Conference: 2025 International Conference on Electrical Machines and Systems (ICEMS)
Authors: Ye-Na Bai, So-Yeon Im, Seung-Hun Lee, Hyun-Jeong Hong, Myung-Seop Lim
DOI:
The open-end-winding PMSM (OEW-PMSM) offers higher power and superior field-weakening capability than a conventional three-phase PMSM, but its common-DC-bus topology generates zero-sequence current (ZSC), raising losses and torque ripple. Proportional–resonant (PR) control can suppress ZSC, yet the extra compensation voltage shrinks the available voltage margin and limits high-speed performance. This work presents a rotor modification that mitigates ZSC at the source. The proposed geometry reduces ZSC by up to 73% relative to the baseline motor and, under the same ZSC constraint, delivers greater torque and voltage utilization. These results confirm that design-level modification can complement—or replace—control-based ZSC suppression.