A floating-output interleaved boost DC–DC converter with high step-up gain

Abstract

A new interleaved boost converter with high step-up gain is presented in this paper. The proposed topology integrates coupled inductors and floating-output capacitors technique into interleaved boost converter to provide high step-up voltage gain without extreme duty cycle. The voltage stress on the power switches and diodes is very low, so low-cost and highperformance semiconductor devices can be employed. Also, the reverse recovery problem of all diodes is mitigated and zero-current-switching (ZCS) turn-on operation of the main switches is established as well. In addition, the passive clamp circuits are employed to suppress the voltage spikes across the main switches during turn-off instants. The operating principles and steady-state analysis of the proposed converter in continuous condition mode are explained. Finally, the simulation and experimental results of prototype 25-400 V circuit with 200 W output power are provided to verify the performance of presented topology.

A brief review on microgrids: Operation, applications, modeling, and control

“…Microgrid modeling varies according to their configurations, as a result of the applied components therein. 128,129 Various models for MG are mentioned in various references. According to Figure 7, modeling techniques for MG are divided into four groups: (a) modeling on and after collection, (b) integrated lattice model or total MG unit, (c) stochastic/predictive modeling methods, and (d) principles of dynamic equation modeling.…”

An adaptable interleaved DC-DC boost converter

“…This showed that at around 140W output the efficiency was 95% on the simulation and 93% on the test circuit. Another version of the coupled inductor interleaved boost converter is offered by [63] in Figure 1.18. This takes the conventional coupled inductor topology (Figure 1.10) and doubles it up to get more boost capability.…”

“…One common feature of all the proposed topologies covered in this section is the use of extra components to achieve higher boost ratios and/or reduce losses through various methods. While coupled inductors have become a popular feature for many recent topologies, they have mainly been accompanied by additional circuitry such as voltage multiplier circuits [41,[60][61][62][63] and storage capacitors [30,37,47,64,64,65,65]. In Section 1.0.12 a new approach is explored where focussing on the coupled coils and magnetic assembly is used to achieve a simple and efficient converter.…”

Development of Electrothermal Models for Electrical Traction

“…In [8], Mohamed Kabalo proposes a four-phase floating interleaved boost converter (FIBC). As the same work for [9][10][11], Christopher D. Lute et al provide an experimental evaluation of a four-phase floating interleaved boost converter for a photovoltaic power system application. However, the principle switches of the proposed converter have a higher voltage stress; therefore, it influences negatively in the output voltage response.…”