US Patent 10396662 Direct current link circuit

A device for converting power from a floating source of DC power to a dual direct current (DC) output, the device includes: positive and negative input terminals connectable to the floating source of DC power; and positive and negative, and ground output terminals connectable to the dual DC output that may feed an inverter. The inverter may be either a two or three level inverter. A charge storage device may be connected in parallel to, and charged from, the positive and negative input terminals. A resonant circuit may be also connected between the charge storage device and the dual DC output. The resonant circuit may include an inductor connected in series with a capacitor. The charge storage device may discharge through the resonant circuit by switching through to either the negative output terminal or the positive output terminal.