Approach for the rapid characterization and control of an induction machine

Induction machines are commonly used in traction applications due to their robustness and lower production costs when compared to the Permanent Magnet Synchronous Motor (PMSM). In such traction applications, the induction machines are mainly operated by field oriented control. This control technique requires an accurate knowledge of the machine's parameters. The accuracy of the parameters influence the precision of the calculated rotor flux and its angle and the decoupling of the machine's equation into the direct and quadrature coordinate system (dq-components). Furthermore, the parameters can be used to configure the controllers of the field-oriented control system and therefore have an influence on the dynamic behavior and stability of the control. In this paper we will discuss, analyze and compare different methods to calculate the machine's parameters in an automated and rapid procedure with minimal measuring expenditure. Moreover, a method to configure a control that reduces the overall Ohmic losses of the machine in every point of operation will be presented and analyzed.