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"What, sir, would you make a ship sail against the wind and currents by lighting a bonfire under her deck? I pray you, excuse me, I have not the time to listen to such nonsense."
Napoleon Bonaparte ; When told of the Robert Fulton steamboat
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| Number | Title | Issue Date |
| 7816822 | Motor and control unit thereof A motor includes: a rotor having permanent magnets in which N-poles and S-poles are alternately arranged in the circumferential direction; seven stator pole groups, each of which has a plurality of stator poles arranged in the circumferential direction, the stator p... | 10/19/2010 |
| 7687961 | Stator, motor, and method of manufacturing such stator A stator includes mutually independent annular coils and of two phases and teeth and of three phases. ... | 03/30/2010 |
| 7518280 | Method and system for selectively operating an electric motor A method for selectively operating an electric motor in one of a first pole configuration and a second pole configuration is provided. The first pole configuration has a first phase winding structure, a second phase winding structure and a third phase winding struct... | 04/14/2009 |
| 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 |
| 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 |
| 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 |
| 7291945 | AC motor and control device therefor A rotor, which is rotatable about a rotor shaft, comprises N poles and S poles alternately disposed in the circumferential direction, and rotor-side neutral poles disposed adjacent to the N poles and the S poles along the axial direction of the rotor, being magnetic... | 11/06/2007 |
| 7288868 | Motor generator A motor generator is provided with a stator having a winding around each of a plurality of stator teeth, and a rotor having a plurality of permanent magnets by the number larger than that of the stator teeth, arranged in the circumferential direction at equal interv... | 10/30/2007 |
| 7276832 | Permanent magnet rotary motor There is provided a permanent magnet rotary motor in which manufacture of a stator core is facilitated. The permanent magnet rotary motor includes P rotor magnetic pole sections and N slots. In this permanent magnet rotary motor, a least common multiple LCM (P, N) i... | 10/02/2007 |
| 7246428 | Method for making a coil piece onto a core of rotary electric machine A method for mounting a coil onto a stator for a rotary electric machine. The method includes forming a coil piece by winding wire having a flat cross section into a single row lamination state including wire layers that are aligned along a line that is perpendicula... | 07/24/2007 |
| 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 |
| 7132773 | Brushless direct current motor A direct current motor having a stator that has a plurality of radially arranged stator pole bridges to each of which one phase is allocated, at least one stator pole group being formed by at least two adjoining stator poles which are associated with the same phase,... | 11/07/2006 |
| 7122920 | Motor and optical apparatus Provided are a motor and an optical apparatus each including: a rotatable rotor having a cylindrical magnet; a first coil; a first outer magnetic pole portion which is disposed at a center portion of the first coil and which is opposed to an outer circumferential su... | 10/17/2006 |
| 7114355 | Drum type washing machine having a driving unit Structure of driving unit in a drum type washing machine including a tub mounted inside of a cabinet, a drum mounted inside of the tub, a shaft connected to the drum mounted inside of the tub for transmission of a driving force from a motor to the drum, a front bear... | 10/03/2006 |
| 7105974 | AC motor having stator windings formed as loop coils, and control apparatus for the motor A synchronous AC motor has a stator with stator poles arranged as a plurality of circumferentially extending stator pole groups, with each stator pole group having a pair of corresponding circumferentially extending loop-configuration stator windings disposed adjace... | 09/12/2006 |
| 7076975 | Drive apparatus for a washing machine In a washing machine with a drive apparatus and a suds container on whose rear wall the drive apparatus is disposed, an isolation layer is provided between stator cores of the motor and a stator supporting part or a supporting element to suppress discharge currents ... | 07/18/2006 |
| 7049718 | External-rotor motor having a stationary bearing shaft An improved drum motor, preferably electronically commutated, features a unitary stationary central shaft (18) supporting a stationary inner stator (52), and an external rotor (49), including permanent magnets (50), secured to an inner su... | 05/23/2006 |
| 7040472 | Transfer case with controllable clutch A transfer case (1) with controllable clutch (5) for a motor vehicle, especially for a motor vehicle with part-time four-wheel drive, for distributing a driving torque coming in via a drive shaft (2) to at least two output shafts (3, 4). ... | 05/09/2006 |
| 6984909 | Motor In a permanent magnet-embedded, concentrated winding motor, plurality of stator teeth are divided into, for example, three groups that include a plurality of adjacent stator teeth having coils wound around and that are provided with voltage in phase that are set as ... | 01/10/2006 |
| 6949864 | Rotary electric motor having concentric annular members A rotary electric motor in which rotor and stator members are each configured as annular rings, concentric with respect to each other, about an axis of rotation. Either of the rotor or stator members is formed of groups of electromagnet poles, the groups substantial... | 09/27/2005 |
| 6934468 | Brushless DC motor and circuit for controlling the same Disclosed is a multiphase brushless DC motor of a concentrated winding type having shunt connection, and a control circuit. The brushless DC motor includes a rotor made up of a permanent magnet with M number of poles, and a stator operating in K number of phases by ... | 08/23/2005 |
| 6930423 | Rotation angle detector According to the present invention, when using a pair of annular stators stacked together, they are deviated from each other so that the projected poles may not overlap each other, whereby continuous winding is possible for each winding. Thus, a reduction in cost is... | 08/16/2005 |
| 6909263 | Gas turbine engine starter-generator exciter starting system and method including a capacitance circuit element A rotating electrical machine, such as an aircraft starter-generator, that includes an exciter that has its stator windings supplied with electrical power from a power supply. One or more switches are electrically coupled between the exciter stator winding and the p... | 06/21/2005 |
| 6885162 | High reliability motor system A brushless electric motor system comprises a rotor and a stator comprising poles. Electrical phase windings have coils (U1-6, V1-6, W1-6) wound around the poles. Power switches (T1-24) controlled by a control device supply electric curre... | 04/26/2005 |
| 6879075 | Trapezoidal shaped magnet flux intensifier motor pole arrangement for improved motor torque density A permanent magnet synchronous machine with improved torque and power characteristics. A circumferential-oriented rotor assembly is provided with alternating permanent magnets and magnetic pole pieces. In order to reduce the amount of leakage flux in the rotor and i... | 04/12/2005 |
| 6847147 | Dynamoelectric machine having windings that differ in wire gauge and number of winding turns A multiphase motor comprises a plurality of ferromagnetic stator core segments, the core segments being substantially uniformly spaced around an axis of rotation and isolated from direct contact with each other. Each core segment forms at least one pair of poles hav... | 01/25/2005 |
| 6844656 | Electric multipole motor/generator with axial magnetic flux This invention relates to an electric multiple motor/generator with axial magnetic flux. Thus a generator/motor or electrical machine in which a magnetic flux path through one or more pole legs or pole cores surrounded by current windings or coils is provided. This ... | 01/18/2005 |
| 6844648 | Electric motor stator and motor incorporating same A winding pattern and technique for a stator of an electric motor is provided. The pattern is particularly well-suited for forming a four-pole, three-phase machine. The winding pattern permits concentric windings to be fully installed in slots of a stator core by ma... | 01/18/2005 |
| 6800977 | Field control in permanent magnet machine A multi-pole rotor of an electric machine includes ferromagnetic pole sets each extending from an inner surface of the rotor to an outer surface of the rotor, slots separating each of said ferromagnetic pole segments, each of said slots extending from the inner surf... | 10/05/2004 |
| 6713926 | Thin and lightweight inner rotor motor and disk unit using the same There are provided a rotor having plural magnetic poles disposed in a circumferential shape, and a stator including a stator core having plural magnetic pole teeth that are outside a circumference of the rotor and face the rotor, a coil being wound around each of th... | 03/30/2004 |
| 6657353 | Permanent magnet electric machine with energy saving control The present invention relates to a generator of energy as a dynamo-electric machine with employment of the parallel and superposed forces, of "artificial electromagnetic reaction" between the primary (2) and secondary (3) of "natural ferromagnetic reactio... | 12/02/2003 |
| 6630764 | High performance brushless motor and drive for an electrical vehicle motorization The system includes a permanent magnet three-phase motor and an electronic current controlled inverter by pulse width modulation. The motor has twenty-two poles and twenty-four slots, three phases and a cylindrical outer rotor. This structure minimizes to... | 10/07/2003 |
| 6563247 | AC generator having stator assembly with improved phase coil insertion order to reduce noise An electrical generator has a rotor and a stator core wound with two three-phase delta-connected stator windings. In a 12 rotor pole, 72 tooth/slot stator core, the first, second and third phase coils corresponding to the first stator winding are wound su... | 05/13/2003 |
| 6555977 | Disk drive motor position detection using mutual inductance zero crossing The invention includes a method and apparatus for detecting the position of an electric motor rotor by sensing the zero crossing or polarity change of a mutual inductance associated with the motor. The use of mutual inductance provides for consistent posi... | 04/29/2003 |
| 6462454 | Rotary electric machine A rotary electric machine of the present invention includes a yoke, a multi-polar magnetic field portion composed of 4 poles fixed to the inner wall of the yoke, a shaft disposed within the yoke so as to be able to rotate freely, an armature fixed to the ... | 10/08/2002 |
| 6388356 | Methods and apparatus for controlling electromagnetic flux in dynamoelectric machines A method of adjusting speed and torque of a dynamoelectric machine is disclosed. The machine includes a main winding, and a divided winding each configured to generate a plurality of poles. The method includes the steps of energizing the main winding and ... | 05/14/2002 |
| 6384505 | Stator with a radial winding A stator comprises plural stacked silicon steel plates having aligned axle holes. An auxiliary plate is superimposed on the stacked silicon steel plates and comprises an axle hole aligned with the axle holes of the silicon steel plates. Each silicon steel... | 05/07/2002 |
| 6359349 | Composite type three phase stepping motor A rotor composite type three-phase stepping motor having a stator consisting of two stator elements each having 6n pieces of stator magnetic pole with Ns pieces of pole tooth formed on the tip end of each stator magnetic pole piece, and a permanent magnet... | 03/19/2002 |
| 6351052 | Method of winding armature coil and coreless motor produced through such method The present invention provides a method of winding an armature coil on a cylindrical resin insulator of coreless motors while improving magnetic flux efficiency of the coil. This method allows a resulting motor to effectively generate desired torque by an... | 02/26/2002 |
