The circuit structure and topology, control strategy, grid side power factor, reliability of load short circuit, output capacity, magnetization state of high frequency transformer and principle test of Buck, Boost and Buck-Boost three types of high frequency chain AC-AC converters The results were compared in depth and important conclusions were obtained. The high-frequency chain AC-AC converter circuit structure is composed of input filter, energy storage inductor (Boost type), input cycloconverter, high-frequency transformer or high-frequency energy storage transformer, output cycloconverter, and output filter. Made together. The research results show that the three types of high frequency chain AC-AC converters have different characteristics, engineering difficulties and applications, in order to realize new sinusoidal AC voltage regulators, AC voltage regulators, electronic transformers and co-waveform converters. Laid a key technical foundation. A lot of researches have been done on DC-DC and DC-AC conversion technologies, such as high-frequency electrically isolated Buck, Boost, Buck-Boost DC converters and Buck and Buck-Boost high-frequency chain inverses. The transformers are all familiar to the power converter. However, the research on AC-AC conversion technology is mainly limited to non-electrically isolated AC-AC converters such as thyristor phase-controlled inverters, direct matrix converters and indirect matrix converters, PWM AC choppers and low-frequency chain AC. -AC converter, etc. The high-frequency chain AC-AC converter that electrically isolates the output from the input is a subject of research and exploration in recent years. In this paper, the key technologies of the three types of high frequency chain AC-AC converters are deeply studied and important conclusions are obtained. The above is part of the content, see the PDF document for more details! Communication Aluminum Alloy Die Casting Communication Aluminum Alloy Die Casting,Custom High Alloy Die Casting,Hardware Alloy Die Casting,Metal Alloy Die Casting Dongguan Metalwork Technology Co., LTD. , http://www.diecast-pro.com