CN2385419Y

CN2385419Y - High efficiency electronic power supply transformer for neon lamp

Info

Publication number: CN2385419Y
Application number: CN 99212693
Authority: CN
Inventors: 解士学; 孙林; 解景来
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-05-29
Filing date: 1999-05-29
Publication date: 2000-06-28
Anticipated expiration: 2009-05-29

Abstract

The utility model relates to a high efficiency electronic power supply transformer for a neon lamp, which can match the neon lamps with different lengths. The transformer is connected electrically with one end of a center tap connected with a filtering capacitor in series and a primary winding of a step-up transformer, and the other end is connected electrically with a mutual induction transformer which is provided with a protective winding. When the commercial power is turned on, a circuit is started up to work stably, and the neon lamp is lightened to illuminate normally.

Description

Efficient neon-light electronic power transformer

The utility model relates to a kind of ignition device of neon light, especially can make the neon light of different length accomplish the efficient neon-light electronic power transformer of rational Match.

Known, the gas tube sign transformer that does not also have at present series specification, most products only are the leakage transformers of 15000V, 30mA, this product is not only heavy, body is big, power consumption, poor efficiency, cost height, and give to install and use and brought a lot of inconvenience, this state of China's gas tube sign transformer is seriously fettering the development of neon light industry.Though the development of electronic transformer is carried out, only be rest on 2 to 6 meters a kind of, be difficult to accomplish to make it fluorescent tube rational Match with different length, different size.So not only waste resource, also shortened normal useful life, neon light is just broken down in early days, do not reached normal use.

The purpose of this utility model provides a kind of efficient neon-light electronic power transformer, and it can not only make the neon light operate as normal, and accomplishes and the fluorescent tube rational Match.

The purpose of this utility model is achieved in that

Series filtering capacitor mid point, step-up transformer, inductance transformer (magnet ring type) are electrically connected in turn.Behind power connection, two switching transistors are conductings in turn just, just induce suitable electric current and voltage step-up transformer secondary and light neon light, reach normal luminous purpose.

Owing to adopt such scheme, can make the neon light and the transformer rational Match of different size, different length, it is suitable for flexibly, electricity-saving high efficiency, with low cost.

Below in conjunction with accompanying drawing, the utility model is further specified:

Fig. 1 is a functional-block diagram

Fig. 2 is circuit theory diagrams

C1, C2 are filter capacitor among the figure, and B1 is step-up transformer (two winding L 5 and L6 are arranged), and B2 is inductance transformer (four winding L 1, L2, L3 and L4 are arranged).

Its operation principle is: civil power is through diode D1---after the D4 rectification, and by capacitor C 1 and C2 series filtering, Start-up circuit is by resistance R 3, R4, and capacitor C 4, double direction diode D8 form. Charging voltage on C4 reaches During the energy trigger voltage of double direction diode D8, the D8 conducting, transistor BG2 is thereupon conducting (high-frequency electrical at this moment also Stream is A---L5---L4 transistor BG2---power supply negative terminal) because the BG2 conducting, and then B2's Set up positive feedback voltage on the lower L1 of effect, (its high frequency electric is power positive end---BG1 to make transistor BG1 conducting---L4---L5---A point) under the inductance transformer effect, make again subsequently BG1 cut-off, BG2 conducting, as This moves in circles, and forms stable self-oscillation. Because L5 is the inductance main body of oscillating circuit, is again the transformation of boosting The primary coil of device B1 makes the required electric current and voltage of L6 output neon light light fluorescent tube and with it by electromagnetic induction Join. Capacitor C 5 is high-frequency absorption electric capacity, is used for absorbing the due to voltage spikes of BG1 and the moment generation of BG2 break-make. Two Level pipe D6, D7 play buffer action, and D9, D10 improve transistor functional reliability, resistance R 5, R6, R7, R8 For improving transistor work and further improving reliability and establish. The network that is made up of diode D11 and capacitor C 6 is Improving High voltage output improves neon light and lights a lamp effect and establish.

Holding circuit mainly by controllable silicon SCR, L2, diode D5, D6, voltage-stabiliser tube DW, resistance R 1, R2 and capacitor C 3 form. When the coupling fluorescent tube exceeds preseting length, corresponding equivalent resistance is increased, disconnected Load open circuit then appears in pipe, high pressure off-line, and the too high phenomenon of output voltage, i.e. overvoltage all appear in these several situations. Its The protection process is: when said process occurring, voltage also raises on the winding L 2 of inductance transformer B2, this voltage warp D5, DW, R1, when pressure drop reached the silicon controlled trigger voltage on R2, the SCR conducting made B point ground connection, The circuit failure of oscillation plays a protective role.

Realize that best way of the present utility model has two kinds:

The one, the element of electronic control circuit is contained on the circuit board, the independent embedding of step-up transformer, and with being contained in the insulation crust, elementary winding one end of step-up transformer is electrically connected with series filtering electric capacity mid point, the other end is electrically connected with inductance transformer.

The 2nd, step-up transformer is composed in series a use with two transformers, improve performance.

Claims

1, a kind of neon light efficent electronic power transformer; the high-frequency oscillating circuits of forming jointly by rectification circuit, filter circuit, start-up circuit, transistor switch, inductance transformer, protective circuit and step-up transformer; it is characterized in that: two filter capacitor series connection; in that DC power supply anode to two high frequency emitter---collector electrode is connected to high frequency absorption electric capacity; inductance transformer is provided with the protective circuit winding; draw lead at the mid point of series filtering electric capacity and be electrically connected with step-up transformer, step-up transformer is electrically connected with inductance transformer again.

2, efficient neon-light electronic power transformer according to claim 1, it is characterized in that: step-up transformer can be one, also can be that two transformers are connected into one.

3, according to claim 1,2 described efficient neon-light electronic power transformers, it is characterized in that: be connected to the diode capacitance network at the step-up transformer high-voltage output end.