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The purpose of Phase 1 of this program was to conduct a comprehensive analysis of all known practical approaches to static frequency-changer designs for converting 60-cps, 3-phase power to 400-cps, 3-phase power. It was also a purpose of this program to propose a means of comparing those systems analyzed by tabulating the advantages and disadvantages of each. Both theoretical and practical data were obtained and formulated in such a way that preferred designs can be selected readily, with selection based on desired characteristics. These desired characteristics have been measured against the three groups of parameters outlined in SHIPS-F-4424. (Author)