Abstract: The disclosure features wireless power devices for receiving power from a wireless power source. The devices include a first plurality of magnetic material pieces of substantially planar shape arranged in a first plane, where the first plurality of magnetic material pieces have a first planar surface and a second planar surface. The devices include a device resonator comprising at least one wound conductor disposed on the first planar surface and a second plurality of magnetic material pieces in a second plane, where at least one of the second plurality of magnetic material pieces overlaps at least one of the first plurality of magnetic material pieces and where a separation between the first and second planes is less than 2 mm.

Abstract: A power system including a first grid and a second grid, each grid having power flow parameters. A breaker installed at a point of common coupling between the first grid and second grid. A first sensor and a second sensor, each located on a side of the point of the common coupling for continually determining the power flow parameters of the first grid and second grid. Wherein the power flow parameters for the first and second grid are indicative of a frequency and a phase. A power source for supplying power to either the first grid or second grid. A controller for synchronizing the frequencies and the phases of the first and second grid, by continually adjusting an amount of power supplied, based on continually determining a frequency mismatch and a phase mismatch between the first grid and second grid, until a first predetermined condition is met.

Abstract: According to one embodiment, a wireless power transmission system includes: a power transmission device and a power reception device. The power transmission device includes an AC power generation circuit; first circuits connected to the AC power generation circuit; and power transmission resonators. The power reception device includes: power reception resonators, second circuits each connected to different one of the plurality of power reception resonators and a rectifier circuit. An absolute value of an open-circuit output reverse voltage gain in an F matrix of each of the plurality of first circuits is less than 1, and an absolute value of a short-circuit output reverse current gain in an F matrix of each of the plurality of second circuits is less than 1.

Abstract: Power loss is calculated in an inductive power transfer system comprising a power transmitter for transmitting power inductively to a power receiver via transmitter coil and receiver coil. The power transmitter obtains time information for time alignment to enable the power transmitter to align the time of calculating the power loss with the power receiver. Power loss is calculated during power transfer according to the obtained time information and received power parameter communicated from the power receiver.

Abstract: A vehicle includes a first battery configured to output power at a first voltage, a second battery configured to output power at a second voltage, and a direct current (DC)-DC converter configured to convert the first voltage of the first battery to the second voltage and supply power at the second voltage to the second battery. The DC-DC converter includes a transformer, at least one switch, at least one rectifying diode, and a snubber circuit. The transformer is configured to transform the first voltage to the second voltage. The at least one switch is configured to control a first current input to the transformer from the first battery. The at least one rectifying diode is configured to rectify an alternate current (AC) output from the transformer. The snubber circuit is configured to prevent overvoltage from being applied to the at least one rectifying diode.

Abstract: A power system including a first and a second grid, each grid having power flow parameters. A breaker installed at a point of common coupling between the first and second grid. A first and a second sensor, each located on a side of the point of the common coupling for determining the power flow parameters of the first and second grid. A controller, iteratively controls a power source to supply a first amount of power, based on determining a frequency mismatch between the first and the second power grid, until a first predetermined condition is met. Then, determines if the first and second grid reach a second predetermined condition of phase mismatches and frequencies mismatches of the first and second grid, and if not, iteratively control the power source to supply a second amount of power until the second predetermined condition is met, then places breaker in closed position.

Abstract: A wireless power receiver includes circuitry configured to receive a wirelessly induced voltage from a wireless power transmitter via a magnetically induced connection with the wireless power transmitter. It is determined that an overvoltage condition exists when the wirelessly induced voltage exceeds a threshold voltage, and the wirelessly induced voltage is reduced in response to determining that the overvoltage condition exists. The circuitry communicates the overvoltage condition to the wireless power transmitter via the magnetically induced connection while over-voltage protection is enabled.

Abstract: Exemplary embodiments are related to switch linearizer. A device may include at least one switch. The device may further include a linearizer coupled to the at least one switch and configured to cancel at least a portion of distortion generated by the at least one switch in an off-state.

Abstract: A power supply apparatus includes a power supply unit configured to wirelessly supply power to an electronic apparatus, a communication unit configured to communicate with the electronic apparatus, and a control unit configured to perform control whether to supply power to the electronic apparatus according to whether the electronic apparatus is capable of updating information about the electronic apparatus.

Abstract: In various embodiments, an apparatus for driving a load is disclosed. In one example, the apparatus comprises an input configured to, in a first state, receive an input signal, an output configured to, in the first state, provide a first output signal to a series arrangement of the load and a source, wherein the first output signal is configured to feed the load and to charge the source with input power provided via the input signal, and a converter configured to, in a second state different from the first state, convert a source signal from the source into a second output signal destined for the load, wherein the second output signal is configured to feed the load with source power provided by the source.

Abstract: An in-vehicle inverter device includes a noise reduction circuit, which has a common mode choke coil configured to reduce common mode noise and normal mode noise contained in DC power, and an inverter circuit, which receives the DC power in which the noise has been reduced. The noise reduction circuit includes: an input-side capacitor and an input-side resistor provided on the input side of the choke coil; an output-side capacitor and an output-side resistor provided on the output side of the choke coil; a first filter circuit that includes the choke coil, the input-side capacitor, and the input-side resistor; and a second filter circuit that includes the choke coil, the output-side capacitor, and the output-side resistor. The first and the second filter circuits reduce leakage noise generated in the inverter circuit.

Abstract: An abnormality detection device for a grid interconnection relay to detect an abnormality of the grid interconnection relay upon switching to grid independent operation, and includes an abnormality detector to execute commercial power system voltage determination of determining whether or not there is a commercial power system voltage, and first voltage determination to be executed if it is determined that there is no commercial power system voltage through the commercial power system voltage determination, of causing the power conditioner to chronologically alternately output monitor voltages having different values in a state where a contact of the grid interconnection relay is controlled to open and executing abnormality determination as to the grid interconnection relay according to whether or not each of the monitor voltages is followed by difference between a voltage of the power conditioner and voltage of the commercial power system with respect to corresponding one of the monitor voltages.

Abstract: Apparatus embodiments of the invention are disclosed for requesting power via a wired interface. In example embodiments, a pull-down circuit in the apparatus acting as a power consumer when there is no energy in the apparatus, is connected via a configuration line over a cable to a power provider device. The apparatus may be in a power down mode, it may have an empty battery, or it may have no battery. The pull-down circuit is configured to use energy from the configuration line to pull down a voltage on the configuration line, to signal the power provider device to provide power over another line of the cable to the apparatus.

Abstract: A solar and wind energy harvesting system having a support structure with a pair of poles and a plurality of transversal members that extends between the pair of poles, a plurality of transducers affixed to a corresponding transversal member of the plurality of transversal members, a plurality of photovoltaic cells, wherein each photovoltaic cell is suspended from a corresponding transducer of the plurality of transducers and receives sunlight to provide sunlight input electricity and wind to bend the corresponding transducer and have the corresponding transducer provide wind input electricity, and a battery assembly that is electrically connected to the plurality of transducers and the plurality of photovoltaic cells to receive, regulate and store the solar input electricity and the wind input electricity.

Abstract: Power over Ethernet (PoE) communication systems, control circuits and methods are presented for controlling power delivered to a powered device through a communication cable, in which a power sourcing equipment measures a supply voltage and selectively discontinues provision of power from a power source in response to a measured supply current exceeding an adaptive limit signal representing a supply current level corresponding to a predetermined safe operating power level at the measured supply voltage.

Abstract: Aspects of capacitor voltage ripple reduction in modular multilevel converters are described herein. In one embodiment, a power converter system includes a modular multilevel converter (MMC) electrically coupled and configured to convert power between two different power systems. The MMC includes one or more phase legs having a cascade arrangement of switching submodules, where the switching submodules include an arrangement of switching power transistors and capacitors. The MMC further includes a control loop including a differential mode control loop and a common mode control loop. The differential control loop is configured to generate a differential control signal based on a target modulation index to reduce fundamental components of voltage ripple on the capacitors, and the common mode control loop is configured to inject 2nd order harmonic current into a common mode control signal to reduce 2nd order harmonic components of the voltage ripple on the capacitors.

Abstract: A redundant power supply control circuit including a power isolating circuit and a soft start circuit is provided. The power isolating circuit is configured to isolate a first power provided by a first power device from a second power provided by a second power device. When the first power is provided to the redundant power supply control circuit, the power isolating circuit outputs the first power as a main power, and otherwise, the power isolating circuit outputs the second power to a load. The soft start circuit is coupled to the power isolating circuit to receive the main power. The soft start circuit is enabled after the soft start circuit receives the main power, such that the soft start circuit outputs the main power to the load.

Abstract: An apparatus comprising an onboard energy storage device, an onboard power conversion device configured to be electrically coupled to an external power source for receiving electrical power therefrom, and at least one drive system electrically coupled to the onboard energy storage device and the onboard power conversion device, wherein the onboard energy storage device and the onboard power conversion device cooperatively provide electrical power for the at least one drive system. A vehicle and a method for managing power supply are also disclosed.

Abstract: The present invention relates to a Voltage converter (100) for converting an input voltage (V10) to an output voltage (V20) comprising an input circuitry (102) for receiving the input voltage (V10) from a power supply (112), wherein the input circuitry includes chopper means (110) for chopping a voltage (V12) derived from the input voltage (V10) at a chopper frequency to a chopped voltage (V14), an inductive transformer unit (106) for transforming the chopped voltage (V14) to a chopped AC voltage (V16), and an output circuitry (104) for converting the chopped AC voltage (V16) of the inductive transformer unit (106) to the output voltage (V20) having a lower frequency than the chopper frequency.

Abstract: An improved power manager includes a power bus (410) and multiple device ports (1-5), with at least one device port configured as a universal port (3 and 4) to be selectively connected to the power bus over an input power channel that includes an input power converter (510) or over a output or universal power channel (412, 416) that includes an output power converter (440, 442). The universal power channel (412) allows the input port (4) to be selected as an output power channel instead of an input power channel (i.e. operated as a universal port) for outputting power to device port (4) over power converter (440). The improved power manager (500) includes operating modes for altering an operating voltage of the power bus (505), to minimize overall power conversion losses due to DC to DC power conversions used to connect non-bus voltage compatible power devices to the power bus.