CN2569508Y - Trigger start circuit of energy saving lamp ballast - Google Patents
Trigger start circuit of energy saving lamp ballast Download PDFInfo
- Publication number
- CN2569508Y CN2569508Y CN 02249262 CN02249262U CN2569508Y CN 2569508 Y CN2569508 Y CN 2569508Y CN 02249262 CN02249262 CN 02249262 CN 02249262 U CN02249262 U CN 02249262U CN 2569508 Y CN2569508 Y CN 2569508Y
- Authority
- CN
- China
- Prior art keywords
- trigger
- trigger tube
- ballast
- saving lamp
- lamp ballast
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a trigger start circuit of an energy saving lamp ballast, which comprises a trigger tube of which the back end is connected with a base of a triode at the negative end of the ballast. The utility model is characterized in that the utility model also comprises an isolating capacitor and a discharge resistor, wherein one end of the isolating capacitor is connected with the front end of the trigger tube, and the other end is connected with an anode of a power supply; one end of the discharge resistor is connected with the common end of the front end of the trigger tube and the isolating capacitor, and the other end is connected with the midpoint of two triodes of the ballast. The utility model can effectively protect the trigger tube and the triodes.
Description
Technical field:
The utility model relates to a kind of trigger starting circuit of electricity-saving lamp ballast.
Background technology:
The common energy-saving lamp electric ballast is generally done the triggering source with the starting resistance conduct to trigger tube, this Starting mode is to the instructions for use height of trigger tube, and damage trigger tube easily, cause trigger tube to mislead simultaneously, and then triode is misleaded, had a strong impact on the duty ratio of switching circuit, made triode heating aggravation, the safety of serious harm triode.
Summary of the invention:
The purpose of this utility model is exactly in order to overcome the above problems, and a kind of trigger starting circuit of electricity-saving lamp ballast is provided, and improves the reliability of electricity-saving lamp, electric ballast.
The utility model realizes that the scheme of above-mentioned purpose is: a kind of trigger starting circuit of electricity-saving lamp ballast, comprise trigger tube, thereafter the base stage of termination ballast negative terminal triode, it is characterized in that: also comprise isolation capacitance, discharge resistance, the front end of described isolation capacitance one termination trigger tube, another termination positive source, the front end of discharge resistance one termination trigger tube and the common ends of isolation capacitance, the mid point of two triodes of another termination ballast.
Adopt the beneficial effect of above scheme: the beneficial effect that adopts above scheme: because in a flash in energising, as long as the discharge resistance resistance on the discharge loop just can effectively be protected trigger tube much smaller than the impedance of trigger tube.After starting simultaneously, because the effect and the direct current of isolation capacitance are isolated substantially, have only the AC signal of local frequency to flow through on the trigger tube, its amplitude is much smaller than the turn-on voltage of trigger tube, and trigger tube is in cut-off state fully.Basic not interference on the transistor base, thus make triode obtain excellent protection.
Description of drawings:
Fig. 1 is existing trigger starting circuit schematic diagram.
Fig. 2 is the utility model schematic diagram.
Fig. 3 is the schematic diagram that the utility model is used for energy-saving lamp circuit.
Embodiment:
Also in conjunction with the accompanying drawings the utility model is described in further detail below by specific embodiment.
Fig. 1 is the available circuit schematic diagram, and the shortcoming of this circuit as mentioned above.Fig. 2 is the utility model schematic diagram.As seen from the figure, it is to change the resistance on the trigger starting circuit of the trigger tube DB3 in the available circuit into the isolation capacitance C4 (front end of described isolation capacitance C4 one termination trigger tube DB3 between the 0.00683-0.00472 μ F, another termination positive source), and change the diode on the capacitor discharge loop into 1 680K discharge resistance R1 (front end of discharge resistance R1 one termination trigger tube DB3 and the common ends of isolation capacitance C4, the mid point of two triodes of another termination ballast), cancel the electric capacity that negative supply joins.
The value of above-mentioned isolation capacitance C4, discharge resistance R1 is following consideration: the capacity that replaces the isolation capacitance C4 of resistance on the existing start-up circuit is unsuitable excessive, also unsuitable too small, with the duty ratio time constant of debugging should be consistent, generally value is between 0.00683-0.00472UF.The resistance resistance of discharge resistance R1 should be much smaller than the impedance of trigger tube DB3 when discharge.
State as preceding, because in a flash in energising, the discharge resistance R1 on the discharge loop＜＜trigger tube DB3 impedance, effectively protected trigger tube DB3.After starting simultaneously, trigger tube DB3 goes up because the effect and the direct current of electric capacity are isolated substantially, has only the AC signal of local frequency to flow through, and its amplitude is much smaller than the turn-on voltage of trigger tube DB3, and trigger tube DB3 is in cut-off state fully.Basic not interference on the transistor base, thus make triode obtain excellent protection.
Claims (3)
1. the trigger starting circuit of an electricity-saving lamp ballast, comprise trigger tube (DB3), thereafter the base stage of termination ballast negative terminal triode, it is characterized in that: also comprise isolation capacitance (C4), discharge resistance (R1), the front end of described isolation capacitance (C4) termination trigger tube (DB3), another termination positive source, the front end of discharge resistance (R1) termination trigger tube (DB3) and the common ends of isolation capacitance (C4), the mid point of two triodes of another termination ballast.
2. the trigger starting circuit of electricity-saving lamp ballast as claimed in claim 1 is characterized in that: the capacity of described isolation capacitance (C4) is consistent with the duty ratio time constant of debugging.
3. the trigger starting circuit of electricity-saving lamp ballast as claimed in claim 1 or 2 is characterized in that: during discharge, the resistance of described discharge resistance (R1) is much smaller than the impedance of trigger tube (DB3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02249262 CN2569508Y (en) | 2002-09-20 | 2002-09-20 | Trigger start circuit of energy saving lamp ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02249262 CN2569508Y (en) | 2002-09-20 | 2002-09-20 | Trigger start circuit of energy saving lamp ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2569508Y true CN2569508Y (en) | 2003-08-27 |
Family
ID=33719724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02249262 Expired - Fee Related CN2569508Y (en) | 2002-09-20 | 2002-09-20 | Trigger start circuit of energy saving lamp ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2569508Y (en) |
-
2002
- 2002-09-20 CN CN 02249262 patent/CN2569508Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |