| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 310159000 | A.C. | 33 |
| 20080290754 | AC Motor - The motor includes a rotor including N-pole magnets and S-pole magnets located alternately along a circumferential direction of said AC motor, a stator core including a plurality of partial cores arranged coaxially along an axial direction of said AC motor each of said partial cores including a plurality of stator poles located along said circumferential direction so as to be on the same circumference, and a plurality of loop-like windings each of which extends in said circumferential direction while passing through, in said axial direction, interpole spaces between each two adjacent stator poles in said circumferential direction. The a phase angle difference between each adjacent two of said stator poles in said circumferential direction of the same one of said partial cores is set at a value smaller than 360 degrees for each of said partial cores. | 11-27-2008 |
| 20080315702 | Alternator For Vehicle and Rotating Electrical Machine - An alternator for vehicle includes a stator that outputs an AC voltage and a rotor that includes a field coil and a rotor core. The stator includes a plurality of phase stators that are disposed side-by-side along the rotational axis and individually output AC voltages. The phase stators include an even number of stator tabs alternately extending from one outer side of a phase stator coil toward another outer side of the phase stator coil and extending from the other outer side toward the one outer side along the rotational axis. The rotor includes a field coil and a rotor core at which an even number of rotor tabs are formed along the circumferential direction so as to alternately extend from one outer side of the field coil toward another outer side of the field coil along the rotational axis and extend from the other outer side toward the one outer side along the rotational axis. A phase stator core at each phase stator is formed by laminating a plurality of magnetic sheets. | 12-25-2008 |
| 20120025657 | VEHICLE AC GENERATOR - In order to provide a vehicle AC generator capable of easily setting an attachment direction of a battery terminal and reducing the total shaft length of the generator, in the vehicle AC generator including a case composed of a front bracket and a rear bracket, and a rotor and a stator which are arranged in the case, the vehicle AC generator includes a battery terminal arranged on an outer circumferential portion of the rear bracket, an engaging body provided on the battery terminal, and a plurality of fitting portions to which the engaging body is fitted. | 02-02-2012 |
| 20120112594 | STATOR CORE - A stator core includes a cylindrical yoke and teeth that are disposed in an inner circumference surface of the yoke along its circumferential direction and that are subjected to magnetic flux from the rotor of the rotating electrical device. The teeth include a trapezoidal tooth that has a trapezoidal cross section that is taken vertically along a central axis of the yoke and an oddly shaped tooth of which a tip section has the same shape as the trapezoidal tooth and a base section from the tip section to the yoke has a different shape from the trapezoidal tooth. | 05-10-2012 |
| 20130076187 | 5-PHASE ALTERNATING CURRENT INDUCTION MOTOR AND INVERTER SYSTEM - An induction motor having five phases is disclosed. Adding two or more phases to existing 1, 2, and 3 phase designs can boost power, torque, and speed. This document describes a method of controlling a motor and an inverter through load, power, torque, or speed demands. Cooling applications for the system and various electronic filtering methods are also disclosed. | 03-28-2013 |
| 20140015365 | Electromagnetic High Frequency Homopolar Generator - Electromagnetic high frequency homopolar generator is a type of homopolar generator that can continuously transform kinetic energy into high frequency current. Operating frequency of this generator is independent from speed of rotation. Due to high frequency, power from this generator can be easily distributed by transformers. It is known that the higher frequency of the current is, the smaller core for the transformer is required. Generator, described herein, is operating on its resonant frequency, increasing voltage in the armature circuit. Where a large power source of a high frequency is needed, my generator can replace devices, which use semiconductors to convert current from direct to high frequency. | 01-16-2014 |
| 310162000 | Synchronous | 11 |
| 20080296991 | 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 of the first and second groups includes a first flux barrier and a second flux barrier with the second flux barrier disposed outside the first flux barrier in a radial direction from the central axis of the core. Each of the second flux barriers of the first and second groups has at least two connection parts crossing the opening of the second flux barrier. | 12-04-2008 |
| 20090134734 | Ac motor and control unit thereof - The motor, which is an incorporated N-phased motor, comprises a rotor having four or more poles with N-poles and S-poles being alternately arranged in the circumferential direction, a stator having a stator core in which magnetic circuits are magnetically separated within an electrical angle of 360°, and an (N−1) number (N is a positive integer) of windings. The motor is configured so that currents of the windings can effectively work on the magnetic circuits. | 05-28-2009 |
| 20090236925 | Self Magnetizing Motor - A self magnetizing motor, in which a magnetic substance is disposed at the rotor and a stator is provided with a magnetizing portion to magnetize the magnetic substance, and the magnetizing portion forms an exciter pole protruding toward the magnetic substance and a tip portion tapered at an end of the exciter pole, wherein a width of the exciter pole, a protruding length of the tip portion, and a width of the tip portion are formed in the ratio of 8-9:2-2.5:1-2.4, thereby increasing the intensity of magnetizing of the magnetic substance thus to improve the motor performance. | 09-24-2009 |
| 20100156230 | ALTERNATOR FOR MOTOR VEHICLES - An alternator for motor vehicles, having a rotor, whose poles are developed as claw-poles. In order to improve the design options of the stator of the machine, its multiphase winding is developed as a fractional-slot winding, whereby, in particular with respect to the selection of the number of slots, many additional options are created, by which both the production is made clearly simpler and less costly and, at the same time, the electrical properties are able to be improved. | 06-24-2010 |
| 20110084566 | SUPERCONDUCTIVE ROTOR, SUPERCONDUCTIVE ROTATING MACHINE AND SUPERCONDUCTIVE ROTATING-MACHINE SYSTEM - The main problem to be solved by the invention is to provide a superconductive rotor, a superconductive rotating machine and a superconductive rotating-machine system which are capable of inductive and synchronous rotation while employing the induction machine configuration and also offer satisfactory heat dissipation performance, stability under an excessive load, and easy magnetic flux trap for synchronous rotation. To solve the problem, the invention provides a superconductive rotor, as shown in FIG. | 04-14-2011 |
| 20120146446 | SINE-WAVE CURRENT LINE-START THREE-PHASE RARE-EARTH PERMANENT MAGNET SYNCHRONOUS MOTOR - A sine-wave current line-start three-phase rare-earth permanent magnet synchronous motor includes a motor shaft, a rotor and a stator. The rotor is disposed inside the stator and rotates around the motor shaft. The rotor includes P pairs of poles. Each pole includes a polar arched surface. A planar surface is formed between adjacent polar arched surfaces. Thus, a non-uniform air gap is formed between the pole face of the rotor and the inner circumferential surface of the stator. By the use of a salient-pole structure with the non-uniform air gap, the asymmetry of the magnetic circuit caused by permanent magnets can be offset, thereby making the manufacturing process of the rotor simplified, the negative sequence components of the rotor current during the line starting process reduced significantly, the starting performance improved, the sine-wave current provided during the operating process, the harmonic loss reduced, and the motor efficiency enhanced. | 06-14-2012 |
| 20140252905 | FLUX-SWITCHING ELECTRICAL MACHINE - A singly-excited flux-switching electrical machine, that includes field coils and phase windings, is provided. The field coils and the phase windings are accommodated respectively in the unevenly shaped notches of a stator, such that the field coils and phase windings are radially offset. | 09-11-2014 |
| 20170237307 | Rotor, Reluctance Machine and Method for Manufacturing the Rotor | 08-17-2017 |
| 310165000 | D.C. excited | 3 |
| 20100038986 | Brushless Motor/Generator With Trapped-Flux Superconductors - Apparatus and methods provide for a high specific power electro-dynamo device that utilizes high-temperature superconductors, a dysprosium core, and superconducting coils to provide power. According to various embodiments, a rotor includes a number of rotor arms with a high-temperature superconductor attached to each arm. A stator includes a number of stator arms with stator coils wrapped around each arm. The stator coils may include superconducting wires for providing a charge to the high-temperature superconductors and non-superconducting wires for inducing a voltage from the trapped flux provided by the superconductors during operation in generator mode. The dysprosium core maximizes the magnetic flux saturated by the core while providing additional safety measures during operation. A backup power wheel or permanent magnets positioned in series with the high-temperature superconductors may provide emergency power at non-cryogenic temperatures. | 02-18-2010 |
| 20120126655 | PERMANENT-MAGNET-LESS MACHINE HAVING AN ENCLOSED AIR GAP - A permanent magnet-less, brushless synchronous system includes a stator that generates a magnetic rotating field when sourced by an alternating current. An uncluttered rotor disposed within the magnetic rotating field is spaced apart from the stator to form an air gap relative to an axis of rotation. A stationary excitation core spaced apart from the uncluttered rotor by an axial air gap and a radial air gap substantially encloses the stationary excitation core. Some permanent magnet-less, brushless synchronous systems include stator core gaps to reduce axial flux flow. Some permanent magnet-less, brushless synchronous systems include an uncluttered rotor coupled to outer laminations. The quadrature-axis inductance may be increased in some synchronous systems. Some synchronous systems convert energy such as mechanical energy into electrical energy (e.g., a generator); other synchronous systems may convert any form of energy into mechanical energy (e.g., a motor). | 05-24-2012 |
| 20150326077 | Synchronous Machine Having a Flux Exciter Remote from the Rotor - A brushless synchronous electrical machine with an unwound rotor comprising poles excited through radial air gaps at both ends of rotor by stationary exciters comprising high permeable cores and electrical winding. | 11-12-2015 |
| 310166000 | Induction | 16 |
| 20080238236 | SWITCHED RELUCTANCE MACHINE - A switched reluctance machine is provided. The switched reluctance machine has a rotor including a rotor core, where the rotor core includes multiple laminated sheets, each of the laminated sheets including multiple ferromagnetic regions and multiple non-ferromagnetic regions formed of a single material. The ferromagnetic and the non-ferromagnetic regions are alternately arranged such that the ferromagnetic regions form multiple rotor teeth and the non-ferromagnetic regions define multiple non-ferromagnetic gaps between the rotor teeth. | 10-02-2008 |
| 20080238237 | INDUCTION MACHINE - An induction machine has a stator and rotor. The stator comprises teeth and slots and stator winding disposed in the slots. The rotor comprises a rotor core having teeth and slots and a rotor-conductor disposed in the rotor slots. Both of the stator core and rotor core are made of laminated steel sheets, and the teeth and slots made of steel sheets are formed by etching. | 10-02-2008 |
| 20090026869 | TRANSVERSE FLUX RELUCTANCE MACHINE AND METHOD FOR MANUFACTURING SAME - A transverse flux machine or transverse flux reluctance machine with a primary part, which is provided with a coil arrangement equipped with at least one phase module ( | 01-29-2009 |
| 20100052459 | Electromagnetic force motor - An electromagnetic force motor includes a stator having a plurality of magnets mounted along a perimeter of the rotor. Preferably, the stator magnets have opposite poles isolated from each other and pointed inward towards the rotor. The rotor will preferably have two appendages. The 1st appendage (called the major appendage for this design) will consist of a highly ferrous, magnetic material with tightly wound coils that will form a magnetic field when introduced to a magnetic field that is generated and collapsed at a frequency of from 0 to 50 khz. The 2nd appendage (called the minor appendage for this design) will consist of a highly ferrous, magnetic material, with a dimension less than or greater than but not the same as the 1st appendage with tightly wound coils numbered more than or less than but not the same as the 1st appendage. The number of appendages on the rotor may be increased or decreased as required. The number of appendages may vary from 1 to infinity. The height of the appendages is limited by the inside of the inside diameter of the motor housing chamber. The rotor will be attached to the drive shaft. The drive shaft will be constructed with non-ferrous material. The inner chamber of the motor that houses the rotor will be filled with a medium that will be used as a dielectric. This medium may vary from air to magnetic liquids. This project will use synthetic oil rated at 5W-30. This medium was chosen because the thermal rating exceeds the curie temperature of a magnet. The stator consists of low voltage high current magnetic blocks located a determined number of degrees apart from each other. These magnetic blocks will be sequenced on at a rate of 0-50 khz for this design. Higher rates may be used for future designs to increase the torque to horsepower ratio. The low voltage high current magnetic blocks will be controlled by controller digital outputs capable of sequencing on/off at a rate sufficient to satisfy the design. | 03-04-2010 |
| 20100207479 | ELECTRIC GENERATOR - An electric power generator for generating a substantially constant frequency output from a varying mechanical speed input such as from a wind or water turbine, comprises a three-phase induction machine in which at least one stator winding is magnetically and electrically decoupled from at least one other stator winding which is arranged to be connected to an external load, and a power source is arranged to excite said at least one stator winding with an AC current at a desired output frequency. The power generator can be directly connected to the mains grid without requiring a power electronics rectifier and inverter stage to convert the generator output to constant frequency AC. | 08-19-2010 |
| 20100253172 | Alternating current electric induction motor - Alternating current electric induction motor, in particular a motor ( | 10-07-2010 |
| 20120086295 | MOTORS WITH QUADRIC SURFACES - A motor having a rotor whose outer surface conforms to a non-degenerate quadric surface, and a matching stator. | 04-12-2012 |
| 20140265708 | DUAL MAGNETIC PHASE ROTOR LAMINATIONS FOR INDUCTION MACHINES - A dual magnetic phase rotor lamination for use in induction machines is disclosed. A rotor assembly is provided that includes a rotor core and a plurality of rotor conductors mechanically coupled to the rotor core and positioned thereabout, with the plurality of rotor conductors positioned within slots formed in the rotor core. The rotor core comprises a plurality of rotor laminations that collectively form the rotor core, with each of the rotor laminations being composed of a dual magnetic phase material and including a first rotor lamination portion comprising a magnetic portion and a second rotor lamination portion comprising a non-magnetic portion, wherein the second rotor lamination portion comprises a treated portion of the rotor lamination that is rendered non-magnetic so as to adjust a leakage inductance of the induction machine. | 09-18-2014 |
| 20150115761 | ELECTRO-HYDRAULIC DEVICE COMPRISING A THREE-PHASE ASYNCHRONOUS MOTOR FOR MOVING A JIB - The invention relates to an electro-hydraulic device for moving a jib for a derricking-jib tower crane, the motor of said device being designed for operation at the average required power. The operating time in an energy-wasting part load range is thus significantly reduced in relation to conventional electro-hydraulic devices for moving a jib. | 04-30-2015 |
| 20150295454 | INDUCTION MACHINE WITH DUAL PHASE MAGNETIC MATERIAL FOR SENSORLESS CONTROL - A rotor lamination that is made of a circular laminar element that has multiple rotor bar openings displaced circumferentially around the element and is made of a magnetic material, such as a dual-phase or bi-state magnetic material. A region of the element has received a treatment, thereby rendering the region so that the relative magnetic permeability of the treated region is less than that of the magnetic material. A rotor core assembly and induction machine that incorporates the rotor lamination and method of manufacture of the rotor lamination are also disclosed. | 10-15-2015 |
| 20160204683 | Multiple winding design for single or polyphase electric motors with a cage type rotor | 07-14-2016 |
| 20170237322 | INDUCTION MOTOR | 08-17-2017 |
| 310168000 | Inductor-type generators (variable reluctance) | 3 |
| 20100007233 | DC Pulse Electric Generating System and Methods Thereof - The present system is generally relates to a new method and apparatus for the creation of a DC electric pulse involving the use of stationary magnets, including permanent magnets and electro-magnets, stationary conductor coils, and a magnetic shield that opens and closes magnetic gateways. When a magnetic gateway is opened and closed, the magnetic flux is disturbed. The magnetic flux penetrates the coil at differing proportions, creating a flow of electrons in the conductor. The present system provides for less heat generation and produces substantially no exhaust fumes or radiation. Further, the present system operates with very low hysteresis losses, eddy currents, magnetic repulsion or drag, destructive back emf, and minimal impedance losses. | 01-14-2010 |
| 20100026129 | METHOD OF GENERATING ELECTRICAL POTENTIAL FROM A STATIONARY MAGNET AND A STATIONARY CONDUCTOR - The present invention relates to a method and device of generating electrical potential by placing a magnetic shielding and/or deflecting material between a stationary magnet and a stationary conductor, then mechanically altering the position of the magnetic shielding and/or deflecting material so as to alternately shield or expose the stationary conductor to the lines of flux radiating from the stationary magnet and across the stationary conductor. This continuous expansion and contraction of the magnetic lines of flux across the stationary conductor generates an electric potential across the output of the stationary conductor. | 02-04-2010 |
| 20140265709 | Steered Flux Generator - The present invention relates to the field of electrical power generators. Structures of the present invention involve the use of steered flux and comprise uniquely simplified and efficient structures, including rotors free of windings and magnets, and stators with coils encircling, not individual stator poles, but multiple poles or the rotor itself. Magneto Motive Force used with the present invention can be provided by either self-bias or external-bias, including superconducting magnets. The present invention may involve the use of unipolar flux. The many embodiments of the present invention capitalize on innovative approaches to and reconfigurations of electrical power generation principles and structures. | 09-18-2014 |
| 310172000 | Shifting field (e.g., shading pole) | 1 |
| 20080303369 | ELECTRIC MOTOR, STATOR FOR AN ELECTRIC MOTOR AND METHOD OF MANUFACTURING SAME - An electric machine has a rotor and includes a first portion that is substantially rectangular and includes a rotor aperture configured to receive a portion of the rotor. A second portion is separate from and connected to the first portion. The second portion is substantially U-shaped and includes a first leg, a second leg, and a base. A first coil surrounds a portion of the first leg and a second coil surrounds a portion of the second leg. | 12-11-2008 |
