Analysis and design of single‐stage, two‐mode AC/DC converters for on‐board battery charging applications

Abstract

On-board battery chargers (OBCs) offer the feasibility of charging electric vehicles or plug-in hybrid electric vehicles with a standard household power supply. In this study, an OBC using two-mode topology (step-up or step-down) is presented. One of the main concern with two-mode topologies is the hard transitions of the converter operating from boost mode to buck mode or vice versa, which can deteriorate the performance of converter. This study provides smooth transitions between the modes and can have an output that could be more or less than the peak of input voltage. The detailed analysis of operating modes involved in the converter are analysed in the study. Moreover, the stress analysis on the components is also detailed in this study and the results are compared with existing two-mode converters. A simple dual-loop control structure with the proposed modulation technique eliminates the sub-harmonic oscillations and stabilizes the output voltage is also presented in the study. Experimental validation is performed for a 1.0 kW laboratory prototype and the results obtained are detailed in the study. This proposed converter topology can be applied as a single-stage OBC or as a power factor correction converter with variable DC link voltages in isolated two-stage OBC. (a) Conventional two-stage layout of OBC, (b) Proposed single-stage converter, (c) Proposed converter as PFC in two-stage configuration

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

“…3 , the Fast-Charging Architectural design includes high-frequency transformers stages for AC-DC conversion and, while the dc bus design stage low-frequency transformer includes a specific AC-DC conversion stage. According to the SAEJ1772 standard, 600 v and 550 A of dc voltage in fast charging to charge the electric car in less than 10 min, the electric vehicle should be charged, and a quick charger should be put outside the vehicle [ 45 ].

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An intelligent converter and controller for electric vehicle drives utilizing grid and stand-alone solar photovoltaic power generation systems

“…Singh et al [19] proposed an integrated-on board charger in which the external sensors are not required for power factor correction due to nonlinear control techniques. Venkata and Williamson [20] proposed an onboard charger with buck and boost modes, and a dual-mode control strategy is used for voltage regulation and power factor correction and enables the smooth transition between the modes. Jain et al [21] proposed an incremental conductance-based MPPT algorithm in place of perturb and observation (P&O) algorithm, and the incremental conductance (INC) procedure is more competent and possesses higher tracking speed over varying solar irradiations.…”