3 results for “unbalanced current”

Set a search alert

Research ArticleOpen accessIn the keywordsExponential-Hyperbolic Model for Actual Operating Conditions of Three Phase Arc FurnacesMahdi Banejad, Rahmat-Allah Hooshmand, Mahdi Torabian EsfahaniProblem statement: The Electric Arc Furnace (EAF) is a non-linear load and creates power quality related problem. Therefore, accurate modeling of the EAF is essential. Approach: In this study, an optimal model for EAF in time domain called exponential-hyperbolic, was proposed to describe the behavior of the EAF for all of the operating conditions and it does not need the … …American Journal of Applied Sciences, Vol. 6, Issue 8 · 31 Aug 2009 · 7,247 accessesView PDF Cite

EditorialOpen accessIn the abstractRe-Paving the Road Built by Chemistry: A Challenge to Biochemistry and BiotechnologyAlberto A. IglesiasBiochemistry’s birth can be placed at the end of the nineteenth century, when Eduard Buchner made a clever interpretation of experimental observations on the generation of gas bubbles after addition (the original purpose was preservation) of sucrose to a yeast crude extract (Lagerkvist, 2005). Intelligently, Buchner concluded that the disaccharide had been fermented by broken cells’ suspension to produce CO2, … …American Journal of Biochemistry and Biotechnology, Vol. 11, Issue 1 · 26 Jan 2015 · 7,461 accessesView PDF Cite

Research ArticleOpen accessIn the abstractA Dynamic Voltage Restorer for Voltage Sag Mitigation in a Refinery with Induction Motors LoadsTarek I. El-Shennawy, Abdel-Mon’em Moussa, Mahmoud A. El-Gammal, Amr Y. Abou-GhazalaProblem statement: ANRPC is a refinery based in Alexandria, Egypt. The plant was subjected to several shutdowns due to tripping of large induction motors, either by under voltage or by over current relays, sometimes by the mechanical protection. The main cause for such unplanned shutdowns was voltage sags. The Dynamic Voltage Restorer (DVR) has recently been introduced to protect the … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 1 · 31 Mar 2010 · 8,922 accessesView PDF Cite