Lavery M, Schwanninger R, März M (2025)
Publication Type: Conference contribution
Publication year: 2025
Publisher: IEEE
City/Town: New York City
Pages Range: 1-6
Conference Proceedings Title: 2025 Energy Conversion Congress & Expo Europe (ECCE Europe)
DOI: 10.1109/ECCE-Europe62795.2025.11238897
This paper focuses on the modeling of a nonisolating bidirectional buck-boost half-bridge converter for the simulation of DC grids. The model is developed using a previously presented approach based on averaged-switch modeling. Depending on the operating mode, the model automatically transitions from buck to boost operation as well as seamlessly switching between Continuous Conduction Mode (CCM) to Discontinuous Conduction Mode (DCM). The differences of the converter modeling and behavior for Synchronous Switching Mode (SSM) and Asynchronous Switching Mode (ASM) are discussed. Model function and accuracy are evaluated and verified using simulations: the mode-switching functionality is evaluated by changing the control-side load of the converter. It is shown that the model changes between operating modes and conduction modes, without requiring adjustments to the power stage or the converter control. For both SSM and ASM, the converter remains stable during load changes. In DCM, some delays and current spikes are observed, which are attributed to the reduced current control dynamics. Furthermore, the model is verified by comparing measured and simulated converter impedance, which demonstrated a generally good agreement. The developed model accurately represents the converter behavior and functions as intended.
APA:
Lavery, M., Schwanninger, R., & März, M. (2025). Model of Bidirectional Half-Bridge Converter with Automatic Mode-Change. In 2025 Energy Conversion Congress & Expo Europe (ECCE Europe) (pp. 1-6). New York City: IEEE.
MLA:
Lavery, Melanie, Raffael Schwanninger, and Martin März. "Model of Bidirectional Half-Bridge Converter with Automatic Mode-Change." Proceedings of the 2025 Energy Conversion Congress & Expo Europe (ECCE Europe) New York City: IEEE, 2025. 1-6.
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