CN2333139Y - Electronic ballast of fluorescent lamp - Google Patents
Electronic ballast of fluorescent lamp Download PDFInfo
- Publication number
- CN2333139Y CN2333139Y CN 98216780 CN98216780U CN2333139Y CN 2333139 Y CN2333139 Y CN 2333139Y CN 98216780 CN98216780 CN 98216780 CN 98216780 U CN98216780 U CN 98216780U CN 2333139 Y CN2333139 Y CN 2333139Y
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- CN
- China
- Prior art keywords
- fluorescent lamp
- transformer
- winding
- circuit
- electronic ballast
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- 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 relates to an electronic ballast of a fluorescent lamp. The electronic ballast comprises a power supply rectifying and filter circuit and an oscillation output circuit which are arranged in an outer shell. A step-up transformer which provides working voltage and filament heating current for the fluorescent lamp is connected to the output circuit of the oscillation circuit. Compared with the prior art, the ballast has the advantages of easy start, reliable circuits and slow aging of the fluorescent lamp tube; the aging time of the fluorescent lamp tube is longer 5-10 times than the prior art.
Description
The utility model relates to electronic ballast for fluorescent lamp, especially includes the electronic ballast for fluorescent lamp of vibration output circuit.
Existing fluorescent lamp inductance type ballast is by its induced potential point fluorescent lamp, after fluorescent lamp is lighted, rely on line voltage to keep its conducting, the ballast of this structure is because fluorescent lamp no longer provides the starting voltage of high potential after lighting to fluorescent lamp, thereby have the long advantage of reliable operation, fluorescent lifetime, but it exists that the voltage adaptation scope is little, power consumption and the low defective of power factor (PF).Existing electronic ballast for fluorescent lamp is with its voltage adaptation wide ranges, energy-conservation and be used widely, but as " electronic ballast for fluorescent lamps " (patent announcement number: CN2117696U; The day for announcing: on September 30th, 1992) electronic ballast for fluorescent lamp of a class is by commercial power rectification, vibration are exported, and light by being connected in parallel on the resonance high-voltage that resonance obtains that resonant capacitance on the fluorescent lamp and inductance ballast coil form, to keep fluorescent lamp luminous, like this, during fluorescent lamp work, no matter starter or keep conducting, high voltage during the still potential starter of lamp tube ends, make the fluorescent lamp two ends bear the impact of alternation resonance high-voltage for a long time and fluorescent tube is turned black too early, shorten the useful life of fluorescent lamp.
The purpose of this utility model provides and a kind ofly can be when the fluorescent lamp conducting only provides electronic ballast for fluorescent lamp with the close voltage of supply power voltage amplitude to fluorescent lamp.
For achieving the above object, scheme of the present utility model is: it includes cased power supply rectification filter circuit, these parts similar to prior art of vibration output circuit, in addition, be connected with step-up transformer in the load of vibration output circuit, being provided with in the step-up transformer to fluorescent lamp provides the winding of operating voltage and provides the winding of heating current to filament of fluorescent lamp, is in series with the inductance ballast coil in the output loop of step-up transformer.
Preferably be in series with the inductance ballast coil in the input circuit of above-mentioned step-up transformer, with the stable oscillation stationary vibration electric current with slow down the impact of oscillating current to fluorescent tube; Also can be provided with switching circuit in the such scheme by electric power starting delay circuit control, this switching circuit and capacitances in series constitute auxiliary starter branch road, this branch road also is connected in step-up transformer and provides on the winding of voltage to the fluorescent lamp two ends, work as electric power starting, filament of fluorescent lamp is after preheating after a while, the auxiliary starter branch road of electric power starting delay circuit control is open-minded, electric capacity in the auxiliary starter branch road is connected with the inductance ballast coil, form resonance, thereby make daylight lamp glow starting, and behind daylight lamp glow starting, the electric power starting delay circuit then turn-offs auxiliary starter branch road; The preferably separated into two parts lattice coiling from the winding main winding that operating voltage is provided to the fluorescent lamp two ends of above-mentioned step-up transformer is to reduce the inductance value between the transformer coil and to slow down the impact of oscillating current to fluorescent tube.
Because adopt such scheme, the utility model compared with prior art has following advantage:
1, aging slow, the difficult burning of fluorescent tube.On the one hand, because after the fluorescent tube conducting, ballast is the high voltage when fluorescent lamp output starter no longer, keep conducting under that fluorescent lamp provides at step-up transformer, the close voltage with the line voltage amplitude, therefore, the fluorescent tube ageing time prolongs, and through contrast test (black circle occurring with lamp tube ends compares), can make the fluorescent tube ageing time than the long 5-10 of prior art doubly; On the other hand, because assisting the starter branch road and being connected in step-up transformer provides on the winding of voltage to the fluorescent lamp two ends, thereby resonance potential directly is not added on the filament at fluorescent tube two ends, the heavy current impact in the time of therefore can avoiding filament of fluorescent lamp to be subjected to starter and blowing.
2, starter is easy.Because during fluorescent start, ballast provides heating current to filament, therefore start easily; Adopt when assisting the starter branch road, during supply power voltage to 140 volt, but still starter is lighted fluorescent lamp; And when supply power voltage during greater than 180 volts, but also starter is lighted the fluorescent lamp of two ends fracture of wire.
3, circuit is reliable.Because the electric power starting delay circuit has cut off auxiliary starter branch road behind the fluorescent tube starter, can make the transistor of oscillating circuit avoid high-tension continuous impact.。
The utility model is described in further detail below in conjunction with the accompanying drawing example:
Fig. 1 is the utility model embodiment one electrical block diagram.
Fig. 2 is the partial circuit structural representation of the utility model embodiment two.
Among the embodiment one shown in Figure 1, diode D
1-D
4, capacitor C
1Constitute power rectifier and filter circuit, capacitor C
2-C
5, resistance R
1-R
4, diode D
6-D
9, triode Q
1-Q
2, core transformers B
1Be connected into the vibration output circuit, this circuit obtains power supply from above-mentioned power rectifier and filter circuit, and these parts are similar to prior art; In addition, be connected with step-up transformer B in the load of vibration output circuit
2Main winding n
1With with the inductance ballast coil L of this windings in series
1, during work, the triode Q in the vibration output circuit
1, Q
2In turn conducting and end step-up transformer B
2Main winding n
1Last acquisition alternating current, this transformer is the self coupling step-up transformer, winding n wherein
1-n
5The electromotive force of last acquisition provides operating voltage and the filament to fluorescent lamp two ends close with the supply power voltage amplitude that heating current is provided to the fluorescent lamp two ends respectively, wherein winding n
4, n
5For the winding of heating current is provided to filament, in the present embodiment, step-up transformer B
2Provide the winding of voltage and heater current to distinguish coiling to each end of fluorescent lamp, promptly with main winding n
1Mid point is the boundary, main winding n
1Half and winding n
2, n
4Be a lattice coiling, and main winding n
1Second half and winding n
3, n
5Be another lattice coiling, can reduce the inductance value between the transformer coil like this and slow down the impact of oscillating current fluorescent tube; At step-up transformer B
2On also be provided with a winding n in addition
6, this winding to one by diode D
16-D
20, resistance R
8-R
10, capacitor C
8-C
9, triode Q
3-Q
5The electric power starting delay circuit that is connected into provides power supply, and relay J is above-mentioned switching circuit, and it is controlled by the electric power starting delay circuit, its normally opened contact and capacitor C
6Series connection constitutes auxiliary starter branch road, and current-limiting resistance R is set in this branch road
5Control fluorescent tube the starter electric current, diode D is set
12-D
15With the breaking current that reduces the relay J normally opened contact, resistance R is set
6, R
7And capacitor C
7Constitute the arc-suppression circuit of relay J normally opened contact, auxiliary starter branch road also is connected in step-up transformer B
2Provide to the fluorescent lamp two ends on the winding of voltage, and be connected on step-up transformer B
2Inductance ballast coil L in the output loop
2Form the resonance branch road.When electric power starting, step-up transformer B
2Winding n
4, n
5Provide heating current to fluorescent lamp two ends filament respectively, simultaneously, the power supply in the electric power starting delay circuit passes through resistance R
10To capacitor C
9Charge, obtain the resistance R of power supply from the rectification output end of power rectifier and filter circuit
8Also to capacitor C
8Charging is through time-delay (allow filament of fluorescent lamp preheated one-section time after) in short-term, capacitor C
9On voltage raise and to cause triode Q
4-Q
5Conducting, relay J adhesive, auxiliary starter branch road are open-minded, capacitor C
6With inductance ballast coil L
2In the loop, produce resonance, capacitor C
6The resonance high-voltage at two ends is by step-up transformer B
2Voltage winding n
2, n
4And n
3-n
5, fluorescent lamp is punctured starter.Auxiliary starter branch road also is connected in step-up transformer B
2The winding n of voltage is provided to the fluorescent lamp two ends
2, n
4And n
3-n
5On, and be not directly parallel on the filament at fluorescent tube two ends the heavy current impact in the time of can avoiding the daylight filament to be subjected to starter and the disintegration of filament.After starter is finished, the capacitor C that is recharged
8Current potential raise and to cause triode Q
3Conducting, capacitor C
9On electromotive force by triode Q
3Collector and emitter discharge and reduce, triode Q
4Base potential reduce and to cause triode Q
4-Q
5By, relay J discharge, auxiliary starter branch road disconnects, at this moment to keep conducting luminous for the fluorescent lamp voltage close with the supply power voltage amplitude that relies on the voltage winding of step-up transformer to provide.Diode D is set in the circuit
16Be to prevent to vibrate output circuit to capacitor C
8Reverse charging and cause its time-delay undercharge, can not in time cut off auxiliary starter branch road after causing starter to be finished; Diode D is set in the circuit
5It is capacitor C when turning on light immediately after preventing to turn off the light
1Continuation influences the work of electric power starting delay circuit to circuit discharging.In addition, at the frequency conversion switching circuit to step-up transformer B
2Between circuit on and oppositely be connected with damper diode D respectively between the positive pole of power supply rectification filter circuit, negative pole
10, D
11, overheated with the triode of antihunt circuit, keep the working stability of oscillating circuit simultaneously.
Among the embodiment two shown in Figure 2, adopt step-up transformer B with former and deputy limit winding
3Replace the self coupling step-up transformer B among the embodiment one
2, its secondary winding n
1', n
2', n
3', n
4', n
5', n
6' identical with the winding structure of embodiment one, former limit winding n
0With inductance ballast coil L
1Series connection is as the load of vibration output circuit, and all the other structures are identical with embodiment one.
In other embodiments, switching circuit can then adopt non-contact switch circuit to replace the relay J of embodiment one.
Claims (5)
1, a kind of electronic ballast for fluorescent lamp includes cased power supply rectification filter circuit, vibration output circuit, it is characterized in that: be connected with step-up transformer (B in the load of described vibration output circuit
2), step-up transformer (B
2) in be provided with the winding (n that operating voltage is provided to fluorescent lamp
1-n
5) and the winding (n of heating current is provided to filament of fluorescent lamp
4, n
5), at step-up transformer (B
2) output loop in be in series with inductance ballast coil (L
2).
2, electronic ballast for fluorescent lamp according to claim 1 is characterized in that: described step-up transformer (B
2) input circuit in be in series with inductance ballast coil (L
1).
3, electronic ballast for fluorescent lamp according to claim 1 and 2 is characterized in that: it also is provided with the switching circuit by electric power starting delay circuit control, this switching circuit and electric capacity (C
6) auxiliary starter branch road that series connection constitutes, this branch road also is connected in step-up transformer (B
2) provide on the winding of voltage to the fluorescent lamp two ends.
4, according to claim 1,2 described electronic ballast for fluorescent lamp, it is characterized in that: described step-up transformer (B
2) from the winding main winding (n of operating voltage is provided to the fluorescent lamp two ends
1) upward separated into two parts lattice coiling.
5, electronic ballast for fluorescent lamp according to claim 3 is characterized in that: described step-up transformer (B
2) from the winding main winding (n of operating voltage is provided to the fluorescent lamp two ends
1) upward separated into two parts lattice coiling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98216780 CN2333139Y (en) | 1998-07-30 | 1998-07-30 | Electronic ballast of fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98216780 CN2333139Y (en) | 1998-07-30 | 1998-07-30 | Electronic ballast of fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2333139Y true CN2333139Y (en) | 1999-08-11 |
Family
ID=33969618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98216780 Expired - Fee Related CN2333139Y (en) | 1998-07-30 | 1998-07-30 | Electronic ballast of fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2333139Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104619062A (en) * | 2015-01-22 | 2015-05-13 | 宇帷国际股份有限公司 | Electronic device and circuit module thereof |
-
1998
- 1998-07-30 CN CN 98216780 patent/CN2333139Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104619062A (en) * | 2015-01-22 | 2015-05-13 | 宇帷国际股份有限公司 | Electronic device and circuit module thereof |
| CN104619062B (en) * | 2015-01-22 | 2017-06-23 | 英信科技有限公司 | Electronic installation and its circuit module |
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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 |