Draw the dc output voltage and voltage across T3 in a Graetz Circuit when firing angle is 45 degree and u=30 degree.

 

https://www.blog.vikiwat.com/en/gra...and-principle-of-operation-of-graetz-circuit/

 

when firing angle is 45 degree and u=30 degree.

That sounds like a Graetz Circuit with SCRs in the bridge.