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Research on the Variable Speed Technology of Large Power AC Motors

The variable speed technology of large power AC motors is not only the key equipment for the large-sized mechanical drive,but also the emphasized spreading technology of the energy-saving and emission-reducing work.In this paper the it is introduced that during the research and development of large power AC-AC variable speed technology and the equipment localization the theory of the large power AC variable speed is enriched and improved,the independent innovation of core technology is formed,and multiple key technologies of large power AC variable speed equipment is resolved.These above mentioned promote the domestic equipment to the international advanced ranks and gain remarkable economic and social benefits.In this paper the research of the first 7.5MVA IGCT AC-DC-AC convertor is also proposed.This convertor has compact structure,excellent performance and reliable operation.It reaches the world's advanced level.
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