Advanced Procedure Definition for High Performance IPM Motor Characterization

This thesis presents the development and validation of a systematic procedure for the comprehensive characterization of Interior Permanent Magnet (IPM) synchronous motors. These machines are widely adopted in industrial and automotive applications due to their high power density, efficiency, and extended constant-power operating range. The objective of this work is to define a structured and repeatable methodology capable of identifying the main electrical and mechanical parameters of IPM motors, providing a reliable foundation for accurate modeling and control design. The proposed procedure includes the experimental evaluation of the Back Electromotive Force (BEMF), the identification of electrical parameters in the synchronous reference frame, and the extraction of the direct- and quadrature-axis inductances (D–Q plane analysis). Furthermore, torque production is characterized as a function of stator current components, highlighting both magnet torque and reluctance torque contributions. Particular attention is devoted to current and speed controller tuning, field-oriented control calibration, and the construction of the torque–speed characteristic map, including constant torque and field-weakening operating regions. The methodology combines theoretical modeling and experimental measurements, enabling the assessment of nonlinear effects such as magnetic saturation and cross-coupling phenomena. The final outcome is a comprehensive and replicable characterization guideline for IPM motors, aimed at reducing development time, improving model accuracy, and optimizing drive system performance.