Abstract: The present invention discloses a method and device for formulating a coordinated action strategy of SSTS and DVR for voltage sag mitigation. The influence of voltage sag on a whole industrial process of a sensitive user is analyzed, and the sensitive loads of SSTS and DVR which satisfy a governance need are grouped; a practical governance scenario of installing a plurality of DVR is considered to install a minimum-capacity DVR to realize a target of a minimum interruption probability of the whole industrial process of the user; an optimal coordinated governance solution of SSTS and DVR based on sensitive load grouping is proposed; a classification result is obtained for duration time at a time when a voltage sag event occurs through a decision tree constructed based on historical data.

Abstract: An apparatus and a method for controlling the power transfer coverage of a wireless power transmission network are disclosed. The method for controlling the power transfer coverage of a wireless power transmission network, which includes a plurality of peripheral devices for receiving power from a main device through a resonant channel within the power transfer coverage of the main device, comprises the steps of: checking a wireless power transmission network disconnection state of any one of the plurality of peripheral devices by a procedure gradually decreasing the amount of transmission power of the main device; and forming the power transfer coverage on the basis of the amount of transmission power at the moment of the wireless power transmission network disconnection.

Abstract: An example method is performed at a near-field charging pad with a processor, a power-transferring element, a signature-signal-receiving circuit, and the processor of the near-field charging pad is in communication with a data source that includes predefined signature signals that each identify one of (i) a wireless power receiver, (ii) an object other than a wireless power receiver, and (iii) a combination of a wireless power receiver and an object other than a wireless power receiver. The method includes: after sending a plurality of test radio frequency (RF) power transmission signals, detecting, using the signature-signal-receiving circuit, respective amounts of reflected power; generating, based on variations in the respective amounts of reflected power, a signature signal; and determining whether (i) an authorized wireless power receiver is present on the near-field charging pad and/or (ii) an object other than a wireless power receiver is present on the near-field charging pad.

Abstract: A wind farm, having a nominal power, for feeding electrical power into a supply network, comprising: wind power installations, a wind farm network and a stabilization unit connected to the wind farm network and arranged between the installations and the supply network. The stabilization unit increases a stability of the wind farm and comprises: an energy storage device which is set up to provide an electrical power, an intermediate circuit which is connected to the storage device and which is set up to conduct at least the electrical power provided by the storage device, an inverter connected to the intermediate circuit and set up to form at least the electrical power provided by the storage device, and a control unit set up to control at least the inverter such that the stabilization unit at the wind farm appears, statically as well as dynamically, like an electromechanical synchronous machine.

Abstract: Disclosed are systems and methods for a power control system for a vehicle having multiple power sources. The power control system may include a plurality of sensors associated with one or more power sources and a microcontroller configured to receive a plurality of signal inputs, wherein the microcontroller selects a power state for the power control system based at least in part on the plurality of signal inputs from the plurality of sensors. The power state may be selected from a group including a first power state, wherein power is provided to a critical power subsystem, an essential power subsystem, and an auxiliary power subsystem, a second power state, wherein power is provided to the critical power subsystem and the essential power subsystem of the vehicle, and a third power state, wherein power is provided only to the critical power subsystem of the vehicle.

Abstract: To provide a semiconductor device with a digital-controlled DC-DC converter capable of stable feedback operation while minimizing area, the semiconductor device includes a DC-DC converter whose characteristic is determined by the control parameter, a flash memory and a processor that controls the flash memory, both of which operate at a power supply based on the output of the DC-DC converter. The control parameter is stored in the flash memory, and the control parameter is read out from the flash memory and set in the DC-DC converter by the processor while the DC-DC converter is operating.

Abstract: A circuit includes a tank capacitor coupled between first and second nodes, and a sense resistor having a first terminal coupled to the first node and a second terminal coupled to a regulator input. A switching circuit has first and second inputs coupled to the first and second terminals of the sense resistor. A gain stage has first and second inputs capacitively coupled to first and second outputs of the switching circuit. An analog-to-digital converter receives the output of the gain stage, and receives first and second differential voltages. A reference voltage generator has a temperature independent current source coupled to source current to a reference resistor, the first differential reference voltage being formed across the reference resistor. The reference resistor and sense resistor are located sufficiently close to one another on a single common substrate such that they remain at substantially a same temperature.

Abstract: A method for controlling power flow between a renewable energy plant and an electric power grid, the plant having an intermittent energy source, the method comprising: using a control system, measuring power output from the plant and determining a first difference between the measured power output from the plant and a power reference; measuring frequency deviation of the power output from the plant and determining a second difference between the measured frequency deviation and a frequency deviation reference; generating a first error by limiting a sum of the first and second differences between predetermined minimum and maximum power error limits; modelling power output from the source and determining a second error between the modelled power output from the source and a control signal applied to the source to control the power output therefrom; and, generating the control signal by applying the first and second errors to a PI loop.

Abstract: Apparatuses and systems enable power transfer from one or more energy sources to one or more loads. The input power from the energy sources may be unregulated, and the output power to the loads is managed. The power transfer is based on a dynamic implementation of Jacobi's Law (also known as the Maximum Power Theorem). In some embodiments, the energy sources are selectively coupled and decoupled from the power transfer circuitry. In some embodiments, the loads are selectively coupled and decoupled from the power transfer circuitry. Power transfer to the loads is dynamically controlled.

Abstract: A vehicle may include a driving motor supplying driving force to vehicle wheel; a power converter using a coil provided in the driving motor to transform power input from the external power source; a battery charged according to counter electromotive force of the driving motor in a regenerative braking mode, charged according to the power transformed by the power converter in a charging mode, and supplying driving power to the driving motor in a driving mode; an oil pump supplying oil to the driving motor; a detector detecting temperature of the oil; and a controller controlling the oil pump to be operated in a warm-up mode when the oil temperature detected by the detector is less than a first threshold temperature and the battery is in the charging mode, and applying reference power to the oil pump to move the oil to the driving motor in the warm-up mode.

Abstract: A system for wireless power transfer control comprising a receiver for receiving and consuming power, a transmitter for transmitting power, wherein the receiver is configured to generate and send a message to the transmitter, the transmitter is configured to control an output level transmitted to the receiver based on the message, and wherein the receiver or the transmitter is configured to perform a corrective action if a magnitude of the message exceeds a power error threshold for a threshold time.

Abstract: Methods and apparatus to use a switched-mode power supply as a source of power in a service pack are disclosed. An example power system includes: an engine; a generator configured to generate electrical power from mechanical power delivered by the engine; a switched-mode power supply configured to convert the electrical power from the generator to output power; and control circuitry configured to: when an output load of the switched-mode power supply is a power system load, control the switched-mode power supply to provide the output power for output to the power system load; and when the output load of the switched-mode power supply is a vehicle load, control the switched-mode power supply to provide the output power for output to a vehicle electrical system connected to a vehicle energy storage device.

Abstract: An input power supply selection circuit includes a load, at least one input power supply to provide an operation power supply for the load, an input selection circuit to select the at least one input power supply as the operation power supply for the load, a sensing and control module to control the input selection circuit to switch the operation power supply for the load, and a load switch branch to control the load to be connected or disconnected. The sensing and control module controls the load switch branch to be connected or disconnected, and when the load switch branch is disconnected, the load and the at least one input power supply are not electrically coupled. Therefore, a contact protection design is simplified and a switching capacity requirement of the load switch branch is lowered.

Abstract: A method and system for distributed power generation is provided. The method includes determining an operational cycle for the system; determining an average energy requirement of the system based on the operational cycle; configuring a plurality of energy sources each corresponding to the load device to produce a peak efficiency corresponding to the average energy requirement of the system; and coupling the energy source to provide energy to the load device.

Abstract: The disclosure relates to an inverter with at least one inverter bridge and at least two DC converters, the outputs of the DC converters being connected to inputs of the inverter. The inverter includes an exchangeable adapter having input terminals for connection to power sources or loads and output terminals connected via input terminals to inputs of the DC-DC converters. Within the adapter each of the output terminals is connected to one of the input terminals and/or another of the output terminals.

Abstract: Provided herein is a magnetic sheet. The magnetic sheet according to one embodiment of the present invention includes a magnetic layer formed of crushed pieces of a magnetic body to improve flexibility of the magnetic sheet, and a thin film coating layer formed on at least one surface of the magnetic layer to maintain the magnetic layer in a sheet shape and buffer an external force applied to the crushed pieces of the magnetic body.

Abstract: To minimize excessively high output or increases in magnetic-flux leakage by controlling power feeding on the power-feeding side if an unforeseen situation occurs. This power-feeding device (100) feeds power to an external power-receiving device (150) in a contactless manner. A power-feeding coil (103) uses electromagnetic power to feed electrical power to a power-receiving coil (154) in the power-receiving device (150). While power is being fed from said power-feeding coil (103), a power-feeding-side control unit (107) determines the amount of displacement of the power-feeding coil (103) and, on the basis of the determined displacement amount, controls the amount of electrical power being fed.

Abstract: An example method is performed at a near-field charging pad that includes a wireless communication component, and a plurality of power-transfer zones that each respectively include at least one power-transferring element and a signature-signal receiving circuit. The method includes: sending, by a respective power-transferring element included in a first power-transfer zone of the plurality of power-transfer zones, test power transmission signals with first values for a set of transmission characteristics. The method also includes: in conjunction with sending each of the power transmission signals: detecting, using the signature-signal receiving circuit, respective amounts of reflected power at the first power-transfer zone.

Abstract: A power transmission apparatus transmitting power to a power reception apparatus and communicating with the power reception apparatus by applying a communication method which allows communication in a wider communication range than a power transmittable range includes a reception unit which receives a notification signal for notifying the existence of a power reception apparatus by applying the communication method, an instruction unit which instructs a power reception apparatus having transmitted the notification signal to change a load impedance consuming received power, a determination unit which determines that the source power reception apparatus has changed the load impedance in accordance with the instruction, and a wireless power transfer unit which wirelessly transfers power to the power reception apparatus if the determination unit determines that the source power reception apparatus has changed the load impedance in accordance with the instruction.

Abstract: An off-grid energy storage system includes n energy storage inverters identified by P1, P2, . . . , Pn sequentially, direct current sides of the inverters are connected to storage batteries, and alternate current sides of the inverters are connected in parallel. The storage battery connected to the direct current side of Pj is identified by Bj, where j=2, 3, . . . , n. A control system for an output waveform of P1 has a voltage-current double loop control structure, and a control system for an output waveform of Pj has a current loop control structure. A current loop given value of Pj is obtained by adding a current correction value of Pj to a current loop given value of P1. The current correction value of Pj is used for causing Bj to have the same operating parameter as B1.

Abstract: This invention discloses a power electronic converter that has a common reference point for the measurement of voltages and currents, making it possible to use non-isolated or isolated voltage and current sensors. The disclosed converter has an N-type power electronic conversion leg that consists of two sets of power electronic devices with their both ends connected to a capacitor to form a DC bus and their mid-point connected to the common reference point through an inductor and a current sensor. The disclosed converter has one or more power electronic conversion leg that consists of two sets of power electronic devices with the positive end connected to the positive rail of the DC bus and the negative end connected either to the common reference point N, in which case the power electronic conversion leg is denoted the A-type, or to the negative rail of the DC bus, in which case the power electronic conversion leg is denoted the B-type.

Abstract: A power converter includes an AC power input line, an AC power output line, a neutral line, a first capacitor connected to the AC power input line and the neutral line, a first inductor connected to the AC power input line, a first bus, a second bus, a second capacitor connected to the first bus and the second bus, a first half-bridge circuit connected to the first bus, the second bus and the first inductor, a second half-bridge circuit connected in series with the first half-bridge circuit and connected to the AC power output line, a third half-bridge circuit connected in series with the first half-bridge circuit, a second inductor connected to the third half-bridge circuit and the neutral line, and a controller.

Abstract: Disclosed is a non-contact power supply system wherein power is transmitted by means of a magnetic field resonance method from a power transmission device, which includes a power transmission-side resonant circuit, to a power reception device, which includes a power reception-side resonant circuit. The power transmission device detects, at the time of transmitting the power, a load in the power transmission, and stops the power transmission in the cases where a detection result deviates from a specified normal range. In the power reception device, a power stabilization circuit (270) that maintains output power of the power reception circuit constant is provided between a load circuit (280) and a power reception circuit (230) that outputs, toward the load circuit, power on the basis of power received by the power reception-side resonant circuit.

Abstract: Described is a circuit for supplying power to an electric load connected to the circuit via an interface, and for receiving desired signals transmitted from the electric load by an amplitude modulation, performed by the electric load, of a carrier signal transmitted from the circuit via the interface, said carrier signal serving to supply power to the electric load, with a carrier signal generator that comprises a direct voltage source and a DC-AC converter downstream of the direct voltage source, and with a demodulator for extraction of desired signals modulated by the electric load on the carrier signal, which circuit has a high efficiency without the use of choke coils. The demodulator is designed to extract the desired signals using a current corresponding to a carrier signal current flowing through a current path of the circuit during a transmission of the desired signals, said carrier signal current flowing across the interface.

Abstract: An electro-mechanical kinetic energy storage device includes an input port, an output port, and a tertiary port separate from and magnetically coupled to the input port and the output port. The input port is configured to receive a first input electrical energy from a first electrical source for inducing mechanical energy into the electro-mechanical kinetic energy storage device. The output port is configured output a first converted electrical energy to a first load in which the outputted electrical energy is generated from the induced mechanical energy. The tertiary port is configured to receive a second input electrical energy from a second electrical source for inducing the mechanical energy, and output a second converted electrical energy to a second load, the second converted electrical energy generated from the induced mechanical energy.

Abstract: Aspects of the present invention relate to an apparatus and method for detecting foreign objects in a wireless power transmission system. This specification provides a wireless power reception apparatus for detecting foreign objects, including a power measurement unit for generating required power information indicative of required power for the wireless power reception apparatus, sending the required power information to a wireless power transmission apparatus, and measuring power induced from the wireless power transmission apparatus and a secondary coil for receiving the power induced from the wireless power transmission apparatus. In accordance with the present invention, foreign objects intervened between the wireless power transmission apparatus and the wireless power reception apparatus are recognized, and a user removes the foreign objects. Accordingly, damage to a device attributable to foreign objects can be prevented.

Abstract: A wireless power receiver (PRU) and a method for generating a load of the PRU for detecting the PRU in a wireless charging system are provided. The method includes receiving a wireless power signal from a wireless power transmitter (PTU), rectifying the received wireless power signal into a direct current (DC) signal, and generating a load for detecting the PRU by controlling a current flowing across a resistor connected in parallel with a load charged with power of the DC signal.

Abstract: An electronic apparatus includes an antenna that wirelessly receives power; a power control unit that accumulates or supplies power received by the antenna by inputting power; a communication unit that communicates with a power supply apparatus via the antenna; a switching unit that switches between a path from the antenna to the power control unit and a path from the antenna to the communication unit; and a driving unit that operates with power received by the antenna and drive the switching unit, wherein an input impedance of the driving unit viewed from the antenna is higher than an input impedance of the power control unit viewed from the antenna or an input impedance of the communication unit viewed from the antenna.

Abstract: Embodiments disclosed herein describe a wireless power receiving system for an electronic device includes: a first inductor coil configured to receive power primarily at a first frequency and from magnetic fields propagating in a first direction; and a second inductor coil configured to receive power primarily at a second frequency and from magnetic fields propagating in a second direction, wherein the first frequency is different than the second frequency.

Abstract: A power receiver includes: a secondary-side resonant coil including a resonant coil part to receive electric power from a primary-side resonant coil through magnetic field resonance; a capacitor inserted in series in the resonant coil part; a series circuit of a first switch and a second switch; a first rectifier having a first rectification direction; a second rectifier having a second rectification direction; a detector to detect a voltage waveform or a current waveform of the power; and a controller to adjust, in a state of adjusting a phase difference between the waveform and a driving signal that includes a first signal for switching on/off the first switch and a second signal for switching on/off the second switch to be a predetermined phase difference, a length of a period, during which the switches are both on, to adjust an amount of the power received by the secondary-side resonant coil.

Abstract: An uninterruptible power supply apparatus includes a converter (5) configured to convert AC power into DC power, and an inverter (10) configured to convert DC power into AC power and supply the converted power to a load (24). The load (24) is configured to receive an AC voltage within a range of allowable input voltage to consume constant AC power. The uninterruptible power supply apparatus has maximum efficiency ? when a ratio of load capacity to rated capacity of the uninterruptible power supply apparatus is a predetermined value ?. The uninterruptible power supply apparatus further includes a control device (18) configured to control an output voltage of the inverter (10) within the range of allowable input voltage so as to increase the efficiency ?, when the ratio of the load capacity to the rated capacity is different from the predetermined value ?.

Abstract: A control device that can perform discharging execution and stop of a power receiving device included in a contactless power transmission, electronic apparatus, contactless power transmission system, and the like. The control device is on a receiving side in a contactless power transmission system including a power transmitting device and a power receiving device, and includes: a charging unit that charges a battery based on power received by a power receiving unit that receives power from the power transmitting device; a discharging unit that performs an operation of discharging the battery; a control unit that controls the discharging unit; and a monitoring unit that monitors the operation state of a switch unit. The control unit causes the discharging unit to discharge when removal of the power receiving device has been detected, and stops the discharging when an off operation of the switch unit has been detected by the monitoring unit.

Abstract: The present invention provides a method and an apparatus for controlling the wireless induction power supply. The apparatus comprises a transmitter control circuit and a receiver control circuit. The method comprises generating a plurality of switching signals for switching a transmitter winding and generating a power; detecting a level of a transmitter signal from the transmitter winding; and controlling a switch to deliver the power from a receiver winding to a load. The receiver winding is coupled to receive the power from the transmitter winding. The switching signals will be disabled if the level of the transmitter signal is not higher than a threshold over a first period or the level of the transmitter signal is higher than a high-threshold over a second period. Accordingly, the method and the apparatus according to the present invention have the foreign object detection (FOD) function for the safety.

Abstract: The present invention provides a method and an apparatus for controlling the wireless induction power supply. The apparatus comprises a transmitter control circuit and a receiver control circuit. The method comprises generating a plurality of switching signals for switching a transmitter winding and generating a power; detecting a level of a transmitter signal from the transmitter winding; and controlling a switch to deliver the power from a receiver winding to a load. The receiver winding is coupled to receive the power from the transmitter winding. The switching signals will be disabled if the level of the transmitter signal is not higher than a threshold over a first period or the level of the transmitter signal is higher than a high-threshold over a second period. Accordingly, the method and the apparatus according to the present invention have the foreign object detection (FOD) function for the safety.

Abstract: If the capacitance of a snubber capacitor, the inductance of a coil and the magnitude of a resistor are specified such that the resonance frequency of the snubber circuit coincides with the ringing frequency of the transistor, and the impedance of the first loop at the resonance frequency becomes smaller than the impedance of the second loop at the resonance frequency, a current component due to ringing flows in the snubber circuit, and energy is consumed by the resistor. Therefore, it is possible to quickly converge ringing.

Abstract: The present disclosure provides a household photovoltaic system and a smart micro-grid system. The household photovoltaic system includes a photovoltaic assembly module, a household photovoltaic inverter and an AC grid. The household photovoltaic system further includes a monitoring assembly and a wireless communication assembly. The monitoring assembly includes DC-side monitoring assemblies each configured to monitor an operating parameter of an output end of the photovoltaic assembly module, and AC-side monitoring assemblies each configured to monitor an operating parameter of an output end of the household photovoltaic inverter. The wireless communication assembly includes a DC-side wireless communication assembly and an AC-side wireless communication assembly which are configured to transmit the operating parameters monitored by each DC-side monitoring assembly and each AC-side monitoring assembly to a predetermined monitoring terminal.

Abstract: A system includes a circuit interruption device, such as a circuit breaker, contactor or other switch of an automatic transfer switch (ATS) or a similar device providing power to an input of an ATS, and a monitoring circuit, such as a controller of the ATS, coupled to the circuit interruption device and configured to monitor voltages at inputs and outputs of the circuit interruption device, to monitor an auxiliary contact signal associated with auxiliary contacts of the circuit interruption device, and to determine a status of the auxiliary contacts responsive to the monitored voltages and auxiliary contact signal.

Abstract: An electric drive system includes bus rails carrying a bus voltage, an energy storage system (ESS), and a power inverter. The system includes a voltage converter connected to the bus rails and having an inductor coil, semiconductor switches, a bypass switch connected to a positive bus rail, and a capacitor. A polyphase electric machine is electrically connected to the power inverter. A controller executes a method in which operation of the converter is regulated based on power, torque, and speed values of the electric machine. The converter is selectively bypassed by closing the bypass switch under predetermined high-power/high-torque conditions, with the bus voltage adjusted until it is equal to the battery output voltage. The bypass switch is opened and the bus voltage thereafter regulated to a predetermined voltage.

Abstract: The present specification which relates to a wireless power transmission device and a control method, capable of transmitting and receiving power wirelessly comprises a power supply unit for supplying power to a receiving device to transmit power wirelessly; and a power transmission control unit for, periodically generating a waveform with a particular frequency, measuring an attenuation coefficient of the waveform at each cycle, measuring a variation in the attenuation coefficient at each cycle, and determining the type of an external material. The present invention has a technical feature wherein the power transmission control unit determines whether to transmit power wirelessly to the receiving device on the basis of the type of the external material.

Abstract: A wireless power delivery system includes a wireless power source and a control module. The wireless power source provides power to an information handling system. The control module is in communication with the wireless power source, and is configured to detect a presence signal from the information handling system, to set an output power level for the information handling system based on the presence signal, to receive a signal from the information handling system, and to adjust the output power level based on the signal.

Abstract: A drive circuit comprising a DC bus configured to supply power to a load, a first fuel cell coupled to the DC bus and configured to provide a first power output to the DC bus, and a second fuel cell coupled to the DC bus and configured to provide a second power output to the DC bus supplemental to the first fuel cell. The drive circuit further includes an energy storage device coupled to the DC bus and configured to receive energy from the DC bus when a combined output of the first and second fuel cells is greater than a power demand from a load, and provide energy to the DC bus when the combined output of the first and second fuel cells is less than the power demand from the load.

Abstract: An energy storage device includes a battery with at least one battery cell and two poles, two connection points each connected to battery pole, for connecting to an external current circuit for charging and discharging the battery, a battery charge state monitoring device, an additional energy storage element different than the battery cell, a connection circuit for connecting the additional energy storage element to at least one battery pole, and at least one connection point. The connection circuit is designed such that a specified energy storage element current having a specified relationship with the total current flowing through the energy storage device is charged into and/or discharged from the energy storage element. A voltage measuring device contacts the additional energy storage element to measure an energy storage voltage, and the charge state monitoring device determines the charge state of the battery based at least on the energy storage voltage.

Abstract: An uninterruptible power system is provided. When a first power supply of the system is faulty, in a process in which a switch unit switches power supply from the first power supply to a second power supply, the second power supply discharges to a direct current bus using a bidirectional power converter, electric energy stored in the direct current bus is also discharged in a short time in a process of the switch, and the direct current bus outputs both a discharging current of the second power supply and a discharging current of the direct current bus to a system output end, which ensures that the direct current bus outputs a stable voltage in a gap period of an action of the switch unit.

Abstract: An electrical grid control system includes a plurality of power conversion apparatuses each storing active power relationship information indicating a relationship between an active power control level representing a level of control for active power output to an electrical grid, and a connection point frequency being a frequency at a connection point to the electrical grid; and a control apparatus that repeatedly receives information indicating a system frequency measured in the electrical grid, determines the active power control level based on the system frequency, and transmits the active power control level to the plurality of power conversion apparatuses. Each power conversion apparatus repeatedly measures the connection point frequency, receives the active power control level from the control apparatus, and controls the active power based on the measured connection point frequency, the received active power control level, and the active power relationship information.

Abstract: A vehicle powertrain includes a bypass diode and a controller. The bypass diode is configured to clamp an inverter DC terminal voltage to a battery voltage. The controller is configured to, while the terminal voltage is within a predetermined range of the battery voltage, maintain off a lower IGBT of a DC-DC converter while in a propulsion mode, and modulate the lower IGBT to increase the terminal voltage to maintain the bypass diode reverse biased while in a regenerative mode.

Abstract: Methods and apparatus for detecting the presence of undesirable foreign matter in a region between a wireless power transmission apparatus and a power reception apparatus are described. First and second detection methods, based on different detection schemes, may be used to detect and distinguish the presence of foreign matter from misalignment during power transfer operation method may be used while power is supplied to the load.

Abstract: A power feeding apparatus is provided. The power feeding apparatus includes a power feeding unit configured to supply electric power to a power receiving apparatus through a magnetic field; a measuring unit configured to measure an electric characteristic value and to generate a measurement value; a power receiving unit configured to provide a set value; and a foreign substance detection unit configured to detect a foreign substance in the magnetic field based on the set value and the measurement value. A power receiving apparatus, a power feeding system, and a method of controlling power feeding are also provided.

Abstract: An AC circuit breaker is provided between an AC system and an AC-DC converter, and a DC circuit breaker is provided between a DC line and the AC-DC converter. A bypass switch capable of short-circuiting a converter cell included in the AC-DC converter is connected to the AC-DC converter. At the time of a fault in the DC line, the bypass switch is turned on to interrupt the supply of DC power from the AC system to the DC line.

Abstract: The invention relates to a system (100) with a battery charging device (20) with output terminals and an vehicle electrical system power supply stage (10). The vehicle electrical system power supply stage has a step-up/step-down converter (12), which is designed to raise an input voltage of the vehicle electrical system power supply stage to an intermediate circuit voltage, a direct current intermediate circuit (13), which is coupled to the step-up/step-down converter (12) at intermediate circuit nodes (14a, 14b), and a vehicle electrical system d.c.-d.c. converter (11), which is coupled to the direct voltage intermediate circuit at the intermediate circuit nodes, and which is designed to convert the intermediate circuit voltage into a direct voltage for a vehicle electrical system (1, 2), the output terminals of the battery charging device (20) being coupled to the direct voltage intermediate circuit (13) via the intermediate circuit nodes (14a, 14b).

Abstract: Aspects of the present invention relate to an apparatus and method for detecting foreign objects in a wireless power transmission system. This specification provides a wireless power reception apparatus for detecting foreign objects, including a power measurement unit for generating required power information indicative of required power for the wireless power reception apparatus, sending the required power information to a wireless power transmission apparatus, and measuring power induced from the wireless power transmission apparatus and a secondary coil for receiving the power induced from the wireless power transmission apparatus. In accordance with the present invention, foreign objects intervened between the wireless power transmission apparatus and the wireless power reception apparatus are recognized, and a user removes the foreign objects. Accordingly, damage to a device attributable to foreign objects can be prevented.