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| Number | Title | Issue Date |
| 7851962 | Induction motor utilizing dual stators and a double squirrel cage motor A motor apparatus has a housing, an outer stator positioned within the housing, an inner stator positioned within the housing and interior of the outer stator, a rotor positioned in the housing between the outer stator and the inner stator, a first squirrel cage aff... | 12/14/2010 |
| 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 |
| 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 |
| 7112908 | Rotor for synchronous induction motor, synchronous induction motor, fan motor, compressor, air conditioner, and refrigerator There are problems in a rotor having a slit that it is difficult to increase the number of rotations of the rotor, since the centrifugal force is received at both ends of the slit, and if the connection part is made thick to increase the number of rotations, the pro... | 09/26/2006 |
| 7102259 | Rotor of a synchronous induction electric motor A rotor of a synchronous induction electric motor according to the present invention includes a slot for generating induction torque and a slit for generating reluctance torque. The slot and the slit are filled up with aluminum which is short-circuited by an end-rin... | 09/05/2006 |
| 6927526 | Motor A rotor of a motor is attached to a rotor axis slidably both in axial direction and rotational direction, each of elastic bodies is attached to each of side faces of the rotor, and the rotor is fastened to the rotor axis through the elastic body, mechanically by app... | 08/09/2005 |
| 6906448 | Synchronous inductance motor, a manufacturing method of the synchronous inductance motor, and a compressor A synchronous inductance motor provided in a rotor includes at least a pair of slit portions forming a two-pole magnetic polar projection having an easy-to-pass direction of the magnetic flux, i.e., q-axis and a difficult-to-pass direction of the magnetic flux, i.e,... | 06/14/2005 |
| 6897593 | Armature for an actuator An armature for an actuator for applying vibration to a body along an axis, the armature having at least two parallel wound helical windings on the axis, and a terminal arrangement connected to the ends of the windings for selective connection of the windings to two... | 05/24/2005 |
| 6877210 | Electrofriction method of manufacturing squirrel cage rotors A method of making a squirrel cage rotor of copper material for use in AC or DC motors, includes forming a core with longitudinal slots, inserting bars of conductive material in the slots, with ends extending out of opposite ends of the core, and joining the end rin... | 04/12/2005 |
| 6380655 | Variable-speed electromechanical energy converter A variable-speed electromechanical energy converter includes a wound-type induction motor and a power rectifier connected to a secondary winding of the motor to convert AC power produced by the motor into DC power. A chopper is connected to an output of t... | 04/30/2002 |
| 6361291 | Fuel delivery system The invention relates to a fuel delivery unit, having a side channel pump that in a housing (13) has a pump chamber (14) and in the pump chamber (14) has an impeller (16), and having an electric motor (12) that drives the impeller (16) and has a stator an... | 03/26/2002 |
| 6278211 | Brushless doubly-fed induction machines employing dual cage rotors A brushless doubly-fed induction machine comprising dual cage rotors, suitable for use in generator applications requiring a fixed-frequency electrical output that is independent of a rotational speed at which the machine is driven or motor applications r... | 08/21/2001 |
| 6246141 | High torque reduced starting current electric motor An AC squirrel cage motor runs with a rotor current frequency equal to the slip of the motor times its excitation frequency. It is desirable to reduce the rotor current on start up by means of an increased resistance, and then to run the motor with a redu... | 06/12/2001 |
| 5994811 | Electric motor An electric motor comprising two separate and coaxially spaced armatures as well as a magnet-equipped rotor arranged between the two armatures. One armature is fixed to a motor housing being a static armature, while the other armature is free to rotate, h... | 11/30/1999 |
| 5869915 | Electric motor for an X-ray tube An electric motor for an x-ray tube of a medical imaging system is described herein. The electric motor includes a stator and a substantially cylindrical rotor. The stator includes stator winding slots and stator windings injected into the stator winding ... | 02/09/1999 |
| 5818141 | Squirrel cage type electric motor rotor assembly A squirrel cage type electric motor rotor assembly includes first and sec end plates of circular configuration, rigid tubes extending from the first plate to the second plate, the tubes being closed at either end thereof to define enclosed chambers there... | 10/06/1998 |
| 5808391 | Rotor squirrel cage construction An induction motor includes a stator defining stator inner and outer diameters extending about a longitudinal axis, the stator includes a plurality of windings extending longitudinally and circumferentially about the longitudinal axis between the stator i... | 09/15/1998 |
| 5642010 | Rotor construction for alternating current induction motor The present invention pertains to an improved rotor bar design and method of fabrication of asynchronous motors using such rotor bars. The rotor bar design employs "T"-shaped rotor bars that are interleaved around a magnetic core forming a rotor having a ... | 06/24/1997 |
| 5281879 | Synchronous motor with two permanent magnet rotor portions A synchronous motor includes a unitary rotor, a first stator, a second stator and phase-changing switches. The unitary rotor has a first rotor portion formed by a first permanent magnet and a second rotor portion formed by a second permanent magnet and an... | 01/25/1994 |
| 5144180 | Two-stator induction synchronous motor A two-stator induction synchronous motor includes a unitary rotor having a first rotor assembly and a second rotor assembly each of which is formed by a permanent magnet and a rotor core. The first rotor assembly and the second rotor assembly respectively... | 09/01/1992 |
| 5001380 | Rotor for an asynchronous motor with multiple layered screen An asynchronous motor comprising a stator 1, a rotor including a core 2 and a multilayer screen 3. Each layer 4 of the screen 3 is made of an iron-containing alloy of high electrical conductivity, the value of electrical conductivity in each of the succee... | 03/19/1991 |
| 4886991 | Asynchronous motor for spinning elements A spinning or twisting element is provided with an integral asynchronous motor having a laminate stator and a laminate rotor fixed to the shaft of the element. The individual laminates of the stator and rotor are each less than 0.3 mm in thickness and the... | 12/12/1989 |
| 4877984 | Electric motor and pump mounting bracket assembly and method of making An electric motor and pump mounting bracket assembly comprising an electric motor and a bracket fastened to the motor for supporting a pump which is driven by the shaft of the electric motor. The electric motor comprises a cylindrical shell which encircle... | 10/31/1989 |
| 4872256 | Process for producing a squirrel-cage rotor The object of the process is to obtain an intermediate short-circuiting ring in a squirrel cage rotor by filling. It makes use of the technique consisting in automatically cutting out and assembling rotor laminations by means of a follow-on machine in whi... | 10/10/1989 |
| 4716329 | Armature construction for eliminating armature reaction in electric rotating machines To eliminate armature or rotor reaction or leakage flux (leakage reactance) in an electric rotating machine, a short-circuit coil winding is wound on and through the rotor or an armature core of the machine. The short-circuit coil winding is wound at a ri... | 12/29/1987 |
| 4692647 | Rotor construction in an induction motor for eliminating rotor reaction To eliminate rotor reaction in an induction motor, double ring coils are wound on and through the rotor core in addition to the main coils at right angles to the main coil plane. By placement of a nonmagnetic material at the center of the rotor, the flux ... | 09/08/1987 |
| 4488077 | Asynchronous machine with starting disc An asynchronous electric machine, having an iron core mounted on a shaft, squirrel bars and a short circuit ring connecting the bars at both ends of the rotor, and a stator having a coil winding provided with end turns exterior of the stator. A conductive... | 12/11/1984 |
| 4453101 | Amortisseur bar with improved interface between free conductor bars and amortisseur ring An end portion of a free conductor bar of a pole-face winding for the rotor of a large dynamoelectric machine includes a flat at its radially outermost extremity. The end fits loosely within an oversized hole in an amortisseur ring. The presence of the fl... | 06/05/1984 |
| 4381482 | Single-phase, reversible induction motor A single-phase, reversible induction motor, comprising two cylindrical rotors disposed side by side on the same axis of rotation, the rotors being composed of laminated iron cores and provided with grooves of the same number disposed in parallel with the ... | 04/26/1983 |
| 4371802 | Half-pitch capacitor induction motor A balanced, half-pitch capacitor induction motor having a stator core member with equally spaced teeth equal in number to twice the number of motor poles and with the inner ends of the teeth having equal angular extent, and a squirrel cage rotor member. T... | 02/01/1983 |
| 4211946 | Asynchronous electric machine In an asynchronous machine including a rotor of solid iron and a squirrel cage winding, the rotor is further provided with closed slots of any cross sectional shape which receive the bars of the squirrel cage winding whose upper edge is spaced from the ou... | 07/08/1980 |
| 4139790 | Direct axis aiding permanent magnets for a laminated synchronous motor rotor A permanent magnet rotor for a permanent magnet synchronous-run induction-state motor is disclosed. The rotor has Rare Earth magnets disposed in apertures in unitary laminations and parallel to a tangent to the shaft. The magnets are magnetized outwardly ... | 02/13/1979 |
| 3996486 | Synchronous machine with a rated power of at least 1 MVA An asynchronous machine with a rated power of at least 1 MVA has a laminated stator core which supports a multiphase AC winding and a rotor surrounded by the stator core and having a length substantially greater than the length of the laminated stator cor... | 12/07/1976 |
| 3965380 | Sliding armature braking motor An arrangement for increasing the axial displacement force in a sliding armature braking motor in which an intermediate short circuit ring displaced from the end of the stack of rotor laminations is provided along with conventional short circuit rings at ... | 06/22/1976 |
