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| Number | Title | Issue Date |
| 8040006 | Motor rotor and electric power steering apparatus A motor rotor has a rotor yoke having a polygonal column structure, a plurality of magnet fixing sections formed on the lateral surface of the rotor yoke, segment magnets respectively fixed to the magnet fixing sections and extending in the axial direction of the ro... | 10/18/2011 |
| 7709987 | Magneto rotor A magneto rotor which has a cup-like rotor yoke, a plurality of magnets secured on an inner periphery of a peripheral wall portion of the rotor yoke, and a magnet protecting cover having a cylindrical portion that covers inner peripheries of the magnets, and an oute... | 05/04/2010 |
| 7573169 | Permanent magnet rotor A permanent magnet rotor having a shaft, a hollow cylindrical permanent magnet and an elastic connecting medium between the shaft and the permanent magnet. The permanent magnet is arranged co-axially around the shaft to ensure that the permanent magnet is mounted se... | 08/11/2009 |
| 7456539 | Rotor and method of manufacturing the same A rotor includes a rotor core fixedly provided on a shaft and having a hole, a magnet inserted into the hole, and a resin portion injected between the side surface of the hole and the side surface of the magnet and, the side surface of the magnet has a groove formed... | 11/25/2008 |
| 7423357 | Electric rotating machine An electric rotating machine which comprises: a magnet rotor which has a rotor yoke having a magnetic attachment surface extending in a peripheral direction, and multiple permanent magnets for constituting a magnetic field which are intermittently arranged in the pe... | 09/09/2008 |
| 7372181 | Rotor for brushless motor and brushless motor A rotor for a brushless motor which can securely prevent an idle running and a scattering of a magnet while restricting a manufacturing cost as low as possible. The rotor is provided with a sintered ring magnet in which not-ground recess portions are formed in an ax... | 05/13/2008 |
| 7362024 | Rotor of BLDC motor Disclosed is a rotor of a BLDC motor including a frame rotatably disposed on an inner circumference of a stator, rotor teeth connected to the outer circumference of the frame in the radial direction at regular intervals, and magnets fixed between the rotor teeth, an... | 04/22/2008 |
| 7348704 | Rotor of motor and manufacturing method thereof A rotor of a motor includes a cylindrical magnet having at least one first coupling portion at an inner circumferential surface of the cylindrical magnet; and a rotor core coupled with the cylindrical magnet, the rotor core having at least one second coupling portio... | 03/25/2008 |
| 7342338 | Permanent magnet electric motor with reduced cogging torque A permanent magnet electric motor 10 comprises a rotor 30 provided with two stages of permanent magnets in the axial direction on an outer circumferential face of a rotor iron core, and having a shaft shifted by a stage skew angle θr in electrical ang... | 03/11/2008 |
| 7327531 | Two-plane balance for spindle motors In a spindle hub configured for rotation about an axis, through holes extend from a first end of the spindle hub to a second end of the spindle hub. The through holes are generally parallel to the axis. A method of achieving two-plane balance of a disc pack assembly... | 02/05/2008 |
| 7268450 | Permanent magnet type generator A permanent magnet type generator includes a rotor having 4n (n is a positive integer) permanent magnet poles disposed in a circumferential direction of the rotor to have circumferential gap between adjoining poles and a stator that has 3n teeth and co... | 09/11/2007 |
| 7245054 | Permanent magnet electric machine having reduced cogging torque A permanent magnet electric machine includes a stator with salient stator poles. A rotor includes two or more axial rotor sections that are rotationally offset by an offset angle equal to the cogging angle divided by the number of axial rotor sections. The axial rot... | 07/17/2007 |
| 7219724 | Downhole magnetic retrieval tool A tool 10 for suspending in a well retrieves various metal debris from the well, and includes an elongate tool body 12 within a plurality of circumferentially shaped slots 14. Each slot having a radially outward portion with a circumferential wi... | 05/22/2007 |
| 7211917 | Motor with a magnet fixed on the inner peripheral face of a circumferential wall A motor includes a circumferential wall part of a case provided with an opening part on one end side in an axial direction and at least a magnet fixed to the inner peripheral face of the circumferential wall part. At least a part of the outer peripheral face of the ... | 05/01/2007 |
| 7193345 | Collecting and distributing ring for rotary electric machine stator A collection-distribution ring comprises three busbars, each having a circular ring shape, which are integrally connected together with prescribed distances therebetween by an insulating resin. Coil connection terminals project inwardly in a radial direction and are... | 03/20/2007 |
| 7164216 | Motor A motor includes a stator section with a two-phase structure having first and second stator assemblies disposed in an axial direction, and a plurality of pole teeth arranged at an electrical angle of 90 degrees along inner circumferences of the first and second stat... | 01/16/2007 |
| RE39416 | Structure of rotor for outer rotor type brushless motor The present invention relates to a structure of a rotor for a brushless motor which can improve structural stiffness, restrict noise generation by reducing vibration during the rotation, use cheap materials, reduce a fabrication cost by fabricating a back yoke and a... | 12/05/2006 |
| 7135947 | Hybrid microwave T-switch actuator A hybrid switch actuator having six positions that are stable in the absence of current and in which displacement occurs between an initial position and a target position under the action of a current. The actuator includes a stator and a rotationally moveable rotor... | 11/14/2006 |
| 7116026 | Adhesion structure for motor, having thickness determining means An adhesion structure of a motor that adheres a rotor having a first linear expansion coefficient and a magnet having a second linear expansion coefficient, which differs from the first linear expansion coefficient, with an adhesive agent. The adhesion structure inc... | 10/03/2006 |
| 7089043 | Self-rechargeable portable telephone A portable telephone includes a telephone body containing telephone circuitry, a rechargeable cell, and a power generation device having a magnet structure, a coil, and a rectifier for generating a direct current (D.C.) voltage to charge the rechargeable cell. The m... | 08/08/2006 |
| 7064468 | Brush-less motor using vernier structure A brush-less motor includes a rotor with a magnet alternately magnetized N pole and S pole in a rotating direction, and a core with plural salient poles on which coils are wound. The core faces the magnet to form a magnetic circuit. Each one of the salient poles are... | 06/20/2006 |
| 7057322 | Rotor for reluctance type rotating machine A rotor for a reluctance type rotating machine includes a rotor core formed by stacking a number of annular core materials each of which includes magnetic concave and convex portions alternately formed on an outer circumference thereof and a central through hole, th... | 06/06/2006 |
| 7049723 | DC motor The disclosure describes a DC motor including a rotor unit arranged within the motor body and has a cylindrical field magnet fixed to an outer surface of a holder. The holder has a rotating shaft press-fitted through the center, and the cylindrical field magnet has ... | 05/23/2006 |
| 7038343 | Field assembly for a motor and method of making same A cylindrical magnet ring assembly having a cylinder magnet flux ring (102) formed with a plurality of inwardly projecting anchors (108); a plurality of permanent magnets (104), wherein the magnet can be formed with step portions (112) in... | 05/02/2006 |
| 7002276 | Armature with coated laminate bundle An armature of the prior art has a lamination packet which leads to a high loss of magnetic flux in the lamination, since it completely encloses the magnets that are disposed in the lamination. An armature (1) of the invention comprises at least one la... | 02/21/2006 |
| 6998748 | Motor rotor and manufacturing method thereof A motor rotor includes a magnetic yoke and a rubber magnet located within the magnetic yoke. At least one pattern is formed on a surface of the rubber magnet, which faces the magnetic yoke. The manufacturing method of the motor rotor is to provide a rubber magnet ha... | 02/14/2006 |
| 6979924 | Compressor using a motor The invention relates to a motor comprising a stator core having plural teeth and slots provided among the teeth, a winding applied on the teeth by a single turn, and a rotor incorporating plural permanent magnets, which is rotated and driven by utilizing reluctance... | 12/27/2005 |
| 6974522 | Method and apparatus for mounting a plurality of magnet segments on a back ring A method and apparatus for assembling permanent magnet segments and a back ring wherein a fixture holds segments in circumaxially spaced relationship, adhesive is applied to the segments, externally from pressure sensitive adhesive tape and the fixture then expands ... | 12/13/2005 |
| 6975055 | Dynamo-electric machine having a rotor with first and second axially or rotationally displaceable field magnets A dynamo-electric machine has a stator with a primary winding and a rotor with a field magnet and a shaft. the field magnet includes a first field magnet having diferent polarity magnetic poles sequentially arranged in a rotation direction and a second field magnet ... | 12/13/2005 |
| 6960854 | Centrifugal turbine for breathing-aid devices The invention concerns an electric turbin (1) comprising a turbine rotor (4, 7), a turbine stator (2, 3), an electric motor member (5, 6) for driving the rotor (4, 7) in rotation relative to the stator (2, 3), and having the... | 11/01/2005 |
| 6956312 | Brushless DC motor and method of manufacturing brushless DC motor A brushless DC motor including a stator having plural slots; and a rotor which has plural permanent magnets and is divided into three rotor blocks in a rotation axis direction, the three rotor blocks being layered so that the arrangement angles of the rotor blocks d... | 10/18/2005 |
| 6944929 | Method of joining rubber magnet to yoke A plurality of grooves 25 are formed in an outer peripheral surface of a cylindrical rubber magnet 17. The grooves 25 extend in a direction in which the cylindrical rubber magnet 17 is inserted into a yoke 3. The grooves 25 ... | 09/20/2005 |
| 6911756 | Rotor core with magnets on the outer periphery of the core having a sine or trapezoidal wave A rotor for a motor includes a body formed by multiple silicon steel sheets securely abutting one another. Each silicon steel sheet has a series of apertures defined in an outer periphery thereof to define multiple grooves in an outer periphery of the body for recei... | 06/28/2005 |
| 6891295 | Flywheel magneto generator A flywheel magneto generator which comprises a rotor having a magnet attached to an outer circumferential side of a flywheel and a stator constructed by winding a generating coil around a core having a magnetic pole portion opposed to a magnetic pole of the rotor, w... | 05/10/2005 |
| 6873077 | Shell-shaped magnet Cup-shaped magnet for electric motors having two face surfaces, two lateral surface, and two top surfaces, which are curving between the face surfaces along the lateral surfaces, whereby the lateral faces are chamfered in a v-shape. ... | 03/29/2005 |
| 6815864 | AC generator An ac generator comprising a rotor coil for generating a magnetic flux, a pole core disposed to cover the rotor coil and having pawl-shaped magnetic poles projecting in staggered and alternating relationship, permanent magnets disposed on both side surfaces of the p... | 11/09/2004 |
| 6741002 | Motor having a rotor with interior split-permanent-magnet A motor includes a rotor with interior permanent magnets and a stator with teeth wound by concentrated windings. Each permanent magnet is split along a plane oriented towards the stator, and an electrically insulating section is set between the split magnet pieces. ... | 05/25/2004 |
| 6677692 | Rotor of small-sized motor A rotor (10) for a miniature electric motor includes a magnet (12) having a rotation axis (14) and a shaft (16) fixed concentrically to the magnet. The magnet (12) includes a through hole (20) extending coaxially with the rotation axis (14). The shaft (16... | 01/13/2004 |
| 6570288 | Outer rotor type brushless direct current motor An outer rotor type brushless direct current motor has an outer rotor including a plurality of permanent magnets attached along the inner circumference of an annular yoke such that the magnetic poles face the S magnetic poles. Thin sections are formed by ... | 05/27/2003 |
| 6552459 | Permanent magnet rotor design A rotor assembly is comprised of a rotor core and at least one magnet. The rotor core has a support protrusion projecting radially outwardly from the core exterior surface. The at least one magnet is positioned on the support protrusion and is supported i... | 04/22/2003 |
