US Patent No. 10,172,214

POWER-OVER-ETHERNET POWER DISTRIBUTION SYSTEM


Patent No. 10,172,214
Issue Date January 01, 2019
Title Power-over-ethernet Power Distribution System
Inventorship Tony Petrus Van Endert, Eindhoven (NL)
Assignee PHILIPS LIGHTING HOLDING B.V., Eindhoven (NL)

Claim of US Patent No. 10,172,214

1. Power-over-Ethernet power distribution system, comprisinga plurality of lighting units for producing light according to illumination requirements, each lighting unit comprises a driver and a light unit for emitting light,
a plurality of Power-over-Ethernet switch units each having a plurality of ports, to which the lighting units are coupled via Ethernet cables, and a power supply unit for supplying power for the plurality of ports and the lighting units coupled to the ports,
at least one load management unit for controlling the power supplied to each of the lighting units coupled to the ports by managing the power supplied from the power supply unit, using the plurality of ports, to the lighting units to influence loads, which each of the lighting units represent at the ports by instructing at least one lighting unit to change its load, based on capabilities of the lighting units, positions of the lighting units, and the illumination requirements or constraints such that each of the plurality of Power-over-Ethernet switch units is operated at an optimized power efficiency by, based on the at least one lighting unit changed load, increasing a load to one port of the plurality of Power-over-Ethernet switch units and decreasing a load to another port of the plurality of Power-over-Ethernet switch units while maintaining the illumination requirement, and
wherein the load management unit is adapted to manage the power supplied to the ports of the plurality of Power-over-Ethernet switch units based on a) power efficiency and load characteristics of the power supply units and/or b) power factor and load characteristics of the power supply units.