Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 8154167 | Induction motor lamination design A high efficiency, high torque density, high speed induction motor is provided, the motor utilizing (i) stator teeth with parallel side surfaces; (ii) rotor teeth with parallel side surfaces; (iii) wide open stator slots; (iv) closed rotor slots with thick tooth bri... | 04/10/2012 |
| 8134272 | Dynamoelectric machine The present invention provides a dynamoelectric machine that suppresses the occurrence of insulation failure that accompanies oxidation of a stator core without lowering output, and that also suppresses stator temperature increases by transferring heat that is gener... | 03/13/2012 |
| 8134271 | Adaptive winding system and control method for electric machines An adaptive winding configurations and control method is disclosed for the electromagnetic poles of electric machines, including motors and generators. Motors utilizing the inventive adaptive winding configuration and control method are able to dynamically adjust th... | 03/13/2012 |
| 8134270 | Synchronous motor Provided is a synchronous motor comprising a rotor that includes magnetic poles arranged at equal intervals in the circumferential direction, and a stator that includes stator teeth arranged at intervals in the circumferential direction. Stator teeth other than a re... | 03/13/2012 |
| 8008827 | Triple layer winding pattern and methods of manufacturing same A triple-winding layer arrangement for a three-phase, four pole motor is provided as well as a method of manufacturing the same. ... | 08/30/2011 |
| 7999431 | Saturation control of electric machine The invention includes an electric alternator/motor 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, one of which includes a saturable portion in which saturat... | 08/16/2011 |
| 7977842 | Adaptive winding system and control method for electric machines An adaptive winding configurations and control method is disclosed for the electromagnetic poles of electric machines, including motors and generators. Motors utilizing the inventive adaptive winding configuration and control method are able to dynamically adjust th... | 07/12/2011 |
| 7948139 | Magnetic control circuit separation slit An electric alternator/motor having a stator with at least two non-overlapping sectors is provided. Each sector includes a first winding, first and second magnetic circuits and a saturation control assembly. A cross-talk reduction feature, such as a peripheral slit ... | 05/24/2011 |
| 7948140 | Joint structure of electric wire, stator of rotary electric machine, method for manufacturing the same When electric wires (joint conductors) are disposed adjacent each other in a peeled state of coatings, a gap corresponding to the total thickness of both conductors' insulating films as skin layers is formed between end joined face portions of the conductors. The ga... | 05/24/2011 |
| 7911105 | Stator winding having same radial positions Disclosed is an improved stator for a dynamoelectric machine including a stator core which has a plurality of core slots extending axially from a first end of the stator core to a second end of the stator core. The stator also includes a stator winding having a plur... | 03/22/2011 |
| 7859160 | Electric machine with concentrated windings The electrical machine (1) has a stator (2), which has slots (6) distributed about the periphery, between which a tooth (7, 8) is placed, and in which a winding system (9) with at least one winding phase is placed. Each winding pha... | 12/28/2010 |
| 7825561 | Motor with simplified structure and related control device A brushless motor and a related control device are disclosed in a structure wherein a stator has U-phase, V-phase and W-phase stator poles, with two of the U-phase V-phase and W-phase stator poles carry thereon respective phase windings, in the absence of a selected... | 11/02/2010 |
| 7786643 | Electrical machine, in particular a synchronous motor, with redundant stator windings The electrical machine (1) has a stator (2) and a rotor (5), wherein the stator (2) has stator slots (8), in which a stator winding (4) with redundant and at least three-phase winding systems (U1, V1, W1... | 08/31/2010 |
| 7786642 | Rotating machinery In a rotating machinery having armature windings constituted by a lot of strands, when the armature winding is constituted by four layers, a step number of the strands becomes half with respect to two layers of armature windings so as to facilitate manufacturing an ... | 08/31/2010 |
| 7764001 | Rotating electric machine In a rotating electric machine that is formed of a distribution winding motor with two slots per each pole and each phase, a stator core includes an air gap of a constant width dg1 between the leading end of a same-phase-intermediate tooth and the outer circu... | 07/27/2010 |
| 7732967 | Electrical machine comprising a winding system with coil groups Disclosed is an electric machine (1) comprising a stator (2) that encompasses a winding system (10) with three winding branches, and a certain number of effective pole pairs. Each winding branch is provided with at least one coil group, each of ... | 06/08/2010 |
| 7633204 | Motor stator, spindle motor including the motor stator, and disk drive including the spindle motor A motor stator includes a stator core stack having a core back and a plurality of teeth extending from the core back in a radial direction of the core back. The motor stator also includes winding wires wound around the teeth and having no bonding layer. Only winding... | 12/15/2009 |
| 7615906 | Joint structure of electric wire, stator of rotary electric machine, method for manufacturing the same When electric wires (joint conductors) are disposed adjacent each other in a peeled state of coatings, a gap corresponding to the total thickness of both conductors' insulating films as skin layers is formed between end joined face portions of the conductors. The ga... | 11/10/2009 |
| 7598648 | 2/6 pole single-phase induction motor having shared windings A multi-speed single-phase induction motor including a stator having a main winding selectively adapted for 2n-pole operation and 6n-pole operation, where n is an integer. The main winding includes a plurality of coil sets. The motor is configured to energize at lea... | 10/06/2009 |
| 7557483 | Rotating electrical machine and manufacturing method thereof A stator coil is configured of a first group of six turns of conductive wire, and a second group also of six turns, with the first group of six turns being wound on a spool, leaving a gap the same as the diameter of the conductive wire between winds. Upon completion... | 07/07/2009 |
| 7554238 | Multi-winding motor with reduced impedance unbalance The present invention provides a multi-winding motor. Two three-phase exciting windings Sa, Sb are wound on each of the magnetic pole sections of divided cores 9. Two kinds of discrete winding wirings A, B are wound together with the same winding number onto ... | 06/30/2009 |
| 7545070 | Commutator motor having a number of field winding groups A commutator motor, which has a series excitation or shunt excitation and which, in particular, is suited for use as a drive motor for a washing drum of a laundry treatment device. The stator of a commutator motor of this type has a number of field winding groups wi... | 06/09/2009 |
| 7531935 | Polyphase electricturning machine such as an alternator or an alterno-starter, particular for a motor vehicle A polyphase electric turning machine such as an alternator or an alterno-starter, particularly for a motor vehicle. The machine comprises a stator surrounding a rotor inside a case; the stator comprises a three-phase star-shaped winding and a triangular three-phase ... | 05/12/2009 |
| 7521835 | Permanent magnet machine with windings having strand transposition This document discusses, among other things, a stator with transposition between the windings or coils. The coils are free from transposition to increase the fill factor of the stator slots. The transposition at the end connections between an inner coil and an outer... | 04/21/2009 |
| 7514834 | Permanent magnet type three-phase ac generator A permanent magnet type three-phase ac generator includes a stator having 3n (n is an integer) teeth and a tree-phase armature winding and a rotor having 4n magnetic poles each of which has a permanent magnet. The three-phase winding includes 3n coils each of which ... | 04/07/2009 |
| 7498709 | Method and apparatus for winding segments of a segmented wound member of an electromechanical device In certain embodiments, an electromechanical device is provided with N sets of stator segments, each segment comprising a respective, separate bobbin, the N sets of segments being wound with a single continuous length of wire for each set such that the segments of e... | 03/03/2009 |
| 7430796 | Method for winding the stator of a multiphase electric motor In a method for winding the stator of a multiphase electric motor a plurality of mutually spaced stator teeth are assigned to each phase, wherein all the teeth of the stator are wound without a break in the winding wire, and wherein the winding wire is taken via a c... | 10/07/2008 |
| 7425783 | Linear motor A stator portion of a linear motor includes a U-phase coil portion (10U), a V-phase coil portion (10V), and a W-phase coil portion (10W) through which currents with phases different by 120 degrees from one another flow. Each coil portion has pai... | 09/16/2008 |
| 7417351 | Rotary machine A rotary machine having a stator composed of a stator iron core having a plurality of slots formed in the direction of the rotation axis and stator windings inserted into the plurality of slots, wherein the stator windings are composed of a plurality of conductors r... | 08/26/2008 |
| 7408281 | Stator and brushless motor A technique of facilitating a coil winding work by continuously winding coils in the same direction, in a stator in which a plurality of coils constituting a coil group of the same phase are respectively arranged so as to include positions at which phases of inducti... | 08/05/2008 |
| 7402934 | High performance air core motor-generator winding A motor-generator for converting between electrical and rotational energy includes a rotor mounted for rotation about an axis of rotation relative to a stationary a stator that magnetically interacts with the rotor. The rotor has two spaced apart rotor portions that... | 07/22/2008 |
| 7397156 | Tandem rotary electric machine A tandem rotary electric machine for vehicles is equipped with a primary rotary electric machine and a secondary rotary electric machine arranged in tandem mechanism, namely, of a dual stator-rotor pair mechanism. In the tandem rotary electric machine, a connection ... | 07/08/2008 |
| 7391138 | High-voltage electric rotating machine The present invention relates an electric rotating machine comprising a plurality of phase coils each composed of a plurality of partial coils each made by connecting segments each composed of an inside-slot conductor portion to be accommodated in each of slots of e... | 06/24/2008 |
| 7388312 | Power tool It is an object of the invention to provide an improved technique for controlling the output characteristic of a motor. Representative power tool includes a tool bit and a motor. The motor drives the tool bit and includes an armature, a coordinator, a plurality of s... | 06/17/2008 |
| 7388311 | Redundant windings with current limiting means for electric machines An electric machine comprises a rotor assembly and a stator assembly adjacent the rotor assembly. The stator assembly includes windings disposed around a plurality of teeth, with each phase of the winding including at least one pair of coils wrapped in opposite dire... | 06/17/2008 |
| 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 |
| 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 |
| 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 |
| 7365467 | Low noise stator winding having a phase angle shift A stator for an electric machine includes a generally cylindrically-shaped stator core having a plurality of core teeth that define a plurality of core slots, the core slots extend between first and second ends of the stator core. A stator winding has a plurality of... | 04/29/2008 |
| 7360303 | Method manufacturing for a winding assembly of a rotating electrical machine There are proposed a manufacturing method of a winding assembly of a rotating electrical machine using a rotation block and a fixed block and a manufacturing apparatus used for the same. The rotation block includes a rotation surface rotatable around a rotation axis... | 04/22/2008 |
