Abstract: A novel automobile charger comprises a direct current (DC) voltage supply, wherein a positive pole of the (DC) voltage supply is connected with a first end or a first lead of a DC-to-DC module, a first end of a battery voltage detection module and a first end of a load module simultaneously, while a negative pole of the DC voltage supply is connected with a second end of the DC-to-DC module, a first end of a microcontroller, a first end of an automobile start control module and a second end of the battery voltage detection module simultaneously. A third end of the DC-to-DC module is connected with a second end of the microcontroller. Third, fourth and fifth ends of the microcontroller are connected with a third end of the battery voltage detection module, a second end of the automobile start control module and a first end of a load detection module respectively.

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: The present disclosure is directed to systems and methods for economically optimal control of an electrical system. Some embodiments include an input device to receive input from a user. The site information may include an indication from the user of a site participation preference for a response event for an aggregation opportunity.

Abstract: This technology refers to a control process for low voltage microgrids with distributed communication, the process is based on two techniques: “Power-Based Control” (PBC) and “consensus protocol” (CP). The proposed technology resorts to PBC and CP techniques to take advantage of the combination of their technical features, achieving a low implementation complexity and concomitantly providing the following technical effects: 1) precise sharing of active power and reactive power proportionally to the capacity of distributed generators (GDs) at the MR; 2) control of the flow of active power and reactive power between the different phases of the MRs; 3) Current unbalance compensation at the point of common coupling (PAC); in addition to other advantages. The technology is applied in the technical field of equipment and infrastructure for microgrids (MRs) of distributed generators (GDs).

Abstract: An electrical distribution grid energy management and router device, or GER device, may be installed in a distribution grid, and route power from power supply to one or more power consumers. The GER devices described herein may provide platforms to add one or more features to a distribution transformer, provide additional features and benefits to both the utility company and end consumer, and may serve as a platform for providing other features, such as multi-layer protection systems for detecting, among other things, one or more fault conditions, and responding to such conditions when detected. A GER device may include sensors to measure electrical properties of incoming and outgoing power, and may include an electrical circuit layer having a central DC power stage.

Abstract: A power plant is configured to output power to a grid power system and comprises a hydrogen generation system configured to produce hydrogen, a gas turbine combined cycle power plant comprising a gas turbine engine configured to combust hydrogen from the hydrogen generation system to generate a gas stream that can be used to rotate a turbine shaft and a heat recovery steam generator (HRSG) configured to generate steam with the gas stream of the gas turbine engine to rotate a steam turbine, a storage system configured to store hydrogen produced by the hydrogen generation system, and a controller configured to operate the hydrogen generation system with electricity from the grid power system when the grid power system has excess energy and balance active and reactive loads on the grid power system using at least one of the hydrogen generation system and the gas turbine combined cycle power plant.

Abstract: A power plant is configured to output power to a grid power system and comprises a hydrogen generation system configured to produce hydrogen, a gas turbine combined cycle power plant comprising a gas turbine engine configured to combust hydrogen from the hydrogen generation system to generate a gas stream that can be used to rotate a turbine shaft and a heat recovery steam generator (HRSG) configured to generate steam with the gas stream of the gas turbine engine to rotate a steam turbine, a storage system configured to store hydrogen produced by the hydrogen generation system, and a controller configured to operate the hydrogen generation system with electricity from the grid power system when the grid power system has excess energy and balance active and reactive loads on the grid power system using at least one of the hydrogen generation system and the gas turbine combined cycle power plant.

Abstract: A terminal wireless charging cradle may comprise a body disposed horizontally, a recess formed to be stepped downward from an upper surface of the body, a supporter having a wireless charging circuit built therein and movable between a first position laid down in the recess and a second position erected to protrude upward from the recess, a pair of guide grooves formed in both inner surfaces of the recess, and a plurality of protrusions protruding from both lower sides of the supporter into the pair of guide grooves and sliding along the pair of guide grooves when the supporter moves.

Abstract: A wireless charging stand for a mobile device, including a foldable frame with a base panel extending generally in a first plane and an upper panel extending generally in a second plane. The base panel and the upper panel are connected by a hinge such that the base panel and the upper panel can be folded flat with the upper panel against and overlying the base panel and the first and second planes generally parallel. The upper panel also includes a wireless charger and a magnetic mounting system. The stand includes a suction cup secured to a lower surface of the base panel to releasably mount the wireless charging stand to an environmental surface.

Abstract: A charging device is provided in the disclosure. The charging device can include a first housing, a second housing, a charging assembly, and a holder. The second housing is rotatably connected to the first housing and configured to hold an electronic device. The charging assembly is received in the second housing and configured to charge the electronic device. The holder is rotatable relative to the first housing and rotatable along with rotation of the second housing, and the holder is configured to switch between an extending-out state where a portion of the holder extends out of the first housing and a receiving state where the portion of the holder is received in the first housing.

Abstract: A charging device and an electronic device assembly are provided. The charging device may include a first housing, a second housing defining a receiving space, and a driving assembly and a charging coil. The second housing is rotatably connected with the first housing. The second housing is configured to hold an electronic device. The driving assembly and the charging coil are both received in the receiving space. The driving assembly is connected with the charging coil and configured to drive the charging coil to move in the receiving space. In addition, in the disclosure, movability of the charging coil can be utilized to adjust position of the charging coil, thereby adapting to different models and states of the electronic devices and improving charging efficiency of the charging device.

Abstract: A control system for a secondary battery that effectively performs temperature control of the secondary battery before getting to a charging station, thereby enabling high speed charging, is provided. It relates to a vehicle including a first secondary battery, a second secondary battery, a first temperature control unit, a secondary battery monitoring unit, and an arithmetic unit. The secondary battery monitoring unit acquires remaining amount data of the first secondary battery. The arithmetic unit compares the remaining amount data and a set value. In the case where the remaining amount data is smaller than the set value, the secondary battery monitoring unit acquires the temperature of the first secondary battery. The arithmetic unit calculates an adjustment term required to adjust the temperature of the first secondary battery to a set temperature. The arithmetic unit calculates an arrival term required to get to a set charging station.

Abstract: The present invention provides a control method of an electronic device, wherein the control method includes the steps of: enabling a wireless charging mode; generating a packet, wherein the packet comprises content that is not recognized by other electronic devices to issue an acknowledgement; and wirelessly transmitting the packet, and continuously retransmitting the packet.

Abstract: A wireless charging receiver and wireless charging system comprising the same is provided. A wireless charging receiver may be configured to wirelessly receive electrical power from a wireless charging transmitter. The wireless charging receiver may include an inductor inductively coupled to the wireless charging transmitter, a rectifier connected to the inductor and configured to rectify a signal received from the inductor, a DC-DC converter configured to convert a DC signal received from the rectifier, a switching block configured to receive a common voltage generated from the DC-DC converter and including a first switch, and a first capacitor configured to receive the common voltage from the switching block and connected to the inductor at a first node n1, wherein the common voltage is not zero (0).

Abstract: The disclosure provides a battery pack, a tool system, a charging system, an adapter and using methods thereof. The battery pack comprises a battery assembly, a charging assembly and a discharging assembly. The charging assembly matches the battery assembly to charge the battery assembly by an external power source. The discharging assembly matches the battery assembly to supply power to the electric equipment through the battery assembly. The discharging assembly comprises a discharging coil and a discharging integration module matched with the discharging coil, so that the battery assembly outputs electrical energy through the discharging assembly in a non-contact manner.

Abstract: This disclosure provides systems, methods, and apparatuses for wireless power transmission. Various implementations of this disclosure relate generally to intermittent wireless charging. A wireless power transmission apparatus (such as a charging pad or surface) can intermittently provide wireless power to one or more wireless power reception apparatuses based on time slices. The wireless power reception apparatuses can cool during time slices in which wireless power is not transferred. A power control unit of the wireless power transmission apparatus may determine first time slices during which wireless power will be provided to the wireless power reception apparatus. The power control unit also may determine second time slices during which wireless power will not be provided to the wireless power reception apparatus, where the second time slices are interspersed with the first time slices allowing time for thermal loads that accumulated during the first time slices to dissipate.

Abstract: A wireless power transfer and docking station and methods are provided for wirelessly charging or powering a portable device and automatically connecting to external peripheral devices. The station comprises at least one wireless-power transmitter for transmitting power and identification-related information, and at least one wireless-power receiver, connected to the portable device, for exchanging the power and the identification-related information to the portable device. The methods comprise pairing the at least one wireless-power transmitter with the at least one wireless-power receiver when the portable device is placed in a charging zone of the at least one wireless-power transmitter, exchanging the identification-related information for automatically and wirelessly connecting to the external peripheral devices, and attempting connecting to the external peripheral devices.

Abstract: A wearable electronic device includes a lens, an inductive coil positioned around the lens, a storage device, and a transceiver. The inductive coil wirelessly charges the wearable electronic device and provides a data interface to send and receive wireless data signals. The storage device stores settings of the wearable electronic device and software that controls the wearable electronic device. The transceiver transmits an identifier of the wearable electronic device and receives a software update for the wearable electronic device, the software update based on the identifier of the wearable electronic device.

Abstract: A power transmitting device includes a power transmission unit using contactless power supply, processing circuitry configured to switch a power transmission mode of the power transmission unit between a normal output mode and a limit mode, and a transmission-side communication unit configured to execute communication with a power receiving device. The processing circuitry is configured to determine whether the power receiving device is a registered power receiving device based on information related to the power receiving device obtained from the transmission-side communication unit, determine whether the registered power receiving device is located inside a power transmission range of the power transmission unit, set the power transmission mode to the normal output mode when determining that the registered power receiving device is located inside the range, and set the power transmission mode to the limit mode when determining that the registered power receiving device is not located inside the range.

Abstract: A stator composed of package of plates rotated symmetrically, in multiples or divisors of 120° and also multiple of 3, contributing to the construction of an electromagnetically symmetric stator, preferably providing the symmetry between the phases of the three-phase motor, in a second plan, the technical effects of a reduction of scrap waste in the stamping process of these plates, and the increase of the heat exchange area for internal cooling for any type of electric motor using this stator. The stator (1) has a plurality of packages of plates (2), each of the packages of plates rotated symmetrically in relation to the subsequent package of plates in the longitudinal radial direction (L).

Abstract: The disclosure provides, in one aspect, an electric motor comprising a stator and a rotor assembly including a rotor body and a pinion gear integrally formed as a single piece with the rotor body.

Abstract: A segmented stator for a generator, in particular for a wind turbine is provided. The stator includes at least one stator segment comprising teeth and slots, in which coil windings are inserted, wherein the teeth extend from a yoke of the stator in a radial direction of the stator, wherein the stator segment has an end in a circumferential direction of the stator with an open slot, into which an end coil winding is arranged, and the stator segment at least one duct; a strap which extends at least partly at or along the end coil winding and in the duct and fixes the end coil winding to the stator segment; and a recessed component having a recess or a guide which guides the strap into the duct.

Abstract: A stator for a rotary electric machine includes: (a) a stator core; (b) a coil wound on the stator core; (c) a conductive member including: a main line portion that is electrically connected in a longitudinal end portion thereof with an external member; and first and second branch line portions that are branched from a branch portion located on a side of another longitudinal end portion of the main line portion, such that the first branch line portion is connected to the coil through a connection portion; and (d) a resin portion that seals at least a part of a coil end of the coil and at least a part of the second branch line portion.

Abstract: Disclosed is a fan motor and a hair dryer comprising same, the fan motor having heat-dissipating holes for discharging heat from inside the fan motor. Heat-dissipating channels are provided in the space between the inner circumferential surface of a stator assembly and two adjacent teeth, and a plurality of heat-dissipating holes penetrate the top of a vane hub, wherein the heat-dissipating holes overlap unidirectionally with any one of the heat-dissipating channels.

Abstract: A rotor of an electric machine comprising a drive shaft, a plurality of foils provided with an insertion seat at which they are coaxially keyed to the drive shaft at a keying portion. The foils have the shape of a circular sector extending from an outer edge, corresponding to an outer diameter of the rotor, and an inner edge, corresponding to a minimum or inner diameter delimiting the insertion seat which interfaces with the keying portion of the drive shaft. The keying portion includes a lateral surface which interfaces with the insertion seat of the foils. The foils include cavities passing through an axial thickness of the foil, which impart elasticity in a radial direction, perpendicular to the rotation axis, to blocking portions of the foils. The blocking portions include a central block, having a central radial thickness, and two lateral blocks, having an intermediate radial thickness and an end radial thickness which are lower than the central radial thickness of the central block.

Abstract: The present disclosure discloses a rotor of an induction motor comprising a rotor body (1), alternating rotor teeth (2) and rotor slots (3) arranged along a circumference of the rotor body (1), and a plurality of grooves (4) provided at an end of the rotor teeth (2) or a plurality of voids (5) provided within the end of the rotor teeth (2) that are provided symmetrically about a center line (10) of the rotor teeth (2). The rotor and the induction motor having the rotor of the present disclosure can, for example, reduce the radial force of the stator caused by the slotting effect by about 50%. Therefore, the user's comfort can be greatly improved, while the efficiency of the induction motor can be improved, and the life of the induction motor can be prolonged.

Abstract: A flux machine includes a stator and a rotor. A set of electrical coil assemblies with side surfaces and sets of plural permanent magnets are arranged circularly on the stator and the rotor. Pole faces of the magnets are positioned adjacent to and spaced apart from side surfaces of permeable cores of the coil assemblies. In each coil assembly a pair of like pole faces of the magnets mutually face across the permeable core and a third magnet pole face faces transversely relative to the mutually facing pole faces of the pair of magnets.

Abstract: A rotor for a permanent magnet synchronous machine includes a laminated core having recesses in which respective permanent magnets are received. Each recess has a first end region which is closer to an axis of rotation of the rotor than a second end region. The permanent magnets are arranged in recesses which are adjacent to one another and of which the first end regions are closer to one another in the circumferential direction of the rotor than the second end regions. This arrangement is such that similar poles of the permanent magnets face one another. The rotor has a holding part by way of which a first portion of the laminated core is coupled to a second portion of the laminated core. The holding part has a lower magnetic conductivity than a subregion of the laminated core, the volume of which is equal to a volume of the holding part.

Abstract: According to one embodiment, a first region surrounded by a bridge inner circumferential edge, a bridge center line, a circumscribed circle of a rotor core, and an inner wall of a first magnet hole and a second region surrounded by the bridge inner circumferential edge, the bridge center line, the circumscribed circle of the rotor core, and an inner wall of a second magnet hole are asymmetrical with respect to a d-axis, and the rotor core has a structure satisfying the following equation.

Abstract: The present invention may provide a motor including a shaft, a rotor coupled to the shaft, and a stator disposed to correspond to the rotor, wherein the rotor includes a rotor core and magnets coupled to the rotor core, the magnets include a first unit magnet disposed on an outer circumferential surface of the rotor core in a circumferential direction and a second unit magnet disposed adjacent to the first unit magnet, the first unit magnet includes a first surface facing the rotor core and a first curved surface facing the stator, the second unit magnet includes a second surface facing the rotor core and a second curved surface facing the stator, a length of the first surface in the circumferential direction is different from a length of the second surface in the circumferential direction, and a radius of curvature of the first curved surface is different from a radius of curvature of the second curved surface.

Abstract: In some embodiments, the present invention may include, for example, systems, devices, and methods for power generation using a permanent magnet and/or an electro magnet installed on a twisted band wheel or wheels and/or installed on stationary discs and plates. Due to magnetic field forces for example between the stationary discs and the twisted band, the twisted band may be driven to move (e.g., rotate), rotation of the twisted band is optionally transferred by an axle to a generator.

Abstract: An axial flux electric machine comprises a stator including a plurality of stator core segments each comprising a lamination comprising a plurality of layers. A first soft magnetic composite (SMC) portion is arranged adjacent to the plurality of layers of the lamination. An insulating layer arranged between circumferential side surfaces of the plurality of layers of the lamination and the first SMC portion. A rotor is arranged axially adjacent to the stator and including a plurality of permanent magnets. The rotor and stator are configured to generate magnetic flux that is aligned parallel to an axis of rotation of the rotor.

Abstract: A rotor shaft (100) for a rotor (132), in particular for an electric machine (130), wherein the rotor shaft (100) has a base shaft (102), and wherein a rotor shaft seat (106) for a plate stack (108) is formed on an outer lateral surface (114, 116) of the rotor shaft (100) in the area of the base shaft (102), wherein the rotor shaft (100) comprises a conical sleeve (104), wherein a lateral surface (110) of the base shaft (102) facing the conical sleeve (104) comprises a conical shape which runs opposite to a conical shape of the lateral surface (112) of the conical sleeve (104) facing the base shaft (102). Furthermore, a corresponding rotor and a corresponding electric machine are disclosed, as well as a method for manufacturing such a rotor shaft (100).

Abstract: An object of the present invention is to provide a rotary electric machine in which damage of a magnet is suppressed and cooling performance of the magnet is improved. The present invention includes a rotation shaft 21, a rotor 20, and core end members 204 and 205 connected to end portions of the rotor 20. The rotor 20 includes a magnet 201, a rotor core 200, and interposed members 301a and 301b interposed between the magnet 201 and the rotor core 200. In the rotor core 200, a magnet insertion hole 202 for disposing the magnet 201 and flux barriers 203a and 203b are formed. The rotation shaft 21 is provided with a first flow path 21a through which a refrigerant flows. The core end members 204 and 205 are provided with a second flow path 504a joining the first flow path 21a and the flux barrier 203a.

Abstract: An electric motor includes a shaft supported rotatably around a rotation axis, a rotor rotatable integrally with the shaft, a stator, and first and second retaining members to hold the rotor therebetween in an extending direction of the rotation axis. The rotor includes a stack of thin plates arranged in the extending direction of the rotation axis and including identically-shaped through holes. The through holes define air passages penetrating the rotor in the extending direction of the rotation axis. The first and second retaining members respectively include first and second through holes in communication with the air passages. The radially outermost portions of the walls of the first through holes are located radially inward from the radially outermost portions of the walls of the second through holes.

Abstract: An electric machine includes an active part having a slot, and a slot seal for sealing the slot. The slot seal includes a duct for guiding a fluid and an aperture configured to open the duct to an air gap of the electric machine and forming a nozzle designed to enable a phase change of the fluid.

Abstract: A stator includes a stator core and three-phase coils attached to the stator core by distributed winding. The three-phase coils include 6×n U-phase coils, 6×n V-phase coils, and 6×n W-phase coils in a coil end. The 6×n U-phase coils, the 6×n V-phase coils, and the 6×n W-phase coils each include 2×n sets of coil groups each including a set of first to third coils. Each of the first to third coils is disposed in the stator core at two-slot pitch. A part of the third coil is disposed in the slot in which a part of the second coil is disposed.

Abstract: A dynamo electric machine stator which is easy to assemble, includes a stator body with stator grooves and a winding mat with groove sections arranged in the stator grooves and lie one over the other in different radial positions, and with head sections which connect the groove sections. A wave winding conductor changes position by precisely one radial position in the stator grooves in the center of the extension of the wave winding conductor in the winding direction. The winding mat includes a first sub-winding mat with one first set of wave winding conductors for each section, the first sets being joined together in an X-shaped manner in the region of the position change such that the conductors are aligned in a specific manner at the intersections between the wave winding conductors.

Abstract: An electrical insulator assembly includes first insulators (200A) and second insulators (200B) that can be fitted onto teeth (121) of a stator core (110) of an electric motor in an alternating manner. Each of the first insulators has a first flange (210), a second flange (220) and a body (230). Each of the second insulators has a first flange (210), a second flange (400) and a body (230). The second flange of the first insulators has first and second overlapping parts (220E, 220F) on opposite circumferential sides. The second flange of the second insulators has first and second overlapping parts (400E, 400F) on opposite circumferential sides. The first overlapping parts (220E) of the first insulators radially overlap the second overlapping parts (400F) of the second insulators, and the second overlapping parts (220F) of the first insulators radially overlap the first overlapping parts (400E) of the second insulators.

Abstract: A slot wedge of a dynamoelectric machine which includes a stator having axially extending slots and a winding system disposed in the slots, is configured to cover a corresponding one of the slots in a direction of an air gap and includes a first layer, and a second layer arranged in spaced-apart to the first layer at least in one section to form a flow channel between the first and second layers. The second layer can have a perforation with a different density of holes per unit area, with the density of the holes being greater in a central area of the second layer and/or a perforation having holes defined by a diameter which is greater in a central area of the slot.

Abstract: A motor vehicle electric motor assembly includes a motor housing having an annular wall extending from a housing first end to an opposite housing second end about a central axis to bound a cavity. The housing first end has a base configured to support a bearing housing. A motor shaft extends along the central axis between a shaft first end and a shaft second end. A rotor is fixed to the shaft for rotation about the central axis. A stator is supported by the annular wall in radially spaced relation from the rotor. A bearing is fixed in the bearing housing to support the shaft first end for rotation about the central axis. An end cover assembly is fixed to the housing second end. The end cover assembly has a motor shaft opening with a periphery of the motor shaft opening supporting the shaft second end for rotation about the central axis.

Abstract: A hydraulic pressure control device includes an electric motor including a motor main body portion, a conductive portion connecting a cavity of a substrate and the motor main body portion, and a covering portion covering a part of the conductive portion; a housing in which a through-hole for accommodating the covering portion is formed; a cap having a terminal insertion hole through which a motor terminal, which is a distal end portion of the conductive portion exposed from the covering portion, is inserted, and being fitted into the through-hole; and a seal member which is a cured product of a liquid sealing agent disposed between the cap and the covering portion to close the through-hole.

Abstract: The invention relates to an electric drive unit (10), in particular for a vehicle or motor vehicle, comprising an electric machine (12) and a transmission (14). The electric machine (12) is accommodated in a drive housing (18), and the transmission (14) is accommodated in a transmission housing (20), wherein the interior (19) of the drive housing (18) and the interior (21) of the transmission housing (20) are separated by a bearing wall (22), and at least one cooling channel (24) for cooling the electric machine (12) is formed on or in the drive housing (18). The electric drive unit (10) has an insert (26) which is designed and arranged such that a cavity (28) is produced in the drive housing (18) between the bearing wall (22) and the insert (26), and the cavity (28) is fluidically connected to the cooling channel (24). The invention also relates to a vehicle comprising a corresponding electric drive unit (10).

Abstract: A cooling device for an electric motor that includes (i) a stator including a stator core and a stator coil, and (ii) a rotor. The electric motor is located in a position adjacent to a resolver in a direction of the rotation axis. The resolver includes a resolver stator, a resolver rotor and a resolver coil. The cooling device includes (a) a refrigerant supply mechanism and (b) an oil guide which is provided in an annular-shaped cover covering the resolver coil, for supplying a refrigerant supplied from the refrigerant supply mechanism onto a lower portion of a coil end of the stator coil. The oil guide includes a guide wall which extends in the direction of the rotation axis and in a circumferential direction of the annular-shaped cover. At least a portion of the guide wall overlaps with the coil end as seen from a radial direction.

Abstract: A rotating electric machine cooling frame according to an embodiment includes: a cylindrical frame main body; one cooling-medium inlet provided on the frame main body; one cooling-medium outlet provided on the frame main body; and a plurality of flow-passage lines provided in the frame main body, including a cooling-medium flow passage in communication with the cooling-medium inlet and the cooling-medium outlet.

Abstract: A motor shaft includes a first shaft portion, a second shaft portion, a hollow intermediate shaft portion, a first connecting portion connecting the first shaft portion to the intermediate shaft portion, and a second connecting portion connecting the second shaft portion to the intermediate shaft portion. The intermediate shaft portion has an outer diameter larger than outer diameters of the first and second shaft portions and supports a rotor core on an outer circumference thereof. The motor shaft is configured to include a first member integrally formed to include the first shaft portion and the first connecting portion and a second member integrally formed to include the second shaft portion and the second connecting portion. At least one of the first connecting portion and the second connecting portion is provided with an outer flange that protrudes radially outward from an outer circumferential surface of the intermediate shaft portion.

Abstract: A rotor including a shaft, and a rotor core fixed on an outer circumferential surface of the shaft, with a key portion provided in an inner circumferential surface of the rotor core being fitted in a keyway provided in the outer circumferential surface of the shaft. The key portion includes an opposed part opposed to the keyway, wherein the opposed part is constituted by a core bottom portion, a core inclined portion and a core curved portion of the inner circumferential surface of the rotor core, which are contiguous in a circumferential direction of the rotor core. The core inclined portion and a shaft inclined portion of the outer circumferential surface of the shaft are in contact at with each other. The core curved portion and a shaft curved portion of the outer circumferential surface of the shaft cooperate to define a clearance in a radial direction of the rotor.

Abstract: A power tool includes a resin member in a rotor that is less susceptible to breaking. A power tool includes a stator, a rotor rotatable relative to the stator at a speed of 30000 rpm or greater, and an output unit drivable by the rotor. The stator includes a stator core, an insulator fixed to the stator core, and a coil held on the insulator. The rotor includes a rotor core having a slot, a permanent magnet received in the slot in the rotor core, and a resin member fixing the rotor core and the permanent magnet. The resin member includes an annular portion protruding from an end face of the rotor core. The annular portion includes a cut portion.

Abstract: A linear electro-mechanical actuator assembly includes a linear actuator having an output rod end, and a bell crank assembly having a bell crank that is rotatable around a central axis and that has a rod connection opening for receiving the rod end. The bell crank further includes a tube opening along the central axis for receiving a torque tube. First and second bearing plates are positioned on opposite sides of the bell crank, whereby the bank crank rotates relative to the first and second bearing plates. A connection pin provides a hinge connection of the rod end to the bell crank such that linear motion of the rod end imparts rotational motion to the bell crank. The bell crank includes bearing supports positioned on opposite sides of the bell crank body. Circular bearings are positioned within the bearing plates, and around the bearing supports, to support the rotational motion of the bell crank.

Abstract: A power supply circuit supplies a current from a DC voltage source to first and second actuator coils to support an object in a non-contact manner by electromagnetic force. The power supply circuit includes a first leg connected to the DC voltage source, and a control unit. The first leg has first upper and lower arm switching elements connected in series. The control unit turns the switching elements on and off to control the current supplied to the actuator coils. A midpoint between the switching elements is connected to a connection point between the actuator coils. A freewheeling diode is provided for each of the switching elements in parallel. The control unit performs control so that the current flows through the first actuator coil in a direction toward the connection point, and the current flows through the second actuator coil in a direction coming out of the connection point.