Extremum Seeking Control of Hybrid Excited PM Synchronous Motors for Minimum Losses Tracking

This paper deals with the characterization and the online tracking of the minimum losses trajectory in hybrid excited permanent magnet motors. The extremum seeking control strategy is analyzed to ensure the convergence and the accuracy of the control technique. In electrical machines including a rotor winding producing a flux, Joule losses are produced in the rotor as well. Thus the optimal control trajectory to develop the maximum torque per losses has to consider not only the stator losses, but the rotor losses as well. This increases the complexity of the problem. This paper deals with the control strategy to be adopted in this case, with the focus on the hybrid excited rotor configuration.