ABSTRACT
Recall that we have investigated the polyphase induction machine in Chapter 4. We examined the machine’s main structural details, and developed accurate mathematical models. We also examined motor performance, operating under balanced three-phase sinusoidal excitation, and running at constant speed. The approach was extended to system dynamic performance, such as starting and stopping, assuming quasi-AC balanced operation. But what if the applied voltages are not balanced? Indeed, what if the excitation voltages are not sinusoidal? And finally, what if the mechanical transients have time constants comparable to the electrical transients? We shall extend our work to these important topics now.
