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| Number | Title | Issue Date |
| 7235910 | Selective etching process for cutting amorphous metal shapes and components made thereof A selective etching process cuts shapes from amorphous metal strip feedstock. The etching process comprises depositing a chemically resistant material to one side of the strip in a pattern that defines the requisite shape, mating the metal strip with a carrier strip... | 06/26/2007 |
| 7233092 | Permanent magnet synchronous motor The present invention provides a permanent-magnet-synchronous-motor having a stator with concentrated windings with the following structure so that permanent magnet (6) is hard to subjected to demagnetization magnetic field: 0.3 Lg | 06/19/2007 |
| 7233090 | Electric machine, in particular brushless synchronous motor An electrical machine, in particular a brushless synchronous motor has a stator (14) and a rotor (12) with salient poles (18) disposed distributed over its circumference, each of which poles has an enclosed permanent magnet (11) and a pol... | 06/19/2007 |
| 7233091 | Electric motor with field assemblies having core pieces with mating features An electric motor has a field assembly, such as a stator, has field coils that are wound to a net shape. Lead wires are brought out from the ends of each field coil. The field coils are insulated. The field coils are assembled with stator core pieces, such as pole p... | 06/19/2007 |
| 7230361 | Efficient high-speed electric device using low-loss materials The invention relates generally to an electric device, such as an electric motor, a generator, or a regenerative motor, having a wound stator core made from advanced low-loss material. In preferred embodiments, the electric device is an axial airgap-type configurati... | 06/12/2007 |
| 7230399 | Vehicular generator-motor system A vehicular generator-motor 1 is composed of a rotor, a stator having three phase armature winding 2, and a converter 4. The rotor is provided with a field winding 3 for magnetizing a plurality of magnetic pole pieces 14a... | 06/12/2007 |
| 7230359 | Electric motor with poles shaped to minimize cogging torque An electric motor has a rotor (36) and a stator (28) having a lamination stack formed with slots (126). The slots have a predetermined slot pitch (τs), and a multi-phase stator winding is arranged in them. The rotor (36) has salient pole... | 06/12/2007 |
| 7227290 | Rotor core and direct-current motor A core includes a ring body and a plurality of teeth. The teeth extend radially outward form the outer circumference of the ring body. The core is formed by assembling a first core member and a second core member. Each core member has part of the teeth the number of... | 06/05/2007 |
| 7227291 | Stator for an electrical machine A stator (50) for an electrical machine. A core of the stator (50) is made up of a series of connected segments (42), that are rotatable relative to one another during an assembly operation. Each segment (42) includes a radially outermost... | 06/05/2007 |
| 7224096 | Rotatable assemblies having chemically bonded lamination stacks A rotor assembly or other rotating device having a stack of laminations or laminates that are chemically bonded together. Chemical bond of the laminates may have a strength that approaches the strength of the material of metal laminates. Chemical bonds may be effect... | 05/29/2007 |
| 7221072 | Method for fabricating helical core A method of fabricating a helical core includes: a stamping step of blanking a pair steel plate cores in two rows from an electrical steel sheet to form a pair of bases confronting each other in a width direction and teeth protruding from each of the bases to altern... | 05/22/2007 |
| 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 |
| 7221068 | Insulated motor core and method for producing same A motor core coated with a multi-layer insulating film. The insulating film preferably includes in order: an electrodeposited coating film applied upon an outer surface of the motor core; a first spray coated insulating film applied upon an outer surface of the elec... | 05/22/2007 |
| 7221069 | Balancing structure for motor rotor A motor includes a fixed portion having a stator with at least two pole faces. Each pole face includes a strong magnetic section and a weak magnetic section for respectively creating stronger and weaker alternating magnetic fields. A rotor includes a shaft rotatably... | 05/22/2007 |
| 7221073 | Axial gap electronic motor An axial gap electronic motor includes a stator and a rotor disposed opposingly with a predetermined gap. In order to provide an easy assembling operation of the stator, the stator includes a plurality of pole members annularly connectable. The annular stator core i... | 05/22/2007 |
| 7218026 | Motor The objective of this invention is to provide a motor which can reduce occurrence of a torque reduction in the overload, and also lower the temperature of a motor main body immediately even in the case of a temperature rise in the motor main body. This motor ... | 05/15/2007 |
| 7213324 | Method and manufacturing stator coil structure for revolving field electrical machine A number of embodiments of rotating electrical machines and methods for winding them that provides a high space utilization and very effective winding with less likelihood of damage to the insulation of the wire of the winding during the winding process. The arrange... | 05/08/2007 |
| 7211920 | Field assemblies having pole pieces with axial lengths less than an axial length of a back iron portion and methods of making same An electric motor, power tool using the electric motor, and method of making the electric motor includes making a stator that includes pole portions that have axial lengths less than an axial length of a back iron portion. Alternatively, or in addition, the pole por... | 05/01/2007 |
| 7210218 | Method for fabricating electrical core sheet assemblies A method of fabricating electrical core sheet assemblies such as transformer limbs, transformer yokes, and transformer cores, includes the steps of first cutting electrical core sheets, whose main surfaces have been provided with an anti-corrosion layer, into a desi... | 05/01/2007 |
| 7211910 | Step motor A step motor includes a rotor having four magnetic poles, a first magnetic pole magnetically excited by a first coil, a second magnetic pole magnetically excited by a second coil, and a third magnetic pole magnetically excited by the first coil and the second coil. ... | 05/01/2007 |
| 7211919 | Thermally-conductive stator support structure A stator assembly includes a plurality of stator coil assemblies and a stator coil support structure constructed of a non-magnetic, thermally-conductive material. The stator coil support structure includes an axial passage for receiving a rotor assembly and a plural... | 05/01/2007 |
| 7211918 | Motor and armature manufacturing method An insulator covering the teeth (31) of an armature (3) in an inner-rotor motor is composed of a tooth insulator (321), outer-side insulator (322), upper-end insulator (323), and lower-end insulator (324). The tooth insulato... | 05/01/2007 |
| 7204011 | Method for manufacturing adaptive machines A method for assembling machines using multiple, structurally equivalent components. The characteristics of each component are tested. The tested components are sorted into component classes using the test information. Individual components are selected from the cla... | 04/17/2007 |
| 7205694 | Control of a switched reluctance drive A switched reluctance machine has a stator which has an array of alternate wide and narrow poles around its inner circumference. Coils are wound around the wide poles only. The rotor includes segments of soft magnetic material carried on a non-magnetic core. The seg... | 04/17/2007 |
| 7204012 | Method for fabricating a rotor arrangement and a rotor arrangement for an electric machine A method for fabricating a rotor arrangement for an electric machine in which a rotor body is provided and permanent magnets made from an isotropic magnetic material are embedded in the rotor body, the permanent magnets being magnetized by an external magnetizing de... | 04/17/2007 |
| 7205696 | Field assemblies having pole pieces with ends that decrease in width, and methods of making same An electric motor, power tool using the electric motor, and method of making the electric motor includes making a stator that includes pole portions that have axially opposed ends that gradually decrease in width. The pole portions may also have dovetail features th... | 04/17/2007 |
| 7201244 | Vehicle for materials handling and other industrial uses A heavy duty wheeled vehicle for an industrial environment is electrically driven by one or more switched reluctance motor traction drive system connected to the wheels. The switched reluctance motors are powered by an electrical generator that is driven by an engin... | 04/10/2007 |
| 7202585 | Brushless motor A brushless motor is capable of increasing output torque while suppressing an increase in iron loss. A plurality of magnets are magnetized in reverse radial orientation in such a manner that magnetic fields directed toward a stator converge toward the stator, and ea... | 04/10/2007 |
| 7199492 | Armature of linear motor An armature of a linear motor includes a plurality of first magnetic teeth and a plurality of second magnetic teeth, each of the magnetic teeth being formed by laminating multiple tooth elements made of electromagnetic steel sheets. The first magnetic teeth are arra... | 04/03/2007 |
| 7199497 | Frameless switched reluctance motor and application as a top drive for a rotary pump A frameless switched reluctance motor (SRM) has a stator sandwiched between two housings. Axial load on the rotor shaft is directed through a first bearing, through the first housing to the stator and through the second housing to a motor support. Heat is dissipated... | 04/03/2007 |
| 7199500 | Claw-pole electric generator and bicycle electric generator hub A claw-pole electric generator has a circumferentially arranged permanent magnet, a ring-shaped coil, a yoke and a cover member. The yoke surrounds an external periphery of the coil. The yoke has a stator yoke portion and a core yoke portion. The stator yoke portion... | 04/03/2007 |
| 7195717 | Ferrite core for RFID application, method of manufacturing the same, and ferrite coil using the same A ferrite core comprising a sintered oxide containing at least 48.6 to 53.9 mol % of Fe on Fe2O3 basis, 12.3 to 35.2 mol % of Ni on NiO basis and 16.4 to 37.0 mol % of Zn on ZnO basis as metal elements, and contains a crystal phase comprising t... | 03/27/2007 |
| 7196445 | Permanent-magnet rotating machine A permanent-magnet rotating machine includes a rotor having a rotor core carrying on a curved outer surface multiple permanent magnets arranged in two rows along an axial direction. The permanent magnets in one row are skewed from those in the other row in a circumf... | 03/27/2007 |
| 7196446 | Rotor for an electric motor The invention relates to a rotor for an electric motor comprising an essentially cylindrical rotor core having a central aperture, and comprising permanent magnets which are embedded in the rotor core and extend essentially like spokes through the rotor core, the ra... | 03/27/2007 |
| 7196448 | Stator structure A stator structure. A first stator part includes a first engaging portion. A second stator part includes a second engaging portion corresponding to the first engaging portion. The first and second stator parts are of the same material. When the first stator part is ... | 03/27/2007 |
| 7190101 | 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... | 03/13/2007 |
| 7188403 | Manufacturing method of armature comprising core constituted by assembling split core members The armature of a motor comprises a core constituted by assembling a plurality of split core members. Each split core member has at least two teeth. The method for manufacturing the armature comprises the steps of: winding a conductive wire on each tooth of each spl... | 03/13/2007 |
| 7185418 | Stacked stator core and method of manufacturing thereof, and rotary motor and method of manufacturing thereof The present invention relates to a structure of a stacked stator core formed when rotary motors are manufactured and to a method of manufacturing the stacked stator core. It is possible to improve the workability in the winding process and the productivity of the st... | 03/06/2007 |
| 7187092 | Thin inner rotor motor for rotatably driving medium, and disk apparatus using the same An inner rotor motor includes a rotor having a plurality of magnetic poles circumferentially arranged, and a stator with a stator core having a plurality of magnetic pole teeth that are positioned on the outer side of the circumference of the rotor and oppose the ro... | 03/06/2007 |
| 7183688 | Stator for an electric motor A stator for an electric motor having a stator core which has a number of stator teeth and stator slots located between the stator teeth, the stator slots being designed to receive stator windings, the stator slots being given different depths in order to accommodat... | 02/27/2007 |
