Analytical Methodology for Modelling of Circulating Current Loss in Synchronous Electrical Machines With Permanent Magnets

This paper describes a novel analytical methodology for modelling winding copper losses as result of circulating currents (CC) in permanent magnet synchronous machines (PMSM). CCs are important to be considered at an early design stage especially high frequency and performance where sub-optimal choices can lead significant alternating current (AC) losses. Nowadays mainly FEM method is used precise calculation currents. However, it suffers on computational time required building models simulation effect that makes inapplicable optimization purpose. The demonstrates the computationally efficient through comparison with based power density PMSM concentrated validation against experimental results stator section fundamental from 500 Hz 2000 Hz. allows CC AC Ohmic when machine supplied by any waveforms, arbitrary size location conductors slots. A key novelty proposed utilization subdomain (SDM) approach conjunction solution system ordinary differential equations (ODE) equivalent electrical circuit windings. fast but has never been before loss evaluation windings machines. model intended multiple geometric dimensions, configurations conductor placement slot towards optimal design.