Abstract
This chapter presents a hybrid phase-shift-controlled TL and LLC DC–DC converter. The TL DC–DC converter and LLC DC–DC converter have their own transformers, respectively. Compared with conventional half-bridge (HB) TL DC–DC converters, the proposed one has no additional switch at the primary side of the transformer, where the TL converter shares the lagging switches with the LLC converter. At the secondary side of the transformers, the TL and LLC converters are connected by an active switch. With the aid of the LLC converter, ZVS of the lagging switches can be achieved easily even at light load conditions. Wide ZVS range for all the switches can be ensured. Both the circulating current at the primary side and the output filter inductance are reduced. Furthermore, the efficiency of the converter is improved. The features of the proposed converter are analyzed, and the design guidelines are given in the chapter. Finally, the performance of the converter is verified by a 1 kW experimental prototype.
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Guo, Z., Sha, D. (2020). Hybrid Phase-Shift-Controlled Three-Level and LLC DC–DC Converter with Active Connection at the Secondary Side. In: New Topologies and Modulation Schemes for Soft-Switching Isolated DC–DC Converters. CPSS Power Electronics Series. Springer, Singapore. https://doi.org/10.1007/978-981-32-9934-4_2
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DOI: https://doi.org/10.1007/978-981-32-9934-4_2
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