H. M. de Oliveira Filho, D. Oliveira, C. E. de A e Silva, F. L. Tofoli
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引用次数: 15
Abstract
This paper presents the analysis, design, and simulation results for a ZVS bidirectional isolated three-phase DC-DC converter with dual phase-shift and variable duty cycle. The topology uses three single H-bridges in the primary side and a three-phase inverter in the secondary side. The isolation is ensured by using three single-phase transformers connected in open delta-wye configuration. Variation of both phase shift angles between single H-bridge legs and/or primary and secondary side allows the power delivery control. This additional flexibility allows the system to maintain a low reactive power flow. The variable duty cycle is used to ensure a constant voltage bus and ZVS soft switching operation. A detailed analysis is presented considering a model based on fundamental components. Simulations for converter are performed to validate the model used.