Abstract: A power transmission apparatus 101 includes a communication unit 206 configured to wirelessly communicate with a power reception apparatus using an antenna, a power transmission unit 203 configured to wirelessly transfer power to the power reception apparatus using the antenna, a detection unit 204 configured to measure at least either a voltage or a current output from the antenna in a period where the transfer of the power is stopped and the communication by the communication unit 206 is not performed, and determine that there is an object different from the power reception apparatus based on the result of the measurement, and a control unit 201 configured to, if there is determined to be the object different from the power reception apparatus, restrict the transfer of the power.

Abstract: An inductive power transfer transmitter comprising: an inverter sub-circuit comprising at least one inverter, and a tuned circuit comprising a plurality of components including at least: a transmitting coil; a first tuning network comprising: an inductor, and a capacitor; a second tuning network comprising a first additional component wherein the plurality of components are arranged such that the tuned circuit can: vary current through the transmitting coil to compensate for variations in K coefficient, provide an output current from the inverter sub-circuit independent of a transmitting coil current.

Abstract: An electric work vehicle includes a frame and a traction device coupled to the frame. Furthermore, the electric work vehicle includes an electric motor configured to drive the traction device and an energy storage device configured to supply electric energy to the electric motor. Additionally, the electric work vehicle includes an electric charging port configured to receive electric power from a power source, with the electric charging port being electrically coupled to the energy storage device. Moreover, the electric work vehicle includes an electric outlet configured to provide electric power to a remote device, with the electric outlet being electrically coupled to the electric charging port and the energy storage device. In addition, the electric work vehicle includes a computing system configured to control a distribution of the electric power received by the electric charging port between the energy storage device and the electric outlet.

Abstract: A wireless power transmission device and a control method thereof are provided. The wireless power transmission device includes a wireless power transmitter, a communication interface, a sensing coil, a light source driver, a light source, and at least one processor. The at least one processor is configured to control the wireless power transmitter to transmit first power supplied by the working coil to the cooking appliance, control the light source driver to measure second power induced in the sensing coil when the first power is transmitted, and control the light source driver to set at least one of a light emission intensity of the light source, a light emission color of the light source, or a light emission form of the light source, based on the amount of the second power.

Abstract: A power transmitter for wireless power transfer includes a control and communications unit configured to provide power control signals to a power supply external to the power transmitter for controlling a power level of a power signal configured for transmission to a power receiver, the power supply configured to configure a direct current (DC) power based on the power control signals. The power transmitter further includes an inverter circuit configured to receive the DC power from the power supply external to the power transmitter and convert the input power to a power signal. The power transmitter further includes a coil formed of wound Litz wire and including at least one layer, the coil defining, at least, a top face and shielding comprising a ferrite core and defining a cavity, the cavity configured such that the ferrite core substantially surrounds all but the top face of the coil.

Abstract: A switch device includes: a power supply terminal; an output terminal; a switch element configured to be connected between the above terminals; a signal output terminal configured to output an output current detection signal corresponding to an output current that flows during the on period of the switch element; an overcurrent protection circuit configured to restrict the output current detection signal to an overcurrent restriction value or less during the on period of the switch element; and an output abnormality detection circuit configured to monitor, while switching between a first state where no current is supplied to the output terminal and a second state where a current is supplied to the output terminal during the off period of the switch element, the output voltage of the output terminal in each of the first and second states, and to switch the logic level of the output current detection signal.

Abstract: Polyphase wireless power transfer systems are provided. The transfer system may be used for charging hybrid and electric vehicles. The systems are capable of transferring over 50 KW over an air gap of 15 cm. The systems use a rotating magnetic field to transfer power. The system may comprise transmitter coil assembly. The coil assembly may be one or more layers. The system may employ either unipolar or bipolar coils. The transmitter also comprises compensating capacitance connected in series with at least one coil for each phase. A value of the compensating capacitance for each phase is determined such that the transmitter has at least two independently excitable resonant modes at a resonant frequency. The transmitter is compatible with a plurality of different receivers including three-phase, single phase with a circular coil and single phase with DD coils.

Abstract: This application discloses a method for implementing a fast power response and a power plant. The method is applied to a power plant-end power control apparatus, and includes determining a whole-plant reactive power target value and/or a whole-plant active power target value of the power plant. The method also includes determining, based on the whole-plant reactive power target value and/or the whole-plant active power target value, a second power control instruction readable to each photovoltaic inverter or power conversion system in the power plant.

Abstract: An efficiently compensated Inductive Wireless Power Transfer (IWPT) system, comprising an LCT having a primary side and a secondary side; an inverter that converts the input DC power to AC power at a predetermined operating frequency, the output of the inverter is being connected to the self-inductance of the primary side of the LCT via a compensation network consisting of a combination of capacitors and at least one inductor and residing solely at the primary side; a rectifier for converting AC power, induced at the secondary side of the LCT, to DC power, the input of the rectifier is being connected to the self-inductance of the secondary side of the LCT; a load being connected to the output of the rectifier; a DC power supply for feeding DC power to the input of the inverter and generating an induced power that is fed to the load.

Abstract: A kitchen appliance is disclosed includes a first electrical component, a second electrical component, and a wireless power receiver system. The wireless power receiver system includes a first receiver antenna configured to couple with a first transmission antenna and receive virtual AC power signals from the first transmission antenna. A second receiver antenna is configured to couple with a second transmission antenna and receive virtual DC power signals from the second transmitter antenna. A first receiver power conditioning system is configured to receive the virtual AC power signals, convert the virtual AC power signals to AC received power signals, and provide the AC received power signals to power the first electrical component. The second receiver power conditioning system configured to receive the virtual DC power signals, convert the virtual DC power signals to DC received power signals, and provide the DC received power signals to power the second electrical component.

Abstract: A coil component includes a core including a winding core portion, a first flange portion, and a second flange portion, and a first wire and a second wire that are wound around the winding core portion in the same direction and that form a winding portion. The winding portion includes a second intersecting portion along a third side surface of the winding core portion at a position on the winding portion nearest to the second flange portion.

Abstract: According to one embodiment, a power feeding system includes power receiving units, communication units, and a power feeding unit. The power feeding unit is configured to stop feeding power to a first power receiving unit when the receiving level is lower than a first reference value, feed power to a second power receiving unit, stop feeding power to the second power receiving unit, and resume feeding power to the first power receiving unit.

Abstract: A power receiving device includes: power receiving unit configured to receive power wirelessly from a power transmitting device; receiving unit configured to receive first information related to a voltage of an inverter included in the power transmitting device from the power transmitting device; and transmitting unit configured to transmit a specific signal to the power transmitting device on the basis of second information which is determined on the basis of the first information, the power transmitting device that has received the specific signal restricting the voltage of the inverter.

Abstract: Various embodiments of a wireless connector system are described. The system has a transmitter module and a receiver module that are configured to wirelessly transmit electrical energy and/or data via near field magnetic coupling. The wireless connector system is designed to increase the amount of wirelessly transmitted electrical power over a greater separation distance. The system is configured with various sensing circuits that alert the system to the presence of the receiver module to begin transfer of electrical power as well as undesirable objects and increased temperature that could interfere with the operation of the system. The wireless connector system is a relatively small footprint that is designed to be surface mounted.

Abstract: When a communication unit receives an end power transfer (EPT) packet including information about a power transmission stop period from a power reception apparatus, a power transmission apparatus controls a power transmission coil to transmit a checking signal for checking existence of the power reception apparatus during the power transmission stop period, detects at least one of a voltage or a current applied to the power transmission coil when the checking signal is transmitted, and determines whether the power reception apparatus that has transmitted the EPT packet exists, based on the detection result.

Abstract: A wireless power supply apparatus that supplies power to a reception apparatus in a wireless manner, the wireless power supply apparatus including: a power source apparatus that outputs an AC power, a transmission coil electrically connected to the power source apparatus; and a setting circuit interposed between the power source apparatus and the transmission coil, setting the transmission coil to be in either a power feeding state or a standby state, wherein the setting circuit is provided separately from the power source apparatus.

Abstract: A dual-mode multi-coil wireless power transfer system includes a control unit and a transmitter unit. The transmitter unit may wirelessly transmit electric power to an external receiver coil. The transmitter unit include a plurality of transmitter modules. Each of the plurality of transmitter modules may operate in at least one of a power transfer mode and a leakage magnetic field shield mode. The control unit controls each of the plurality of transmitter modules to operate in at least one of the power transfer mode and the leakage magnetic field shield mode or to be turned off.

Abstract: The present invention relates to magnetic structures for wireless power transfers systems. In particular the invention relates to improved magnetic and ferrite layouts as well as pad designs and methods of predicting and preventing thermal failure of high-power ferrite structures. In part it relates to a wireless power transfer pad magnetic structure comprising at least two adjacent blocks are spaced apart by an inter-section spacing configured to reduce circulating flux in the layer. In part it relates to a wireless power transfer pad magnetic structure comprising a first surface configured to locate nearer a wireless power transfer coil than a second surface wherein the relative magnetic permeability of the magnetic structure increases with distance from the first surface. In part it relates to a method of preparing a magnetically permeable block for a wireless power transfer pad, the method comprising: thermally pre-cracking the magnetically permeable block.

Abstract: The present disclosure relates to an electrical line, a coil and an inductive power transfer device. The electrical line comprises a conductor carrier having at least two substantially parallel carrier layers and a plurality of circuit traces arranged on at least three different, substantially parallel carrier surfaces of the carrier layers. A single circuit trace of the plurality of circuit traces has at least three circuit track sections arranged on at least three different carrier surfaces. Two respective circuit trace sections of a circuit trace are connected to one another by a vertical connection extending transversely to the carrier surfaces and through at least one carrier layer. A plurality of circuit trace sections of different circuit traces is arranged on a carrier surface, which run parallel to one another at least in some areas and which run along a longitudinal extension direction at least in some areas.

Abstract: The present disclosure may provide a triboelectric generator equipped in an electronic device, the triboelectric generator including a power generating unit configured to generate electricity based on an ultrasound wave provided from outside, a first silicon layer arranged between an upper surface of the power generating unit and an inner surface of the electronic device, a second silicon layer arranged on a lower surface of the power generating unit, and a housing arranged to surround an outer periphery of the power generating unit, the first silicon layer, and the second silicon layer.