In this paper, a reconfigurable non-isolated buckboost (BB) integrated full-bridge series resonant converter (FBSRC) based LED driver is proposed for wide input voltage automotive lighting applications. The proposed LED driver is derived by the integration of BB operation with FBSRC. It can be reconfigured into three different resonant converter topologies such as BB integrated FBSRC, BB integrated half-bridge series resonant converter (BB-HBSRC) and conventional HBSRC and hence produces 3 levels of voltage gains. By transformation from one topology to other based on the input voltage range and with APWM control, it can operate for wide input voltage range while maintaining the soft switching. The main advantages of the proposed configuration are smooth transformation into 3 different topologies without any additional switching devices, no topological transitions within a switching cycle in steady state, use of simple PI controller, soft switching and wider voltage gain with buck/boost operation. In addition, dimming control is also achieved using PWM technique. Detailed theoretical analysis of the proposed converter is presented. To verify the analysis and performance, a prototype of 22.7 W, 22.5 V LED driver is designed, simulated and tested for a wide input voltage range of 18 V to 120 V.

A wide range bidirectional dc-dc converter with quadratic boost voltage gain is proposed in this paper for hybrid energy source driven electric vehicles. The proposed converter is restructured such that in the forward path of buck and boost mode there exists only one semiconducting device. The benefits of stated converter are wide-voltage-range and absolute common ground. The steady state operation, voltage stress of semiconducting elements, comparison with other similar quadratic boost converters and closed loop control are presented in this article. A 200 W, 25 kHz, low voltage (VLV) input of 40 ̴ 120 V prototype is developed to validate the performance indices.

Over the past few years, there have been significant advancements in Microgrid (MG) systems, particularly in the field of power electronics. These advancements aim to address the needs of the grid and loads, while integrating low-voltage, non-linear, and highly sensitive power sources, such as solar PV modules, batteries, and supercapacitors. It is crucial to select the appropriate converter configuration and power converters in MG systems, as they greatly impact their optimal performance. To achieve the best results, numerous architectures and converter configurations have been suggested for integrating different energy sources. As a result, a considerable number of research articles have been published, necessitating a thorough review. This article continues studies of Part I and presents a comprehensive overview of various architectures based on the arrangement of different sources and provides a detailed analysis and discussion of these architectures. This article covers thirty-three different categories of DC-DC converters, both isolated and non-isolated. These converters are divided into subcategories, such as conventional type, switched-capacitor type, soft-switching type, multi-phase type, and multilevel type. The article also evaluates the suitability of these topologies based on factors such as high conversion gain, power decoupling, efficiency, isolation, power handling capabilities, and compact design. The critical examination and comparative study presented in this work can be valuable for industry professionals and academics in selecting the most suitable architectural and power converter topologies for optimal performance.

An ultra high gain quadratic boost converter based on switched-capacitor is proposed in this article. The ultra high gain is achieved with a low duty ratio and a wide range of flexibility. The proposed converter provides significantly reduced device voltage stress and source current ripple. This article presents in detail discussion on the operating principle, continuous conduction mode (CCM) and, discontinuous conduction modes (DCM) and the parasitics effect on the output voltage and efficiency of the proposed converter. Also, the stated converter performance comparison with similar quadratic boost dc-dc converters is presented. The performance indices of the proposed converter are verified by a prototype of 400 V, 50 kHz, 200 W, subsequently, the converter is also experimented for 800 V output with suitable elements to verify its performance feasibility for ultra voltage gain.