This will be easier to do with a slightly different block, the Converter (Three Phase). You can set this block to averaged switch in the settings and use it as an average inverter, but it will aslo explicitly model the diode rectifier. You can turn it off by sending 0's to all 6 gate inputs. To see how to configure the 6 gate inputs off of an average signal, please see this example:
The bottom converter using modulaiton waveforms is the same as the average value VSC for control.
