Abstract: A wireless power receiving device includes a receiving coil that receives AC power through an AC magnetic field, a rectification circuit that converts the AC power received by the receiving coil into DC power and outputs the obtained DC power to a load, a filter circuit provided between the rectification circuit and the load, an input voltage detection circuit that detects the input voltage of the filter circuit, an output voltage detection circuit that detects the output voltage of the filter circuit, a target voltage generation circuit that generates a second target voltage that is a target value of the input voltage based on the output voltage and a first target voltage that is a target value of the output voltage, and a receiving-side transmitter that transmits difference information indicating the difference between the input voltage and the second target voltage to the wireless power transmitting device.

Abstract: A wireless power receiver is provided with a power reception unit, a rectifier circuit including first to fourth diodes and first and second capacitors and converting AC power into DC, an anode of the first diode and a cathode of the second diode being connected to one output end of the power reception unit, an anode of the third diode and a cathode of the fourth diode being connected to the other output end thereof, and first and second capacitors being connected in parallel, respectively, to the third and fourth diodes, a protection circuit including a first switching element connected between the other output end of the power reception unit and an output end of the rectifier circuit, and a control circuit that controls the first switching element based on output voltage of the rectifier circuit and inter-terminal voltage of the first or second capacitor.

Abstract: A switching control circuit for controlling a multi-channel switching circuit having switching circuits, input terminals coupled to input voltage signals, and an output terminal for providing an output voltage signal, can include: a logic control circuit configured to receive an external operation signal and a first single pulse signal, and to generate an enable signal, a trigger signal, and feedback control signals; a reference voltage regulation circuit configured to receive the enable signal, the trigger signal, and a maximum one of the input voltage signals, and to generate a reference voltage signal; and feedback circuits corresponding to the switching circuits, where the plurality of feedback circuits are configured to receive the feedback control signals, a minimum one of two input voltage signals that are participating in the switching operation, the reference voltage signal, and the output voltage signal, and to generate switching control signals for controlling the switching circuits.

Abstract: A power transmission apparatus that supplies power in a non-contact manner to a plurality of power reception apparatuses, acquires movement information regarding the power reception apparatuses, and controls, in accordance with the movement information, power transmission processing and adjustment processing for adjusting a direction in which the power is transmitted. The power transmission apparatus performs control such that, in a case of transmitting power to a moving power reception apparatus, the adjustment processing is performed before the power transmission processing is performed, and in a case of transmitting power to a stationary power reception apparatus, the adjustment processing is performed before the power transmission processing is performed, and thereafter the power transmission processing is performed without performing the adjustment processing until the stationary power reception apparatus changes to a moving state.

Abstract: A bicycle controller and a bicycle control system are provided that effectively supply power from one battery to a plurality of bicycle components. The bicycle controller includes an electronic control unit that controls power consumed by a plurality of bicycle components. The power is supplied from a common battery. The bicycle components include at least a first component and a second component. In a case where a charge amount of the battery is a first level, the electronic control unit reduces the power of the battery consumed by the first component. In a case where the charge amount of the battery is a second level that is lower than the first level, the electronic control unit reduces the power of the battery consumed by the second component.

Abstract: A non-contact power transmission apparatus accurately determines the kind of object that is placed on the charging deck of the non-contact power transmission apparatus, and, only when a non-contact power receiving apparatus is placed on the power transmission apparatus, allows power transmission and data communication to take place, thereby accurately determining the state of the receiver side and efficiently controlling the transmission of power. In the power transmission apparatus, the power supplied to the non-contact power receiving apparatus is measured, and the output power of the wireless power signal output from two different cores is controlled, thereby allowing the charging operation to be stably conducted even if the non-contact power receiving apparatus is moved anywhere on the power transmission apparatus.

Abstract: Methods, systems, and devices for wirelessly providing power to devices using a non-resonant power receiver are disclosed. A transmitter-side inductor may be inductively coupled to a receiver-side inductor. The transmitter-side inductor and one or more transmitter-side matching capacitors may be included in a power transmitter. The receiver-side inductor may be included in a power receiver. The power receiver may not include a receiver-side matching capacitor. Power from the power transmitter may be provided to the power receiver via the inductive coupling between the transmitter-side inductor and the receiver-side inductor. The power receiver may provide a reflected impedance including a real part and an imaginary part to the power transmitter. The transmitter-side matching capacitor(s) may compensate for the imaginary part of the reflected impedance.

Abstract: Roaming electronic devices (4) are recharged on a flat recharging surface provided with wide contact zones, by using an adapter (3) which defines two electrically conductive terminals (B1, B2) of small section in an outer face (F2) of a strip of the adapter. For each device to be powered, provision is made:—to stick an inner face of the strip (B) against a face (6) of the device and engage a connector (20) in the device on the side of a bent part (21) of the strip;—to place the adapter between the device and the recharging surface to allow conduction from two of the contact zones, the terminals being spaced apart by a predetermined distance (c) very much greater than their section size; and to selectively supply contact zones with current, for these zones on which the two terminals bear to be in an operational state and allow the recharging via the adapter.

Abstract: A power reception coil is a circular coil having a hollow portion formed in a center portion of the power reception coil in a radial direction. The power reception coil, a resonant capacitor, and a magnetic member are arranged in a power reception coil unit forming a contactless power reception device. The power reception coil unit is attached to a member element serving as a frame member of a vehicle body. A hollow portion corresponding region which is a portion of the power reception coil unit corresponding to the hollow portion of the power reception coil is in contact with the member element.

Abstract: A device for detecting an electrical load connected to an electric power supply network. The device comprises means for injecting a test signal into the electrical network and means for identifying the presence and the nature of an electrical load connected to the electrical network on the basis of the test signal.

Abstract: In a wireless charging system, a power-transmitting node (TX), has a processor, a memory, a power transmitter for transmitting power wirelessly to a power-receiving node (RX), and a signal receiver for receiving signals from the RX. After the processor detects the presence of a foreign object (FO) during a power-transfer session, the processor places the TX in a protection state. The processor detects whether the FO has been removed using quality factor (QF) values for the TX that the processor measures before and after detecting the presence of the FO, and without requiring any QF values calibrated off-line. The QF values include a QF value measured before the FO is present, a QF value measured just after the TX enters the protection state, and a current QF value that is repeatedly updated as long as the TX remains in the protection state.

Abstract: Systems and methods are described for transmitting and receiving wireless power. In some embodiments, a wireless power transmission system comprises an antenna array comprising a plurality of antennas and a transceiver module configured to receive a plurality of beaconing signals via the antenna array from a wireless client during a beacon cycle. The system also comprises a controller configured to measure a phase of each of the plurality of beaconing signals and determine a transmit phase configuration for each of the antennas, and a transceiver module configured to send signals to the antenna array based on the transmit phase configuration for delivery of wireless power to the wireless client.

Abstract: A connection module for an electrical energy storage device of a motor vehicle includes a first connection element and a second connection element for connecting to the electrical energy storage device and to a traction network. The connection module includes busbars which connect the first connection element and the second connection element to one another. The connection module further includes a primary current measurement element and a secondary current measurement element, wherein the secondary current measurement element operates contactlessly. A power supply system for a motor vehicle is also provided.

Abstract: An aircraft comprises a fuselage, a set of electrical equipment items distributed in the fuselage, and a hybrid electrical power distribution and data communication network. The latter comprises a set of buses comprising at least one electrical power distribution bus extending, at least partly, in a longitudinal direction of the fuselage. A set of data links is associated with each bus of the set of buses. The bus and the associated set of data links each comprise connection points at different locations distributed along their length, forming pairs of connection points. Each of the electrical equipment items of the set of electrical equipment items is linked to a pair of connection points via a local electrical power supply link and/or via a local data link.

Abstract: A resonance contactless power supply device can include: (i) a converter configured to convert an input power signal to an adjustable DC voltage; (ii) an inverter configured to receive the adjustable DC voltage, and to generate an AC voltage with a leakage inductance resonance frequency; (iii) a first resonance circuit having a transmitting coil, and being configured to receive the AC voltage from the inverter; (iv) a second resonance circuit comprising a receiving coil that is contactlessly coupled to the transmitting coil, where the second resonance circuit is configured to receive electric energy from the transmitting coil; and (v) a control circuit configured to control the adjustable DC voltage according to a phase difference between the AC voltage and an AC current output by the inverter, such that the phase difference is maintained as a predetermined angle.

Abstract: A wireless power receiver includes one or more tunable capacitors in parallel with an inductor. The wireless power receiver adapted to receive an induced voltage input at the inductor due to a magnetic field generated by a wireless power transmitter. The rectifier has an output with a rectified voltage and a rectified current. A controller has a first input for receiving a signal representative of the rectified voltage and a first output for supplying an adjustment signal to the tunable capacitor. The controller includes a processor coupled to the first input and is configured to operate on the signal representative of rectified voltage to produce a desired capacitance value for capacitor and provide the adjustment signal determined so as to adjust a capacitance value of capacitor to the desired capacitance value.

Abstract: A power transmission device transmits power underwater to a power reception device including a power reception coil. The power transmission device includes: a power transmission coil that transmits power to the power reception coil through a magnetic field; a power transmitter that transmits an alternating current power having a predetermined frequency to the power transmission coil; and a first capacitor that is connected to the power transmission coil and forms a resonance circuit resonating with the power transmission coil. The predetermined frequency is a frequency between a first frequency at which a geometric mean value of a Q value of the power transmission coil and a Q value of the power reception coil are the maximum and a second frequency at which the Q value of the power transmission coil and the Q value of the power reception coil are the same.

Abstract: A circuit breaker for interrupting a direct current, in particular in a power supply system in a vehicle having a main current path that includes a switch, and having a reed relay for detecting an electric current flow across the main current path. The switch is coupled to the reed relay. Also, a use of a circuit breaker is provided.

Abstract: Self-powered switches include a switch housing having an externally accessible user input member, a coil assembly, and a magnet arranged therein such that at least one of the coil assembly and the magnet move relative to each other responsive to movement of the user input member between first and second switch positions, and a control circuit held in the switch housing and coupled to first and second terminals of the coil assembly. The control circuit is configured to detect respective electrical characteristics of the first and second terminals of the coil assembly responsive to the movement of the user input member, and selectively transmit first and second wireless control signals to a remote receiver based on the respective electrical characteristics of the first and second terminals of the coil assembly, respectively. Related circuits and methods of operation are also discussed.

Abstract: A vehicle power supply apparatus includes a motor generator, a first electricity storage, a second electricity storage, a first switch, a second switch, a switch controller, and an electricity storage determiner. The first and second electricity storages are able to be coupled to the motor generator that is coupled to an engine. The first switch and the second switch each switch from electric conduction between the motor generator and corresponding one of the first and second electricity storages to cutoff between the motor generator and corresponding one of the first and second electricity storages and vice versa. The switch controller controls the first switch and the second switch. The electricity storage determiner determines an abnormality of the first electricity storage. The switch controller controls each of the first switch and the second switch into an electrically-conductive state when the first electricity storage is determined as being in an abnormal state.