Basics concept of : Thyristor

1. Design and principle of operation of Thyristor

Composition of Thyristor Thyristor Symbol relatively dotuong Profile

Thyristor is made up of four layers of semiconductor incorporated into two transistors connected in series, an agreement and a Transistor Transistor reverse (equivalent diagram above). Thyristor has 3 pole is the anode, and Gate Katot called AKG, Thyristor diode controller is normal when biased, Thyristor not conductive, when a voltage clicking on foot G => Thyristor guide until Cutting reverse voltage or voltage source new Thyristor stop guide ..

The following experiment illustrates the operation of Thyristor

Experiments illustrate the operation of Thyristor.

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  Initially the switch K2 is closed, Thyristor although biased but no electric current running through it, no lights.


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  When the switch K1 closed, the voltage level at the foot G U1 Q2 led lamps => Q1 entail leading lights => U2 currents from passing Thyristor do the lights.


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  Next we see the disconnect switch K1 but still bright lights, because the Q1 result, B leg lamp voltage increases as Q2 Q2 result, when making application guide pins B Q2 Q1 lamp makes lamp Q1 reduce lead, so two light bias to each other and maintain electrical conductivity status.


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  Lamps maintained until K2 interrupt => Thyristor non-powered and discontinued operations status.


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  When stopped Thyristor lead, but we played K2 bright lights still do not like the original case.

Shape Thyristor

Measure check Thyristor

Measure check Thyristor

Set up pool ladder x1 W, placed on the anode rod black, red sticks needles into initial Katot up, use a foot short on the leg Tovit G => see the clock on the needle, then put Tovit out => clock stays up kim => Thyristor so good.

Application of Thyristor

Thyristors are often used in the rectifier automatic doubling of pulse source color television.

Example 2 in human rectifier source JVC color television in 1490 with the following diagram:

Application of Thyristor in human rectifier 2 automatic pulse source of color TVs JVC