Coupled Magnetic Circuit-Based Design of an IPMSM for Reduction of Circulating Currents in Asymmetrical Star–Delta Windings

Combined star (Y)–delta ($\Delta )$ windings suffer from undesirable circulating currents resulting in increased winding losses and saturation, leading to demagnetization in permanent magnet synchronous machines (PMSMs). The main causes for these currents are the induced voltage harmonics from the winding configuration and rotor saliency. Thus, this article presents a novel coupled winding function and magnetic circuit model to accurately model …