Abstract—The phase-shifted full-bridge (PSFB) converter
topology provides a platform which enables the achievement of
high power-density through low-loss operation at high
frequency. However, this topology is also subject to the risk of
flux imbalance in the main power transformer if precautions are
not taken to prevent its occurrence. This paper evaluates the
power-density implications of the several known mechanisms
described in the literature for ensuring flux balance in the
context of this converter topology. Additionally, the details of a
high-power PSFB prototype converter design are reported and
the performance of this system is used to evaluate the
practicality of implementing a novel technique for addressing
the volt-second balance issue without compromising the
converter bus design required to achieve higher power density.