POTENTIAL STARTER GENERATOR TECHNOLOGIES FOR FUTURE AEROSPACE APPLICATION/

This paper presents a search and comparative review of the literature available on variable speed constant frequency (VSCF) technologies. In particular, most of the progress made in the past ten years, using po wer electronics and electric machines for VSCF systems is reported. Tw o VSCF systems, based on induction and switched reluctance machine tec hnologies, are presented, The research on the singly- and doubly-fed i nduction machines has focused on VSCF for wind power generation; where as, that on switched reluctance machines has been directly studied as a VSCF technology in aircraft system. Results obtained so far favor th e switched reluctance machine over the induction machine. Based on the foregoing comparative review, it is recommended that the induction ma chine be fully investigated as a VSCF drive in aircraft system. The fi ndings should then be compared with the counterpart SRM system. Issues of comparison may include fault tolerance and redundancy, power densi ty, torque requirements, overload ratings, temperature range and cooli ng, efficiency and stability over expected operating speed range.