Gearless PM synchronous machine maximum power point tracking approach with single stage AC/DC conversion employing modular three phase multilevel converter based on switch capacitor cells

In this paper, a gearless PM Synchronous Machine (PMSM) maximum power point tracking (MPPT) approach with single stage AC/DC conversion is presented. The proposed topology employs multilevel converter using Switched-Capacitor-Cell-Based (SCCB) converter to convert the three phase AC generated voltage by the PMSG to a fix DC link voltage in a single stage. The advantage of employing multilevel converter is to have voltage controlled rectifier leading to direct power angle control and consequently eliminate the need of changing the rotor speed by gear box to extract the maximum power from the turbine. The proposed topology can be applied for wind tribune PM generator and EV PM Motors as well. However, wind turbine application is exposed in this paper. Analysis and simulation results are included in this paper. Experimental laboratory prototype is to be continued in the future work.