Constant Speed Control of a Permanent-Magnet Synchronous Motor Using a Reverse Matrix Converter Under Variable Generator Input Conditions

This paper proposes a control strategy for a permanent-magnet synchronous motor (PMSM) fed by an indirect matrix converter (IMC) operating in boost mode. In order to increase the voltage transfer ratio of the IMC, a structure of the IMC having the inverse direction of power flow is adopted, which is called a reverse matrix converter (RMC). This structure operates in boost mode without additional elements or circuits. In this paper, although a generator having variable conditions is used for the input stage of the RMC system, the PMSM of the output stage can be controlled to a constant speed through the proposed control strategy. The validity of the proposed control strategy is demonstrated by simulation and experimental results.