Research Article Sample-Data Modeling of a Zero Voltage Transition DC-DC Converter for On-Board Battery Charger in EV Teresa R. Granados-Luna, 1 Ismael Araujo-Vargas, 2 and Francisco J. Perez-Pinal 3 1 Coacalcos Institute of Tecnological Studies, 16 de Septiembre Avenue No. 54, Col. Cabecera Municipal, 55700 Coacalco de Berriozabal, MEX, Mexico 2 School of Mechanical and Electrical Engineering, National Polytechnic Institute of Mexico, ESIME Cul., Santa Ana Avenue No. 1000, Col. San Francisco Culhuacan, 04430 Coyoacan, DF, Mexico 3 Automotive Mechanical Engineering Department, Polytechnic University of Pachuca, Ex Hacienda de Santa Barbara, Carretera Pachuca Cd. Sahag´ un, Km. 20, 43830 Zempoala, HGO, Mexico Correspondence should be addressed to Ismael Araujo-Vargas; iaraujo@ipn.mx Received 30 November 2013; Accepted 5 February 2014; Published 2 June 2014 Academic Editor: Sheldon S. Williamson Copyright © 2014 Teresa R. Granados-Luna et al. Tis is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Battery charger is a key device in electric and hybrid electric vehicles. On-board and of-board topologies are available in the market. Lightweight, small, high performance, and simple control are desired characteristics for on-board chargers. Moreover, isolated single-phase topologies are the most common system in Level 1 battery charger topologies. Following this trend, this paper proposes a sampled-data modelling strategy of a zero voltage transition (ZVT) DC-DC converter for an on-board battery charger. A piece-wise linear analysis of the converter is the basis of the technique presented such that a large-signal model and, therefore, a small-signal model of the converter are derived. Numerical and simulation results of a 250 W test rig validate the model. 1. Introduction Advanced vehicular systems are based on the more electric systems (MES) concept. MES is the intensive application of power electronic converters (PEC), electric machines (EM), and advanced embedded control systems to aeronautical, automotive, and maritime systems. MES was initially applied to aeronautical systems toward the reduction and/or sub- stitution of mechanical, pneumatic, and hydraulic systems, that is, the more electric aircraf (mea) and totally integrated more electric systems (TIMES), [1]. MES are more efcient compared to their counterparts due to (i) small utilization of electric energy, (ii) high energy efciency, (iii) reduced weight, and (iv) low maintenance [2]. Afer that, MES was implemented in automotive sector resulting in the more electric vehicle (MEV). MEV includes electric vehicles (EV), hybrid electric vehicles (HEV), and plug-in hybrid electric vehicles (PHEV) [3]. In particular, MES applied to vehicular systems has become popular due to the market introduction of the HEV Toyota Prius in 1997 [4]. HEV are being developed by companies like BMW, Chrysler, Daimler AG, General Motors, PSA Peugeot Citroen, Suzuki Motor Corp, Toyota, and Volkswagen. Motivations to develop EV, HEV, and PHEV are based on economic, environmental, and energetic facts. Regardless of these kinds of confgurations, at least two diferent sources of energy are needed to achieve the same performance compared to an internal combustion engine (ICE). Indeed, at least one EM and PEC are needed in the propulsion stage at any EV, HEV, and PHEV confguration. Series, parallel, series/parallel, and integrated starter alter- nator (ISA) with its optional plug-in capability are typical confgurations available in the market. PHEV uses an of-board or on-board charger similar to EV. Te standard SAEJ1772 is used in North America and comprises three charge methods: AC level 1 (supply voltage varies from 120VAC 1-phase), AC level 2 (208V to 240VAC and 600V DC maximum; with a maximum current (amps- continuous) from 12A, 32A and 400A), and DC charging. Hindawi Publishing Corporation Mathematical Problems in Engineering Volume 2014, Article ID 712360, 15 pages http://dx.doi.org/10.1155/2014/712360