Trying to simulate two mechanically coupled PMSMs each driven by an IGBT converter with parasitics. The problem is that both converters cannot be specified with a forward voltage drop on the IGBT/diode, or else Simulink throws a zero-crossing error on the circuit S-function (the error is not more specific than that). If one of the convertera are specified with a forward voltage drop equal to 0, then it works.
There is a way around this, I have found, which is to connect a three-phase resistor net in parallell with the machine. In turn, the problem now is that it only works if the resistance is sufficiently low (around 200 Ohm) or else the simulation time becomes unrealisticly long. This makes the current, beacuse of the reisance, a bit too high for my liking.
Any thoughts on this are highly appreciated.
Model and figure attached.