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A LLC-Type Dual-Bridge Resonant Converter: Analysis, Design, Simulation, and Experimental Results

2013; Institute of Electrical and Electronics Engineers; Volume: 29; Issue: 8 Linguagem: Inglês

10.1109/tpel.2013.2291207

1941-0107

Xiaodong Li,

Multilevel Inverters and Converters

In this paper, a high-frequency isolated dual-bridge LLC -type resonant converter is proposed. The steady-state analysis of the proposed converter is performed using a modified fundamental harmonics approximation approach, by which the component stress can be obtained quickly without complicated calculation. Necessary and sufficient conditions for zero-voltage switching of all switches are derived too. To illustrate the usefulness of the FHA analysis for a fast design, a design example of a 100 kHz, 200 V input, 40-48 V output 300 W converter is given. Computer simulation and experiment results are included for the purpose of validation. It is shown that this converter is able to maintain zero-voltage switching operation for a wide load range while keeping high efficiency.