A new Loss Minimization Algorithm for Interior Permanent Magnet Synchronous Machine drives

A new Loss Minimization Algorithm (LMA) for an Interior Permanent Magnet Synchronous Machine (IPMSM) drives is presented in this paper. Usually, IPMSMs efficiency is increased by minimizing the controllable loss such as copper or/and iron loss. However, the parameters of an IPMSM vary with operation conditions due to magnetic saturation, and the iron loss is highly non-linear, both of which increase the difficulties of searching the true minimum loss solution. A method of generating optimal currents look-up tables for IPMSM loss minimization with due account of the voltage drop on the stator windings resistor is proposed. The parameter variations due to saturation effects and a high fidelity iron loss model are employed to generate the look-up tables via an optimisation process. The utility of the loss minimisation algorithm is illustrated through simulation studies.