Monday, September 19, 2011

The capacitor.

capacitor schematic diagram
capacitor schematics
capacitor schematics 01
Two mutually gei'soleerde conductive surfaces form an electric capacitor. In Figure 40, these two surfaces or plates connected to the terminals of an alternator. Once we deploy the switch vioeit there for a very short time a small current through the chain, despite the two plates are isolated from each other. There is then the insulation a shift instead of electric particles. The capacitor is charged. "The board will also increase surface particles move more electricity, so a larger load to be included. A similar result is achieved by reducing the insulation thickness.
We break the connections to the alternator and we call in a galvanometer in series with the capacitor (Fig. 41), then swinging it zai, we once again close the switch circuit.
The capacitor discharges through the meter now. The discharge flow ends when the voltage between the two plates is zero again.
If the capacitor is connected to an alternating, will alternately charge and discharge location. The capacitor plates are alternately positive and negative. This puts the chain at a constant current, the direction changes. Thus it seems as if the AC condenser, but as previously shown, it does not pass DC. :
The capacitor allows one to apply a certain amount of time a sudden release of electrical energy in the (cargo). Immediately thereafter this energy delivered (dis ¬ charge).
This is i.e. so when we flush the current flow in a sudden stop. Zeif the induction current that occurs then is absorbed by a capacitor. In an automobile plant, we use a capacitor including the coil and the electric horn and also: to. Radio system to protect against the interference effect of the break sparks formed in different devices.
A capacitor in parallel with one always turns the place of power failure.
Capacity.
The ratio between the amount of electricity displaced and the tension that prevails between the plates, called the,, capacity "of the capacitor.

This increases the metal surface is greater and (or) the insulation is thinner. The conductive surface is called,, spreads siege ", the insulation, dielectric". The unit of capacitance is the Farad (F). This unit is too large for practical use, so one uses the microfarad (/ xF)
1 ^. 0.000001 F = F. When these units are too large, then one uses the picofarad.
Pp 1 ^ F = 0.000001
The capacity is usually expressed in radio technology,, centimeters "(cm). == 1 pF 0.9 cm. •
This includes the radio-tower ontstoringscondensa applied to the spark plugs, the distributor, alternator, switches, relaisenz.
The capacitor connected in parallel with the breaker of the ignition, has a capacity ranging from 0.20 to 0.5 ¬ quality / iF.
The implementation of this type of capacitor, we ien in Fig 42.
The siege fabrics consist of long strips of tinfoil (also called staniol) or aluminum.
The insulation (dielectric) consists of very thin strips of waxed paper. The strips of tinfoil and paper are placed alternately on each other, with alternating strips of tinfoil on one side or the other surface (see Fig 43). The whole is rolled up into a tight cylinder. On both end faces of the cylinder excellent tinfoil strips form the two poles.
Then the cylinder in a closed tin van, where one of the pole contacts the wall of the van (ground contact) and the pool is re-andcs a cable attached. The remaining space is filled with paraffin, which prevents the ingress of moisture. Finally, the van closed by a lid of insulating material.

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