Abstract: A redundant power distribution system and method of operation for transferring electrical power from one of several power sources to a load are disclosed. The system comprises one or more copies of a switching circuit with each switching circuit connectable to a power source. Each switching circuit monitors a voltage representative of its power source. The voltage being delivered to the load is also monitored by each switching circuit to detect a failed-open switching circuit. Arbitration is performed among the switching circuits detecting healthy power sources to select one power source to drive the load. Once a switching circuit has won arbitration, it continues to transfer power to the load until its power source fails or the switching circuit itself fails. The hardware can be partitioned in many ways.

Abstract: A redundant power distribution system and method of operation for transferring electrical power from one of several power sources to a load are disclosed. The system comprises one or more copies of a switching circuit with each switching circuit connectable to a power source. Each switching circuit monitors a voltage representative of its power source. The voltage being delivered to the load is also monitored by each switching circuit to detect a failed-open switching circuit. Arbitration is performed among the switching circuits detecting healthy power sources to select one power source to drive the load. Once a switching circuit has won arbitration, it continues to transfer power to the load until its power source fails or the switching circuit itself fails. The hardware can be partitioned in many ways.

Abstract: A 2N redundant power system and method is disclosed that uses cross-coupled AC power transfer. Two cross-coupled AC Transfer switches always connect power converting hardware to an active AC source so that the 2N redundant power system prevents changes in the operating conditions when the loss of one AC source occurs. The system includes a first power source for providing power to a load through a first branch, a second power source for providing power to the load through a second branch and a pair of AC transfer switches cross-coupling the first power source to the second branch when a failure to the second power source is detected, and vice versa. A first and second contactor arrangement each include a first contactor and a second contactor connected in series. A control circuit includes a first coil system for controlling the first contactor arrangement, a second coil system for controlling the second contactor arrangement, and a coil system selection circuit.