Abstract: A power transfer system comprises a power transmitter (101) wirelessly providing power to a power receiver (105) via an inductive power transfer signal. Communication from power receiver (105) to the power transmitter (101) is by load modulation using the power transfer signal. The communication uses load modulation where each symbol is represented by a chip sequence being a sequence of modulation load values. The power transmitter (101) comprises a first communicator (207) which correlates a chip sequence received from the power receiver with a set of reference chip sequences being linked to data symbol values and determines the data symbol as the data symbol linked to a reference chip sequence for which the highest correlation with the first chip sequence is determined.

Abstract: A method for operating a wireless transmission system includes (i) receiving, as input, direct current (DC) power from a power and data connector that comprises a power input and a bi-directional data connector, (ii) generating a driving signal for driving an antenna of the wireless power transmission system, (iii) generating alternating current (AC) wireless signals based on the input DC power and the driving signal, (iv) propagate AC wireless power signals that are based on the AC wireless signals via the antenna, (v) couple with a wireless receiver system via the AC wireless power signals, (vi) receiving data associated with a peripheral device by decoding in-band data signals from the AC wireless power signals that are encoded by the wireless receiver system, and (vii) providing the data associated with the peripheral device to a client device operatively associated with the wireless transmission system, via the bi-directional data connector.

Abstract: A wireless power receiver comprises: a power pickup circuit for receiving wireless power from a wireless power transmitter on the basis of a magnetic coupling with the wireless power transmitter, and converting an alternating current signal generated by the wireless power into a direct current signal; and a communication/control circuit for communicating with the wireless power transmitter and controlling the wireless power that is received, wherein the communication/control circuit transmits, to the wireless power transmitter, an end power transfer packet for detecting a foreign object in a primary power transfer step of receiving the wireless power so as to enable the wireless power transmitter to detect the foreign object, receives a ping signal from the wireless power transmitter which has estimated that no foreign object is present, and transmits a data packet, in response to the ping signal, for entering a secondary power transfer step.

Abstract: A method in a wireless power transfer system can include transmitting, to a wireless power transmitter during a ping phase, a response signal in response to a digital ping initiated by the wireless power transmitter, and transmitting, to the wireless power transmitter during a configuration phase, a configuration packet including first control information related to whether the wireless power receiver supports an authentication function. Also, the method can further include receiving, from the wireless power transmitter during a negotiation phase, a capability packet including second control information and a potential power value of the wireless power transmitter, in which the second control information is related to whether the wireless power transmitter supports the authentication function, and receiving power from the wireless power transmitter.

Abstract: The present invention relates to a battery management system and a battery pack and the battery management system according to an embodiment of the present invention includes: a pack voltage sampling unit configured to periodically sample a pack voltage of a battery pack; a pack current sampling unit configured to sample a pack current of the battery pack; and a control unit configured to, after starting to sample the pack voltage of the battery pack, when the pack voltage sampling of the battery pack is completed, record a time from a sampling start time of the pack voltage to a sampling completion time of the pack voltage as a first time, and transmit a voltage sampling synchronization signal for measuring a cell voltage of a battery cell to a plurality of lower-level battery management systems, wherein the control unit performs sampling synchronization on the sampled measurement signal between each lower-level battery management system based on a second time, which is a sampling time at which a cell voltag

Abstract: The power transmitter (101) providing power to a power receiver (105) comprises a communicator (309) communicating with the power receiver (105) and a negotiator (305) negotiating a guaranteed power level with the power receiver (105) prior to a power transfer phase. The guaranteed power level is a minimum power level guaranteed by the power transmitter (101) throughout the power transfer phase. During the power transfer phase, a determiner (307) dynamically determines an available power level based on the prevailing operating parameters. The available power level is one that can currently be provided but is not guaranteed. The power controller (309) is arranged to, during the power transfer phase, increase the power level above the guaranteed minimum level in response to power control messages, and to reduce the power level regardless of the power control messages in response to a detection that the power level exceeds the available power level.

Abstract: Detection of an electric current through a diode arranged parallel to a semiconductor switching element. For this purpose, an output signal of a circuit arrangement for saturation monitoring (desat circuit) is used. The output signal is evaluated at periods in which the semiconductor switching element is opened.

Abstract: Provided is a battery system, including a first battery pack including a first battery cell, a second battery pack including a second battery cell, a charger, and at least one processor configured to control the charger to sequentially perform constant current (CC) charging on the second battery pack and the first battery pack based on input power being identified, and control the charger to sequentially perform constant voltage (CV) charging on the second battery pack and the first battery pack based on the CC charging of the second battery pack and the first battery pack being completed, wherein a discharging performance of the first battery pack is greater than a discharging performance of the second battery pack, and wherein a charging performance of the second battery pack is greater than a charging performance of the first battery pack.

Abstract: A power supply system configured to quickly set a phase capable of increasing power received by a power receiving device, a power supply system, and a power supply method are provided. The power supply system includes a power supply device, and a first power receiving device configured to receive a power transmission signal transmitted from the power supply device. The power supply device includes an array antenna including a plurality of antennas configured to transmit power, and a power transmission controller configured to control a phase of the power transmission signal transmitted from the plurality of antennas to the first power receiving device and to perform power transmission control. The plurality of antennas are divided into a plurality of groups. Each group includes a plurality of antennas, each antenna being from among the plurality of antennas.

Abstract: A method for controlling a microgrid of a hydrometallurgical plant based on an energy storage frequency converter includes: controlling the opening and closing of a first circuit breaker and a second circuit breaker based on frequency change data of an AC bus in a plant microgrid. The energy storage frequency converter includes an energy storage unit, a first AC-DC converter, and an inverter. An input end of the first AC-DC converter is connected to an external power grid through an AC bus, and a first circuit breaker is provided between the first AC-DC converter and the external power grid. An input end of the inverter is connected to an output end of the first AC-DC converter, and an output end is connected to a variable frequency motor. The energy storage unit is connected between the output end of the first AC-DC converter.

Abstract: There are provided methods and systems for operating electric vehicles. One example method includes generating, at a first component of the electric vehicle, a message in a first communication protocol and converting, at a first conversion module associated with the first component, the message into a power line communication protocol to form a first converted message. The method also includes transmitting the first converted message over a power line connecting the first component to a second component of the electric vehicle, and converting, at a second conversion module associated with the second component, the first converted message into a second communication protocol to form a second converted message. The second communication protocol is used by the second component. In addition, the method includes receiving the second converted message at the second component.

Abstract: A power transmission apparatus 101 includes a communication unit 206 configured to wirelessly communicate with a power reception apparatus using an antenna, a power transmission unit 203 configured to wirelessly transfer power to the power reception apparatus using the antenna, a detection unit 204 configured to measure at least either a voltage or a current output from the antenna in a period where the transfer of the power is stopped and the communication by the communication unit 206 is not performed, and determine that there is an object different from the power reception apparatus based on the result of the measurement, and a control unit 201 configured to, if there is determined to be the object different from the power reception apparatus, restrict the transfer of the power.

Abstract: An inductive power transfer transmitter comprising: an inverter sub-circuit comprising at least one inverter, and a tuned circuit comprising a plurality of components including at least: a transmitting coil; a first tuning network comprising: an inductor, and a capacitor; a second tuning network comprising a first additional component wherein the plurality of components are arranged such that the tuned circuit can: vary current through the transmitting coil to compensate for variations in K coefficient, provide an output current from the inverter sub-circuit independent of a transmitting coil current.

Abstract: An electric work vehicle includes a frame and a traction device coupled to the frame. Furthermore, the electric work vehicle includes an electric motor configured to drive the traction device and an energy storage device configured to supply electric energy to the electric motor. Additionally, the electric work vehicle includes an electric charging port configured to receive electric power from a power source, with the electric charging port being electrically coupled to the energy storage device. Moreover, the electric work vehicle includes an electric outlet configured to provide electric power to a remote device, with the electric outlet being electrically coupled to the electric charging port and the energy storage device. In addition, the electric work vehicle includes a computing system configured to control a distribution of the electric power received by the electric charging port between the energy storage device and the electric outlet.

Abstract: A wireless power transmission device and a control method thereof are provided. The wireless power transmission device includes a wireless power transmitter, a communication interface, a sensing coil, a light source driver, a light source, and at least one processor. The at least one processor is configured to control the wireless power transmitter to transmit first power supplied by the working coil to the cooking appliance, control the light source driver to measure second power induced in the sensing coil when the first power is transmitted, and control the light source driver to set at least one of a light emission intensity of the light source, a light emission color of the light source, or a light emission form of the light source, based on the amount of the second power.

Abstract: A power transmitter for wireless power transfer includes a control and communications unit configured to provide power control signals to a power supply external to the power transmitter for controlling a power level of a power signal configured for transmission to a power receiver, the power supply configured to configure a direct current (DC) power based on the power control signals. The power transmitter further includes an inverter circuit configured to receive the DC power from the power supply external to the power transmitter and convert the input power to a power signal. The power transmitter further includes a coil formed of wound Litz wire and including at least one layer, the coil defining, at least, a top face and shielding comprising a ferrite core and defining a cavity, the cavity configured such that the ferrite core substantially surrounds all but the top face of the coil.

Abstract: A switch device includes: a power supply terminal; an output terminal; a switch element configured to be connected between the above terminals; a signal output terminal configured to output an output current detection signal corresponding to an output current that flows during the on period of the switch element; an overcurrent protection circuit configured to restrict the output current detection signal to an overcurrent restriction value or less during the on period of the switch element; and an output abnormality detection circuit configured to monitor, while switching between a first state where no current is supplied to the output terminal and a second state where a current is supplied to the output terminal during the off period of the switch element, the output voltage of the output terminal in each of the first and second states, and to switch the logic level of the output current detection signal.

Abstract: Polyphase wireless power transfer systems are provided. The transfer system may be used for charging hybrid and electric vehicles. The systems are capable of transferring over 50 KW over an air gap of 15 cm. The systems use a rotating magnetic field to transfer power. The system may comprise transmitter coil assembly. The coil assembly may be one or more layers. The system may employ either unipolar or bipolar coils. The transmitter also comprises compensating capacitance connected in series with at least one coil for each phase. A value of the compensating capacitance for each phase is determined such that the transmitter has at least two independently excitable resonant modes at a resonant frequency. The transmitter is compatible with a plurality of different receivers including three-phase, single phase with a circular coil and single phase with DD coils.

Abstract: This application discloses a method for implementing a fast power response and a power plant. The method is applied to a power plant-end power control apparatus, and includes determining a whole-plant reactive power target value and/or a whole-plant active power target value of the power plant. The method also includes determining, based on the whole-plant reactive power target value and/or the whole-plant active power target value, a second power control instruction readable to each photovoltaic inverter or power conversion system in the power plant.

Abstract: An efficiently compensated Inductive Wireless Power Transfer (IWPT) system, comprising an LCT having a primary side and a secondary side; an inverter that converts the input DC power to AC power at a predetermined operating frequency, the output of the inverter is being connected to the self-inductance of the primary side of the LCT via a compensation network consisting of a combination of capacitors and at least one inductor and residing solely at the primary side; a rectifier for converting AC power, induced at the secondary side of the LCT, to DC power, the input of the rectifier is being connected to the self-inductance of the secondary side of the LCT; a load being connected to the output of the rectifier; a DC power supply for feeding DC power to the input of the inverter and generating an induced power that is fed to the load.