Dual-Active Bridge Series Resonant Electric Vehicle Charger: A Self-Tuning Method

Abstract

This paper presents a new self-tuning loop for a bidirectional dual-active bridge (DAB) series resonant converter (SRC). For different loading conditions, the two active bridges can be controlled with a minimum time displacement between them to assure zero voltage switching (ZVS) and minimum circulation current conditions. The tuning loop can instantly reverse the power direction with a fast dynamics. Moreover, the tuning loop is not sensitive to series resonant tank tolerances and deviations, which makes it a robust solution for power tuning of the SRCs. For simplicity, the power is controlled based on the power-frequency control method with a fixed time displacement between the active bridges. The main design criteria of the bidirectional SRC are the time displacement, operating frequency bandwidth, and the minimum and maximum power, which are simply derived and formulated based on the self-tuning loop’s parameters. Based on the parameters of the tuning loop, a simplified power equation and power control method is proposed for DAB-SRCs. The proposed control method is simulated in static and dynamic conditions for different loadings. The analysis and simulation results show the effectiveness of the new tuning method.

A comprehensive review on isolated and non-isolated converter configuration and fast charging technology: For battery and plug in hybrid electric vehicle

“…The primary switches of a double full bridge LLC resonant converter are used to charge batteries for electric vehicles at constant current and constant voltage. The ZVS and ZCS is achieved in the continuous charge action for current and voltage for all primary switches, which leads to high efficiency [ 123 ]. The topology of two-way resonant converter for electric vehicle to grid communication over a wide range of battery voltages, provides a high-efficiency.…”

Resonant Power Converters for Renewable Energy Applications: A Comprehensive Review

“…A stable power flow was maintained between the ports; the main voltage values at each port was kept constant regardless of the operation mode. This system can use only one transformer to combine two sources and offer galvanic isolation to the grid (Namadmalan et al, 2020).…”

A DC-DC Center-Tapped Resonant Dual-Active Bridge with Two Modulation Techniques

“…A dual-active bridge (DAB) converter can be considered as a regulated DC transformer, capable of adjusting its output voltage under varying load and input voltage conditions [1][2][3][4]. Due to its potential in high power density, soft switching capability, galvanic isolation and flexible modulation, DAB has become an attractive candidate for applications such as renewable energy harvesting, new energy vehicle chargers and DC micro-grid distribution networks [5,6].…”