Coupled-inductor-based power-device circuit topology

A method of controlling a power device comprising a first input to receive first AC input power having a positive cycle and a negative cycle, a second input to receive second input power and configured to be coupled to an energy storage device, an output to provide output power, an output circuit to provide the output power to the output, and a power conversion circuit including a primary branch portion having a first primary branch path including a first inductor and a second primary branch path coupled in parallel with the first primary branch path, and a backup branch portion having a second inductor, the second inductor being magnetically coupled to, and galvanically isolated from, the first inductor, the method comprising:

• providing, in a normal mode of operation and during the positive cycle of the first AC input power, a first current derived from the first AC input power to the output circuit through the first inductor and not through the second primary branch path, wherein the first current through the first inductor induces a first induced voltage across the second inductor;
• discharging, by the second inductor in the normal mode of operation, a second current derived from the first induced voltage to the energy storage device;
• drawing, in a backup mode of operation, a third current from the energy storage device through the second inductor, wherein the third current through the second inductor induces a second induced voltage across the first inductor;
• and
• discharging, by the first inductor, a fourth current derived from the second induced voltage to the output circuit.

A non-transitory computer-readable medium storing thereon sequences of computer-executable instructions for controlling a power device comprising a first input to receive first AC input power having a positive cycle and a negative cycle, a second input to receive second input power, an output to provide output power, an output circuit to provide the output power to the output, and a power conversion circuit including a primary branch portion having a first primary branch path including a first inductor and a second primary branch path coupled in parallel with the first primary branch path, and a backup branch portion having a second inductor, the second inductor being magnetically coupled to the first inductor, the sequences of computer-executable instructions including instructions that instruct at least one processor to control the power conversion circuit in the power device to:

• provide, to the first inductor and not through the second primary branch path in a normal mode of operation and during the positive cycle of the first AC input power, the first AC input power;
• provide, by the first inductor in the normal mode of operation, first power derived from the first AC input power to the output circuit;
• receive, by the second inductor in a backup mode of operation, the second input power;
• store, by the second inductor in the backup mode of operation, first stored energy derived from the second input power;
• store, by the first inductor in the backup mode of operation, second stored energy derived from the first stored energy;
• and
• provide, by the first inductor in the backup mode of operation, second power derived from the second stored energy to the output circuit.