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"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 7973445 | Laminated rotary actuator with three-dimensional flux path A rotary actuator includes a stator assembly positioned within an outer enclosure. A rotor assembly is positioned adjacent to the stator and is configured to rotate relative thereto and about a centerline axis of the rotary actuator. Each of the outer enclosure, the... | 07/05/2011 |
| 7851960 | Synchronous reluctance motor A synchronous reluctance motor is described. The synchronous reluctance motor includes a core configured to rotate about a central axis and having first and second groups of flux barriers formed therein. Each flux barrier is defined as an opening in the core. Each o... | 12/14/2010 |
| 7750524 | Superconductor magnetizing device and superconducting synchronization device A magnetizing device for superconductor and a superconducting synchronous machine are provided capable of constituting more compact and simple equipment that uses a superconductor as a magnet. The magnetizing device for superconductor includes a superconductor (1... | 07/06/2010 |
| 7576465 | Dual rotor electromagnetic machine The invention relates to an electric synchronous machine. There is a need for a dual rotor electric synchronous machine which has a mechanism for adjusting the rotor relative angular displacement while the machine is running in order to reduce back emf. There is a n... | 08/18/2009 |
| 7569962 | Multi-phase brushless motor with reduced number of stator poles An A-phase brushless motor, where A is an integer greater than or equal to 2, includes a stator and a rotor. The stator has q stator poles, where q is an integer greater than or equal to A. The stator poles form S stator pole sets each consisting of A stator poles e... | 08/04/2009 |
| 7535149 | Permanent-magnet excited synchronous motor To reduce the torque ripple of permanent-magnet excited synchronous motors (1) having tooth coils (6), constructive means are proposed for damping or eliminating the fifth and/or seventh harmonic wave of the rotor field which mainly cause torque ripple... | 05/19/2009 |
| 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 |
| 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 |
| 7362027 | Electric machine with a laminated rotor core An electric machine includes a shaft and a rotor core mounted onto the shaft and formed of a plurality of stacked laminations. The rotor core has opposite end surfaces for attachment of a plate in such a manner as to allow an axial deflection of the laminations in t... | 04/22/2008 |
| 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 |
| 7342330 | Hybrid type double three-phase electric rotating machine A stator core having twelve stator poles, coils wound around the stator poles, and a hybrid type rotor are included. The stator poles inwardly and radially extended from an annular yoke portion. Each of the respective stator poles has the same number of inductors. T... | 03/11/2008 |
| 7342338 | Permanent magnet electric motor with reduced cogging torque A permanent magnet electric motor 10 comprises a rotor 30 provided with two stages of permanent magnets in the axial direction on an outer circumferential face of a rotor iron core, and having a shaft shifted by a stage skew angle θr in electrical ang... | 03/11/2008 |
| 7342339 | Reluctance machine having a non-uniform air gap A reluctance machine includes a stator having a stator core. The stator core includes a central bore and a plurality of stator poles extending inwardly from the stator core. Each of the stator poles includes a stator pole face. The reluctance machine further include... | 03/11/2008 |
| 7342337 | Power generating systems A power generating system includes a torque converter system receiving a rotational motion having a first torque from a source and producing a rotational output having a second torque different from the first torque, a transfer system having a first portion coupled ... | 03/11/2008 |
| 7336011 | Power generating systems A power generating system includes a torque converter system receiving a rotational motion having a first torque from a source and producing a rotational output having a second torque different from the first torque, a transfer system having a first portion coupled ... | 02/26/2008 |
| 7336045 | Speed regulator for a brushless dc motor Speed regulator for a brushless DC motor, wherein the DC motor comprises a stator, a rotor and an electromagnet wherein the electromagnet is in the vicinity of the stator, the rotor produces a permanent magnetic field and the electromagnet is activated to generate a... | 02/26/2008 |
| 7317273 | Electromagnetic actuator and portable device having the same An electromagnetic actuator includes a cylindrical stator made of a permanent magnet and having annular end faces magnetized to plural magnetic poles, a coil securely disposed in a hollow portion of the stator via a bobbin on which the coil is wound and which is fix... | 01/08/2008 |
| 7315102 | Axial gap motor An axial gap motor is described which comprises a rotor shaft rotatable about its axis in case. A rotor is fixed to the rotor shaft to rotate therewith. The rotor includes a plurality of magnets. A stator is disposed about the rotor shaft at a position to coaxially ... | 01/01/2008 |
| 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 |
| 7301310 | Excitation controlled synchronous permanent magnet machine The present invention provides an apparatus and methods for providing constant voltage from a permanent magnet generator at varying prime mover speeds or under varying loads. A constant voltage permanent magnet generator includes a housing, a magnetized rotor, a pri... | 11/27/2007 |
| 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 |
| 7282829 | Rotor for line-start reluctance motor A rotor for a line-start reluctance motor is provided to improve core area efficiency to make flux flow in one direction. The rotor for the line-start reluctance motor includes a core having an axis coupling hole in a coupling direction of a shaft, a plurality of ba... | 10/16/2007 |
| 7279818 | Power generating systems A power generating system includes a torque converter system receiving a rotational motion having a first torque from a source and producing a rotational output having a second torque different from the first torque, a transfer system having a first portion coupled ... | 10/09/2007 |
| 7268454 | Power generating systems A power generating system includes a torque converter system receiving a rotational motion having a first torque from a source and producing a rotational output having a second torque different from the first torque, a transfer system having a first portion coupled ... | 09/11/2007 |
| 7261524 | Rotation support with improved thrust-bearing for rotors of pump electric motors A rotation support has improved thrust-bearing for rotors of electric motors of synchronous pumps. The rotation sup: a stator of the electric motor, in which a hollow body is housed for supporting and containing a permanent magnet rotor, an impeller being kinematica... | 08/28/2007 |
| 7259490 | Synchronous machine The present invention concerns a synchronous machine with preferably salient poles with pole windings which are galvanically connected together. The invention further concerns a wind power installation and a method of monitoring a synchronous machine of a wind power... | 08/21/2007 |
| 7247965 | Rotor for an electric motor The invention relates to a rotor for an electric motor, especially an electric line-start motor, comprising spaces (4 to 7) which receive permanent magnets (10 to 13) and extend in an axial direction, and spaces (20 to 25) t... | 07/24/2007 |
| 7247964 | Electrical machine with magnetized rotor An electrical machine comprises a stator and a rotor. The rotor is adapted to magnetically interact with the stator to promote rotation of the rotor about an axis. The rotor includes a rotor core and a plurality of magnetized arcs supported by the rotor core. The pl... | 07/24/2007 |
| 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 |
| 7230360 | Switched reluctance machine A switched reluctance machine (SRM) having a rotor and stator pole numerical relationship of S number of stator poles and R number of rotor poles, where R=2S−2, when S is greater than 4; provides improved power density, torque production, torque ripple, and acoust... | 06/12/2007 |
| 7230363 | Low profile generator configuration One embodiment of the invention relates to a low profile electric generator having a short axial length. A cylindrical rotor body defines an interior cavity and is coupled to a driveshaft along the axis of the cylindrical body. A first rotor assembly is coupled to t... | 06/12/2007 |
| 7221071 | Synchronous electrical machine The electric machine (M) comprises an armature (A) and an inductor (B), the inductor (B) having for each pair of poles (N, S) of the armature (A), n teeth (20) identical to one another and n slots (21) and being provided with a winding (W) housed in th... | 05/22/2007 |
| 7202580 | Permanent magnet type motor and x-ray computed tomography apparatus A permanent magnet type motor comprising a rotor main body rotatably supported with respect to a stationary member, a rotor which is provided on an outer periphery face of the rotor main body and which is arranged such that S poles and N poles of a plurality of perm... | 04/10/2007 |
| 7202619 | Variable frequency drive for AC synchronous motors with application to pumps Two apparatuses are disclosed for controlling the speed of an AC synchronous motor-pump utilizing a series of stepped voltage pulses at the driving frequency. The first apparatus is an isolated variable frequency drive comprising step-down transformer 100, fu... | 04/10/2007 |
| 7202625 | Multi-motor switched reluctance traction system A switched reluctance traction system is provided for work machines. The switched reluctance traction system may include a plurality of switched reluctance motors. Each switched reluctance motor may include a stator with a plurality of stator poles and a rotor with ... | 04/10/2007 |
| 7197944 | Hub unit with sensor A sensor device including a resolver having a rotor provided on a rotation-side raceway member of a hub unit and a stator provided on a stationary-side raceway member of the unit, and a processing circuit for processing a signal to be output in accordance with an ai... | 04/03/2007 |
| 7196447 | Rotating electric machine A rotating electric machine comprises a stator having stator salient poles, three-phases windings wound around the stator salient poles, a rotor rotatable held inside the stator, and permanent magnets inserted into the rotor and positioned opposite to the stator sal... | 03/27/2007 |
| 7195211 | Electronically controlled grade crossing gate system and method An electronically controlled grade crossing gate system and method. The system includes a gate arm, a gate arm moving assembly, a position sensor assembly and a controller. The gate arm moving assembly is configured to move the gate arm and the position sensor assem... | 03/27/2007 |
| 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 |
| 7170212 | Synchronous axial field electrical machine A permanent magnet electrical machine comprises a first substantially planar member (9, 10) and a second substantially planar member (3) arranged substantially parallel to the first substantially planar member. The first and second members are rotatabl... | 01/30/2007 |
