Analysis, design and implementation of an isolated full-bridge converter for battery charging

This paper purposes the development of an isolated battery charger. In energy storage systems, these devices are essential, performing batteries charging in the way to maintain their lifecycle and safety since they are main responsible for the costs associated with these systems. In many works theses circuits are implemented through bidirectional Full-Bridge converters. These converters require auxiliary circuits to reduce their switching losses. However, circuits such as snubbers or voltage clampers are not adequately addressed in these works since their use is undesirable for bidirectional operation. To eliminate these circuits in isolated converters, this work presents a switching technique applied in a Full-Bridge converter with the objective to reduce overvoltage in semiconductors and make it suitable for use in bidirectional converters, as in the charge of battery banks.