Abstract: A plurality of DC power supply apparatuses which are CVCC power supplies have output sides connected in parallel to a load. In each of the plurality of DC power supply apparatuses, an upper limit current maintained in a CC mode is designed to be equal to or lower than a rated current. Reference voltages of the plurality of DC power supply apparatuses are set to different values. The plurality of DC power supply apparatuses supply currents with transition from a CV mode to a CC mode, in the descending order of magnitude of the reference voltages, in correspondence with output currents to the load.

Abstract: A method for diagnosing a fault in an electric power distribution network includes measuring three-phase current signals from local and remote terminals of a protected zone on the network, and computing differential current signals based on the measured three-phase current signals. The differential current signals are preprocessed using a filter to smooth the differential current signals. A maximal overlap discrete wavelet transform is applied on the smoothed differential current signals to obtain a plurality of detail coefficients. Observation signals comprising the plurality of detail coefficients are provided to a deep reinforcement learning (DRL) agent comprising a temporal convolution attention-based neural network (TCAN). The TCAN DRL agent is trained using a proximal policy optimization (PPO) method to propose a trip action corresponding to a trip or no trip command for a fault condition. Responsive to receiving a trip command, a trip signal is transmitted to a circuit breaker.

Abstract: A frequency stabilizer includes a bidirectional AC/DC converter, a bidirectional DC/DC converter, a first energy storage system, a second energy storage system, and a building. The bidirectional AC/DC converter is connected between an AC power system and the first energy storage system. The bidirectional DC/DC converter is connected between the first energy storage system and the second energy storage system. Two or more of the first energy storage system, the second energy storage system, the bidirectional AC/DC converter, and the bidirectional DC/DC converter are disposed inside the building.

Abstract: A for ensuring grid stability by using a distributed ledger, the method comprising the steps: measuring metrics from a plurality of distributed energy resource, DER, wherein said metrics are related to grid stability; storing (a) said metrics/measurements in the distributed ledger; transferring said metrics from the distributed ledger into a smart contract (2); computing any deviations between said metrics and predetermined values stored in advance in the smart contract (2) by executing the smart contract; transferring and storing results from the computing step in the distributed ledger; and transferring said results from the distributed ledger to the respective DER of the plurality of DERs, wherein said DER receives positive or negative values which regulates the amount of contribution to the grid.

Abstract: An example operation includes one or more of determining, by a vehicle, an amount of energy to provide to a location, the energy located in one or more energy sources including the vehicle, an energy storage device, and an electric grid, the determining based on an ambient temperature of the vehicle, an ambient temperature of the energy storage device, a capacity of a battery in the vehicle, a capacity of the energy storage device, a demand of the electric grid, and an internal temperature of the location; and directing, by the vehicle, at least one of the energy sources to provide the amount of energy, based on determining.

Abstract: An electrical power generating system for providing auxiliary or backup power to a load bus. The system may be used indoors, and generally includes a fuel cell unit comprising a first DC output, an electrical storage unit comprising a DC input coupled to the first DC output of the fuel cell, the electrical storage unit further comprising a second DC output. An inverter coupled to the second DC output receives power, the inverter comprising a first AC output. The system includes a contactor connected between the first AC output and an AC load bus. The AC load bus comprises an AC voltage, and a controller comprising inputs is adapted to sense a phase, a frequency, and a magnitude of the first AC output and the AC voltage and close the contactor when they substantially match.

Abstract: A high power (HP) generator includes a plurality of low power (LP) generators, a coupling in which the plurality of LP generators is electrically connected, and a control unit. During operation, a coupling-value at an output of the coupling is higher than an LP-generator-value at an output of one of the plurality of LP generators. The control unit is configured to select a contribution of each LP generator to an output value of the HP generator, in a way that one or a combination of following is accomplished: (i) the output of the coupling and/or the output of the HP generator is a step function, (ii) the plurality of LP generators is activated sequentially during a pulse, (iii) at least one amplitude step is lower than 1 kV, and (iv) the plurality of LP generators is connected by switching only.

Abstract: A charging system for electric vehicles includes a number N of charge ports, each charge port having an interface for power exchange with an electric vehicle, a number M of modular energy storage direct converter systems (MESDCS), a switchable connection matrix, and a control system. The control system is configured to control an output voltage of each MESDCS. The switchable connection matrix is configured to connect one or more selected MESDCS with each given charge port and is further configured to connect one or more selected MESDCS with a power source.

Abstract: The present disclosure provides an energy storage system, device, and method of operating thereof. The device includes multiple capacitor cells, e.g., encapsulated capacitor cells, connected in series. A MOSFET-based, cross-point switch can be connected to the individual capacitor cells to manage balancing. Sensors can monitor the individual capacitor cells and provide data to a processor that determines instructions for the array of switches and individual capacitor cells. The capacitor cells can include capacitors based on solid-state dielectrics. A method of charge balancing, e.g., charge balancing with the energy storage device or system, can include sending instruction to a digital control port embedded within each capacitor cell.

Abstract: The present application relates to an electric riding vehicle, wherein the battery is used as an energy storage power source. The electric riding vehicle includes an electric riding vehicle and an inverter. The electric riding vehicle includes an electric bicycle, an electric motorcycle car, an electric scooter, an electric balance car, an electric two-wheeled vehicle, an electric tricycle and an electric four-wheeled vehicle. The electric riding vehicle includes a controller, at least one battery, and one motor. The at least one battery is detachably arranged on the frame of the electric riding vehicle as a power source and is electrically connected to the controller. The controller is electrically connected to the motor. The inverter is electrically connected to the battery. The current output by the battery is changed by the inverter to power an electrical equipment and the battery is converted into an energy storage power source.

Abstract: A method for charging an electronic device and a wireless charger having a set of transmitter coils and a plurality of magnetic field sensors are disclosed. The method may comprise measuring magnetic fields in a predetermined charging region, detecting a change in the magnetic fields, and selecting the subset of the transmitter coils associated with the one of the magnetic field sensors. The method may further comprise energising each transmitter coil in the subset of the transmitter coils to transmit a predetermined maximum power output, selecting one transmitter coil from the subset of the transmitter coils, determining a first power output of said one transmitter coil, and energising said one transmitter coil to transmit at the first power output.

Abstract: A stator for an electrical machine includes: an annular housing extending around a central axis (X-X); a first circumferential flow channel extending around the housing; a second circumferential flow channel axially spaced from the first circumferential flow channel and extending around the housing; and a plurality of windings. The plurality of windings are circumferentially spaced about the housing to form a passage between each two adjacent windings. Each passage is in fluid communication with both the first circumferential flow channel and the second circumferential flow channel. The first circumferential flow channel is closed to flow at a first circumferential location and the second circumferential flow channel is closed to flow at a second circumferential location, removed from the first circumferential location so as to form a first set of passages (S1) connected in parallel and a second, separate set of passages (S2) connected in parallel.

Abstract: A rotor core lamination is provided. The rotor core lamination includes a plurality of salient poles. Each of the salient poles includes: a pole body having a central axis in a radial direction of the rotor core lamination; and a pole shoe extending radially outward from the pole body, wherein the pole shoe has a pole shoe arc, and a central point of the pole shoe arc is offset from the central axis.

Abstract: Provided are a coil, a stator, and a motor that can suppress generation of eddy current in the coil and reduce Joule loss. A coil is formed by connecting a plurality of one-turn regions each including a turn of a conductor to have a helical structure. The conductor is formed by connecting a first member to a second member in a longitudinal direction, and the plurality of one-turn regions include at least in a part thereof the first member.

Abstract: Provided are a stator for a rotary electric machine and the rotary electric machine. The stator includes a stator core, and a stator winding formed in a plurality of phases, the stator winding including a slot conductor and a crossover conductor configured to connect ends of a pair of the slot conductors, the ends placed at a same side of the pair of slot conductors.

Abstract: A DC brushless motor is provided, which includes a housing, a motor assembly, a control board and a dividing plate. Wherein, the motor assembly is arranged in the housing, and a connecting terminal is arranged on it. The control board is arranged in the housing and electrically connected with the connecting terminal. The dividing plate is arranged in the housing and is used to divide the motor assembly from the control board. The disclosure is used to solve a problem of complicated internal wiring of a motor caused by a division of the motor and a controller of the conventional DC brushless motor.

Abstract: A single circuit board assembly for forming a vehicle-motor interface includes a first side of a board with logic modules located thereon. The single circuit board assembly also includes a second side of the board with power modules located thereon. The board comprises a first plurality of layers and a second plurality of layers, the first plurality of layers adjacent the first side of the board and the second plurality of layers adjacent the second side of the board, wherein the first plurality of layers has a first total thickness and the second plurality of layers has a second total thickness, wherein the first total thickness is different than the second total thickness.

Abstract: Interested parties would like to track the location of one or more towed transport platforms continuously when they are in motion. Existing monitoring systems are powered by a combination of solar power, batteries, and intermittent tractor platform power for electrical power. All of these power sources have limitations in providing power when a towed transport platform is in motion. Solar power is not available at night. Batteries run out of energy and must be recharged. Tractor platform power is not always available to a towed transport platform. The embodiments of the invention convert the kinetic energy of a moving towed transport platform into electrical power, providing continuous power for a monitoring system to operate.

Abstract: A constant micro power energy system (CMPES) device to harness sustainable energy sources and generate power including a main body structure having a base plate, a frame extending from the base plate, and a top plate positioned at the top of the frame. The CMPES device includes a flask barrel positioned in the frame and motors positioned on the top plate. The CMPES device includes a ring gear connecting the flask barrel and a motor shaft of the motor. The CMPES device includes disc generators positioned inside the flask barrel. The motors supply power to drive the flask barrel to rotate constantly at a predetermined speed in order to generate continuous and simultaneous Alternating Current (AC) and Direct Current (DC) electrical power output. The motors facilitate direct transmission to the disc generators in order to provide the electrical power output to panel systems connected to the CMPES device.

Abstract: A method for manufacturing a brushless motor includes providing a sleeve having a plurality of deformation zones spaced around a circumference of the sleeve, and a plurality of counterbores each having a rounded bottom and extending over the length of an inner surface of the sleeve such that only one of said plurality of counterbores is disposed between adjacent ones of said plurality of deformation zones. Metal rings are stacked to form a stator having a plurality of partitions each having a flat end face for engaging the inner surface of the sleeve. Copper wires are wound around the partitions, and the stack is mounted in the sleeve so that the end faces of the plurality of partitions are positioned adjacent the deformation zones. A rotor is provided, and is inserted into an inner cavity of the stator.