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Facing various issues on the recent environment and the exhaustion of fossil fuels, engineers have been engaged in the development of electric-powered drive trains in order to convert automotives of conventional internal-combustion engines(ICE) into more friendly environmental systems. New technologies not only electric-powered drive train systems but also electric-powered chassis train systems such as electric-powered brake systems, i.e., the so-called x-by-wire system, and also idling stop systems have emerged in the course of the development. The importance of electric power supply systems has been increasing as an automotive infrastructure which supports both the electric-powered and electronic control systems, and according to increasing levels of demand for the high capacity, the high efficiency, and the high reliability of electric power supply systems, the supply systems have innovated. Furthermore electronic control systems in order to operate safely these electric powered systems under optimum conditions have made steady progress through the development of IT technologies. The evolutions and the constructions of electric power systems for automotives are to be positioned as the development of an electric micro-grid being compatible with ICE . Further, due to the development of plug-in hybrid electric vehicles(PHEV) and electric vehicles(EV), an issue in the harmony between this electric micro-grid and the social infrastructure concerning an electric power supply from the outside of vehicles has arised. Domestic and international trends have been investigated by considering these situations and focusing on technologies for integrating these electric power supply systems, and issues and their solutions have been organized. These investigation activities have been conducted from 2010 to 2011. |
