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Hirota M.,Automotive Technology RandD Laboratories | Baba T.,Automotive Technology RandD Laboratories | Zheng X.,Automotive Technology RandD Laboratories | Nii K.,Automotive Technology RandD Laboratories | And 3 more authors.
SEI Technical Review | Year: 2011

As a global warming countermeasure, reduction of carbon dioxide and improvement of fuel efficiency have become increasingly important. Recently, automotive manufacturers have been developing not only hybrid electric vehicles (HEV), but plug-in hybrid electric vehicles (PHEV) and electric vehicles (EV), which are more effective on carbon dioxide reduction. The vehicles, such as PHEV and EV, have an AC/DC converter which supplies electric power from a commercial power system to an onboard high-voltage battery, in addition to a DC/DC converter which generates electric power for the accessory. Because of the shortened charging time and restricted space, AC/DC converters require efficiency improvement and downsizing. We have been developing reactors, which are the key parts for high-efficiency and downsized AC/DC converters. This paper reviews the high-efficiency and downsized AC/DC converter that we have developed by applying our unique transformer-less insulation circuit.

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