Dual Active Bridge Open Loop Control with Analytic Equations Including Parasitic Influences

Description

The dual active bridge was first introduced over thirty years ago. Since then it has established itself as one of the dominant topologies for high power dc-dc conversion with galvanic isolation. This thesis focuses on the control of the dual active bridge for high frequency and power applications utilizing wide band-gap semiconductors. The high switching frequency and device characteristics of such semiconductors increase the impact of some parasitic effects which need to be accounted for when opting for an open-loop control approach. The open-loop control concept is verified by measurements with dc-dc and ac-dc dual active bridge converter prototypes at high frequency (up to 100 kHz) and high power (up to 20 kW).