Direct torque and flux controlled induction generator for integrated starter alternator with minimized sensor numbers

A direct torque and flux controlled induction generator is developed in this paper for future 42 V automobiles application. The sensor numbers of the whole system is minimized with proposed control scheme and only three sensors are required. Fixed switching frequency and low torque ripple are obtained with space vector modulation. By controlling the torque and stator flux of the induction machine properly, the required DC bus voltage can be established and kept as constant. Modeling results show the feasibility of this scheme for the integrated starter alternator.