Abstract: A Plug in hybrid electric vehicle is a hybrid vehicle with a storage system that can be recharged by connecting a plug to an external electric power source. The charging ac outlet inevitably needs an onboard ac dc charger with power factor correction. The two stage approach with cascaded PFC ac–dc and dc–dc converters is the common architecture of choice for PHEV battery chargers, where the power rating is relatively high, and lithium ion batteries are used as the main energy storage system. In the two stage architecture, the PFC stage rectifies the input ac voltage and transfers it into a regulated intermediate dc link bus. At the same time, PFC is achieved. Phase shifted semi bridgeless ac dc converter is proposed to simplify the current sensing technique for semi bridgeless PFC converter. The converter features high efficiency at light loads and low ac input lines, which is critical to minimize the charger size, charging time, and amount and cost of electricity drawn from the utility. The converter is ideally suited for residential charging applications.

Keywords: AC–DC power converters, boost converter, bridgeless power factor correction (PFC), current sensing, plug-in hybrid electric vehicle (PHEV) charger.