A zero current commutation model predictive control method for the induction motor drive system fed by indirect matrix converter

摘要

In order to simplify the commutation in the virtual rectifier, a zero current commutation model predictive control (ZCC-MPC) method is proposed for the induction motor drive system fed by indirect matrix converter (IMC). Switching states combination is adopted in the virtual inverter instead of single predictive switching state, which ensures that the inverter stage keeps at zero voltage vectors during the whole commutation procedure between bi-directional switches in the rectifier stage. Simulation results show that the drive system has good steady-state/ dynamic performances and the dc bus current is zero during switching actions of the rectifier. As a result, two-step dead-time commutation can be used for the virtual rectifier stage instead of the conventional four-step commutation method, which improves the safety, reliability and performances for the indirect matrix converter.