Losses minimisation of a field-oriented controlled induction machine by flux optimisation accounting for magnetic saturation

In this work, the minimisation of the total copper losses in an induction motor has been achieved by optimising the flux level as a function of the motor torque. The changes in motor parameters depending on flux level are taken into account. Three losses minimisation methods are presented and compared both by simulation and experiments. Results obtained from an appropriate benchmark show that the input machine power can be decreased by 15% when using such optimisation.