Small signal phasor modeling of dual active bridge series resonant DC/DC converters with multi-angle phase shift modulation

2011 ◽  
Author(s):  
Daniel Seltzer ◽  
Luca Corradini ◽  
Douglas Bloomquist ◽  
Regan Zane ◽  
Dragan Maksimovic
Keyword(s):  
Phase Shift ◽  
Small Signal ◽  
Dual Active Bridge ◽  
Series Resonant

scholarly journals Small-Signal Model for Dual Active Bridge Series Resonant DC-DC Converters with Variable-Frequency and Phase-Shift Modulation

2019 ◽  
Vol 37 (4) ◽  
pp. 830-837
Author(s):  
Weijian Han ◽  
Ruiqing Ma ◽  
Qing Liu
Keyword(s):  
Phase Shift ◽  
Closed Loop ◽  
Variable Frequency ◽  
Stable Operation ◽  
Small Signal ◽  
State Variables ◽  
Signal Model ◽  
Dual Active Bridge ◽  
Small Signal Model ◽  
Series Resonant

Variable frequency and phase shift modulation can achieve zero-voltage switching (ZVS) of dual active bridge series resonant DC-DC converters(DABSRCs) over a wide operating range so as to effectively improving system efficiency and reliability. In order to study the dynamics of DABSRCs and provide the basis for the closed-loop compensator design, a continuous-time small-signal model is proposed. The generalized average modelling approach is adopted, in which the DC component of the output voltage and the fundamental component of the inductor current and resonant capacitor voltage are selected as the state variables, precisely describing impacts of the resonance on the system dynamics. On the above-mentioned basis, a closed-loop compensator is designed, which achieves the stable operation with the ZVS variable frequency and phase shift modulation. The analysis results are verified by the simulation and experimental results.

scholarly journals A Dual Rising Edge Shift Algorithm for Eliminating the Transient DC-Bias Current in Transformer for a Dual Active Bridge Converter

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4264
Author(s):  
Michal Gierczynski ◽  
Lech M. Grzesiak ◽  
Arkadiusz Kaszewski
Keyword(s):  
Phase Shift ◽  
Power Flow ◽  
Bias Current ◽  
Compensation Algorithm ◽  
Dual Active Bridge ◽  
Simple Implementation ◽  
Dc Bias ◽  
Fast Settling ◽  
Parameter Values ◽  
Laboratory Prototype

This paper deals with a well-known problem of the transient DC-bias current occurring during a phase shift transition in dual active bridge (DAB) DC/DC converters. This phenomenon, if not compensated, can cause damage to the converter or deteriorate its performance. One aim of this paper is to present a solution which allows for the elimination of the undesired transient DC-bias component in current waveforms. This solution is the dual rising edge shift (DRES) compensation algorithm. It provides a very simple implementation and fast settling time within the first half of a switching period. Moreover, the solution is independent on any measurements or system parameter values. It is based on the double-sided single phase shift (DSSPS) modulation, which is described in detail along with a converter model in steady-state. Then, the mechanisms leading to the transient DC-bias are explained, and the compensation algorithm is derived. The performance of the algorithm has been tested using a laboratory prototype. A comprehensive set of tests, involving rapid step changes in power flow and frequency sweep, are provided. Finally, the features of the proposed algorithm are briefly discussed.

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