v63-3 - World Academy of Science, Engineering and...

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Abstract— This paper will focus on modeling, analysis and simulation of a 42V/14V dc/dc converter based architecture. This architecture is considered to be technically a viable solution for automotive dual-voltage power system for passenger car in the near further. An interleaved dc/dc converter system is chosen for the automotive converter topology due to its advantages regarding filter reduction, dynamic response, and power management. Presented herein, is a model based on one kilowatt interleaved six-phase buck converter designed to operate in a Discontinuous Conduction Mode (DCM). The control strategy of the converter is based on a voltage- mode-controlled Pulse Width Modulation (PWM) with a Proportional-Integral-Derivative (PID). The effectiveness of the interleaved step-down converter is verified through simulation results using control-oriented simulator, MatLab/Simulink. Keywords— Automotive, dc-to-dc power modules, design, interleaved, Matlab\Simulink and PID control . I. INTRODUCTION switching converter is an electronic power system which transforms an input voltage level into another for a given load by switching action of semiconductor devices. A high power efficient dc-dc converter is strongly desired and has found widespread applications. Examples include aerospace [1], sea and undersea vehicles [2], electric vehicles (EV), Hybrid Electric Vehicle (HEV) [3], portable electronic devices like pagers [4], and microprocessor voltage regulation [5]. In dual-voltage vehicular electrical systems, the dc-to-dc converter is required to step-down the high-voltage to provide back up compatibility for the existing low-power devices such as lamps, small electric motors, control units and key-off load (clock, security system). A schematic of the 42V/14V dc-to-dc converter architecture is shown in Fig.1, with the possibility of either single or a dual battery (12V and 36V). The aim of the 42V/14V architecture of Fig.1 is to reduce the cost, weight and packaging space created by the additional 12V energy storage battery. Ideally, the power management system should be smart enough to manage the key-off loads from depleting the high voltage battery to the point that the car cannot be started M. A. Shrud is with High Institute of Electronic Professions, Tripoli, Libya (mshrud@hotmail.com). A. H. Kharaz is with the School of Technology, University of Derby, Derby, UK (e-mail: a.kharaz@derby.ac.uk). A. S. Ashur is with Alfateh University, Tripoli, Libya (e-mail: a.ashur@hotmail.co.uk) . A. Faris is with the University of Derby, Derby, UK (e-mail: a.faris@derby.ac.uk). M. Benamar is with Libyan Civil Aviation, Air Navigation Department,Tripoli-Libya (e-mail: benammar11@hotmailcom). [6]. The philosophy behind dual battery system architecture is
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v63-3 - World Academy of Science, Engineering and...

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