Abstract: A downsized electric junction box and a power supply device having the same are provided. The electric junction box includes: a box main body including a connector engagement portion to be engaged with a connector and relay mount portions for mounting relays; and a wiring unit received in the box main body including mount portions mounted on a bottom wall of a lower case of the box main body and a plurality of terminal portions positioned inside the connector engagement portion and extending from the mount portions. A terminal positioning portion of the lower case includes a planar wall positioning the terminal portions on a surface thereof, extending walls extending from between the adjacent terminal portions, and parallely-projecting walls each projecting from an end of the extending wall in parallel with the planar wall. The mount portion includes a cutout portion through which the parallely-projecting wall is passed.

Abstract: A method of operating a superconducting switch system to protect against quenching in a superconducting magnet circuit is provided. The system comprises a magnet circuit, a main superconducting switch and an auxiliary superconducting switch connected in parallel thereto by low resistance connecting parts. In an initial magnet energisation procedure, after establishing superconducting flow in the circuit, the main and auxiliary switches are closed to cause current to persist in the circuit without further power input. If the main switch quenches, the current will transfer to the auxiliary switch through the resistive connecting parts. Upon restoring the main switch to the superconducting state, the voltage drop through the resistive connecting parts will drive the current back through the main switch. A preconditioning procedure is carried out as part of the magnet energisation procedure to ensure that opening the main switch will establish superconducting current through the auxiliary switch.

Abstract: An outdoor extension line socket enabling remote controlled timing power supply is disclosed, comprising a socket body and a remote controller body, in which the bottom of the socket body is formed as a tapered body for sticking the socket body into the ground. The socket body consists of a socket, a display, a time adjustment button, an extension line plug and a socket power control circuit. In addition, the remote controller body consists of a time adjustment wheel, two switch control buttons and a remote control circuit. As the socket body being stuck on the outdoor ground, it is possible to provide electric power required for operations of an outdoor electronic device, and the power supply time of the socket body can be adjusted in accordance with the settings done by the remote controller body so as to designate the operation time of the outdoor electronic device.

Abstract: A power switching device, a power switching method, and a projection device using the power switching device are provided. In the power switching method, a first power and a second power are received, and the voltage level of the first power is compared with the voltage level of the second power. One of the first power and the second power having the higher voltage level is sustained by using one of the first power and the second power having the lower voltage level until one of the first power and the second power having the higher voltage level stabilizes. At least one of the first power and the second power having the higher voltage level and being already stabilized is output as an output voltage.

Abstract: The operation and/or power of a plurality of energy loads and/or energy supplies configured to supply power to the energy loads are managed in a coordinated manner. The coordinated control over the energy loads and/or energy supplies may enable the execution of missions including a one or more objectives by energy loads with an enhanced efficiency, autonomy, and/or effectiveness. Aspects of the planning and/or management of execution of the missions may be automated according to predetermined rules and/or criteria.

Abstract: A solar photovoltaic plant is disclosed where a number of distributed DC-to-DC converters are used in conjunction with a central DC-to-AC converter. Each DC-to-DC converter is dedicated to a portion of the photovoltaic array and tracks the maximum power point voltage thereof. The DC-to-DC converters also boost the photovoltaic voltage and regulate a DC output current for transmission to the central DC-to-AC converter. Five distinct advantages are had over the prior art. First, efficiencies in intra-field power collection are greatly improved by transferring power at higher DC voltages. Second, the number of independent photovoltaic maximum power point trackers in the power plant can be increased, in a cost effective manner, to optimize the overall photovoltaic array energy harvest. Third, each DC-to-DC converter output “looks” like a current source at the input of the DC-to-AC converter and therefore can be easily paralleled.

Abstract: An electrical storage element control system for a vehicle. The control system includes electrical storage elements electrically coupled to each other in parallel, switch devices, and a controller. Each of the electrical storage elements defines a total storage capacity and having a state of charge cooperatively defining a total stored charge, and is adapted to be in electrical communication with an electrical load and a power source. The switch devices are electrically coupled to the electrical storage elements such that each switch device is associated with a corresponding electrical storage element and is operable between connected and disconnected states.

Abstract: A system, apparatus and method for increasing the reliability of an electric power transmission or distribution system by injecting controlled electric power into the transmission or distribution system using mobile electric power sources. The mobile electric power source may be a locomotive engine. The mobile electric power source may be controlled using an IED. The mobile electric power source may be controlled to provide active power or reactive power or act as a governor or exciter to the electric power transmission or distribution system.

Abstract: A passive power generation system comprised of a magnification device for magnifying energy and a recovery device operatively coupled to the magnification device for recovering at least a portion of the magnified energy and a method for making the passive power generation system for magnifying and recovering energy.

Abstract: A system for combining electrical power from two or more power sources includes first and second conversion stages (120) which receive input power from two or more power sources (110), and produce different output voltages, including DC outputs. The input power sources (110) may have different voltage, frequency, and phase characteristics, and may be DC voltages. Various embodiments are disclosed for converting and combining the input power sources (110) to provide at least a DC output voltage and an optional AC output voltage which may have different voltage, frequency, and phase characteristics than the input power sources (110). In another embodiment, a method of power conversion is disclosed.

Abstract: Various embodiments of a wirelessly powered local computing environment are described. The wireless powered local computing environment includes at least a near field magnetic resonance (NFMR) power supply arranged to wirelessly provide power to any of a number of suitably configured devices. In the described embodiments, the devices arranged to receive power wirelessly from the NFMR power supply must be located in a region known as the near field that extends no further than a distance D of a few times a characteristic size of the NFMR power supply transmission device. Typically, the distance D can be on the order of 1 meter or so.

Abstract: [Problem] When load power is assisted, the number of component parts becomes greater because an AC power detector is provided in the AC power supply of an inverter. [Means for Solution] An instantaneous output power calculating section comprises a power calculating section to calculate power by using detected values of voltage and current on the output side of an inverter, and a correction calculating section to correct the calculated power. Moreover, limiter sections are provided, respectively, in charge control section and discharge control section for a chopper, and limiter values of the limiter sections are varied by the power calculated by the instantaneous output power calculating section.

Abstract: A method for powering one or more loads from a varying input voltage comprises controlling a primary switch to selectively apply the input voltage to energize an inductor, controlling a load switch to selectively connect the inductor to the load, monitoring one or more load parameters to determine load conditions, and, when the load conditions meet a load requirement, disconnecting the load from the inductor and directing any remaining current in the inductor to a energy storage element.

Abstract: An electric power supply device generates electric power having a prescribed frequency. An electric power transfer unit receives electric power from the electric power supply device, and transfers electric power to an electric power receiving unit in a contactless manner by resonating with the electric power receiving unit via an electromagnetic field. An electric power sensor senses power reflected to the electric power supply device. A discharging coil unit externally discharges electric power output from the electric power supply device. A relay electrically connects the discharging coil unit between the electric power supply device and the electric power transfer unit when the reflected power detected has a value exceeding a predetermined value.

Abstract: A portable power source is configured for use with an electronic device. The portable power source cooperates and communicates with the electronic device via a peripheral bus to which the electronic device is attachable. The portable power source includes circuitry to process a power request signal from the electronic device to determine whether a device connected to a bus interface of the portable power source is requesting power from the portable power source.

Abstract: A power transmission apparatus includes: a power source; a power transmission coil that transmits electric power supplied from the power source outward as magnetic energy through magnetic resonance; a peak searching unit that searches for a drive frequency at which the magnetic energy transmitted outward has a peak; a peak split detector that detects splitting of the drive frequency at which the magnetic energy transmitted outward has a peak; a selection unit that selects a higher-frequency side frequency among split drive frequencies generated by the splitting; and a drive unit that drives the power transmission coil using the frequency selected by the selection unit.

Abstract: An arrangement to control an electrical property of a medium or high voltage AC system including a number n of phases with n being at least two includes a number n of phases, each phase including a series connection of at least two electrical elements with an intermediate connection point between each pair of the at least two electrical elements, where each of the n phases of the arrangement is connected on one side to an original common neutral point and on the other side to one of the n phases of the AC system. The arrangement further includes a number of first switchable interconnections, where the first switchable interconnections are each arranged between two intermediate connection points of two of the n phases of the arrangement, and at least one control unit arranged to control the first switchable interconnections.

Abstract: A method for powering one or more loads from a varying input voltage comprises controlling a primary switch to selectively apply the input voltage to energize an inductor, controlling a load switch to selectively connect the inductor to the load, monitoring one or more load parameters to determine load conditions, and, when the load conditions meet a load requirement, disconnecting the load from the inductor and directing any remaining current in the inductor to a energy storage element.

Abstract: A mild hybrid system according embodiments of the invention may include: a motor-alternator; an inverter for controlling electrical energy flow to and from the motor-alternator; an electrical energy storage for storing electrical energy generated by the motor-alternator; and a unidirectional DC/DC buck converter including a bypass means for providing a physical connection between the motor-alternator and a vehicle electrical load. With the system, the manufacturing cost can be reduced, packaging process can be simplified, and an additional cooling device is not required.

Abstract: There is disclosed a system for transferring energy wirelessly by an evanescent electromagnetic field. The system includes a housing including electrically conducting walls defining a space and an injector configured to inject electromagnetic waves into the space. A wall of the housing is configured to be placed adjacent to an electromagnetic energy reception device and includes one or more apertures. The frequency of the electromagnetic waves is lower than the cutoff frequency of the housing, and the one or more apertures have a size smaller than the waves wavelength so that an evanescent electromagnetic field is emitted from the one or more apertures of the wall and may reach the energy reception device.