Hinaje M.,GREEN INPL |
Nguyen D.A.,GREEN INPL |
Bonnet C.,University of Lorraine |
Lapicque F.,University of Lorraine |
And 2 more authors.
International Journal of Hydrogen Energy | Year: 2011
A dysfunctioning of the heart of the fuel cell might affect the whole system, and thus the demand of electric power. To be able to estimate the damage of the fuel cell, the default has to be detected precisely. As it is well known, the physico-chemical processes involved in proton exchange membrane fuel cell (PEMFC) are strongly coupled, as such that putting apart a phenomenon by experimental measurement can be quite difficult. To this end, simulations of an online or offline diagnosis, for instance by electrochemical impedance spectroscopy (EIS) method are interesting. It can help also to analyze what happens locally in the heart of cell. The main aim of the presented work is to highlight the interest of using PEMFC dynamic model as a diagnosis tool. To illustrate this potential, EIS method has been implemented in 2D dynamic single cell in both simulated cases of defective and healthy cells. © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Sargos F.-M.,GREEN INPL |
Tounzi A.,University of Lille Nord de France
European Journal of Electrical Engineering | Year: 2012
This paper presents a diphase analytical modelling of salient pole synchronous machines aiming at studying 'accurately' the operating of these structures. Based on the Park transformation and the concept of forward and backward currents, the proposed model differs from usual approaches by the fact it introduces the e.m.f. into the different relations. This model is then used to study different motor and generator operating modes of salient pole synchronous machines and buried permanent magnet synchronous machines. The results confirm known practical results and also show a certain number of non trivial features. © 2012 Lavoisier.