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| Number | Title | Issue Date |
| 7626310 | Rotor of an electrical machine An arrangement in a rotor of an electrical machine; the rotor (5) rotates around its axis of rotation and comprises of, at least, the frame (13) and coils (15), which are projected as coil ends (11). There are protruding beams (17,18 | 12/01/2009 |
| 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 |
| 7339293 | Electric machine with a wrapped winding cooled to a low temperature An electric machine has a rotor that is rotatable about an axis of rotation, and an especially superconducting winding which is to be cooled to a low temperature. The winding is enveloped by a securing means with a wrap. The outer contour of the wrap of the securing... | 03/04/2008 |
| 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 |
| 7086137 | Rotor assembly method A rotor and a method of constructing a rotor are disclosed. The rotor includes a hub that is capable of being supported by a shaft that extends along an axis, a plurality of laminations, and a plurality of wire windings supported by the plurality of laminations. The... | 08/08/2006 |
| 7057326 | Rotor body containment shell with reduced windage losses A rotor body assembly includes a rotor and a containment shell surrounding the rotor, the containment shell having an external peripheral surface provided with a plurality of surface deformations. ... | 06/06/2006 |
| 6995489 | Electric machine An electric machine (2) comprising a rotor (4) and a stator (6) arranged coaxially therewith, at least one of said rotor (4) and stator (6) being formed of a plurality of parts and there being provided a bandage (16) holding... | 02/07/2006 |
| 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 |
| 6941639 | Method for repairing 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... | 09/13/2005 |
| 6930434 | Generator rotor pole crossover The present invention increases the life of a pole crossover while minimizing the need for timely inspections and costly replacements. The present invention splits the pole crossover band 4 at one or more locations along its circumference and then joins the m... | 08/16/2005 |
| 6836954 | Rotor for an electronically commutated motor and improved method for the mass production thereof Rotor for an electric motor that comprises a core (1), segments of a cylinder (5, 6, 7) made of magnetizable materials, a substantially cylindrical retaining wrapper (10) whose end portions are joined to at least a pair of plane elements (8, ... | 01/04/2005 |
| 6794773 | Winding restraint on wound rotor generators or motors and method for forming the same An electric machine and method for forming the same comprises a rotor, a rotor winding disposed on the rotor and having a body portion and end turn portions, and a non-metallic cylinder arranged around the rotor to restrain both the body portion and the end turn por... | 09/21/2004 |
| 6768232 | High temperature superconductor rotor for a synchronous machine A high temperature superconducting rotor for a synchronous machine includes a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconducting field winding, and a thermal reserve concentrical... | 07/27/2004 |
| 6724124 | Rotary electric machine having collar for restricting coil end expansion In a rotary electric machine, a collar for restricting expansion of coil ends includes a boss fitted on an armature rotation shaft, a flange radially extending from the boss and a pressing portion for pressing coil ends toward an armature core. The thickness of the ... | 04/20/2004 |
| 6566780 | Rotary electric machine having reinforcing ring on armature In an armature, a slot insulation paper provided in a slot of an armature core protrudes from an insulation plate in the axial direction. A part of the slot insulation paper that faces an outer peripheral surface of a coil end is cut out to expose the out... | 05/20/2003 |
| 6566785 | Retaining ring locking key groove A retaining ring for a rotor assembly has inboard and outboard ends. Each of the inboard and outboard ends is formed with a locking key groove open in a radially inward direction, each groove having a base representing a maximum depth of the groove, and a... | 05/20/2003 |
| 6509667 | Rotor for a reluctance motor A reluctance rotor and method for manufacturing reluctance rotors having soft magnetic regions and regions with magnetic properties that are dissimilar to those of the soft magnetic region so as to create a flux barrier. The method generally entails produ... | 01/21/2003 |
| 6509664 | Hybrid synchronous machines comprising permanent magnets and excitation windings in cylindrical element slots A hybrid synchronous machine includes a cylindrical element having slots; excitation windings situated in at least some of the slots; and permanent magnets situated in at least some of the slots, the permanent magnets comprising radially magnetized perman... | 01/21/2003 |
| 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 |
| 6181042 | Method for preventing corona surface damage in end windings of air-cooled motors and generators An end winding (10) of a high voltage air-cooled ac generator or motor is made more resistant to surface deterioration by corona activity by using a paint whose binder contains at least 20% by weight silicone. An end winding, including its insulated condu... | 01/30/2001 |
| 6150747 | Composite stator and rotor for an electric motor In the embodiments described in the specification, a stator for an electric motor has an outer ring member made of resin material and supported from a frame by stator caps and a flanged inner composite ring member made of resin material which receives a s... | 11/21/2000 |
| 6140719 | High temperature superconducting rotor for a synchronous machine A high temperature superconducting rotor for a synchronous machine includes a high temperature superconducting field winding, a field winding support concentrically arranged about the high temperature superconducting field winding, and a thermal reserve c... | 10/31/2000 |
| 6072252 | Composite electric motor shaft A composite electric motor shaft including axially distributed metallic and nonmetallic sections joined together exhibit increased mechanical damping, increased rotor critical speed, improved corrosion resistance and improved motor performance.... | 06/06/2000 |
| 6064136 | Armature and method for manufacturing same An armature in which a commutator and a lead-out section are firmly joined and satisfactory insulation is secured between an armature core and an armature coil. An armature (11) is equipped with: a shaft (2); an armature core (3) secured to the shaft (2);... | 05/16/2000 |
| 6064134 | Rotor for a synchronous reluctance machine A rotor assembly for a synchronous reluctance machine has a plurality of steel punched star-shaped supports secured along a shaft at spaced locations for retaining a plurality of laminated rotor sections. The star-shaped supports have four equiangularly s... | 05/16/2000 |
| 6037695 | Vehicle alternator having improved rotating yoke An alternator for a vehicle, including a rotating yoke composed of a pair of hook-shaped magnetic poles arranged in facing relation to each other and being concentrically attached to a shaft, a magnetic-field winding for generating a magnetizing force in ... | 03/14/2000 |
| 6029338 | Binding for winding overhangs of rotors of electric machines, and method of producing bindings for winding overhangs In a binding (19) for winding overhangs (20) of rotors (1) of electric machines, essentially comprising a plastic matrix with fibrous material embedded therein, the binding (19) is formed by winding a fiber tape (15) onto the winding overhang (20). The pl... | 02/29/2000 |
| 6026558 | Method for manufacturing armature of rotating electric machine An armature for an electric rotating machine has a plurality of outer coil elements and a plurality of inner coil elements. Each of the coil elements has end protrusions extending axially outwardly from an axial side of an armature. The end protrusions fa... | 02/22/2000 |
| 6018209 | Rotary electric machine having resilient fixing cap An upper coil bar and lower coil bar are disposed in slots of an armature core. The upper coil bars have upper coil-end sections which extend radially from the outer periphery of the armature core and together form a commutator surface with which a brush ... | 01/25/2000 |
| 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 |
| 5926939 | Method for securing a generator end winding system In an electrodynamic apparatus, a method of securing a coil basket of the type that includes a plurality of top coils and a plurality of bottom coils to a bracing assembly that includes a plurality of support braces includes steps of banding the top coil,... | 07/27/1999 |
| 5900689 | Binding for winding overhangs of rotors of electric machines, and method of producing bindings for winding overhangs In a binding (19) for winding overhangs (20) of rotors (1) of electric machines, essentially comprising a plastic matrix with fibrous material embedded therein, the binding (19) is formed by winding a fiber tape (15) onto the winding overhang (20). The pl... | 05/04/1999 |
| 5892313 | Rotating electrical machine with permanent magnet inserts In one embodiment of the present invention, a rotor for an electrical machine comprises a first pole piece and a second pole piece together defining an axis of rotation of the rotor, each pole piece comprising a generally disc-shaped body having a circumf... | 04/06/1999 |
| 5883456 | Generator rotor and method for eliminating keyway stress cracks in same A method for repairing stress-induced cracks in a generator rotor keyway is disclosed. The method comprises disassembling the retaining ring and ring key from the rotor, and machining away the crack and surrounding rotor metal from the rotor keyway. The m... | 03/16/1999 |
| 5861698 | Generator rotor with ring key that reduces tooth top stress A generator rotor that reduces friction force transmitted to rotor teeth by a retaining ring is disclosed. The friction force is caused by end windings pushing longitudinally outward against the retaining ring when the windings heat up during operation of... | 01/19/1999 |
| 5801470 | Rotors with retaining cylinders and reduced harmonic field effect losses A rotor includes a shaft; a permanent magnet layer; and a retainer comprising a conductive, low magnetic permeability material bound to the rotor shaft. The permanent magnet layer is semi-restricted between the shaft and the retainer. In one embodiment, t... | 09/01/1998 |
| 5798593 | Solid rotor assembly An induction motor includes a stator defining stator inner and stator outer diameters extending about a longitudinal axis, the stator includes a plurality of windings extending longitudinally and circumferentially about the longitudinal axis between the s... | 08/25/1998 |
| 5796190 | Engine-driven permanent magnetic type welding generator Disclosed is an engine-driven welding generator using a plurality of neodymium-iron-boron based rare earth magnets and provided with countermeasures for suppressing a rise in temperature of the magnets. The engine-driven welding generator driven by an eng... | 08/18/1998 |
| 5736804 | Reinforcement ring for rotating bodies and method of producing the same A reinforcement ring (10) for rotating bodies, for example commutators, comprises at least one metal ring (12) having a rectangular cross-section and a fiberglass ring (14) having a rectangular cross-section, the metal ring and the fiberglass ring both be... | 04/07/1998 |
| 5731651 | Rotor for an electromotive tool motor A motor rotor for use in a grinder or other electromotive tool in which a motor winding is prevented from being damaged by collisions with particles. The motor rotor is composed of a core having sixteen teeth extending radially relative to a rotation shaf... | 03/24/1998 |
