Analysis of the Half-Bridge Converter with Current Doubler for Application in an Auxiliary Power Module of Electric Vehicles

Various technologies are being researched to improve, develop and innovate electric vehicles. In combustion vehicles, an alternator is needed to power the low voltage (LV) battery, but in electric vehicles this equipment is replaced by a small DC-DC converter, which can also be called as Auxiliary Power Module (APM). In electric vehicles, the APM is a DC-DC converter that has the primary function of supplying power to the low-voltage battery and, consequently, to the entire 12 V system of the vehicle. With the advancement of technology and connectivity, a power demand around of 3 kW is expected for these converters. In this context, the APM should be an isolated converter with high efficiency to increase the reliability and autonomy of the electric vehicle. Therefore, this paper presents a generalized half-bridge converter with a current doubler (HB-CD) that can be an alternative for this APM.