Patent ID: 8837170

Claim:
A passive resonant bidirectional converter system that transports energy across a galvanic barrier comprising: a converter using at least first and second converter sections, each section including a pair of transfer terminals, a center tapped winding; a chopper circuit interconnected between said center tapped winding and one of said transfer terminals; an inductance feed winding interconnected between the other of said transfer terminals and said center tap and a resonant tank circuit including at least the inductance of said center tap winding and the parasitic capacitance of said chopper circuit for operating said converter section at resonance; the center tapped windings of said first and second converter sections being disposed on a first common winding core and said inductance feed windings of said first and second converter sections being disposed on a second common winding core for automatically synchronizing the resonant oscillation of said first and second converter sections and transferring energy between said converter sections until the voltage across the pairs of transfer terminals achieves the turns ratio of the center tapped windings.