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| Number | Title | Issue Date |
| 7919898 | Rotor core assembly for electric motor A rotor core assembly for an electric motor includes a stack of laminations and first and second end plates disposed at opposite ends of the stack of laminations. A plurality of concentric fastener holes extend through the laminations and the end plates for receivin... | 04/05/2011 |
| 7365465 | Securing assembly of bandages for synchronous motors with outer permanent magnets A rotor structure for an electric motor includes a cylindrical rotor core assembly and a plurality of permanent magnets disposed on an outer circumference of the rotor core assembly. Wrapped around the rotor core assembly is a bandage to secure the permanent magnets... | 04/29/2008 |
| 7342341 | Rotor for electrical rotating machines A rotor for electrical rotating machines includes a rotor core with axial grooves for receiving axial conductors. A first element on the axial grooves and a corresponding second element on the axial conductors interact with one another to fix the axial conductors in... | 03/11/2008 |
| 7336013 | High mechanical strength electrical connection system and method In accordance with one embodiment, the present technique provides a bushing that is configured to electrically and mechanically couple a conductor bar of a rotor assembly to an end ring of the rotor assembly. The exemplary bushing has an interior surface that is con... | 02/26/2008 |
| 7122931 | Generator rotor An improved generator rotor (30) and a method of repairing an existing generator rotor (12) are disclosed. Methods consistent with the present invention provide techniques for repairing existing stress-damaged rotors (12) to remove stress-induce... | 10/17/2006 |
| 7122932 | Rotor for an induction device According to one embodiment, the present invention provides a rotor assembly. The exemplary rotor assembly includes a plurality of rotor laminations, which cooperate to form a rotor core, capped at each end by end members. Extending through the rotor core and the en... | 10/17/2006 |
| 7109626 | Compact dynamoelectric machine A compact dynamoelectric machine having a rotor with a length which is less than the length of a corresponding stator core. The rotor is rotatable on a shaft supported by bearings, with at least one of the bearings being positioned longitudinally within the stator c... | 09/19/2006 |
| 7098569 | Rotor assembly for a permanent magnet power electric machine 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 roto... | 08/29/2006 |
| 7095821 | Non-rusting and non-particulating imaging X-ray tube rotor assembly An rotor assembly (30) for an imaging X-ray tube (32) is provided. The imaging X-ray tube rotor assembly (30) includes at least partially a magnetic non-corrosive material. A method of producing the imaging tube X-ray rotor assembly (30) ... | 08/22/2006 |
| 7030535 | High temperature superconducting synchronous rotor coil having multi-piece rotor core A rotor core and winding assembly including: separable rotor core sections assembled to form the rotor core, where the core sections each have a substantially circular perimeter and are axially aligned when assembled as the core, and the winding assembly includes a ... | 04/18/2006 |
| 7019428 | Induction motor and rotor therefor A rotor for an induction motor. The rotor includes a core, a pair of end rings, and a plurality of aluminum conducting members. The core includes a plurality of accommodating holes that are aligned circumferentially in a peripheral portion of the core. The accommoda... | 03/28/2006 |
| 6984910 | Generator with composite rotor coil retention components A coil retention system for a rotor of an electrical generator, such as an aircraft generator, that includes one or more components made of a high strength, lightweight composite material. By making one or more of the coil retention system components of a high stren... | 01/10/2006 |
| 6979928 | Axial retention feature for restraining composite reinforcing rings A magnetic shield assembly for confining rotor windings in a generator includes a substantially cylindrical tubular shield of two or more part-annular segments adapted to enclose the rotor windings; a plurality of axially spaced rings located on the tubular shield; ... | 12/27/2005 |
| 6979929 | System and method for retaining wedges in a rotor A rotor with wedges and a method of retaining wedges in a rotor are disclosed. The rotor includes a shaft, first and second poles extending radially from the shaft, and first and second coils of windings respectively wrapped around the first and second poles. Each c... | 12/27/2005 |
| 6977459 | Apparatus and methods for anchoring a modular winding to a rotor in an electrical machine Locking strips secure winding modules to a rotor. The locking strips have paired deep and shallow recesses along a long edge and are disposed in a groove along the rotor. Upon assembly of the winding module, the deep recesses of the locking strips are aligned, enabl... | 12/20/2005 |
| 6977460 | Spacer for axial spacing enclosure rings and shields in an electrical machine Grooves are formed in the pole faces of a multi-pole rotor body. Spacers are provided for insertion into the grooves and have radial outward projections for engaging between shield segments and enclosure rings. By providing spacers with variable width projections, t... | 12/20/2005 |
| 6975057 | Rotary electric machine having a stator made up of sectors assembled together The invention relates to a rotary electric machine including a stator, powered by a polyphase current, having a magnetic circuit with teeth forming intervening slots for receiving electrical conductors. The magnetic circuit is made up of an assembly of sectors defin... | 12/13/2005 |
| 6952070 | Capped flat end windings in an electrical machine End windings of the field windings of a generator rotor body are flattened. A cap having a flat undersurface overlies the flattened end windings and an enclosure ring extends about the end windings and cap. Apertures are formed through the cap in communication with ... | 10/04/2005 |
| 6940196 | High-speed rotor A high-speed rotor, in particular a permanent-magnet rotor (1) for dynamoelectric machines of high power density, and also its production are proposed. The permanent-magnet rotor (1) comprises a spindle (2) and armouring (4) coaxial with ... | 09/06/2005 |
| 6885120 | Structural enclosed rotor configuration for electric machine A rotor configuration for an electric machine includes a rotor shaft and a multi-pole rotor core secured to the rotor shaft. A plurality of field winding modules are respectively disposed over each pole of the multi-pole rotor core. An enclosure is disposed over the... | 04/26/2005 |
| 6844655 | Expandable flat winding for rotating electric machine fields A winding module for an electric machine is provided wherein the winding module comprises a flat field winding that is angled at an end turn and wherein a vertex of the flat field winding is aligned with an axis of rotation. The vertex provides a predetermined axial... | 01/18/2005 |
| 6791230 | System and method for retaining wedges in a rotor A rotor with wedges and a method of retaining wedges in a rotor are disclosed. The rotor includes a shaft, first and second poles extending radially from the shaft, and first and second coils of windings respectively wrapped around the first and second poles. Each c... | 09/14/2004 |
| 6759771 | High speed generator with integrally formed rotor coil support wedges A coil support wedge for a high speed generator is integrally constructed and includes a plurality of flow passageways. Because it is integrally formed, the support wedge is substantially fluid tight. Thus, it is less susceptible to cooling fluid leakage from the fl... | 07/06/2004 |
| 6751842 | Method of constructing a rotor for use in a high speed controlled-pole electric machine A method of constructing a rotor for use in a high speed controlled-pole electric machine includes the steps of positioning an inner layer of remagnetizable permanent magnetic material over substantially an entire circumference of a rotor core exterior surface, and ... | 06/22/2004 |
| 6703744 | Generator-motor for vehicle A generator-motor for a vehicle includes a rotor having a rotor core and a plurality of permanent magnets and a stator having a stator core and an armature winding. The rotor core has a plurality of axially extending through-holes in a circumferential dir... | 03/09/2004 |
| 6703733 | Removable self-locking field winding block A multi-pole electric machine rotor assembly includes a rotor forging including a rotor body having poles 13 with pole faces and a winding module including a plurality of field windings positioned adjacent the pole faces and winding insulators disposed be... | 03/09/2004 |
| 6657330 | Turbo generator with a rotor with direct gas cooling In a turbo generator with a rotor with direct gas cooling, which rotor is provided with a rotor winding arranged around a central rotor body, said rotor winding being on the front sides covered by one each annular cap plate, and in which rotor cold coolin... | 12/02/2003 |
| 6630765 | Coil lead and terminal securement caps for securing wires of a rotor An electric machine having a rotor carrying a field coil has a fan and slip ring assembly. The slip ring assembly is axially remote from the fan portion, the slip ring assembly being electrically connected to the field coil. The point of connection betwee... | 10/07/2003 |
| 6495942 | Non-metallic structural rotor enclosure A non-metallic structural enclosure for a generator rotor replaces conventional containment components including rotor wedges, rotor teeth and retaining rings. The enclosure includes a non-metallic tube formed of a plurality of spaced rings or of a contin... | 12/17/2002 |
| 6492754 | Magnet retention channel arrangement for high speed operation In the magnet retention channel arrangement for a high speed rotor described in the specification, a rotor has an array of radially projecting, angularly spaced pole pieces and a magnet retention channel arrangement inserted between each adjacent pair of ... | 12/10/2002 |
| 6424063 | Generator rotor lead path configuration A generator rotor lead path configuration includes a plurality of electrically conductive components attached to each other. These components may include a cleat and a wedge. The improved lead path inhibits, if not prevents, lead path failure. A method of... | 07/23/2002 |
| 6359359 | Permanent magnet motor A rotor piece has a plurality of holes 12. Each hole holds therein a plurality of substantially divided permanent magnets 14 that are arranged in a circumferential direction. Therefore, each permanent magnet is small and the flow passage of eddy currents ... | 03/19/2002 |
| 6351053 | Reluctance motors A reluctance motor is described in which stator coils are driven with sinusoidal, or substantially sinusoidal, waveforms. Preferably, the spread angle of the stator poles is less that the spread angle of the rotor poles. More preferably, the spread angles... | 02/26/2002 |
| 6204589 | Strain-matched hub for motor/generator A strain-matched hub for a motor/generator. The motor/generator preferably includes a cylindrical rotor surrounding a stator, and of larger diameter than a shaft. The hub, formed of a single material, connects the shaft to the rotor assembly, and contains... | 03/20/2001 |
| 6184606 | Rotor for an electric machine and a method in an electric machine A solid rotor for an electric machine includes a short circuit ring of a metal material having good electrical conductivity. The short circuit ring is attached to an end face of the rotor, and includes at least two portions formed of different materials. ... | 02/06/2001 |
| 6172439 | Motor rotor using a cylindrical yoke with slit A cylindrical yoke 8 bonded to an inner surface 44 of a cylindrical portion 43 of a rotor case 40 of a motor has a yoke separating slit 85 for separating the yoke 8 in the circumferential direction. A cylindrical rotor magnet 9 is partially bonded to an i... | 01/09/2001 |
| 6127762 | Rotor A rotor (1) is of a substantially spherical shape with one complete half of the sphere (2) still remaining. The rotor (1) effective takes the shape of the head of a "mushroom." The other half of the sphere has had its material removed or omitted forming t... | 10/03/2000 |
| 5986380 | Mechanical constraints for tapered end turns of a generator rotor An end turn arrangement for turns in a rotor where individual windings are stacked in tapered radial slots in the rotor, with successive turns having a smaller width in a radial inward direction, the end turns of the individual turns of each stack being v... | 11/16/1999 |
| 5952764 | Cage rotor having reinforcing members that prevent deformation of end rings at moderately high rotation speeds In a cage rotor for an induction motor, a end ring (22) for connecting conductive rods (20) to one another is covered with a reinforcing member (24). The reinforcing member (24) is obtained by integrally forming a tube-like portion (26) having an inner di... | 09/14/1999 |
| 5946122 | Rotating device and light beam deflecting apparatus In a rotating device which comprises a rotor; a radial bearing; a lower thrust bearing; a dynamic pressure generating means, a radial bearing area (mm2) which is the area of the rotor facing the radial bearing, a thrust bearing area (mm2 | 08/31/1999 |
