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| Number | Title | Issue Date |
| 7633205 | Electric machine In order to be able to electric drives in very tight installation spaces, e.g. in propulsion vehicles or machine tools, an electric machine (1) is proposed having a stator and a rotor (28), with the laminations (2) of the stator have axial slots... | 12/15/2009 |
| 7626308 | Permanent magnet excited transverse flux motor with outer rotor Disclosed herein is a permanent magnet-excited transverse flux motor with an outer rotor. The permanent magnet-excited transverse flux motor comprises: a stator including a stator powdered iron core formed by an extruded molding through a mold, a pair of stator lami... | 12/01/2009 |
| 7592734 | Three-phase permanent magnet brushless motor A three-phase permanent magnet brushless motor comprises a stator having three-phase windings, and a rotor having a permanent magnet with a plurality of poles for serving as a field magnet. The stator comprises a stator core which includes a powder core that is comp... | 09/22/2009 |
| 7592733 | Rotary electric machine and electric wheelchair mounted with rotary electric machine A rotary electric machine includes a stator including a plurality of teeth which are each wound up by a coil and a stator yoke core connecting the respective teeth, and a rotor provided with magnets disposed so as to oppose to the teeth, respectively, with a space t... | 09/22/2009 |
| 7576468 | Commutation of brushless electrodynamic machines A method, apparatus and system for selectably directing power signals to coils of active field pole members in brushless electrodynamic machinery are disclosed. In one embodiment, a field pole commutator includes a power transfer region configured to transfer at lea... | 08/18/2009 |
| 7538469 | Synchronous machine design and manufacturing Synchronous motors according to the invention operate at higher efficiency, with lower cost, reduced mass and reduced cogging. Magnet dimensions are selected that reduce cogging forces to a negligible amount even though there are fewer slots than normal. Optionally,... | 05/26/2009 |
| 7511398 | Motor and recording disk driving device A base plate is provided with plural through holes extending vertically through the base plate, at the portions aligned with plural teeth. In the respective through holes of the base plate, the lower portions of wire-wound portions of the corresponding teeth and the... | 03/31/2009 |
| 7446449 | Electric motor An electric motor comprising a rotor and a stator is disclosed. The rotor is supported on a substantially spherical bearing and is of a substantially spherical design facing the stator, which has a high degree of efficiency. The stator may have a magnetic return-pat... | 11/04/2008 |
| 7443073 | Electric fan An electric fan includes a frame (10) having a central tube (12) extending therefrom, a bearing (30) received in the central tube, a stator (50) mounted around the central tube, and a rotor (70) being rotatably supported by the bea... | 10/28/2008 |
| 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 |
| 7443069 | Stator structures Stator structures are provided. A stator structure includes at least a magnetic conductive layer and at least a first auxiliary magnetic polar layer. The magnetic conductive layer comprises a plurality of first salient poles. The first auxiliary magnetic polar layer... | 10/28/2008 |
| 7436089 | Reciprocating motor A reciprocating motor comprising an outer stator (110) having a cylindrical shape by radially stacking a plurality of lamination sheets (112) at the outside of a bobbin (160) in which a winding coil is wound; an inner stator (120) dispose... | 10/14/2008 |
| 7436098 | Current limiting means for a generator The invention provides means of limiting maximum current conducted through windings of an electric machine having a rotor and a stator. By encouraging an appropriate leakage flux around a winding, a leak impedance can be achieved which may be used, according to the ... | 10/14/2008 |
| 7432625 | Armature of motor An armature for use in a motor has a plurality of teeth, a plurality of slots and coils of three kinds of phases. A plurality of the slots is formed between the coadjacent teeth. The coils of three phases are wound around the teeth. The armature has a coil structure... | 10/07/2008 |
| 7423358 | Stator structure and manufacturing method thereof A main body of a motor stator. The main body includes a cylindrical waist post, a plurality of first salients and a plurality of second salients. The waist post has a first end and a second end. The first salients, spaced at intervals, are connected to the first end... | 09/09/2008 |
| 7423356 | Thermally-conductive stator support structure A stator assembly including 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 plura... | 09/09/2008 |
| 7418843 | Drum type washing machine A washing machine has a tub that may be made of plastic. A drum is rotatably installed in the tub. A shaft may pass through the tub and connect to the drum for transmission of a driving power from a motor to the drum. The washing machine has a bearing supporting par... | 09/02/2008 |
| 7420309 | Spindle motor In a spindle motor in which teeth portions of a stator core formed by laminating magnetic plates are bent in order to increase the number of turns of the stator windings, a gap in the teeth portions between the magnetic plates is avoided and a precise attractive for... | 09/02/2008 |
| 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 |
| 7411325 | High efficiency combination motor and drive A brushless permanent magnet motor has a rotor constructed of spaced ferromagnetic backirons and a circumferential array of alternating polarity magnetic poles that drive magnetic flux back and forth across an armature air gap between the backirons. A stator include... | 08/12/2008 |
| 7402924 | Cooling assembly for electric machine A cooling assembly including a generally cylindrical body to be inserted inside the generally cylindrical internal stator of an electric machine is described herein. The body includes a cylindrical external contact surface configured and sized to contact the interna... | 07/22/2008 |
| 7397159 | Rotary electric apparatus with skew arrangement A rotary electric apparatus comprises a rotor including a first and second rotor members, a stator including a first stator and second stator members with armature coils to which armature current is supplied for synchronous rotation. The first and second rotor membe... | 07/08/2008 |
| 7395594 | Apparatus and method for the installation of a stator core into a power generator The present invention comprises a method and apparatus for installing a stator core into a power generator 1 that comprises assembling the stator core inside of a container 60, and then moving the container to the power generator. The container is hori... | 07/08/2008 |
| 7394177 | Frameless torque motor with a transport securing device A frameless torque motor with a transport securing device wherein the torque motor includes a ferromagnetic primary element and a secondary element, having magnets oriented in a direction toward the primary element, wherein the primary element and the secondary elem... | 07/01/2008 |
| 7385329 | Electric machine for high magnetic reversal frequencies In electric machines, core losses limit, at high fundamental frequency, the permissible full-load power. The aim of the invention is to develop a design which enables a high power density at high magnetic reversal frequencies and which is easy to produce. To this en... | 06/10/2008 |
| 7382068 | Spindle motor and stator structure thereof A spindle motor includes a stator structure and a rotor structure coupled to the stator structure. The stator structure has a stator base, a magnetic conductive structure surrounding the stator base, and a first buffer structure provided in the gap defined by the st... | 06/03/2008 |
| 7382071 | Rotating electric machine A variable-speed rotating electric machine includes at least two armatures having respective armature coils for multiple phases, and a rotor having permanent magnets. The armatures are arranged concentrically with each other in such a manner that electrical angular ... | 06/03/2008 |
| 7382077 | Electric motor An electric motor comprises a stator (1, 5, 8) having an air-gap which extends around an axis and in which a rotating magnetic field is generated, and a rotor (11, 12, 13) comprising a shaft (11) which is rotatably held by a bearing (10) ... | 06/03/2008 |
| 7380424 | Drum type washing machine Drum type washing machine including a tub of plastic having a wall for holding washing water therein and mounting a driving part thereon, a drum rotatably arranged inside of the tub, a shaft passed through the tub and connected to the drum for transmission of a driv... | 06/03/2008 |
| 7372181 | Rotor for brushless motor and brushless motor A rotor for a brushless motor which can securely prevent an idle running and a scattering of a magnet while restricting a manufacturing cost as low as possible. The rotor is provided with a sintered ring magnet in which not-ground recess portions are formed in an ax... | 05/13/2008 |
| 7372184 | Stator of motor A stator of a motor having various shapes and capable of minimizing the manufacturing costs. At least teeth are manufactured by the iron powder metallurgy method. In order to obtain the overhang effect, the height of a tip of each tooth is lower than the height of a... | 05/13/2008 |
| 7370402 | Method for producing stator packs for long-stator linear motors of magnetic levitation railways A method for producing stator packs for long-stator linear motors of magnetic levitation vehicles is described. At first steel sheets are stacked to form a sheet stack, cross members are inserted into grooves of the sheet stack and the sheet stack and the cross memb... | 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 |
| 7365472 | Electric generator An electric generator 10 of the present invention comprises a permanent magnet 14, a coil 30, a yoke 20, and attracted means 19 composed of a plurality of attracted pieces 18 which are arranged radially around the rotation a... | 04/29/2008 |
| 7364420 | Rotary press for making tablets Rotary press for making tablets with a rotor, which rotor exhibits a die plate and guides for the upper and lower punches, a rotor shaft and an electric drive motor, which electric drive motor rotates the rotor shaft and exhibits a runner and a stator, wherein the r... | 04/29/2008 |
| 7365468 | Motor stator having transposed winding layers An electric motor is provided with a multi-layered winding stator core configuration. A plurality of individual layers of wire strands are successively formed on each stator pole of a pole pair. Each winding layer is fabricated of the same relatively thin wire gauge... | 04/29/2008 |
| 7362013 | Linear motor, exposure apparatus using the same, and device manufacturing method In a movable magnet-type linear motor including a stator having a plurality of iron core elements arranged at a certain slot pitch and a movable part having a magnet 3 which is movable in an arrangement direction one or more pseudo-slots are provided between ... | 04/22/2008 |
| 7358639 | High frequency electric motor or generator A device such as an electric motor, an electric generator, and a regenerative electric motor includes at least one independent energizable electromagnetic assembly. Each independent electromagnetic assembly has an associated one-piece magnetic core. Each independent... | 04/15/2008 |
| 7358629 | Electromagnetic actuator The rotational torque of an electromagnetic actuator having a stator and rotor, such as a stepping motor, is increased. The electromagnetic actuator includes a rotor (30) having multiple magnetic poles (Nr1, Nr2, Nr3, N... | 04/15/2008 |
| 7354254 | Compact vacuum pump A compact turbomolecular vacuum pump (1) is driven by a cup-type motor (8). The cup-shaped rotor of the motor is preferably integrated into the pump rotor (14) and may define corresponding pumping stages, for instance Holweck stages, wherein the... | 04/08/2008 |
