Flux Weakening Controller Design for Series-Winding Three-Phase PMSM Drive Systems

Series-winding three-phase PMSMs have a higher bus voltage utilization than the conventional with star connection. This topology is suitable for applications limited voltage. However, zero-sequence current controller will reduce of series-winding PMSMs, which causes problems in flux-weakening design. The control algorithms cause to enter overmodulation region early and degrade performance suppression algorithm. In this paper, new dynamic fundamental limit (FW-DFVL) designed PMSM traction system. Firstly, space vector modulation method combines proposed virtual vectors realize both generation suppression. accurate subspace can be derived from method. Secondly, gradient descent generates d-axis reference voltage, converge faster PI-based scheme. Thirdly, also where no longer suppressed. Vdc operation mode. Finally, simulation experimental results are utilized verify effectiveness FW-DFVL, observed.