Evaluation of Human Exposure οwing to Wireless Power Transfer Systems in Electric Vehicles
Résumé
This paper presents a general overview of wireless power transfer systems (WPT) for charging batteries in electric vehicles (EV), focusing on human exposure surveys. After describing the schematics and strategies of the two WPT problems, static (stationary parking) and dynamics (road travel), we examined the problem of exposure to radiation fields attributable to WPT systems in humans and more generally living tissues. We first study how to predict these radiated fields and examined their compliance with international standards. A model used the human body derived from magnetic resonance imaging and high resolution. It was also developed a mode by numerical computations with the method of the finite elements. An exposure assessment of a characteristic wireless inductive charging system was provided to estimate the induced electromagnetic fields. We counted the worst configuration for the exposure assessment of the wireless charging system. In a second step, we studied the sensitivity of the exposure level, taking into account the uncertainty of the parameters characterizing the electromagnetic problem. Stochastic models, helped study exposure level of an inductive power transfer system. Two non-intrusive approaches were associated with a 3D finite element method to construct adequate meta-models: the Kriging and Polynomial Chaos extensions. These two techniques proved to provide powerful tools for characterizing human exposure at 85 kHz, which is a typical frequency of inductive charging of electric vehicles.
Origine | Fichiers éditeurs autorisés sur une archive ouverte |
---|