The analysis, modeling and control of an interleaved boost series resonant converter (IBSRC) is presented in this paper. The converter consists of an interleaved boost stage, a high-frequency transformer (HF-XFMR) and a voltage doubler rectifier. The HF-XFMR's leakage inductance and the voltage doubler bridge rectifier's capacitors form a resonant tank that allows zero-voltage switching (ZVS) of the main semiconductor devices and zero-current switching (ZCS) of the rectifier's diodes. This capability enables the IBSRC to operate at high switching frequencies leading to a compact design while keeping efficiency high. This makes the IBSRC suitable for the dc-dc converter stage of a dual-stage microinverter. The IBSRC dynamics are extensively investigated using the extended describing functions (EDF) methodology, whereas the converter small-signal model is derived to design the closed-loop control strategy. Experimental results on a 350-W prototype are presented to demonstrate the feasibility of the proposed model and the performance of the controller during input and output variations.
Tópico:
Advanced DC-DC Converters
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15
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Fuente2022 IEEE Applied Power Electronics Conference and Exposition (APEC)