Journal
2022 24TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE'22 ECCE EUROPE)
Volume -, Issue -, Pages -Publisher
IEEE
Keywords
Small signal; Modelling; Single Active Bridge; Isolated converter; DC-DC power converter
Funding
- European project [UE-18-POWER2POWER-826417]
- Principado de Asturias [SV-PA-21-AYUD/2021/51931]
- Spanish Ministry of Science, Innovation and Universities [MCI-21-PDC2021-121242-I00, MCI-20-PID2019110483RB-I00]
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This article presents the average small signal model of the Single Active Bridge (SAB) converter and analyzes its behavior in different conduction modes. The results are confirmed through simulations.
In this article the average small signal model of the Single Active Bridge (SAB) converter is obtained. This converter can operate in two different conduction modes, Discontinuous Conduction Mode (DCM) and Continuous Conduction Mode (CCM). The SAB and the Phase-Shifted Controlled Full Bridge (PSFB) converter when operating in DCM present the same static behavior if the value of the inductor of the SAB is the same as the value of the output inductor of the PSFB referred to the primary side of the transformer. This conclusion can be extrapolated from the static analysis to the dynamic average small signal model, as such a first order model is obtained for this operating mode. However, when the SAB converter operates in CCM, the current through the inductor does not start at zero at the beginning of the switching period. Both small signal models are analyzed and confirmed by means of simulations.
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