CN201029250Y - Static starter - Google Patents

Abstract

The utility model discloses a static open switch ware. A circuit consists of two serial diacs SCR1 and SCR2, and a diode D1. The utility model overcomes the problems that the existing open switch wares often produce relatively strong unwanted sound and hum noise, and are easy to go wrong due to gas leakage or contact burning.

Description

Static starter

Technical field

The utility model relates to a kind of starter, especially for the startup lighting device on the fluorescent lamp.

Background technology

The integrated circuit of present fluorescent lamp as shown in Figure 1.Its operation principle is: in the time of switch connection, supply voltage is added to the two poles of the earth of starter immediately by ballast and tube filament.220 volts voltage makes the ionized inert gas of starter immediately, produces glow discharge.The heat of glow discharge makes the bimetal leaf expanded by heating, the two poles of the earth contact.Electric current touches the utmost point by ballast, starter and the two ends filament constitutes path.Filament is very fast by current flow heats, launches a large amount of electronics.At this moment, because starter the two poles of the earth closure, two interpolar voltages are zero, and glow discharge disappears, and temperature reduces in the pipe; Bimetal leaf automatically resets, and the two poles of the earth disconnect.The moment that disconnects at the two poles of the earth, circuital current cuts off suddenly, and ballast produces very big self induction electromotive force, acts on the pipe two ends after superposeing with supply voltage.The a large amount of electronics that emit when filament is heated, under the lamp tube ends action of high voltage, with great speed by the low potential end to the high potential end motion.In the process of accelerated motion, argon molecules in the impact tube makes it rapid ionization.Heat is given birth in argon gas ionization, and heat makes mercury produce steam, and mercury vapor also is ionized thereupon, and sends strong ultraviolet ray.Excite down ultraviolet, the fluorescent material in the tube wall sends the visible light of substantial white.After fluorescent lamp is normally luminous.Because alternating current is the coil by ballast constantly, produce self induction electromotive force in the coil, the electric current that self induction electromotive force hinders in the coil changes, at this moment ballast plays the step-down current limliting, make current stabilization in the rated current scope of fluorescent tube, lamp tube ends voltage also is stabilized in the rated operational voltage scope.Because this voltage is lower than the ionization voltage of starter, also just no longer worked so be connected in parallel on the starter at two ends.This kind starter often produces stronger interference and hum, and breaks down easily, and reason is gas leakage or contact burning.

Summary of the invention

The utility model provides a kind of static starter, can replace original starter to pack in the original shell, because be not to utilize ionized inert gas, has overcome problems such as gas leakage.

The technical solution of the utility model is: a kind of static starter, comprise starter, and be composed in series by diode D1, the first diac SCR1 and the second diac SCR2.One and the present switching current of the starter identical function of usefulness can be provided.

When the amplitude of the applied voltage of diac surpasses the breakdown voltage of diac assembly, it will change to conduction state from locking, and being lower than breakdown voltage has and can recover blocking.Supply power voltage is depended in the selection of diac, and the diac of 28V can be used for the alternating current of 220V.

The beneficial effects of the utility model are: change the operation principle of existing starter, reach the effect of existing starter, overcome existing starter and often produced stronger interference and hum, and the problem that breaks down easily.

Description of drawings

Fig. 1 is prior art igniter circuitry figure;

Fig. 2 is the static igniter circuitry figure of the utility model.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figure 2, the static starter 10 of the utility model, circuit is composed in series with diac SCR1, SCR2 and a diode D1 of two series connection, is connected in parallel on the fluorescent tube that need light after the capacitor C 1 in parallel, and the switching current of and starter identical function can be provided.

Claims (1)

1. a static starter comprises starter (10), it is characterized in that, described starter (10) is composed in series by diode (D1), first diac (SCR1) and second diac (SCR2).

Images