Abstract: A management method comprises: a step A of transmitting, from a management device to a distributed power supply which operates in a first state in which a reverse power flow from a facility to a power grid is not permitted, a permission message permitting to operate in a second state in which the reverse power flow is permitted; a step B of switching by the distributed power supply, the operation of the first state to the operation of the second state after receiving the permission message; and a step C of switching by the distributed power supply, the operation of the second state to the operation of the first state, even when switching from the operation of the second state to the operation of the first state is not instructed, if a predetermined condition is satisfied.

Abstract: The subject of the invention is a medical device positioning system intended to increase resistance to accidental activation. This is accomplished using two independent systems to configure the actuator in the given position.

Abstract: A power supply system includes a power supplier circuit and a power receiver circuit. The power supplier circuit supplies a power via a communication interface compatible with a first communication interface specification or a second communication interface specification. The first communication interface specification includes a delay threshold. After the power supplier circuit is coupled to the power receiver circuit, the power supplier circuit supplies the power after a first delay period. The power receiver circuit confirms whether the power supplier circuit is coupled to the power receiver circuit via a coupling confirmation step according to the first communication interface specification. The power receiver circuit confirms whether the power supplier circuit is compatible with the first communication interface specification or the second communication interface specification according to whether the first delay period is greater than the delay threshold.

Abstract: A mobile terminal includes a communication controller configured to detect a wireless tag in a mobile environment and a wireless charging controller configured to receive power wirelessly, and control the communication controller to determine whether the wireless tag is in the mobile environment, in response to receiving a wake-up power signal from a wireless power transfer apparatus.

Abstract: A power cord is described that includes “in-line” power control functionality. The power control functionality may selectively enable or disable a flow of electrical current through the power cord and/or selectively control an amount of electrical current that is permitted to flow through the power cord. The power control functionality may be activated and/or controlled through the receipt of control signals from an external device. The power cord may be configured to monitor the state of an electronic device to which it is connected and selectively activate and/or modify the operation of the power control functionality in response to the detection of a particular state of the electronic device. The power cord may also be configured to receive and analyze sensor data, and based at least on the analysis, selectively activate and/or modify the operation of the power control functionality.

Abstract: A vehicle power supply circuit includes; a plurality of switch circuits which are connected in parallel to each other and connected to a power supply at positive electrode side to be switched to an open or short circuit separately; a relay circuit including an excitation coil and a switch unit which is connected to the power supply at positive electrode side and is switched from an open circuit to a short circuit since a current flows from the power supply to the excitation coil; and a resistor disposed in parallel with the excitation coil and connected in series to the plurality of switch circuits.

Abstract: Apparatuses, systems and methods for configuring and managing the combination of strings of photovoltaic energy generators to improve the energy production performance of such generators. The strings of photovoltaic energy generators are connected to terminals in a combiner box having receptacles for receiving removable modular units of various types. Removable modular units with measurement capabilities are used in the combiner boxes to measure the direct current input provided by the strings; and in light of the measurements, the removable modular units can be selectively downgraded to simpler units that do not have measurement capabilities to reduce cost, and/or selectively upgraded to more sophisticated units that can adjust the output of the respective strings, such as upconverting the output voltage of the respective strings, to improve the performance of the strings.

Abstract: Disclosed is a method of wireless power transfer to at least one wireless station connected to a network from an energy signal transfer apparatus operating in the same frequency band as a wireless local area network (WLAN). The method includes: receiving an energy transfer request from a first wireless station connected to the network; calculating the direction of energy signal transfer in response to the energy transfer request; and sending an energy signal to the first wireless station in the calculated direction of energy signal transfer for the duration of energy transfer. The energy signal transfer apparatus allows for power transfer without causing interference with data transmission on a channel where data transmission occurs, by transferring energy only in the direction of stations requesting energy transfer by beamforming technology.

Abstract: An on-board network for a motor vehicle, having at least one energy storage system for the intermediate storage of electrical energy and an electrical power network, which has at least one energy-consuming device that can be operated with electrical energy from the energy storage system and at least one charging device for charging the energy storage system, wherein the energy storage system is electrically connected to the electrical power network by way of at least one contactor. In this case, it is provided that the energy-consuming device is present in a first electrical power sub-network of the electrical power network and the charging device is present in a second electrical power sub-network of the electrical power network.

Abstract: A power source device includes a switching circuit configured to switch the power supply mode between a first power supply mode, in which power is supplied to a drive circuit for an electric motor by only a main power source, and a second power supply mode, in which power is supplied to the drive circuit utilizing both the main power source and an auxiliary power source. A control device includes: a determination unit that determines whether the operation state of the electric motor is a regeneration state or a power-running state; and a unit configured to limit power to be supplied to the drive circuit when the power supply mode is the second power supply mode and it is determined by the determination unit that the operation state of the electric motor is the regeneration state.

Abstract: According to one embodiment, a power transmission device including a housing for landing a vehicle, and a ferromagnetic material and a power transmission coil. An outer shape of a cross-section of the housing becomes larger from a top of the housing toward a bottom of the housing, the outer shape is a non-true circle, and the outer shape is similar to an inner shape of a frame provided in the vehicle. The ferromagnetic material is within the housing, the ferromagnetic material being continuous in an up-and-down direction of the housing. The power transmission coil is within the housing, the power transmission coil being configured to surround the ferromagnetic material.

Abstract: In an example, a battery control system is disclosed. The battery control system can include a plurality of batteries, a first terminal, a second terminal, and a third terminal. The battery control system also includes a plurality of switches configured to connect a first battery of the plurality of batteries to and from the first terminal and the third terminal and to connect a second battery of the plurality of batteries to and from the second terminal and the third terminal. The battery control system also discloses a switch resistance modulation module configured to modulate a resistance of at least one switch of the plurality of switches between zero ohms and infinity ohms based on a battery parameter and a control signal.

Abstract: A wireless power supply coil unit for transmitting or receiving power wirelessly includes a coil having a hollow portion and a coil axis in a vertical direction, a first magnetic body having an opening at a position corresponding to the hollow portion of the coil, a second magnetic body having a plate-like shape and arranged in the hollow portion of the coil on one side of the first magnetic body, and an insulating plate interposed between the first magnetic body and the second magnetic body. The coil unit has high surface stiffness of the magnetic bodies and prevents or reduces dielectric breakdown between contact surfaces of the magnetic bodies.

Abstract: A method for feeding electrical power, by a one wind power installation, a power plant or a generation plant, into an electrical supply grid is provided. The grid has a grid voltage having a grid frequency at a grid connection point. In the method a reference system having a reference frequency, a reference phasor having a reference angle, and a reference amplitude of an output voltage are specified. The reference angle revolves at the reference frequency and the reference frequency substantially corresponds to the grid frequency. A phase angle between the output voltage and the grid voltage is specified and an infeed angle is determined. The output voltage is generated having a voltage amplitude depending on the reference amplitude, a frequency depending on the reference frequency and the infeed angle. Tracking of the behavior of the grid voltage is delayed by the reference system.

Abstract: A voltage adjustment device comprises a voltage detector and a signal emitter. The voltage detector electrically connects to an electrical device through a power rail and obtains a voltage detected value of the power rail. The signal emitter electrically connects to the voltage detector and is configured to electrically connect to a host and a power board. The signal emitter generates a power good signal and sends the power good signal to the host when the voltage detected value is larger than a baseline voltage value for the first time. After sending the power good signal, the signal emitter generates a voltage adjustment signal according to the voltage detected value and is configured to send the voltage adjustment signal to the power board for selectively adjusting a voltage provided by the power board.

Abstract: A method for regulating output characteristics of a photovoltaic module and a DC/DC converter are provided. The DC/DC converter connected with the photovoltaic module determines whether an output voltage of the DC/DC converter detected in a real-time manner is greater than a first preset voltage threshold, and controls an output current of the DC/DC converter to be greater than a first preset current threshold and less than zero or control an output power of the DC/DC converter to be greater than a first preset power threshold and less than zero, in a case that the output voltage is greater than a first preset voltage threshold.

Abstract: A discrete capacitance switching circuit includes a DC decoupling capacitor connected between a power node that receives an AC signal and a first node, a diode connected between the first node and a second node, a unit capacitor connected between the second node and a reference node that receives a ground voltage, and a bias circuit. The bias circuit is configured to apply a first DC voltage to the first node and apply a second DC voltage to the second node. The applied first and second DC voltages control a switching operation of the diode.

Abstract: A contactless power feeding apparatus includes a fixed electrode device and a movable electrode device that is movable with respect to the fixed electrode device, and the fixed electrode device and the movable electrode device can exchange electric power through electric field coupling. The fixed electrode device includes at least one fixed electrode plate extending in a longitudinal direction. The movable electrode device is movable along the fixed electrode plate in the longitudinal direction, and includes at least one movable electrode unit that is movable in the thickness direction of the fixed electrode plate. The movable electrode unit includes a pair of movable electrode plates opposed to both respective side faces of the fixed electrode plate, and a spacer member that holds the distance between the pair of movable electrode plates constant and brings the pair of movable electrode plates into conduction.

Abstract: A method controls an UPS with a system having: first and second terminals, a switch having: first and second switch terminals respectively connected to the first and second terminals; first and second thyristors connected between the first and second switch terminals in anti-parallel; and an inverter connected to the second terminal and the energy store. Switch current and a first potential at the first terminal are detected. In a first fault, where the first potential drops past a first rule and the switch current rises above a second rule: a second potential at the second switch terminal is set using the inverter so the switch current becomes zero. Then the switch current is compared with a second threshold, and if it is exceeded, a first check result is positive, otherwise it's negative. When positive, the second potential is reversed.

Abstract: A working machine comprises a direct voltage source (301), a first power converter (302) for transferring energy from the direct voltage source to electric machines (303a, 303b) driving actuators of the working machine, an electric connector system (304) for electrically connecting to an external power grid, a second power converter (305) for transferring energy from the external power grid to the direct voltage source, and alternating current electric machines (306a, 306b) driving auxiliary devices of the working machine. The electric connector system is suitable for connecting the alternating current electric machines to receive alternating voltage of the external power grid, and the second power converter is suitable for transferring energy from the direct voltage source to the alternating current electric machines. Thus, the electric machines driving the auxiliary devices can be energized directly by the external power grid when the working machine is connected to the external power grid.