Gain-scheduled control of multi angle phase shift modulated dual active bridge series resonant DC/DC converters

This paper describes a feedback control approach for dual active bridge series resonant converters that makes use of gain-scheduling to improve the dynamic response of such topologies. The proposed approach uses recently developed small signal models to allow the dual active bridge series resonant converter to maintain phase margin and gain margin requirements over the entire operating range. The proposed method and its application are described, and a controller design example and experimental results are provided for a prototype 1 kW dual active bridge series resonant converter. Verification that the controller satisfies the design constraints is presented, and the gain-scheduling controller performance is compared to that of a constant gain feedback controller.