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A Level     Power Switching     Capacitor Phase     Diac     MOSFET     Phase     Relay     >Thyristor<     Thyristor AC     Transistor     Triac    

Power Switching Thyristor


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Thyristor Circuit Diagram SymbolA thyristor acts as a self latching switch with no moving parts.
It has high reliability and fast switching.
It's triggered by a short gate current pulse.

Thyristors are also called Silicon Controlled Rectifiers because they are like diodes but with added switching behaviour.

For conduction to take place ...

For triggering ...

Gate Resistor Value

R = VR / IG        VR = VS - VG

Thyristor Power Dissipation

Commutating Capacitor

This is a method of shutting off a thyristor. In the simulation below, 

Light Dimmer

Adjust the duty cycle or mark space ratio of the 400Hz source.

 

 

 

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