CN2179688Y

CN2179688Y - Electronic neon lamp transformer preventing light pole inter crossing

Info

Publication number: CN2179688Y
Application number: CN 94201669
Authority: CN
Inventors: 邢金堂
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-01-22
Filing date: 1994-01-22
Publication date: 1994-10-12
Anticipated expiration: 2004-01-22

Abstract

The utility model relates to an electronic neon lamp transformer preventing light pole inter crossing. The electronic neon lamp transformer mainly comprises a protective circuit, a rectification circuit and an oscillating circuit. The utility model is characterized in that the numbers of turns of coupling windings L1 and L2 in an oscillating transformer T1 in the oscillating circuit are different. Because the numbers of turns of the coupling windings L1 and L2 of the oscillating transformer T1 in the utility model are unequal, two switch transistors are in unbalanced operating state; the voltage difference bretween the collector electrode and the emitter electrode of the two switch transistors is about 50V. Consequently, the generation of the phenomenon of 'light pole inter crossing' is effectively solved.

Description

Electronic neon lamp transformer preventing light pole inter crossing

The utility model relates to a kind of neon light that prevents and the electric neon light transformer of " light beam beading " phenomenon occurs.

For a long time, light neon light and continue to use a kind of iron core formula leakage transformer always, the power frequency civil power is risen to the 15KV high-tension electricity light fluorescent tube, its main weak point is power factor low (only being 0.29), weight is big, and it is comparatively heavy that volume also shows, and is not easy to on-the-spot installation etc.For solving above-mentioned weak point, the electric neon light transformer has appearred again recently, and this technology is to utilize the Switching Power Supply operation principle to produce vibration, and the high-frequency high-voltage that power frequency is become 20KHZ is lighted fluorescent tube.Its power factor has tangible power savings up to more than 0.95, and its weight also only has about one kilogram, and volume is also little, be convenient to install, and be the renewal product of traditional iron core formula leakage transformer.

But above-mentioned electric neon light transformer also exists following weak point at large; promptly the phenomenon (generally being referred to as " light beam beading ") that the similar globule flows appears in (when especially fluorescent tube is longer) regular meeting in neon light tube when lighting fluorescent tube, causes this new technology of electric neon light transformer to be difficult to be applied.

The purpose of this utility model provides a kind of neon light that prevents the electric neon light transformer of " light beam beading " phenomenon to occur with regard to being to overcome above-mentioned weak point of the prior art.

The purpose of this utility model can adopt following measure to realize:

Promptly change the coupling winding L 1 of oscillation transformer T1 in the oscillating circuit and the number of turn of L2, its number of turn is not waited.

The difference of the number of turn of coupling winding L 1 and L2 is preferably a circle among the oscillation transformer T1.

Because the coupling winding L 1 of oscillation transformer T1 and the number of turn of L2 do not wait in the utility model, make two switching transistors be in uneven operating state, its collector electrode → emitter voltage differs about 50V, produces thereby solved " light beam beading " phenomenon effectively.

The drawing of accompanying drawing is described as follows:

Fig. 1 is circuit theory diagrams of the present utility model.

Fig. 2 is a logic relation picture of the present utility model.

Fig. 3 is an outline drawing of the present utility model.

The utility model is done with detailed description below with reference to embodiment (accompanying drawing):

As shown in Figure 2, the utility model is powered to oscillating circuit (II) by bridge rectifier (I), oscillating circuit (II) provides sampling voltage to protective circuit (IV), is cut off the electricity supply by executive component when making protective circuit zero load, overload occur in circuit; The high-frequency current that oscillating circuit (II) produces is exported high-tension electricity and is lighted neon light tube after secondary the boosting of step-up transformer (III).

Figure 1 shows that circuit theory diagrams of the present utility model.Do to describe below in conjunction with accompanying drawing:

Civil power is located to insert by AA ', through bridge rectifier D2-5 full-wave rectification, provides the direct current of about 260V after C4, the C5 filtering to oscillating circuit; R3, C6 and D6 form start-up circuit, direct current is charged to when being enough to make the D6 conducting to C6 through R3 and makes it conducting to pulse of switching tube VT2 output, when the VT2 conducting, the winding N1 of step-up transformer T2 and the feedback winding L 3 of oscillation transformer T1 have electric current to pass through, because L3, L1 induced electromotive force on the T1 make the VT1 saturation conduction, VT2 ends; Electric current is through the sense of current and the current opposite in direction of N1 and L3 at this moment, and L3 and L2 induce reverse electromotive force, and the VT1 of former saturation conduction is ended, and the former VT2 that ends becomes saturation conduction, forms vibration, and its frequency is about 20KHZ; High-frequency current is used for lighting neon light tube by the high pressure that BB ' locates to export about 15KV after the secondary N2 of T2 boosts; After circuit entered the positive feedback vibration, start-up circuit was no longer worked.Wherein R7 is used for absorption peak voltage; R4,5 provides offset operation voltage to VT1,2, D7, the 8th, and the protection diode, C1 is provided with for preventing that power supply from disturbing; when the neon light operate as normal, respectively get half of 260V voltage between " c, e " utmost point of VT1,2 liang of pipes.

In protective circuit; R1, D1, C2, R2 form the halfwave rectifier bleeder circuit; the C point is (A ') about 190V over the ground; L4 forms the signal voltage of about 2V on the T1 magnet ring behind D9, C7 rectifying and wave-filtering; adjust R6(w) not conducting of Vs under normal circumstances; relay J K is failure to actuate, and the normally closed point of JK is connected on full-bridge input one and rectifies normal power supply.When neon lamp tube fracture or high-voltage line come off and when causing zero load, the L4 both end voltage raises, and delivers to Vs control utmost point D point current potential rising conducting through R6, Alternating Current Power Supply is cut off in the JK action, and main circuit quits work, and plays the effect of protecting transformer.When load increases the weight of, the D point current potential formation overload protection that also can raise.Adjust R6 numerical value repeatedly, can obtain the best protection state.

Oscillation transformer has been broken traditional manufacture method in the electric neon light transformer of the present utility model when making, and promptly all requires VT1,2 balance work in the prior art, and the number of turn of winding L 1, L2 also should be identical, and is general together around 2～5 circles.The utility model then changes the coupling winding L 1 of oscillation transformer T1 in the oscillating circuit and the number of turn of L2, and its number of turn is not waited, and L2 then is 2 circles when being 3 circles as L1.Because the number of turn of L1 is many, cause the VT1 vibration stronger than VT2, voltage is low between VT1 " c, e " like this, voltage height between VT2 " c, e ", about 110V between VT1 when direct current 260V " c, e ", the about 150V of VT2 " c, e ", thus overcome " light beam beading " phenomenon that exists in the prior art, and this is the place of key of the present utility model just also.

The utility model is through 500 hours post-installation review, uses normally, other anomaly do not occur.

Fig. 3 is a shape assumption diagram of the present utility model, and (1) is the housing that fire proofing is made among the figure, and (2) are aluminium alloy heat radiators, and (3) are safety boxs, and (4) are city's electric wiring terminals, and (5) are the high voltage supply porcelain knobs, and (6) are that leg is installed.

Claims

1, a kind of electric neon light transformer that prevents light beam beading, it mainly comprises protective circuit, rectification circuit and oscillating circuit is characterized in that: the number of turn of coupling winding L 1 and L2 is different among the oscillation transformer T1 in the oscillating circuit.

2, the electric neon light transformer that prevents light beam beading according to claim 1 is characterized in that: the difference of the number of turn of coupling winding L 1 and L2 is preferably a circle among the oscillation transformer T1.