Patent ID: 7439821

Claim:
A DC to DC transmission system comprising: a DC voltage source having a first voltage side and a second voltage side; a DC voltage sink having a first voltage side and a second voltage side; at least three conductors interconnecting the DC voltage source and the DC voltage sink, each of said conductors having a proximal end and a distal end; a first switch set comprising one respective switch for each one of the at least three conductors, each respective switch of said first switch set interposed between the DC voltage source and the proximal end of a respective one of the at least three conductors, each respective switch of said first switch set adapted to alternately couple the proximal end of a respective one of the at least three conductors to the DC voltage source first voltage side and to the DC voltage source second voltage side; a second switch set comprising one respective switch for each one of the at least three conductors, each respective switch of said second switch set interposed between the distal end of a respective conductor and the DC voltage sink, each respective switch of said second switch set adapted to alternately couple the distal end of a respective one of said conductors to the DC voltage sink first voltage side and to the DC voltage sink second voltage side; a second switch set controller adapted to sequentially switch said second switch set switches in a manner such that simultaneously at least one of said conductors is coupled to the DC voltage source first voltage side and the DC voltage sink first voltage side and at least another one of said conductors is coupled to the DC voltage source second voltage side and the DC voltage sink second voltage side.