A Flexible Compensation Control Strategy for High-Frequency Link Matrix Converters

High-frequency link matrix converters (HFLMCs) omit a dc-link capacitor, which can achieve power transmission from dc to ac with only one power converter stage. However, due to the core shift and vibration, parameter perturbation usually occurs in the isolated high-frequency transformer (IHFT) of the HFLMC, which threatens its safety. This article proposes a flexible compensation control strategy for HFLMC. A rotary IHFT is designed, and the transmission power and current stress on the IHFT of HFLMC under the symmetrical SVM strategy are analyzed. The designed IHFT can comprehensively simulate the parameter perturbation caused by core shift and vibration, and the proposed control strategy can reduce power fluctuation and the current stress on the IHFT of the HFLMC. Simulation and experiment are conducted, and the results validate the effectiveness of the proposed control strategy.