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Abstract

Previous researches have shown that number of high-speed machine applications in direct drives and generator units increases from year to year. This is due to obvious potential benefits of such power installations: reduced dimensions of high-speed electric machine decreased total weight of installation, increased efficiency of energy conversion. The main purpose of this paper is to select optimal type of electromechanical converter for such installation. Four types of electrical machines were considered: synchronous machine with permanent magnets, asynchronous machine, inductor machine, switch-reluctance machine. Comparative analysis of designed 4 MW 12,000 RPM generators was conducted for active materials weight and specific power value and conclusions were drawn.