POTENTIAL STARTER GENERATOR TECHNOLOGIES FOR FUTURE AEROSPACE APPLICATIONS/

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. T wo VSCF systems, based on induction and switched reluctance machine te chnologies are. presented. The research on the singly- and doubly-fed induction machines has focused on VSCF for wind power generation, wher eas that on switched reluctance machines been directly studied as a VS CF technology in aircraft ms. Results obtained so far favor the switch ed reluctance machine over the induction machine. Based on the foregoi ng comparative review, it is recommended that the induction machine be fully investigated as a VSCF drive for aircraft systems. The findings should then be compared with the counterpart SRM system. Issues of co mparison may include fault tolerance and redundancy, power density, to rque requirements, overload ratings, temperature range and cooling, ef ficiency and stability over expected operating speed range.