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PIEZOELECTRIC POWER GENERATION MODULE AND REMOTE CONTROLLER

Thu, 27 Oct 2016 08:00:00 EDT

A rectifier circuit rectifies power generation voltage of a piezoelectric element to generate DC voltage and supplies the power generation voltage to a load. Upon termination of a process started upon reception of the DC voltage supplied from the rectifier circuit, the load sets a discharge switch to a conduction state using an output port signal. The electric charge remaining in the piezoelectric element is reset to zero by the discharge switch.



ENERGY HARVESTING SYSTEMS, APPARATUS, AND METHODS

Thu, 27 Oct 2016 08:00:00 EDT

Energy harvesting apparatus, systems, and methods comprising a variable capacitor, a charge source, and an actuator. In some embodiments, the charge source places an initial charge on the capacitor. Meanwhile, the actuator is driven by a reciprocating (external) driver which varies the capacitance of the capacitor. The load is in communication with the capacitor such that, as its capacitance varies, it delivers power to the load. The load can be a battery which can be the source of the charge. Furthermore, the capacitor can further comprise a plurality of stacked capacitors. As to the conductive layers of the capacitor, one of them can further comprise a gel, grease, or oil. Note that the actuator can vary a thickness of the (pre-tensioned) dielectric layer and that the actuator can vary the area of the dielectric layer. Furthermore, a surface of the dielectric layer can be coated with a release agent.



TRIBOELECTRIC GENERATOR

Thu, 27 Oct 2016 08:00:00 EDT

A triboelectric generator includes first and second electrodes facing each other, and a first energy generation layer provided on the first electrode and generating electric energy through contact with other material, the first energy generation layer comprising a two-dimensional (2D) material having a crystal structure of a 2D shape.



IN-PLANE AND OUT-OF-PLANE MOTION ACTUATOR

Thu, 27 Oct 2016 08:00:00 EDT

A near-eye light field display for use with a head mounted display unit with enhanced resolution and color depth. A display for each eye is connected to one or more actuators to scan each display, increasing the resolution of each display by a factor proportional to the number of scan points utilized. In this way, the resolution of near-eye light field displays is enhanced without increasing the size of the displays.



MAGNETIC ROTATION ACCELERATOR AND POWER GENERATION SYSTEM INCLUDING THE SAME

Thu, 27 Oct 2016 08:00:00 EDT

Provided are a magnetic rotation accelerator and a power generation system. The magnetic rotation accelerator includes: a shaft; a fixed plate through which the shaft penetrates and on which a plurality of first magnetic units are disposed; and a rotary plate through which the shaft penetrates, which faces the fixed plate and on which a plurality of second magnetic units are disposed, wherein a repulsive force is generated between the first magnetic units and the second magnetic units, the first magnetic units form a first row and a second row around the shaft, and the second magnetic units form a third row and a fourth row around the shaft, wherein central axes of the first magnetic units of the first row are in phase with central axes of the first magnetic units of the second row, and central axes of the second magnetic units of the third row are out of phase with central axes of the second magnetic units of the fourth row.



PERMANENT MAGNET MOTOR

Thu, 27 Oct 2016 08:00:00 EDT

In a permanent magnet motor, projections each include a second projecting portion and a first projecting portion separated away from a side surface of a permanent magnet. When the first projecting portion has a total length L1 in an axial line direction and a height t1, and when the second projecting portion has a total length L2 in the axial line direction and a height t2, (L1×t1)>(L2×t2) is satisfied. As a result, the permanent magnet motor capable of reducing vibration noise of the motor by reducing irregular rotation, reducing decrease in motor torque, and further reducing increase in motor physical size can be obtained.



Systems and Methods for Constructing Downhole Electric Motors

Thu, 27 Oct 2016 08:00:00 EDT

Systems and methods for constructing electric motors in which rotor sections are individually keyed to a rotor shaft such that, in a resting position, the rotor sections are circumferentially shifted (“clocked”) with respect to each to mitigate effects of harmonic feedback, torsional flexibility and the like. In one embodiment, a system includes an electric drive, and an ESP coupled to it by a power cable. The ESP motor has a rotor in which multiple permanent-magnet rotor sections are mounted to a shaft. Within each rotor section, permanent magnets are positioned in two or more axially aligned rows. Adjacent rotor sections are clocked with respect to each other so that, in operation, the rows of permanent magnets in the different rotor sections are positioned to counter the harmonic feedback or to use torsional deflection to equalize torque contributions from the different rotor sections.



ROTARY ELECTRIC MACHINE ROTOR

Thu, 27 Oct 2016 08:00:00 EDT

A rotary electric machine rotor includes a rotor core, a rotor shaft, and a nut portion. The rotor core is made up of stacked thin magnetic plates. The rotor shaft has, on one end side, a receiving portion that abuts against one end surface in an axial direction of the rotor core, and has, on the other end side, an outer diameter threaded structure. The nut portion meshes with the outer diameter threaded structure of the rotor shaft. A position, on the rotor shaft, of a contact surface between the nut portion and the rotor core is positioned farther to the other end side in the axial direction than the outer diameter threaded structure, when the rotor core is fixed to the rotor shaft by the nut portion being fastened to the outer diameter threaded structure of the rotor shaft.



COLD PRESSURE WELDING APPARATUS, COIL MANUFACTURING APPARATUS, COIL, AND METHOD OF MANUFACTURING THE SAME

Thu, 27 Oct 2016 08:00:00 EDT

The cold pressure welding apparatus includes a first holding part capable of sandwiching a first flat conductor, a second holding part disposed opposite to the first holding part and capable of sandwiching a second flat conductor, and a drive part for moving the first holding part and the second holding part. The drive part can move the first holding part and the second holding part between a first direction separated position and a close position along a first direction. The drive part can move the first holding part and the second holding part between a second direction separated position and a sandwiching position along a second direction.



MOTOR DRIVING CONTROL DEVICE FOR VEHICLE

Thu, 27 Oct 2016 08:00:00 EDT

A motor driving control device for a vehicle that includes: a circuit board on which is packaged a circuit that generates the voltage applied to windings of a motor, the circuit board having a ground region; a heat dissipating member that dissipates heat from the circuit board, and that is electrically connected to the ground region on the circuit board; a supporting member that holds the circuit board and a bearing member of the motor, and that has an insulating surface; and an electrically-conductive member that is provided at a surface of the supporting member, and that, by electrically connecting the bearing member and the heat dissipating member, grounds a rotating body, an output shaft and the bearing member of the motor.



Transportation device with reciprocating part and kinetic storage

Thu, 27 Oct 2016 08:00:00 EDT

Manual drive energy is input into a transport device of one embodiment by linearly reciprocating a first drive member that couples by way of a ratchet mechanism (or other mechanical motion rectifier means) and a mechanical motion amplifier means to one or more faster spinning flywheel masses. The one or more flywheel masses are formed in part by a combination electric motor/generator and it has rechargeable electric batteries distributively provided about a flywheel mass portion thereof. Tapered roller bearings having ferromagnetic material are interposed between the one or more flywheel masses and/or between one of the flywheels and a stationary frame of the transport device so as to repeatedly make and break closed magnetic flux conducting loops and thus provide at least one of an electric motoring and electricity generating function.



DIRECT DRIVE ROTOR WITH METAL COUPLER

Thu, 27 Oct 2016 08:00:00 EDT

A rotor for an outer rotor-type motor is provided. The rotor includes a metallic coupler and a polymeric frame molded over at least part of the metallic coupler.



ELECTROMECHANICAL ACTUATOR DAMPING

Thu, 27 Oct 2016 08:00:00 EDT

The invention provides a stator for an electric motor comprising a plurality of teeth separated by slots, and comprising conductive material provided in the slots between two or more of the teeth.



COOLING STRUCTURE FOR STATOR

Thu, 27 Oct 2016 08:00:00 EDT

A housing includes a housing center axis, a first end surface, a second end surface opposite to the first end surface in a direction of the housing center axis, a housing large inner peripheral surface, a housing small inner peripheral surface, and a housing step surface connecting the housing large inner peripheral surface and the housing small inner peripheral surface to face toward the first end surface. A stator holder includes an annular wall, a first flange fixed to the housing so that the first flange surface contacts the first end surface, and a second flange having a second flange second surface which faces the housing step surface. A annular sealing member is provided between the second flange second surface and the housing step surface to be pressed toward the second end surface via the second flange.



COMPRESSOR

Thu, 27 Oct 2016 08:00:00 EDT

A compressor includes a casing, a compression mechanism arranged inside the casing, a motor arranged inside the casing, and an insulation sheet. The motor drives the compression mechanism. The motor is a concentrated-winding motor having a stator that has a plurality of teeth, and an insulator adjacent to the stator, with windings wound about the teeth with the insulator interposed between the windings and the teeth. The insulation sheet is arranged between the casing and crossover wires of the windings.



Rotating Electrical Machine and Vehicle Equipped with Rotating Electrical Machine

Thu, 27 Oct 2016 08:00:00 EDT

A rotating electrical machine includes: a stator core; a stator winding; and a rotor. Cross conductors connect slot conductors to run astride slots with the slot pitch N+1 at coil ends on one side and run astride slots with the slot pitch N−1 at coil ends on another side, with N representing a number of slots per pole; the stator winding includes slot conductor groups each having a plurality of slot conductors; the plurality of slot conductors in each slot conductor group are inserted at a predetermined number NS of successive slots so that the slot conductors in the slot conductor group take successive slot positions and successive layer positions; and the number NS is set so that NS=NSPP+NL when NSPP represents a number of slots per phase per pole and a number of layers is expressed as 2×NL.



ELECTROMECHANICAL ACTUATOR DAMPING

Thu, 27 Oct 2016 08:00:00 EDT

The invention provides a stator for an electric motor comprising a plurality of radially inwardly extending teeth and comprising conductive material incorporated in one or more of the teeth.



ROTOR OF AN ELECTRIC MACHINE

Thu, 27 Oct 2016 08:00:00 EDT

A rotor of an electric machine includes a plurality of permanent magnets arranged on an exterior of the rotor, and a bandage tape wound around the permanent magnets for fixing the permanent magnets in place. The bandage tape includes a first tape end, which is fastened to a surface of at least one permanent magnet, and a second tape end, which is an end of an outermost tape section of the bandage tape and is fastened to a tape section of the bandage tape disposed below the outermost tape section. The bandage tape is wound around the permanent magnets with a prestress such that in a region of each permanent magnet, at least one tape section of the bandage tape has a predeterminable minimum prestress.



ROTOR YOKE

Thu, 27 Oct 2016 08:00:00 EDT

A rotor yoke is rotatable about an axis, is adapted for a plurality of permanent magnets to be mounted therein, and includes a central section a peripheral section, and a connecting section. The peripheral section is formed with a plurality of outer slots for respectively receiving the permanent magnets. The connecting section is formed with a plurality of inner slots, and a plurality of magnetic reluctance units adjacent to outer slots and each including at least two magnetic reluctance slots that are radially aligned relative to the axis. Each of the magnetic reluctance slots permits portions of magnetic field lines generated by the permanent magnets to pass around the magnetic reluctance slots so as to increase density of the magnetic field lines.



ROTARY ELECTRIC MACHINE ROTOR

Thu, 27 Oct 2016 08:00:00 EDT

A rotor (12) includes i) a stacked body (24) in which a plurality of holed steel plates (28a, 28b) provided with holes (29, 30) punched out of insulation coated steel plates are stacked together, and that includes a plurality of magnet holes (34) each of which is provided by the plurality of holes (29, 30) being connected together in an axial direction, and ii) a plurality of magnets (31n, 31s), at least one of which is arranged in each of the magnet holes (34). The plurality of holed steel plates (28a, 28b) include a first holed steel plate (28a) that contacts a first magnet (31n) that is one magnet, of two magnets (31n, 31s) that are adjacent in a circumferential direction from among the plurality of magnets (31n, 31s), and supports the first magnet (31n), at at least one circumferential portion, but does not contact a second magnet (31s) that is another magnet, and a second holed steel plate (28b) that contacts the second magnet (31s) and supports the second magnet (31s), but does not contact the first magnet (31n, 38n, 50n, 60n).



MAGNETIC FLUX MOTOR

Thu, 27 Oct 2016 08:00:00 EDT

One or more embodiments may take the form of a motor having a magnetically-driven mass. In certain embodiments, the mass or masses may be rotated about a connected shaft through axial or radial magnetic flux. Generally, embodiments described herein employ radial or axial magnetic flux to turn one or more magnets affixed to a central shaft, thereby rotating the shaft through the magnet(s') motion to produce a desired output or effect.



Axial Gap Type Motor

Thu, 27 Oct 2016 08:00:00 EDT

It is an object of the present invention to provide an axial gap type motor in which continuously wound coils can be easily assembled as a stator coil of the axial gap type motor, and the workability for the work of winding wires without any connecting wire on a gap surface can be improved. The axial gap type motor includes a stator and a rotator facing each other in a rotation shaft direction, and the stator is arranged with a plurality of cores and a plurality of winding wire coils wound around the cores arranged in a circumferential direction. First, second, and third winding wire coils are wound, with a single continuous conducting wire, around first, second, and third cores arranged in order adjacent to each other in the circumferential direction. A winding direction of the second winding wire coil wound around the second core located in a center and winding directions of the first and third winding wire coils wound around the first and third cores both being located adjacent to the second core are a negative direction.



Electric Machine for a Vehicle

Thu, 27 Oct 2016 08:00:00 EDT

An electric machine for a vehicle includes a rotor and a plurality of laminations stacked to form a stator core. Each of the laminations has teeth extending towards the rotor and defining slots. The stator core includes first and second sets of laminations. The teeth of the first set are narrower than the teeth of the second set. The electric machine also includes windings wound in the slots to form coils.



MOTOR AND METHOD FOR USING AND MAKING THE SAME

Thu, 27 Oct 2016 08:00:00 EDT

A motor and methods for making and using same. The motor includes a stator having a first stator portion with first and second arcuate regions. The arcuate regions can receive a rotor with a magnetic pole and being concentrically arranged with the stator relative to a central axis. The stator can have one or more winding portions for being wound with a winding and extending from the first stator portion opposite the arcuate regions. When the winding is not energized, a first magnetic coupling between the first arcuate region and a selected magnetic pole is greater than a second magnetic coupling between the second arcuate region and the selected magnetic pole. A selected winding portion is angularly offset from the first arcuate region to advantageously enable movement of the rotor to initiate in either of two opposite directions relative to the selected winding portion when the winding is energized.



STATOR FOR AC MOTOR FOR AN ELECTROMECHANICAL ACTUATOR (EMA)

Thu, 27 Oct 2016 08:00:00 EDT

The present invention goes away from conventional teaching and provides a stator having a construction that creates or allows induced currents thus providing a damping function. This effect is provided by forming the stator back iron of a solid piece of iron material or iron alloy as opposed to a stack of laminations or compressed powder.



VARIABLE THICKNESS DIAPHRAGM FOR A WIDEBAND ROBUST PIEZOELECTRIC MICROMACHINED ULTRASONIC TRANSDUCER (PMUT)

Thu, 27 Oct 2016 08:00:00 EDT

A diaphragm for a piezoelectric micromachined ultrasonic transducer (PMUT) is presented having resonance frequency and bandwidth characteristics which are decoupled from one another into independent variables. Portions of at least the piezoelectric material layer and backside electrode layer are removed in a selected pattern to form structures, such as ribs, in the diaphragm which retains stiffness while reducing overall mass. The patterned structure can be formed by additive, or subtractive, fabrication processes.



BULK ACOUSTIC WAVE RESONATOR AND METHOD FOR MANUFACTURING THE SAME

Thu, 27 Oct 2016 08:00:00 EDT

In examples, there is provided a bulk acoustic wave resonator including a substrate; a resonating part including a first electrode, a piezoelectric layer, and a second electrode, laminated on an upper surface of the substrate, a cap bonded to the substrate by a bonding agent; and a sealing layer formed on an externally exposed surface of the bonding agent. This structure provides for a bulk acoustic wave resonator with improved reliability.



PROTECTIVE BEARING, BEARING UNIT, AND VACUUM PUMP

Thu, 27 Oct 2016 08:00:00 EDT

To provide a protective bearing, a bearing unit, and a vacuum pump that are configured to prevent a touchdown bearing from co-rotating with the rotation of a rotor that is supported in a levitated state and a non-contact state. Slits are formed in the radial direction at four sections on the inner side of a securing member. A pair of permanent magnets of the same polarity is fixed to the upper surface of each of the four regions partitioned by the slits. The inner rim of the securing member has projections that are formed circumferentially downward. An attractive force is generated between an outer ring and an inner ring. An attractive force is also generated between the projections projecting toward the inner end of the securing member and the inner ring. Due to this configuration, even when a rotational torque is applied to the inner ring of the touchdown bearing as a result the rotation of the rotating body, co-rotation of the inner ring does not occur due to a large holding torque.



RECIPROCATING PISTON ENGINE

Thu, 27 Oct 2016 08:00:00 EDT

A reciprocating piston engine is disclosed having a first inner magnetic field unit comprising a first inner magnetic field unit arranged on a first crank arm of a crankshaft including a magnetizable material, and a stationary first outer magnetic field unit. The first inner magnetic field unit and the first outer magnetic field unit together form a first electromechanical converter. The first crank arm has a first securing surface on a face which points radially outwards with respect to a crankshaft axis and which is opposite a first connecting rod bearing. A first counterweight is fixed to the first securing surface in a formfitting manner in the radial direction, said first counterweight including a non-magnetizable material. The first magnetic field unit is arranged on a counterweight face pointing radially outwards with respect to the crankshaft axis.



MONOLITHICALLY INTEGRATED THREE ELECTRODE CMUT DEVICE

Thu, 27 Oct 2016 08:00:00 EDT

A capacitive micromachined ultrasonic transducer (CMUT) cell comprising three electrodes: a first electrode coupled to a cell membrane; a second electrode embedded into a cell floor opposing the first electrode and separated therefrom by a gas or vacuum cavity; and a third electrode opposing the second electrode on the cavity side, wherein a dielectric layer is sandwiched between the second electrode and the third electrode to create a capacitive relation between the second electrode and the third electrode. The three electrode CMUT cell provides an ultrasound transducer with two actively driven (controlled) electrodes.



Vehicle Power Module Assemblies and Manifolds

Thu, 20 Oct 2016 08:00:00 EDT

A vehicle power module assembly is provided. The vehicle power module assembly may include a multi-level housing defining first and second chambers, an inlet opening into the first chamber, and an outlet opening from the second chamber. The housing may be configured such that the chambers form a stepped manifold to influence momentum of a coolant flow between the inlet and outlet. A frame may support the housing and is located proximate to at least one power inverter. A screen may be disposed in at least one of the chambers to promote coolant flow uniformity to the outlet. The frame assembly may include a plurality of frames stacked in an array, and each frame may define a channel in at least partial registration with the outlet.



ELECTRICAL WIRING MEMBER PRODUCTION METHOD, ELECTRICAL WIRING MEMBER FORMING MATERIAL, ELECTRICAL WIRING MEMBER, ELECTRICAL WIRING BOARD PRODUCTION METHOD, ELECTRICAL WIRING BOARD FORMING MATERIAL, ELECTRICAL WIRING BOARD, VIBRATOR, ELECTRONIC APPARATUS, AND MOVING OBJECT

Thu, 20 Oct 2016 08:00:00 EDT

A method for producing an electrical wiring member includes press-molding a composition containing a resin material and metal particles with an insulating layer, each of which is constituted by a metal particle and a surface insulating layer covering the metal particle and containing a glass material as a main material, thereby obtaining a powder-compacted layer and irradiating the powder-compacted layer with an energy beam, thereby causing the irradiated regions to exhibit electrical conductivity.



TUNING-FORK TYPE CRYSTAL RESONATOR PLATE AND CRYSTAL RESONATOR DEVICE

Thu, 20 Oct 2016 08:00:00 EDT

A tuning-fork type crystal resonator plate includes a base portion and a pair of leg portions protruding from the base portion in one direction. A groove and a bank portion are formed on at least one of main surfaces of each of the leg portions. The bank portion is formed accompanied by the formation of the groove, and a width of the bank portion differs along a width direction. The bank portion is constituted by a thick portion having a large width and a thin portion having a small width.



ACOUSTIC RESONATOR DEVICE WITH AT LEAST ONE AIR-RING AND FRAME

Thu, 20 Oct 2016 08:00:00 EDT

An acoustic resonator device includes a bottom electrode disposed on a substrate over an air cavity, a piezoelectric layer disposed on the bottom electrode, and a top electrode disposed on the piezoelectric layer, where an overlap between the top electrode, the piezoelectric layer and the bottom electrode over the air cavity defines a main membrane region. The acoustic resonator device further includes at least one metal frame disposed on a bottom surface of the bottom electrode having a thickness that ranges from about 10% to about 75% of a thickness of the bottom electrode in a central region of the bottom electrode. The thickness of the metal frame improves heat dissipation out of the acoustic resonator device while also improving structural stability of the acoustic resonator device without detrimentally affecting its performance.



CRYSTAL DEVICE

Thu, 20 Oct 2016 08:00:00 EDT

A crystal device includes a package including a cavity formed therein, a thermistor disposed on a bottom surface of the cavity and integrated with the package, a crystal blank spaced apart from the thermistor in the cavity, and a lead coupled to the package so as to cover the cavity.



MECHANICAL RESONATOR WITH A SPRING-MASS SYSTEM COMPRISING A PHASE-CHANGE MATERIAL

Thu, 20 Oct 2016 08:00:00 EDT

A mechanical resonator includes a spring-mass system, wherein the spring-mass system comprises a phase-change material. The mechanical resonator typically comprises an electrical circuit portion, coupled to the phase-change material to alter a phase configuration within the phase-change material. Methods of operation are also disclosed.



HARVESTING MECHANICAL AND THERMAL ENERGY BY COMBINING NANOWIRES AND PHASE CHANGE MATERIALS

Thu, 20 Oct 2016 08:00:00 EDT

A system is disclosed for harvesting at least one of mechanical or thermal energy. The system may have a flexible substrate, a plurality of electrically conductive nanowires secured to the substrate, and a plurality of electrically conductive metal layers. The metal layers may be disposed on the substrate and spaced apart from one another along a length of the substrate. The metal layers may be in electrically conductive contact with various ones of the nanowires. At least two of the metal layers may be attachable to an external device. At least one of movement or flexing of the substrate produces an output voltage across the metal layers.



VIBRATION ACTUATOR, AND LENS BARREL AND CAMERA PROVIDED WITH SAME

Thu, 20 Oct 2016 08:00:00 EDT

A vibration actuator that is easy to manufacture and has good driving performance, and a lens-barrel and a camera provided with the same. The vibration actuator is provided with an oscillator that generates oscillations; and a relative movement member that is pressure contacts the oscillator, and moves relative to the oscillator due to the oscillation. Either a contact face of the oscillator with respect to the relative movement member or a contact face of the relative movement member with respect to the oscillator is a thermosetting resin film that is formed of polyamide-imide resin and fluororesin, and the other contact face is an anodic oxide film.



INVERTER DRIVE SYSTEM, BUS BAR AND ASSEMBLY

Thu, 20 Oct 2016 08:00:00 EDT

An inverter drive assembly includes a first array of inverters, a second array of inverters spaced from the first array of inverters and defining a plenum therebetween, and a crossover bus bar spanning the plenum and electrically connecting the first array of inverters to the second array of inverters. The crossover bus bar includes a first laminated bus section electrically connected to the first array of inverters, a second laminated bus section electrically connected to the second array of inverters, and a solid bus connection interconnecting the first laminated bus section with the second laminated bus section.



VOICE COIL MOTOR

Thu, 20 Oct 2016 08:00:00 EDT

A voice coil motor includes a housing having a cavity; a movable assembly received in the cavity; a fixing assembly configured outside of the movable assembly; and a first spring plate and a second spring plate configured at an upper surface and a lower surface of the movable assembly respectively. The fixing assembly comprises at least two magnetic elements connected with the first spring plate and a spacer member configured on the second spring plate to connect the second spring plate to the magnetic elements or the housing. The voice coil motor is served as an actuator of electronic products such as digital cameras, mobile phones, and digital cameras, which has thin thickness, good performance and strong applicability.



ENERGY HARVESTING DEVICE

Thu, 20 Oct 2016 08:00:00 EDT

An energy harvesting device comprises a semiconductor device, and a first magnet core. The semiconductor device, disposed in a housing, includes planar inductors. The first magnet core, having a first surface over the planar inductors, is configured to move with respect to the semiconductor device in a first direction that reduces a first vertical distance between the plane and the first surface.



Permanent Magnet Motor

Thu, 20 Oct 2016 08:00:00 EDT

A permanent magnet motor, comprising a stator (1) and a rotor (4); the rotor comprises a rotor iron core (5) and permanent magnets (7a, 7b); in the radial direction of the rotor, each magnetic pole of the rotor iron core is provided with multiple layers of arc-shaped permanent magnet grooves (6a, 6b); a q-axis magnetic flux path is formed between two neighboring layers of permanent magnet grooves; the permanent magnets are disposed in the permanent magnet grooves; the number of stator slots being N, the number of pairs of rotor poles being P, the number of phases of windings being m, and the number of stator slots per pole per phase (N/2P/m) being an integer. As compared with motors having existing structures, the permanent magnet motor dramatically reduces the torque ripple thereof.



OPTIMUM ROTOR SKEW ANGLE FOR AN ELECTRIC MACHINE

Thu, 20 Oct 2016 08:00:00 EDT

An electric machine assembly includes a stator core, a rotor assembly and a controller. The stator core defines a number of stator slots extending along a longitudinal axis and angularly spaced about the longitudinal axis. The rotor assembly is rotatable relative to the stator core and includes a plurality of laminations stacked between first and second ends of the rotor assembly. The laminations are skewed relative to each other. Each respective one of the plurality of laminations defines a number of rotor slots positioned along an outer periphery. The controller includes a processor and tangible, non-transitory memory on which is recorded instructions for executing a method of obtaining an optimal rotor skew angle. The optimum rotor skew angle is selected from a set (SK) of skew angles between first and second skew angles (SK1≦SK≦SK2).



Method for Producing Lamellae for a Lamellae Package, in Particular for Electrical Machines and Generators, Device Having at Least one Punch Press, and Lamellae and Lamellae Package Produced According to the Method

Thu, 20 Oct 2016 08:00:00 EDT

The invention relates to a method for producing lamellae for a lamellae package, wherein the lamellae are punched from a metal strip by at least one punching die. At least one part of the contour of the lamella is produced by stream cutting. The method is carried out such that the lamella is still held in the metal strip. The lamella is punched out of the metal strip by the punching die. The stream cutting results in clean cutting edges, which do not require reworking of the lamella. The device for carrying out the method according to the invention has a stream cutting unit upstream of the punching press which has at least one stream cutting head. A wide variety of lamella contours can be cut out of the metal strip with high accuracy using said stream cutting unit.



GENERATOR ROTOR FRETTING FATIGUE CRACK REPAIR METHOD

Thu, 20 Oct 2016 08:00:00 EDT

A method of servicing, or repairing a crack in, a dovetail portion of a dynamoelectric machine's rotor coil slot wall. The coil slot wall includes a radial entry surface connected to an inwardly tapered surface. The inwardly tapered surface is connected to an intermediate radial surface. A machining step machines a first groove in the radial entry surface and inwardly tapered surface. The first groove extends linearly to the intermediate radial surface. The first groove is configured so that a smooth and linear surface is created along a length of the first groove. A second machining step machines a second groove in the intermediate radial surface in an orientation substantially perpendicular to the first groove. A portion of the second groove contacts a portion of the first groove. At least one of the first groove and the second groove are configured to remove damaged material from the coil slot wall.



SENSORLESS CONTROL OF A DC SYNCHRONOUS MACHINE

Thu, 20 Oct 2016 08:00:00 EDT

An assembly for operating a DC synchronous machine according to an exemplary aspect of the present disclosure includes, among other things, a controller that is configured to determine a position of a rotating portion utilizing a carrier signal, adjust current supply to a field winding, and monitor and adjust operation of the DC synchronous machine based on various electrical parameters relating to the carrier signal. A method for operating a DC synchronous machine is also disclosed.



ELECTRIC ACTUATOR WITH A MANUAL DRIVE MEANS

Thu, 20 Oct 2016 08:00:00 EDT

An actuator including a frame, an electric motor fastened to the frame and to a rotor that is constrained to rotate with an outlet shaft, and a connector electrically connected to the motor and secured to the frame to be connected to a complementary connector. The actuator includes a secondary drive device having a secondary shaft having a first end that extends outside the frame and is arranged to be coupled to rotate with a rotary drive tool, a second end of the secondary shaft in rotation coupled with the outlet shaft, and an activation rod opening out into the connector is secured to the frame and arranged to prevent the secondary shaft from being coupled in rotation with the outlet shaft only when the complementary connector is connected to the connector secured to the frame.



Electrically Driven Industrial Vibrator with Circumjacent Eccentric Weight and Motor

Thu, 20 Oct 2016 08:00:00 EDT

An electrically driven eccentric weight industrial vibrator comprises a housing, a stator, a rotor, and at least one eccentric weight. The housing defines an internal chamber. The stator is positioned within the internal chamber of the housing and is fixed in rotation relative to the housing. The rotor encircles the stator and is rotationally connected to the stator and the housing in a manner such that the rotor is able to revolve around the stator within the internal chamber of the housing. The eccentric weight is mounted to the rotor in a manner such that the eccentric weight is able to revolve about the stator together with the rotor.



GENERATOR MOTOR

Thu, 20 Oct 2016 08:00:00 EDT

A generator motor includes a stator, a rotor that rotates relative to the stator, and a motor housing that houses the stator and the rotor. The motor housing includes a housing main body that encloses a periphery of the stator and the rotor and a cover that is attached to an end surface of the housing main body so as to cover an opening formed on the end surface, which is on an opposite side to an engine, of the housing main body. A drain hole for draining water inside the motor housing to below the motor housing is formed between a lower end of the cover and the end surface of the housing main body. The motor housing includes a covered section that covers the drain hole from below at a position that is lower than the drain hole.



ELECTRIC MACHINE

Thu, 20 Oct 2016 08:00:00 EDT

The invention relates to an electric machine, which comprises a stator (1) and a rotor (2) that can be moved in relation to the stator. The stator (1) has a first multi-strand winding (I) and at least a second multi-strand winding (II), which each comprise two sub-windings (A1, A2) mechanically shifted in relation to each other. In a slot (3) of the stator, a number of windings (Nw1) of the first sub-winding (A1) of a multi-strand winding is different from a number (Nw2) of windings of the second sub-winding (A2) of said multi-strand winding. The stator (1) has a number of slots (3) that is twice the number of slots minimally required for a given pole pair number p of the rotor (2) for one of the multi-strand windings.