I am facing an issue with current source based converter circuit, Figure attached. The output load is single phase AC (240 V, 4 KW).
I am not getting a sinusoidal output current as expected, i.e. a sine wave varying with reference as zero, instead I am getting it with a DC offset.
My pulse control and other seems to be working fine, as when i replace the output with A DC source, I get the desired outputs. It's with AC that the output current is not sinusoidal.
Am I missing grounding the circuit properly or anything like that? Any help would be appreciated.