Abstract: An energy system for providing electrical energy to a device where the energy system includes: a first battery for providing a first electrical power over a first time period; a second battery for providing a second electrical power over a second time period, the second battery being a type different from a type of the first battery, the second power being greater than the first power and the second time period being smaller than the first time period; and a controller for controlling initiation of the first battery and the second battery at predetermined times to satisfy a specific power requirement of the device over a time period including the first and second time periods.

Abstract: According to an example aspect of the present invention, there is provided an apparatus comprising a memory configured to store classifier parameters, and at least one processing core configured to use a classifier and the classifier parameters to determine a category of least one data composition, the at least one data composition comprising utility usage information concerning a utility unit, the category comprising a life condition present in the at least one utility unit.

Abstract: An Uninterruptible Power Supply (UPS) including an input configured to receive input AC power, a DC output configured to provide output DC power to a load, an AC output configured to provide output AC power to the load, a charger coupled to the input and configured to convert the input AC power into DC power, a DC bus, and a controller configured to monitor a current demand at the DC output relative to a demand threshold, operate, in response to a determination that the current demand at the DC output is below the demand threshold, the UPS in a first mode of operation by enabling the charger to provide DC power to the DC bus, and operate, in response to a determination that the current demand at the DC output is above the demand threshold, the UPS in a second mode of operation by disabling the charger.

Abstract: Systems, apparatuses, and methods are described for a versatile UPS. The versatile UPS is operative to provide power to a load and to an interconnected network for delivering electricity from producers to consumers (i.e., an electricity grid, or simply, “a grid”). The versatile UPS has a plurality of switches providing for a multiplicity of switching states. The output to the load, the grid, or both is dependent, at least in part, on the switching states. Related systems, methods and apparatus is also described.

Abstract: An uninterruptible power supply system includes: at least one AC input terminal; an AC output terminal; an DC input terminal; at least one uninterruptible power supply (UPS) device having: a DC link; a DC/AC converter connecting on a first side to the DC link and on a second side to the AC output terminal; and a DC/DC converter connecting on a first side to the DC input terminal and on second side to the DC link. The uninterruptible power supply system further includes at least two switches; and at least one coupled differential mode inductor having two windings. Each switch of the at least two switches is connected in series with at least one winding of the at least one coupled differential mode inductor forming a series connection. The series connection is connected on a first side to the at least one AC input terminal.

Abstract: Aspects are described for a device comprising a wireless transceiver configured to receive a radio frequency (RF) emission from a source device, an energy-harvesting unit configured to charge the first device wirelessly, using a first part of the RF emission, and a processor communicatively coupled to the transceiver. The processor is configured to modulate the first part of the RF emission based on information detected by the device and determine that an energy level of the device is above a threshold. The processor is further configured to transmit, in response to determining that the energy level is above the threshold, using the wireless transceiver, the modulated first part of the RF emission to the source device. The processor is further configured to transmit, in response to determining that the energy level is above the threshold, using the wireless transceiver, a second part of the RF emission wirelessly to another device to charge the other device.

Abstract: A power conversion system comprising a system controller configured to generate an input signal in response to a system input and a switch controller coupled to the system controller, the switch controller configured to control a power switch. The switch controller comprises a driver interface configured to receive the input signal that indicates whether the power switch should be ON or OFF, the driver interface further configured to transmit one or more current pulses across a galvanic isolation using an inductive coupling. The driver interface further comprises a first local power supply configured to increase an output voltage of the first local power supply when a transmission of current pulses is imminent.

Abstract: A power bank includes, in part, a rechargeable battery, a wireless power recovery unit adapted to receive power wirelessly, a battery charging circuit adapted to deliver the power recovered by the power recovery unit to the rechargeable battery, an output interface, and a voltage reconditioning circuit adapted to supply power from the rechargeable battery to the output interface for delivery to an external device. The wireless power recovery unit may include one or more of a multitude of photodiodes adapted to convert a coherent optical signal to electrical power, an acoustic transducer adapted to convert acoustic waves to an electrical power, an inductive coupling circuit adapted to convert time varying magnetic flux to electrical power, and an RF power recovery unit adapted to convert an RF signal to electrical power.

Abstract: A coil structure for wireless power transmission is provided. The coil structure comprises: a primary resonance coil wound in a spiral shape around a centripetal point; a primary induction coil, which supplies power to the primary resonance coil in a nonconnected state with an input or output terminal of the primary resonance coil and is wound in a spiral shape on a substantially same plane around a substantially same centripetal point as the centripetal point; a switch configured to be parallel with the primary resonance coil so as to control the ON and OFF of an operation of the primary resonance coil; and a capacitor coupled to the primary resonance coil so as to form a magnetic resonance with the primary resonance coil.

Abstract: Methods, apparatus and systems supporting coexistence of wireless transmission equipment in shared wireless medium environments. The techniques provided herein may be applied to various types of wireless transmission equipment. Under one example, a wireless power transmission system (WPTS) delivers power to wireless power receiver clients via transmission of wireless power signals using one or more frequencies and/or channels within shared wireless medium environments in which other wireless equipment is operating, such as access points and stations in wireless local area networks (WLANs).

Abstract: The disclosure provides a wireless charging device including a metal frequency-selective box and an internal charging system disposed inside the metal frequency-selective box for wireless charging. The internal charging system includes a multi-antenna subsystem including N antenna units; N is an integer greater than 2, and the antenna units are dipole antennas, microstrip patch antennas, microstrip slot antennas, helical antennas, or dielectric resonator antennas. The N antenna units are evenly disposed, in a two-dimensional ring, on inner sides of four side faces of the metal frequency-selective box, or disposed on a three-dimensional curved surface of the entire inner side of the metal frequency-selective box. The device to be energized is disposed in the metal frequency-selective box and is surrounded by the N antenna units.

Abstract: A display system may include a wireless power transmitter that converts power supplied from a power source unit into a first magnetic field and to transmit a first power signal to a speaker; the speaker including a wireless power transmission/reception circuit that converts the first power signal received from the wireless power transmitter into a first current, and to generate a second magnetic field by the first current to transmit a second power signal to a display, a distribution circuit that distributes power received through the first power signal to a sound output unit by distributing the first current and outputting a second current, and the sound output unit that outputs sound using power supplied from the distribution circuit; and the display including a wireless power reception circuit that converts the second power signal received from the speaker into a third current, and an image output unit that outputs an image by using power transferred through the third current.

Abstract: Disclosed herein is a wireless charging apparatus for preventing cancelation of magnetic fields generated between a plurality of adjacent transmission coils by placing a repeater on the plurality of transmission coils, the wireless charging apparatus including a plurality of transmission coils spaced the same distance apart from a reference point, and a repeater placed on the plurality of transmission coils to be overlapped with each of the plurality of transmission coils with respect to the reference point that is a center, wherein a coupling coefficient between each of the plurality of transmission coils and the repeater is higher than a coupling coefficient between the plurality of transmission coils.

Abstract: An example method is provided for detecting and classifying foreign objects, performed at a computer system having one or more processors and memory storing one or more programs configured for execution by the one or more processors. The method includes obtaining a plurality of electrical measurements while a wireless-power-transmitting antenna is transmitting different power beacons. The method also includes forming a feature vector according to the plurality of electrical measurements. The method further includes detecting a presence of one or more foreign objects prior to transmitting wireless power to one or more wireless power receivers by inputting the feature vector to trained one or more classifiers, wherein each classifier is a machine-learning model trained to detect foreign objects distinct from the one or more wireless power receivers.

Abstract: A method of controlling a power transmitter includes entering a negation phase with a power receiver including receiving a foreign object detection status packet from the power receiver, detecting whether a foreign object is present based on the foreign object detection status packet, and transmitting a NACK response to the power receiver indicating the power transmitter has detected the foreign object is present or transmitting an ACK response to the power receiver indicating the power transmitter has detected the foreign object is not present; and entering a power transfer phase including transmitting a first power to the power receiver in response to the transmitted NACK response and again detecting whether the foreign object is present while transmitting the first power, and transmitting a second power greater than the first power in response to the transmitted ACK response.

Abstract: An electronic device such as a portable electronic device has wireless power receiving circuitry. A vehicle has a vehicle remote keyless system that transmits beacons. A key receives the beacons and responds with key codes to unlock doors and enable a vehicle ignition in the vehicle. In the presence of wireless power transfer operations there is a risk that wireless power signals will interfere with the reception of the beacons by the key. To ensure that beacons are satisfactorily received, conditions in which there is a risk of interference are detected and corresponding interference mitigation operations are performed.

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: The disclosure relates to methods for detecting a plug-in operation of a charging connector in a charging socket of an electrically drivable vehicle, wherein the charging connector has a control signal line for transmitting control signals between the electrically drivable vehicle and a charging station, including: detecting an amplitude change of a control signal on the control signal line in order to detect the plug-in operation.

Abstract: The present disclosure provides hybrid stator core components for an axial flux motor stator and methods for making the same. The hybrid stator core component includes a molded soft magnetic composite material and a laminated component. In one variation, a laminated insert comprising a plurality of insulated layers is non-releasably seated within a molded soft magnetic composite material. In another variation, a hybrid stator core component has a molded soft magnetic composite core and a laminated shell comprising a plurality of layers disposed around at least a portion of the molded soft magnetic composite core.

Abstract: A torque ripple in a rotary electric machine is sufficiently reduced. At least two of the plurality of laminated plates in the rotor core include a magnetic pole having the base formed on the outer peripheral side of the storage space, and a bridge part connected to the magnetic pole. A plurality of magnetic poles are provided in the circumferential direction, and the first space is formed between the bases of a pair of magnetic poles adjacent in the circumferential direction. The q-axis outer peripheral portion, which is located between the pair of circumferentially adjacent magnetic poles and is in contact with the first space, is provided on the inner peripheral side of the base. The base includes the side surface portion which is in contact with the first space, and the protrusion which is provided on the outer peripheral side of the side surface portion and protrudes in the circumferential direction with respect to the side surface portion.

Abstract: A rotor for an electric machine is provided. Permanent magnets are disposed on the rotor such that the permanent magnets cannot carry out any tangential movement. The rotor may have four shoulders that extend away from a shell surface of the rotor in a radial direction. Primary permanent magnets that are disposed so as to be mutually contiguous and contiguous to the respective shoulders and accordingly cannot be displaced are in each case located between the shoulders. Secondary permanent magnets are disposed on the shoulders such that an annulus of magnets that is free of gaps and voids and is not movable in the tangential direction is formed.

Abstract: An electric motor includes an end turn ring and a cooling structure that is in a thermally conductive relationship with the end turn ring.

Abstract: An electric machine provided with a stator structure including internal and external layers of interleaved pre-wound coils made of rectangular wire coated with enamel insulation varnish is described herein. The two layers of pre-wound coils allow the use of slightly different size of pre-wound coils, which facilitates their insertion into the stator slots.

Abstract: A stator includes first exterior members that surround sides of outer circumferential portions of coil ends on both end sides of an iron core, second exterior members connected to the first exterior members, and which surround sides of end portions of the coil ends in the axial direction, and mold members that cover the coil ends and are placed in contact with the first exterior members and the second exterior members. Holes are formed in the second exterior member on one end side, and a surface that faces the mold member, of the second exterior member on the one end side, is inclined in a manner so that a thickness thereof becomes continuously thinner toward the holes.

Abstract: A motor stator has a core and first, second and third hairpin wires. The core has slots, an insertion side and an extension side. Each first hairpin wire has its first hairpin first leg inserted into a third layer of the slots and its first hairpin second leg inserted into a sixth layer of the slots. Each second hairpin wire has its second hairpin first leg inserted into a fourth layer of the slots and its second hairpin second leg inserted into a fifth layer of the slots. Each third hairpin wire has its third hairpin first leg inserted into a first layer of the slots and its third hairpin second leg inserted into a second layer of the slots. At the extension side, a plurality of immediately-adjacent hairpin legs are connected to form first and second winding sets.

Abstract: An electric motor includes: a housing having a first rotor bearing and a stator support surface; a cantilever stator that includes a lamination stack, a first side of the lamination stack abutting the stator support surface and a second side of the lamination stack abutting a stator endbell that has a second rotor bearing, wherein the cantilever stator is held by way of tie rods attaching the stator endbell to the housing; and a rotor in the cantilever stator, the rotor held by the first and second rotor bearings.

Abstract: An electric drive device includes: a motor housing for housing an electric motor, wherein the motor housing includes an end face part opposite to an output part of a rotating shaft of the electric motor; and an electronic control part arranged at the end face part. The electronic control part includes a control circuit part, a power supply circuit part, and a power conversion circuit part, which are covered by a metal cover, wherein the metal cover is fixed water-tightly to the end face part. The end face part includes a power conversion heat dissipation region and a power supply heat dissipation region. Each of the control circuit part and the power supply circuit part is contained on a circuit board, wherein the circuit board is placed along a plane perpendicular to the rotating shaft, and layered with each other in an axial direction of the rotating shaft.

Abstract: The invention provides a power generation method and a system equipped with energy storage and energy release accommodation mechanism. By using an energy storage and energy release accommodation system arranged in the system, the generator set at an end of the system can immediately supplement energy from an energy storage unit after providing electric energy to a load, so that the output energy will not drop suddenly, while still stably maintaining both the rated energy output and the system operation.

Abstract: The invention relates to a spur gear (1) for a transmission (35) for a brushless electric motor (10), having a toothed portion (32), with a receiving bore (38) formed in the region of the toothed portion (32) in order to receive a rotor shaft (30), and having a signal generating portion (34) rotationally fixed to the toothed portion (32) with multiple magnetic field generating regions (48), which are adapted to interact with a magnetic field sensing element (50) especially a Hall element, in order to detect the rotary angle position of the spur gear (1) as it turns about an axis of rotation (20).

Abstract: A Sub-Terrestrial Updraft Tower (STUT), combination subsurface Downdraft/Updraft Tower, comprising an Inner Updraft Shaft and Outer Downdraft Shaft, housing the Inner Updraft Shaft, receiving air flow from air-inlets at surface level into Outer Downdraft Shaft. Upon reaching the bottom of the Outer Downdraft Shaft, air flow reverses In direction, inward and upward, into the Inner Updraft Shaft.

Abstract: Provided is a rotor for an asynchronous rotary electrical machine with non-through shaft that includes a cylindrical magnetic mass gripped between two mounting flanges of two half-shafts, a cooling means capable of cooling the rotor and conductive bars housed within the magnetic mass and distributed substantially uniformly over a diameter of the magnetic mass. The cooling means includes, for each conductive bar, at least one cooling channel, opening onto the conductive bar according to an axial direction and located within the magnetic mass and at least one through hole arranged within each conductive bar in such a way that the cooling channel communicates with at least one hole arranged on the outer periphery of the magnetic mass.

Abstract: A vehicle drive device includes: a first rotary electric machine; a second rotary electric machine that is arranged below the first rotary electric machine; and a case having a rotary electric machine housing portion that houses the first rotary electric machine and the second rotary electric machine. The first rotary electric machine and the second rotary electric machine are cooled by a refrigerant flowing inside the case, and in the rotary electric machine housing portion, a guide portion that prevents the refrigerant, which has cooled the first rotary electric machine, from being applied to the second rotary electric machine is provided.

Abstract: An electric motor includes a stator assembly, a rotor provided inside the stator assembly, and a heat sink to radiate heat from the stator assembly. The heat sink includes a base portion, and a heat radiating portion formed integrally with the base portion.

Abstract: A cooling cap for a stator of an electrical machine of a motor vehicle is provided. The cooling cap can be fitted onto an end winding of electrical windings of the stator which project beyond an axial end of a laminated core of the stator and which cooling cap is designed as a heat sink for cooling the end winding, wherein the cooling cap is formed, at least in regions, from an electrical insulating material. A stator and a motor vehicle including the cooling cap are also provided.

Abstract: To provide a motor inhibiting emission of electromagnetic noise (EMC) to the outside and a rotary apparatus including the motor. The rotary apparatus (10) of the present disclosure includes: a housing (20); a motor (40) arranged inside the housing (20); a circuit board (50) arranged inside the housing (20) and electrically connected to the motor (40); and a flexible wiring board (44) electrically connecting the motor (40) to the circuit board (50), the motor (40) including a frame (41a) formed with a conductive member, the frame (41a) electrically connected via the flexible wiring board (44) to a ground of the circuit board (50).

Abstract: A motor includes a sheet-like gasket for sealing the gap between a stator core and an encoder. The gasket has a structure including a metal plate and a sealing member covering the metal plate, and the gasket includes a first portion that is disposed at least between the end face on one end side of the stator core and the encoder and a second portion that has a structure including the sealing member with no metal plate and extends inward from the first portion to contact the projection.

Abstract: A motor includes a rotor rotatable about a center axis extending vertically, a stator radially opposing the rotor, a bracket holding the stator, a circuit board including an upper surface with a first wiring pattern and a lower surface with a second wiring pattern, and a first fixing portion having conductivity and fixing the circuit board to the stator. The stator includes a stator core having conductivity. The first fixing portion includes a board holding portion holding the circuit board, and a stator fixed portion fixed to a portion of the stator core. The board holding portion is in contact with the first wiring pattern and the second wiring pattern.

Abstract: A rotor assembly for an electric machine includes a cylindrical rotor core, a set of posts extending radially outward from the rotor core defining a set of slots between adjacent posts, a set of windings formed by conductive wire wound in the set of slots having end turns extending axially beyond the rotor core, and a retention case overlying the end turns.

Abstract: A motor may include a rotor and a stator. The stator may include first and second stator assemblies. Each stator assembly may include a coil wound around a tube-shaped body part of a bobbin comprising a terminal block; and first and second stator cores disposed on opposite sides of the coil. The first stator cores of the first and second stator assemblies are welded together at outer peripheries of the first stator cores of the first and second stator assemblies. The welded portion may be covered by the terminal block of one of the first stator assembly or the second stator assembly on an outer side in the radial direction with a predetermined space between the welded portion and the terminal block.

Abstract: The present invention relates to a brushless motor, and an objective of the present invention is to provide a brushless motor which can significantly reduce the cogging torque and torque ripple of the motor by minimizing the rate of change of magnetoresistance in accordance with a change in position of a rotor through the optimization of the shape design of the rotor and a stator, and can also reduce the weight of the brushless motor through the optimization of the shape design taking into consideration the materials of the rotor and the stator.

Abstract: A linear or rotary step motor for moving an object comprising: one or more beam actuators; and one or more auxiliary actuators. Each beam actuator comprises: (a) a flexible beam; (b) two holders holding the flexible beam from the beam edges; and (c) an actuator for moving the said at least one holder in order to bent the beam toward the object or to pull the beam away from the object. The axillary actuators are connected to the one or more beam actuators. The beam actuators configured to grip or release the object, and the one or more beam actuators perform a movement step to the object by first grip the object by the one or more beam actuators then push the object by activating the auxiliary actuator.

Abstract: In a drive device having a tubular linear motor with a stator (1), an armature (2) and a bottom flange (30), the stator (1) is arranged on the bottom flange (30) in thermal contact with the bottom flange (30). The stator (1) is fluid-tightly enclosed by stainless steel. The bottom flange (30) consists at least partly of a material having a higher thermal conductivity than stainless steel. The stator (1), together with the bottom flange (30), is enclosed by a casing (40) made of stainless steel which is in thermal contact with the bottom flange (30) and encloses the bottom flange (30) and the stator (1) in common. The stator (1) is a tubular stator (1) having drive coils (12) arranged therein and also having a longitudinal axis and a through-hole (11) which extends through the tubular stator (1) coaxially with the longitudinal axis.

Abstract: A driving mechanism for driving an optical element is provided, including a holder unit, a base unit, and a magnetic element. The holder unit is used to hold the optical element, and the base unit includes a metal substrate and a circuit structure formed on the metal substrate, wherein the circuit structure includes a driving coil. The magnetic element is disposed on the holder unit and corresponds to the driving coil for driving the optical element to move relative to the base unit.

Abstract: A camera module shielded against electromagnetic interference but of reduced size comprises a voice coil motor, a circuit board, and a base between voice coil motor and circuit board. The voice coil motor comprises conductive housing. The circuit board comprises a conductive wire itself comprising shielded wire, ground pad, and a surrounding and grounded closed ground loop. The base comprises a main body and a conductive loop sleeved thereon. A first side of the conductive loop is electrically connected to the conductive housing, a second side of the conductive loop is electrically connected to the closed ground loop. The conductive housing, the conductive loop, and the closed ground loop form a shield against electromagnetic interference. The disclosure further provides an electronic device including the camera module.

Abstract: A switching element control circuit includes: a third electrode voltage control part which controls a third electrode voltage; a first electrode current detection part which detects a first electrode current which flows through the switching element; a memory part which stores information including an initial threshold voltage and an initial first electrode current, and a drain current characteristic of a threshold voltage; and a threshold voltage calculation part which calculates a threshold voltage at a time of operating the switching element based on information including the first electrode current, the initial threshold voltage, and an initial first electrode current, and information relating to the first electrode current characteristic of the threshold voltage, wherein the third electrode voltage control part controls the third electrode voltage based on a threshold voltage at the time of operating the switching element calculated by the threshold voltage calculation part.

Abstract: A semiconductor switch control circuit configured to perform an ON/OFF control of a semiconductor switch and includes: a pulse signal generating part configured to generate a pulse signal; a drive current generating part configured to generate a drive current based on the pulse signal which the pulse signal generating part generates and supplies the drive current to a gate electrode of the semiconductor switch; a gate voltage detecting part configured to detect a gate voltage VGS of the semiconductor switch; and a drive current control part configured to control the drive current which the drive current generating part generates based on the pulse signal which the pulse signal generating part generates and the gate voltage VGS which the gate voltage detecting part detects.

Abstract: A driving circuit for driving a synchronous rectifier device. The driving circuit may include a controllable charging circuit and a slope sensing circuit. The slope sensing circuit may sense whether an abrupt rising change in a voltage drop from a sensing terminal to a reference ground terminal of the driving circuit is occurring, and provide a slope sensing signal in response to a rising edge of the abrupt rising change in the voltage drop. The controllable charging circuit may receive the slope sensing signal and provide a charging current to a supply terminal of the driving circuit in response to each rising edge of the abrupt rising change in the voltage drop.

Abstract: A signal processor is configured to perform a process equivalent to performing a series of fixed-to-rotating coordinate conversion, a predetermined process and then rotating-to-fixed coordinate conversion, while maintaining linearity and time-invariance. The signal processor performs a process given by the following matrix G: G = [ F ? ( s + j ? ? ? 0 ) + F ? ( s - j ? ? ? 0 ) 2 F ? ( s + j ? ? ? 0 ) - F ? ( s - j ? ? ? 0 ) 2 ? j - F ? ( s + j ? ? ? 0 ) - F ? ( s - j ? ? ? 0 ) 2 ? j F ? ( s + j ? ? ? 0 ) + F ? ( s - j ? ? ? 0 ) 2 ] where F(s) is a transfer function representing the predetermined process, ?0 is a predetermined angular frequency and j is the imaginary unit.

Abstract: A power converter and method for improving the current control stability of power converter by balancing the secondary winding currents is provided herein. The power converter includes a primary circuit having switches controllably driven at an operating frequency to produce an AC output through a primary transformer winding, and a secondary circuit having first and second secondary windings having respective leakage inductances. The secondary circuit provides power at an output node based on a power transfer between the primary winding and the first and second secondary windings. At least one balance inductor is coupled in series with the first and second secondary windings, and configured to reduce a difference between the first leakage inductance and the second leakage inductance. The at least one balance inductor may further be configured to reduce a difference between first and second AC current peaks associated with the first and second secondary windings, respectively.

Abstract: A circuit is described for powering a chime that outputs audio in response to detection of an entity by a video doorbell. The circuit includes a rectifier circuit configured to generate a first signal based on a power source and a first switch coupled to the rectifier circuit. The first switch is configured to provide, based on the first signal, a first DC voltage signal during a first operating mode where the doorbell receives input that triggers actuation of the chime in response to detection of the entity. The circuit includes a second switch coupled to the rectifier circuit and the first switch. Based on the first signal, the second switch provides a second DC voltage signal during a second operating mode where the chime outputs the audio based on the input that triggers actuation of the chime in response to detection of the entity.