The work was focused on the development of a working control law for SBC. It was considered that a sufficient voltage can be provided in the transverse (series full bridge) branch, such that the main H bridge can always operate in zero voltage switching. The role of the station transformer and its coupling was studied extensively, as well as the properties its inductance matrix should have to operate properly, with technical solutions proposed. Developed control laws have been used to demonstrate steady state operation of SBC under different set points using average simulation model.
The proposed control scheme can easily be applied to other series topologies, which share the same structural properties and are associated to the same difficulties.