Bilateral chopper of resonant converter employing zero current switch with saturable inductor

With the advancement of various devices for high performance, many superior circuit technologies have been also studied. One of main streams concerns a soft switching technology to mitigate switching stress, leading to the reduction in switching losses or electro-magnetic noise. On the other hand, as a characterized orthodox technology, the existing chopper circuit is used for the electric vehicles, etc. Such technologies have a tendency to go out of vogue as power supplies for like electric trains. However, as a boost chopper for the battery charger for an electric vehicle and the like, those technologies become a main stream, where a bilateral function is required. With the foregoing in mind, the authors have devised and analyzed the bilateral chopper using the soft-switch technolog. As a resonant component, a novel saturable inductor method is proposed and discussed, where peak current or voltage can be suppressed.