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| Number | Title | Issue Date |
| 8120226 | Methods and apparatus for an electric machine with a cast rotor A squirrel cage rotor structure used in connection with an electrical machine is formed from a high-strength, high-conductivity, and heat-treatable aluminum alloy, e.g., a T61 tempered aluminum alloy, such as A6101-T61. The resulting structure has improved strength ... | 02/21/2012 |
| 7919895 | Squirrel-cage rotor of an asynchronous machine The invention relates to an asynchronous motor comprising a stator or a cage rotor, said cage rotor comprising a shaft (1) and a laminated bundle (2) and rotor rods (3) are arranged within the laminated bundle, running through the openings (1... | 04/05/2011 |
| 7898138 | Rotary electric machine In a rotary electric machine, for enhancing the reliability and reducing the size thereof, the rotary electric machine comprises a stator, and a rotor opposed to the stator and adapted to be rotated around a shaft, the rotor having an iron core formed therein with a... | 03/01/2011 |
| 7893589 | AC-induction-motor rotor lamination having rotor slots An AC-induction-motor rotor lamination has a longitudinal axis and circumferentially spaced apart and closed rotor slots. Each rotor slot includes first through fifth corners, a straight slot base, straight first and second slot sides, and first and second curved si... | 02/22/2011 |
| 7851961 | System and method with a rotor having parallel sided rotor bars The present invention relates generally to motor rotors. More particularly, the invention encompasses a motor rotor having at least one rotor bar. The invention also includes a system and method with a rotor having parallel sided rotor bars. The rotor bar preferably... | 12/14/2010 |
| 7701105 | Cryogenic pumping systems, rotors, and methods for pumping cryogenic fluids A cryogenic pumping system for pumping a cryogenic fluid generally includes a rotor having a plurality of slots. The rotor includes at least one endring defining a plurality of openings. Each opening is aligned with a different one of the slots. A plurality of rotor... | 04/20/2010 |
| 7646128 | Rotor for electric motor, compressor unit provided with rotor, method for producing a rotor for an electric motor A rotor for an electric motor according to the invention comprises a substantially cylindrical core, conductive rods and two short-circuit rings. The cylindrical core is formed from a core material and provided with a plurality of longitudinal grooves which extend s... | 01/12/2010 |
| 7642685 | Induction machine An electric rotating machine comprises: a stator in which a coil is wound on a plurality of teeth in concentrated winding, and the coil is connected to a three-phase power supply; and a rotor disposed in opposition to the teeth of the stator; wherein a ratio between... | 01/05/2010 |
| 7508107 | High current rotating exciter A rotor for an exciter to be used to energize the field winding of a generator-rotor of a generator, the rotor defining an axis and including at least two conductor bars aligned substantially parallel to the axis. The bars are connected on their first axial end to o... | 03/24/2009 |
| 7504756 | High strength induction machine, rotor, rotor cage end ring and bar joint, rotor end ring, and related methods A high strength induction machine, rotor, rotor cage end ring and bar joint, rotor end ring, and related methods are provided. An embodiment of an end ring and bar joint includes a main body adapted to substantially surround a rotor shaft when mounted thereto, a plu... | 03/17/2009 |
| 7495364 | Cryogenic pumping systems, rotors and methods for pumping cryogenic fluids A cryogenic pumping system for pumping a cryogenic fluid generally includes a rotor having a plurality of slots. The rotor includes at least one endring defining a plurality of openings. Each opening is aligned with a different one of the slots. A plurality of rotor... | 02/24/2009 |
| 7437882 | Apparatus for driving a compressor and a refrigerating air conditioner An apparatus for driving a compressor comprises a compressor having a compression mechanism part for sucking a fluid to compress the same, and an electric motor for driving the compression mechanism part, and an inverter device for driving the electric motor at vari... | 10/21/2008 |
| 7372183 | Permanent magnet synchronous motor A synchronous motor includes a stator, a rotor and permanent magnets. The rotor includes a rotor iron core that is rotatable relative to the stator, and conductor bars accommodated within corresponding slots in the rotor iron core. The conductor bars have their oppo... | 05/13/2008 |
| 7365466 | Rotor for an electrical motor The invention provides a rotor for an electrical motor, a tool for making a rotor core and a method of making the rotor. The rotor could be incorporated e.g. in a line-start motor and comprises a squirrel cage and magnet located in a rotor core. The magnets are, in ... | 04/29/2008 |
| 7362027 | Electric machine with a laminated rotor core An electric machine includes a shaft and a rotor core mounted onto the shaft and formed of a plurality of stacked laminations. The rotor core has opposite end surfaces for attachment of a plate in such a manner as to allow an axial deflection of the laminations in t... | 04/22/2008 |
| 7358637 | Method of compressing lamination stacks for permanent magnet rotor The present invention is a method of compressing lamination stacks for a permanent magnet rotor. The method includes the steps of providing a plurality of stages of lamination stacks and magnet carriers on a rotor shaft to form an assembly; positioning a spacer betw... | 04/15/2008 |
| 7348702 | Apparatus and method for flywheel based cooling In accordance with exemplary embodiments, the present invention provides a transient power source that includes a flywheel that stores kinetic energy. In the event of a loss of main or operating power, the kinetic energy stored in the flywheel is converted into elec... | 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 |
| 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 |
| 7337526 | Method for manufacturing squirrel cage rotor Ceramic adhesive is applied inside the slots of an electric machine squirrel cage rotor prior to casting or insertion of rotor conductors. This heat-resistant insulation provides superior electrical insulation that is also mechanically rugged, thus enabling casting ... | 03/04/2008 |
| 7339303 | Electrical machine An electrical machine incorporates a rotor core assembly (30) wherein the core (33) has rotor bars (31) extending into and secured within slots of end rings (34) either side of the core (33). The core (33) is secured in axia... | 03/04/2008 |
| 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 |
| 7330012 | High frequency bus system Certain exemplary embodiments can comprise a system comprising an electric drive system for a machine. The system can comprise a rectifier adapted to convert AC power from an alternator to DC power. The system can comprise an inverter adapted to receive DC power fro... | 02/12/2008 |
| 7312552 | Rotary electro-dynamic machine and armature winding thereof Sub core sections are arranged at the end portions and the center portion of a stator core, and strand conductors are twisted and transposed by 360 degrees continuously toward the extending direction of winding slot. The length corresponding to transposition pitch 1... | 12/25/2007 |
| 7312550 | Architecture for electric machine In one aspect, an alternator is described which includes a current control apparatus including a stator winding and a control winding, wherein current control in the control winding regulates the stator winding. In another aspect, a gas turbine engine includes a mul... | 12/25/2007 |
| 7307366 | Brushless permanent magnet machine with axial modules of rotor magnetization skew and method of producing the same An electrical machine having a machine output rating. The electrical machine including a shaft rotatable about an electrical machine axis, a rotor coupled to the shaft and rotating with the shaft, and a stator including a stator core. The rotor is configurable to in... | 12/11/2007 |
| 7302750 | Method of manufacturing armature of rotary electric machine An armature of a rotary electric machine composed of an armature core, an armature winding and a shaft is manufactured in the following manner. A conductor bar including plural conductors connected in line is formed, and each conductor is cut out from the conductor ... | 12/04/2007 |
| 7301310 | Excitation controlled synchronous permanent magnet machine The present invention provides an apparatus and methods for providing constant voltage from a permanent magnet generator at varying prime mover speeds or under varying loads. A constant voltage permanent magnet generator includes a housing, a magnetized rotor, a pri... | 11/27/2007 |
| 7294949 | Single-phase induction motor A single-phase induction motor comprises a stator having a stator coil; an induction cage rotor rotatably inserted into a receiving groove of the stator, having a rotation shaft at a center thereof, having a plurality of first conductor bars at an outer peripheral p... | 11/13/2007 |
| 7291780 | Transducer for converting between mechanical vibration and electrical signal The present invention provides a transducer for converting between mechanical vibration and electrical signal, the transducer comprising a housing enclosing a substantially cylindrical permanent magnet and a coil, the magnet having a side-to-side polar orientation. ... | 11/06/2007 |
| 7288923 | Voltage-limited electric machine An electric alternator having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits around different portions of the winding which may be configured relative to one another... | 10/30/2007 |
| 7282829 | Rotor for line-start reluctance motor A rotor for a line-start reluctance motor is provided to improve core area efficiency to make flux flow in one direction. The rotor for the line-start reluctance motor includes a core having an axis coupling hole in a coupling direction of a shaft, a plurality of ba... | 10/16/2007 |
| 7271565 | Apparatus for controlling speed of fan motor of air-conditioner An apparatus for controlling a speed of a fan motor (HIM (Hybrid Induction Motor)) of an air-conditioner extends a speed control range of a fan motor of an air-conditioner by controlling revolutions per minute (RPM) of the fan motor. In order to extend the speed con... | 09/18/2007 |
| 7262537 | Electric motor and generator component having a plurality of windings made from a plurality of individually conductive wires An electric motor or generator assembly includes a component, such as a stator, having a plurality of windings. A wire set including a plurality of individually conductive wires twisted together is manipulated within a core to establish the desired number of winding... | 08/28/2007 |
| 7249546 | Die-shaping apparatus and process and product formed thereby A progressive die for shaping a consecutive series of discs from a strip of relatively stiff material, comprising a series of adjacent die stations including a slot cutting station, a plurality of intermediate stations, and a cut off station, the slot cutting statio... | 07/31/2007 |
| 7247965 | Rotor for an electric motor The invention relates to a rotor for an electric motor, especially an electric line-start motor, comprising spaces (4 to 7) which receive permanent magnets (10 to 13) and extend in an axial direction, and spaces (20 to 25) t... | 07/24/2007 |
| 7239061 | Switching pattern AC induction motor Both the stator core and the rotor core of a switching pattern AC induction motor are fabricated by soft magnetic material laminations or ferrite material, etc., both of which have corresponding frequency characteristic. The rotor is a squirrel cage rotor. Switching... | 07/03/2007 |
| 7230363 | Low profile generator configuration One embodiment of the invention relates to a low profile electric generator having a short axial length. A cylindrical rotor body defines an interior cavity and is coupled to a driveshaft along the axis of the cylindrical body. A first rotor assembly is coupled to t... | 06/12/2007 |
| 7227273 | High frequency bus method Certain exemplary embodiments can include a system comprising an electric drive system for a machine. The system can include a rectifier adapted to convert AC power from an alternator to DC power. The system can include an inverter adapted to receive DC power from t... | 06/05/2007 |
| 7215056 | Electrical machine In order to prevent, among other things, fatigue failures in squirrel-cage rotors of electrical machines, the invention provides that the squirrel-cage winding is comprised of flexible conductors. ... | 05/08/2007 |
