| PMSMs, refers as permanent magnet synchronous machines. It has been widely used in various applications, for their high power/torque density and high efficiency. Most of the PMSM drive systems in industrial applications are controlled with PI controllers, thus the demand to automatically set the PI parameters is growing. For an unknown motor, electrical and mechanical parameters must be identified with an off-line test at first in order to build the mathematical model and control loop analysis. For varying operating conditions, on-line parameter measurement and real-time loop tuning are required. In this thesis, the applicable off-line methods for identifying the resistance and inductance for PMSMs are applied on inverter-fed drive system without any external devices. And different methods of inductance identification are tested and analyzed. Moreover, the estimation of back-emf constant based on the same system is introduced. At last, the control loop tuning based on the measured parameters is analyzed. |
