Abstract:
DC Power distribution system The invention relates to a DC power distribution system (1), especially a track lighting system, comprising several power supply units(3) and an electrical consumer (4) like a luminaire electrically connected to an electrical conductor (2)being preferentially a power bar. Apower consumption information providing system providespower consumption information anda power supply control system controlsthe power supply units depending on the provided power consumption information. This allows adapting the DC power distribution tothe actually required power, i.e. several power supply units can be electrically connected to the electrical conductor, without providing DC power in an inefficient operation condition. Moreover, the installation of the DC power distribution system can be relatively simple, because the installer just needs to attach a number of power supply units to the electrical conductor, which surely prevents an overload condition, wherein the DC power can still be supplied with high efficiency.
Abstract:
A circuit that has one or more control units that divide a load into two or more load groups, with each load group comprised of at least one load element. The one or more control units directing power from a power source to one or more of the load groups based on voltage variations in an output of the power source, load grouping, and operational parameters of the load elements. The circuit further includes one or more pass stages that regulate current flow from the power source to the load groups.
Abstract:
A method is provided for allocating and providing power to network devices. The method includes (i) receiving an electronic request to power a network device with a requested amount of power, (ii) establishing a worst-case current draw of the device in the event of a pre-defined maximum voltage slew rate, and (iii) selectively (a) allocating and providing power to the device when a remaining power capacity is greater than or equal to a provision voltage multiplied by the worst-case current draw of the device in the event of the maximum voltage slew rate, and (b) denying power to the device when the remaining power capacity is less than the provision voltage multiplied by the worst case current draw of the device in the event of the maximum voltage slew rate. Apparatus are also provided for performing the method.
Abstract:
A digital power distribution system comprises a digital power transmitter configured to accept analog electrical power and to convert the analog electrical power into discrete energy packets for distribution across a common set of transmission lines; a plurality of digital power receivers with parallel connections to the transmission lines, wherein the digital power receivers are configured to accept the energy packets from the digital power transmitter and to convert the packets back into analog electrical power for use by the load device; a load device electrically coupled with at least one of the digital power receivers and configured to receive analog electrical power from the digital power receiver with which it is electrically coupled; and a termination module with parallel connections to the transmission lines, wherein the termination module includes at least a capacitor configured to establish the characteristic capacitance of the transmission lines.
Abstract:
A power adapter and a method for adapting power for electronic devices. Two or more input ports (101,103,105) are connectable to electrical power sources. An output port (109) is connectable to an electronic device. A controller (113) is in parallel power-receiving communication with the input ports (101,103,105), in power-providing communication with the output port (109), and in data-carrying communication between the output port (109) and a first one of the input ports (101). The method includes checking for electrical power at the first input port (101) and at least one other input port (103 or 105), and when electrical power is present at both, coupling the power from the input ports in parallel to the output port (109), and enabling data communication between the first input port (101) and the output port (109). The power adapter and the method enable the electronic device to draw power simultaneously from two or more sources while maintaining data communication with a host.
Abstract:
A system for detecting low voltage in an electric appliance having multiple loads (10) associated with drive switches (20) commanded by respective electronic controls (30) which are energized from a power source (40) connected to an electric network and which are operatively coupled to a command module (50). The system comprises: a compensating load (60), connected to the power source (40) and constructed to maintain constant the relation between the voltage of the electric network and the voltage of the power source (40), regardless of the number of loads (10) being energized; a control unit (70) associated with the command module (50) and with the compensating load (60), to define the current consumption to be produced by the compensating load (60), and a voltage sensing means (S) associated with the power source (40) and with the control unit (70) to promote the de-energization of the loads (10) when the voltage of the power source (40) is lower than a predetermined minimum value.
Abstract:
A power supply control system delivers regulated power to a load via a delivery cable. The power supply control system includes a power stage operable to deliver power to the load at a first regulated voltage level and a second regulated voltage level. A cable offset voltage unit generates an offset voltage signal representing a drop in voltage across the delivery cable. The offset voltage signal is generated based on a first cable drop compensation value when the power stage is operated to deliver power at the first regulated voltage level and based on a second cable drop compensation value when the power stage is operated to deliver power at the second regulated voltage level. A controller coupled to the power stage and the cable offset voltage unit controls the power stage to deliver the regulated power to the load based at least in part on the offset voltage signal.
Abstract:
A circuit that has one or more control units that divide a load into two or more load groups, with each load group comprised of at least one load element. The one or more control units directing power from a power source to one or more of the load groups based on voltage variations in an output of the power source, load grouping, and operational parameters of the load elements. The circuit further includes one or more pass stages that regulate current flow from the power source to the load groups.