Asymmetric‐double‐sided modulation for fast load transition in a semi‐dual‐active‐bridge converter

To eliminate the dc bias current generated during load‐change transition, the asymmetric‐double‐sided modulation (ADSM) control is applied to a semi‐dual‐active‐bridge converter. Although the converter has three main different operation modes, the ADSM control can effectively remove the dc bias current during load‐change transition among different modes in one or two high‐frequency cycles. Theoretical analyses for different cases of transition are presented. Verifications through experimental test are also included. Besides the effectiveness, the involved calculation in ADSM control is quite simple and the only needed parameter is the converter voltage gain, which makes it easy for actual implementation.