Abstract: Electrical power systems for distributing electrical power in aircraft are described. One such electrical power system comprises: an electrical power source configured to output a number R?2 of dc power channels, each dc power channel having a respective index r=(1, . . . , R); and a group of N dc load channels connected to the R dc power channels by a switching arrangement, wherein N>R and each dc load channel has a respective index n=(1, . . . , N). The system further comprises, for each respective one of a plurality of the N load channels, a current limiting device (CLD) operable to limit an amount of current flowing from the power channels to a load connectable to the electrical power system via the respective load channel. The electrical power source may comprise one or more batteries.

Abstract: Methods of energizing converters, and converter stations thereof, based on a mix of half-bridge (HB) converter cells and full-bridge (FB) converter cells are provided. According to one embodiment, a method for energizing a converter may include establishing a direct electrical connection between DC terminals of a converter, electrically connecting the converter to an AC power source via AC connectors and obtaining, from the AC power source and for a certain period of time, an AC voltage between two electrical phase lines for charging capacitors of the FB cells connected to the two electrical phase lines. Accordingly, the FB cells will be charged to a higher value and they may be controlled for charging capacitors of the HB submodules to at least a minimum voltage required to start switching devices of the HB submodules by drawing power from the AC power source.

Abstract: A resistor bypass circuit for a series lighting circuit includes a plurality of serially connected light sources and a bypass resistor being connected in parallel with at least one of the respective light sources, each respective light source being low wattage and being capable operating on a one hundred percent duty cycle as desired.

Abstract: A modular substation (10) for subsea applications includes a plurality of modular DC/AC converters (32) configured for converting DC electrical power transmitted along a DC transmission link (24) into AC electrical power for supplying to a plurality of subsea loads (56). The plurality of modular DC/AC converters (32) is configured to couple in series to the DC transmission link (24) and couple in parallel to an AC distribution network (52). At least a first modular DC/AC converter (32) is configured to be selectively electrically and mechanically disconnected from the DC transmission link (24) and the AC distribution network (52) to facilitate maintenance of the first modular DC/AC converters (32) while the AC distribution network (52) continues to supply AC electrical power to at least one of the plurality of subsea loads (56). The modular substation (10) also comprises protection and bypass circuits (26) intended to isolate faulty DC/AC converters (32) and to facilitate safe maintenance and repair.

Abstract: A scalable DC power distribution and control system suitable for commercial buildings includes one or more power and control hubs. Each DC power and control power hub provides power and control for any suitable distributed DC loads such as light-fixtures. AC power from the electric utility is applied to the power and control hub and is converted to DC power for distribution to DC loads within the space using low-voltage cables.

Abstract: A modular solar panel system facilitated to maximize the power generation from a solar module, configured to maximize power generation from a plurality of solar cells under conditions of partial shade or light obstruction. The modular solar panel system includes a crisscross network configuration of solar cell arrays, wherein the solar cells are often subjected to at least partial shading and wherein the present invention provides innovative configurations to minimize the damage inflicted by the shadows.

Abstract: An illuminated light socket is provided for powering a light bulb in a typical light string system. The illuminated socket contains its own lighting element, separate and distinct from the light bulb. The lighting element remains off when the light bulb is inserted into the socket and is illuminating properly. The lighting element illuminates when either the bulb is removed from the socket or the bulb is not illuminating correctly. The illuminated light element provides a visually perceptible warning, on the socket itself, that the associated light bulb is either absent or defective. Alternatively, a collar performing the same function is provided such that the collar may be mounted to existing light sockets. The illuminated sockets and housings may accommodate light bulbs of any technology, e.g. incandescent, LED (single or multiple color), or electroluminescent. The socket lighting element itself is preferably a low power LED or electroluminescent light.

Abstract: The inventive concept relates to a system supplying a constant current direct current power to serial loads connected in series with one another. The inventive concept is constituted by a constant current source power supply unit outputting a predetermined direct current, a load connection unit having the same rated current characteristic as the constant current source, a load connection unit having a rated current characteristic smaller than the constant current source, a load connection unit having a rated current characteristic greater than the constant current source, a load connection unit having a rated current characteristic greater or smaller than the constant current source and a circuit controlling or protecting them.

Abstract: In one embodiment, the instant invention can provide a harmonic mitigating device that can include at least the following components: an active filter; a passive filter; c) at least one control switch, where the at least one control switch operationally controls whether the at least one active filter or the at least one passive filter can be utilized by the harmonic mitigation device to mitigate at least one harmonic current flow, and where the at least one control switch operationally switches the harmonic mitigation device from utilizing the at least one active filter to utilizing the at least one passive filter when a current load exceeds a predetermined percent of a full current load.

Abstract: In an inverter apparatus, an output voltage of an active filter circuit that steps up and smoothes a DC voltage is converted into an AC voltage by an inverter circuit. The active filter circuit includes a capacitor and a rectifier device connected between an input node and an output node. An inductor, one end of which is connected to the input node and the other end of which is connected the output node through the rectifier device, and a switch device connected between the other end and a low-potential-side line, and a first control circuit for the switch device are provided. The inductor stores energy while the switch device is on and releases the energy while the switch device is off. The rectifier device conducts such that the stored energy of the inductor is released.

Abstract: An SNMP network comprises a power manager with an SNMP agent in TCP/IP communication over a network with an SNMP network manager. The power manager is connected to control several intelligent power modules each able to independently control the power on/off status of several network appliances. Power-on and load sensors within each intelligent power module are able to report the power status of each network appliance to the SNMP network manager with MIB variables in response to GET commands. Each intelligent power module is equipped with an output that is connected to cause an interrupt signal to the network appliance being controlled. The SNMP network manager is able to test which network appliance is actually responding before any cycling of the power to the corresponding appliance is tried.

Abstract: A control circuit (20) comprising: first and second terminals (22,24) for respective connection to first and second power transmission lines (26,28); a current transmission path extending between the first and second terminals (22,24) and having first and second current transmission path portions (30,32) separated by a third terminal (34), either or both of the first and second current transmission path portions (30,32) including at least one module (36), the or each module (36) including at least one energy storage device; an auxiliary terminal (42) for connection to ground or the second power transmission line (28); an energy conversion block for removing energy from the power transmission lines (26,28), the energy conversion block extending between the third and auxiliary terminals (34,42) such that the energy conversion block branches from the current transmission path, the energy conversion block including at least one energy conversion element (44); and a control unit (46) which selectively removes the

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: The placement of fully available prime movers having a DC output at a location inside or adjacent to an inverter-based intermittently available renewable energy site is disclosed. The fully available prime movers add reliability to an unreliable energy asset that is reaching its maximum penetration within the grid due to its unpredictability and the requirement for additional spinning reserves in other parts of the grid. The present invention can provide a portion or all of the power to an intermittently available renewable power generating facility so that the power output to the power grid is dispatchable power. In particular, a method and means are disclosed to utilize high-efficiency engines operated on various fuels some of which may be non-fossil fuels to maintain a constant power output from an otherwise intermittent power generating facility.

Abstract: According to one embodiment, a plurality of first saturable units respectively include input sections connected to an output side of a constant current power supply apparatus in series to one another and respectively supply outputs to loads corresponding thereto. A second saturable unit includes an input section and an output section, the input section being connected to the input sections of the first saturable units in series. An abnormality detecting unit monitors a state of the load of at least one of the first saturable units, closes the output section of the second saturable unit during normal time, and opens the output section of the second saturable unit during abnormal time.

Abstract: A building power management system employs a power manager and a plurality of load circuits (e.g., outlet circuits, appliances, equipment, etc.). In operation, the power manager senses (directly or indirectly) a source voltage at a power source node, sheds one or more of the load circuits from a power source node in response to the source voltage sagging below a source voltage limit, and reconnects shedded load circuit(s) to the power source node upon the source voltage exceeding the source voltage limit. Further, the program manager senses (directly or indirectly) a source current flowing through the power source node, sheds one or more of the load circuits from the power source node in response to the source current exceeding a source current limit, and reconnects shedded load circuit(s) to the power source node upon the source current sagging below the source current limit.

Abstract: A VSC converter includes in each valve one first semiconductor device of turn-off type with a voltage blocking capacity rating of a first, high level and connected in parallel therewith a series connection of a plurality of second semiconductor devices of turn-off type with a voltage blocking capacity rating of a second, lower level. A control arrangement of the converter is configured to switch a said valve into a conducting state starting from a forward biased blocking state of the valve by controlling the second semiconductor devices to be turned on and then the first semiconductor devices to be turned on with a delay, and at the end of the conducting state to turn off the first semiconductor device in advance of turning the second semiconductor devices off.

Abstract: A system and method for proportioned power distribution in arrays of power converters are disclosed. According to one embodiment, a method includes distributing a node-specific transfer function to each node of a plurality of nodes via a communication bus. Each node includes a power converter, and nodes of the plurality of nodes are electrically connected in series. Each node-specific transfer function enables each node to contribute a positive impedance to a total impedance of the plurality of nodes. The computer-implemented method further includes coordinating a setting of a parameter of each node-specific transfer function to regulate a common bus current across the plurality of nodes, and assigning to each node an electrical characteristic based on a parameter of each node-specific transfer function.

Abstract: An electronic medium with an integrated circuit includes a power feeding terminal pair including a first power feeding terminal and a second power feeding terminal, an integrated circuit including at least one first rectifying circuit, and a second rectifying circuit that is separate from the integrated circuit, wherein the first rectifying circuit and the second rectifying circuit are connected in series between the first power feeding terminal and the second power feeding terminal.

Abstract: In order to assure drive of a drive motor, a boost operation of a boost device is appropriately performed by judging whether a voltage supplied from a fuel cell suffices a voltage required for driving the drive motor, thereby suppressing a switching loss by the boost device. A fuel cell system is a power source for driving a load. The system includes: a drive motor driven by an electric power; a fuel cell which generates electricity by an electrochemical reaction between an oxidizing gas containing oxygen and a fuel gas containing hydrogen and supplies an electric power to the drive motor; a first boost device which can boosts the voltage outputted from the fuel cell and supplies the boosted voltage to the drive motor; and boost control means which controls voltage boost performed by the first boost device according to the relationship between the fuel cell output voltage and the voltage required by the drive motor.

Abstract: An SNMP network comprises a power manager with an SNMP agent in TCP/IP communication over a network with an SNMP network manager. The power manager is connected to control several intelligent power modules each able to independently control the power on/off status of several network appliances. Power-on and load sensors within each intelligent power module are able to report the power status of each network appliance to the SNMP network manager with MIB variables in response to GET commands. Each intelligent power module is equipped with an output that is connected to cause an interrupt signal to the network appliance being controlled. The SNMP network manager is able to test which network appliance is actually responding before any cycling of the power to the corresponding appliance is tried.

Abstract: A vertical-mount network remote power management outlet strip embodiment of the present invention comprises a long, thin outlet strip body with several independently controllable power outlet sockets distributed along its length. A power input cord is provided at one end, and this supplies AC-operating power to relays associated with each of the power outlet sockets. The relays are each addressably controlled by a microprocessor connected to an internal I2C-bus serial communications channel. The power-on status of each relay output to the power outlet sockets is sensed and communicated back on the internal I2C-bus. A device-networking communications processor with an embedded operating system translates messages, status, and controls between the internal I2C-bus and an Ethernet port, and other external networks.

Abstract: A power management device can include a power management device housing, a power input associated with the power management device housing, and a plurality of power outputs associated with the power management device housing. At least certain power outputs can be connectable to one or more electrical loads external to the power management device housing and to the power input. In some embodiments, a communications bus can be associated with the power management device housing and one or more power control sections can also be associated with the power management device housing. In some embodiments, one or more power control sections can communicate with the communications bus and with one or more corresponding power outputs among the plurality of power outputs. In some embodiments, a power information display can communicate with the communications bus.

Abstract: A network can comprise a power manager with a network agent in communication over a network with a network manager. The power manager can be connected to control several intelligent power modules each able to independently control the power on/off status of several network appliances. Power-on and load sensors within each intelligent power module can report the power status of each network appliance to the network manager with variables in response to commands. Each intelligent power module can be equipped with an output that is connected to cause an interrupt signal to the network appliance being controlled. The network manager can test which network appliance is actually responding before any cycling of the power to the corresponding appliance is tried.

Abstract: A power saving apparatus and power saving method thereof are disclosed. The apparatus includes a power controller and a power outlet, wherein the power controller has a first signal transmission interface, said first signal transmission signal interface is used to detect the operation mode of a host machine by a second signal transmission interface of said host machine, and outputs a controlling signal according to the operation mode of said host machine. The power socket communicates with the power controller and switches the power-on or off according to the control signal. When the host machine is operated in non-working mode, the power socket will turn off the power supplied to the peripheral electrical devices of the host machines, so as to save the power consumption of the peripheral electrical devices of the host machines.

Abstract: A lamp circuit is disclosed, comprising a direct current (DC) power supplier adapted to provide a supply voltage, a driving unit coupled to the DC power supplier so as to receive the supply voltage, and a light-radiating module coupled to the driving unit and having a DC output side. The driving unit generates a constant DC current that passes through the light-radiating module such that a DC voltage to be supplied to a DC load is built at the DC output side.

Abstract: A vertical-mount network remote power management outlet strip embodiment of the present invention comprises a long, thin outlet strip body with several independently controllable power outlet sockets distributed along its length. A power input cord is provided at one end, and this supplies AC-operating power to relays associated with each of the power outlet sockets. The relays are each addressably controlled by a microprocessor connected to an internal I2C-bus serial communications channel. The power-on status of each relay output to the power outlet sockets is sensed and communicated back on the internal I2C-bus. A device-networking communications processor with an embedded operating system translates messages, status, and controls between the internal I2C-bus and an Ethernet port, and other external networks.

Abstract: These inventions related to systems and methods for producing, shipping, distributing, and storing hydrogen. In one embodiment, a hydrogen production and storage system includes a plurality of wind turbines for generating electrical power; a power distribution control system for distributing, and converting the electrical power from the wind turbines, a water desalination and/or purification unit which receives and purifies seawater, and an electrolyzer unit that receive electrical power from the power distribution system and purified water from the desalination units and thereby converts the water into hydrogen and oxygen. After its production, hydrogen is stored, transported, and distributed in accordance with various embodiments.

Abstract: The propagation delay of a signal through multiple load devices coupled sequentially along a conductor is improved by separating a subset of the load devices that is more distant from the signal source, and coupling the more distant subset to the signal through a fly-over conductor that bypasses the subset that is nearer to the signal source. The technique is applicable to subsets of bit cells in a random access memory (SRAM) coupled to a given word line, or to word line decoder gates coupled sequentially to a strobe signal, as well as other circuits wherein load devices selectable as a group can be divided into subsets by proximity to the signal source. In an SRAM layout with multiple levels, different metal deposition layers carry the conductor legs between the load devices versus the fly-over conductor bypassing the nearer subset.

Abstract: Disclosed is a circuit arrangement. The circuit arrangement includes a plurality of rechargeable batteries each having at least one rechargeable electrochemical cell, and current-carrying members connecting the plurality of batteries such that when the plurality of batteries are charging the plurality of batteries are in a series electrical circuit arrangement and when the plurality of batteries are discharging the plurality of batteries are in a parallel electrical circuit arrangement.

Abstract: A method and apparatus for providing one or more operating voltages and currents to one or more auxiliary loads by tapping an LED array driven by an LED driver providing a drive voltage to the LED array, and/or supplying an operating voltage to the LED driver itself using such a tap.

Abstract: A method and system for a control power supply system is provided. The control power supply system includes a first conductor configured to carry a direct current (DC) electrical current from a source to a load, a second conductor configured to carry the DC electrical current from the load to the source, a electrical device electrically coupled in series with at least one of the first and second conductor. The electrical device is configured to fail in a shorted condition such that failure of the electrical device maintains a direct current (DC) ring bus including the first and second conductor. The control power supply system also includes a control power circuit electrically coupled in parallel with at least a portion of the electrical device such that a DC voltage across at least a portion of the electrical device provides a DC voltage supply to the control power circuit.

Abstract: A device serves to control an electrical load of at least two single loads connected in series. Each of the at least two single loads is connected in parallel to a controllable switch, so that each of the at least two single loads can be switched independently of one another. In addition, a driver stage that drives a current into the electrical load is present. The controllable switches can be controlled by the control unit. A dummy load is connected in series to the at least two single loads.

Abstract: A power saving circuit (PSC) may include a first circuit and a second circuit electrically coupled in series in a power sharing configuration. The PSC may further include a regulator that is electrically coupled to a first node between the first and second circuits. The regulator can supply current to the first node when the first circuit requires less current or the second circuit requires more current, and the regulator can remove current from the first node when the first circuit requires more current or the second circuit requires less current.

Abstract: A wireless adapter for use with a two-wire process control loop is configured to couple to a process field device in an industrial process control system. The wireless adapter is coupled to the two-wire process control loop and provides wireless communication to the process field device. The adapter includes first and second loop terminals configured to couple in series with the two-wire process control loop. Wireless communication circuitry is coupled to the first and second loop terminals and is adapted to provide wireless communication to the process field device. Loop current bypass circuitry is electrically connected between the first and second loop terminals and is configured to provide a loop current path therebetween in response to an open circuit in wireless communication circuitry.

Abstract: A semiconductor power supplying apparatus driven by a power source includes at least two driven circuits for performing prescribed data processing when electric power is supplied. An electric power supplying circuit is provided so as to convert power from the power source as needed to supply at least two driven circuits with electric power in accordance with voltages that the driven circuits need. A driven circuit power supplying condition signal generating device is provided so as to generate a driven circuit power supplying condition signal for determining a power supplying condition of all of the at least two driven circuits. A power supplying control signal generation circuit is also provided so as to generate a power supplying control signal for controlling operation of the power supplying circuit.

Abstract: A system and a process for energizing loads through a control unit, said loads being energized from a power network, said system comprising: connecting elements, each including a processing unit operatively connected to a respective power switch so as to lead the latter to opening and closing conditions, de-energizing and energizing a respective adjacent load that is electrically coupled to the connecting element; a pair of electrical conductors connected to a power network for energizing the loads and which are disposed so as to define an energizing means which is common to the connecting elements and to the control unit; and a signal conductor not galvanically isolated from the power network and which is common to the processing units and to the control unit, connecting them so as to allow the control unit to instruct, through the processing units and through coded electrical signals, the opening and closing of each respective power switch.

Abstract: A vehicular lamp is arranged to save power by not driving a cooling fan when an LED is unlit. The vehicular lamp is capable of reducing cost and stopping a supply of current to the LED even in the case of open wiring in a supply of current to the cooling fan. The vehicular lamp includes LEDs connected in series, a cooling fan connected in series with the LEDs and arranged to cool the LEDs. A current supply circuit receives power supplied from a power source and supplies current to the LEDs and the cooling fan.

Abstract: A communication apparatus has a electrical outlet that is electrically connected to a power connector so as to supply power externally; a connection detector that detects connection of an external plug to the electrical outlet; and a controller that uses a receiver and a transmitter so as to perform setting with a device connected to the electrical outlet, when external connection is detected at the electrical outlet.

Abstract: There is described a peripheral module which in addition to the connection terminals for the process data supply has connection terminals for the supply of voltage. Furthermore, the peripheral module has a changeover switching device to disconnect the peripheral module from an upstream load group. The peripheral module can assume the function of a supply group or a power module when a supply voltage is applied to the terminals. In a peripheral system made of several peripheral modules the voltage within a load group is supplied via an internal self-constructing voltage bus.

Abstract: A charging device has an electric accumulator (20) formed by a plurality of series-connected electric accumulator cells (E1, E2, . . . , En), one electrode of any one of the electric accumulator cells being used as a reference potential of the electric accumulator (20); at least one capacitor (C1) having one end fixed to the potential of one electrode of each of the electric accumulator cells (E1, E2, . . . , En) or fixed to the potential of the other electrode of any one of the electric accumulator cells (E1, E2, . . . , En) through a rectifying means (D11, D12); and a periodical power source (30) connected between the capacitor (C1) and the reference potential of the electric accumulator to generate repetitive signals.

Abstract: An AC inverter circuit supplies power to multiple lamps in an LCD backlight. Conventional AC power is used as direct input into a full wave rectifier that converts the input from AC to a DC reference voltage. A transformer driver, including a chopper, converts the DC reference voltage to a higher voltage AC which drives a step up transformer to produce a voltage sufficient to drive as many as six fluorescent lamps. The components/circuitry associated with the transformer's primary windings is optically isolated from the rest of the circuit.

Abstract: The present invention aims to provide a control system which is capable of building high-precision current detecting means in a single-chip LSI and can be realized at a lower cost, and a semiconductor device used in the control system. Drive circuits are provided inside the same semiconductor chip. The drive circuits are equipped with: current detecting shunt resistors each of which is provided in each of the drive circuits and detects a current flowing through a load, the current detecting shunt resistors being provided within a semiconductor chip by the same process; a dummy resistor provided within the semiconductor chip by the same process as the current detecting shunt resistors; and a calibration reference externally attached to the semiconductor chip and connected to the dummy resistor. A correcting means corrects the values of currents that flow through the current detecting shunt resistors, using the dummy resistor and the calibration reference.

Abstract: Disclosed is a circuit arrangement for supplying variable loads (I1, I2, M1, M2, O1, O2, O3) from three phases (L1, L2, L3), with a circuit arrangement having four groups of terminals (A11, A12, A13, A14; A21, A22, A23, A24; A31, A32; A41, A42, A43) for the loads (I1, I2, M1, M2, O1, O2, O3) which are subsequently designated as terminal groups; the circuit arrangement is suitable and set up for supplying the terminals (A21, A22, A23, A24) of the second terminal group from the first phase (L1); the circuit arrangement is suitable and set up for supplying the terminals (A41, A42, A43) of the fourth terminal group from a second phase (L2); the circuit arrangement is suitable and set up for supplying the terminals (A11, A12, A13) of the first terminal group and the third terminal group (A31, A32) from a third phase (L3); the circuit arrangement is suitable and set up for controlling the voltage of the four terminal groups, and exhibits three control loops for this purpose.

Abstract: The present invention discloses a high power LED lamp circuit with a fan provides advantages such as simple structure, high efficiency, low power consumption, energy saving, and longer lifetime. The LED lamp circuit comprises a rectifying-filtering circuit (1), an LED load (3), an output terminal (A) and a grounding terminal (G) for providing a DC power generated by passing an AC power through the rectifying-filtering circuit (1), the high power LED lamp circuit with a fan further comprises a constant current source (4), a fan driving circuit (6); the lamp circuit is formed by cascading the LED load (3), the constant current source (4) between the output terminal (A) and the grounding terminal (G), the LED lamp circuit is widely applicable in various kinds of LED lamps.

Abstract: A string set of series-connected incandescent bulbs in which substantially all of the bulb filaments in the set are individually provided with a shunt in their respective socket. If flasher bulbs are used in the string, they will twinkle off and on when the operating potential is applied. The flasher bulbs are provided with internal shunts to prevent all of the bulbs of the string from flashing on and off in the event of a failure of the shunt in the socket of the flasher bulb.

Abstract: It is normal practice in automation to network individual components of an installation via bus lines, with this network carrying out a multiplicity of communication and supply tasks during operation. In at least one embodiment, a system interface, as well as an installation which uses this interface, are disclosed with the operational reliability of the installation being improved. In at least one embodiment, a system interface is proposed for connection of a bus line to an actuator assembly in a control system with a K connection for connection of a communication channel and with a K-U connection for connection of a communication voltage supply channel, and an A-U connection for connection of an actuator voltage supply channel.

Abstract: An integrated circuit is partitioned into two or more sub-circuits, each sub-circuit including two supply terminals across which to receive supply voltage. The sub-circuits are connected in series with the first sub-circuit receiving input voltage at its first supply terminal, and the voltage level output at the second supply terminal of the first sub-circuit being used as input voltage level in a second sub-circuit. Further, a control-circuit is configured to balance voltage drops across the sub-circuits and to maintain constant voltage-drops over the sub-circuits. The control-circuit includes two buffer capacitors, each coupled in parallel over one of the two sub-circuits respectively. The control-circuit also includes at least one bucket capacitor alternately coupled in parallel over the first and the second buffer capacitor through a switching system controlled by a toggling signal.

Abstract: An electrical power distribution unit can include a power distribution unit enclosure, a power input associated with the power distribution unit enclosure, and a plurality of power outputs associated with the power distribution unit enclosure. At least certain power outputs can be connectable to one or more electrical loads external to the power distribution unit enclosure and to the power input. In some embodiments, an intelligent power section can communicate with at least one of the power outputs and can connect to a communications network external to the power distribution unit enclosure.

Abstract: A device for supplying power to a load, requiring both a pre-determined supply of electrical power and high power for short durations of the operating cycle of the load, where the operating cycle is repeated. The power supply device includes a connection to an electrical grid, an AC voltage transformation circuit, a voltage rectification means and a plurality of DC/DC converters mounted in series to terminals of the load. Each of the DC/DC converters has a storage capacitor mounted in parallel to it and at least one of the DC/DC converters is supplied directly by the voltage rectification means. At least another one of the DC/DC converters is not supplied directly by the voltage rectification means. The power supply device may compensate for losses in the power supply device and load, and may substantially continually and uniformly balance voltages at terminals of the storage capacitors.