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| Number | Title | Issue Date |
| 7679255 | Electrical machine An electrical machine is described, having a stationary main element as stator and a rotating main element as rotor, of which one main element having a magnetic yoke and poles, of a predefined number of poles, projecting radially from the former, is made of SMC mate... | 03/16/2010 |
| 7675213 | Reduction of harmonics in an electric motor In the present invention the positions of the slots or poles of the stator of an electric motor are changed in order to reduce the harmonics caused by the stator winding and any vibration caused by these harmonics. In the present invention a shape function is define... | 03/09/2010 |
| 7667366 | Rotor winding shield for a superconducting electric generator A generator rotor core (54) carrying superconducting windings (60) and having a shield (426) over the superconducting windings (60) to prevent external magnetic fields from impinging the windings. Axial shield edges (430/434) mate ... | 02/23/2010 |
| 7667367 | Laminated core and method for manufacturing the same A laminated core formed by reliably and firmly connecting laminated core segments (10) in an annular form by first and second joining sections (19, 20) thereof, the first and second joining sections (19, 20) formed by alternately laminating sets... | 02/23/2010 |
| 7626301 | Electric rotating machine having permanent magnets and method of manufacturing teeth portions of the stator iron core An electric rotating machine having permanent magnets having a rotor having a plurality of permanent magnets, a stator iron core disposed in opposite relation with the rotor, and a stator winding wound around the stator core, wherein the stator core is constituted b... | 12/01/2009 |
| 7626302 | Stator component for an electric motor The present invention relates to a stator component for an electric motor. The stator component for an internal rotor motor comprises a circular stator yoke having an inner periphery, a number of poles, the poles spaced apart from each other along the inner peripher... | 12/01/2009 |
| 7626303 | Stator for inner rotor type mold brushless motor A stator includes split cores arranged in a cylindrical shape. Coils are wound continuously around teeth of split cores forming the same electrical phase via a bridge line. On the outer surface of the split core, openings are formed at the upper end face and the low... | 12/01/2009 |
| 7608968 | Dust core and method of manufacturing the same A stator core includes first and second annular dust core pieces. Each of the first and second annular dust core pieces has a plurality of arcuate dust core pieces each integrally having a yoke extending in an arc shape and a tooth projecting in a radial direction o... | 10/27/2009 |
| 7598649 | Vertical stator double gas D.C. PM motors A vertical stator d.c. PM motor employs outer and inner working air gaps wherein the length of the inner working gap at any stator pole is greater than the corresponding length at the outer working gap. A mutual cancellation of detent torque between the outer and in... | 10/06/2009 |
| 7595577 | Brushless motor and electric power steering apparatus incorporating the same A brushless motor includes an annular stator and a rotor which has a plurality of permanent magnets alternately arranged in circumferential direction on the rotor to form poles and which is disposed within the stator to be rotatable with respect to the stator. The s... | 09/29/2009 |
| 7595578 | Motor, rotary electric machine and its stator, and method for manufacturing the stator A laminated core segment 30 into which a stator core is split has a core main body 31 that extends in an arc shape. On one end section of the core main body 31 there is formed a connecting section 40, and on the other end section there is... | 09/29/2009 |
| 7592732 | 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... | 09/22/2009 |
| 7583002 | Insulation and alignment of segmented stators for electric machines A stator segment for a segmented stator of an electric machine includes insulative material configured for overlapping with insulative material of an adjacent stator segment to provide continuous insulation along a joint between the adjacent stator segments. Additio... | 09/01/2009 |
| 7583003 | Stator for motors The present invention provides a stator for motors in which a space volume occupied by the winding wire of an excitation winding section can be increased, thereby allowing magnetic flux to readily flow through the yoke. On an inner peripheral surface portion of the ... | 09/01/2009 |
| 7583001 | Electric motor design for in hub motors An electric motor design for hub motors comprises a stator assembly, having an axle, a stator plate sector holder, fixed on the axle, at least one stator sector assembly, mounted on the stator plate holder, and electric coils, would around the plates of the stator p... | 09/01/2009 |
| 7579738 | Multi-phase electrical motor for use in a wheel The invention relates to a rotary multi-phase electrical motor wherein stator teeth corresponding to one same phase are grouped on a distinct and magnetically isolated stator section. The number of teeth per stator section is an odd number of a value of at least thr... | 08/25/2009 |
| 7579739 | 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... | 08/25/2009 |
| 7576466 | Electric motor with minimized cogging and related method of determining stator pole geometry An electric motor with reduced cogging torque and related method of determining a stator pole geometry are disclosed. The electric motor includes a rotor (80, 91, 96) and a stator (50A, 50B, 50C, 50D, 60A, 60B, 60 | 08/18/2009 |
| 7567009 | Stator arrangement for an electric machine and a method for manufacturing the stator arrangement A stator arrangement for an electric machine having a stator body which has a back yoke ring and a number of stator teeth that project in a radial direction from the back yoke ring, wherein at least one additional ferromagnetic stator end lamination is mounted on at... | 07/28/2009 |
| 7560844 | Permanent magnet rotary motor A permanent magnet rotary motor is provided in which cogging torque can be reduced and an increase in copper loss can also be prevented. A first divided core unit 13 is combined with a second divided core unit 15, thereby constituting a stator core ... | 07/14/2009 |
| 7560845 | Rotor for a switched reluctance machine A rotor for a switched reluctance machine has its main magnetic circuit provided by two mouldings of soft magnetic composite. The mouldings are substantially identical and fit together to form a magnetic circuit which, by virtue of its design, has a very low inducta... | 07/14/2009 |
| 7550891 | Permanent magnet motor having stator poles with stepped-end-surfaces and rotor with outer-circumferential-recessed surface A permanent-magnet motor including a rotor having permanent magnets disposed therein, and a stator, wherein an outer circumferential surface of the rotor is opposite to an inner circumferential surface of the stator, and one or both of the outer circumferential surf... | 06/23/2009 |
| 7538467 | Magnetic powder metal composite core for electrical machines A compacted magnetic powder metal component assembly for use in an electrical machine is provided. Each component assembly has a top section and a bottom section. Each top section is comprised of a generally cylindrical center portion, a plurality of winding ... | 05/26/2009 |
| 7531936 | Stator core with coil slot skewed relative to stator core axis A stator includes a cylindrical stator core and a coil. The stator core is formed by stacking a plurality of core sheets. The stator core has a groove formed in an outer circumferential surface thereof and a slot. The coil is inserted in the slot. The groove is loca... | 05/12/2009 |
| 7528518 | In-wheel motor A front wheel is rotatably fitted to a knuckle of a suspension by means of a hub unit. While a stator bracket, which is fitted to an outer hub of the hub unit fixed to the knuckle, supports an annular stator, a rotor bracket, which is fitted to an inner hub of the h... | 05/05/2009 |
| 7528519 | Permanent magnet rotary motor The present invention provides a permanent magnet rotary motor in which cogging torque can be reduced without largely reducing the torque. When an angle formed between two virtual lines respectively connecting a center of a rotary shaft and both ends of a first type... | 05/05/2009 |
| 7525231 | Stator used for recording disk driving motor, recording disk driving motor, and recording disk driving device The wire winding height of the first teeth over which the head portion moves is lower than the wire winding height of the second teeth over which is out of the moving range of the head portion. The first wire winding portion is formed so as to be radially longer tha... | 04/28/2009 |
| 7508108 | AC motor A brushless AC motor has a rotor, N stator pole group, and plural loop-configuration stator windings. The rotor has magnetic poles with alternating N poles and S poles circumferentially disposed at equal interval. The stator has plural stator poles divided to N stat... | 03/24/2009 |
| 7501735 | Self-magnetized motor and stator structure thereof A self-magnetized motor includes a stator adapted to rotate by electromagnetic interaction with a rotator, a plurality of slot teeth formed on and surrounding a through-hole of the stator, and an excitation pole adjacent at least one slot tooth having fewer projecti... | 03/10/2009 |
| 7501734 | Motor, compressor, and air conditioner The invention provides a motor comprising a stator and a rotor. The stator core includes a laminated stator core made of laminated stator core plates in which straight cut surfaces are formed on a circular outer peripheral surface of the laminated stator core plates... | 03/10/2009 |
| 7495365 | Stator and resolving method and device thereof The method for resolving the stator having a coil disposed in the slots provided around an inner circumferential face of a cylindrical iron core and having an opening portion includes a step of enlarging the opening portion of the slot, and a step of extracting the ... | 02/24/2009 |
| 7489062 | Synchronous reluctance machine with a novel rotor topology A synchronous reluctance machine that has a stator and a rotor shaft operationally disposed within the confines of the stator. Laminations are axially stacked to form boat shaped segments. A plurality of selected boat shaped segments form a selected number of rotor ... | 02/10/2009 |
| 7479724 | Stator structure A stator structure includes at least one stator part having a single rolled steel sheet to serve as a waist post with a gap. A first stator part includes a first engaging portion. A second stator part includes a second engaging portion corresponding to the first eng... | 01/20/2009 |
| 7474031 | Mike 4001 design of the stator of electrical motor and generator When we use a new structure of stator of a motor (or generator) to let magnetic flux travel less distance in air and keep the flux pattern the same as before then we can improve its efficiency. Motor structure didn't change too much in decades. If we can greatly imp... | 01/06/2009 |
| 7468569 | Stator coil arrangement for an axial airgap electric device including low-loss materials A dynamoelectric, rotating electric machine includes a stator assembly that includes stacked stator coil windings. The machine is preferably a polyphase, axial airgap device. Improved slot filling results from the stacked stator coil configuration. Device performanc... | 12/23/2008 |
| 7468570 | Stator assembly for an electric machine and method of manufacturing the same A stator for a multi-phase electric machine having a plurality of core segments interconnected with one another and a plurality of coils. At least one core segment includes a plurality of teeth and a back portion that at least partially interconnects the teeth. The ... | 12/23/2008 |
| 7466055 | Permanent-magnet synchronous motor In a combination of, for example, a rotor having eight magnetic poles and a stator having twelve slots and pulsating components of permeance, which generate a sinusoidal cogging torque having maxima of the same number as the number of poles of the rotor, pressurizin... | 12/16/2008 |
| 7459826 | Laminated body of motor and manufacturing method thereof A laminated body of a motor includes: a yoke spirally laminated to form a hollow cylindrical shape; a plurality of teeth protruding from one side edge of the yoke disposed along a longitudinal direction of the yoke and being separated apart at a predetermined distan... | 12/02/2008 |
| 7456540 | Motor and recording disk drive device provided with the same In a spindle motor, a core includes a plurality of core plates, which are laminated one on another. The core is constituted by laminating two cores, that is, a first core and a second core, which are different from each other in shape of a surface facing to a rotor ... | 11/25/2008 |
| 7443071 | Motor stator A motor stator includes a stator core (500) and a stator coil. The stator core includes a central cylinder (501) and a plurality of posts (503) extending from the central cylinder. Each post is connected with a magnetic pole (505). The po... | 10/28/2008 |