Abstract: Methods, systems, and apparatus for electrical power distribution are described. One or more conditions of power provided from one or more fuel cells and one or more fuel cell bypass devices are monitored. At least one of the one or more fuel cell bypass devices is configured to provide power from a first alternate power source to a first electrical device if the monitored power condition of the one or more fuel cells is not satisfied and to allow power to be provided from at least one of the one or more fuel cells if the monitored power condition of the one or more fuel cells is satisfied. A static transfer switch is configured to provide power based on one or more monitored power conditions.

Abstract: A power supply circuit supplies power to a load from a main power source or an auxiliary power source. The power supply circuit includes a hybrid selection unit that selects one of the main power source and the auxiliary power source and supplies power to the load from the selected one, a voltage comparing unit that compares a voltage of the main power source and a voltage of the auxiliary power source, and a power source control unit that controls the auxiliary power source in accordance with a comparison result of the voltage comparing unit, and supplies a voltage higher than the voltage of the main power source by a predetermined voltage to the load from the auxiliary power source through the hybrid selection unit.

Abstract: A power source switching circuit for selectively connecting first and second power sources, at least one of which is a battery power source, to a load includes first and second power source connection parts for connection to the first and second power sources, a load connection part for connection to the load, first and second switch parts between each power source connection part and the load connection part, and a switching control part configured to perform a switch control of each switch part. Each switch part includes a plurality of FETs serially connected in the same direction such that a cathode side of a body diode is arranged on a load connection part side. The number of FETs is such that a sum of forward drop voltages of the body diodes exceeds the difference between a full charge voltage and a discharge voltage of the battery power source.

Abstract: Techniques are described for determining whether power from a first power source is unavailable to a power supply module. In response to determining that power from the first power source is unavailable, the techniques de-couple the first power source from one or more components of an electronic device connected to an output of the power supply module with one or more de-coupling components of the power supply module that connect an automatic transfer switch (ATS) of the power supply module to an output of the power supply module. Subsequent to de-coupling the first power source from the one or more components of the electronic device, the techniques de-couple a power supply module from the first power source. The techniques couple the power supply module to a second power source for delivering power to the one or more components of the electronic device.

Abstract: A Segment Protected Parallel Bus is for an uninterruptible power supply to electric consumers, whereby at least two electrical distributed power generation units, are connected electrically parallel, each distributed power generation unit is coupled to at least one electric consumer bus. At least two electrical protection zones for isolating electrical faults and multiple protection zones with instantaneous tripping for the electrical parallel connection of consumer networks are provided in a mutual electrical ring connection.

Abstract: A wireless charging circuit for power bank and a power bank thereof are provided in the present invention. The wireless charging circuit includes a boost DC to DC converter, a unidirectional conductive element and a wireless power converter. The input terminal of the boost DC to DC converter is coupled to the battery to receive the battery voltage. The output terminal of the boost DC to DC converter outputs a converted DC voltage. The first terminal of the unidirectional conductive element is coupled to the battery to receive the battery voltage. The input terminal of the wireless power converter is coupled to the second terminal of the unidirectional conductive element. When the wireless charging circuit performs the detection for the wireless power receiver, the wireless power converter disables the boost DC to DC converter.

Abstract: A three phase to single phase automatic transfer switch for providing power to at least one single phase power load from one of a primary and a secondary source of three phase power. The automatic transfer switch includes three pairs of switches, wherein each pair of switches is connectable to the primary and the secondary sources of three phase power, wherein each switch operates in unison with the other switch within its pair, wherein each pair of switches is connectable to a different one of the at least one single phase power load, and wherein each pair of switches is operable independently of the other pairs of switches.

Abstract: Provided are a power supply device capable of producing a highly-accurate supply voltage at low power consumption, a method for controlling the power supply device, and an electronic apparatus in which the power supply device is incorporated. The power supply device includes a first power supplying part and a second power supplying part which has less output current capacity than the first power supplying part does. The power supply device is configured to control the voltage value of the second voltage produced in the second power supplying part in order to make the first voltage produced in the first power supplying part equal to the second voltage produced in the second power supplying part.

Abstract: A battery charger is disclosed for use with various batteries, such as automotive- and marine-type batteries. In accordance with an aspect of the invention, the charging current is alternated between non-zero DC charging current levels. By alternating the charging current between non-zero DC charging levels, the battery can be charged to a higher capacity (i.e., ampere hours) faster, thus reducing the charging time and at the same time allow the rating of the battery charger to be increased. In accordance with another important aspect of the invention, the technique for alternating the charging current can be implemented in both linear- and switched-mode battery chargers.

Abstract: A power storage system includes an AC/DC converter, a first control device, a power storage device, and a load. The first control device includes a measuring portion that measures the amount of power consumed by the load, a predicting portion that predicts the demand for power consumed by the load on the basis of the amount of power consumed by the load, and a planning portion that makes a charge and discharge plan of the power storage device on the basis of the demand for power predicted by the predicting portion. The power storage device includes a second control device, a DC/DC converter, a first battery cell group, and a second battery cell group. The power storage device is placed in an underfloor space surrounded by a base and a floor of a building.

Abstract: A battery pack and charger platform including a voltage coupling circuit comprising an input that receives an input voltage and an output that sends an output voltage, a voltage monitoring circuit having an input coupled to the voltage coupling circuit output and an output, and a power source having an input coupled to the voltage monitoring circuit output, the power source input receives an input voltage representative of a charge instruction.

Abstract: An energy supply system for supplying electrical energy to a building, comprising a grid connector unit for providing a connection to an external power grid, a load connector unit for connecting to a building power grid, a conductor loop for electrically connecting the grid connector unit to the load connector unit, an energy storage device connected to the conductor loop, and a disconnector placed in the conductor loop for, upon activation of the disconnector, disconnecting the electrical connection between the grid connector unit and the load connector unit, whereby the energy storage device is connected to the conductor loop via a discharging line such that electrical energy stored in the energy storage device may be discharged through part of the conductor loop to the load connector unit when the disconnector is activated.

Abstract: A rack server system is provided. When a power source supplied to the rack server system is normal, a part of the power source is supplied to a management module in the rack server system and the other part of the power source charges the energy storage component. When the power source supplied to the rack server system is abnormal, the power source will be blocked and not be supplied to the management module, thereby preventing the rack server system from operating abnormally. In stead of the power source, the electricity stored in the energy storage component is supplied to the management module. Herein, the management module also records this situation as the state information about the rack server system whereby the rack server system can be managed according to the state information.

Abstract: A power supply switching circuit includes a switching circuit that electrically connects a VCC terminal and a VBK terminal in a connected state, a switch control circuit, and a power supply monitoring circuit that monitors a voltage of the VCC terminal, and outputs a voltage of the VBK terminal. The switch control circuit switches a mode from a normal mode in which the switching circuit is intermittently connected to a standby mode in which the switching circuit is opened according to an output signal of the power supply monitoring circuit.

Abstract: A power-gated electronic device and a method of operating the same is provided. The power-gated electronic device comprises a low drop out voltage power supply (LDO), an auxiliary power supply and at least one electronic domain having a power gate. The LDO provides a supply voltage to the at least one electronic domain which is coupled to a supply rail of the LDO via a switch, acting as a power gate. The auxiliary power supply comprises at least one current source which is coupled to the electronic domain via an auxiliary switch acting as an auxiliary power gate. The auxiliary power supply is configured to control the auxiliary switch as a function of a voltage difference between a reference voltage and the auxiliary supply voltage.

Abstract: Systems and methods are provided to control a multimode uninterruptible power supply (UPS) using external information relevant to the stability of the power source. In one example, a UPS system may include at least one inverter feed path and at least one bypass feed path. A controller may command the inverter feed path and the bypass feed path based at least in part on information relevant to the stability of the power source that supplies the first inverter feed path or the first bypass feed path, or both. This information relevant to the stability of the power source may derive from at least one information provider external to the UPS system.

Abstract: An ATS bypass switch includes a draw-out ATS switch; a bypass switch; and a processor structured to automatically control both of the draw-out ATS switch and the bypass switch.

Abstract: A power switching apparatus includes: a first input terminal to which first power is supplied; a second input terminal to which second power is supplied, the second power having a voltage that is lower than a voltage that the first power has; a first output terminal to supply to an outside the first power supplied to the first input terminal; and a second output terminal to supply to the outside the second power supplied to the second input terminal. First switching means manages the supplying of the second power from the first input terminal to the second output terminal. Second switching means manages the supplying of the second power from the second input terminal to the second output terminal. A processor manages the supplies of the first power and the second power using the first and second switching means.

Abstract: A driving apparatus for driving switching elements of a power conversion circuit. In the apparatus, a first determination unit determines whether or not a dead time that occurs immediately after a setting of discharge rate is changed is greater than the dead time assumed at the time of designing. When the dead time occurring immediately after the setting of discharge rate is changed is greater than the dead time assumed at the time of designing, a shift unit shifts in time at least one of transition to an OFF state of one of the upper-arm and lower-arm switching elements and transition to an ON state of the other of the upper-arm and lower-arm switching elements immediately after the transition to the OFF state so as to reduce a time difference between the transition to the OFF state and the transition to the ON state.

Abstract: Described herein are techniques and architectures for gradually transitioning from voltage supplied by a primary power source to voltage supplied by a secondary power source. In particular implementations, a voltage control circuit is used to transition voltage across a load to be supplied by the secondary power source. The voltage control circuit may include a first circuit and a second circuit connected in parallel. The first circuit may include the primary power source connect to the load, while the second circuit may include the secondary power source connected to one or more field-effect transistors. The one or more field-effect transistors may be controlled to cause current of the secondary power source to be gradually transferred to the load. This may result in a transfer of the voltage across the load to be supplied by the secondary power source.

Abstract: An automatic switching interface box for generators in residential dwellings and small commercial applications provides a breaker box transfer switch for generators powering one or more electrical loads. In power blackout situations, the breaker box transfer switch uses a power control relay to keep the load power on, which eliminates the need for a hot generator plug, because the plug in box is not powered. The generator power output cord is plugged onto the male plug of the interface box, or hard wired thereto. If the auxiliary generator had been started and is at rated voltage, the load is immediately and automatically switched from the utility connection to the generator as electrical source. The relay keeps the prongs of the male plug safely unpowered until the generator is attached since the relay coil is powered by the generator output and the plug is connected to the normally open contacts.

Abstract: A computer system that includes a power supply unit that generates at least one secondary supply voltage (Vcc) and an auxiliary voltage (Vaux) based on an AC supply voltage (VAC), and a system board electrically connected to the power supply unit, the system board comprising a sequencing microcontroller that selectively activates further components of the system board, the further components comprising a chipset, wherein the sequencing microcontroller is configured to monitor the state of at least one control signal of the power supply unit and/or the system board to detect a failure of the AC supply voltage (VAC) and signal the failure of the AC supply voltage (VAC) to at least the chipset.

Abstract: The present invention provides a relay-based foolproof circuit for over-voltage protection, which is electrically connected between a plug and an electric device, and includes a relay having at least one magnetic core, a coil wound around the magnetic core and two reed switches each having a reed and being normally in a closed state because of the elastic effect of its reed. The relay-based foolproof circuit is able to provide AC power of a first specification (e.g., 110 V AC power) received from the plug to the electric device. However, when AC power of a second specification (e.g., 220 V AC power) greater than the first specification flows through the coil, the coil causes the magnetic core to generate a magnetic force great enough to drive the two reed switches into an open state for stopping the AC power of the second specification from being provided to the electric device.

Abstract: The present invention is to provide an electronic device capable of automatically resetting, which includes a main circuit system and an external circuit system. The main circuit system is able to send out a power supply state signal according to the voltage thereof and an activation state signal according to whether the main circuit system is properly activated. The external circuit system is able to receive the power supply state signal and the activation state signal, switch a switch between a turned-on state and a turned-off state for automatically cutting off electricity supplied to the main circuit system through the switch while the main circuit system is improperly activated and then supplying electricity to the main circuit system thereafter. Thus, whenever the electronic device is improperly activated, the electricity supplied to the main circuit system can be automatically cut off and then restored to reset the main circuit system automatically.

Abstract: An input line selector system provided to selectively connect one of two input power lines is configured with a single switch provided in series with each of the input power lines, the connection between the switches being made such that it prevents reverse flow of current in the event that the switches are OFF. A smart, simple and precisely operating automatic line selector is provided to control the operation of the two switches. The line selector system configuration is simple and implements only two switches and can be applied to a linear charger or switching charger application with addition of one or two switches respectively, thereby providing a simple, efficient and cost effective system.

Abstract: An autonomous emergency light unit for an aircraft has a power input for receiving power from an external power supply, a rechargeable power source, at least one LED for illuminating the emergency light unit, and a light unit control logic configured to operate the emergency light unit in a plurality of operating states as a response to external control information received and processed by the light unit control logic. The plurality of operating states includes a discharge and illumination state, with the rechargeable power source being discharged over the at least one LED in the discharge and illumination state. The light unit control logic is configured to operate the emergency light unit in the discharge and illumination state as a response to no power being provided at the power input.

Abstract: A dual asymmetric input power supply architecture for use in power systems employing input power source redundancy. The dual asymmetric input power supply operates from a main input of the power supply when acceptable voltage is present on the main input. If the main input fails or is out of tolerance, power can be supplied from an auxiliary input through a transformer isolated switching converter. The dual asymmetric input power supply architecture maintains the high efficiency of a single-input power supply while providing an auxiliary connection for input power source redundancy.

Abstract: A server rack comprises a battery string connected to a controller and rectifier, server slots, a server load located in a first server slot of the server slots, a second server load stored in a second server slot of the server slots, a first AC power supply circuit supplying power to the first server load, a second AC power supply circuit supplying power to the second server load, a first DC power supply circuit supplying power to the first server load, a second DC power supply circuit supplying power to the second server load, a DC power distribution circuit connecting the rectifier to the first DC power supply circuit and the second DC power supply circuit, and an AC power distribution circuit connecting an incoming AC power supply to the first AC power supply circuit and the second AC power supply circuit.

Abstract: Systems and methods of operating uninterruptible power supplies in parallel in a power distribution system to provide power to a load are provided. At least one uninterruptible power supply inverter provides power to the load. A communication interface provides a measured value of at least one of inverter output current of a first uninterruptible power supply and a measured value of the load current to a second uninterruptible power supply, and receives a measured value of at least one of inverter output current of the second uninterruptible power supply and the load current. A controller controls the uninterruptible power supplies to operate in one of a master state and a slave state.

Abstract: A battery charger device and controller is provided. The battery charger includes a DC/DC converter operative to convert an input current and an input voltage to an output current and an output voltage. The controller is configured to determine whether the input voltage is between a minimum voltage and a maximum voltage and dynamically adjust the output current based on the determination that the input voltage is between the minimum voltage and the maximum voltage.

Abstract: A UPS system may be operated selectively in either a high efficiency mode or a low efficiency mode. An inductor is connected in series between the transfer switch and a secondary power source. The transfer switch includes thyristors arranged in a reverse connected configuration. A controller synchronizes gate commands to the thyristors in order to synchronize reserve voltage introduced by the inverter. If the load currents are not in phase with a fundamental voltage of the secondary power source, the controller waits up to a first time period in order to estimate when current through the switches will reach zero. If the out of phase current will reach zero by the end of a second time period, the inverter is switched on at the end of the second time period.

Abstract: An internal common slot battery backup unit (CSBBU) is provided that can be placed in a network device's power supply unit (PSU) slot. The CSBBU has the same features of a PSU and communicates with other PSUs in the network device in order to determine when it should supply power to the networking device and when it should be in a recharging state.

Abstract: An audio equipped fan is disclosed having a housing defining an inner cavity, a motor disposed at least partially in the inner cavity of the housing and having an output shaft extending therefrom that is rotatable by the motor, a fan connected to the output shaft of the motor and rotatable therewith, a grille connected to the housing and positioned in alignment with the fan, the grille having an interior side and an exterior side and defining first openings through which air may flow while the fan is rotated and second openings through which sound may travel, a speaker connected to at least one of the housing, motor, fan and grille and aligned on the interior side of the grille with the second openings of the grille so that sound may travel through the grille, and a temporary power source connected to the speaker. Related methods are also disclosed.

Abstract: An electric power supply control device comprises a first converter, at least one second converter, and an electrical voltage control unit. The second converter can work in intermittent oscillation, and converts outputting electrical voltage from the first converter. The electrical voltage control unit controls the outputting electrical voltage of the first converter, so that the outputting electrical voltage is equal to or less than a minimum value of upper limits of operating electrical voltage of the second converter, and is more than or equal to a maximum value of lower limits of operating electrical voltage of the second converter, and at least one of the second converter performs low electric power behavior.

Abstract: The present example provides aircraft integrated aircraft utility management and power distribution systems. Included are three exemplary implementations of aircraft power management systems (a DC power distribution system, a utility management system, and a combined system) that may utilize the like architecture, technologies, and components advantageously. A DC power distribution system can include two parts: primary DC power distribution and secondary DC power distribution systems. The utility management system integrates aircraft sub functions and utilities into one fault tolerant system. The systems described makes use of secondary power distribution units of a modularized design, including standard I/O modules, power modules, and aircraft computing modules.

Abstract: A method for generating electricity from solar power to an air handling unit or an electrical system for a tractor/trailer, relying on a photovoltaic panels (1) DC disconnects (2,3); charge controller (4); batteries (5); air handling unit or an electrical system (7); electrical wires, and fuses. The photovoltaic panel(s) will generate electrical power that will provide sufficient power to run the air handling unit or an electrical system.

Abstract: A semiconductor memory device includes a memory cell array, a voltage generator suitable for generating voltages used for controlling the memory cell array in response to a power-saving signal, and a control logic suitable for providing a power-saving signal to the voltage generator, based on a chip select signal. The control logic includes a delay block suitable for delaying the chip select signal and generating the power-saving signal based on the delayed chip select signal.

Abstract: A system and method of power distribution and backup is provided. The power backup system includes a first uninterruptible power supply and a second uninterruptible power supply configured to drive a load in parallel. The first uninterruptible power supply and the second uninterruptible power supply are both connected through a direct connection or through at least two switches to at least two power sources.

Abstract: There is provided a power converter that is operated by using a power supply of one system and effectively using a current flowing in a load. A charging operation that supplies a charging current and the like to a load 13 and a discharging operation that outputs a discharging current from the load 13 are performed by switching each semiconductor switch of a full-bridge circuit 12. A control section 15 controls all semiconductor switches of the full-bridge circuit 12 to be in an OFF state while switching the charging operation and the discharging operation, makes an inertia current generated by energy accumulated in inductors 27 and 28 flow from a circulation diode of the semiconductor switch that is in OFF-state to a first connection point of the full-bridge circuit 12, and supplies the inertia current to a control power supply section 14 or a DC fan 16 by the reverse flow prevention diode 18.

Abstract: A power consumption control apparatus and a power consumption control method capable of providing a power storage being utilized as an uninterruptible power supply (UPS), and in a case of an emergency, automatically selecting a load to supply a backup power to the load, the power consumption control method including determining an occurrence of an abnormality in a supply of a grid power and a renewable power, performing an emergency mode to immediately finish a current operation of a load if it is determined that an abnormality in the supply of both of the grid power and the renewable power has occurred, and performing a standby mode to stand by until the current operation of the load is finished in a normal manner if it is determined that an abnormality in the supply of the grid power has occurred while the supply of the renewable power is normal.

Abstract: An apparatus, system, and method are disclosed for power reduction management. The method includes determining that a power source has failed to supply electric power above a predefined threshold. The method includes terminating one or more non-essential in-process operations on a nonvolatile memory device during a power hold-up time. The method includes executing one or more essential in-process operations on the nonvolatile memory device within the power hold-up time.

Abstract: A power system including an uninterruptible power system (UPS) and a maintenance bypass panel (MBP) The UPS has an input to receive input power and an output to provide output power. The MBP has an input to receive the output power provided by the UPS and an output to provide the input power to the input of the UPS. A busbar is configured to couple one of the input of the UPS to the output of the MBP and the output of the UPS to the input of the MBP. The busbar has a first region to couple to one of the input and the output of the UPS, a second region to couple to one of the input and the output of the MBP, and a measurement region. A cover shields the busbar from inadvertent contact and includes a small diameter aperture to permit access to the measurement region of the busbar.

Abstract: A modular emergency power system architecture (200) with a plurality of output power supply lines for feeding power to a destination, in which the operational status of each output power supply line is configurable. The architecture comprises a plurality of load bars (208, 209) from which power is delivered to the destination. The load bars (208, 209) are selectively connectable to send power to or receive AC power from a mains supply (202) and/or a DC bus (210) via one or more AC/DC power conversion modules (212, 214). The DC bus (210) is connected to receive a secondary (e.g. emergency) power supply (218, 224). The architecture may provide redundancy and on-the-fly reconfigurability to complement changes in the physical location of critical components in the destination, e.g. caused by virtualization, zoning or repair. The architecture is operable as a stand-alone uninterruptible power supply (UPS) or as an extended runtime generator for an existing UPS.

Abstract: A power system includes a power generating plant including a plurality of power generators, and an AC collection grid adapted to interconnect the power generating plant and an HVDC converter station. The AC collection grid is adapted to operate outside network regulations, whereby advantages such as simplified control and electronics are achieved. A method of operating a power system is also provided.

Abstract: Improved electrical power conversion system configured to transfer power between a DC voltage differential occurring between input DC terminals and lower DC voltage differential made up of the output differential voltages between a positive output DC terminal and a system neutral terminal and a negative output DC terminal and the system neutral terminal. The system actively controls the output differential voltages to account for variations in the electrical loading placed on the system. The system also actively controls the neutral voltage differential between the neutral terminal and Earth Ground. The output differential voltages are controlled to be maintained within an acceptable range for the types of electrical loads powered by the system (e.g. computers, servers, LED lighting) and to the extent the differentials vary, the system corrects the variances at frequencies which do not adversely affect system circuit protection or the electrical loading on the system.

Abstract: For levelling the partial powers which flow at a grid connection point between a multi-phase AC power grid having a plurality of phase conductors and a unit for feeding electric energy into the AC power grid having a multi-phase inverter as well as electric consumer loads connected to the AC power grid, via the individual phase conductors, differences between the partial powers flowing via the individual phase conductors are determined and are reduced by feeding different partial powers with the inverter into the individual phase conductors.

Abstract: A multi-phase switching converter includes a plurality of switching circuits and a controller. The output terminals of the plurality of switching circuits are coupled together to provide an output voltage to a load. The controller is configured to generate a plurality of control signals to control the plurality of switching circuits. When an over current condition of a current switching circuit of the plurality of switching circuits is detected, the controller skips the current switching circuit and successively turns on the remaining plurality of switching circuits that have not yet been turned on and where an over current condition has not been detected.

Abstract: A machine tool having a drive motor includes an electronic unit and a switch for switching the drive motor on/off. An additional contact module is connected to the electronic unit, the drive motor being electrically connected only to the contact module. Also, the switch is connected to the contact module.

Abstract: A vehicular charger is provided with a main casing body and a secondary casing body; a chargeable source part inside the main casing body; a circuit board electrically connected to the chargeable source part; an interface on the circuit board; an illumination assembly inside the secondary casing body and charged by the chargeable source part; a switch for controlling the ON/OFF of the illumination assembly on the circuit board; a magnet is mounted on the secondary casing body. The vehicular charger is useful, for example, in the home, office, and during travel, in which a buckle can be used to carry the charger, an LED light can be used to illuminate, and the interface can be used for charging or interfacing the charger with other electronic devices.

Abstract: A power supply control system and a semiconductor integrated circuit that may prevent reverse current flow from a solar battery to a primary battery includes first and second switching circuits. In the first switching circuit, a first voltage that is the primary battery output voltage dropped by a first voltage level and a second voltage that is the load side voltage dropped by a second voltage level are compared by a comparator. Electrical connection between the primary battery and the load is disconnected when the second voltage is equal to or greater than the first voltage. In the second switching circuit for a solar battery and the load, the switching circuit is similarly switched OFF before the load side voltage exceeds the output voltage of the primary battery or the solar battery, preventing damage to the battery due to reverse flow of current.