<div class="htmlview paragraph">System modeling and simulation results for an experimental switched reluctance external integral starter/generator (EISG) are reported. The EISG system employs a single switched reluctance machine and a generating system architecture that produces two separate 270 Vdc buses from that single switched reluctance machine. The machine has six phases with three of the phases connected to one converter supplying 125 kW to one 270 Vdc bus while the other three phases are connected to a second converter supplying 125 kW to the other 270 Vdc bus. Each bus has its own EMI filter and control in addition to its own converter.</div> <div class="htmlview paragraph">Two separate system models have been developed for the EISG. One of these models has been denoted the averaged model and the other has been denoted the detailed model. Both models include the switched reluctance machine and power electronics, the EMI filter, and the feedback control. The development of both of these models is described.</div> <div class="htmlview paragraph">Simulation results for the EISG system operating in the generating mode using both the averaged and detailed models are presented and compared to results obtained from the experimental EISG system. Having thus demonstrated the validity of the models they are used to predict the performance of the system for conditions for which there is no experimental data.</div>