somebody help me find a full explanation of thyristor drive....

 

Greetings! And welcome to AAC!

I've moved your post into its own thread, where it will draw more responses.

Please refrain from "hijacking" existing threads with tangent or off-topic questions. You can create new threads for new questions using the "New Thread" button on the upper left of the page.

The data sheet for the device should give full parameters for gating it.