Abstract: Disclosed is a power management device configured to stably supply power and save power by managing power quality includes a first switch, a converter, a voltage detector, a current detector, and a processor configured to control power of the power source to be supplied to the load through the first switch by turning the first switch on in an echo compensation mode, monitor power quality based on the detected current and the detected voltage, and when it is determined that the power quality has been abnormal, perform compensation control through the converter in a turned-on state of the first switch or control the power of the power source to be supplied to the load through the converter by turning the first switch off.

Abstract: This application discloses a photovoltaic device, a photovoltaic inverter, a system, and a power limit control method. The device includes a DC-DC converter circuit, an inverter circuit, and a controller. An input end of the DC-DC converter circuit is connected to a photovoltaic array, and an output end of the DC-DC converter circuit is connected to an input end of the inverter circuit. The controller is configured to: receive a power scheduling instruction, where the power scheduling instruction carries a power reference value; and when the power reference value is less than a power at a maximum power point, reduce an input current of the DC-DC converter circuit; or when an input voltage of the DC-DC converter circuit is greater than or equal to a preset voltage, increase an input current of the DC-DC converter circuit until an output power of an inverter becomes consistent with the power reference value.

Abstract: The invention relates to a system and method for supplying AC output power to at least one desired AC load. Values of electrical currents and/or voltages are measured by an energy measurement device within the system and an AC output power demand of the AC load is determined. An inverter unit inverts DC power received via the internal DC bus to AC power to supply AC output power to the connected AC load. The invention further comprises that the controller controls the electrical energy consumption of the inverter unit based on the AC output power demand.

Abstract: An inductive stove appliance that includes a stove housing; a minimum of three cooking zones, with at least two of the cooking zones comprising induction coils; an electric oven; a set of cooktop and oven controls configured for operation of the inductive stove appliance, including operation of the minimum of three cooking zones and the electric oven; a power cord with a plug configured to couple with a standard 120V, 15A-30A, electrical power receptacle of a power distribution system; and a battery system disposed within the stove housing of the inductive stove appliance with one or more batteries integrated into the stove housing configured to: store power obtained from the power cord with the plug coupled with the electrical power receptacle of the power distribution system, power the minimum of three cooking zones of the inductive stove appliance, and power the electric oven of the inductive stove appliance.

Abstract: A DC bus control system for controlling power fluctuations in a DC bus connecting an input power source and a load, comprising: a main stabilization device including a first charging/discharging element and a first power converter; a plurality of the sub stabilization devices including a second charging/discharging element, a charging element, or a discharging element and a second power converter, wherein the plurality of the sub stabilization devices includes a first sub stabilization device having a charging/discharging element and a second power converter and at least one second sub stabilization device having a charging element or a discharging element and a second power converter, and a response speed of the first sub stabilization device is set such that a charging amount of the charging element or a discharging amount of the discharging element of the second sub stabilization device changes with a predetermined time constant.

Abstract: An electric circuit for a high-voltage network of a vehicle. the high-voltage network includes at least two electrical energy stores. The electric circuit includes a first and second connection points, which are configured for electrical connection to a consumer (19) and/or a charger (21). A first switching unit is arranged between a first pole connector and the first connection point. A second switching unit is arranged between a second pole connector and the second connection point. A third switching unit is arranged between the first connection point and a third pole connector, and a fourth switching unit is arranged between the second connection point and a fourth pole connector. The first switching unit and/or the second switching unit are designed to be galvanically isolating in an electrically disconnecting state, and the third and fourth switching units are embodied as semiconductor components.

Abstract: A coil component includes a core including a winding core portion, a first flange portion, and a second flange portion, and a plate member that is mounted on the first flange portion and the second flange portion. A distance in a height direction between the plate member and the first flange portion, or a distance in the height direction between the plate member and the second flange portion, or both vary in a length direction, or in a width direction, or both.

Abstract: An energy storage system used in a flight vehicle includes: a plurality of energy storage apparatuses; and a power transfer circuit that is connected to the plurality of energy storage apparatuses and transfer electric power between the plurality of energy storage apparatuses.

Abstract: A wireless power reception circuit system includes a wireless power reception circuit, an electric storage device, a load unit, a digital control circuit, a voltage conversion circuit, a DC-DC converter, smoothing capacitors, a voltage OR circuit, and an external signal setting circuit for resetting the digital control circuit. An enable signal input terminal of the voltage conversion circuit is in a disabled state when the voltage conversion circuit is not controlled by the digital control circuit. The digital control circuit supplies an enable signal to the enable signal input terminal of the voltage conversion circuit when operating the voltage conversion circuit.

Abstract: Active electromagnetic shielding for dynamic high power wireless charging and related electrified roadway systems, method, and wireless power transmitters is disclosed. A wireless power transmitter includes a first canceling coil offset from a power transmission coil, a second canceling coil offset from the power transmission coil, and circuitry electrically connected to the first canceling coil and the second canceling coil. The circuitry is configured to deliver canceling currents to the first canceling coil and the second canceling coil to destructively interfere with portions of electromagnetic fields generated by the power transmission coil.

Abstract: A secure, reliable and simplified control mechanism for operating an inverter is provided. In particular, a mechanical switch is used for connecting a local grid with a public grid and for disconnecting the local grid from the public grid. The mechanical switch comprises an intermediate position. Each time when the switch is in this intermediate position, the inverter is immediately shut down in a fast shutdown operation.

Abstract: A power reception apparatus wirelessly receives power from a power transmission apparatus, measures a value corresponding to received power in a first period in which the power transmission apparatus limits power transmission, measures, in a second period, a value corresponding to received power used to detect an object different from the power transmission apparatus and the power reception apparatus based on a relationship between a value corresponding to transmitted power in the power transmission apparatus and a value corresponding to the received power in the power reception apparatus, controls a timing of the second period such that the first period and the second period do not overlap.

Abstract: A thermal power unit-flywheel energy storage cooperative frequency regulation control method and system is provided, which belongs to the technical field of a power grid. First, a real-time output increment of a thermal power unit is predicted, then a real-time frequency regulation power instruction of a flywheel energy storage system is determined based on the predicted real-time output increment of the thermal power unit, and finally the frequency regulation power instruction of the thermal power unit is determined by a difference adjustment coefficient of a governor and a grid frequency deviation. The thermal power unit and flywheel energy storage system is cooperatively controlled by frequency regulation based on the real-time output increment predicted value of the unit, which realizes self-adaptive adjustment of output of the flywheel energy storage system under dynamic working conditions, and improves the grid frequency stability and operation safety of the thermal power unit.

Abstract: A wireless power transmission apparatus comprises: a plurality of transmission coils configured to transmit a wireless power to a wireless power reception apparatus; a shielding coil which is arranged on at least one surface of a dielectric substrate, and is configured in a loop shape having at least two turns so as to surround the plurality of transmission coils; and a capacitor configured to connect one point to the other point of the shielding coil. The plurality of transmission coils are arranged inside the shielding coil disposed on the dielectric substrate, and the direction of a magnetic field formed at one side and the other side of the plurality of transmission coils adjacent to the shielding coil is formed to be opposite to the direction of a magnetic field formed around the shielding coil so that the shielding coil shields external exposure of electromagnetic waves by the plurality of transmission coils.

Abstract: Provided are a to-be-charged device, a wireless charging device, and a wireless charging method. The to-be-charged device includes a battery, at least two wireless receiver circuits, and a control circuit. Each of the at least two wireless receiver circuits is coupled to the battery, and is configured to receive an electromagnetic signal transmitted by a wireless charging device, and convert the electromagnetic signal into a charging current for charging the battery. The control circuit is coupled with each of the at least two wireless receiver circuits, and is configured to, in various charging stages or in different charging modes, control at least one of the at least two wireless receiver circuits to charge the battery.

Abstract: An aircraft has a first antenna arrangement, a payload and a processing unit. The first antenna arrangement is designed to wirelessly receive electromagnetic signals. The processing unit is coupled to the first antenna arrangement, on the one hand, and to the payload, on the other hand. The processing unit is designed to modulate an electromagnetic signal received by the first antenna arrangement and thereby to generate a first modulated signal and to forward it to the payload. The payload is designed to use the first modulated signal as working signal. A radiofrequency power signal on an uplink is thus remodulated into a payload working signal, such that the payload working signal is able to be used directly by the payload without rectification into a DC voltage.

Abstract: This application provides an uninterruptible power system and a driving method for an uninterruptible power system, and relates to the field of power conversion technologies, to resolve output interruption of the uninterruptible power system. The uninterruptible power system includes a first power input end, a second power input end, a load end, and a bypass, where the bypass includes a first bidirectional switch, and the first bidirectional switch is connected to the first power input end and the load end, and is configured to control connection or disconnection between the first power input end and the load end; and at least one main circuit, where each main circuit includes a bus and an inverter output unit. An input end of the bus is connected to the second power input end, and an output end of the bus is connected to the inverter output unit.

Abstract: A method and a device for on-grid and off-grid dispatch, and an energy storage air-conditioning system are provided. The method for on-grid and off-grid dispatch includes: causing a load to be off-grid and causing an energy storage converter to supply power to the load after determining that grid is down; determining a given power and a given voltage according to a voltage and a current of the load obtained for the last time before the grid is down; and obtaining an actual voltage and an actual current outputted by the energy storage converter; and adjusting an output parameter of the energy storage converter according to the given power and the given voltage, as well as the actual voltage and the actual current outputted by the energy storage converter.

Abstract: A wireless power receiving system includes: a power receiving device having a power receiving coil configured to receive electric power supplied wirelessly from a power transmission coil of a power transmission device installed on a road surface, at least part of the power receiving coil being contained in a vehicle wheel; and in-vehicle devices installed in a mobile object, the in-vehicle devices being energizably connected to the power receiving device. The power receiving device transmits the received electric power to the in-vehicle devices.

Abstract: An electric circuit for a high-voltage network of a vehicle. The high-voltage network includes at least two electrical energy stores. The electric circuit includes at least one first switching unit, one second switching unit, and one third switching unit electrically connected to the poles of the electrical energy stores and allowing a parallel and a series connection between the two electrical energy stores. The electric circuit includes at least one fourth switching unit and one fifth switching unit electrically connected to one pole connector each and to one consumer connection. The consumer connection is makes electrical contact with an electrical consumer or a charging unit. The switching units are switchable between an electrically disconnecting and connecting states. The fourth and fifth switching units are galvanically isolating in an electrically disconnecting state. The first switching unit, the second switching unit, and the third switching unit are designed as semiconductor components.