Showing papers by "Mauricio B. R. Correa published in 2010"
18 Mar 2010
TL;DR: In this paper, batteries' models and state-of-charge monitoring procedures are evaluated and two models and three procedures were evaluated by using experimental data, and classified accordingly with their effectiveness.
Abstract: In this paper batteries' models and state of charge monitoring procedures are evaluated. Modeling of batteries are intended to assist designing of power electronics devices, while monitoring procedures are intended for a more effective State Of Charge (SOC) computing. It is worth noting that this still a hard task when working with lead acid batteries. Two models and three procedures were evaluated by using experimental data, and classified accordingly with their effectiveness.
23 citations
01 Nov 2010
TL;DR: In this paper, a modification in the algorithm introduced by Celanovic and Boroyevich is proposed, which reduces the computational effort for digital implementation and capacitor voltage balance in multilevel converters.
Abstract: In recent years, Multilevel Converters has become a promising technology for medium voltage applications. Nevertheless, when the number of levels increases, switching states selection becomes a hard task. The main concerns are with computational effort for digital implementation and capacitor voltage balance. Improvements in Pulse Width Modulation (PWM) strategies has been achieved thanks to researches contributions. This paper proposes a modification in the algorithm introduced by Celanovic and Boroyevich. In the new algorithm the coordinates transformation is not necessary, which reduces the computational effort. General concepts of PWM for multilevel converters are presented and, the new algorithm is presented and compared with the previous. Simulation based results are exploit to show that the algorithm is so effective as the previous solution. Experimental results illustrates a DSP control solution for an inverter up to 7-level.
15 citations
01 Nov 2010
TL;DR: In this article, an active control law for a current fed push-pull converter used in photovoltaic applications is discussed, which aims at avoiding magnetic flux saturation and eliminating the magnetic flux imbalance observed at both windings of the converter transformer.
Abstract: An active control law for a current fed push-pull converter used in photovoltaic applications is discussed in this paper. The proposed control law aims at avoiding magnetic flux saturation and eliminating the magnetic flux imbalance observed at both windings of the converter transformer. The most prominent advantages of operating without flux saturation are: a more effective magnetic core design; power switches and converter live endurance; less voltage switching stress. Detailed analysis including simulation and experimental results are used to demonstrate the effectiveness of the proposed active control law.
9 citations