3 Phase Fully Controlled Rectifier Problems

[Rod_The_Capitalist]

Hi everyone. I would like you to help me with this, please. I´m simulating a 3 phase fully controlled rectifier using thyristors. I'm turning on each thyristor twice in cycle in order to turn them on in synchronism (see the file attached). I´m using multisim 11.0. I don't what else to say. I would appreciate a lot to anyone who could help me. Thanks!!

PD: sorry for my english, if I made some mistake. I'm not a native english speaker.

[Rod_The_Capitalist]

I forgot to say that as you can see in the simulation, before simulation error appears, the load voltage should be the phase to phase voltage, which is 220*sqrt(6), but instead, asume a medium voltage close to 110 V. I also have problems trying to simulate failures on rectifiers, apparently errors occurs when I change phases (positive seq to negative seq) or remove the reverse load diode, for example.  What can I do? Thanks! to all.

[Rod_The_Capitalist]

Hi everyone, I realized some mistakes in the last schematic, particularly I wasn´t turning on the lower thyristors correctly, so I fixed that, but the problem persist and it doesn't converge to a solution... I really don´t know what else to do, please, help me with this!!, Thanks to all.

[JuDa]

Hi Rod_The_Capitalis

There is an example in the NI Example Finder (Menu bar>>Help>>Find Examples and if you search Rectifier there is an example called Controlled 3 Phase Rectifier.ms11 that you can use as a base for your project.

Have a great day

[Rod_The_Capitalist]

At last someone!!!, thank you!!