I am trying to simulate 1KV AC voltage controller with restive load using TGF-148-1100 SCR from Multisim SCR library. But the output is not correct. Although i have changed the convergence parameters according to recommendation in help. But it always gives convergences error in first try. In second try, the simulation runs but output is not correct. The waveform shows that the reverse SCR does not conduct even the firing angle is applied at 180 degree.The problem is with negative half.
I have also tried using 2N5207. But same result.
Pls someone guide me....
