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| Number | Title | Issue Date |
| 8110961 | Permanent-magnet-less machine having an enclosed air gap A permanent magnet-less, brushless synchronous system includes a stator that generates a magnetic rotating field when sourced by an alternating current. An uncluttered rotor disposed within the magnetic rotating field is spaced apart from the stator to form an air g... | 02/07/2012 |
| 8053946 | Coreless and brushless direct-current motor, Gifford McMahon (GM) cryogenic cooler, pulse tube cryogenic cooler, cryopump, magnetic resonance imaging (MRI) apparatus, superconducting magnet (SCM) apparatus, nuclear magnetic resonance (NMR) apparatus, and cryogenic cooler for cooling semiconductor A coreless and brushless direct-current motor includes an armature coil wound without core and formed in the shape of a saddle; an outside rotor magnet formed by a permanent magnet, the outside rotor magnet being provided at an outside of the armature coil in the sh... | 11/08/2011 |
| 7990019 | Flat motor having a dual air gap An electric motor is provided which includes a stator, in which field magnets are fixedly and radially installed on a circular panel-shaped base. A coaxial cylindrical rotor is coupled to a shaft and is configured to allow the stator to be located at an inside there... | 08/02/2011 |
| 7960893 | Method of making integrated stator, brushless direct-current motor of radial core type double rotor structure using the integrated stator, and method of making the same Provided are a radial core type brushless direct-current (BLDC) motor and a method of making the same, having an excellent assembly capability of division type stator cores in a double rotor structure BLDC motor. The BLDC motor includes a rotational shaft, an integr... | 06/14/2011 |
| 7944112 | Method of making integrated stator, brushless direct-current motor of radial core type double rotor structure using the integrated stator, and method of making the same Provided are a radial core type brushless direct-current (BLDC) motor and a method of making the same, having an excellent assembly capability of division type stator cores in a double rotor structure BLDC motor. The BLDC motor includes a rotational shaft, an integr... | 05/17/2011 |
| 7911110 | Double rotor type motor The present invention relates to motors, and more particularly, to a double rotor type motor applicable to a washing machine or the like. The double rotor type motor includes an outer rotor having first base, and a first extension extended from a circumference of th... | 03/22/2011 |
| 7888839 | Commercial low cost, high efficiency motor-generator A motor-generator includes a rotor that rotates about an axis of rotation, and a stator that is stationary and magnetically interacts with the rotor. The rotor is constructed of two spaced apart rotor portions having magnetic poles that drive magnetic flux across an... | 02/15/2011 |
| 7839048 | Electrical machine with double-sided stator A machine useful for ship propulsion purposes includes a ship propulsion motor with two concentric air gaps. In one embodiment, the machine includes a rotor with an inner rotor core and an outer rotor core; and a double-sided stator with an inner stator side and an ... | 11/23/2010 |
| 7839049 | Stator and stator tooth modules for electrical machines An electrical machine comprising a rotor and a stator is provided. The stator includes a plurality of stator tooth modules configured for radial magnetic flux flow. The stator tooth modules include at least one end plate, and the end plates have extensions for mount... | 11/23/2010 |
| 7839047 | Axial gap electrical machine An axial gap electrical machine employs unique architecture to (1) overcome critical limits in the air gap at high speeds, while maintaining high torque performance at low speeds, while synergistically providing a geometry that withstands meets critical force concen... | 11/23/2010 |
| 7830064 | Motor and drum washing machine having the same Disclosed are a motor and a drum washing machine having the same. The motor includes external stators and internal stators, which are respectively disposed in a ring shape and are separated from each other in a radial direction, and rotors, which are disposed in a r... | 11/09/2010 |
| 7830063 | Electrical machine with double-sided rotor A machine useful for ship propulsion purposes include a double-sided generator or motor with two concentric air gaps. In one embodiment, the machine includes a double-sided rotor with an inner rotor side and an outer rotor side; and a stator with an inner stator cor... | 11/09/2010 |
| 7812500 | Generator / electric motor A generator and/or electrical motor features elongated electromagnets which extend coaxially, not radially, about the axis of rotation of the axle, thus allowing multiple rings of magnets to be used. A chassis carries the electromagnets with the air gap surfaces of ... | 10/12/2010 |
| 7800276 | Rotor assembly Devices and methods are provided for a rotor assembly and an electric motor. One embodiment for a rotor assembly includes a first rotor including a first interface surface and a second rotor including a second interface surface corresponding to the first interface s... | 09/21/2010 |
| 7791245 | Optimized electric machine for smart actuators An electric machine includes a plurality of magnets for generating a first magnetic field. A magnet holder retains the plurality of magnets. A first stator is disposed radially outward from the magnet holder for generating a second magnetic field. The first stator i... | 09/07/2010 |
| 7768176 | Power storage system with low voltage and high voltage windings for a vehicle driving system The invention relates to a power storage system intended to transmit power to and from a driving system of a vehicle. A power storage having a stator provided with two windings and at least one rotor provided with a magnetic-flux generating device is comprised. The ... | 08/03/2010 |
| 7719160 | Coreless and brushless direct-current motor, Gifford McMahon (GM) cryogenic cooler, pulse tube cryogenic cooler, cryopump, Magnetic Resonance Imaging (MRI) apparatus, Superconducting Magnet (SCM) apparatus, Nuclear Magnetic Resonance (NMR) apparatus, and cryogenic cooler for cooling semiconductor A coreless and brushless direct-current motor includes an armature coil wound without core and formed in the shape of a saddle; an outside rotor magnet formed by a permanent magnet, the outside rotor magnet being provided at an outside of the armature coil in the sh... | 05/18/2010 |
| 7692357 | Electrical machines and assemblies including a yokeless stator with modular lamination stacks An electrical machine includes a rotor with an inner rotor portion and an outer rotor portion, and a double-sided yokeless stator. The yokeless stator includes modular lamination stacks and is configured for radial magnetic flux flow. The double-sided yokeless stato... | 04/06/2010 |
| 7687969 | Method of making integrated stator, brushless direct-current motor of radial core type double rotor structure using the integrated stator, and method of making the same Provided are a radial core type brushless direct-current (BLDC) motor and a method of making the same, having an excellent assembly capability of division type stator cores in a double rotor structure BLDC motor. The BLDC motor includes a rotational shaft, an integr... | 03/30/2010 |
| 7683520 | Electric motor and rotating device that changes relative phase of rotors This electric motor is provided with an inner periphery side rotor, an outer periphery side rotor, and a rotating device that can change a relative phase between these rotors by rotating at least one of them about a rotational axis thereof. The rotating device is pr... | 03/23/2010 |
| 7671509 | Rotor and stator assemblies for permanent magnet electric generator A permanent magnet electric generator includes a rotor assembly and a stator assembly. The rotor assembly has axially disposed annular outer and inner rings concentric with an axis of rotation. A plurality of magnets is disposed on the outer ring, each magnet having... | 03/02/2010 |
| 7652406 | Apparatus for driving drum of washing machine A radial core type double rotor brushless direct-current motor is provided in which a double rotor structure is employed with inner and outer rotors which are doubly disposed and thus a stator core is completely divided. The motor includes a rotational shaft which i... | 01/26/2010 |
| 7592736 | Permanent magnet electric generator with rotor circumferentially encircling stator A permanent magnet electric generator includes a housing, and a stator and a rotor assembly disposed inside the housing. The rotor assembly has annular inner and outer rings concentric with the axis of rotation. A plurality of permanent magnets is distributed on the... | 09/22/2009 |
| 7569970 | Electric motor with multiple rotors in a concentrically circular arrangement around a rotation axis of the electric motor An electric motor comprising an inner periphery side rotor provided with inner peripheral permanent magnets with unlike poles, which are disposed alternately along a circumferential direction of the inner periphery side rotor, an outer periphery side rotor provided ... | 08/04/2009 |
| 7557486 | Dual rotor type motor A dual rotor-type motor includes a stator located between inner and outer rotors. The stator includes a core having first and second surfaces that face magnets on respective circumferential surfaces of the rotors. The surfaces of the core are spaced predetermined di... | 07/07/2009 |
| 7554241 | Three-gapped motor with outer rotor and stationary shaft A motor with three gaps produces higher torque than existing one or two gap motors. The motor uses both one radial and two axial gaps to produce torque. A single stator is provided with an essentially “U” shaped rotor shell having permanent magnets with back iro... | 06/30/2009 |
| 7548008 | Electrical machine with double-sided lamination stack The machine includes a rotor with an inner rotor core and an outer rotor core and a double-sided stator with an inner stator side and an outer stator side. The double-sided stator is concentrically disposed between the inner rotor core and the outer rotor core of th... | 06/16/2009 |
| 7443074 | Apparatus for driving drum of washing machine A radial core type double rotor brushless direct-current motor is provided in which a double rotor structure is employed with inner and outer rotors which are doubly disposed and thus a stator core is completely divided. The motor includes a rotational shaft which i... | 10/28/2008 |
| 7443066 | Methods and apparatus for cooling wind turbine generators A wind turbine generator includes a stator having a core and a plurality of stator windings circumferentially spaced about a generator longitudinal axis. A rotor is rotatable about the generator longitudinal axis, and the rotor includes a plurality of magnetic eleme... | 10/28/2008 |
| 7443642 | Electric motor control A method and apparatus is disclosed for controlling a system comprising at least one electric motor. The system includes aspects which permit, among other things, electromagnetically disconnecting a failed permanent magnet motor from said system, weight savings in m... | 10/28/2008 |
| 7439644 | Hybrid induction motor A hybrid induction motor comprises a stator fixedly installed in a casing, an induction rotor rotatably inserted into a center of the stator and having a shaft at a center thereof, a first synchronous rotor installed between the stator and the induction rotor in a c... | 10/21/2008 |
| 7411330 | Rotating electric machine A rotating electric machine is comprised of a stator having a stator core and a stator coil wound around the stator core, the stator core having at least two tip portions, and a rotor having a rotor core and a plurality of permanent magnets provided in the rotor cor... | 08/12/2008 |
| 7402934 | High performance air core motor-generator winding A motor-generator for converting between electrical and rotational energy includes a rotor mounted for rotation about an axis of rotation relative to a stationary a stator that magnetically interacts with the rotor. The rotor has two spaced apart rotor portions that... | 07/22/2008 |
| 7400077 | Electric motor having multiple armatures An electric motor that includes a housing, a rotatable axle, a first field armature, which is disposed substantially around the axle and secured to the axle, and which includes a plurality of first field magnets spaced around the first field armature, a second field... | 07/15/2008 |
| 7372182 | Axial gap alternator associated with a flywheel An axial gap alternator comprises a first carrier associated with or secured to an output shaft of an internal combustion engine. A first carrier carries a first set of magnets arranged radially about a rotational axis. A second carrier carries a second set of magne... | 05/13/2008 |
| 7372179 | Stepper motor having solenoid coils around end portions of stator poles A stepper motor includes a rotor having a ring-shaped body having a circumference along which a plurality of magnetic poles of alternates. A plurality of stator members is arranged along and spaced from the circumference of the rotor. Each stator member has two limb... | 05/13/2008 |
| 7356906 | Brushless direct-current motor of radial core type having a structure of double rotors and method for making the same A method of manufacturing a radial core type double rotor brushless direct-current motor is provided. A double rotor structure is employed with inner and outer rotors which are doubly disposed such that a stator core is completely divided. A rotational shaft is rota... | 04/15/2008 |
| 7357743 | Hub motor Provided herein is a hub motor, which includes: a motor shaft, which is non-rotational (e.g., fixed), a hub housing, which is connected to the motor shaft via bearings, a stator of the motor with winding, which is fixedly connected to the motor shaft, wherein, the h... | 04/15/2008 |
| 7356922 | Method of fabricating a rate gyroscope and accelerometer multisensor Three magnetic substrates are provided, the first substrate forms the rotor and the other two form the outer stator. A series of spaced concentric grooves and spaced spiral grooves are formed in the central region of both faces of the first substrate. A hole is plac... | 04/15/2008 |
| 7342334 | Insulated stator with wire routing element A stator for an electric machine includes stator teeth with powder coat insulation covering a portion of each tooth. An end cap with a routing element is positioned on one side of the stator. Wire extends around and contacts the powder coat insulation on the stator ... | 03/11/2008 |
