CN202059156U - Electronic ballast abnormity protection circuit - Google Patents
Electronic ballast abnormity protection circuit Download PDFInfo
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- CN202059156U CN202059156U CN2011201818531U CN201120181853U CN202059156U CN 202059156 U CN202059156 U CN 202059156U CN 2011201818531 U CN2011201818531 U CN 2011201818531U CN 201120181853 U CN201120181853 U CN 201120181853U CN 202059156 U CN202059156 U CN 202059156U
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Abstract
The utility model discloses an electronic ballast abnormity protection circuit, comprising an electronic ballast work circuit, a lamp filament loop formed by lamp tubes, a voltage sampling circuit, a triode regenerative feedback loop, a trigger circuit connecting the work circuit with the triode regenerative feedback loop, and a maintaining circuit connecting the lamp filament loop with the triode regenerative feedback loop. When the lamp tube is in an abnormal state, the voltage sampling circuit sends a signal to enable the triode regenerative feedback loop to be conductive, the triode regenerative feedback loop enables the work circuit to be cut off through the trigger circuit, and the conduction state of the triode regenerative feedback loop is maintained by the conduction current provided by the lamp filament loop. The electronic ballast abnormity protection circuit employs a triode regenerative feedback loop, the conduction state of the triode regenerative feedback loop is maintained by the current provided by a lamp filament loop, and when the old lamp tube is replaced with the new one the lamp tube automatically lights up.
Description
Technical field
The utility model relates to a kind of charged abnormity protection circuit that changes electric ballast self-starting behind the fluorescent tube of realizing.
Background technology
Traditional fluorescent lamp inductance type ballast because low, the energy consumption of power factor is big, temperature rise, a large amount of valuable copper iron resources of consumption, and exists stroboscopic and noise, is now substituted by more advanced electric ballast.Electric ballast has High Power Factor, low energy consumption, low temperature rise, saves the advantage of copper iron resource, and does not have stroboscopic and noise, also can add functions such as light modulation, has been the main flow of illumination market at present.
When the fluorescent tube aging life-span at the end, can make electric ballast seriously transship heating and damaging, so electric ballast all has abnormity protection circuit usually.In that fluorescent tube is aging when dying of old age, abnormity protection circuit moves rapidly, electric ballast is closed avoid it to cause damaging because of the overload heating; After changing new fluorescent tube, electric ballast still can continue operate as normal; But before more renewing fluorescent tube, abnormity protection circuit need keep self-locking state always, starts the phenomenon of closing continuous repetition with abnormity protection circuit otherwise ballast can occur, cause fluorescent lamp bright repeatedly, go out.At present, this is the standard feature that standard compliant high-quality electric ballast possesses.Because the self-locking of abnormity protection circuit keeps, even fluorescent lamp can be not bright yet after more renewing fluorescent tube, need turn off the power supply of light fixture, spend 20-30 second removing the self-locking of abnormity protection circuit, energising once more, fluorescent lamp could normally be lighted.If be independent light fixture, turn off power supply behind the replace tubes and turn on light again, though there have inconvenience to influence to be limited.If in the place that the fluorescent lamp cluster uses, as office building, market, subway, sports ground, underground parking garage etc., a switch is being controlled tens light fixtures usually, only because of the maintain and replace of several fluorescent tubes, pairing tens light fixtures of this switch all will be extinguished, lighting once more, the clerical workforce is caused inconvenience, also is the weak point of present stage electric ballast existence.
Summary of the invention
Problem to be solved in the utility model is exactly the shortcoming at existing electric ballast, proposes a kind of charged abnormity protection circuit that changes electric ballast self-starting behind the fluorescent tube of realizing, more renew fluorescent tube after fluorescent lamp promptly light automatically, need not to turn off power supply and restart.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of electron ballast abnormality protective circuit, comprise the operating circuit of electric ballast, by filament loop and voltage sampling circuit that fluorescent tube is formed, it is characterized in that: also comprise the triode regenerative circuit, connect operating circuit and triode regenerative circuit circuits for triggering, be connected the holding circuit of filament loop and triode regenerative circuit; Under the abnormal condition of lamp tube state, described voltage sampling circuit sends signal and makes the conducting of triode regenerative circuit, the triode regenerative circuit disconnects operating circuit by circuits for triggering, and the conducting state of triode regenerative circuit is kept by the conducting electric current that filament loop provides.
Pull down that filament loop disconnects behind the old fluorescent tube, the no longer conducting of triode regenerative circuit promptly automatically terminates guard mode, just can light automatically after this stylish fluorescent tube is changed, and realizes the charged electric ballast self-starting function behind the fluorescent tube that changes.
Further, described voltage sampling circuit comprises first inductance, first diode, second diode, first resistance, second resistance, the 3rd resistance, electrochemical capacitor, the voltage-stabiliser tube that connects successively; The elementary connection filament loop of described first inductance, first diode and second diode are connected in parallel on first inductance secondary.
Further, described triode regenerative circuit comprises first triode and second triode, and the C pin that the B pin of first triode connects the C pin of second triode, first triode connects the B pin of second triode.
Further, described circuits for triggering are made up of the 3rd diode that is connected in series and the 4th diode; The 3rd diode connects the triode regenerative circuit, and the 4th diode inserts the operating circuit of electric ballast.
Further, described holding circuit is made up of second inductance and the 4th resistance, elementary connection first inductance of described second inductance elementary, and the 4th resistance is connected between the 4th diode in the secondary and circuits for triggering of second inductance.
The beneficial effects of the utility model: traditional abnormity protection circuit adopts not conducting of controllable silicon under the ghyristor circuit normal operating conditions usually; When the abnormal condition of lamp tube state; the sample circuit output signal triggers the controllable silicon conducting and closes electric ballast; because controllable silicon has the self-sustaining characteristic; guard mode is kept by self-locking under powering state; change the also still self-locking maintenance of new fluorescent tube even pull down old fluorescent tube; cut off the power supply and removed self-locking in tens seconds and switch on, fluorescent lamp just can be lighted.But abnormity protection circuit provided by the utility model adopts the triode regenerative circuit; its conducting state is kept by the electric current that filament loop provides; old fluorescent tube is changed, new fluorescent tube can be lighted after changing automatically; this function brings great convenience for illumination installation, debugging and maintenance; especially be applied in the cluster illuminator; beneficial effect fruit is particularly evident, has avoided turning off power supply and extinguishes trouble and the inconvenience that a bank light is lighted again.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further:
Fig. 1 is a fundamental diagram of the present utility model;
Fig. 2 is a circuit diagram of the present utility model.
Embodiment
With reference to Fig. 1, a kind of electron ballast abnormality protective circuit of the utility model, the filament loop 2 of comprise the operating circuit 1 of electric ballast, forming by fluorescent tube and voltage sampling circuit 3, triode regenerative circuit 4, connect operating circuit 1 and triode regenerative circuit 4 circuits for triggering 5, be connected the holding circuit 6 of filament loop 2 and triode regenerative circuit 4; Under the abnormal condition of lamp tube state, described voltage sampling circuit 3 sends signal and makes 4 conductings of triode regenerative circuit, triode regenerative circuit 4 disconnects operating circuit 1 by circuits for triggering 5, and the conducting state of triode regenerative circuit 4 is kept by the conducting electric current that filament loop 2 provides.
With reference to Fig. 2, the concrete structure of circuit diagram is as follows: voltage sampling circuit 3 comprises first inductance L 1, the first diode D1, the second diode D2, first resistance R 1, second resistance R 2, the 3rd resistance R 3, electrochemical capacitor E, the voltage-stabiliser tube DZ that connects successively; Elementary connection filament loop 2, the first diode D1 of described first inductance L 1 and the second diode D2 are connected in parallel on first inductance L 1 secondary;
Triode regenerative circuit 4 comprises the first triode Q1 and the second triode Q2, and the B pin of the first triode Q1 connects the C pin of the second triode Q2, the C pin of the first triode Q1 connects the B pin of the second triode Q2;
Circuits for triggering 5 are made up of the 3rd diode D3 that is connected in series and the 4th diode D4; The 3rd diode D3 connects the operating circuit 1 that triode regenerative circuit 4, the four diode D4 insert electric ballast.
Holding circuit 6 is made up of second inductance L 2 and the 4th resistance R 4, elementary connection first inductance L 1 of described second inductance L 2 elementary, and the 4th resistance R 4 is connected between the 4th diode D4 in the secondary and circuits for triggering 5 of second inductance L 2.
Operation principle:
When the abnormal condition of lamp tube state, as fluorescent tube is aging can't starter, light tube electric voltage is higher than normal value, this moment, first inductance L 1 was through the first diode D1, the second diode D2, first resistance R 1, second resistance R 2, the voltage that the 3rd resistance R 3 forms at electrochemical capacitor E is greater than the voltage stabilizing value of voltage-stabiliser tube DZ, the conducting of voltage-stabiliser tube DZ, then make the first triode Q1 conducting, the C pin current potential of the first triode Q1 reduces makes the second triode Q2 conducting, make the further conducting of triode Q1 of winning after the second triode Q2 conducting, the first triode Q1 and the mutual positive feedback of the second triode Q2 cause two to manage all saturation conductions.
After 4 conductings of triode regenerative circuit, on the one hand close the 3rd triode Q3 in the operating circuit 1 by the 3rd diode D3, electrochemical capacitor E, the 3rd resistance R 3, electric ballast quits work; By the 4th diode D4 the electric charge of the thin-film capacitor C in the operating circuit 1 is discharged on the other hand, avoid trigger tube to start electric ballast once more.
After the 3rd triode Q3 closes, operating circuit 1 is in guard mode, at this moment electric current injects triode regenerative circuit 4 through two pins, the 6th resistance R 6, two pins of fluorescent tube right-hand member, first inductance L 1, second inductance L 2, the 4th resistance R 4, the 4th diode D4 of the 5th resistance R 5, fluorescent tube left end, keeps its saturation conduction state; Filament loop 2 promptly is made up of the pin and the 6th resistance R 6 of lamp tube ends.
Take off aging fluorescent tube; filament loop 2 disconnects and no longer provides the triode regenerative circuit 4 conducting electric currents; operating circuit 1 guard mode is removed; at this moment change new fluorescent tube; electric current is by the 5th resistance R 5, two pins of fluorescent tube left end, the 6th resistance R 6, two pins of fluorescent tube right-hand member, first inductance L 1, second inductance L 2,4 pairs of thin-film capacitor C chargings of the 4th resistance R; conducting voltage until surpassing trigger tube triggers the 3rd triode Q3 conducting ballast is reworked.
No matter be independent use; still locating cluster as office building, market, subway, sports ground, underground parking garage etc. uses; abnormity protection circuit is closed several light fixtures that electric ballast and self-locking extinguish and be need not outage; as long as take off aging old fluorescent tube simply and load onto new fluorescent tube, fluorescent lamp is promptly lighted automatically again.
Those skilled in the art can make various changes and distortion according to the utility model, only otherwise break away from spirit of the present utility model, all should belong to the defined scope of the utility model claims.
Claims (5)
1. electron ballast abnormality protective circuit, comprise the operating circuit (1) of electric ballast, by filament loop (2) and voltage sampling circuit (3) that fluorescent tube is formed, it is characterized in that: also comprise triode regenerative circuit (4), connect operating circuit (1) and triode regenerative circuit (4) circuits for triggering (5), be connected the holding circuit (6) of filament loop (2) and triode regenerative circuit (4); Under the abnormal condition of lamp tube state, described voltage sampling circuit (3) sends signal and makes triode regenerative circuit (4) conducting, triode regenerative circuit (4) disconnects operating circuit (1) by circuits for triggering (5), and the conducting state of triode regenerative circuit (4) is kept by the conducting electric current that filament loop (2) provides.
2. a kind of electron ballast abnormality protective circuit according to claim 1 is characterized in that: described voltage sampling circuit (3) comprises first inductance (L1), first diode (D1), second diode (D2), first resistance (R1), second resistance (R2), the 3rd resistance (R3), electrochemical capacitor (E), the voltage-stabiliser tube (DZ) that connects successively; The elementary connection filament loop (2) of described first inductance (L1), first diode (D1) and second diode (D2) are connected in parallel on first inductance (L1) secondary.
3. a kind of electron ballast abnormality protective circuit according to claim 2; it is characterized in that: described triode regenerative circuit (4) comprises first triode (Q1) and second triode (Q2), and the B pin of first triode (Q1) connects the C pin of second triode (Q2), the C pin of first triode (Q1) connects the B pin of second triode (Q2).
4. a kind of electron ballast abnormality protective circuit according to claim 3 is characterized in that: described circuits for triggering (5) are made up of the 3rd diode (D3) that is connected in series and the 4th diode (D4); The 3rd diode (D3) connects triode regenerative circuit (4), and the 4th diode (D4) inserts the operating circuit (1) of electric ballast.
5. a kind of electron ballast abnormality protective circuit according to claim 4; it is characterized in that: described holding circuit (6) is made up of second inductance (L2) and the 4th resistance; elementary connection first inductance (L1) of described second inductance (L2) elementary, the 4th resistance are connected between the 4th diode (D4) in the secondary and circuits for triggering (5) of second inductance (L2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201818531U CN202059156U (en) | 2011-05-31 | 2011-05-31 | Electronic ballast abnormity protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201818531U CN202059156U (en) | 2011-05-31 | 2011-05-31 | Electronic ballast abnormity protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202059156U true CN202059156U (en) | 2011-11-30 |
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ID=45019120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201818531U Expired - Lifetime CN202059156U (en) | 2011-05-31 | 2011-05-31 | Electronic ballast abnormity protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202059156U (en) |
Cited By (1)
| 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 |
-
2011
- 2011-05-31 CN CN2011201818531U patent/CN202059156U/en not_active Expired - Lifetime
Cited By (2)
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111130 Effective date of abandoning: 20131225 |
|
| RGAV | Abandon patent right to avoid regrant |