Abstract: A wireless inductive power transfer system comprises a power transmitter for transmitting power inductively to a power receiver via transmitter coil 11 to receiver coil 21. In the system, a communication method comprises a step 37 of transmitting, by the power receiver, first data and second data to the power transmitter, the first data indicating a modulation requirement, and the second data indicating an inquiry message; a step 32 for receiving, by the power transmitter, the first data and the second data from the power receiver, a step 34 for transmitting, by the power transmitter, a response message for responding to said inquiry message, by modulating a power signal according to said modulation requirement so as to carry the response message; and a step 35 for receiving the response message by the power receiver by demodulating the modulated power signal carrying the response message received via the receiver coil from the power transmitter.

Abstract: A method for the computer-assisted configuration of an electrical power grid is provided. Grid forming generating unit nodes are provided in the power grid as first grid nodes and grid-boosting generating unit nodes are optionally provided as second grid nodes. The latter nodes are regenerative energy generation plants such as, for example, photovoltaic systems. In the method, closed-loop control methods and in particular proportional control of the generating unit nodes are set on the basis of a suitable dynamic model of the power grid such that an optimization problem is solved with the aim of optimum operation of the power grid in respect of one or more optimization criteria.

Abstract: An RF signal generator wirelessly transferring power to a wireless device includes, in part, a multitude of generating elements generating a multitude of RF signals transmitted by a multitude of antennas, a wireless signal receiver, and a control unit controlling the phases and/or amplitudes of the RF signals in accordance with a signal received by the receiver. The signal received by the receiver includes, in part, information representative of the amount of RF power the first wireless device receives. The RF signal generator further includes, in part, a detector detecting an RF signal caused by scattering or reflection of the RF signal transmitted by the antennas. The control unit further controls the phase and/or amplitude of the RF signals in accordance with the signal detected by the detector.

Abstract: An electromagnetic shielding layer and a wireless electrical energy transmission device having the electromagnetic shielding layer are provided. A first shielding layer is composed of a hollow area and a solid area. At the hollow area, because the magnetoresistance of the air is greater than the magnetoresistance of the magnetic sheet, it is not easy for the magnetic lines of flux of the high frequency magnetic field of the primary transmitting coil to pass the hollow area, so that the inductance value of the primary transmitting coil won't be affected easily by the change of the magnetoresistance during working Under the receiving coil is provided with magnetic sheet as much as possible to ensure the coupling of the receiving coil and the transmitting coil and to enhance the transmission efficiency.

Abstract: A source device and a method for controlling a magnetic field using two source resonators in a wireless power transmission system are provided. A device configured to control a magnetic field, includes resonators configured to form the magnetic field to transmit power to another device. The device further includes a magnetic field shape determining unit configured to determine a shape of the magnetic field. The device further includes a phase changing unit configured to change a phase of at least one of the resonators to form the magnetic field in the determined shape.

Abstract: A wireless switch is provided. The wireless switch comprises a mechanical switch, an electronic switch module, a charger module, a power storage module, and a wireless control module. The electronic switch module is connected to the mechanical switch in parallel. When one of the mechanical switch and the electronic switch module is turned on, the power storage module is charged through the charger module.

Abstract: Electrochromic windows powered by wireless power transmission are described, particularly, the combination of low-defectivity, highly-reliable solid state electrochromic windows with wireless power transmission. Wireless power transmission networks which incorporate electrochromic windows are described.

Abstract: A wireless power transmission system is presented. In some embodiments, a transmission unit includes a first inductor with a center tap, a first end tap, and a second end tap; a pre-regulator coupled to provide current to the center tap; a switching circuit coupled to the first end tap and the second end tap, the switching circuit alternately coupling the first end tap and the second end tap to ground at a frequency; and a resonant circuit magnetically coupled to the first inductor, the resonant circuit wirelessly transmitting power. In some embodiments, the switching circuit can be formed of FETs. The current provided to the center tap can be controlled in response to current sensors.

Abstract: A wireless power transmission system using multiple coils comprises a transmitter; and a receiver, wherein the transmitter includes a module for receiving a predetermined voltage, and a primary coil for generating a primary resonance frequency in accordance with the received voltage. The receiver spaced apart from the transmitter includes a load for emitting light, capacitors connected in series or in parallel in accordance with an equivalent resistance of the load, and a secondary coil for generating a secondary resonance frequency greater than the primary resonance frequency.

Abstract: An energy harvesting device for a transport vehicle comprising an electric converter circuit and a power take-off unit is disclosed. The electric converter circuit comprises: an electric energy storage; a first DC bus; an electric generator connected to the first DC bus through an electronic brake controller; a second DC bus connected to the first DC bus through a DC/DC converter, and an inverter connected to the second DC bus and having an output connected to the electrical load of the energy harvesting device. The power take-off unit comprises: a rotatable pivot plate for coupling to the vehicle chassis and supporting the electric generator; an electric generator pulley coupled to the electric generator; a shaft pulley; a shaft attachment for attaching the shaft pulley to the vehicle driveline shaft; and a belt connecting the electric generator pulley and the shaft pulley.

Abstract: A load control device for controlling power delivered from an AC power source to an electrical device may be configured to conduct current through earth ground and may disconnect a switching circuit to reduce an amount of current conducted through the earth ground. The load control device may comprise a controllably conductive device configured to control the power delivered from the AC power source to the electrical device so as to generate a switched-hot voltage, a switching circuit electrically coupled with a detect circuit, and a control circuit configured to render the switching circuit conductive and nonconductive. The detect circuit may generate a detect signal indicating a magnitude of the switched-hot voltage. The control circuit may be configured to monitor the detect signal and to render the switching circuit non-conductive after detecting an edge on the detect signal to reduce the total current through the earth ground.

Abstract: A semiconductor device includes a first circuit unit, comprising a first buffer, a second buffer, and a first processing unit, connected to a first power supply system, and a second circuit unit, comprising a third buffer, connected to a second power supply system different from the first power supply system. The semiconductor device includes a first oscillation signal generating circuit connected to the first power supply system, and a second oscillation signal generating circuit connected to the second power supply system. A first oscillation signal generated by the first oscillation signal generating circuit is input to the first buffer. A second oscillation signal generated by the second oscillation signal generating circuit is input to the second buffer through the third buffer. The first buffer selectively outputs the input first oscillation signal and the second buffer selectively outputs the input second oscillation signal based on a value of a control signal.

Abstract: A data center power system includes an enclosure that defines an inner volume; a first direct current (DC) power bus mounted in the inner volume and extending externally to electrically couple to a source of main power; a second DC power bus mounted in the inner volume and extending externally to electrically couple to the source of main power; a plurality of transfer switches mounted in the inner volume, each transfer switch electrically coupled to one of the first DC power bus or the second DC power bus; and a plurality of DC power conductors that are electrically coupled to a pair of transfer switches that includes one transfer switch electrically coupled to the first DC power bus and one transfer switch electrically coupled to the second DC power bus; each DC power conductor configured to electrically couple to a data center rack that supports a plurality of electronic devices.

Abstract: A power control system includes a first inverter power control system and a second inverter power control system coupled in a parallel configuration with the first inverter power control system. Both first and second inverter power control systems may each include an input configured to receive direct current (DC) power; a DC to alternating current (AC) inverter stage configured to receive the DC power input; an anti-islanding relay coupled to the output of the DC/AC inverter stage; and a transition relay coupled to the anti-islanding relay. The transition relay may be configured to route an output of the inverter power control system between one or more onsite back-up loads and an AC grid. The first inverter power control system may be designated as a master that is configured to control the operation of the second inverter power control system designated as a slave.

Abstract: A voltage control system includes a first voltage converter, a second voltage converter and a voltage monitoring module. The first voltage converter is coupled to a first power source and configured to convert first electrical energy of the first power source into a first output voltage. The second voltage converter is coupled to a second power source and configured to convert second electrical energy of the second power source into a second output voltage. The voltage monitoring module is coupled to the first voltage converter and the second voltage converter. The voltage monitoring module is configured to regulate the first output voltage or the second output voltage by controlling the first voltage converter and the second voltage converter according to the first output voltage and the second output voltage.

Abstract: A device for a motor vehicle, includes a housing, in which electrical components are arranged, which are supplied with electrical energy across at least one electrical power supply line, which is arranged inside the housing. The housing has at least one impact switch. In the event that a mechanical force acts on the at least one impact switch in excess of a threshold value, the housing is deformed at a position of the at least one impact switch.

Abstract: A power receiver which wirelessly receives power from at least one power source using one of magnetic field resonance and electric field resonance, including a power receiver coil, an internal circuit, a power detection resistor, a switch, a power reception control unit, and a communication circuit unit. The power receiver coil wirelessly receives the power from the power source, and the internal circuit uses the power obtained by the power receiver coil. The power detection resistor detects the power obtained by the power receiver coil, and the switch applies a received power voltage obtained by the power receiver coil by switching to the power detection resistor. The power reception control unit controls the power detection resistor and the switch, and the communication circuit unit performs communication with the power source, comprising detection information of a received power and power supply timing information.

Abstract: A current regulation system includes a current regulation module and a current distribution module. The current regulation module is coupled to a first power source and a second power source. The current regulation module is configured to derive a first current from the first power source, and derive a second current from the second power source when coupled to a load. The current distribution module is coupled to the first power source, the second power source and the current regulation module. The current distribution module makes the current regulation module regulate the first current and the second current according to a first electric quantity of the first power source and second electric quantity of the second power source.

Abstract: A control method for a power transmitting device is provided, the power transmitting device including a power transmitting antenna, which transmits AC power wirelessly to the power receiving antenna of a power receiving device, and an oscillator. The method includes supplying pulse signals that control first and second switching element groups to the oscillator, and changing a phase shift amount between a first pulse signal and a second pulse signal. The method also includes causing the oscillator to change the voltage of the AC power output and to set an initial value of the phase shift amount. The method further includes causing the oscillator to output preliminary AC power of a voltage to reduce the phase shift amount from the initial value, fixing the phase shift amount, and causing the oscillator to output the AC power while maintaining the voltage corresponding to the fixed phase shift amount.

Abstract: A method of controlling a low-voltage DC-DC converter for a hybrid vehicle is provided. The method includes determining whether an intelligent battery system fails and analyzing a failure cause of the intelligent battery system when the intelligent battery system is determined to fail. A first voltage is deduced using a battery temperature when the failure cause is determined to be a detection failure of battery SOC and an output voltage of a low-voltage DC-DC converter is adjusted to be the first voltage.