Nonlinear analysis of a permanent magnet synchronous machine with nonsinusoidal stator winding currents

摘要

Permanent magnet synchronous machines and induction motors are often required to operate on‐line starting or inverter‐fed systems, which results in nonsinusoidal stator currents. These, in turn, give rise to undesirable harmonics and power losses which degrade motor performance. In this paper a time‐domain analysis is presented for evaluating the magnetic field distribution in the two‐dimensional cross section of the machine under load conditions. The analysis is applied to a permanent magnet synchronous machine under locked rotor conditions. Although for purposes of this analysis, the iron permeability has been assumed a constant, the method can be easily extended to include iron saturation.