电流源高频交流环节AC/AC变换器研究

提出了基于反激F1yback变换器的电流源高频交流环节AC/AC变换器电路结构与拓扑族。该电路结构由输入周波变换器、高频储能式变压器、输出周波变换器以及输入、输出周波变换器构成，能够将一种不稳定畸变的交流电变换成问频率稳定的正弦交流电压；该电路拓扑族包括单四象限功率开关式、推挽式、半桥式、全桥式等四种电路。以单四象限功率开关式电路拓扑为例，分析研究了这类变换器工作模式、稳态原理与电压瞬时值反馈控制策略，给出了变换器的外特性曲线、关键电路参数设计准则。原理试验结果证实了这类变换器新概念的正确性与先进性。

RESEARCH ON CURRENT MODE AC/AC CONVERTERS WITH HIGH FREQUENCY AC LINK

Based on Flyback converter, a novel circuit structure and topologic family of current-mode AC/AC converters with high frequency ac link are proposed. The circuit structure is constituted of input cycloconverter, high frequency storage transformer output cycloconverter, as well as input and output filter. The circuit structure is used for transfering the unstable ac voltage with high THD into a regulated constant frequency sinusoidal voltage. The circuit topologic family includes circuits of single four-quadrant power switch mode,push-pull mode,half-bridge mode.and full-bridge mode. Take the topology of single four-quadrant power switch as example , an operation mode, steady principles and transient voltage feedback control strategy of a converter are investigated. Consequently, an output characteristic curve.a design of key circuit parameters are given.A correction and advance of the new concept of those converters are verified by the test results.