How to connect the fluorescent lamp?
Fluorescent lamps are quite widespread in use as they have some advantages over glow lamps.
They are more economical in electric power consumption as spend energy for formation of heat less, they have more diffused light and there is the opportunity to choose the luminescence with the certain color though the most popular and running nevertheless are with the white luminescence.
As for specifics of their work, certain conditions are necessary for any fluorescent lamp or the fluorescent lamp. As they contain inert gas with mercury vapors - and as is well-known, gases are bad conductors of electric current, - their ignition requires high tension of breakdown.
Also for simplification of this ignition in the fluorescent lamp spiralk which when giving tension are heated become and facilitate the exit of electrons from metal of electrodes. Considering these conditions, simple connection to contacts of the fluorescent lamp of mains voltage will not go.
For this purpose once thought up very simple scheme on the throttle. In it all favorable conditions for implementation of ignition and further burning of the fluorescent lamp are combined. The throttle as you have to know, when giving on it alternating voltage is capable to limit current intensity at the expense of induced resistance. It is required to us for further maintenance of direct burning of the fluorescent lamp.
Still throttles are able to give big EMFs at the expense of the internal self-induction, but for this purpose it is necessary to create in the feed circuit short-term interruption in the form of short circuit and disconnection. It also provides one more element of the scheme under the name the starter.
And so, on the entrance of the scheme of the fluorescent lamp the mains voltage of 220 century moves. It passes through the throttle and arrives on the first spiralka of the lamp, from it passes to the starter and from it goes to the second spiralka with which arrives on the second plug of mains voltage. The first in this chain the starter works.
Tension of ignition of the glow discharge of the starter is less than mains voltage, but it is more than operating voltage of the lamp. Its internal contacts heat up and become isolated, thereby providing the current flow through lamp spiralk, heating them to temperature of 800-900 degrees. It allows to pass easier to start of the lamp.
After contacts of the starter cool down and are disconnected that gives the short-term impulse on the throttle, and it gives emission of high tension on electrodes of the fluorescent lamp, providing thereby breakdown and further burning. As for the connected capacity on the entrance, it is the surge filter for clearing of reactive power which is developed by the throttle. Without capacity the lamp will work too, but at the same time consuming more electric power from network.
In the first version of the scheme there is the inclusion of one lamp. In this case elements of the scheme will be such: if the lamp on 40 W, then and the throttle on 40 W, and the starter on voltage of 220 V (if the lamp one). At connection of two lamps to one throttle the general scheme already has option 2 appearance in our drawing. In this case the throttle on 40 W, and lamps on 20 W, the starter on tension on 127 V everyone. The condenser in the first and second option can be put on tension not less network, and the microfarad is better with the stock and capacity around 0:22.
The table (for the general acquaintance) compliances of elements of the scheme is included below (import component parts: lamps, the throttle, the starter and the condenser) and also are specified cases at which connection of two lamps on one throttle is possible.Top