Abstract: According to various embodiments, a dual-band multi-receiver (DBMR) wireless power transfer (WPT) system is disclosed. The WPT system includes a transmitter including a first dc-dc converter coupled to a first inverter, a second dc-dc converter coupled to a second inverter, a reactance steering network (RSN) coupled to the first and second inverters, a high frequency transmitting coil coupled to the RSN, and a low frequency transmitting coil coupled to the first and second dc-dc converters. The WPT system further includes one or more receivers, each receiver including a high frequency receiving coil, a low frequency receiving coil, and a rectifier coupled to the high frequency receiving coil and low frequency receiving coil.

Abstract: Modern living involves using a significant amount of energy, much of which may be wasted or not used efficiently. This apparatus and methodology focuses on potentially wasted energy that is being produced but unused by fluorescent lights in buildings. Wasted energy is harvested using photovoltaic cell technology. Energy harvested per presently disclosed subject matter may be used for other local electrical devices, or sent back into the grid for the building to use, or stored for later use. One of the local uses may include an associated wireless device to send information to a cell phone and stored locally on a computer. Energy harvesting circuitry disclosed herewith is both compact and low cost.

Abstract: Provided are a power control device and control method employed therein. The power control device is provided with: a storage battery connected between the solar cell and the power conditioner; a converter, which is disposed between the storage battery and the solar cell, and which charges the storage battery with output power of the solar cell; and a control unit which controls the converter such that the converter charges the storage battery with differential power between the output power of the solar cell and the output power of the power conditioner in the cases where it is determined that the output of the solar cell will be larger than the outputtable power of the power conditioner.

Abstract: There is provided a detecting apparatus including one or a plurality of magnetic coupling elements that include a plurality of coils, and a detector that measures an electrical parameter related to the one or plurality of magnetic coupling elements or to a circuit that at least includes the one or plurality of magnetic coupling elements, and determines from a change in the electrical parameter whether a foreign matter that generates heat due to magnetic flux is present. In the one or plurality of magnetic coupling elements, the plurality of coils are electrically connected such that magnetic flux produced from at least one or more of the plurality of coils and magnetic flux produced from remaining coils of the plurality of coils have approximately opposing orientations.

Abstract: A power supply device (10) for a seat that can slidably move relative to a rail (15) that is provided in the floor portion (11) of an automotive body, the power supply device (10) including: the power transmission unit (20) that is provided in the floor portion (11); the rotation shaft portion (40) that is fixed to the seat, and serves as the rotation axis of the seat; and the power reception unit (30) that is fixed to the rotation shaft portion (40) and is configured to receive power from the power transmission unit (20).

Abstract: An electric charge management device for a vehicle includes a display screen and circuitry. The circuitry sets a first threshold value for a first discharge level of a battery of the vehicle. The first discharge level is greater than a zero state of charge (SOC) of the battery. The circuitry sets a second threshold value for a second discharge level of the battery based on first information associated with the vehicle and/or a user of the vehicle. The circuitry determines a first energy cost for an energy amount between the second discharge level and a current SOC of the battery. The circuitry controls the vehicle to transfer the energy amount to an external electric power system, which is different from the electric charge management device, based on the determined first energy cost.

Abstract: A maximum power point tracking optimizer is connected to and powered by at least one solar cell. The maximum power point tracking optimizer configured to operate: in a pass-through mode when said at least one solar cell voltage is greater than a passthrough threshold and greater than a ratio of the open-circuit voltage of said at least one solar cell, said pass-through mode flowing current through a pass-through circuit; in an optimizing mode when said at least one solar cell voltage is greater than an optimizing threshold and less than a ratio of the open-circuit voltage of said at least one solar cell, said optimizing mode modulating current flow using a DC-to-DC switching circuit to direct the voltage of said at least solar cell towards said ratio of the open-circuit voltage; in an active bypass mode when said at least one solar cell voltage is less than an active bypass threshold, said active bypass mode flowing current through an active bypass circuit.

Abstract: A wireless power-supply control apparatus to perform control on transmission of power from at least one power transmitter comprising a plurality of first antennas to a plurality of power receivers, has a first communicator and a controller. The first communicator to receive propagation path information between the power transmitter and the plurality of power receivers and requested-power information on requested power of the plurality of power receivers, from the power transmitter or the plurality of power receivers. The controller to control power to be transmitted from the power transmitter to a predetermined value and control at least either one of a phase or an amplitude of power to be supplied to the plurality of first antennas, based on the propagation path information and the requested-power information, so that a specific number of power receivers receiving power larger than the requested power is equal to or larger than a predetermined number.

Abstract: An example system can determine a power consumption of each of a first and a second powered device ports, determine an output voltage demand of each of the first and the second powered device ports based on the determined power consumptions, and based on the output voltage demand, adjust an output voltage to each of the first and the second powered device ports via the power controller.

Abstract: In at least one embodiment, a system may include a plurality of uninterruptible power supplies (UPSs), a ring bus, a plurality of chokes, with each choke of the plurality of chokes electrically coupling an associated UPS of the plurality of UPSs to the ring bus, and at least one switch electrically coupled between at least one UPS of the plurality of UPSs and the ring bus, with the at least one switch having an opening time of less than 10 milliseconds.

Abstract: An intelligent wearable device and a power supply method for the intelligent wearable device are provided, which can prolong a standby time of a battery such that the intelligent wearable device can still complete a main function within a specific time period when the battery cannot output a current. The intelligent wearable device including a controller configured to control a non-basic functional circuit to stop working, and control a self-powered circuit to supply power to a basic functional circuit when the output voltage is less than a first voltage threshold; or control the self-powered circuit and the battery-powered circuit to supply power to the basic functional circuit and the non-basic functional circuit when the output voltage is greater than or equal to the first voltage threshold. The intelligent wearable device is applied to the field of customer electronics.

Abstract: A power controller includes: a plurality of switching elements provided in one-to-one correspondence with a plurality of power supplies, and each of which switches on or off to switch between supplying and stopping supplying a load with electric power from a corresponding one of the plurality of power supplies; a processing unit which computes an operation amount for adjusting an amount of the electric power supplied to the load; and a signal generator which determines, for each control, a switching-element count indicating a total number of switching elements to be turned on among the plurality of switching elements, and a duty ratio of the switching-element count, based on the operation amount, and generates a drive signal for driving the plurality of switching elements successively, based on the switching-element count and the duty ratio.

Abstract: A switching mode front end surge protection circuit protects downstream devices from a load dump. Specifically, the switching mode front end surge protection circuit includes a metal-oxide-semiconductor field-effect transistor (MOSFET) that operates in either one of two modes based on an input voltage provided by an alternator. When the input voltage is less than a voltage threshold value, the MOSFET operates in a pass-through mode. When the input voltage is greater than the voltage threshold value, the MOSFET operates in a switching mode to oscillate between an on state and an off state.

Abstract: An on-board control device relays data communication between a vehicle module and a vehicle ECU which generates a signal for commanding a driving mode of a vehicle. The on-board control device includes a first interface via which communication with the vehicle ECU is performed, and a second interface via which communication with the vehicle modules is performed. The first interface relies on specifications for communication with the vehicle ECU, and the second interface does not rely on the specifications for communication with the vehicle ECU.

Abstract: A redundant power transfer apparatus provides an uninterrupted power transfer for a rear-stage circuit. The redundant power transfer apparatus includes a main loop switch coupled to a main power source, a standby loop switch coupled to a standby power source, and a control unit. The control unit controls the redundant power transfer apparatus to make the main power source or the standby power source supply power to the rear-stage circuit.

Abstract: The present disclosure relates to systems for providing wireless power to implanted devices. Consistent with some embodiments, an antenna system for providing wireless power to an implanted device includes a primary antenna loop and at least one parasitic antenna loop. The primary antenna loop is configured to receive power from a power source and radiate the power toward the implanted device. The at least one parasitic antenna loop is configured to absorb a portion of the radiated power and to reradiate the absorbed power toward the implanted device. The power radiated by the primary antenna loop and the power reradiated by the at least one parasitic antenna loop form a wireless power transmission pattern broadly distributed at the surface of the individual's skin and becomes more focused as it travels into the individual's body toward the implanted device.

Abstract: A battery balancing system includes an energy balancing circuit. Multiple battery cells are coupled to the energy balancing circuit. A health assessment circuit is coupled to the multiple battery cells and configured to sense a state of health and a charge of each of the multiple battery cells. The balancing circuit switches energy between the multiple battery cells as a function of the sensed state of health and state of charge of each of the multiple battery cells to balance charge there between.

Abstract: A vehicle includes a track that defines a guide channel, first and second transmitters positioned on first and second sides of the guide channel, respectively, and a bridge that extends over an upper portion of the track to cover the guide channel when the bridge is in a closed position.

Abstract: An IV curve scan method for a photovoltaic module and an optimizer are provided. The optimizer receives an IV curve scan signal and controls an output voltage of the photovoltaic module corresponding to the IV curve scan signal to change from an open-circuit voltage to a preset minimum voltage according to a preset rule, while photovoltaic module connected to another optimizer can still operate normally, so that the system can operate normally. Then the optimizer uploads IV curve data of the photovoltaic module corresponding to the IV curve scan signal, to complete an IV curve scan on a single photovoltaic module.

Abstract: A switching system includes a transformer and a switching assembly for controlling conduction of current from a power source to a first load along a power cable. The switching assembly includes a switch cell conductively coupled to the power cable. The transformer has a primary winding and a secondary winding. The secondary winding is conductively coupled to the switch cell. The primary winding is conductively coupled to a switch controller via the power cable. The transformer is configured to receive an activation control signal from the switch controller at the primary winding via the power cable and convey the activation control signal to the switch cell via the secondary winding. The switch cell is configured to activate and conduct the current from the power source to the first load along the power cable responsive to receiving the activation control signal from the switch controller.