CN2034761U - Adjustable light electronic ballast for fluorescent lamp - Google Patents
Adjustable light electronic ballast for fluorescent lamp Download PDFInfo
- Publication number
- CN2034761U CN2034761U CN 88211869 CN88211869U CN2034761U CN 2034761 U CN2034761 U CN 2034761U CN 88211869 CN88211869 CN 88211869 CN 88211869 U CN88211869 U CN 88211869U CN 2034761 U CN2034761 U CN 2034761U
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- China
- Prior art keywords
- fluorescent lamp
- ballast
- potentiometer
- frequency
- resistance
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Abstract
The utility model relates to a stepless adjustable light electronic ballast for the fluorescent lamp. The utility model is composed of a nonsaturnated self-excited oscillator, a superaudio ballast and a capacitor. The nonsaturnated self-excited oscillator is composed of a switch triode, a freewheeling diode, a trigger diode, an exciting transformer, a capacitor, a resistance, a potentiometer, etc. The oscillating frequency is regulated through the regulation of the resistance of the potentiometer RW. The electric current and the horse power of the fluorescent lamp tube are correspondingly varied by utilizing the different impedances of the superaudio ballast in each frequency, and then the stepless light regulation is realized. The utility model is matched with the fluorescent lamp tube which is smaller than 40 tiles, and regulates the brightness of the florescent lamp based on the requirement of the user at any time.
Description
The utility model relates to a kind of electronic ballast for fluoresent lamp of realizing stepless dimming, belongs to electronic technology field.
Inductance or the electronic fluorescent lamp ballast that uses all do not have dimming function at present.All lack dimming function as Chinese patent application number for two kinds of fluorescent lamp ballasts of CN86206622u and CN86200089u.In the actual use occasion of fluorescent lamp, particularly all kinds of fluorescent lamp desk lamps in use, often wish that it possesses dimming function, can regulate its brightness at any time according to user's different needs.
Task of the present utility model just is to provide a kind of fluorescent lamp stepless dimming electric ballast, both having had general electric ballast, not have stroboscopic, noiseless, priming speed fast, can improve the little advantage of luminous efficiency, mains fluctuations of fluorescent lamp greatly, can realize stepless dimming again, to adapt to different brightness users' needs.
The utility model is made up of various transistors, diode, oscillation transformer, superaudio ballast and various electric capacity, resistance, potentiometer and the wiring board thereof of housing and forming circuit, its major technique key is that light adjusting circuit is by transistor BG1, BG2, sustained diode 5, D6, driver transformer L1, fixed resistance R1～R4, capacitor C1～C3 and potentiometer Rw etc. form the unsaturation self-excited oscillator.The time constant of the firstorder circuit that its frequency of oscillation mainly is made of L13, R4 and Rw determines, changes the time constant of firstorder circuit by the resistance of regulator potentiometer Rw, to change its frequency of oscillation.And utilize of the impedance of superaudio ballast in variant frequency, and then change the electric current and the power of fluorescent tube, realize stepless dimming.Can be for＜supporting the use of 40W fluorescent tube.
Key technology ┈ unsaturation self-excited oscillator operation principle of the present utility model is as follows: (referring to accompanying drawing)
After mains switch K closure, 220 volts of civil powers are through D1～D4 rectification, and the direct voltage that obtains approximately+300 volts at the A point is as the power supply of electric ballast, and the intermediate point B point of C1, C2 is as the floating neutral point, at the direct voltage of+150 volts of B point acquisition pacts.
Because BG1, BG2 are in zero-bias, circuit can starting of oscillation.B point+150 volt voltage charges to C3 through Rw, R4, L13, R3, when the C3 terminal voltage reaches the D8 trigger voltage, D8 promptly applies a burst pulse to the BG2 base stage, make the BG2 conducting, the BG2 collector potential descends rapidly, voltage is applied to L13, R4 between the B-C point, Rw constitutes inductance resistance series connection firstorder circuit, and its electric current is pressed I=K(1-exp(-Rt/L)) change, voltage equation is
Therefore be T=0 in BG2 conducting moment, this series loop electric current I=0 then, L13 obtains whole voltages.By the L1 coupling, the voltage that induces at L12 makes BG2 keep conducting, and the voltage that induces at L11 ends BG1.As time goes on, this series loop electric current I rises gradually, R4, the corresponding rising of Rw terminal voltage, the L13 terminal voltage then descends, the also corresponding decline of the induced voltage of L12, L11, when the induced voltage of L12 was not enough to encourage BG2, BG2 began to end; Circuit overturns, and the back electromotive force that L13 produces is by the D5 afterflow, and the voltage that induces at L12 further ends BG2, the voltage that L11 induces makes the BG1 saturation conduction, thereby the current potential of BG2 collector electrode rises rapidly, and voltage is applied in L13, R4, the Rw series loop, in like manner between the A-B point, as time passes, this series loop I rises gradually, and R4, Rw terminal voltage rise, and the L13 terminal voltage then descends, when the L11 induced voltage was not enough to encourage BG1, BG1 began to end; The back-emf of L13 is by the D6 afterflow, and the induced voltage of L12 makes the BG2 conducting, and circulation so repeatedly forms stable oscillation stationary vibration.At the BG1 emitter, BG2 collector electrode output superaudio square wave is made the fluorescent lamp operation power supply.
After the oscillator starting of oscillation, the C3 terminal voltage is released through D7, BG2, can not set up D8 and trigger necessary voltage, thereby D8 quits work.
Upset takes place is not rely on iron core saturated for its oscillator from the above mentioned, but relies on the time constant of the single order inductance resistance circuit that L13, R4 and Rw constitute to determine frequency of oscillation, so regulates the Rw value and just can change time constant, makes the frequency of oscillation respective change.So it is stable to have frequency of oscillation, frequency adjustment is convenient, characteristics low in energy consumption.
The utility model realizes that the light modulation principle is as follows: (referring to accompanying drawing)
At above-mentioned unsaturation type self-excited oscillator BG2 collector electrode and B point, meet L2, C4 and fluorescent lamp P.When fluorescent lamp not before the build-up of luminance, the series connection of the filament of L2, C4 and fluorescent lamp P constitutes series resonant tank, and its frequency of oscillation and oscillator are approaching, so this loop has bigger electric current to pass through.Make filament pre-heating, produce higher resonance potential at C4 two ends simultaneously, make the fluorescent lamp build-up of luminance.Behind the fluorescent lamp build-up of luminance, L2 plays the operating current that fluorescent lamp is determined in the ballast effect, and C4 is as the bypass High-frequency Interference and prevent that the width of cloth of noise from penetrating.Because L2 presents different impedances at different frequency, frequency of oscillation changes thereupon when regulating Rw, and the also corresponding change of the calm electric current of L2 makes the fluorescent tube operating current that corresponding the variation be taken place, and then makes the power respective change of fluorescent tube, reaches the purpose of light modulation.
Housing available metal book of the present utility model plate punch forming or plastics, bakelite compression molding.Electronic component is all fixed in the circuit board, and wiring board is fixed on the housing, and potentiometer with switch is made as one in addition.
The utility model is compared with general electronics or inductance fluorescent lamp ballast, has the function that can regulate brightness of fluorescent lamp according to user's different needs at any time.Can traditionally be combined into the stepless light modulation florescent lamp tool with fluorescent light source novel energy-conserving with various, application potential is very big, also has remarkable energy saving effect.
One of embodiment of the present utility model is referring to accompanying drawing, and housing adopts the sheet metal punch forming, and wiring board adopts common single face copper-clad laminate to make, and various electronic component specific requirements are as follows shown in the accompanying drawing:
Element title model specification
Switching transistor BG1, BG2 MJE 13003
Rectifier diode D1～D4 1N4004 1A/400V
Sustained diode 5, D6 BA157 1A/400V
Damper diode D7 BYF407 1A/400V
Diac D8 N413N △ V
BO〉=3V
Oscillation transformer L1 MXO-2000/E5
Superaudio ballast L2 MXO-1400/E7/2
Electrolytic capacitor C1, C2 CD111 10 μ/200V
Capacitor C 3 CL11 0.022 μ/63V
Capacitor C 4 CBB22 1500P/1600V
Fixed resistance R1, R2 RJ 100 Ω 1/8W
Fixed resistance R3 RTX 390K 1/8W
Fixed resistance R4 RJ 30K 1/2W
Potentiometer with switch Rw, K WTK-1A 100K
The described electron rectifier of present embodiment can be realized stepless dimming for the＜supporting use of 9W fluorescent tube.
Claims (1)
1, a kind of various transistors by housing and forming circuit, diode, oscillation transformer, electric capacity, resistance, the electronic ballast for fluoresent lamp that potentiometer and wiring board etc. thereof are formed, it is characterized in that by transistor BG1, BG2, sustained diode 5, D6, fixed resistance R1～R4, diac D8, driver transformer L1, potentiometer Rw, capacitor C1～C3 has formed the unsaturation self-excited oscillator, its frequency of oscillation is mainly by L13, the time constant of the firstorder circuit that R4 and Rw constitute is determined, change the time constant of firstorder circuit by the resistance of regulator potentiometer Rw, to change its frequency of oscillation, and utilize of the impedance of superaudio ballast at different frequency, and then the electric current and the power of change fluorescent tube, realize stepless dimming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88211869 CN2034761U (en) | 1988-06-07 | 1988-06-07 | Adjustable light electronic ballast for fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88211869 CN2034761U (en) | 1988-06-07 | 1988-06-07 | Adjustable light electronic ballast for fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2034761U true CN2034761U (en) | 1989-03-22 |
Family
ID=4845236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88211869 Withdrawn CN2034761U (en) | 1988-06-07 | 1988-06-07 | Adjustable light electronic ballast for fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2034761U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006056143A1 (en) * | 2004-11-29 | 2006-06-01 | Century Concept Ltd. | Electronic ballast with preheating and dimming control |
-
1988
- 1988-06-07 CN CN 88211869 patent/CN2034761U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006056143A1 (en) * | 2004-11-29 | 2006-06-01 | Century Concept Ltd. | Electronic ballast with preheating and dimming control |
| US7728528B2 (en) | 2004-11-29 | 2010-06-01 | Century Concept Ltd | Electronic ballast with preheating and dimming control |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |