Abstract
Recently the high-frequency common magnetic-links instead of common dc-links with advanced magnetic materials, such as nanocrystalline and amorphous materials have been considered as viable candidates for the development of medium-voltage power converters. This offers a new route of step-up-transformer-less compact and lightweight direct grid integration of renewable generation systems. Most importantly, it minimizes the voltage imbalance and common mode issues of the converter systems. However, the electromagnetic design of the high-frequency common magnetic-links is a multi-physics problem and thereby affects the system efficiency and cost. In this paper, an optimization technique is proposed and verified with the prototype magnetic-links. The design and optimization, implementation, test platform, and the experimental test results are analyzed and discussed.
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