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Helpful hints to enhance reliability of DC-DC converters in hybrid electric vehicle applications

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2 Author(s)
Ranjbar, A.H. ; Univ. of Texas at Arlington (UTA), Arlington, TX, USA ; Fahimi, B.

This paper presents a new method for reliability assessment of bi-directional dc-dc converters which are used in electric and hybrid electric vehicles (EV/HEV). The proposed technique takes into account random modes of operation dictated by the driving scenarios. In order to consider the stochastic nature of the driving, Federal Test Procedure (FTP-75) driving cycle is selected as the reference. A bench mark bi-directional dc-dc converter circuit along with a Hybrid Energy Storage System (HESS) is selected as the typical HEV DC-DC converter. The new method for reliability assessment of HEV DC-DC converters under random behavior of driver is presented using Monte Carlo simulation and part stress method.

Published in:

Vehicle Power and Propulsion Conference (VPPC), 2010 IEEE

Date of Conference:

1-3 Sept. 2010