POWER MANAGEMENT OF AIRCRAFT SEAT POWER USING A SMART POWER DISTRIBUTION CONNECTOR
In an aircraft seat power system, a Smart Power Distribution Connector (PDC) connects a power supply to multiple power outlets. Power to each outlet is monitored and controlled directly by the PDC that is in turn monitored and controlled by the power source. The power source and the PDC share a communication bus through which instructions and responses are communicated. The PDC has the ability to communicate with the outlets by sending instructions and monitoring and acting on the responses from the outlets. The system allows for power management from a supply of limited power. The PDC can provide current limiting, allowing the use of lighter weight and smaller wire and other components.
1 . A power supply system comprising:
a power distribution connector (PDC) configured to be connected to a DC power supply and configured to deliver DC power to at least one outlet which in turn is capable of supplying the delivered DC power to a DC load; and
a communication bus that is configured to connect the PDC and the at least one DC outlet.
2 . The power supply system of claim 1 , wherein the PDC is configured to be set with a maximum power limit that may be modified via a communication link to the power supply, by a command from the power converter, by an aircraft level power command via an aircraft system power bus, or by another control input or from a pay-for-power system.
3 . The power supply system of claim 2 , wherein the PDC comprises a microcontroller configured to communicate with the at least one DC outlet, to control said DC outlet to reduce its consumption of power, and to renegotiate a new power contract when power consumption by the at least one DC load reaches or exceeds the maximum power limit.
4 . The system of claim 2 , wherein the PDC is additionally configured to deliver DC power to a low-power DC load in a seat group on an airplane, the low-power electronic device drawing 100 W of power or less and selected from the group consisting of a seat actuator, a reading light, an inflight entertainment system, a wireless transmitter/receiver, a sensor, and a device that draws power via a USB outlet.
5 . The system of claim 4 , wherein the DC power supply is capable of receiving power from a power bus on an aircraft.
6 . The system of claim 4 , wherein the PDC is capable of receiving power from an aircraft generator.
7 . A method of power management, comprising the steps of:
providing a DC power supply;
providing a PDC interposed between the DC power supply and at least one DC load, the PDC electrically and communicatively connected to the at least one DC load via a bus;
presetting the PDC with a maximum power limit; and
instructing the at least one DC outlet to limit its power supply capability and to renegotiate new power contracts when the power consumption by the at least one DC load reaches or exceeds said maximum power limit.
8 . The method of claim 7 , further comprising the step of modifying the maximum power limit via a communication link to the power supply, by a command from the power converter, by an aircraft level power command via an aircraft system power bus, or by another control input such as from a pay-for-power system.