Multiple-port bidirectional converter and control method thereof

A method of controlling a DC-DC converter having a plurality of stages including first, second and third stages, the method comprising acts of:

• measuring a plurality of electrical properties of the DC-DC converter;
• determining a switching frequency, phase delay, and phase shift based at least in part on the measured plurality of electrical properties;
• switching a first plurality of switches of the first stage at the switching frequency;
• switching at least two of a second plurality of switches of the second stage at the switching frequency, time shifted by the phase delay relative to switching of at least one of the first plurality of switches;
• and
• switching at least two of a third plurality of switches of the third stage at the switching frequency, time shifted by the phase shift relative to switching of at least one of the first plurality of switches.

A multiple-port converter, comprising:

• a transformer having a first winding, a second winding and a third winding;
• a series resonant converter formed by a first power stage and a second power stage;
• and
• a dual active bridge converter formed by the first power stage and a third power stage, wherein the first power stage is wired to the first winding, the second power stage is wired to the second winding, and the third power stage is wired to the third winding.