PLECS libraries provide two PMSM models: rotor reference frame and voltage behind reactance (VBR). The model under rotor reference frame is more efficiency for calculation, but it cannot solve the problem when PMSM is open circuit.
In PLECS, I notice that there is no any other treatment for rotor reference frame model of PMSM. As a result, if the PMSM is connected directly with three-phase half bridge circuit, and when all the IGBTs are switched off and operated at rectifier function. In particular, all diodes are still in off-state, PMSM would be operated at open circuit. So, how to solve this problem in PLECS for PMSM in open circuit.