Abstract: An operation method for a backup power supply of an electronic system is provided. The backup power supply includes a fuse. The operation method includes: estimating a reading voltage error and a resistance of the fuse; reading a real-time battery discharging current; reading and calculating a voltage difference between two terminals of the fuse; and determining whether to send a fuse replacement message to the electronic system according to the voltage difference between the two terminals of the fuse, the reading voltage error, the resistance of the fuse and the real-time battery discharging current.

Abstract: Harmonics of a power output of a power plant at a point of common coupling between the power plant and a utility grid, wherein the power plant comprises a plurality of energy production units. The method comprises determining an electrical characteristic at the point of common coupling; determining the electrical characteristic at an output terminal of each of the energy production units and dispatching a control signal to at least one of the energy production units to control the electrical characteristic at an output terminal of the respective energy production units. The control signal is based on the measurement of the electrical characteristic at the point of common coupling and arranged for damping the harmonic of the power output of the power plant at the point of common coupling, wherein the control signal is determined on the basis of a predetermined prioritizing sequence of said electrical characteristic.

Abstract: A power transmission device for a noncontact power supply device includes a resonant circuit that outputs an alternating magnetic flux by power from a power source circuit, and switching elements for making the resonant circuit generate an alternating magnetic flux, and transmits power to a power receiving coil of a power reception device by the alternating magnetic flux. A power transmission controller of the power transmission device includes a transmission mode of supplying alternating power to the resonant circuit by repeating ON and OFF of switching elements by controlling switching elements. ON time in one cycle of operation of each of switching elements used in the transmission mode is a first fixed value. Accordingly, the power transmission device in a simplified configuration can be provided.

Abstract: A current sensing circuit and a minimum operating frequency for a wireless power transmission system is presented. A method of measuring current through a wireless power transmit coil, includes receiving a signal from a switching circuit into a sampling circuit; filtering the sampled signal from the sampling circuit; biasing the filtered sampled signal, wherein the biasing occurs only when the sampling circuit is active; and amplifying the biased signal to provide a transmit coil current signal. A method of measuring current through a wireless power transmit coil, includes receiving a signal from a switching circuit into a sampling circuit; filtering the sampled signal from the sampling circuit; biasing the filtered sampled signal, wherein the biasing occurs only when the sampling circuit is active; and amplifying the biased signal to provide a transmit coil current signal.

Abstract: A method of controlling a power receiver. The method includes entering a negotiation phase with a power transmitter including transmitting a foreign object detection status packet including at least one of a reference quality factor and a reference quality factor peak frequency to the power transmitter, and receiving a NAK response from the power transmitter indicating the power transmitter has detected the foreign object is present based on the foreign object detection status packet or receiving an ACK response from the power transmitter indicating the power transmitter has detected the foreign object is not present based on the foreign object detection status packet; and entering a power transfer phase including receiving a first power from the power transmitter in response to the received NAK response and receiving a second power greater than the first power in response to the received ACK response.

Abstract: A wireless power transmission device for a vehicle and a method are provided. The wireless power transmission device for a vehicle may transmit a signal for detection of a wireless power reception device by using a lower frequency band that is different from an operating frequency band used to control the vehicle. The wireless power transmission device may receive a response signal for the transmitted signal and a power control signal from the wireless power reception device. The wireless power transmission device may control an operating frequency or a voltage (or both) in the wireless power transmission device for the vehicle according to the power control signal. The wireless power transmission device may transmit wireless power to the wireless power reception device.

Abstract: Aspects of the disclosure provide an uninterruptible power supply comprising an input configured to receive input power from an input-power source, the input having a mains neutral connection coupled to a reference node, an energy-storage-device interface configured to be coupled to an energy-storage device to provide back-up power, the energy-storage-device interface having an energy-storage-device neutral connection coupled to the reference node, an output configured to provide output power derived from at least one of the input power and the back-up power, a power-factor-correction circuit (PFC) comprising a PFC input, a capacitor coupled to the PFC and being galvanically coupled to the energy-storage-device interface, a bidirectional converter coupled to the input and coupled to the energy-storage-device interface, and a switch coupled to the energy-storage-device interface and to the PFC input.

Abstract: An electrical power supplying and cord management system including: a module docking station having a module docking receptacle and base station portion having integrated external power cord storage compartments for power cord management; and a multi-function dockable module dockable in the module docking receptacle and manually removable and useable locally as well as at remote locations.

Abstract: A power transfer system includes a series of energy storage modules (ESMs) or energy storage devices (ESDs) that are coupled together to be able to transfer power between one another, as well as receive power from a power source, such as an onshore power generator. The energy storage modules may be hybrid energy storage modules, each including an electrical-machine-inertial energy store and an electro-chemical energy store. The energy storage modules are configured to receive constant-current DC or AC input from the power source, and are able to provide constant-current and constant-voltage output, either sequentially or simultaneously. The power transfer system allows the modules to operate independently or in conjunction with one another, should some of the connections of the system be broken. The energy storage modules may be used to provide power to underwater systems, for example sonar systems, weapons systems, or underwater vehicles.

Abstract: A wireless power transmitting device may transmit wireless power signals to a wireless power receiving device. The wireless power receiving device may have a housing. A display may be mounted in the housing on a front face of the device. A rear housing wall on a rear face of the device may be provided with a wireless power receiving solenoid. The solenoid may have a linear strip shape that extends along a longitudinal axis. The longitudinal axis may extend perpendicularly to a wrist strap coupled to the housing. The wireless power receiving solenoid may have opposing first and second ends. The wireless power transmitting device may have a wireless power transmitting solenoid with opposing first and second ends that are configured to transmit the wireless power signals respectively to the first and second ends of the wireless power receiving device when the wireless power receiving solenoid is within the cradle.

Abstract: An actuator in a HVAC system includes a mechanical transducer, an input connection configured to receive a power supply line voltage, and a voltage divider circuit. The voltage divider circuit includes a first capacitor in series between the input connection and the mechanical transducer, a second capacitor in parallel with the first capacitor between the input connection and the mechanical transducer, and a first transistor operable to connect and disconnect the first capacitor and/or the second capacitor from the voltage divider circuit based on the power supply line voltage, thereby adjusting a capacitance between the input connection and the mechanical transducer. The voltage divider circuit is configured to receive the power supply line voltage from the input connection, use at least one of the first capacitor or the second capacitor to reduce the power supply line voltage to a reduced voltage, and provide the reduced voltage to the mechanical transducer.

Abstract: Drive system for an aircraft, including: a propeller; electric motor; transmission system for transmitting positive torque from the motor to drive the propeller and negative torque from the propeller in windmill braking state to drive the motor; interface for inputting an input; first unit for controlling torque acting on the motor; second unit for detecting rotational speed of the motor; selection unit to select an active mode from propulsion mode and recovery mode, wherein the motor generates recovery energy in the recovery mode; and management system to control energy flow in an electrical system of the aircraft, the electrical system including the motor, is controlled according to the active mode; wherein the selection unit is configured to select the active mode according to the input, rotational speed, and predefined envelope, wherein the envelope indicates a maximum positive torque and minimum negative torque that depends on the rotational speed.

Abstract: A device includes at least one isolating transformer. An input is coupled to the at least one isolating transformer and configured to receive input from an energy source. At least one power switch is coupled to the isolating transformer. A diode is coupled to the at least one isolating transformer. An energy storage medium is coupled to the diode. An inverter includes one or more inverter switches, an inverter input, and an inverter output. The inverter input is coupled to the diode and the energy storage medium. The inverter output is configured to be coupled to the power network, and the inverter is configured to create AC power for distribution to the power network. A controller is configured to modulate the at least one power switch to control power flow from the input and to modulate the state of the inverter switches to control power flow to the power network.

Abstract: An apparatus for determining a sensing error of a LDC, which controls and senses an output and an output cutoff of a first current inputted to a first load of a vehicle and an output and an output cutoff of a second current for charging a battery, includes a battery control device that senses the second current and a third current for discharging the battery; a power control device that receives the first current, the second current, and the third current and calculates a fourth current inputted to a second load for controlling the vehicle driving by controlling an operation of switching element; and a controller that determines whether the sensing error of the LDC occurs based on the first current, the second current, the third current, and the fourth current.

Abstract: A method described delivers power to a first load and a second load from networked power plants. The method may include receiving a power delivery profile for the first load, receiving a power delivery profile for a second load, determining a power output capability of a first renewable energy power plant (REPP), and determining a power output capability of a second REPP. The method may also include setting a power output for the first REPP and a power output for the second REPP based on the power delivery profile for the first and second loads and the power output capabilities of the first and second REPPs. The method may also include allocating a combined power output of the first and second REPPs to the first and second loads and delivering the allocated combined power output to the first and second loads.

Abstract: Methods and apparatuses for use in tuning reactance are described. Open loop and closed loop control for tuning of reactances are also described. Tunable inductors and/or tunable capacitors may be used in filters, resonant circuits, matching networks, and phase shifters. Ability to control inductance and/or capacitance in a circuit leads to flexibility in operation of the circuit, since the circuit may be tuned to operate under a range of different operating frequencies.

Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device may be a wireless charging mat or other device with one or more wireless power transmitting coils for transmitting wireless power signals. The wireless power receiving device may be a portable electronic device with one or more wireless power receiving coils for receiving the transmitted wireless power signals. The wireless power transmitting device may have foreign object detection coils. Q-factor measurements may be made on the transmitting coil during wireless power transmission and/or voltage measurements may be made using the foreign object detection coils to detect whether a foreign object is present. The foreign object detection coils may include overlapping coils with different winding patterns to enhance foreign object detection coverage.

Abstract: A method for operating an electric power converter and an electric power converter configured to convert DC power into AC power supplied to a three-phase AC network, conclude, during the converting, that a single-phase tripping has started in the three-phase AC network connected to the three-phase output of the converter, and after the concluding that the single-phase tripping has started in the three-phase AC network, control an active current in the three-phase output of the converter such that a negative sequence voltage in the three-phase output of the converter remains at or below a predetermined level, wherein the converter is configured to perform the controlling until concluding that the single-phase tripping has ended in the three-phase AC network.

Abstract: A communication control device comprises: an antenna; and a control unit that controls wireless communication related to wireless power transfer to a power receiver device through a power transmitter device. The control unit acquires via the antenna a radio wave status of each of a plurality of channels related to the wireless communication. The control unit acquires a power transmission status of the wireless power transfer. The control unit sets, based on the acquired power transmission status, switching conditions for switching the channel according to the radio wave status. The control unit causes the channel to be switched based on the radio wave status and the switching conditions. The control unit causes the wireless communication to continue on the switched channel.

Abstract: An arrangement for power distribution on a vessel, having: a first DC bus operating at a first medium voltage; at least one second DC bus operating at a second medium voltage and having no direct connection with the first DC bus; a first AC bus operating at a low voltage; a first inverter coupled between the first DC bus and the first AC bus for allowing power flow from the first DC bus to the first AC bus in a first operation mode; a second AC bus operating at the low voltage; a second inverter coupled between the second DC bus and the second AC bus for allowing power flow from the second DC bus to the second AC bus in the first operation mode; a low voltage connection system for selectively connecting or disconnecting the first AC bus and the second AC bus.