Abstract: A hybrid power plant is characterized by a substantially constant load on generators regardless of momentary swings in power load. Short changes in power load are accommodated by DC components such as capacitors, batteries, resistors, or a combination thereof. Resistors are used to consume power when loads in the power plant are generating excess power. Capacitors are used to store and deliver power when the loads in the power plant demand additional power. Reducing rapid changes in power load as seen by the generators allows the generators to operate at higher efficiencies and with reduced emissions. Additionally, power plants employing combinations of generators, loads, and energy storage devices have increased dynamic performance.

Abstract: To minimize excessively high output or increases in magnetic-flux leakage by controlling power feeding on the power-feeding side if an unforeseen situation occurs. This power-feeding device (100) feeds power to an external power-receiving device (150) in a contactless manner. A power-feeding coil (103) uses electromagnetic power to feed electrical power to a power-receiving coil (154) in the power-receiving device (150). While power is being fed from said power-feeding coil (103), a power-feeding-side control unit (107) determines the amount of displacement of the power-feeding coil (103) and, on the basis of the determined displacement amount, controls the amount of electrical power being fed.

Abstract: The present invention provides a wireless power transmitter comprising at least two loops, and separate drivers, each driving a respective one of the loops and providing a respective alternating current to the respective loop, thereby to transmit wireless power for receipt by at least one wireless power receiver. Also provided is a wireless power receiver comprising a receiver loop, and at least two focusing loops. An associated system and an associated method are also provided.

Abstract: A method of receiving a plug at a receptacle is disclosed. The method may include receiving a plug at a receptacle, the receptacle including contacts disposed with a rotational symmetry about a center point of the receptacle. The method may also include determining, via detection circuitry, any orientation of the plug inserted into the receptacle. The method may also include changing, via selection control circuitry, a connection path coupled to the contacts based on the orientation of the plug.

Abstract: A data center power distribution system is disclosed. Utility power normally supports the devices (load) in the data center, but when utility power fails, backup energy from a generator and/or flywheel smooths out the supply. Each utility main/backup combination feeds one or more breakers, and each breaker supplies power to two or more servers, where each server receives redundant power input from to such breaker paths. In some embodiments, synchronization buses are absent between the breaker and the server. Redundant and well valved plumbing leads chilled supply water from chiller plants to air handlers (in some embodiments, through an isolation manifold) and back while enabling isolation of leaks and equipment failures. A special air handler design contains water and efficiently moves cooled air into the operational space of the data center.

Abstract: A photovoltaic (PV) module can include a plurality of solar cells and circuitry configured to switch between a first state in which output voltage from the PV module includes voltage from the plurality of solar cells and a second state in which the output voltage includes voltage from fewer that all the plurality of solar cells.

Abstract: The present disclosure is directed to a padmount transformer. The padmount transformer includes an electrical distribution transformer housed in a cabinet that can be mounted on a ground level platform or pad. High/medium voltage connectors of the electrical distribution transformer can connect to high/medium voltage terminals of a power supply network. Low voltage connectors of the electrical distribution transformer are configured to connect to low voltage terminals of one or more loads coupled to respective renewable energy sources. The high/medium voltage connectors and the low voltage connectors are housed in the cabinet. An energy storage apparatus is housed in the cabinet and is connected with the low voltage connectors for supplying power to the loads. Power can be supplied to the energy storage apparatus by the renewable energy sources. An inverter is operable for commanding the power supply direction at the energy storage apparatus and a control unit is configured to control the inverter.

Abstract: A nonlinear resonator is presented that enhances the bandwidth while providing high resonance amplitude. The nonlinear resonance circuit is comprised of an inductor electrically coupled to a capacitor, where either the inductor or capacitor is nonlinear. Response of the nonlinear resonance circuit to an excitation signal is described by a family of second-order differential equations with cubic-order nonlinearity, known as Duffing equations.

Abstract: A method and system are disclosed for managing power demand of a plurality of charging stations sharing the same portion of an electrical network, the method comprising obtaining an indication of a maximum value of power allowed at the portion of the electrical network; obtaining an indication of a current power consumed at the portion of the electrical network; managing a charging configuration of the plurality of charging stations to ensure that the current power consumed at the portion of the electrical network stays lower than the maximum value of power demand allowed.

Abstract: A method and system of operating an on-board charger (OBC) for an eco-friendly vehicle are provided to improve durability and extend a lifespan of the OBC during the charging of a vehicle battery using a commercial power source. The system improves durability and extends a lifespan of the OBC including a power factor correction (PFC) part by alternately operating a first boost converter and a second boost converter of the PFC part during the charging of a battery by using a commercial power supplier (an in-cable control box (ICCB)).

Abstract: An efficient power transmitting terminal, a contactless power transmission device and a power transmission method are disclosed herein. By adjusting the equivalent output impedance of the DC-AC voltage converter through a soft-switching control circuit composed of an inductor or an inductor and a capacitor, the equivalent output impedance is maintained at inductive impedance. According to the feature of current of inductive impedance lagging behind the voltage, the voltage of the switching device in the DC-AC voltage converter reduces to zero before switching-on, to achieve zero-voltage switching-on.

Abstract: An onboard electric system includes a drive circuit that drives an electric motor based on an output voltage of a direct current power supply; a first smoothing capacitor; a drive signal generator; a first discharge resistor that is connected between a positive electrode and a negative electrode of the first smoothing capacitor; a first discharge switcher that is connected in series to the first discharge resistor between the positive electrode and the negative electrode, and releases or makes a connection between the positive electrode and the negative electrode; and an off-signal generator that outputs an off signal to the first discharge switcher. The first discharge switcher is provided by a switcher of a normally-ON type that makes the connection between the positive electrode and the negative electrode through the first discharge resistor in a period other than a period while the off-signal generator provides the off signal.

Abstract: The invention relates to an energy supply system (2) having a first energy supply network (4) including a power network (36) for transporting electrical energy (46), and a second energy supply network (6) having a transport system (60) for fluid operating materials (56), said energy supply system comprising at least one energy-generating unit (8), and through electrical energy and carbon-containing material (50, 54, 58) the fluid operating materials are produced and fed into the second energy supply network, and further comprising at least one local energy management unit (10), by means of which fluid operating materials extracted from the second energy supply network can be converted into electrical energy (74, 76, 78) and can be fed into a local power network (90).

Abstract: A relay apparatus in a wireless power transmission system includes a relay power reception antenna that receives power transmission alternating current power from a power transmission power transmission antenna, a relay rectifier that converts the power transmission alternating current power into relay direct current power, a relay inverter circuit that converts the relay direct current power into relay alternating current power, and a relay power transmission antenna that wirelessly transmits the relay alternating current power. When the relay apparatus has received binary relay received data, the relay apparatus reverses a sign of the binary relay received data and eliminates a difference between a first voltage of the relay direct current power and a second voltage of the relay direct current power on the basis of the reversed binary relay received data.

Abstract: One aspect of the present invention relates to a computer program for causing a computer to operate as an energy management system for managing the operation state of electric power devices including a storage battery connected to a power grid. The program includes: a first step of acquiring static parameters used in controlling the electric power devices; and a second step of controlling the electric power devices based on the acquired static parameters. The static parameters acquired in the first step include at least five types of parameters, namely, a storage battery capacity, dischargeable power, chargeable power, discharge efficiency, and charge efficiency.

Abstract: A system for controlling an automatic engine stop-start system of a vehicle includes a controller, an engine configured to be automatically stopped and started in response to a signal from the controller, a primary power source electrically coupled to the controller, and an auxiliary power source electrically coupled to the controller. A power control relay is electrically connected between the primary power source and the auxiliary power source and is configured to be selectively activated to isolate the auxiliary power source from the primary power source such that only the auxiliary power source is configured to supply power to the controller. The controller is configured to determine if the auxiliary power source is electrically disconnected from the vehicle when the power control relay is activated.

Abstract: The invention concerns an electrical system that comprises: —an electrical charge (42, 43); —a decoupling capacitor (41); —a DC voltage power supply system, comprising first and second terminals (321, 322), including: —a DC voltage source (2) comprising first and second poles; —a first branch including a first contactor (51); —a second branch including first and second switches (302, 303) and an inductor (305) connected in series in order to selectively connect the DC voltage source to the first terminal (321) of the power supply system; —a unidirectional conducting device (307, 308, 309) for conduction from the second terminal of the DC power supply system to a connection node (323) between the second switch (303) and said inductor (305); —a control circuit (304) comprising —a mode for supplying electrical load (42, 43); —a mode for charging the decoupling capacitor (41).

Abstract: A modular uninterruptible power supply (UPS) provides modular uninterruptible power support to multiple rack computer systems. The modular UPS can include one or more rectifier, battery, and inverter modules installed in one or more rack frames. The modules can be installed in a common rack frame and electrically coupled via a bus bar coupled to the frame. The modules can be installed in separate rack frames and electrically coupled via a bus bar extending between the separate rack frames. The modular UPS can include multiple sets of rectifier modules and battery modules which are electrically coupled to the rack computer systems in parallel and can provide uninterruptible power support subsequent to at least one module failure. The rectifier, battery, and inverter modules installed in the rack frames can be adjusted to provide scalable power support based at least in part upon the power support requirements of the rack computer systems.

Abstract: A wireless temperature maintenance container has an accommodating space accommodating a transmitter circuit and a receiver circuit. The transmitter circuit comprises a first power processing circuit and a transmitter coil. The first power processing circuit receives a utility power and outputs a first direct current. The transmitter coil receives the first direct current and generates a magnetic field. The receiver circuit comprises a receiver coil, a second power processing circuit and a temperature controller. The magnetic field passes the receiver coil and an alternating current is generated. The second power processing circuit receives the alternating current and outputs a second direct current. The temperature controller receives the second direct current to control the temperature of the container. The transmitter circuit is on the first circuit board, and the receiver circuit is on the second circuit board. Distance between the first circuit board and the second board is 2 mm˜4 mm.

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.