A High Efficiency Modular EV Charger Using Bridgeless and Resonant Converters

Abstract

This paper presents a bridgeless totem pole boost converter (BLTPBC) fed synchronous full bridge inductor-inductor-capacitor (FBLLC) converter based electric vehicle (EV) charger as a fundamental building block for larger capacity EV infrastructure. This EV charger comprises of BLTPBC as a front-end power factor correction (PFC) converter followed by a high efficiency synchronous FBLLC converter for DC-DC conversion. The PFC TPBLB is operated in continuous inductor conduction mode at fixed frequency, while the control of synchronous FBLLC converter is performed using pulse frequency modulation (PFM). The performance of this EV charger is deeply analysed during steady state and transient conditions by a developed proto-type and are discussed and presented. The performance of this EV charger in a large EV structure composed by paralleling these chargers is also presented by virtue of its short circuit performance.