Abstract: In order to obtain a magnetic bearing apparatus in which a large cooling effect is exerted by a simple configuration, fins 15 which form an air flow in a rearward direction are disposed in a rear portion and outer diameter of a rotary shaft 1, a generator 16 which converts an air flow produced by rotation of the fins 15 to a compressed vortex flow, and which has an axial through hole is fixed with being separated from the fins 15 by an appropriate gap, and a tube 20 in which the inner diameter is larger than the diameter of the through hole 19 of the generator 16, and which has a control valve 21 at the rear end is provided in rear of the generator 16. Cooling wind is produced by a driving force of the rotary shaft 1. Cooling wind flow paths 22 through which the cooling wind is to be passed, and which axially elongate are formed in the rotary shaft 1.

Abstract: A controller-integrated motor includes a motor main body and a controller integrated with the motor main body to control the motor main body, the motor main body, including a stator core, a shaft which rotates to exert driving force on the motor main body, a frame which holds the stator core and the shaft, and an outer fan provided around the shaft so that the motor main body is recessed inward toward a rotational center of the shaft, the outer fan discharging cooling air stream to cool the motor main body, the controller being provided in proximity to an outer periphery of the frame, the motor main body being formed so that a cooling air stream from the outer fan flows in an axial direction of the shaft along an outer peripheral surface of the frame.

Abstract: A plurality of coils wound around a stator magnetic-pole core are connected together and connected to output wires by use of a bus bar. The bus bar having a generally cylindrical body portion is disposed at one axial end of the stator magnetic-pole core, around which the coils are wound such that clearances are formed within magnetic-pole core slots, with an axial clearance formed between the bus bar and the coils. The body portion has such a radial dimension that at least a portion of the clearances within the magnetic-pole core slots is left uncovered. Air holes are formed in the motor housing on opposite sides of the stator magnetic-pole core to thereby form cooling air passages extending through the magnetic-pole core slots.

Abstract: A thermal conductor for a heat-generating liquid pump system of a pool containing liquid and including a pipe. The conductor is adapted for conducting heat from the pump system to liquid circulated by the pump system. The conductor includes a body in thermal communication with a heat generating portion of the pump system and in thermal communication with only an outside surface of the pipe and not in direct contact with the liquid.

Abstract: Alternating current motors used to drive wheels of hybrid or fuel cell vehicles have capacitors which are mounted diametrically on the motors, i.e., mounted around the diameter of the motors. The capacitors may be annular or arcuate in shape. By so configuring the power capacitors, axial space adjacent to the motors is reduced, providing enhanced design flexibility for automotive vehicles.

Abstract: An oilless bearing and a vibration motor having the oilless bearing are disclosed. The vibration motor that includes a housing having an internal space, an oilless bearing which is inserted and secured in the housing, and a shaft of which one end is at least partially inserted into the oilless bearing, where the oilless bearing has a contact part which is in contact with the perimeter of the shaft and a non-contact part which is formed adjoining the contact part and which has a diameter greater than the diameter of the shaft, and where the non-contact part is positioned further outward compared to the contact part, can improve the properties of the vibration motor and reduce mechanical noise, while increasing durability.

Abstract: An electric motor, for powering downhole tools, comprises a stator and a rotor connectable to a rotatable device, a permanent magnet and a series of coiled windings or laminations having a connection to a DC supply, the permanent magnet and the laminations being arranged annularly with respect to each other, characterised in that the laminations and coil windings are potted in a potting material impervious to wellbore fluids. The potting material are introduced under a vacuum, and the motor housing confines the potting material, acting as a mould.

Abstract: The invention relates to a rotor block (1) comprising a housing (2) with at least one connection surface (3A) that absorbs the load and pivot bearing seats (4) for plain and/or anti-friction bearings (5) that are designed to support a rotor (6). To dismount the rotor (6) from the housing (2), the plain and/or anti-friction bearings (5) can be dismantled from the exterior and the rotor (6) from a side (8) lying transversally to the bearings. The pivot bearing seats (4) take the form of recesses (9) that are directly configured in the housing wall, without the use of annular bodies. To facilitate the mounting and dismounting processes and to improve the precision of the rotor alignment, the pivot bearing seats (4) are configured in such a way that they form a segment greater than a semi-circle around the plain and/or anti-friction bearings (5), leaving a section open on one side (8) in relation to said bearings (5), thus forming a narrowing (13).

Abstract: A fan includes an inner-rotor type motor and an impeller. The inner-rotor type motor includes a housing, a stator structure, a rotor structure and a driving device. The stator structure has a magnetically conducting element. The rotor structure includes a shaft and a magnetic element. The shaft passes through the housing. The magnetic element mounts on the shaft and is disposed corresponding to the magnetic conducting element. The driving device is electrically connected with the magnetically conducting element. The stator structure, the rotor structure and the driving device are accommodated in the housing. The impeller is connected to the shaft.

Abstract: An electric motor includes a rotor shaft arranged in a casing and having an axial hollow bore formed therethrough for passage of lubricating oil, a rotor, a stator, a pair of bearings each having an inner race and an outer race, a pair of bearing fixing parts supporting the rotation of the rotor shaft, and bearing cooling devices each having a cylindrical heat dissipation portion fixedly secured to the rotor shaft so as to be in contact with either one of end faces of the individual inner races, the heat dissipation portion extending from the one end face of each inner race to a side opposite to the bearings. A pair of spaces between rotor-side end faces of the bearings and the bearing fixing parts, respectively, are in communication with ring gaps between the heat dissipation portions and the rotor shaft, respectively, through radial communication holes in the rotor shaft.

Abstract: A bearing structure, which is cooperated with a shaft, includes a housing, a bearing, an elastic element and a blocking element. The shaft passes through the bearing. The elastic element presses against the bearing to provide a pre-stress to the bearing. The blocking element is apart from the bearing by a predetermined distance.

Abstract: A device and system for removing heat from a magnetic device such as an electromagnet core section of a magnetic bearing internally by convection. The device includes a ribbon-type conductor portion and an insulator portion that are spirally and. coaxially arranged on a coil. The insulating portion includes window portions that provide a fluid passage when the insulating portion is sandwiched between adjacent conductor portions. The device can be disposed in a plenum in the electromagnet core section and at least one opening in the core section, through which a cooling fluid can be introduced into the plenum, can be provided.

Abstract: A roller system comprising a pulley having a permanent magnet sandwiched in between a pair of temporarily magnetic disks with the magnetism of the disks induced by the permanent magnet. For example, each temporarily magnetic disk comprises steel. Each pole of the permanent magnet is disposed adjacent to a pole of one of the temporarily magnetic disks that is of an opposing polarity resulting in a magnetic attraction to a disk at each pole of the permanent magnet. The opposing magnetic poles form a magnetic flux circuit by which a temporarily magnetic belt, such as a steel belt is guidable to prevent or reduce deviation which it may have from its roller path. Additional permanent magnetic rollers, as described above, or other rollers known in the art may be combined with the magnetic roller of the present invention to form a gear train about which the belt rotates.

Abstract: A rotor assembly for use in an electric motor or generator where the mass of the rotor assembly is reduced with respect to conventional rotor assemblies. In addition, the rotor assembly is configured to be scalable to different sized electric motors. Within the rotor assembly, the rotor hub, the shaft, and the permanent magnets can independently or collectively be modified to have a reduced mass. In one aspect, a portion of the rotor hub adjacent to the shaft is configured with passages and spokes. In another aspect, an intermediate hub with lightening holes is provided between the shaft and the rotor hub. In yet another aspect, a large diameter hollow shaft replaces a portion of the rotor hub. In yet another aspect, the permanent magnets are configured to have an arc-shape, which permits the thickness of the magnets to be reduced without reducing the efficiency of the magnets.

Abstract: An axial gap alternator comprises a first carrier associated with or secured to an output shaft of an internal combustion engine. A first carrier carries a first set of magnets arranged radially about a rotational axis. A second carrier carries a second set of magnets arranged radially and spaced apart axially from the first set of magnets. A stator intervenes axially between the first set of magnets and the second set of magnets.

Abstract: A permanent magnet motor having a rotor and a stator and configured such that when the leading edge of each pole of the rotor aligns with a stator tooth the trailing edge of that pole is generally not aligned with a stator tooth.

Abstract: This electric motor includes first permanent magnets secured integrally to an outer periphery side rotor and second permanent magnets secured integrally to an inner periphery side rotor. The first permanent magnets and the second permanent magnets are arranged so as to offset the relative torque produced between the outer periphery side rotor and the inner periphery side rotor based on the magnetic flux of the inner peripheral permanent magnets and the outer peripheral permanent magnets.

Abstract: An electrical machine includes a first part-winding, a second part-winding, a core having slots in which the first and the second part-windings are wound, and a switching device for connecting the first part-winding to the second part-winding. In each of the slots, one of the two part-windings forms a bottom layer at the slot base, and the other part-winding is disposed as a top layer parallel above the bottom layer. The two part-windings are capable of being connected in parallel with the switching device during operation of the electrical machine. It is thus possible for a symmetrical field distribution to be achieved in a startup circuit. In addition, no additional components caused by harmonic fields occur in the torque curve which could impede runup.

Abstract: An alternator has a rotor and a stator. The stator has a cylindrical armature core wound with an armature wiring. The core has slots disposed along a circumferential direction of the core so as to surround the rotor. Each slot extends in an axial direction of the core and has accommodation regions aligned along a radial direction of the core. Each region receives the wiring. The regions of each slot includes an innermost region and an outermost region, respectively, disposed on both ends of the slot in the radial direction. The wiring has end portions, respectively, drawn out from the outermost regions of different slots, and the wiring has a return portion of which both ends are drawn out from the innermost regions of two different slots.

Abstract: A cutout portion is formed at an outer peripheral side of a stator placing portion provided in a bearing bush for placing a core back portion of a stator. A connecting wire portion of a coil of the stator is inserted through a gap formed between the cut-out portion and the core back portion. The connecting wire portion is, therefore, prevented from being caught between a lower surface of the core back portion and an upper surface of the stator placing portion when the stator is secured on the stator placing portion by a first fixing member.

Abstract: A housing of an electric motor includes an inner circumferential surface, which includes recesses arranged along the circumferential direction. On an outer circumferential surface of a stator core of a stator are provided protrusions arranged along the circumferential direction. Fitting each protrusion to the corresponding recess fixes the stator core to the housing. A rotor is provided radially inward of the stator. In a state where each protrusion is fitted to the corresponding recess, a pair of side surfaces of each protrusion are retained by a pair of inner side surfaces of the corresponding recess in the circumferential direction of the housing. A gap is formed between an end face of each protrusion and an inner bottom surface of the corresponding recess facing the end face along the entire surface of the end face.

Abstract: A system for and method of rotating a transfer wheel providing heat and/or moisture exchange between two counter-flowing air streams. The system comprises: a frame; a transfer wheel including a transfer matrix mounted and rotationally secured relative to the frame so that the wheel can rotate through the two counter-flowing air streams and heat and/or moisture can be transferred between the two counter-flowing air streams; and a first plurality of motor components fixedly mounted relative to the wheel so that components of the first plurality function as a rotor of a motor, and a second plurality of motor components fixedly mounted relative to the frame so that components of the second plurality function as a stator of a motor; wherein power supplied to motor components of the second plurality causes the transfer wheel to rotate through the two counter-flowing air streams.

Abstract: A brushless motor including a rotor which has ten permanent magnets each containing rare earth neodymium and provided around a rotor yoke and an outside diameter of 45 mm to 55 mm, and a stator which has a stator core having twelve slots and an outside diameter of 75 mm to 85 mm and whose magnetomotive force at maximum current is 700 AT or more. The stator core is configured such that a teeth width b is 0.14 times or more of the outside diameter of the rotor.

Abstract: In a tandem AC generator for a vehicle having dual armature core-Lundel type field core pairs placed in series, an intermediate ring as a cylindrical spacer is placed between the dual armature cores. One armature core, the intermediate ring, and the other armature core are pressed and tightly fastened to each other in the direction of a rotary shaft by front and rear housings by a through bolt. A circumference wall part of the front housing accommodates one armature core and the intermediate ring completely and further accommodates a part of an outer circumference surface of the other armature core. This simple construction of the tandem AC generator provides improved and superior vibration proof.

Abstract: According to the present invention, an alternator includes a rotor, a stator, and at least one cooling fan. The rotor includes a rotary shaft, a field core, and a field coil. The field coil has first and second ends that are opposite to each other in an axial direction of the rotary shaft. The stator includes an armature core and an armature coil. The armature core has first and second ends that are opposite to each other in the axial direction. The first end of the armature core is closer to the first end than the second end of the field coil. An axial distance between the first and second ends of the field coil is less than that between the first and second ends of the armature core. The first end of the field coil protrudes outward from the first end of the armature core in the axial direction.

Abstract: An electrical energy generator with improved efficiency has a base on which is mounted an elastically deformable micromechanical element that has a section that is free to be displaced toward the base. An absorber of radioactively emitted particles is formed on the base or the displaceable section of the deformable element and a source is formed on the other of the displaceable section or the base facing the absorber across a small gap. The radioactive source emits charged particles such as electrons, resulting in a buildup of charge on the absorber, drawing the absorber and source together and storing mechanical energy as the deformable element is bent. When the force between the absorber and the source is sufficient to bring the absorber into effective electrical contact with the source, discharge of the charge between the source and absorber allows the deformable element to spring back, releasing the mechanical energy stored in the element.

Abstract: A method of operating a fuel injector including a piezoelectric actuator having a stack of piezoelectric elements, comprises applying a discharge current (IDISCHARGE) to the actuator for a discharge period so to discharge the stack from a first differential voltage level across the stack to a second, lower differential voltage level across the stack so as to initiate an injection event, and applying a charge current (ICHARGE) to the actuator for a charge period (T3 to T4?) so as to charge the stack from the second differential voltage level to a third differential voltage level so as to terminate the injection event. The method includes determining at least one engine parameter (e.g. common rail pressure) of the injection event prior to applying the charge current (ICHARGE) to the actuator and selecting the third differential voltage level in dependence on the at least one engine parameter.

Abstract: A method of operating a fuel injector having a piezoelectric actuator operable by applying a drive pulse thereto, wherein the drive pulse has a frequency domain signature. The method includes i) determining at least one resonant frequency of an injector installation in which the injector is received, in use, and ii) modifying the drive pulse such that a maximum of the frequency domain signature thereof is remote from the determined resonant frequency of the injector installation.

Abstract: A controller for controlling the operation of a fuel injector having a piezoelectric actuator which is operable by the application of a voltage drive profile across the actuator, the controller comprising inputs for receiving data relating to one or more engine parameters and a processor for determining a voltage drive profile for controlling the actuator in dependence upon the one or more engine parameters. The voltage drive profile is arranged to comprise an activating voltage component to initiate an injection event and a deactivating voltage component to terminate the injection event, the activating and deactivating voltage components being separated by a time interval TON. The controller further receives outputs for outputting the voltage drive profile as determined by the processor to the actuator, wherein the processor is arranged to set the time interval TON greater than or equal to a predetermined pressure wave time period (TP) of a pressure wave cycle within the injector.

Abstract: A motion amplifier (22) comprises piezoelectric diaphragm (30) and drive electronics (26) for applying a drive signal to the piezoelectric diaphragm. The motion amplifier preferably comprises (in addition to the piezoelectric diaphragm) a reaction mass (34) connected to the piezoelectric diaphragm; a reacted mass (40) connected to the piezoelectric diaphragm; and, a reacted mass spring (50, 270) for resiliently carrying the reacted mass. Motion or displacement of the piezoelectric diaphragm (30) is amplified to produce a greater displacement or motion of an actuator region or surface (46) of the reacted mass (40).

Abstract: A sonic or ultrasonic transducer, which is embodied as a radial oscillator. So that the sonic or ultrasonic transducer can be used at high temperatures, a matching layer is located between the radial oscillator and the atmosphere into which the ultrasonic signals are transmitted The matching layer is made from a material that has a dimensional stability up to a temperature which lies above the temperature at the installation location of the sonic or ultrasonic transducer. Furthermore, the matching layer is selected such that its material-specific coefficient of thermal expansion is greater than that of the materials of a piezoelectric unit and a coupling ring, and that the modulus of elasticity of the material of the matching layer is at least one order of magnitude smaller than that of the piezoelectric unit and/or the coupling ring.

Abstract: A piezoelectric device includes: a package including a first recessed part provided on a first surface of the package, a second recessed part provided on a second surface of the package, and a penetrating part passing partially from the first recessed part through the second recessed part; a piezoelectric element housed in the first recessed part; a lid disposed on the upper side of the first recessed part; an IC chip disposed and fixed in the second recessed part of the package so as to block a part of the penetrating part; and a sealing part provided to the second recessed part. The IC chip and the sealing part close up the penetrating part and the lid seals the first recessed part air-tightly. A piezoelectric device is provided. The piezoelectric device realizes thickness reduction thereof without undergoing warpage and breakage of an IC chip or a package thereof.

Abstract: A multi-layer piezoelectric element having excellent durability in which the amount of displacement does not change even after subjecting to continuous operation over a long period of time under a high voltage and a high pressure is provided.

Abstract: A portable tack room, including a method to make the same, commonly used in a typical horse trailer. The portable tackroom is a storage system made of a first vertical element having a first edge, a second edge, and a surface. The first edge of the first vertical element is removably attached to a second vertical element. The second edge of the first vertical element is attached to at least one rolling element. This storage system permits an organized and portable space to keep articles related to equine activity in a gooseneck trailer.

Abstract: A uniform display case for displaying a uniform and uniform decorations is disclosed. The uniform display case comprises a viewing pane seated within a frame and a display area visible through the viewing pane. In addition, at least a portion of the uniform is visible in the display area, wherein the portion of a uniform is mounted to a back panel, wherein the portion of the uniform is mounted so that portions of back, top and front of the uniform are visible in the display area and are in a plane which is substantially parallel to a vertical plane of the back panel.

Abstract: Natural stone counter tops and methods for making and using the counter tops are described. The counter tops are made from natural stone, including granite, but comprise pre-fabricated pieces that are substantially modular. The pre-fabricated pieces are manufactured with an integrated edge so that they can be quickly assembled to create a counter with an integrated exterior edge, without the need to make and install a separate exterior edge. The pre-fabricated pieces can be quickly manufactured and easily stored as inventory, allowing the counter tops to be quickly and easily installed without the wait and cost of custom ordering the counter tops.

Abstract: A storage unit having a frame, drawers and a carrying handle. When the unit is lifted by the handle, or the handle is moved to a position suitable for lifting the storage unit, the handle arms lift the bottom drawer of the stack of drawers which in turn lifts each of the above drawers relative to the frame. As each drawer rises, the clearance gap between adjacent drawers is reduced and the drawers are moved to a locked position where they are blocked by detents mounted on the inside of the frame. In an alternative embodiment (not shown), the handle is coupled to drawer locking slides instead of the bottom drawer and detents on the drawer locking slides engage with the drawers to lock them in the closed position as the drawer locking slides are moved relative to the frame.

Abstract: The present invention provides a grommet cover assembly for selectively substantially blocking view of at least one opening in a planar member surface. The assembly comprises a mounting coupler mounted to the planar member surface proximate the first opening and a cover. The cover includes a flat cover member and a cover coupler, wherein the cover member includes at least one supporting leg. The cover coupler links to the mounting coupler to provide a hinged axis the cover member is rotated around. Thus, when the cover member is adjacent the opening, at least a portion of the opening is blocked from view. Methods of use and assembly are also provided.

Abstract: The invention provides apparatus and systems for cabinet receptacles, including a horizontally swingable door and an interior floor with a receptacle support affixed to the inside surface of the door and a receptacle retained on the receptacle support in a position adjacent to the inside surface of the door. One or more wheels attached to the receptacle support engage the cabinet floor for substantially bearing the weight of the receptacle.

Abstract: A divider clip of a drawer divider assembly serves to readily couple intersecting rails of the assembly in a secure manner. A rib on the clip enters, during clip installation, a channel on a rail of the assembly to prevent upward accidental dislodgment of the clip. An upper end of the clip is of a resilient nature and of hook configuration with an end for biased contact with an inclined rail surface to urge the clip and the rib thereon upwardly to a locked position.

Abstract: Embodiments of the invention include methods and apparatus to reduce or prevent bridging in an ice storage bin. In one embodiment, a storage bin for ice with an apparatus to reduce or prevent bridging within the ice storage bin is provided. The apparatus can include a probe hole positioned above an access door and opening, and also above an internal baffle. The probe hole can be sized to receive a probe used to break up bridges or clumps of ice within the ice storage bin.

Abstract: The hinge assembly is provided with a projecting blade that is mounted on the pivotal post of the hinge assembly to abut the door mount of the hinge assembly. The blade is mounted by two shoulder screws that pass through a bracket secured within the post into rivet nuts mounted in the cover of the post. This arrangement rigidifies the mounting of the blade.

Abstract: Embodiments of the invention relate to systems and methods for providing a removable sliding access door for an ice storage bin. In one embodiment, an access door is provided for use with a storage bin. The access door can include protrusions that engage corresponding recesses on tracks located adjacent to an access opening of the storage bin. The sliding access door can permit a user to access or view the contents of storage bin, and can be easily removed from the storage bin without the use of tools.

Abstract: The light source comprises an emitter (4) which, by means of at least one antenna (3), creates an ultra high-frequency electromagnetic wave in a sealed chamber (1) and which provides the lamp with power. The chamber (1) has a wall that is transparent to light and contains a gas at low pressure. A permanent magnet (2) creates a static magnetic field inside the chamber (1). The respective values of the static magnetic field and of the frequency of the electromagnetic wave are determined such as to cause an electron cyclotron resonance inside the chamber (1). The emitter (4), antenna (3) and magnet (2) are disposed in relation to the chamber (1) in such a way as to free a solid angle of at least 2? steradians for the light. The antenna (3) can be disposed inside the chamber (1) and can, optionally, be formed by the magnet (2). The magnet is substantially enveloped by the chamber (1).

Abstract: The present invention relates to gated nanorod field emission devices, wherein such devices have relatively small emitter tip-to-gate distances, thereby providing a relatively high emitter tip density and low turn on voltage. Such methods employ a combination of traditional device processing techniques (lithography, etching, etc.) with electrochemical deposition of nanorods. These methods are relatively simple, cost-effective, and efficient; and they provide field emission devices that are suitable for use in x-ray imaging applications, lighting applications, flat panel field emission display (FED) applications, etc.

Abstract: A method of preparing a patterned carbon nanotube array a patterned carbon nanotube array prepared thereby are provided. The method includes forming carbon nanotubes in channels of porous templates, arranging the templates in a predetermined pattern on a substrate and selectively removing the templates to expose the carbon nanotubes.

Abstract: The invention relates to light emitting devices (2) with variable output color. More specifically, the inventions provides a color conversion cell (10) which can be positioned in front of a light source (4) in order to generate other color or color temperatures. Typically the light source is a light emitting diode (LED) which is power efficient but emits in a narrow and fixed spectra. The new colors are generated by photoluminescence in fluorescent dyes contained in the cell. The color converting of the cell is electrically controllable, preferably by controlling the orientation, density or distribution of the fluorescent dyes, or by controlling a pathlength of the light in the cell.

Abstract: A planar light source device and a manufacturing method therefor are provided. The planar light source device includes a first substrate, a second substrate disposed under the first substrate and in parallel therewith at a specific distance therefrom and having a plurality of protrusions on an upper surface thereof or a plurality of recessions on a lower surface of the second substrate. The plurality of protrusions or recessions is formed by sandblasting or etching. Between the first and second substrates, a dielectric layer, a plurality of discharging spaces, a plurality of metal electrodes, a first phosphor layer, a second phosphor layer, a plurality of ribs and a reflective layer are provided and the reflective layer is formed on upper surfaces of the protrusions or lower surfaces of the recessions.

Abstract: An image display device comprises: a front substrate having a fluorescent member for displaying an image, and a metal back for covering the fluorescent member; a rear substrate having an electron emission element; and a support frame disposed between the front substrate and the rear substrate. In the image display device, a thickness of the metal back is 55 nm or more and 120 nm or less, and at least the metal back is covered with a getter. Thus, since the metal back of the front substrate is covered with the getter, a time-dependent deterioration of luminance is small and a lifetime is long even if a potential of the metal back is high.

Abstract: The present invention provides a display device which arranges a face substrate having a phosphor screen and a back substrate having electrons sources in a matrix array, wherein an average film density of the phosphor film which constitutes the phosphor screen is set to a value which falls within a range from 2.0 g/cm2 to 3.4 g/cm2. Due to such a constitution, it is possible to achieve the high brightness and the prolonged lifetime of the phosphor screen of the planar image display device.