Abstract: A power transmitting device includes a power transmission unit using contactless power supply, processing circuitry configured to switch a power transmission mode of the power transmission unit between a normal output mode and a limit mode, and a transmission-side communication unit configured to execute communication with a power receiving device. The processing circuitry is configured to determine whether the power receiving device is a registered power receiving device based on information related to the power receiving device obtained from the transmission-side communication unit, determine whether the registered power receiving device is located inside a power transmission range of the power transmission unit, set the power transmission mode to the normal output mode when determining that the registered power receiving device is located inside the range, and set the power transmission mode to the limit mode when determining that the registered power receiving device is not located inside the range.

Abstract: A power transfer apparatus being a power transmitter (101) or power receiver (103) of a power transfer via a power transfer signal comprises a power coil (103, 107) for transferring power with a complementary power transfer coil (107, 103) being the other apparatus of the power transfer operation. A first communicator (205, 305) communicates data with the complementary power transfer apparatus using modulation of the power transfer signal. A second communicator (207, 307) communicates power transfer control data via a second communication channel that is independent of the power transfer signal and has a communication data rate at least ten times higher.

Abstract: A power system includes a bidirectional power transfer inverter that receives grid power and can be electrically connected with electric vehicle supply equipment, and an auxiliary battery electrically connected with the bidirectional power transfer inverter and that supplies power to the bidirectional power transfer inverter and electric vehicle supply equipment while the grid power is unavailable.

Abstract: Provided is a method for controlling a wind power installation and/or a wind farm having at least one wind power installation, particularly in the case of asymmetrical network voltages, comprising: measuring a first voltage of a first phase, a second voltage of a second phase and a third voltage of a third phase of a three-phase electrical system, calculating a symmetrical negative-sequence voltage system from the measured voltages including a first negative-sequence voltage, a second negative-sequence voltage and a third negative-sequence voltage, predefining setpoints for a negative-sequence current system depending on the calculated, symmetrical negative-sequence voltage system including a first negative-sequence current component, a second negative-sequence current component and a third negative-sequence current component, wherein the setpoints are defined such that a balancing of the measured voltages is achieved, feeding an asymmetrical three-phase AC current into a wind farm network or an electrical su

Abstract: A charging pad includes a side surface on which a charged terminal device is to be placed face to face. The side surface includes a protruding flat surface portion that is raised from a peripheral edge portion, a power transfer coil that is incorporated in a raised region of the protruding flat surface portion, and a holding mechanism that allows the charged terminal device at a predetermined position with respect to the power transfer coil.

Abstract: A device for wireless transmission of electrical energy to an energy receiver, including a support surface, on which the energy receiver is arranged during energy transmission. The device includes an induction coil for transmitting electrical energy and an air duct extending within the device from an opening formed in the support surface into the device. The opening is arranged over the induction coil. The air duct is routed through a winding of the induction coil, which is preferably arranged directly under the support surface. Advantageously, the support surface is essentially rectangular, and the opening is formed on or at least close to a longitudinal axis of the support surface and is formed at a distance from an edge of the support surface. At least one projection is formed on the support surface for holding the receiving unit at a distance from the support surface so that air conducted into the air duct can better flow underneath.

Abstract: This disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for a wireless power transmission apparatus that supports charging of one or more wireless power receiving apparatuses. The wireless power transmission apparatus may include multiple primary coils organized in groups (referred to as zones). Each zone may have a local controller for managing operation of one primary coil in the zone at a time. A master controller may selectively couple the primary coils to the local controllers. When a first primary coil is coupled to the local controller for a zone, the other primary coils in that zone may be disabled. The master controller may manage which primary coils from neighboring zones are coupled to their respective local controllers. Thus, when the first primary coil is activated, the adjacent primary coils (near the first primary coil) can be muted or disabled to mitigate undesirable interference.

Abstract: Provided are hybrid passive power filter and a three-phase power system. The hybrid passive power filter includes: a series passive harmonic isolation unit, a parallel passive filtering unit, and a harmonic load; the series passive harmonic isolation unit has an input terminal electrically connected to a power grid and an output terminal electrically connected to a first terminal of the harmonic load, and the series passive harmonic isolation unit is configured to isolate harmonics; and the parallel passive filtering unit has an input terminal electrically connected to the output terminal of the series passive harmonic isolation unit and an output terminal electrically connected to a second terminal of the harmonic load, and the parallel passive filtering unit is configured to filter out harmonics.

Abstract: A management system is configured to manage a power feed mat that wirelessly feeds power to a movable body. The power feed mat is configured to communicate while it is placed at a prescribed location. This management system includes a monitoring apparatus that monitors communication by the power feed mat and a processing apparatus that performs prescribed processing when the monitoring apparatus senses loss of the communication.

Abstract: A grid side inverter system includes a grid side inverter, a phase locked loop controller arranged to determine a phase of a dq-frame dependent on a monitored grid voltage vector in the dq-frame and a reference grid voltage vector in the dq-frame, a current reference decision unit arranged to generate a reduction of at least one of an active and a reactive current reference, wherein a decision to generate the reduction is based on an electrical parameter relating to the phase difference of the monitored grid voltage vector and the PLL vector, a current controller arranged to determine control signals for the grid side inverter for controlling generation of active and reactive power to the grid dependent on the active and reactive current references and monitored active and a reactive grid currents in the dq-frame.

Abstract: A wireless power receiving device, according to the disclosure, comprises: at least one power receiving antenna for sequentially receiving a plurality of different RF waves formed by a wireless power transmitting device; a communication circuit; and at least one processor, wherein the at least one processor is configured to confirm a plurality of pieces of strength information that indicates the strength of each of the plurality of different RF waves, confirm a plurality of pieces of phase information corresponding to each of the plurality of different RF waves, confirm, on the basis of the plurality of pieces of strength information and the plurality of pieces of phase information, an optimum phase value such that a received RF wave has a maximum strength, and transmit a communication signal including information about the optimum phase value to the wireless power transmitting device through the communication circuit. Additional various embodiments are possible.

Abstract: A vehicle power supply system, being mounted on a vehicle, includes: a main power supply system including a main low-voltage power supply and a normal load; and a backup power supply system including a backup low-voltage power supply and an emergency important load and connected to the main power supply system. A backup power supply control device of the backup power supply system is configured to execute a backup low-voltage power supply state estimation processing, and output a signal indicating that the backup low-voltage power supply is in a state allowing supplying electric power for operating the emergency important load based on an estimation result of the backup low-voltage power supply state estimation processing, in a case in which the state of the vehicle does not satisfy a predetermined condition.

Abstract: A vehicle includes first and second power supply cords. Positive and negative electrodes of a battery are connected to a first power supply portion and a first ground portion of a first circuit, respectively, by the first power supply cord, and connected to a second power supply portion and a second ground portion of the second circuit, respectively, by the second power supply cord. The first circuit includes a control circuit configured to measure voltages of the second power supply portion as a first voltage and as a second voltage with reference to a potential of the first ground portion and a potential of the second ground portion, respectively. In a case in which the first and second voltages have a predetermined relationship, power supplied from the second power supply cord to the second circuit is set to be a predetermined value or less.

Abstract: A DC voltage grid includes an electrical conductor electrically interconnecting electrical components, with a DC voltage applied between parts of the electrical conductor. An actuator is configured to vary the DC voltage such that a value of the DC voltage depends on at least one state of the DC voltage grid. Information about the at least one state is transmitted to the electrical components of the DC voltage grid by way of the DC voltage. A wind farm having wind turbines connected to such a DC voltage grid and a method for operating such a DC voltage grid or such a wind farm are also disclosed. The DC voltage of the DC voltage grid is controlled or regulated depending on a state of the DC voltage grid.

Abstract: The vehicle includes a first communication device for directly or indirectly communicating with the ground power supplying apparatus by wide area wireless communication with a communication distance of greater than or equal to 10 meters, and an electronic control unit. The electronic control unit is configured to request the ground power supplying apparatus cancel supply of power to the vehicle by the wide area wireless communication when a predetermined condition is satisfied.

Abstract: A method for managing the electrical consumption of a watch including a step of identifying a need to charge an accumulator of the watch, and a step of charging the accumulator through guided actuation of a control member of an electrical energy generation mechanism of the watch, if a need to charge is identified.

Abstract: A contactless power supply device that supplies electric power to a vehicle in a contactless manner, includes: a power transmission resonance circuit; a power source circuit supplying direct-current power; and a power transmission circuit converting the direct-current power of the power source circuit into alternating-current power and supplying alternating-current power to the power transmission resonance circuit. The power transmission circuit includes: an inverter circuit converting the direct-current power of the power source circuit into alternating-current power; and a power transmission-side immittance conversion circuit adjusting the alternating-current power of the inverter circuit and supplies the adjusted alternating-current power to the power transmission resonance circuit.

Abstract: In an embodiment, a method includes: wirelessly transmitting power using a transmitter LC tank; wirelessly receiving power from the transmitter LC tank using a receiver LC tank; interrupting wirelessly transmitting power for a slot period; during the slot period, shorting the receiver LC tank; during the slot period and after shorting the receiver LC tank, measuring a transmitter signal associated with the transmitter LC tank; determining a power loss associated with the wirelessly transmitting power based on the measured transmitter signal; and detecting a metallic object based on the determined power loss.

Abstract: A shield construction for transfer of wireless power is provided. The shield construction may be a magnetic shield having a plurality of layers and provided for a wireless transmitter or a wireless receiver, or both. The magnetic shield may include a first layer and a second layer, where the first layer may be nearer to a core than the second layer, and where the second layer may include a second layer area that is larger than a first layer area of the first layer. The wireless transmitter and the wireless receiver may be configured to multi-phase wireless power transfer.

Abstract: The invention relates to a system for sychronising energy sources coupled to an electrical grid supplying at least one electrical load of an aircraft, said system comprising: a main source of electrical energy supplying said electrical load comprising a multi-stage generator, said multi-stage generator comprising: a primary stage comprising a generator with permanent magnets, a secondary stage comprising an excitation, and a tertiary stage comprising a main generator; an auxiliary source of electrical energy supplying said electrical load; and a device for synchronising the main source and the auxiliary source, designed to measure an electrical voltage at the outlet of the primary stage of the main source, and to control the supply of said electrical load by means of the auxiliary source of electrical energy at an electrical voltage slaved to the characteristics of frequency and phase of the electrical voltage of the primary stage.