Universal Control of Permanent Magnet Synchronous Motors with Uncertain Dynamics

Permanent magnet synchronous motors (PMSMs) are used in various industrial applications and many theoretical advances have been achieved in the domain of PMSM control. However, more research is needed in area of self-commissioning drives which can operate with very minimum information of motor parameters. This thesis focuses on the universal control design of PMSMs and uses two control methods: conventional field-oriented vector control and simplified control. In vector control, the classical proportional-integral (PI) controller is used to control the d-q axis currents and speed of the PMSM. The main aim is to determine the PI controller gains using an empirical study and generalized mathematical expressions. In vector control, these equations use power ratings, while in simplified control, the product of number of pole pairs and flux linkage is used for automatic gain calculation. Validation of both the proposed control strategies is done in MATLAB/Simulink, and satisfactory results are obtained.