Current Injection-Based Self-Commissioning of Synchronous Reluctance Motor Considering Cross-Saturation Effect

The flux linkage characters of synchronous reluctance motors (SynRM) are usually tested offline due to a significant cross-saturation effect. In this paper, a self-commissioning method with current injection is proposed, in which the cross-saturation effect is considered. The reference equation for the injection current is derived in order to avoid potential rotor motion during the injection, and it ensures that sufficient valid data is distributed in the current plane after the injection. Considering the difficulty of PI tuning under unknown motor pa-rameters, a current controller based on general-integral extended state observer (GI-ESO) is applied to track the given current. Experiments are performed on a 3kW SynRM platform to verify the validity of the proposed method. The proposed method offers a promising solution for industrial applications of SynRM.