Reference Input Signals Formation for Induction Motor Control in Traction Drive

The purpose of this work is to build the analytical improved (with resistances estimation) real time computation reference inputs for rotor flux and torque in vector control system an induction motor a traction electric drive. must maximize electromagnetic conditions voltage source instability, particularly magnetic field weakening mode. conventional way mode form coupling task inversely proportional speed or square second third zones respectively. Such input signals are not able provide maximum capability over entire range, achieved different ways. For instance, feedback useful enhancement internal external perturbations. A wide change with reveals nonlinear properties motor. However, systems, proportional-integrating (PI) regulators usually used. Therefore, firstly, linear PI controllers be robust, secondly, guaranty linear, saturated state each controller. proposed expressions calculating as functions actual approximate expressions. estimation possible error shows that acceptable. Simulation performed taking into account calculation signal by microcontroller dynamics frequency invertor. simulation resulting validates effectiveness using formation real-time setting torque.