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功率半导体和变换器技术的新近发展导致各种电路拓扑结构的激增，其中有些拓扑结构有着相互矛盾的性能要求。对于非专业的应用工程人员来说，往往使他们拿不定主意，结果就可能得不到最佳的变换器选择。本文对各种ＡＣ－ＡＣ变换器结构进行了全面的评论并给出比较性的评估。这就为如何根据一定的应用，选择最佳技术提供了线索。这个评论和评估都是在相对高的层次上进行的，设计上的细节可在参考文献的有关章节中查到。
Recent advances in power semiconductor and converter technology have led to a surge in various circuit topologies, some of which have conflicting performance requirements. For non-professional application engineers, they are often undecided, and the result may not be the best converter choice. This article provides a comprehensive review of the various AC-AC converter architectures and gives a comparative assessment. This provides clues as to how to choose the best technology for a given application. This review and assessment are carried out at a relatively high level, the design details can be found in the relevant sections of the reference.