The purpose of this project was the modeling, optimization and prediction of a hybrid system composed of a fuel cell, a dc-dc converter and a supercapacitor in series. Lab tests were performed for each device to understand their behavior, and then each one was modeled using software (Simulink). The validation of the model was done by comparing its results with measured data; finally the model w...

In this paper, it is demonstrated that low frequency noise measurements are an efficient tool for the detection of latent defects induced by CDM stress in a complex circuit such as a DC-DC converter. This technique is able to detect the presence of a defect whereas classical electrical testing techniques such as Iddq or functionality test fail. In addition, a correlation between the noise signa...

The last few years, a considerable number of studies have been made on a digital control. One reason is that this technique will lead to a future energy management and system integration. At a first step, it may be helpful to begin with a study of the design criterion of the digital control. Although studies have been made on the digital unique characteristics, there is little agreement on the ...

Abstract Three local bifurcations in DC-DC converters are reviewed. They are period-doubling bifurcation, saddle-node bifurcation, and Neimark bifurcation. A general sampled-data model is employed to study types of loss of stability of the nominal (periodic) solution and their connection with local bifurcations. More accurate prediction of instability and bifurcation than using the averaging ap...

This paper presents a new solution approach to the optimal control problem of fixed frequency switch-mode DC-DC converters using hybrid systems methodologies. In particular, the notion of the N -step model is introduced to capture the hybrid nature of these systems, and an optimal control problem is formulated and solved online, which allows one to easily incorporate in the controller design sa...

coupling. In these GBJJ, the grain boundary which Since the discovery of High Tc Superconductivity constitutes the barrier is a weak superconducting at the end of 1986 [1], great attention has been paid region which is oxygen deficient andyor disordered. to the investigation of the action of light on High Tc Then, illumination of such junctions will change the Superconductors (HTSC). Besides th...

This article provides a classification of high efficiency switching power-gyrator structures and their use as cells for energy processing in photovoltaic solar facilities. Having into account the properties of these topologies presented in the article, their inclusion in solar facilities allows increasing the performance of the whole installation. Thus, the design, simulation and implementation...

Stable inversion plays a key role in the solution of the exact tracking control problem in nonminimum phase systems. However, the general methods developed so far for the computation of stable inverses require backwards time numeric integration of the internal dynamics equation, which yields high sensitivity to external disturbances and/or structured uncertainties. This article introduces an it...

Single phase power factor correction ac-dc converters are widely used in industry for ac-dc power conversion from single phase ac mains to an required output dc voltage. In case of high power application these types of converter use an ac-dc boost converter followed by dc-dc converter. These converters has the features of excellent input power factor, continuous input and output currents, and i...

The class of Deterministic Conditional Term Rewriting Systems (DCTRSs) is of utmost importance for the tight relationships exhibited with functional programming, logic programming and inductive reasoning. However, its analysis is extremely diicult, and to date there are only very few works on the subject, each analyzing a particular aspect of DCTRSs. In this paper, we perform a thorough analysi...