CN2251860Y - Electronic pulse transformer for neon lamp - Google Patents

Abstract

The utility model relates to an electronic pulse transformer for a neon lamp, composed of a basic pulse signal oscillating circuit, an energizing and shaping circuit, a high-voltage pulse generating circuit, a feedback regulation circuit, a protection circuit, a low-voltage commutation filtering circuit and a commercial power commutation filtering circuit. The utility model is characterized in that the high-voltage pulse generating circuit is composed of switching circuit BG9, BG10 and a high-frequency boosting transformer B; because the on resistance of the switching circuits and the direct-current resistance of a coil are small, a high current can pass to realize the power output of more than 500VA; an output voltage is low and oppositely complete; the load capacity is 4-5 times as high as an ordinary transformer; one machine has multiple circuits, and the utility model can be operated with no load; the utility model is an upgraded and replaced product for the existing transformer for the neon lamp.

Description

The electronic impulse gas tube sign transformer

The utility model belongs to transformer, a kind of electronic impulse gas tube sign transformer.

Cored transformer of existing gas tube sign transformer and electronic transformer two classes, all there is following common weakness in they: have only one tunnel output, with 1～10 fluorescent tube of series connection form band 1.; 2. when the fluorescent tube number reduces, power factor will descend, and internal power consumption significantly increases; 3. output can not be opened a way; 4. output voltage height, more than 15000V, poor stability, the insulating requirements height is difficult for controlling at high-pressure side; 5. the advertising results for obtaining must increase number transformer, increase power consumption, and cost is significantly increased; 6. fluorescent tube and hostdown are difficult for judging.

The purpose of this utility model is a kind of transformer that can overcome the existing existing shortcoming of gas tube sign transformer of design.

The purpose of this utility model realizes by the design of following electronic impulse gas tube sign transformer; mainly producing circuit, feedback regulating circuit, protective circuit, lower pressure rectifier filter circuit, commercial power rectification filter circuit etc. seven by basic pulse signal oscillation circuit, pulse signal excitation and shaping circuit, high-voltage pulse partly forms; be characterized in: high-voltage pulse produces circuit; form by transistor switching circuit and high frequency transformer B; m1, m2 are the identical few circle particle size primary coil of the number of turn, and m is a multiturn particle size secondary coil.

Fig. 1 is the utility model circuit structure block diagram;

Fig. 2 is an electrical schematic diagram, also is embodiment;

Fig. 3 is multichannel output schematic diagram.

Each main components and parts model parameter is as follows among the embodiment:

IC ₁-NE555N, IC ₂-DG7078BD, IC ₃-DG7420, IC ₄-HD14069UPB, IC ₅-DG7420; BG ₁, BG ₂, BG ₄, BG ₁₂, BG ₁₄, BG ₁₅Be 9014 pipes, BG ₃, BG ₁₁, BG ₁₃, BG ₁₆Be 9015 pipes, BG ₆, BG _BBe 8050 pipes, BG ₅, BG ₇Be 8550 pipes, BG ₉, BG ₁₀Be BU508; D ₁, D ₃, D ₄, D ₅, D ₇, D ₁₃Its I＞1A, reverse voltage＞400V, D ₂Be detection tube, D ₆, D ₈, D ₁₀, D ₁₂Its I＞1A, reverse voltage＞800V, D ₉, D ₁₀Its I＞5A, reverse voltage＞400V, m1=m2=37 circle, Φ 0.9mm, m=290 circle, Φ 0.4mm, iron core are ferrite E shape, effective area 4Cm; M1 '=m2 ' ≈ 15 circles, Φ 0.9mm, iron core is a ferrite, effective area is less than 3cm.Be further described below in conjunction with Fig. 2:

1. basic pulse signal oscillation circuit.By IC ₁, IC ₂, IC ₃, IC ₄And peripheral cell is formed the oscillator signal of generation, its frequency regulated electrical road efferent duct BG ₃Control is from IC ₁3. pin output, through BG ₄Import JK flip-flop IC after swinging to respectively ₂1., pin and NAND gate IC ₃2., the pin, IC ₂, IC ₃With the basic pulse oscillator signal resolve into that two groups of waveforms are identical, 180 ° of phase phasic differences, frequency be the pulse signal of fundamental oscillation signal frequency 1/2nd, by IC ₃6., 8. pin outputs to six not gate IC ₄, from IC ₄4., 6. export one group, 8., 10. export one group, thereby finish the decomposition and the distribution of pulse, this circuit can output frequency be the pulse signal of 7000～27000Hz.

2. excitation shaping circuit.By BG ₅, BG ₇Current amplification circuit and BG ₆, BG ₃Shaping circuit is formed, through BG ₅, BG ₇Electric current after the amplification promotes BG respectively ₉, BG ₁₀, as shaping circuit BG ₆, BG ₃When conducting respectively, BG will be made respectively ₉, BG ₁₀Base stage clamped negative potential, be in off state.

3. high-voltage pulse produces circuit.Switching circuit BG ₉, BG ₁₀Alternately break-make makes the m1 of high frequency transformer B, m2 two ends produce the alternating electromagnetism field boundary, induces high-voltage pulse Um at coil m two ends, and wherein, coil m1 ', m2 ' are high frequency choke coil, and the inductance value of design is little, in order to filtering high frequency composition, D ₁₀, D ₁₂Play pressure limiting peak clipping effect.

4. regulating circuit.This circuit is subjected to the city's electric control after the rectification, BG ₁, BG ₂, BG ₃All design in amplification region work, so line voltage has determined the conductivity degree of three pipes, BG ₃Play the variable resistor effect that is subjected to city's electric control, thereby make base shake signal frequency with the line voltage respective change.

5. overcurrent-overvoltage under-voltage protecting circuit.By D ₁₃, C ₁₀, BG ₁₁, BG ₁₂, BG ₁₃, BG ₁₄, potentiometer W ₅, W ₆, the NAND gate ic chip ₅, relay J, BG ₁₅Controllable silicon SSR, BG ₁₆, potentiometer W ₇Form BG ₁₂Play the voltage sampling action, BG ₁₁, BG ₁₃Just often be in cut-off state at voltage, BG when overtension ₁₁Conducting makes BG ₁₄Its C utmost point of conducting is in electronegative potential, thus IC ₃3., 10. and IC ₅ also become electronegative potential, and IC ₃Output pin 6., 8. then be in high potential, make BG ₉, BG ₁₀End, simultaneously IC ₅The electronegative potential that 6. is in make BG ₁₅End, the contact of J disconnects, and finishes overvoltage protection.When voltage hangs down to certain value, BG ₁₃Conducting, its result and BG ₁₁Identical during conducting.Recover just often BG at voltage ₁₁Or BG ₁₃To transfer to by conducting and ending, make BG ₁₄Also end, withdraw from protection.Overcurrent protection.When operating current through overcurrent sample resistance R ₃₄When getting back to the commercial power rectification negative terminal, will be to BG ₁₆Base stage produce a negative pressure drop Ub, when electric current arrived certain value greatly, the Ub value will be greatly to making BG ₁₆Conducting, thereby triggering SSR conducting, IC at this moment ₃5., 9., IC ₅10. all be in electronegative potential (IC ₃5., 9. with 3., 10. function is identical, IC ₅9. with 10., the function is identical), IC ₃6., 8. be in high potential, BG ₉, BG ₁₀End, simultaneously IC ₅The electronegative potential that 6. is in make BG ₁₅End,, finish overcurrent protection so the J contact disconnects.

The utility model is because BG ₉, BG ₁₀Resistance is very little during conducting, and each coil D.C. resistance is also very little, can pass through big electric current so high-voltage pulse produces circuit, realizes bigger power output (greater than 500VA); Again since its output voltage than common transformer low (2000～2700V) and bigger output current ability, thus can a machine multichannel, ensure 40～50 fluorescent tubes; Can control every group of fluorescent tube break-make with a plurality of switches at high-voltage output end, provide very big convenience for the neon light complex pattern changes; But no-load running and carry out complete machine control can load or off-load power factor (PF) and efficient height suddenly; The fault of fluorescent tube and main frame and control switch assembly judges that easily these advantages have overcome the aforesaid all defect of prior art.

Claims (2)

1 electronic impulse gas tube sign transformer; form by casing and interior basic pulse signal oscillation circuit, pulse signal excitation and shaping circuit, high-voltage pulse generation circuit, feedback regulating circuit, protective circuit, lower pressure rectifier filter circuit, commercial power rectification filter circuit thereof, it is characterized in that high-voltage pulse produces circuit by BG ₉, BG ₁₀Switching circuit and high-frequency step-up transformer B form, and m1, m2 are the identical elementary winding of few circle particle size of the number of turn, and m is a multiturn particle size secondary winding.

2 electronic impulse gas tube sign transformers as claimed in claim 1 is characterized in that being provided with high frequency choke coil m1 ', m2 ' and pressure limiting peak-clipping circuit D10, D12 in the high-voltage pulse generation circuit.

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