A thyristor is a controlled rectifier where the unidirectional current flow from anode to cathode is initiated by a small signal current from gate to cathode.
A thyristor is a solid-state semiconductor device with four layers of alternating P- and N-type materials.
A thyristor is a solid-state semiconductor device with four layers of alternating P- and N-type materials.
A thyristor is turned on by making its gate positive with respect to its cathode, thereby causing current flow into the gate. When the gate voltage reaches the threshold voltage and the resulting current reaches thethreshold current within a very short time known as the gate-controlled turn-on time,the load current can flow from ’a’ to ’k’.
When the load current reaches the thyristor’s latching current,load current flow will be maintained even after removal of the gate current. As long as adequate load current continues to flow, the thyristor will continue to conduct without the gate current. It is said to be latched ON.
In order to turn the thyristor off, the load current must be reduced below its holding current for sufficient time to allow all the mobile charge carriers to vacate the junction
0 comments:
Post a Comment