Abstract: Aspects of the present invention relate to an apparatus and method for detecting foreign objects in a wireless power transmission system. This specification provides a wireless power reception apparatus for detecting foreign objects, including a power measurement unit for generating required power information indicative of required power for the wireless power reception apparatus, sending the required power information to a wireless power transmission apparatus, and measuring power induced from the wireless power transmission apparatus and a secondary coil for receiving the power induced from the wireless power transmission apparatus. In accordance with the present invention, foreign objects intervened between the wireless power transmission apparatus and the wireless power reception apparatus are recognized, and a user removes the foreign objects. Accordingly, damage to a device attributable to foreign objects can be prevented.

Abstract: The invention relates to an arrangement and a method for contactless energy transmission by means of induction. There are a plurality of coils arranged in a matrix, the coils having at least one conductor that surrounds a central axis of the coil at least once in one turn. The central axis stands vertically on the surface surrounded by the conductor in the geometric center of area of the surrounded surface. The coils are arranged adjacent to one another in a planar unit that extends in a first dimension, in a second dimension, and in a third dimension. The extension of the planar unit in the first dimension and in the second dimension is significantly greater than in the third dimension. The central axis of each coil stands at least locally at least nearly perpendicular to the surface spanned by the first dimension and the second dimension. The coils are also arranged in a regular manner within the planar unit in rows and/or columns such that each coil has at least two or three immediately adjacent coils.

Abstract: AC power having a power transmission frequency is transmitted from a resonant coil in a power transmission device to a resonant coil in a power reception device. Moreover, communication is conducted between a communication device in the power transmission device and a communication device in the power reception device through wireless radio wave having a communication frequency. The power transmission frequency and the communication frequency are determined in such a way that the relationship between the power transmission frequency and the communication frequency is a non-integer multiple.

Abstract: A device for controlling the polarity of a microphone of a portable terminal includes: a microphone that includes a current control element that is connected between a first polarity terminal and a second polarity terminal; first and second connection terminals that are connected to the first polarity terminal and the second polarity terminal of the microphone; a control unit that detects the level of at least one of the first and second connection terminals and determines whether the polarity of the microphone has been normally connected; a codec that is connected to a first polarity terminal and a second polarity terminal and codes audio signals; and a polarity adjusting unit that is connected between the first and second connection terminals and the first and second polarity terminals of the codec, and switches the outputs of the first and second connection terminals under the control of the control unit in the case of an abnormal connection, so as to be connected to the codec to align polarity.

Abstract: An electronic circuit includes an electronic switch having a control terminal and a load path. A monitoring circuit includes a switched-capacitor circuit with a capacitive storage element. The switched-capacitor circuit is coupled to the load path of the electronic switch. The monitoring circuit is operable to evaluate a load voltage of the electronic switch and to generate a failure signal dependent on the evaluation. A drive circuit is operable to provide a drive signal at the control terminal of the electronic switch dependent on the failure signal.

Abstract: An electric hand-held power tool includes at least one electrical drive, at least one electrical device that requires electrical energy in order to operate, a shut-off delay device for the electrical drive and/or the electrical device, at least one rechargeable battery for supplying electrical energy to the drive and the electrical device and an exhaustive-discharge safeguard device. The exhaustive-discharge safeguard device specifies the delay time (?t) of the shut-off delay device as a function of the state of charge of the rechargeable battery it has determined.

Abstract: A linear actuator includes an inner core, and an outer core that is provided outside the inner core in a radial direction while being supported by a pair of flat springs. Permanent magnets are formed at one of the inner core and the outer core, and magnetic pole portions are formed at the other of the inner core and the outer core to face the permanent magnet with predetermined gaps formed therebetween. Spacers are respectively provided between the inner core and the flat springs, abutting portions are respectively configured by abutting facing surfaces of the spacers and the inner core and facing surfaces of the spacers and the flat springs adjacent to the spacers in the axial direction, and a plurality of engagement portions including recesses and protrusions are arranged at the abutting portions.

Abstract: An actuator having a drive element which is made of a magnetic shape memory material, can be driven in response to electrical control of a plurality of coil apparatuses (10, 12) and is designed to carry out an expansion movement in response to said control, wherein the coil apparatuses are magnetically connected to the drive element (14) via flux-concentrating means (20, 22, 24, 26, 28, 30), and a flux-concentrating section of the flux-concentrating means is associated with the coil apparatuses for interaction with the drive element.

Abstract: A method for insulating a motor/generator coil includes providing a thermoplastic copolymer material in liquid form and applying a coating of the thermoplastic copolymer to the motor/generator coil in a thickness sufficient to withstand a predetermined minimum voltage threshold.

Abstract: In an electric power tool in which an electric motor is mounted in a housing that has a half-split structure, positions of middle screw fastening portions when a left housing and a right housing are fixed to each other by screws are located between a front protruding coil portion and a rear protruding coil portion. In other words, the protruding coil portions are located on either the front side or the rear side of the position of middle screw fastening portions when the left and right housings are fixed to each other by the screws. Accordingly, it is possible to effectively utilize a dead space that is likely to be formed between the front protruding coil portion and the rear protruding coil portion.

Abstract: An electrical machine including a stator and a rotor assembly. The rotor assembly defines a rotational axis and has a rotor core wherein the rotor core defines first and second axial end surfaces. A balance ring is rotationally fixed to the rotor assembly and is configured to rotationally balance the rotor assembly. The balance ring comprises an electrically conductive and magnetically permeable material and is disposed proximate the first axial end surface and defines an air gap disposed axially between the balance ring and the first axial end surface. In some embodiments, the electric machine includes a plurality of spacers extending between the first axial end surface and the balance ring. The rotor core and balance ring may comprise a plurality of stacked electrical steel laminations. The balance ring can be used to provide electromagnetic interference shielding for a resolver. A method of manufacturing an electric machine is also disclosed.

Abstract: The invention relates to a pole shoe of an electrical machine, in particular a rotor of an electrical generator of a wind turbine generator system, comprising a pole shoe body for conducting a magnetic field and for receiving a winding for conducting an electrical current, in particular an excitation current, for producing the magnetic field, and at least one heat sink, entirely or partially surrounding the pole shoe body, for cooling the pole shoe, wherein the heat sink is arranged between the pole shoe body and the winding.

Abstract: A stator for an electric machine having electrical windings surrounded by a casting compound, and fluid channels for cooling the electrical windings formed in the casting compound in close spatial proximity to the electrical windings.

Abstract: An electric machine housing includes a housing body having an outer surface provided with a plurality of materially integrally formed ribs defining a plurality of coolant channels. Each of the plurality of materially integrally formed ribs has an outer surface portion. A sleeve is provided on the housing body extending about the outer surface. The sleeve has an inner surface section that is matingly engaged with the outer surface portion of each of the materially integrally formed ribs.

Abstract: A motor with an air-cooling structure having high cooling efficiency and capable of avoiding an increase in the size of the motor. A stator of the motor has an air flow channel being formed in the stator near outer circumferences of the slots. Air conveyed from a fan motor collides with an inner surface of an end at a spindle side of the stator, while cooling the slots through the air flow channel. The flowing direction of air which collides with the housing is inverted by a redirecting part, and the air is returned to the fan motor side while cooling the outside of the stator.

Abstract: An electric motor configured to maximize active motive material within a given motor size by having one or more phase lead exit holes configured to prevent unwanted outside contaminants from entering the motor, phase leads each having an integral strain relief, and two or more Wye terminations that are not electrically connected to each other.

Abstract: A bus bar that can be manufactured easily as a part of an electric motor and, as a result, enables manufacturing the electric motor easily and inexpensively. The bus bar is configured to supply power to a plurality of coils of an electric motor and/or ground the coils in assemblage, in which a plurality of folded portions each of which includes three or a larger odd number of overlapping portions are formed on a conductor material having a predetermined length. The bus bar enables forming an insertion space at a predetermined position of each of the folded portions in which a terminal of each of the coils can be inserted so that each of the terminals is inserted into this insertion space and fixed in order to be electrically and directly fixed to the bus bar.

Abstract: A three-phase permanent magnet type motor has a stator in which a plurality of windings wound in a same direction are disposed, and the number of slots is 12n; a rotor in which the number of poles of the permanent magnet is 10n or 14n; and multilayer wiring boards for performing the connection so as to be 2m parallel. The three-phase permanent magnet type motor has a circuit configuration in which, among U-phase, V-phase, and W-phase, adjacent in-phase windings are connected in parallel and are connected in series with a like-pole winding of a symmetrical in-phase second winding group facing at 6-slot pitch angle, when a center of a first winding group of the adjacent in-phase windings is set as a reference axis, and in-phase transition wiring patterns are disposed on the same layer of the multilayer wiring boards in a line symmetrical manner.

Abstract: [Problem] A winding is provided which is so arranged that disengagement of a winding conductor is not caused after a winding around being finished.

Abstract: An actuating drive includes an electric motor and a gearing arranged in a housing which is open on one side and which is closed by a cover. The electric motor is mounted in a recess bulge of the housing which is substantially sealed off from the gearing. The configuration provides a precise positioning of the electric motor relative to a first axle, wherein a first gear of the gearing is assigned to the same and wherein the actuating drive can be manufactured more simply and more cost-effectively than was previously possible. This is achieved in that the electric motor is attached indirectly to the housing by means of an accordingly shaped metal sheet, and is positioned in a predetermined location with no radial or axial play.

Abstract: In a small power generator 1, a rotary dial 31 is disposed in the middle of the surface. By turning the rotary dial 31 with a finger, a rotor of an inner rotor type power generation unit 6, which is disposed inside the small power generator 1, is rotated by the rotational force through at least one intermediate gear. As a result, electric power is generated to charge a power supply for a portable electronic apparatus. The small power generator 1 includes an intermediate gear in order to transmit the rotational force of the rotary dial 31 to a rotating unit 3, and at least one of the shafts of the intermediate gear is provided between a plurality of core windings 67 circularly disposed in a stator core 66 of the power generation unit 6. Thus, in the small power generator 1, the planar size is reduced by providing the shaft of the intermediate gear inside the stator core of the inner rotor type power generator.

Abstract: There is provided a motor including: a sleeve rotatably supporting a shaft via a lubricating fluid; a base plate having the sleeve fixed thereto; a stator coupled to the base plate and including a core having a coil wound therearound in order to generate rotational driving force; and a rotor fixed to the shaft to be rotatable with respect to the stator and including a magnet facing the core, wherein the base plate includes a fixing part having the sleeve fixed thereto, an extension part extended from one end of the fixing part in an outer diameter direction, a seating part extended from one end of the extension part upwardly and downwardly in an axial direction, and a body part extended from the seating part in the outer diameter direction.

Abstract: A polyphasic multi-coil generator includes a drive shaft, at least first and second rotors rigidly mounted on the drive shaft so as to simultaneously synchronously rotate with rotation of the drive shaft, and at least one stator sandwiched between the first and second rotors. A stator array on the stator has an array of electrically conductive coils mounted to the stator in a first angular orientation about the drive shaft. The rotors each have an array of magnets which are circumferentially equally spaced around the rotor and located at the same radially spacing with respect to the centre of the rotor and the drive shaft at a first angular orientation relative to the drive shaft. The arrays of magnets on adjacent rotors are off-set by an angular offset relative to one another.

Abstract: A driving apparatus for a direct-drive type washing machine includes a support member that is fixed to the lower side of a washing tub; a dehydrating tub rotating shaft that is rotatably supported on the support member and that is connected to a dehydrating tub to rotate the dehydrating tub; a pulsator rotating shaft that is rotatably arranged in the inside of the dehydrating tub rotating shaft and that is connected to a pulsator to rotate the pulsator; a drive motor comprising a double rotor including an outer rotor that is connected to the pulsator rotating shaft and an inner rotor that is connected to the dehydrating tub rotating shaft, and a double stator including a first stator coil for rotating the outer rotor and a second stator coil for rotating the inner rotor; and a motor drive unit that generates alternating-current (AC) power according to a washing control signal.

Abstract: Magnet insertion holes for embedding a plurality of permanent magnets per pole are formed in a rotor core in a protruding shape toward a center of a rotor. A pair of flux control holes formed in a symmetrical shape with respect to a center line between magnetic poles is provided for each magnetic pole in a magnetic pole gap of the rotor core. Where d is a diameter of the respective flux control holes, m is a center-to-center distance thereof, b is a width of the magnetic pole gap, and ? is a pole pitch between magnetic poles, the flux control holes are provided so that a value of m/T obtained by standardizing the center-to-center distance m by the pole pitch ? satisfies 0.08<m/?<(b?2 d)/?.

Abstract: An electric rotating machine comprises a stator adapted for receiving stator windings; a rotor rotatable relative to the stator; permanent magnets in the rotor forming magnetic poles; and apertures with a low permeability. Each aperture is for that portion of one of the permanent magnets located in a predetermined range which would generate magnetic flux lines in such directions as to cancel magnetic flux lines emanating from the stator in the neighborhood of a direct axis of one of the magnetic poles if the permanent magnet were located in the predetermined range.

Abstract: A DC electric rotating machine, mainly for the starter of an automotive vehicle. The machine includes a stator including a wound structure forming a plurality of poles extending along the circumference of the stator, a rotor, and a set of brushes adapted for the electric supply of the rotor by commutation of the electric current in sections of the rotor. The wound structure of the stator includes a plurality of slots between two central parts of consecutive poles of the stator, these slots being formed in a magnetic body of the stator. At least one of the slots including at least one conducting segment forming a winding of an electrical coil.

Abstract: The present invention relates an electrical machine comprising a plurality of stator segments;each segment has a plurality of electrical phase windings embedded in stator slots in a phase sequence, wherein the phase of the first slot of a segment is different from the phase of the first slot of an adjacent segment.

Abstract: In an armature, a plurality of teeth extending from an annular core back each include a projection portion arranged to extend in a circumferential direction from a circumferential side surface of the tooth. Insulators, each of which is attached to the stator core and is arranged to cover at least a portion of a separate one of the teeth, include an insulator contact surface arranged to be in contact with the projection portion. A portion of the projection portion and the insulator contact surface are arranged to be in contact with each other.

Abstract: Hybrid rotor bar assemblies and electric motors having hybrid rotor bar assemblies are disclosed, as are other aspects. The hybrid rotor tar assemblies have rotor bars lined with shims. The rotor bars can be copper rotor bars. In certain aspects, the shim may be about one fourth to about one eighth of a thickness of the rotor bar. Also disclosed are electric motors with shims lining the rotor bars and functioning as secondary rotor bars.

Abstract: A wedge for use in an electric machine has a central leg extending in a direction that will be radially inward when the wedge is mounted on a lamination stack, The wedge has arms extending in both circumferential directions from the central leg, with a circumferentially outermost part of the arms having a curved surface that will be radially outward, and a flat inner surface that will be radially inward when the wedge in mounted in the lamination stack. A generator/motor rotor and a generator/motor are also disclosed.

Abstract: An electric motor includes a stator, a case surrounding the stator, and a rotor rotatably disposed with respect to the stator. The rotor includes a rotor core having a plurality of poles and slots, a shaft coupled to a central portion of the rotor core, a rotor coil wound on the rotor core, and coil supporting members provided at the rotor core. The coil supporting members are configured to support the rotor coil such that the rotor coil is prevented from being separated from the rotor core in a radial direction when the rotor rotates. Under such a configuration, a short-circuit of the rotor coil due to a centrifugal force when the rotor rotates, can be prevented.

Abstract: A stator core is formed by laminating a plurality of annular core plates one on top of another. The stator core includes a cylindrical yoke and a plurality of radially protruding teeth arranged at a specified interval along a circumferential direction of the yoke. Each of the core plates includes a plurality of annularly-arranged split cores each having a yoke portion forming the yoke and a tooth portion protruding from the yoke portion and forming the teeth. The yoke portion includes a first yoke section and a second yoke section extending different lengths at opposite lateral sides of the tooth portion.

Abstract: A method of manufacturing a stator core includes die-cutting iron core materials from a band-shaped magnetic steel sheet, each iron core material being formed into an annular shape and having m number of interconnecting lugs protruding radially outward from an annular outer circumference of the magnetic steel sheet when m is equal to or larger than 2, and stacking a number of the iron core materials. In the die-cutting, parts of the magnetic steel sheet to be die-cut as the iron core material are arranged in n number of rows in a widthwise direction of the magnetic steel sheet when n is an integer equal to or larger than 2. Each one of the iron core materials included in one of n number of rows is located between the iron core materials lengthwise adjacent to each other in the row next to the one row.

Abstract: The present invention relates a stator segment for an electrical machine, comprising a plurality of windings, each winding having a winding starting and ending point, and a stator yoke with a plurality of stator slots for receiving at least one stator winding, said segment having a first side and a second side. At least one winding having its starting point at the first side, and its ending point at the first side of the segment, the at least one winding is received in one or more stator slots.

Abstract: A micromechanical device has a functional layer. One or more layers are provided between the functional layer and the micromechanical device to provide stress relief.

Abstract: Transducer assemblies and associated methods are provided for facilitating alignment of ultrasonic transducers with respect to pipes onto which the transducers are installed. The transducer assembly can include a transducer housing having a track on along which the transducers can be slidingly engaged. The transducer assembly can include attachment structures having alignment features used to align the transducers parallel to the axial centerline of the pipe while ensuring that the reception/emission sides of the transducers are oriented normal to the outer surface of the pipe. In some embodiments a transducer assembly alignment system can be used to align two transducer assemblies on circumferentially opposite sides of a pipe.

Abstract: A crystal unit according to this disclosure includes an IT-cut round crystal element supported at two points on an outer periphery portion of the IT-cut round crystal element. A rotation angle in plane between a straight line connecting the two points and Z? axis of a double-rotation is within a specific range. The specific range includes an angle where an amount of frequency variation is zero.

Abstract: A piezoelectric element includes a substrate, a lower electrode layer, a piezoelectric layer, and an upper electrode layer. The lower electrode layer is fixed to the substrate and the piezoelectric layer is formed on the lower electrode layer. The upper electrode layer is formed on piezoelectric layer. The lower electrode layer contains pores therein and has a larger thermal expansion coefficient than the piezoelectric layer.

Abstract: A piezoelectric/electrostrictive film type element includes a lower electrode, a piezoelectric layer, and an upper electrode laminated in order on a support. An average particle diameter of each of particles of a piezoelectric material forming the piezoelectric layer falls within a range of 0.5 ?m to 10 ?m. The sectional shape of the piezoelectric layer is a “quadrilateral (substantially rectangular shape) having a height of from 0.5 ?m to 15 ?m and an angle (?) at an end point of a base of from 85° to 105°.” A surface roughness of a side surface of the piezoelectric layer is 0.05 d?m to 0.5 d?m at the maximum height roughness Rz (defined by JIS B 0601:2001). Both “generation of a leak current that flows through the piezoelectric layer” and “occurrence of particle shedding from a side surface of the piezoelectric layer” can be prevented.

Abstract: A base unit includes a base member including a first through-hole, a peripheral edge portion, and a thin portion, and a bushing including a bearing holding portion and first and second protrusion portions. The first and second protrusion portions respectively extend radially outward from an upper end portion and a lower end of the bearing holding portion. The first through-hole axially extends through the base member. The first through-hole is defined by an inner surface of the base member radially opposed to the bearing holding portion. The peripheral edge portion extends radially outward from the first through-hole. The thin portion is arranged radially outward of the peripheral edge portion. The thin portion has an axial thickness smaller than that of the peripheral edge portion. The bushing is arranged within the first through-hole. The peripheral edge portion is arranged between the first protrusion portion and the second protrusion portion.

Abstract: A rotary electric machine includes a stator core; a rotor that includes a laminated core, core holders, and cooling fans; a frame that includes a tubular unit that encloses the stator core and the rotor, and a first bracket and a second bracket that extend in a direction of a rotor shaft and supports the rotor shaft; and cartridges that are detachably attached to the first bracket and the second bracket and rotatably supports the rotor shaft, wherein groove-like or hole-like holding portions, which hold end portions of bearing attaching and detaching jigs inserted through the first bracket and the second bracket, are provided in the cooling fans.

Abstract: A bicycle generator that includes a stator, a rotating member defining a rotating axis, a magnet arranged so as to face the stator, a first transmission structure that transmits rotational motion of the rotating member to the magnet at a first rotational speed ratio when the rotating member rotates in a first direction, and a second transmission structure that transmits rotational motion of the rotating member to the magnet at a second rotational speed ratio when the rotating member rotates in a second direction. The second rotational speed ratio is greater than the first rotational speed ratio.

Abstract: In a controller-integrated electric rotating machine configured to assemble a front side semi-manufactured assembly E formed from an electric rotating machine main body 1 and a front bracket 4 with the rear side semi-manufactured assembly D to which a rear bracket 5, a control unit assembly A, a power unit assembly B, and a brush unit assembly C are integrated, a series of brush restricting pin insertion holes 24 are disposed from a rear side end surface of the control unit assembly through the brush, and therefore assembling workability is improved without failures in assembling work which occur due to breaking away of a brush from a brush holder to the rotary shaft side.

Abstract: An electric drive unit (100) of the invention includes the electric motor (1) and the control apparatus (20) that is disposed on an axis line of a rotation shaft (2) of the electric motor (1) and controls the driving of the electric motor (1). The electric motor (1) has a motor terminal (13) extending parallel to an axial direction of the rotation shaft (2) toward the control apparatus (20) and a slit (13a) is provided to the motor terminal (13) at an end on a side of the control apparatus (20). The control apparatus (20) has a motor connection terminal (34) provided on a line extended from the motor terminal (13) and connected to the motor terminal (13). The slit (13a) in the motor terminal (13) is press-fit and fixed to the motor connection terminal (34).

Abstract: Various embodiments of the present invention are directed to a dispenser configured for storing one or more items and dispensing the stored items to authorized users. According to various embodiments, the dispenser generally includes a housing defining an interior portion dimensioned to receive a plurality of items and an access assembly configured to prevent unauthorized user access to the interior portion of the dispenser while providing selective access to certain items in response to input received from an authorized user. According to various embodiments, the access assembly comprises a pair of flexible barriers coupled to a sliding door assembly, which includes one or more lockable access doors. Together, the door assembly and flexible barriers prevent access to the interior of the dispenser when in a locked configuration and permit access to certain items when in an unlocked configuration.

Abstract: A portable spice rack that comprises a square or rectangular shaped housing and a plurality of spice drawers which are stacked vertically within the housing. The spice drawers provide a plurality of compartments that are uniquely designed to accommodate storing and retrieving varying shaped and sized spice bottles or other types of containers. Specifically, the spice drawer provides a substantially rectangular compartment having a base further providing a slot formed by an opening and opposed supporting walls. The rectangular compartment and slot within the base coact to enable, in particular, square, rectangular, and/or circular spice bottles or containers, or any combination thereof, to be stored and retrieved at the same time within any of the plurality of compartments within the spice rack.

Abstract: Magnetic fastener apparatus and related methods are disclosed herein. An example electronic device includes a first housing coupled to a second housing to define a cavity. A latch is coupled to the first housing, and a frame defining an opening is coupled to the second housing. A biasing element is positioned in the opening of the frame and a fastener is at least partially disposed in the opening. The fastener moves between a locked position via the biasing element to engage the latch and an unlocked position via a magnetic field to cause the fastener to disengage the latch. The latch and the frame are positioned inside the cavity when the first housing is coupled to the second housing.

Abstract: An image reading apparatus includes a reader and a casing. The casing includes a first casing, a second casing, a first port and a second port disposed between the first casing and the second casing at a first side of the casing. A width of the second port is less than a width of the first port and the second port overlaps with a portion of the first port. A pivotable member is pivotably attached to the first casing. The pivotable member includes a first arm and a second arm that pivot about a pivoting axis and a connection portion connecting the first arm and the second arm. A wall of the first casing at the first side covers the connection portion.

Abstract: A door for a electronic device that may be removed by the user.