this inverter.
3. protective circuit as claimed in claim 1, it is characterized in that this short switch be the combination that is electrically connected with a transistor seconds for a thyristor and a first transistor one of them.
4. protective circuit as claimed in claim 3, this control end that it is characterized in that this short switch are the grids for this thyristor, and this first end is the anode for this thyristor, and this second end is the negative electrode for this thyristor.
5. protective circuit as claimed in claim 3; it is characterized in that this first transistor is for a NPN transistor and this transistor seconds are to be a PNP transistor, wherein a base stage of this NPN transistor and a collection utmost point are electrically connected with a base stage with the transistorized collection utmost point of this PNP respectively.
6. protective circuit as claimed in claim 5; this control end that it is characterized in that this short switch is the connected node that this base stage for this NPN transistor is electrically connected with transistorized this collection utmost point of this PNP; this first end is to be the transistorized emitter-base bandgap grading of this PNP, and this second end is the emitter-base bandgap grading for this NPN transistor.
7. protective circuit as claimed in claim 1 is characterized in that this AC/DC converting circuit is to be a circuit of power factor correction and a bridge rectifier both one of them.
8. the protective circuit of an electric stabilizer; wherein should stabilize utensil one AC/DC converting circuit; it has an output, an inverter has a high-tension coil and is electrically connected this AC/DC converting circuit has one group of filament with driving a fluorescent lamp; and one start-up circuit to start this inverter; this protective circuit is to be electrically connected this inverter, and it comprises:
One short switch circuit, its tool one control end to be being electrically connected this start-up circuit, one first end and second end being electrically connected a common earth terminal, this first with this second end this high-tension coil that is electrically connected in parallel; And
One connecting circuit has one the 3rd end and one the 4th end, and the 3rd end is electrically connected this output of this AC/DC converting circuit, and the 4th end is electrically connected this first end,
Wherein this connecting circuit is electrically connected in series this group filament, and is electrically connected this start-up circuit and this control end.
9. protective circuit as claimed in claim 8; it is characterized in that when the voltage of the fluorescent tube of this fluorescent lamp surpasses a predetermined value; this short switch is switched on and produces one and keeps electric current; make this short switch keep conducting state; and make this high-tension coil short circuit of this inverter and stop to produce an AC high voltage and export this fluorescent lamp to; and when changing a new fluorescent tube, this inverter is started automatically.
10. protective circuit as claimed in claim 8, it is characterized in that this short switch be the combination that is electrically connected with a transistor seconds for a thyristor and a first transistor one of them.
11. protective circuit as claimed in claim 10, this control end that it is characterized in that this short switch are the grids for this thyristor, this first end is the anode for this thyristor, and this second end is the negative electrode for this thyristor.
12. protective circuit as claimed in claim 10; it is characterized in that this first transistor is for a NPN transistor and this transistor seconds are to be a PNP transistor, it is characterized in that a base stage of this NPN transistor and a collection utmost point are electrically connected with a base stage with the transistorized collection utmost point of this PNP respectively.
13. protective circuit as claimed in claim 12; this control end that it is characterized in that this short switch is the connected node that this base stage for this NPN transistor is electrically connected with transistorized this collection utmost point of this PNP; this first end is to be the transistorized emitter-base bandgap grading of this PNP, and this second end is the emitter-base bandgap grading for this NPN transistor.
14. protective circuit as claimed in claim 8 is characterized in that this AC/DC converting circuit is to be a circuit of power factor correction and a bridge rectifier both one of them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100590734A CN100518429C (en) | 2004-07-27 | 2004-07-27 | Protection electric circuit possessing a single short-circuit switch in electric stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100590734A CN100518429C (en) | 2004-07-27 | 2004-07-27 | Protection electric circuit possessing a single short-circuit switch in electric stabilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1728914A CN1728914A (en) | 2006-02-01 |
| CN100518429C true CN100518429C (en) | 2009-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100590734A Expired - Fee Related CN100518429C (en) | 2004-07-27 | 2004-07-27 | Protection electric circuit possessing a single short-circuit switch in electric stabilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100518429C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101594725B (en) * | 2008-05-27 | 2013-03-13 | 大同股份有限公司 | Electronic stabilizer of single-stage fluorescent lamps |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4398126A (en) * | 1981-03-30 | 1983-08-09 | Patent-Truehand-Gesellschaft Fur Elektrische Gluhlampen Gmbh | Protected low-pressure discharge lamp operating circuit |
-
2004
- 2004-07-27 CN CNB2004100590734A patent/CN100518429C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4398126A (en) * | 1981-03-30 | 1983-08-09 | Patent-Truehand-Gesellschaft Fur Elektrische Gluhlampen Gmbh | Protected low-pressure discharge lamp operating circuit |
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| Publication number | Publication date |
|---|---|
| CN1728914A (en) | 2006-02-01 |
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