An FE-based Physical Phase Variable Model for PM Synchronous Machines Including Dynamic Core Losses

An improved FE-based phase variable model for PM synchronous machines is developed. The developed model can be used dynamically for motor control applications. Previous models, developed earlier by these authors, consider the rotor position dependence of the inductances and the flux linkage due to the permanent magnets. In the improved model, the effect of core loss as well as its variation with the rotor position is added. Such an effect is obtained from transient FE solutions of the machine covering a complete steady state ac cycle. Details on the improved model, Simulink implementation, core loss calculation using FE analysis, and its applications in controllers detuning study are presented in the paper. The improved model gives more detailed information of operating PM machines and is computationally fast. It is particularly useful for machine control study