Patents Examined by I. A. Mohandesi
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Patent number: 7221127Abstract: The alternator comprises a wound rotor and a stator with a number of phases connected to a rectifier bridge equipped with switches (7) in the form of MOS type transistors, such as MOSFET type transistors, characterised in that the transistors (7) are voltage-rated to work by avalanche effect or linearly in the case of a load dump.Type: GrantFiled: October 9, 2002Date of Patent: May 22, 2007Assignee: Valeo Equipements Electriques MoteurInventors: Philippe Masson, Michaël Chemin, Thierry Mandion
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Patent number: 7218019Abstract: A linear reluctance motor including a stator with a set of spaced blades each extending in the direction of the actuation axis, each blade including a plurality of alternating low permeability and high permeability teeth. A shuttle also includes a set of spaced blades each extending in the direction of the actuation axis interleaved with the blades of the stator, each blade of the shuttle also including a plurality of alternating low permeability and high permeability teeth. An active component is associated with either the stator, the shuttle, or both. The active component is divided into at least N phases, each phase including a set of blades, a flux return portion, and a coil wound to produce flux through the sets of interleaved blades in a direction substantially transverse to the actuation axis.Type: GrantFiled: December 3, 2003Date of Patent: May 15, 2007Assignee: Foster-Miller, IncInventor: Steven D. Potter
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Patent number: 7218012Abstract: An emergency pitch drive power supply is provided, the emergency pitch drive power supply comprising an auxiliary generator for producing electric power, wherein the auxiliary generator is a permanently excited multi-pole generator adapted to generate sufficient power for a pitch drive of a wind turbine when driven with wind rotor speed, and wherein the auxiliary generator is connected to at least one pitch drive motor of the wind turbine.Type: GrantFiled: May 31, 2006Date of Patent: May 15, 2007Assignee: General Electric CompanyInventor: Thomas Edenfeld
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Patent number: 6917126Abstract: A sliding means with built-in moving-magnet linear motor is provided, realizing high-speed operation and much response ability of a table to a stationary bed, and also accurate position control of the table to the bed. With the sliding means of this invention, armature windings carry a three-phase current while a driving circuit is transferred to the external driver to make the bed slim in construction. Thus, the sliding means is reduced in overall height. A field magnet of rare earth permanent magnet is effective in raising flux density, thereby providing high propulsion for the table. An encoder to monitor a position of the table is an optical encoder having an optical linear scale, which contributes to improvement in accurate monitoring. The construction in which the armature windings connected to cords, lines, and so on are placed on the stator side has no fear of causing dust and dirt, thus realizing clean environment.Type: GrantFiled: June 4, 2001Date of Patent: July 12, 2005Assignee: Nippon Thompson Co., Ltd.Inventors: Takaaki Tsuboi, Shoji Fujisawa, Masaki Ohno
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Patent number: 6597078Abstract: An electric power steering system for a vehicle includes a steering wheel and a steering shaft that is connected to the steering wheel. A worm gear is connected to the steering shaft. A worm is threadably engaged to the worm gear. A permanent magnet motor is connected to the worm. The permanent magnet motor includes a stator with twelve slots and a rotor with ten poles. The rotor includes one or more axial rotor sections. If more than one axial rotor section is employed, the axial rotor sections are rotationally offset. The axial rotor sections are rotationally offset by an offset angle that is equal to a cogging angle divided by the number of axial rotor sections. The rotor includes breadloaf, spoke, radial or arc permanent magnets.Type: GrantFiled: January 30, 2001Date of Patent: July 22, 2003Assignee: Emerson Electric Co.Inventors: Alan D. Crapo, Todd A. Walls, Richard E. Hartsfield, Jr.
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Patent number: 6566776Abstract: The invention relates to a spindle motor having a sealing support film which prevents exchange of air between the interior and surroundings of the spindle motor. In spindle motors for hard disk drives it is extremely important to construct the spindle motor so that it is sealed tight against the external environment, ie so that from the connecting side of the spindle motor no admission of air to the interior of the spindle motor can occur. A further characteristic of the invention consists in that the support film is bonded and fixed in place in sealing manner by means of an adhesive which does not give off gas or does so only very slightly.Type: GrantFiled: March 20, 2001Date of Patent: May 20, 2003Assignee: Precision Motors Deutsche Minebea GmbHInventors: Jörg Hoffmann, Thilo Rehm
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Patent number: 6545378Abstract: An electric spindle motor for use in precision instruments such as hard disk drives comprises a stationary sub-assembly and a rotary sub-assembly movable relative to the stationary sub-assembly for carrying magnetic disks. The electric spindle motor has an integrated bearing system including a hydrodynamic journal bearing for providing desired radial load and a magnetic bearing for reducing friction resistance during staring/stopping and running of the electric spindle motor. The rotary sub-assembly is suspended from the stationary sub-assembly by the activation of the magnetic bearing during the rotating of the electric spindle motor. The electric spindle motor having integrated hydrodynamic journal bearing and magnetic bearing of the present invention is capable of high speed and high accuracy running, providing increased radial load and stiffness, and reduces the friction resistance therefore improves the performance and power saving.Type: GrantFiled: December 21, 2001Date of Patent: April 8, 2003Assignee: Data Storage InstituteInventors: Shixin Chen, Qide Zhang
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Patent number: 6541888Abstract: A winding body has a winding area (31) for a winding (13), which winding area (31) is formed by a winding carrier (32) and two legs (34, 35) which define the winding area (31) in axial direction (L) and are connected with the winding carrier (32). The winding carrier (32) has a locking device (40) for locking the winding body (30) at a winding tooth (24). Further, a temperature sensor (50) for measuring the temperature in a coil (25) can be provided in the winding body (30). The winding body (30) has a receiving area (36) for a connection device (70) for the windings (13), wherein the receiving area (36) is formed by one of the legs (35), an elongation area (33) of the winding carrier (32) extending beyond this leg (35), and a fixing leg (60) at a distance from the leg (35).Type: GrantFiled: January 19, 2001Date of Patent: April 1, 2003Assignee: Mannesmann Sachs AGInventors: Marcus van Heyden, Horst Oppitz, Jens Baumeister, Edmund Grau
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Patent number: 6486575Abstract: A molded rotor block, as well as other molded articles of manufacture, are made from a resin material selected from the group consisting of epoxy thermosets, polyester thermosets, phenolic, and melamine; and a reinforcement material selected from the group consisting of glass and mineral filler. The article of manufacture is adapted to withstand temperatures that range from about −40° C. to about 180° C.−40° C. and to withstand centrifugal loading at about 1500 RPM to about 4500 RPM while functioning as an insulator. The molding operation provides many advantages over CNC machining and other manufacturing methods.Type: GrantFiled: January 16, 2001Date of Patent: November 26, 2002Inventor: Mark Lee Miller
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Patent number: 6479907Abstract: In a plant for generating electric power through at least two generators separately driven by wind power and feeding an alternating voltage to an alternating voltage line in common, a converter is adapted to convert the alternating voltage into direct voltage and conversely. The plant has means (29, 30) adapted to measure the total power fed towards the converter from the wind power generators and members (32) adapted to send orders to a unit (14) adapted to control the converter (9) for adjusting the control thereof depending upon power values delivered by said means to such a frequency that a power maximum is obtained.Type: GrantFiled: October 25, 2000Date of Patent: November 12, 2002Assignee: ABB ABInventors: Kjell Eriksson, Sune Wik
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Patent number: 6465927Abstract: A miniature electric motor comprises a housing, a cover plate fitted in an opening portion of the housing, a stator fixed to an inner circumferential surface of the housing, a rotor supported rotatably to one and the other bearing portions mounted on the housing and the cover plate, respectively, the rotor being disposed in the housing, and a brush holder holding brushes slidingly engaging with a commutator of the rotor, the brush holder being mounted on the cover plate. A first projection is formed in the vicinity of a center of the brush holder, and the first projection is forcibly pressed at a predetermined pressure against the cover plate. According to the present invention, without using any vibration proof elastic member, it is possible to reduce a noise of the miniature motor and keep the motor quiet. This motor is used for driving an air conditioner of an automobile, or the like.Type: GrantFiled: October 23, 2001Date of Patent: October 15, 2002Assignee: Mabuchi Motor Co., Ltd.Inventors: Kenji Shiraki, Hideki Itaya
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Patent number: 6410999Abstract: Actuator elements of a motor system are cyclically expanded magnetostrictively by energization of excitation coils to impart driving forces directly to a driven load through roller sprag means under preload bias in locking contact with a race formation in the driven load, to impart unidirectional movement to the driven load in one direction selected by generated Lorentz forces through magnetic field controlling means, as well as to provide power-off braking.Type: GrantFiled: November 9, 2000Date of Patent: June 25, 2002Assignee: The United States of America as represented by the Secretary of the NavyInventors: John M. Vranish, Joseph P. Teter