Abstract: An electric power supply system includes an electric power reception apparatus and an electric power supply apparatus adapted to supply electric power to the electric power reception apparatus when the electric power reception apparatus is placed on the electric power supply apparatus. The electric power supply apparatus includes a plurality of electric power supply units adapted to supply electric power by electromagnetic induction to the electric power reception apparatus. A selection unit of the electric power supply apparatus selects, from the total plurality of electric power supply units, a plurality of electric power supply units whose location corresponds to a position where the electric power reception apparatus is placed, and a control unit controls the supply of electric power such that electric power is supplied to the electric power reception apparatus from the selected plurality of electric power supply units.

Abstract: A photovoltaic solid-state transformer, a photovoltaic inverter system and a bidirectional high-voltage transformer are provided. The photovoltaic solid-state transformer includes: multiple single phase modules and a filter. Each of the single phase modules includes multiple multiple-output isolated DC/DC converters and multiple cascade DC/AC modules, where each of the multiple-output isolated DC/DC converters includes a DC/AC module, a high frequency transformer and multiple AC/DC modules. The multiple single phase modules are connected to the grid via the filter in a star connection or a delta connection. The DC/DC converters and the cascade DC/AC modules are simple logical switches and have conversion efficiency higher than 99%, such that the photovoltaic solid-state transformer has a reduced volume, and an improved overall efficiency higher than 98.5%.

Abstract: Systems, methods, and storage media for arranging a plurality of cells in a vehicle battery pack are disclosed. A method includes receiving, by a processing device, data pertaining to cells within a battery pack installed in each vehicle of a fleet of vehicles, the data received from at least one of each vehicle in the fleet and one or more battery testing devices, providing, by the processing device, the data to a machine learning server, directing, by the processing device, the machine learning server to generate a predictive model, the predictive model based on machine learning of the data, estimating, by the processing device, one or more electrical characteristics of each cell to be included in the vehicle battery pack based on the predictive model, and directing, by the processing device, an arrangement of the cells within the battery pack based on the electrical characteristics.

Abstract: A contactless power transmission apparatus includes a receiver that includes a resonant circuit including a receiver coil that receives electric power from a transmitter coil included in a transmitter and a resonant capacitor connected in parallel to the receiver coil. The receiver outputs, through an output coil having fewer turns than the receiver coil and a coil connected to the output coil, electric power received by the resonant circuit and rectifies the output power with a rectifier circuit. The transmitter includes a control circuit that controls a voltage and a switching frequency of alternating current power to be supplied to the transmitter coil from a power supply circuit to allow the contactless power transmission apparatus to continuously perform a constant voltage output operation.

Abstract: A hybrid energy storage device is provided. The energy storage device represents a combined capacitor and battery in modular form. The capacitor and the battery may be individually selected based on application needs, and then mechanically combined into a single electrical energy storage device. A method of forming a charge storage device is also provided herein. The method includes selecting a size for a capacitor, and selecting a size for a battery. A module for the capacitor having the selected size and a separate module for the battery having the selected size are then mechanically and electrically connected to form an integral energy storage device.

Abstract: An adaptor assembly for use with a battery-operated hand tool which includes a battery pack-accepting portion to which a battery pack can be connected utilizes an adaptor having a body which is positionable between the battery pack-accepting portion of the hand tool and the battery pack so that electrical current which is intended to flow between the battery pack and the hand tool during tool operation passes through the adaptor. A foot-operable ON/OFF switch is connected to the adaptor so that operation of the foot-operable switch selectively permits or shuts off the flow of electrical current between the battery pack and the hand tool so that when the adaptor is positioned between the battery pack-accepting portion of the hand tool and the battery pack, the ON/OFF operation of the hand tool can be controlled by way of the foot-operable ON/OFF switch.

Abstract: A door latch power supply device includes an electricity storage unit, a charger, a discharger, a contactless power receiver, an input port configured to be connected to an external power supply, an output port configured to be connected to an actuator, and an operation signal receiver configured to receive an operation signal sent in response to an operation for opening a door. While an input voltage input to the input port is higher than or equal to a first input threshold, the charger operates using power supplied from the external power supply so as to cause a storage voltage of the electricity storage unit to become a first storage voltage value, and the discharger outputs power in the electricity storage unit to the output port to place the actuator in the unlatched state in response to the operation signal received by the operation signal receiver.

Abstract: A DC low voltage power distribution unit for a power grid and the corresponding DC low voltage power distribution system. A DC low voltage power distribution unit has at least one input connector for connecting the power distribution unit to a DC power supply, an electric distribution circuit comprising an input line connected to said input connector, and a reference potential line. The input line branches off into a plurality of output lines. The electric distribution circuit also has current limiting means in each of the output lines, wherein a current limit value is provided by the current limiting means to limit an output power at each of the output lines to an inherently safe value. A plurality of output connectors are connected to the output lines and to the reference potential line, wherein each of the output connectors are configured for outputting low DC voltage to a DC load.

Abstract: Many embodiments provide an implant power management unit (IPMU) that includes a reconfigurable active rectifier (AR) for wireless power transfer (WPT), where the AR is configurable to operate in a plurality of different modes of operation, an adaptive load control (ALC) unit that accommodates power delivery with load requirements, where the ALC unit is configured to control AR voltage based upon a desired value, control circuitry that is configured to enable a full bridge rectifier in a regular mode of operation of the AR, a feedback circuit that adaptively generates offset current to compensate for switch delays in at least one active NMOS diode, and a feedback circuit that adaptively generates offset current to compensate switch delays in at least one active PMOS diode.

Abstract: A near field communication (NFC) device capable of operating by being powered by the field includes an NFC module for generating an electromagnetic carrier signal and modulating the carrier signal according to data to be transmitted, and an antenna circuit coupled to and driven by said NFC module with the modulated carrier signal. The device includes an RF front end coupled between said NFC module and said antenna circuit. The RF front end includes a balanced to unbalanced (Balun) transformer and a tuning capacitor to provide a function of an electromagnetic compatibility (EMC) filter. A powered by the field circuit of the NFC device is adapted to harvest energy from an external field to power said NFC device. The power by the field circuit is coupled to said Balun transformer via one or more impedance elements.

Abstract: The technology described herein relates to techniques for calibrating wireless power transmission systems for operation in multipath wireless power delivery environments. In an implementation, a method of calibrating a wireless power transmission system for operation in a multipath environment is disclosed. The method includes characterizing a receive path from a calibration antennae element to a first antennae element of a plurality of antennae elements of the wireless power transmission system, characterizing a transmit path from the first antennae element to the calibration antennae element, and comparing the transmit path to the receive path to determine a calibration value for the first antennae element in the multipath environment.

Abstract: An apparatus for providing metabolically-generated electrical power to an electronic device such as, for example, a mobile phone, tablet or other device comprising a thermoelectric generator in electrical communication with a generating induction coil for wirelessly inductively providing power to the electronic device. In embodiments, the apparatus may be housed within an enclosure adapted to receive the electronic device. In an embodiment, the battery may be a mobile phone case. In an embodiment, the apparatus may further comprise a rotary lens selection feature for presenting optical lenses of varying powers to a camera of a mobile phone or tablet. In embodiments, the thermo-electronic device may be a Peltier module. A cell phone case of the invention may be adapted to receive a cell phone and may comprise a Peltier module and a generating induction coil that either powers the cell phone directly, or charges the cell phone's battery.

Abstract: Systems and methods for orientation-independent, wireless charging of devices is provided. The methods disclosed herein comprise transmitters operating at different frequencies, which collectively generate a rotating magnetic field.

Abstract: A power supply apparatus includes a latch type first relay inserted between a system power supply and a load, where the latch type first relay includes a switch, a tripping coil configured to open the switch, and a closing coil configured to close the switch, an electricity storage system including a charging and discharging unit inserted between a secondary battery and the load, a non-latch type second relay including a contact and an operating coil configured to open and close the contact, where the operating coil is connected between the electricity storage system and the load, and a control circuit connected to the first relay via the contact of the second relay.

Abstract: The present invention relates to a wireless power control method and device for wireless charging, and the wireless power control method of a wireless power transmitter according to an embodiment of the present invention may comprise: a step of receiving, from a wireless power receiver, a first feedback signal requesting power control; a step of determining the intensity of a first transmission power on the basis of the first feedback signal; a step of determining an inverter type and a power control method which correspond to the determined intensity of the first transmission power; a step of activating an inverter corresponding to the determined inverter type; and a step of controlling the intensity of alternating current power outputted from the inverter, by using the determined power control method.

Abstract: A retrofit switch apparatus is designed to pair with a traditional switch device that has a traditional switch for accepting a first user manual operation to control a target device connected to the traditional switch device with an electrical wire. The retrofit switch apparatus has a cover body, a control cover, a control decoder, and a wireless transmitter. The cover body covers the traditional switch device. The control decoder and the wireless transmitter are disposed in the cover body.

Abstract: An inductive power transfer (IPT) system may include an inductive power transmitter having at least one power transmitting coil that generates an IPT field and an IPT director unit over the inductive power transmitter. The IPT director unit may include a low reluctance element such as a magnetic core configured to direct the IPT field from the inductive power transmitter to an inductive power receiver held in place over the IPT director unit (e.g., by a housing of the IPT director unit). While the IPT director unit directs the IPT field from the inductive power transmitter to the inductive power receiver, a mean direction and density of the IPT field entering the low reluctance element from the inductive power transmitter may be different from the mean direction and density of the IPT field exiting the low reluctance element towards the inductive power receiver.

Abstract: A contactless power receiving device includes a power receiving coil receiving power from a contactless power transfer device, a rectifier circuit rectifying the power to form a rectified output on a high potential side and a rectified output on a low potential side, a smoothing circuit receiving the rectified output on the high potential side and the rectified output on the low potential side, and a switching power supply converting a DC voltage from the smoothing circuit to a first voltage. The smoothing circuit includes a first inductor transmitting the rectified output on the high potential side, a second inductor transmitting the rectified output on the low potential side, and a smoothing capacitance element to which the rectified output on the high potential side and the rectified output on the low potential side are supplied, and the rectified output on the low potential side is connected to a ground potential.

Abstract: An electrical power restoration system for a circuit assembly having a circuit breaker, an electrical load and a circuit conditioner, includes a circuit controller that is positioned along the circuit assembly between the circuit breaker and the electrical load. The circuit controller is electrically connected to and selectively controls activation and/or deactivation of the circuit conditioner. The circuit conditioner is positioned along the circuit assembly between the circuit controller and the electrical load. The electrical power restoration system can further include a first hot conductor that selectively conducts AC power from the circuit breaker to the circuit controller. The circuit controller monitors a current passing through the first hot conductor to determine whether the current passing through the first hot conductor is at or above a predetermined threshold level.

Abstract: A control attachment for an in-wall power adapter configured to control the application of power to a load is described. The control attachment may comprise a plurality of contact elements; a first contact element of the plurality of contact elements configured to receive a power signal; a second contact element of the plurality of contact elements configured to provide the power signal to the load; a conductor electrically coupling the first contact element to the second contact element; wherein the control attachment enables the in-wall power adapter to control the application of power received at the first contact element to be applied to the load.