Improved Frequency-Domain Steady-State Modeling of the Dual-Active-Bridge Converter Considering Finite ZVS Transition Time Effects

D'Antonio, Michael; Chakraborty, Shiladri; Khaligh, Alireza

doi:10.1109/tpel.2020.3040708

Cited by 6 publications

(4 citation statements)

References 16 publications

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“…The procedure to obtain the LSM and SSM is simpler than the conventional DTM. The conventional DTM presented in (16) comprises an exponential matrix, results in a complicated model. The complex model obtained from DTM fails to give insightful information about the converter's behavior.…”

Section: Discussionmentioning

confidence: 99%

“…This kind of methodology where one of the state variables' dynamics is ignored is known as reduced-order modeling. The reduced-order-model of the PS-BDAB can be classified as a continuous-time reduced-order model (CTROM) [6] - [11], Fourier series reduced-ordermodel (FSROM) [1], [12] and frequency domain reducedorder model (FDROM) [13] - [16]. Other methods use both state variables (full-order) to model and study the large and small-signal behavior of the system.…”

Section: Introductionmentioning

confidence: 99%

“…The FDROM of the PSBDAB converter [13] - [16] is very identical to the FSROM [1], [12]. The difference between these two is that the current dynamics of the transformer current are not studied in the FDROM.…”

Section: Introductionmentioning

confidence: 99%

“…The model in [15] also includes output and input filters in the system's model. In [16], the authors have analyzed the steady-state operation of a high-frequency PS-BDAB converter whe0n the switching transition times cannot be neglected. It has been shown that expressions of power and the soft-switching range can be inaccurate if voltage transitions are considered instantaneous.…”

Section: Introductionmentioning

confidence: 99%

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A Detailed Full-Order Discrete-Time Modeling and Stability Prediction of the Single-Phase Dual Active Bridge DC-DC Converter

et al. 2022

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The standard methodology to obtain the model of a power electronic converter is achieved by averaging the state-space dynamics of the converter's state variables. But the average of the transformer current is null over a switching cycle in the resonant dc-dc converter. Therefore, the conventional method is not suitable for resonant converters, including the phase-shifted bidirectional dual active bridge (PSBDAB) converter. The two-time scale discrete-type models can resolve the problem associated with the standard state-space averaging methodology. The time-scale segregates the dynamics of the PSBDAB converter into fast and slow state variables, which can be modeled separately and eases the analysis of the PSBDAB converter. The effect of the core-loss of the inductor, dead-time of the semiconductor devices, output filter capacitor's equivalent series resistance, semiconductor on-resistance, and the transformer copper loss components are included in the model to improve its steady-state and dynamics characteristics. Moreover, the stability analysis using a bifurcation diagram is carried out for the digitally controlled closed-loop of the system. Furthermore, the critical gain for the stable region with variations in the circuit parameters like load resistance, circuit equivalent inductance, and voltage demand is extensively studied. The modeling and stability analysis is validated in the simulation and experimental setup. The results verify that the proposed method accurately predicts the stable region with variations in the system circuit parameters. Thus this study provides a guide to select and tune the controller parameter to ensure the converter operates within the boundaries of the stable region.

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Section: Discussionmentioning

confidence: 99%