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| Number | Title | Issue Date |
| 8072106 | Stator and rotor-stator structures for electrodynamic machines Embodiments of the invention relate generally to electric motors, alternators, generators and the like, and more particularly, to stator structures and rotor-stator structures for motors that can be configured to, for example, reduce detent. ... | 12/06/2011 |
| 8063530 | Permanent magnet rotor with projections for fixing the permanent magnets of the rotor packet A permanent magnet rotor includes a rotor shaft, a rotor packet that is secured to the rotor shaft and that has a radially inner region and a radially outer region, reception pockets provided in the rotor packet between its radially inner region and its radially out... | 11/22/2011 |
| 7932657 | Rotor for rotating electrical machine A rotor body for an electric motor is comprised of connecting outer peripheral portions of first and second flange members made of electrically conductive material to the opposite ends of a plurality of connection members made of electrically conductive material of ... | 04/26/2011 |
| 7791237 | Fault-tolerant synchronous permanent magnet machine A fault tolerant synchronous permanent magnet machine is disclosed that reduces rotor losses by limiting eddy-current losses in the retaining sleeve. The machine limits eddy-current loss by any one or combination of axially segmenting the retaining sleeve, providing... | 09/07/2010 |
| 7781932 | Permanent magnet assembly and method of manufacturing same A permanent magnet rotor assembly includes a rotor and a plurality of permanent magnet pole assemblies positioned against the rotor. Each of the permanent magnet pole assemblies includes a magnetic block and an encapsulating member that substantially encapsulates th... | 08/24/2010 |
| 7687957 | Magnet fixing structure for electric rotary machine Holder anchoring grooves are arranged on the outer periphery of a rotor core so as to extend axially. A holder arm having a substantially T-shaped cross section is fitted to each of the holder anchoring grooves. The holder arm has a main body section, an engaging pr... | 03/30/2010 |
| 7619341 | Rotor of rotating electric machine A stainless plate is attached to overlie a magnetic steel plate. An upper portion of a through-hole for inserting a magnet is covered with the stainless plate. Thereby, adhesion between the magnetic steel plate and an end plate with an adhesive for fixing a permanen... | 11/17/2009 |
| 7573168 | Method and apparatus for assembling a permanent magnet pole assembly A pole assembly for a rotor, the pole assembly includes a permanent magnet pole including at least one permanent magnet block, a plurality of laminations including a pole cap mechanically coupled to the pole, and a plurality of laminations including a base plate mec... | 08/11/2009 |
| 7535145 | Axial air gap-type electric motor A rotor 31 has permanent magnets 31a disposed on a surface of a disk-shaped back yoke 31b in such a manner that long sides of each permanent magnet extend in a radial direction and that a South pole and a North pole of the permanen... | 05/19/2009 |
| 7498708 | Design of the magnet and webs in interior permanent magnet rotors A rotor includes a rotor core formed of webs defining a layout of the magnets in the rotor core. The rotor core has at least one layer of magnets forming a plurality of poles. Each pole includes a plurality of slots for holding a magnet, at least two ribs comprising... | 03/03/2009 |
| 7466054 | Aerodynamic insert for high speed permanent magnet motor An insert comprising a lightweight structure configured for filling the gaps between axially spaced C-shaped lamination stacks and circumferentially spaced non-magnetic cradles on a permanent magnet rotor. The insert is secured to a rib by a dovetail tongue that fit... | 12/16/2008 |
| 7394174 | Brushless D.C. motor The brushless direct current motor comprises a housing 10, a stator 13 and a rotor 11 within the housing, windings on the stator, sensors for sensing the position of the rotor relative to the stator and electronic circuitry for switching the cur... | 07/01/2008 |
| 7378772 | Rotor for permanent magnet motor A metal film 4 is disposed between a permanent magnet 3 and a rotor yoke 1, and the permanent magnet 3 and the rotor yoke 1 are subjected to beam welding. Since the metal film 4 is disposed between the permanent magnet 3 | 05/27/2008 |
| 7364174 | Magnetic motor axle for skateboards A magnetic motor axle for magnetically augmenting the propulsion efficiency and duration of a skateboard is disclosed. The magnetic motor axle includes a truck for mounting on a step board of a skateboard. Multiple truck magnets are provided in the truck. An elongat... | 04/29/2008 |
| 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 |
| 7355309 | Permanent magnet rotor for a direct drive generator or a low speed motor In order to provide a less expensive generator, a rotor using nonmagnetic beams is disclosed. The rotor includes a magnetic steel rim connected to a main generator shaft by a hub. The magnetic rim supports the components of the rotor, which includes a plurality of m... | 04/08/2008 |
| 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 |
| 7312548 | Torque converter and system using the same A torque converter device comprises a flywheel rotatable about a first axis, the flywheel including a first body portion having a first radius from a circumferential surface and a first radius of curvature, a first plurality of magnets mounted in the first body port... | 12/25/2007 |
| 7304408 | Driving apparatus and light amount adjustment apparatus A driving apparatus includes a magnet that is magnetized to at least two poles in a circumferential direction and fixed to a rotor axis formed with a soft magnetic material, and first and second coils arranged in the same direction as the magnet with respect to the ... | 12/04/2007 |
| 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 |
| 7276805 | Manual-powered generator and assemblies therewith The invention provides a manually-powered electrical assembly. In one aspect, the manually-powered electrical assembly can be a light assembly that comprises a light source, an electrical generator, and a manual actuator assembly. The electrical generator is electri... | 10/02/2007 |
| 7271514 | Rotor structure A rotor includes a rotary shaft, a rib provided on the rotary shaft, and a disc-form holding member. The holding member is joined to an axial end face of the rib. The holding member is thereby coupled with the rotary shaft. The holding member is provided with perman... | 09/18/2007 |
| 7259488 | Rotary electric machine A rotary electric machine comprises a rotating shaft rotatably supported by bearings, a rotor attached integrally with the shaft and a stator facing the rotor. The stator includes a plurality of coils arranged substantially in a circular form in a rotating direction... | 08/21/2007 |
| 7239057 | Single phase induction motor A single phase induction motor comprises: a stator installed at an inner circumferential surface of a motor body, the stator on which a plurality of coils are wound; a rotor rotatably installed at a center portion of the stator and provided with a rotation shaft at ... | 07/03/2007 |
| 7221067 | Armature and method for manufacturing armature An armature for a motor. The armature includes a core formed of compression-molded metal powder. The core has a continuous outer wall, an inner wall defining a slot, and a nonmagnetic section arranged on the outer wall. A coil is arranged in the slot. The coil and t... | 05/22/2007 |
| 7211917 | Motor with a magnet fixed on the inner peripheral face of a circumferential wall A motor includes a circumferential wall part of a case provided with an opening part on one end side in an axial direction and at least a magnet fixed to the inner peripheral face of the circumferential wall part. At least a part of the outer peripheral face of the ... | 05/01/2007 |
| 7178219 | Method of manufacturing a magneto-generator A magneto-generator, a method of manufacturing the same and a resin molding die for manufacturing the same. In the magneto-generator, a guard ring is omitted with the performance of the magneto-generator being enhanced. The magneto-generator is manufactured by makin... | 02/20/2007 |
| 7164216 | Motor A motor includes a stator section with a two-phase structure having first and second stator assemblies disposed in an axial direction, and a plurality of pole teeth arranged at an electrical angle of 90 degrees along inner circumferences of the first and second stat... | 01/16/2007 |
| 7162153 | Apparatus for generating a combined image An apparatus for generating a combined image includes a first reflector, a second reflector, a third reflector, and a camera. In some embodiments, one or more of the reflectors may be movable between a first position and a second position. Additionally, the apparatu... | 01/09/2007 |
| 7148598 | Spoke permanent magnet rotors for electrical machines and methods of manufacturing same A rotor assembly for an electric motor includes a spoke permanent magnet rotor and a shaft connected thereto. The spoke permanent magnet rotor has an axis of rotation, permanent magnet material, and ferro-magnetic material. The permanent magnet material extends outw... | 12/12/2006 |
| 7126313 | Architecture for electric machine The invention includes an electric machine having a rotor, stator and at least one winding in the stator adapted to conduct a current, and a secondary winding, electrically isolated from the first winding and inductively coupled to the first winding, which may be us... | 10/24/2006 |
| 7109614 | Drive unit for determining a rotation position and/or rotation speed of a drive shaft A drive unit includes a housing and a drive shaft, in particular a spindle. The housing has a bearing which rotatably supports the drive shaft which is axially braced with the bearing by means of a clamping element. A measuring indication is arranged on the clamping... | 09/19/2006 |
| 7105974 | AC motor having stator windings formed as loop coils, and control apparatus for the motor A synchronous AC motor has a stator with stator poles arranged as a plurality of circumferentially extending stator pole groups, with each stator pole group having a pair of corresponding circumferentially extending loop-configuration stator windings disposed adjace... | 09/12/2006 |
| 7084540 | Magnet motor and method of assembly A magnet motor with rotor assembly is provided that has a plurality of magnet members that circumscribe a wall of the rotor core or stator in an orientation that minimizes or eliminates gaps therebetween. The magnet members can have non-parallel opposing sides to al... | 08/01/2006 |
| 7084548 | Low cost high speed electrical machine A high speed brushless axial gap air core electrical machine includes a rotor mounted for rotation about an axis, and a stationary stator that magnetically interacts with the rotor. The rotor has two discs that are axially spaced apart to form an armature airgap. A ... | 08/01/2006 |
| 7075203 | Electric motor and method for producing a rotor for such an electric motor The invention relates to a brushless electric motor comprising a stator, which has pole elements, and a rotor, which is mounted rotatably in relation to the stator and comprises magnet poles of magnetic powder material bonded to form a body and a back yoke body carr... | 07/11/2006 |
| 7075204 | Threaded inner sleeve for generator magnet An inner sleeve, having threads on each end, is formed on a motor or generator rotor. A pair of stub shafts are threadably attached to the inner sleeve at each end and a magnet is placed in between. The stub shafts are turned on the inner sleeve to bring them togeth... | 07/11/2006 |
| 7041044 | Rotatable machine or centrifuge with driving motors in a simple casing The rotatable machine (1) of the invention comprises a chamber (2) and a shaft (3), wherein the shaft (3) is mounted in the chamber (2) such that, upon rotation of the shaft (3) and the chamber (2), the shaft (3 | 05/09/2006 |
| 7030530 | Permanent magnet element and electric machine A permanent magnet element intended especially for electrotechnical devices and an electric machine, the element (1) comprising at least one permanent magnet piece (10). The permanent magnet element (1) also comprises a protective cover (11 | 04/18/2006 |
| 7030529 | Electrical machines, especially engines excited by permanent magnets A permanent magnet-excited electric motor with a rotating rotor having permanent magnets disposed with alternating polarities in a ring around its circumference, which magnets cooperate with coils of a stator encompassing the rotor. The permanent magnets, as individ... | 04/18/2006 |
