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| Number | Title | Issue Date |
| 8138652 | Multistage variable reluctance motor/generator A compact, rugged, variable reluctance, variable speed, electric motor capable of producing high torque at high electrical energy conversion efficiencies is provided. The present invention provides for a multi-stage motor design having a number of discreet rotor and... | 03/20/2012 |
| 8129881 | Ring motor A ring motor (1) as a direct drive, particularly for vertical mills or rod mills, has a stator (6) and a rotor (12) configured as a rotating milling body (10), wherein the stator (6) has at least two different excitation systems, a... | 03/06/2012 |
| 8120224 | Permanent-magnet switched-flux machine A permanent-magnet switched-flux (PMSF) device has an outer rotor mounted to a shaft about a central axis extending axially through the PMSF device. First and second pluralities of permanent-magnets (PMs) are respectively mounted in first and second circles, radiall... | 02/21/2012 |
| 8022586 | Electric machine having rotor and stator configurations According to one embodiment of the present invention, an electric machine comprises a stator and a rotor. The stator has at least one stator pole with a first leg and a second leg. The rotor has at least one rotor pole. The rotor rotates relate to the stator. The at... | 09/20/2011 |
| 8004127 | Rotary reluctance motor A rotary reluctance motor includes a set of inner disks each having an inner diameter root, an outer diameter free end, and a plurality of alternating high permeability teeth and low permeability material segments. A set of outer disks is interleaved with the inner ... | 08/23/2011 |
| 7960887 | Permanent-magnet switched-flux machine A permanent-magnet switched-flux (PMSF) device has an outer rotor mounted to a shaft about a central axis extending axially through the PMSF device. First and second pluralities of permanent-magnets (PMs) are respectively mounted in first and second circles, radiall... | 06/14/2011 |
| 7868504 | Resolver A resolver rotor for a variable reluctance resolver includes a plurality of axially stacked rotor pieces. The rotor pieces are jointly fitted into one body. In the fitting of the rotor pieces, deformed portions are provided between a center of the radial thickness o... | 01/11/2011 |
| 7705505 | Brushless Motor A brushless motor includes at a substantially cylindrical portion of a bracket thereof a retaining mechanism which retains a resolver stator. The resolver stator whose axial movement and circumferential movement are minimized by the retaining mechanism will be affix... | 04/27/2010 |
| 7663283 | Electric machine having a high-torque switched reluctance motor According to one embodiment of the present invention, an electric machine comprises a stator and a rotor. The stator has at least one stator pole with a first leg and a second leg. The rotor has at least one rotor pole. The rotor rotates relate to the stator. The at... | 02/16/2010 |
| 7646126 | Permanent-magnet switched-flux machine A permanent-magnet switched-flux (PMSF) device has a ferromagnetic outer stator mounted to a shaft about a central axis extending axially through the PMSF device. Pluralities of top and bottom stator poles are respectively mounted in first and second circles, radial... | 01/12/2010 |
| 7605512 | Method of designing a reluctance resolver A method of designing a reluctance resolver, and the resolver comprises a stator and a rotor, and an exciting coil and two sets of outputting wires wind around the tooth portion of the stator. The designing method comprises the following steps: fixing relative posit... | 10/20/2009 |
| 7579734 | Apparatus and method that prevent flux reversal in the stator back material of a two-phase SRM (TPSRM) A TPSRM may include a stator, having a plurality of poles and a ferromagnetic or iron back material, and a rotor having a plurality of poles and a ferromagnetic or iron back material. A current flowing through coils wound around a first set of the plurality of stato... | 08/25/2009 |
| 7432704 | Inductor-type resolver An inductor-type resolver capable of reducing a residual voltage by providing a correction winding inside the resolver is provided. Two magnetic pole portions 11 and 15 include winding portions W11 and W12, respectively, which constitute ... | 10/07/2008 |
| 7429840 | Control of an electrical reluctance machine An electrical machine having stator (30) and rotor (31) is disclosed. The motor has field windings (F) and armature windings (A) energized by a suitable power electronic controller (401). A controller (400) sends signals to the power elec... | 09/30/2008 |
| 7425808 | Vehicle drive system and vehicle provided with the same A rotor is provided with slits each of which serves as a flux barrier blocking a magnetic flux. A direction shown by an arrow is a forward direction along which the rotor rotates when a vehicle moves forward. Each of the slits has a width tapering down from a traili... | 09/16/2008 |
| 7385330 | Permanent-magnet switched-flux machine A permanent-magnet switched-flux (PMSF) apparatus comprises a plurality of permanent-magnet switched-flux (PMSF) devices, wherein each of the plurality of PMSF devices comprises a ferromagnetic outer rotor coupled to a shaft, wherein the ferromagnetic outer rotor co... | 06/10/2008 |
| 7372223 | Electric drive control apparatus and method An electric drive apparatus has an electric motor having a rotor and a stator; and a magnetic pole position detecting portion having a sensor rotor attached to the rotor, and a sensor stator that is adjacent to the stator, and that is fixed to a case, and that exten... | 05/13/2008 |
| 7371052 | Embedded fluid mixing device using a homopolar motor A fluid displacement device (100) having a homopolar motor (110). The homopolar motor includes a rotatable disk (115) with at least one fluid displacement structure (120) disposed thereon. The fluid displacement structure can be a blade. ... | 05/13/2008 |
| 7368826 | Electro-hydraulic unit, in particular for anti-lock devices for automotive vehicle wheels An electro-hydraulic unit (10) in particular for an automotive vehicle anti-locking wheel device, includes two separate parts: an electronic control (13) within which is located particularly an electronic card (14 | 05/06/2008 |
| 7362025 | Internal permanent magnet rotor having improved configuration of magnetic flux barriers At each permanent magnet in a rotor of an IPM rotary electric machine, each of a pair of flux barriers respectively disposed adjoining circumferentially opposed side faces of the magnet is formed with a trench portion that extends farther from a circumferential face... | 04/22/2008 |
| 7354046 | Sealing apparatus having sequentially engageable seals Advantageous seal systems are provided that include a barrier member movable relative to a shaft to allow sequential engagement of resilient seal members, e.g., lip seals, with the shaft. Movement of the barrier member may be effected manually or through introductio... | 04/08/2008 |
| 7355312 | Brushless Motor Small brushless motor having high output and small torque ripple. The brushless motor includes induction voltage adjusting means. With this, induction voltage of each phase of the stator is adjusted into a flatly spread waveform having no abrupt variation where odd-... | 04/08/2008 |
| 7348698 | Actuator for operating a transmission control valve of an automatic transmission apparatus A rotor having magnets composed of rare-earth magnets is rotatably disposed inside an exterior casing, a penetrating aperture is disposed through a first end of the exterior casing relative to a direction of a motor central axis, and a filter is disposed so as to co... | 03/25/2008 |
| 7348707 | Electromechanical device having three-dimensional stator laminations In certain embodiments, an electromechanical device includes a rotor having a rotational axis, and a stator disposed about the rotor. The stator may include a circumferentially laminated section comprising a plurality of circumferential segments disposed one after a... | 03/25/2008 |
| 7348753 | Fan motor A fan motor includes: a single-phase stepping motor including a stator excited by applying an electric current to a coil to function as a single-phase magnetic pole, and a rotor which has a permanent magnet magnetized to a single phase and rotates as the magnetic po... | 03/25/2008 |
| 7349402 | Communication system and method to be performed in a communication system The invention relates to a communication method and system wherein a network element of a roaming user is attachable to a visited first network and may still be served by a serving means of the home network. The network element of the roaming user is able to indicat... | 03/25/2008 |
| 7341130 | Protective shield for a disc brake and a disc brake including such a protective shield A protective shield for a disc brake which includes a brake disc attached to a wheelshaft for a vehicle, and a brake yoke with a pair of brake supports. The protective shield is fitted close to one side of, and partly covers laterally, the brake disc. The protective... | 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 |
| 7327061 | AC generator and method One aspect of the invention is a generator with at least two commutators mounted on a rotatable shaft. At least two magnetically conductive bars may be mounted in an opposed relationship with at least one of the bars passing through a wire coil. At least two magnets... | 02/05/2008 |
| 7323867 | Apparatus which detects the thickness of a sheet of paper such as a bank note A thickness detecting apparatus comprises a printed board in a part of which a coil is patterned, a detection roller which is disposed near the coil, which detects thickness of a sheet P of paper as a displacement amount, and a thickness detection circuit mounted on... | 01/29/2008 |
| 7321176 | Multi pole electrical machine with reduced cogging force A multi pole electrical machine includes an armature and a stator. The armature is movable in a direction of armature motion with regard to said stator and includes armature pole pairs. These armature pole pairs follow each other in the direction of armature motion.... | 01/22/2008 |
| 7312549 | Transverse flux machine with stator made of e-shaped laminates In order to improve the torque per weight ratio in electrical machines for a lower price it is proposed to use a segmented stator design. The segmented stator design is based on general E shaped cores traditionally used for single-phased transformers and inductors, ... | 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 |
| 7301333 | Angle position detection apparatus An angle position detection apparatus according to the present invention includes: a unipolar resolver and a multipolar resolver installed so that reluctance is changed in synchronization with the revolution of a direct motor drive; and a select switch is used to sw... | 11/27/2007 |
| 7294981 | Method of determining the position of the shaft of a drive motor for a roller blind The method of determining the position of the shaft of a direct current motor including an armature powered via brushes and a bar commutator and designed to drive a roller blind includes the following phases: detecting and counting... | 11/13/2007 |
| 7288862 | Reciprocating motor A reciprocating motor includes a pair of stators and a cylindrical magnet formed as a single body and disposed between the stators, for linearly reciprocating. Accordingly, it allows facilitating a job of manufacturing and installing the magnet, so that productivity... | 10/30/2007 |
| 7288910 | Sensorless control in a permanent magnet machine An apparatus and method for providing improved sensorless control of permanent magnet motors is described. Induced electricity from at least one winding set is used to determine rotor position and provide feedback to a commutation circuit driving at least another wi... | 10/30/2007 |
| 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 |
| 7279815 | Swing motor A swing motor having an opening formed asymmetrically inside a stator. The swing motor is formed with an asymmetrical opening, in particular in a semicircular shape inside the stator. The opening is provided with a plurality of salient poles wound with coils. Electr... | 10/09/2007 |
| 7276831 | Split-pole field-match motor An electric motor having a plurality of rotor and stator poles, the poles of one element being alternately polarized and neutralized due to the use of direct current and alternating current windings on each pole. The poles of like current are connected in series, an... | 10/02/2007 |
