CN2207684Y

CN2207684Y - Light regulating fluorescent lamp ballast

Info

Publication number: CN2207684Y
Application number: CN 94219302
Authority: CN
Inventors: 谢维福
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-08-18
Filing date: 1994-08-18
Publication date: 1995-09-13
Anticipated expiration: 2004-08-18

Abstract

The utility model relates to a brightness boosting type light regulating fluorescent lamp ballast, which is circuit device used for igniting and controlling an electric discharge lamp. The brightness boosting type light regulating fluorescent lamp ballast is composed of an input interference suppression circuit, a rectification circuit, an input over-voltage protection circuit, a control circuit, a boosting regulating circuit, an oscillating and exciting circuit, an output voltage display circuit, etc. A power supply is respectively connected with the rectification circuit and an input voltage sample circuit. The input voltage sample circuit is connected with a controlled silicon via the control and triggering circuit. The output of the rectification circuit and the output of the controlled silicon are connected with the boosting regulating circuit; the output of the boosting regulating circuit is respectively connected with the output voltage display circuit and the oscillating and exciting circuit. Because the over-voltage protection and the boosting regulation are adopted, the utility model not only can start brightness under low electric network voltage, but also can continuously regulate output voltage within a certain range to make a fluorescent lamp obtain normal lighting function.

Description

Light regulating fluorescent lamp ballast

The utility model relates to a kind of circuit arrangement that is used for discharge lamp igniting or control.

Because power supply grid voltage is on the low side and it is big to rise and fall, causes many areas to exist fluorescent lamp to be difficult to start or promptly enable to start but, the too little and problem of the illumination functions of can not bringing into normal play of luminous flux because of voltage is too low.Especially at peak times of power consumption at night and certain areas supply power voltage about 100V, contradiction is more outstanding.Electric ballast miscellaneous has appearred for this reason.

The CN87212090 patent disclosure a kind of electric ballast, comprise bridge rectifier and vibratory stimulation circuit, adopt push-pull circuit, and by in emitter circuit, sealing in diode, at base circuit and driving transformer secondary and connect diode and resistance after, reach the purpose of low-voltage starter and economize on electricity.

The inventor provides a kind of starter under low pressure in the CN91216445.X patent, can under low pressure make the fluorescent tube illumination functions of bringing into normal play again, the electric ballast that in wide-voltage range, is suitable for, it comprises codan, bridge-type/voltage doubling rectifing circuit, control circuit and vibratory stimulation circuit etc., and control circuit comprises decompression capacitor, low-voltage regulated power supply, input voltage sample circuit, circuits for triggering and bidirectional triode thyristor etc.

The purpose of this utility model be to provide a kind of can be at starter under the low-voltage, again can be under low-voltage improve its luminous flux and add lustre the type fluorescent lamp with what obtain to be equivalent to the normal voltage illuminating effect by manually regulating continuously.

The utility model comprises rectification circuit, input overvoltage protection and control circuit and vibratory stimulation circuit.Input overvoltage protection and control circuit thereof are made up of with circuits for triggering and bidirectional triode thyristor circuit low-tension supply, input voltage sample circuit, control; wherein power supply is connected with rectification circuit, input voltage sample circuit respectively, and the output of input voltage sample circuit connects the bidirectional triode thyristor circuit behind control and circuits for triggering.Other establishes boost regulating circuit and output voltage display circuit, and the output of rectification circuit and the output of ghyristor circuit connect the regulating circuit that boosts, and the output of the regulating circuit that boosts connects output voltage display circuit and vibratory stimulation circuit respectively.

The input of low-tension supply is connected to the output secondary winding of vibratory stimulation circuit, and the output of vibratory stimulation circuit is connected with external fluorescent tube.

With existing technology type seemingly, rectification circuit can be made up of bridge heap and filter capacitor, for the vibratory stimulation circuit provides the groundwork power supply.

Above-mentioned low-tension supply can adopt and add secondary winding at vibratory stimulation circuit output ballast coil and take out the pulse power and form through rectification, filtering, voltage stabilizing.

The regulating circuit that boosts is a manual adjustments, is made up of bidirectional triode thyristor and circuits for triggering thereof, and these circuits for triggering are made up of Resistor-Capacitor Unit, potentiometer and bidirectional diode, and it is regulated the result and is shown by the output voltage display circuit.

The input overvoltage protection is all used bidirectional triode thyristor with the regulating circuit that boosts, and is connected to after both series connection between the mid point of input point of rectifier bridge heap and two filter capacitors that are in series.

The vibratory stimulation circuit comprises stimulating module or thick film circuit, LC resonant tank and pliotron, and it is powered by rectifying output circuit, and the commutating voltage value is determined jointly by the operating state of the control circuit and the regulating circuit that boosts.

Rectifying output circuit can be established simple overvoltage crowbar, and it is made up of piezo-resistance and fuse tube.Simultaneously, the height of rectifier output voltage is shown by the output voltage display circuit, adds lustre dimming effect with reflection.

The utility model is owing to adopt the above-mentioned input overvoltage protection and the regulating circuit that boosts; thereby when line voltage is lower than a certain set point; the input voltage sample circuit will make control circuit output high level; the bidirectional triode thyristor triggering and conducting of protection usefulness; for the adjusting of boosting provides path to work with bidirectional triode thyristor, thereby rectifier output voltage is higher than the standard bridge rectifier.Regulator potentiometer will make output voltage raise, and change continuously within the specific limits, thereby cause fluorescent lamp to add lustre and luminous flux can change continuously.The situation of boosting is shown by the rectifier output voltage display circuit, can show brightness of fluorescent lamp " normally ", " on the low side ", " higher " three kinds of states.

But the utility model is the adapted trichromatic fluorescent light tube both, also can be used for straight tube shape " fluorescent lamp " pipe.Suitable voltage range is 80～240V.When input voltage in 140～190V scope, the level in the time of all can making luminous flux reach 220V by manual adjustments is well suited for low-voltage area and uses.

Fig. 1 is a block diagram of the present utility model.

Fig. 2 is the utility model circuit theory diagrams.

Fig. 3 is another kind of circuits for triggering schematic diagram.

Embodiment 1: as Fig. 1, the utility model is imported codan (1), rectification circuit (2), the regulating circuit that boosts (3), input overvoltage protection and control circuit (4～7) thereof, vibratory stimulation circuit (8), output voltage display circuit (9) etc. by power supply and is formed.Input overvoltage protection and control circuit thereof are made up of with circuits for triggering (6) and bidirectional triode thyristor (7) input voltage sample circuit (4), low-tension supply (5), control.Fluorescent tube T is sent in the output of vibratory stimulation circuit.

As Fig. 2, power supply input codan adopts transformer B.Required low-tension supply is to utilize the secondary winding (ab) of vibratory stimulation output to take out pulse voltage through D ₂Rectification, C ₂Filtering and D ₃Voltage stabilizing forms.D ₁, C ₁, R ₁And W ₁Form the input voltage sample circuit.The control circuit of protection circuit against input over-voltage is by IC ₁(NE555C) carry out IC ₁Be connected into the bistable state form.W ₁Be used to set up default protection magnitude of voltage, when input voltage is lower than preset value, IC ₁3 pin output high level, controllable silicon VS ₁Conducting, controllable silicon VS at this moment ₂Obtain path and devote oneself to work, by W ₂, C ₄And D ₆The triggering signal that provides makes VS ₂Obtain certain angle of flow.At VS ₂Of short duration conduction period, D ₅And C ₅, C ₆Constitute the circuit that is similar to the voltage multiplying rectifier form, so rectifier output voltage is higher than standard bridge rectifier voltage.Regulate W ₂This magnitude of voltage of scalable then reaches and not only adds lustre but also the purpose of light modulation.When input voltage is higher than predetermined value, IC ₁3 pin output low levels, VS ₁Because of disappearing, trigger current ends VS ₂Quit work because of path disconnects, rectification circuit becomes the standard bridge rectifier, and the vibratory stimulation circuit because of can not being protected in overvoltage.

R ₆, R ₇, R ₈With D ₇, D ₈, D ₉Form the output voltage display circuit, add lustre adjustment state with reflection.When output voltage is lower than rated value, A point current potential V among Fig. 2 _ABe higher than B point current potential V _B, green LED D ₈Luminous demonstration.When output voltage is higher than rated value, V _B＞V _A, red light emitting diodes D ₉Luminous demonstration.When output voltage is rated value, two light-emitting diode D ₈, D ₉All not luminous, with this as adding lustre the adjusting foundation.

Embodiment 2: as Fig. 3, with among Fig. 2 by IC ₁Change the bistable circuit of forming by two-stage transistor circuit Deng control and the circuits for triggering formed.When input voltage was lower than preset value, voltage stabilizing didoe ended, triode G ₄Emitter-base bandgap grading be in high level, thereby VS ₁Obtain trigger current and conducting makes the regulating circuit work of boosting.When input voltage was higher than preset value, the voltage stabilizing didoe conducting made G ₄Emitter-base bandgap grading be in low level, VS ₁End VS ₂Quit work, rectification circuit becomes the standard bridge rectifier, and circuit is protected.

Claims

1, adds lustre type fluorescent lamp ballast, comprise rectification circuit, input overvoltage protection and control circuit thereof, vibratory stimulation circuit, input overvoltage protection and control circuit thereof are made up of with circuits for triggering and bidirectional triode thyristor circuit low-tension supply, input voltage sample circuit, control, it is characterized in that power supply is connected with rectification circuit, input voltage sample circuit respectively, the output of input voltage sample circuit connects the bidirectional triode thyristor circuit behind control and circuits for triggering; Other establishes boost regulating circuit and output voltage display circuit, and the output of rectification circuit and the output of ghyristor circuit connect the regulating circuit that boosts, and the output of the regulating circuit that boosts connects output voltage display circuit and vibratory stimulation circuit respectively.

2, the type fluorescent lamp ballast that adds lustre as claimed in claim 1 is characterized in that the output secondary winding of the input termination vibratory stimulation circuit of low-tension supply.

3, the type fluorescent lamp ballast that adds lustre as claimed in claim 1, the regulating circuit that it is characterized in that boosting is made up of bidirectional triode thyristor and circuits for triggering thereof.

4, the type fluorescent lamp ballast that adds lustre as claimed in claim 1 is characterized in that the control circuit employing of protection circuit against input over-voltage is connected into bistable integrated circuit NE555C or two-stage transistor circuit.

5, the type fluorescent lamp ballast that adds lustre as claimed in claim 1 is characterized in that its input establishes power supply input codan.

6, the type fluorescent lamp ballast that adds lustre as claimed in claim 5 is characterized in that described power supply input codan is anti-tampering transformer.

7, the type fluorescent lamp ballast that adds lustre as claimed in claim 1 is characterized in that rectification circuit establishes the output over-voltage protection circuit.