US 12,088,094 B2
DC-power supply device, DC-powered device, and operating methods
Matthias Wendt, Würselen (DE)
Assigned to SIGNIFY HOLDING, B.V., Eindhoven (NL)
Appl. No. 17/293,169
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Nov. 1, 2019, PCT No. PCT/EP2019/079981
§ 371(c)(1), (2) Date May 12, 2021,
PCT Pub. No. WO2020/099152, PCT Pub. Date May 22, 2020.
Claims priority of application No. 18205675 (EP), filed on Nov. 12, 2018.
Prior Publication US 2022/0014019 A1, Jan. 13, 2022
Int. Cl. H02J 1/14 (2006.01); H02J 1/06 (2006.01); H02J 13/00 (2006.01)
CPC H02J 1/14 (2013.01) [H02J 1/06 (2013.01); H02J 13/00002 (2020.01); H02J 13/00006 (2020.01); H02J 13/0005 (2020.01)] 12 Claims
OG exemplary drawing
 
1. A DC-power supply device for supplying operational DC power to a plurality of DC-powered devices via a single twisted-pair wired bus, each DC-powered device operable in an initialization mode requiring a lower DC power amount than in a respective regular operation mode of the DC-powered device, the DC-power supply device comprising:
a power interface for providing, via the single twisted-pair wired bus, DC output power to the plurality of DC-powered devices that are connected in parallel via the single twisted-pair wired bus;
a DC-power-supply network communication unit configured to receive via the power interface by means of link layer discovery protocol (LLDP) communication, from the DC-powered devices connected via the single twisted-pair wired bus, respective DC-power requirement information indicative of a DC-voltage requirement and a DC-current requirement for operation of the respective DC-powered devices in their respective regular operation mode, wherein the DC-power requirement information comprises preferred voltage with resulting current requirements as well as all compatible voltages with the related maximum current values; and
a DC-power-supply control unit, which is configured:
to drive, operating the DC-power supply device in an initialization supply mode, delivery of a predetermined initialization DC output power amount via the power interface, wherein the initialization DC output power amount is suitable for driving the connected DC-powered devices in their initialization mode that includes transmission of the respective power requirement information for their respective regular operation mode to the DC-power-supply device via the single twisted-pair wired bus;
to determine from among a plurality of available DC output power amounts that the DC-power supply device is configured to supply in an operation supply mode, using the DC-power requirement information received from each of the plurality of DC-powered devices and a predetermined power-determination rule, an operational DC output power amount to be output via the output power interface, the operational DC output power amount having an operational DC voltage amount being suitable for powering operation of the plurality of DC-powered devices in their respective regular operation modes;
to subsequently drive, operating the DC-power supply device in the operation supply mode, distribution of the determined operational DC output power amount to the plurality of DC-powered devices via the power interface, such that the single twisted-pair wired bus is provided with a DC-voltage amount for powering each of the plurality of DC-powered devices; and
a DC-powered device detection unit is configured to detect, while the DC-power supply device is being operated in the operation supply mode, a new-connection event involving connection of an additional DC-powered device to the single twisted-pair wired bus, and a disconnection event involving disconnection of a previously connected DC-powered device from the single twisted-pair wired bus, and to provide a respective event detection signal indicative of the new-connection event or of the disconnection event; and wherein
the DC-power-supply control unit is further configured, while operating the DC-power supply device in the operation supply mode:
upon reception of the event detection signal indicative of the new-connection event, to maintain, for providing the initialization DC-power amount to the additional DC-powered device, a currently provided operational DC-voltage amount; and
upon reception of the event detection signal indicative of the new-connection event or of the disconnection event, to re-determine, based on the predetermined power-determination rule and on the DC-voltage requirements and the DC-current requirements of the DC-powered devices that are currently connected to the single twisted-pair wired bus, the operational DC output power amount to be output via the power interface.