Steady-State Modeling and Excitation Analysis of a Novel Cascaded Induction Starter-Generator

The aerospace sector is facing increasingly stringent performance demands for starter generators. This study proposes an innovative Cascaded Induction Starter-Generator (CISG) capable of regulating output voltage under varying load and speed conditions. The proposed CISG eliminates electromagnetic coupling between the control and power windings. The control winding capacity is reduced by introducing an excitation capacitor into the power winding to supply reactive power. The topology and operating principles of the CISG are described, followed by the development of its mathematical model incorporating excitation capacitance. The study further investigates the voltage build-up principle in the CISG power winding and proposes an optimization method for excitation capacitance to minimize the control winding capacity. Finally, experimental results validate the operational principles and performance of the proposed CISG.