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Field or excitation windings or structure

Subclass of:

310 - Electrical generator or motor structure

310010000 - DYNAMOELECTRIC

310040000 - Rotary

310179000 - Windings and core structure

Patent class list (only not empty are listed)

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Class / Patent application numberDescriptionNumber of patent applications / Date published
310180000 Field or excitation windings or structure 89
20110181143STATOR FOR USE IN ELECTRIC ROTATING MACHINE - A stator for use in an electric rotating machine is provided which includes a stator winding wound through slots of a stator core. The stator winding is made up of a plurality of conductor segments connected together. Each of the conductor segments includes an in-slot portion disposed inside one of the slots and out-slot portions extending from the in-slot portion outside at least one of the ends of the stator core. Ends of the out-slot portions are joined together to form the stator winding. The joints of the ends of the out-slot portions have a given pattern of texture formed on surfaces thereof and coated with an insulating material. The pattern of texture enhances the adhesion of the insulating coatings to the surfaces of the joints and ensures the stability in electric insulation of the joints.07-28-2011
20130043758STATOR - A stator includes a core-back portion, teeth portions, insulators, and coils. The teeth portions extend radially from a circumferential surface of the core-back portion. The insulators are respectively mounted to the teeth portions. The coils are respectively mounted to the insulators. A tip end of the tooth portion has a circumferential width equal to or smaller than that of a base end of the tooth portion. The tip end has an axial width equal to or smaller than that of the base end. The insulator includes a tube portion accommodating the tooth portion. The tube portion includes a first opening existing at the tip end and a second opening existing at the base end. The first opening has an axial width smaller than an axial width of the second opening in a state that each of the insulators is removed from each of the teeth portions.02-21-2013
20130069472STATOR WINDING FOR A TRANSVERSE FLUX MACHINE AND METHOD FOR THE PRODUCTION OF A STATOR WINDING - The invention relates to a stator winding for a transversal flow machine, the stator winding (03-21-2013
20120286614METHOD AND KIT FOR GENERATOR ENHANCEMENT - In certain exemplary embodiments, a generator field upgrade kit includes a design modification package configured to be installed in a generator field of a generator as a retrofit to mitigate damage of the generator field due to high cyclic duty of the generator. The design modification package includes a plurality of individual modifications that are selectable based on specific operational and performance parameters of the generator.11-15-2012
20100176683WOUND FIELD ELECTRICAL MACHINE FLAT BRAIDED WIRE MAIN ROTOR CROSSOVER ASSEMBLY - A high speed aircraft generator may utilize a prefabricated crossover subassembly to interconnect field coils. The crossover may include two attachment leads interconnected with a section of braided wire. The braided wire may remain free of brazing filler metal after the crossover subassembly is brazed into position between field coils of the generator. Consequently, the crossover may remain flexible and may have reduced susceptibility to fatigue failure that may otherwise result from circumferential relative displacement of the field coils from one another during changes of rotational speed of the field coils.07-15-2010
20130214633ELECTRIC MACHINE AND STATOR FOR SAME - The invention relates to a stator for an electric machine, comprising at least two sub-stators having respective grooves for receiving windings. The groove openings of the two sub-stators are displaced in relation to each other in the circumferential direction. The invention further relates to an electric machine comprising the stator. The two sub-stators are combined with each other axially and/or in the circumferential direction.08-22-2013
20100148615TERMINAL MODULE FOR ROTATING ELECTRIC MACHINE, ROTATING ELECTRIC MACHINE, AND MANUFACTURING METHOD THEREOF - A terminal module includes a ring-shaped rail having a groove extending in a circumferential direction, a bus bar fitted into the groove, and a connector portion having a connector terminal connecting the bus bar with an external wire. The rail has a phase determining hole for determining a phase of rotation of the rail about an axial direction.06-17-2010
20110127872Coil For An Electric Machine And Method For Producing A Coil - The invention relates to a coil (06-02-2011
20110025160RECTANGULAR CROSS-SECTION WINDINGS FOR ELECTRICAL MACHINE ROTORS - An apparatus is provided for an electrical machine rotor. The apparatus comprises a cylinder and a first slot proximate to an edge of the cylinder. The first slot is at least partially closed. The apparatus further comprises a hairpin winding disposed within the first slot.02-03-2011
20100123364SUBSTANTIALLY PARALLEL FLUX UNCLUTTERED ROTOR MACHINES - A permanent magnet-less and brushless synchronous system includes a stator that generates a magnetic rotating field when sourced by polyphase alternating currents. An uncluttered rotor is positioned within the magnetic rotating field and is spaced apart from the stator. An excitation core is spaced apart from the stator and the uncluttered rotor and magnetically couples the uncluttered rotor. The brushless excitation source generates a magnet torque by inducing magnetic poles near an outer peripheral surface of the uncluttered rotor, and the stator currents also generate a reluctance torque by a reaction of the difference between the direct and quadrature magnetic paths of the uncluttered rotor. The system can be used either as a motor or a generator05-20-2010
20100187936Rotary electric machine with coil member and method of manufacturing coil member - In a rotary electric machine, a field coil member includes a first edgewise coil composed of a plurality of coaxially layered convolutions. The coaxially layered convolutions are wound around the outer periphery of the first pole core. The field coil member includes a second edgewise coil composed of a plurality of coaxially layered convolutions. The coaxially layered convolutions are wound around the outer periphery of the second pole core. The field coil member includes a link portion connecting between the first edgewise coil and the second edgewise coil in series. One of the first and second edgewise coils has one coil end extending therefrom to cross over the link portion at a crossover portion thereof. The crossover portion between the one coil end and the link portion is arranged to be non-overlapped with the convolutions of the one of the first and second edgewise coils.07-29-2010
20100019605INDUCTANCE AUGMENTER FOR AN ELECTRIC MACHINE - The electric machine comprises a rotor and stator, the rotor and stator having generally equal axial lengths. The stator has at least one primary and at least one control winding disposed around the stator. The electric machine comprises a stator extension of a magnetic material. The stator extension is disposed coaxially with the stator and has only the at least one control winding wrapped therearound. The stator extension extends axially adjacent the stator beyond an axial terminus of the rotor and defines a magnetic circuit around the at least one control winding. The stator extension is configured such that in use, the magnetic circuit remains unsaturated thereby increasing inductance of at least one control winding in an electric alternator/motor.01-28-2010
20110181144STATOR FOR ELECTRIC ROTATING MACHINE - A stator for an electric rotating machine includes a stator coil that is formed of a plurality of electric wire segments each of which is comprised of an electric conductor and an insulating coat covering the electric conductor. The electric wire segments include a joined pair of first and second electric wire segments. Each of the first and second electric wire segments has an end portion of a first predetermined length where the electric conductor is not covered by the insulating coat. The end portions of the first and second electric wire segments are joined together. For each of the first and second electric wire segments, the insulating coat has, at its boundary with the end portion of the electric wire segment, a peeled portion of a second predetermined length which has a distal end peeled from the electric conductor and a proximal end remaining attached to the electric conductor.07-28-2011
20120326551STATOR, MOTOR, METHOD FOR MANUFACTURING CONDUCTOR AND METHOD FOR MANUFACTURING THE STATOR - A stator includes a core having a plurality of slots and a plurality of U-shaped conductors, which are inserted in the corresponding slots. Each of the conductors has a pair of legs and a joint portion that connects the legs together. Each slot receives four legs and each of the legs in the slot is one leg of the corresponding one of the conductors. Two of the four conductors corresponding to the four legs inserted in each slot are overlapped with each other at the joint portions as viewed at least circumferentially.12-27-2012
20130154427STATOR OF ROTARY ELECTRICAL MACHINE - A stator of a rotary electrical machine, includes a core unit configured by a plurality of core assemblies each including a laminated steel plate, an insulator, and a coil; a bus ring facing the core unit; and an accommodating box arranged at the insulator, accommodating an end portion of the coil, and including radially inward and outward engaged portions, the insulator including radially inward and outward extending portions, the radially inward extending portion including a radially inward engagement portion about which the accommodating box rotates in a radial direction of the core unit from an initial attachment position to an attached position and which engages with the radially inward engaged portion, the radially outward extending portion including a radially outward engagement portion which engages with the radially outward engaged portion in accordance with the rotation of the accommodating box to move the accommodating box in the radial direction.06-20-2013
310181000 Combined permanent and electromagnet 27
20090200886DYNAMOELECTRIC MACHINE - Resin pooling grooves are disposed so as to extend over entire regions in a thickness direction of a first magnet holder on two sides of a bottom surface in a width direction of a first receiving groove, and resin pooling grooves are also disposed so as to extend over entire regions in the thickness direction of the first magnet holder on two side surfaces of the first receiving groove near the bottom surface. A first resin injection aperture is disposed through the first magnet holder so as to communicate with the resin pooling grooves over an entire region in the thickness direction. A first permanent magnet is held by the first magnet holder by fitting the first permanent magnet into the first receiving groove together with a first magnet cover, and injecting a resin material into the resin pooling grooves through the first resin injection aperture and hardening it.08-13-2009
20090045691FIELD CONTROLLABLE ROTATING ELECTRIC MACHINE SYSTEM WITH MAGNETIC EXCITATION PART - In a magnet-exciting rotating electric machine, a magnetic excitation part for supplying a magnetic flux between a magnetic salient pole and an armature is composed to be divided into two so as to be capable of being relatively displaced. In this structure, the magnetic flux from the field magnet is divided into a main magnetic flux pathway that passes through the armature side and a bypass magnetic flux pathway that does not pass through the armature, and thereby, the magnetic flux of the main magnetic flux pathway is changed. The magnetic resistances of the main magnetic flux pathway and the bypass magnetic flux pathway are composed to be approximately equal, and then a magnetic force preventing the relative displacement is suppressed small. Thereby, the rotating electric machine system and the magnetic field control method in which magnetic field control is easy are provided.02-19-2009
20130162093SYNCHRONOUS ROTARY ELECTRIC MACHINE HAVING A HYBRID-EXCITATION ROTOR - A machine (06-27-2013
20130162094SYNCHRONOUS ROTARY ELECTRIC MACHINE HAVING HYBRID- EXCITATION ROTOR - A machine (06-27-2013
20100013340ROTATING ELECTRICAL MACHINE - A rotating electrical machine is disclosed, the machine comprising a stator 01-21-2010
20090295249HYBRID-TYPE SYNCHRONOUS MACHINE - A rotor core has permanent magnets. Magnetic flux of the permanent magnet of an even-numbered rotor magnetic pole part is guided in an axial direction by an axial magnetic path member. Magnetic flux of the permanent magnet of an odd-numbered rotor magnetic pole part is guided into a soft magnetic inner cylindrical part. The axial end faces of the inner cylindrical part and the axial magnetic path member protrude from the rotor core in the axial direction and face a stationary magnetic path member with a small gap therebetween. The amount of magnetic flux of the magnet, which the permanent magnet applies to a stator core is adjusted by an excitation current of an excitation coil wound on the stationary magnetic path member.12-03-2009
20080238238Apparatus and process for generating energy - Energy is generated by an apparatus and process which utilize magnetic forces to move a rotor in a circular direction to turn a rotor shaft. This apparatus and process convert magnetic energy into mechanical force, kinetic energy or electrical energy.10-02-2008
20100133942Permanent Magnet Arrangement for Generator Rotor - An electric generator rotor having one or more permanent magnets coupled thereon. The permanent magnets provide a constant magnetic field in the rotor at all times, therein minimizing the effect of rotor residual magnetism on the start-up characteristics of the electric generator. The type and placement of the one or more permanent magnets on the rotor and/or magnetic field confinement techniques may be utilized to control spatial distribution of magnetic field within the rotor.06-03-2010
20110227442ELECTRIC MACHINE - The invention relates to a synchronous machine with hybrid energisation, in particular a generator for supplying the electrical system of a motor vehicle, comprising a laminated stator (09-22-2011
20130187508Shutter with Bistable Actuator Having Power-Free Magnetic Blade Return - The instant invention teaches a monostable shutter with magnetic blade return using a bistable actuator with blade motion constrained to provide drive force in a single direction and permits the use of compact bistable coil for continuous use by a circuit that applies a high voltage at the beginning of drive that decays to a lower voltage to prevent coil burn out.07-25-2013
20100289371INTERPOLE ASSEMBLY FOR ROTATING ELECTRICAL MACHINE11-18-2010
20110043068DYNAMOELECTRIC MACHINE - A dynamoelectric machine that can suppress increases in rotor inertia to extend belt service life and increase field magnetomotive force to increase output. In the dynamoelectric machine, first and second magnetic guidance members are fitted into first and second holding grooves that are disposed so as to extend axially on facing portions of first and second trough portions radially outside inner wall surfaces, and are disposed so as to span over first and second trough portions. First and second permanent magnets that are magnetically oriented in a reverse direction to a magnetic field that originates from a field coil are fitted into and held by interfitting grooves of the first and second magnetic guidance members so as to face inner circumferential surfaces near tip ends of second and first claw-shaped magnetic pole portions so as to have a predetermined clearance.02-24-2011
20110127873ROTOR FOR ROTARY ELECTRIC MACHINE WITH REDUCED-MASS INTERPOLAR STRUCTURES - A rotor with poles in the form of claws, of a rotary electrical machine. This rotor comprises a plurality of interpolar magnetic assemblies. On a radial cross-sectional plane, a first total magnet surface of a section of the magnetic assembly is smaller than a second surface defined by the product of the radial height of a face (h) of the magnetic assembly (06-02-2011
20090322176Synchronous motor with rotor having suitably-arranged field coil, permanent magnets, and salient-pole structure - A rotor of a synchronous motor includes a rotating shaft, a plurality of segments, a plurality of permanent magnets, and a field coil. The segments are located radially outward of the rotating shaft and arranged in the circumferential direction of the rotating shaft at a predetermined pitch with spaces formed therebetween. Each of the segments has a recess making up a magnetic reluctance portion and an opposite pair of ends making up salient-pole portions. Each of the permanent magnets is disposed in one the spaces between the segments with a predetermined orientation of its N and S poles. The field coil is wound around the segments to extend in the circumferential direction of the rotating shaft through the recesses of the segments. The field coil creates, when energized with DC current, magnetic flux which magnetizes the pair of ends of each of the segments in opposite directions.12-31-2009
20110084567ROTATING ELECTRIC MACHINE SYSTEM - A rotating electric machine system includes a rotor having a rotor plane. The rotor includes magnetic salient poles of more than one in a circumferential direction on the rotor plane. Adjacent magnetic salient poles are magnetized in different polarities from each other by a permanent magnet. A control magnet is arranged in an inside part of the adjacent magnetic salient poles. An excitation coil is placed so as to make an excitation flux collectively in the rotor. The magnetization state of the control magnet where the magnetic flux by the armature coils and the excitation flux flow in a same direction is changed irreversibly. An amount of the magnetic flux flowing through the armature coils is controlled by changing the magnetization state of the control magnet in accordance with an output of the rotating electric machine system so that the output is optimized.04-14-2011
20100026130Electric rotary machine for vehicle - An AC alternator for a vehicle has a rotor having a pair of pole cores, and a stator. A plurality of claw magnetic pole parts are formed in the pole cores. A permanent magnet is placed between a pair of the claw magnetic pole parts so as to prevent leakage of magnetic flux through the area between the adjacent claw magnetic pole parts. The stator and the rotor are placed in the AC alternator so that the stator faces the rotor at a spacing of predetermined intervals. Flanges are formed at both sides of each of the claw magnetic pole parts. The presence of the flanges fixes the permanent magnets to the pole cores, and prevents them from moving toward the outer radius direction measured from the rotary shaft of the rotor. In particular, the thickness of each of the flange parts is increased from the front end part to the bottom part thereof.02-04-2010
20100019606ROTATING ELECTRIC MOTOR - A rotating electric motor includes a stator core, a rotational shaft capable of rotation, a field yoke allowing a flow of magnetic flux in an axial direction, first and second rotor cores fixedly installed on the rotational shaft, a first magnet fixedly installed between the first rotor core and the second rotor core, a first rotor teeth formed at the first rotor core, a second magnet provided alongside of the first rotor teeth in the circumferential direction of the first rotor core, a second rotor teeth formed at the outer surface of the second rotor core, protruding outwardly in the radial direction, a third magnet provided alongside of the second rotor core in the axial direction, and windings that can control the density of magnetic flux between at least one of the first rotor core and second rotor core and the stator core.01-28-2010
20100096941DYNAMOELECTRIC MACHINE - A dynamoelectric machine including first and second permanent magnets held by first and second magnet seats on first and second yoke portions so as to face inner circumferential surfaces of tip end portions of first and second claw-shaped magnetic pole portions. The first and second permanent magnets are magnetically oriented in a reverse direction to orientation of a magnetic field that the field coil produces. The dynamoelectric machine enables permanent magnet holding reliability to be increased, induced voltage during no-load de-energization to be suppressed, and thermal demagnetization of magnets due to high-frequency magnetic fields that are induced by stator slots to be avoided.04-22-2010
20120056502AC Electric Machine With Claw Poles - An AC claw-pole electric motor includes a casing, a stator connected with the casing, a rotor and two exciting parts. The rotor includes a rotor shaft (03-08-2012
20120248921ROTARY ELECTRIC MACHINE WITH ARMATURE MAGNETIC REACTION COMPENSATION - The machine of the invention includes an inductor (10-04-2012
20100207480ELECTRIC MACHINE COMPRISING A ROTOR WITH HYBRID EXCITATION - A synchronous electric machine having a fixed stator, a multi-phase stator winding and having a rotor which has poles, excited in a predefined sequence, over its circumference, the number of poles being changeable as a function of the intensity and the direction of a field current in at least one field coil of the rotor. For improving the efficiency of the machine and for reducing the number of field coils and the entire coil cross section it is provided that the rotor has a laminated core, laminated in the axial direction, which has grooves on the circumference for accommodating the at least one field coil and that the at least one field coil is situated on the circumference of the rotor with a step size which corresponds to the pole pitch of the lower number of poles.08-19-2010
20120212096ROTARY ELECTRIC MACHINE - A bobbin is mounted to a rotor such that a rotation arresting portion is housed in a space that is formed by a rotation arresting portion housing recess portion and a stepped portion so as to restrict circumferential movement, and a permanent magnet is made into a quadrangular prism that has a rectangular bottom surface, and is held by a magnet holding seat by placing a bottom surface on an upper surface of a magnet holding portion, and fixing to the magnet holding seat a cover that is mounted from radially outside to restrict circumferential, axial, and radial movement.08-23-2012
20120187794LUNDELL TYPE ROTATING MACHINE - Provided is a Lundell type rotating machine with high efficiency and high output, which has a rigid and magnetically advantageous magnet retention structure. A rotor iron core includes laminated magnetic-pole members mechanically and magnetically coupled to two laminated magnetic end plates, which extend in an axial direction so as to be brought into meshing engagement with each other to constitute a Lundell type rotor iron core, and permanent magnets provided between the magnetic-pole members. The magnetic-pole members are retained in predetermined positions between the magnetic end plates by dovetail grooves of a non-magnetic retention body over substantially the entire lengths. The permanent magnets are held in direct contact with the magnetic-pole members so as to be interposed therebetween. Thus, the magnet retention structure which is mechanically rigid and magnetically highly efficient even when increased in size can be obtained.07-26-2012
20110001383DYNAMOELECTRIC MACHINE - The present invention provides a dynamoelectric machine that enables permanent magnets to be held stably in trough portions that are formed on portions of a yoke portion that are positioned between adjacent claw-shaped magnetic pole portions.01-06-2011
20100231080ALTERNATING-CURRENT DYNAMO-ELECTRIC MACHINE - An alternating-current dynamoelectric machine according to the present invention includes: a stator including: a stator core in which slots that extend in an axial direction are formed on an inner side; and a stator winding that is mounted to the stator core by winding conducting wires into the slots; and a rotatable rotor including: a field winding that is disposed inside the stator; a rotor core constituted by a first pole core and a second pole core that each have claw-shaped magnetic poles that are disposed so as to cover the field winding and that alternately intermesh with each other; and first and second permanent magnets that are respectively disposed on two facing side surfaces of adjacent claw-shaped magnetic poles and that have magnetic fields that are oriented so as to reduce leakage of magnetic flux between the claw-shaped magnetic poles, and a magnetic body is disposed between a pair of the first and second permanent magnets.09-16-2010
20110273050ADJUSTABLE AXIAL-FLUX DISC MOTOR - An adjustable axial-flux disc motor, that is used in a flat space formed at a side or at the center of a wheel center for driving the wheel to rotate. The motor is activated to perform a rotation movement by the interactions of an electromagnetic field formed from the passing of an electric current through the armatures of its stator and a magnetic field resulting from the permanent magnet of its rotator. Moreover, there is a circular air gap sandwiched between the stator base and the rotator base, and the permanent magnet is further surrounded by coils. By adjusting the excitation current of the coils, the magnetic flux intensity can be modulated accordingly, and as the air gap magnetic flux is varied with the relative positioning of the stator and the rotator, the output characteristic of the motor will be varied accordingly.11-10-2011
20110210637ROTOR FOR AN ELECTRIC MACHINE WITH REDUCED DETENT TORQUE - The invention relates to an electric machine, in particular to a generator for supplying the electrical system of a motor vehicle, comprising a laminated rotor (09-01-2011
310182000 With short-circuited winding or conductor 2
310183000 Damper winding 2
20090230804ROTOR ASSEMBLY FOR ELECTROMECHANICAL MACHINE - A rotor assembly for an electromechanical machine includes a rotor core, an outer sleeve and an inner sleeve. The rotor core includes an outer diameter, and the outer sleeve is positioned about the outer diameter. The inner sleeve is positioned between the rotor core and the outer sleeve. One of the outer sleeve and the inner sleeve dampens electromagnetic flux generated by the rotor assembly.09-17-2009
20130181568BRUSHLESS STARTER GENERATOR - A brushless starter generator includes a wound field generator having a rotor that includes a damper winding, wherein the damper winding includes a plurality of poles. Also included is at least one pole face disposed within each of the plurality of poles, wherein the at least one pole face comprises a slot opening. Further included is at least one damper bar relatively entirely filling the slot opening.07-18-2013
310184000 Plural field windings 15
20130043759POLYPHASE DYNAMOELECTRIC MACHINES AND STATORS WITH PHASE WINDINGS FORMED OF DIFFERENT CONDUCTOR MATERIAL(S) - A stator for a polyphase dynamoelectric machine includes a stator core and windings positioned about the stator core. The windings include at least a first phase winding and a second phase winding. The first phase winding is formed of at least one electrical conductor material that is not present in the second phase winding.02-21-2013
20110278979Electric motor comprising an inductor with a superconducting element incorporated between coils - An electric motor includes a magnetic field induction device and an induced field device, rotating relative to one another, wherein the induction device comprises a set of two conducting coils around an axis, through which currents travel in the same direction, and a central part, placed between the two coils, comprising a superconducting element placed in a plane that is inclined relative to the axis of the coils, channeling the magnetic field produced by the coils on either side of the inclined plane.11-17-2011
20130119813COIL WINDING METHODS AND STRUCTURES FOR A SLOTLESS STATOR IN A MOTOR - A method for making a poly-phase field winding for a slotless stator includes: forming the first coil group by winding an insulated wire for each coil winding in a first direction around a mandrel; axially shifting along the mandrel the insulated wire from a trailing edge of each coil winding a distance substantially equal to one half of twice the number of coil groups multiplied by the number of coil windings minus one times the width of one of the completed windings to position the wires at a leading edge of each of coil winding in the second coil group; forming the second coil group by winding the insulated wire for each coil winding in the first direction; removing the mandrel from the wound coil groups; collapsing the wound coil groups to a single layer web, and wrapping the single layer web into a cylinder to form the field winding.05-16-2013
20090243417SINGLE STAGE STARTER/GENERATOR WITH ROTOR QUADRATURE AC EXCITATION - When driven by a variable speed prime mover, a generator system provides relatively constant frequency AC power by independently controlling the main rotor flux rotational speed. The generator system includes an exciter stator that induces current in the exciter rotor windings at a desired frequency and phasing. The exciter rotor windings are electrically connected to and located in a common core as the main rotor windings to provide two-phase excitation current to the main rotor windings. The exciter stator winding is also located in a common core as the main generator stator windings. Excitation is supplied to the exciter stator from an exciter controller, which controls the frequency and phasing of the exciter excitation, based on the rotational speed and rotor position of the generator, to maintain a constant output frequency. The exciter frequency control function of the exciter controller may be eliminated when the generator system is driven by a constant speed prime mover or when a narrow band variable frequency output is required.10-01-2009
20080224560Electric Machine and Manufacturing Process for Same - To provide an electric machine capable of being improved in both fabricability and reliability, and a process for manufacturing the machine.09-18-2008
20080197740Modular motor or alternator assembly - A modular motor or alternator assembly which comprises an alternator or a motor having a rotor with longitudinal lobes and no windings, commutators, slip rings, magnets, or laminations. A number of modules are provided including two end bell modules, a stator and field coil module, a field coil module, and a stator module. A plurality of stator and field coil modules, field coil modules, and stator modules may be combined with the two end bell modules and a rotor to create a wide variety of motors or alternators having using combinations of standard modules. For instance, motor of various horsepowers can be created using multiple standardized modules.08-21-2008
20120256510ROTARY ELECTRIC MACHINE - A rotary electric machine includes a stator that creates a rotating magnetic field, and a rotor around which a rotor winding is wound so that induced electromotive force is created by a harmonic component of the rotating magnetic field, and in which a magnetic pole is created through the induced electromotive force. The stator has an auxiliary pole that is a leading portion that leads the harmonic component from the stator to the rotor.10-11-2012
20130187509STATOR FOR ELECTRIC ROTATING MACHINE AND METHOD OF MANUFACTURING THE SAME - Disclosed is a method of manufacturing a stator for an electric rotating machine. The method includes the steps of: (1) forming a plurality of planar electric wires, each of the planar electric wires including a plurality of in-slot portions to be received in slots of a stator core and a plurality of turn portions to be located outside of the slots to connect the in-slot portions; (2) rolling each of the planar electric wires through plastic deformation into a spiral or circular-arc shape; (3) forming a hollow cylindrical stator coil by assembling the rolled electric wires through operations of making relative axial movement therebetween; and (4) assembling the stator core and the stator coil together to form the stator.07-25-2013
310185000 Plural sets of poles 4
20100026131BRUSHLESS ALTERNATOR WITH CLAW POLE ROTOR - It is designed for accumulator batteries charging and for electrical energy generating with rectified voltage for movable and unmovable vehicles and/or objects.02-04-2010
20120007459Rotating Electric Machine for Generating a Constant Frequency AC Power Supply from a Variable Speed Primemover - Disclosed is a rotating electric machine for generating a constant frequency AC power supply from a variable speed primemover including: a stator wound with two sets of isolated polyphase windings having the same number of poles, with the polyphase windings located at about 90 degree displacement in space between them, and a rotor wound with two sets of isolated polyphase windings having the same number of poles and placed at about 90 degree displacement in space between them. The rotor has two winding terminals interconnected either internally or externally to the machine with mutually reverse phase sequence. When one set of stator winding is energized by an AC power supply of a given frequency and voltage, and the rotor shaft is rotated by an external means in the same direction as that of the rotating field of the stator.01-12-2012
20110241471ROTOR OF ELECTRIC ROTATING MACHINE - A rotor of alternator has core layer units serially located along axial direction. Each unit has a field coil generating magnetic flux and two rotor cores receiving the flux on respective sides of the coil in axial direction. Each core has a first yoke portion located on inner side of the coil, a second yoke portion extending from the first yoke portion toward the outer side and magnetic poles extending from the second yoke portion in the axial direction. The poles of one core and the poles of the other core in each unit extend toward different axial sides and are alternately arranged in circumferential direction on the outer side of the coil. A ratio of the outer circumferential diameter of the first yoke portions to the rotational diameter of the poles is lower than 0.54.10-06-2011
20120228980TWO-PHASE BRUSHLESS DC MOTOR - A brushless motor includes a two-phase winding stator having 4×n winding poles and auxiliary poles provided between the winding poles, and a rotor constituted by 6×n permanent magnet rotating poles having divided angle. The two-phase brushless motor can be driven by a control device for the two-phase motor which can transform electric power and rectify electronically. The two-phase brushless DC motor can increase a permeance coefficient of the rotor, improve the efficiency and the starting of the motor, and reduce torque ripple and noise thereof.09-13-2012
310186000 Interpole, compensating or neutralizing poles 1
20090189473BRUSHLESS MOTOR SYSTEM FOR A VEHICLE FUEL PUMP - A rotor for a brushless motor is resistant to degradation in alternative fuels and has desirable magnetic properties. A stator for a brushless DC motor includes coils wound both clockwise and counterclockwise around teeth of a back iron. Pairs of the coils are electrically connected in parallel.07-30-2009
310187000 Slotted or divided pole 2
20100066193STATOR OF ELECTRIC ROTATING MACHINE AND WINDING METHOD THEREOF - In a stator of an electric rotating machine such as a motor, there is provided with laminated 24 yoke pieces that form a yoke of circular shape when assembled and the yoke pieces are made rotatable relative to each other. Similarly laminated 24 teeth are each connected to each of the yoke pieces and a winding is wound on the teeth. In the stator, the teeth radially protrude inward in the yoke when the yoke pieces are assembled as the yoke such that some gap between adjacent teeth can be widened than others. Specifically, each of the yoke pieces has a first plate bored with a hole and a second plate formed with a projection and the plurality of the yoke pieces are rotatably connected through the holes and the projections to enable some gaps to be widened than others03-18-2010
20120161567STATOR FOR ELECTRIC ROTATING MACHINE AND METHOD OF MANUFACTURING THE SAME - A stator includes a stator core and a stator coil formed of electric conductor segments. Each of the electric conductor segments has a pair of in-slot portions, a first end portion, and a pair of second end portions. The in-slot portions are respectively received in corresponding two slots of the stator core. The first end portion extends, on one axial side of the stator core, to connect the in-slot portions. The second end portions extend respectively from the in-slot portions on the other axial side of the stator core. Each of the second end portions includes an oblique part and a distal part. The oblique part extends obliquely with respect to an axial end face of the stator core. Corresponding pairs of the distal parts of the electric conductor segments are joined by welding. The oblique parts of the electric conductor segments have a higher hardness than the in-slot portions.06-28-2012
310189000 Variable length or tapped winding 1
20100013341ELECTRIC MACHINE WITH STEPPED WINDING STRUCTURE - An electric machine for direct drive or braking applications with coils providing improved power efficiency and heat transfer is disclosed. The electric machine has a coil body and a winding with a plurality of turns wound on the coil body. Each of the various turns is located in a separate plane. Respective end sections of two different turns are connected by a connecting element, with a major directional component of the connecting element being oriented in an axial direction perpendicular to the plane of one of the two turns. Axially adjacent turns can thereby be connected to one another together. This arrangement reduces or eliminates empty spaces in the slots, particularly when the turns are made from flat wire.01-21-2010
310191000 Adjustable magnetic structure 8
20120286616MOTOR - A clutch mechanism moving together with an actuator allows coupling or decoupling an inner rotor to or from a power shaft, thereby controlling a rotation angle. This structure allows a polarity of a magnetic pole of the inner rotor to be the same as that of an opposing magnetic pole of an outer rotor when the motor is driven at a low rpm, so that magnetic fluxes inter-linking with windings can be increased, which results in greater torque. When the motor is driven at a high rpm, the structure allows the polarity of the magnetic pole of the inner rotor to be different from that of the opposing magnetic pole of the outer rotor, so that an amount of leakage flux is increased, and the magnetic fluxes inter-linking with the winding are decreased. As a result, an induction voltage is lowered and a high rpm range is widened.11-15-2012
20120286615Permanent Magnet Motor with Field Weakening - A permanent-magnet electrical machine is disclosed in which the rotor or stator have at least one movable iron segment. A magnetic field of the electric machine is weakened when the movable iron segment is moved a position away from the rotor or stator, respectively. When the movable iron segment is in a first position, such as in contact with the rotor or stator, the field strength is high. When the movable iron segment is in a second position in which the movable iron segment is displaced away from the rotor or stator, the field strength is low. The ability to weaken the field strength causes the constant-power, speed ratio to be increased and thereby increases the utility of the electric machine for applications in which a wide speed range is desired. The electric machine may be used as both a permanent-magnet motor and generator.11-15-2012
20090295250Magnet Type Brushless Generator and Magnet type Brushless Starter - There is provided a magnet type brushless generator capable of particularly controlling an output voltage to be uniform even in a driving operation at a variable rpm from a low-speed rotation to a high-speed rotation.12-03-2009
20090127963ELECTRIC MOTOR WITH FIELD WEAKENING - An electric motor comprising a rotor, a stator and a field weakening device. The rotor has a plurality of magnets mounted thereto, and the stator is located adjacent to the rotor and has a plurality of slots defined therein. The slots define raised teeth and are wound with electrical wiring to generate a magnetic field when the wiring is energized with current. The field weakening device is made from a highly magnetically permeable material and a comparatively lower magnetically permeable material. The field weakening device is disposed between the rotor and the stator and is selectively movable between a first position to align the highly magnetically permeable material between the teeth of the stator and the magnets of the rotor and a second position to align the comparatively lower magnetically permeable material between the teeth of the stator and the magnets of the rotor.05-21-2009
20110101815Electric Motor or Generator with Mechanically Tuneable Permanent Magnetic Field - Apparatus and method for tuning the magnetic field of brushless motors and alternators to obtain efficient operation over a broad RPM range. The motor or alternator includes fixed windings (or stator) around a rotating rotor carrying permanent magnets. The permanent magnets are generally cylindrical and have North and South poles formed longitudinally in the magnets. Magnetically conducting circuits are formed by the magnets residing in magnetic conducting pole pieces (for example, low carbon or soft steel, and/or laminated insulated layers, of non-magnetizable material). Rotating the permanent magnets, or rotating non-magnetically conducting shunting pieces, inside the pole pieces, either strengthens or weakens the resulting magnetic field to adjust the motor or alternator for low RPM torque or for efficient high RPM efficiency. Varying the rotor magnetic field adjusts the voltage output of the alternators allowing, for example, a windmill generator, to maintain a fixed voltage output.05-05-2011
20110074238Electric Motor With Axially Movable Rotor Assembly - A mechanical structure (03-31-2011
20110133592ROTARY ELECTRICAL MACHINE - A rotary electrical machine has a mechanism capable of varying an output characteristic, without increasing mechanical loss, or without consuming the electric power that does not contribute to increasing torque. The rotary electrical machine has a rotor with N pole and S pole magnets alternately and fixedly disposed thereon. An end surface, (which opposes the rotor), of each of a plurality of first teeth positioned on a first stator section is broader than that of the opposite surface thereof, and a winding is wound around a portion between both of the end surfaces. A second stator section has second teeth, corresponding the number of the first teeth, and which has no winding. The second teeth are disposed to oppose the end surfaces of the respective first teeth, and each second tooth is reciprocally movable between a reference position at which the second tooth directly opposes the respective first tooth and a maximum movable position located at the right center position between the respective end surfaces. At the reference position, a strong magnetic flux flows into the entire first tooth from each magnet. At the maximum movable position, a weak magnetic flux flows over the end surface of each first tooth. A middle amount of the magnetic flux flow occurs at a middle moved position.06-09-2011
20100231081MOTOR - A motor is provided with: an inner rotor having inner permanent magnets arranged in a peripheral direction and an outer rotor having outer permanent magnets arranged in the peripheral direction, the mutual axes of rotation of the inner rotor and the outer rotor being arranged coaxially, and a rotating device capable of making at least one of the inner rotor and the outer rotor rotate around the axes of rotation so as to change the relative phase between the rotors, wherein the rotating device includes: a first member which is integrally and rotatably provided with respect to the outer rotor; and a second member which is integrally and rotatably provided with respect to the inner rotor and which defines pressure chambers inside the inner rotor with the first member, and wherein a working fluid is supplied to the pressure chambers, thereby changing the relative phase between the rotors.09-16-2010
310194000 Coil supports and spools 21
20100072852DYNAMOELECTRIC ROTOR - Each of first and second pole cores has a boss portion, six core flange portions; and six claw-shaped magnetic pole portions, the first and second pole cores being disposed such that the claw-shaped magnetic pole portions face each other so as to intermesh and leading end surfaces of the boss portions are abutted with each other. The boss portions include coil mount portions in which cross-sectional shapes that are perpendicular to the central axis are hexagons; and abutted portions that have circular cross sections and that are disposed so as to protrude from leading ends of the coil mount portions. Radially-inner surfaces of the claw-shaped magnetic pole portions face side surfaces of the coil mount portions and are parallel to the side surfaces of the coil mount portions at the cross sections that are perpendicular to the central axis.03-25-2010
20100096942Rotor or a stator for a superconducting electrical machine - A rotor (or a stator) for a superconducting electrical machine includes a mounting that is maintained at substantially ambient temperature during operation of the electrical machine and a field coil support structure. A plurality of superconducting field coils are maintained at cryogenic temperatures during operation of the electrical machine and are supported by the field coil support structure. At least one coupling element is used to fix the field coil support structure to the mounting. The field coil support structure is preferably fixed to the mounting by a plurality of substantially circumferentially extending coupling elements at a first and second axial end of the field coil support structure and the mounting such that the mounting and field coil support structure are substantially separated over their axial lengths by a vacuum gap.04-22-2010
20130038167ROTATING ELECTRICAL MACHINE - A rotating electric machine, e.g. hydrogenerator, includes a rotor, including a rotor laminate stack extending in a machine axis direction and having a rotor winding which forms a winding head at each of the ends of the rotor laminate stack. The winding head is fastened to a winding head rim, which is arranged concentrically within the winding head and adjoins the rotor laminate stack in the axial direction, to intercept centrifugal forces by bolts passing radially through the winding head, and a fastening designed to safely absorb axial expansions of the winding head. Simple and secure fastening is achieved by the bolts being fastened to the winding head rim in each case on a T-shaped hammer profile, which extends axially and is mounted, axially movable, in a T-shaped groove in the winding head rim, additional couplers are provided that transmit axial expansions of the winding head onto the hammer profile.02-14-2013
20130038166ROTATING ELECTRICAL MACHINE - A rotating electric machine includes a rotor, having a rotor laminate stack extending in the direction of a machine axis and having a rotor winding, the rotor winding forming a winding head at each of the ends of the rotor laminate stack, said winding head being fastened to a winding head rim, which is arranged concentrically within the winding head and adjoins the rotor laminate stack in the axial direction, in order to intercept centrifugal forces by means of bolts passing radially through the winding head, and a fastening designed to safely absorb axial expansions of the winding head. Simple and secure fastening is achieved by virtue of the bolts being fastened to the winding head rim in each case on a T-shaped hammer profile, which extends in the axial direction and is mounted in axially movable fashion in an associated axial T-shaped slot in the winding head rim.02-14-2013
20120223608WINDING OVERHANG SUPPORT OF AN ELECTRICAL MACHINE - The winding overhang of the rotor of an electrical machine is subject to strong centrifugal forces during operation, especially when the machines run at high speed. The winding overhang support prevents the production of relative movements between the winding overhang and the rotor base. These movements result in strong mechanical stresses on the winding bars. The winding overhang support includes an inner ring and an outer ring between which the winding bars are arranged in the region of the winding overhang, the outer ring being shrunk on the inner ring and both the outer ring and the inner ring being interspaced from the lamination stack.09-06-2012
20090236926Rotor for rotating electrical machine and method of manufacturing same - In a rotor for a rotating electrical machine, a flange of an insulating bobbin is formed with a first hook portion and a second hook portion. The first hook portion directs a lead of a field coil both against the winding direction of the field coil and radially inward. The first hook portion has a first groove in which is hooked a proximal portion of the lead. The second hook portion directs the lead axially outward. The second hook portion has a second groove which has an open end on a radially inner periphery of the second hook portion, a closed end positioned radially outward of the open end, and a neck between the open and closed ends. The second hook portion has an intermediate portion of the lead hooked in the second groove between the neck and closed end of the second groove.09-24-2009
20090278418BOBBIN FOR STATOR OF MOTOR - A bobbin includes a bobbin body, two top sidewalls, two bottom sidewalls, four top tabs and four bottom tabs. The bobbin body includes a top surface formed at one end of the bobbin body, a bottom surface formed at an opposite end of the bobbin body and a side surface located between the top surface and the bottom surface. The top sidewalls extend radially outward from the top surface of the bobbin body. The bottom sidewalls extend radially outward from the bottom surface of the bobbin body. The bottom sidewalls are staggered so that there is no overlap area between the top sidewall and the bottom sidewall along an axial direction of the bobbin body. Four top tabs extend away from the top surface at a position where there is no top sidewall. Four bottom tabs extend away from the bottom at a position where there is no bottom sidewall.11-12-2009
20100201218TERMINAL ELEMENT, MOTOR WINDING STRUCTURE AND METHOD FOR MANUFACTURING MOTOR WINDING STRUCTURE - A terminal element, a motor winding structure and a manufacturing method are disclosed. The terminal element includes a fixing portion, a positioning portion and a buffering portion. The fixing portion is disposed at one end of the terminal element and has a serrate fixing pattern. The fixing portion is connected with a connecting position of the motor winding bobbin. The positioning portion is disposed adjacent to the fixing portion and urged against the motor winding structure for positioning the fixing portion while it is connected with the connecting position. The buffering portion has a first bending and a second bending, and the first bending is connected to positioning portion. The buffering portion absorbs the force applied to the terminal element.08-12-2010
20080238239COIL MEMBER, MOTOR AND MANUFACTURING METHOD FOR COIL MEMBER - A coil member such as a coil bobbin may include a cylindrical drum part around which a coil is to be wound in a circular shape. The cylindrical drum part is formed by two molding dies and a flat face part is formed on an outer peripheral face of the cylindrical drum part so that a space part is formed between an innermost circumferential face of the coil to be wound and the flat face part. The flat face part is formed so that the two molding dies are separated without pressing the outer peripheral face of the cylindrical drum part, and a joining part on the drum part which is formed by the two molding dies is located on the flat face part. The coil member may be only a coil bobbin, a coil bobbin with a terminal part, or a coil bobbin which is integrated with a stator core.10-02-2008
20120068569Dynamoelectric machine - The invention relates to a dynamoelectric machine, comprising the following components or features: 03-22-2012
20130214634AUTOMOTIVE ROTARY ELECTRIC MACHINE AND STATOR MANUFACTURING METHOD THAT IS USED THEREFOR - The stator winding has winding assemblies that are disposed in a stator core so as to be stacked in three or more layers in a radial direction such that slot-housed portions line up in single columns in a clot depth direction inside slots, and radial widths of return portions of the winding assemblies that are mounted so as to be stacked in a radial direction are made sequentially narrower in order of return portions of a winding assembly that is positioned centrally, return portions of a winding assembly that is positioned on an inner circumferential side, and return portions of a winding assembly that is positioned on an outer circumferential side.08-22-2013
20090315425SUPERCONDUCTING COIL SUPPORT STRUCTURES - Support structures (12-24-2009
20090079288MOTOR WINDING BOBBIN AND TERMINAL STRUCTURE THEREOF - A motor winding bobbin and terminal structure there are disclosed. The terminal structure includes a fixing portion and at least one positioning portion. The fixing portion is disposed at one end of the terminal structure and has at least one fixing pattern. The fixing portion is connected with a connecting end of the motor winding structure. The positioning portion is disposed adjacent to the fixing portion and urged against the motor winding structure for positioning the fixing portion while it is connected with the connecting end.03-26-2009
20110127874ROTOR HAVING A SUPERCONDUCTING ROTOR WINDING AND AN INTEGRAL SLEEVE SURROUNDING THE ROTOR WINDING - A rotor for an electrical machine, in particular a synchronous machine has a rotor axis which defines a rotor shaft. The rotor has a winding support which is arranged on the rotor shaft such that they rotate together, in such a way that it surrounds the rotor shaft in a centre section with respect to the rotor axis. The winding support is fitted with a superconducting rotor winding. The rotor has a sleeve which at least radially surrounds the winding support and the rotor winding with respect to the rotor axis. At least in the area, in which it radially surrounds the winding support and the superconducting rotor winding, the sleeve is formed integrally from a metal alloy, which is non-magnetic, has an electrical conductivity of at least 60% of the electrical conductivity of copper at 20° C., has a mechanical tensile strength of at least 250 N/mm06-02-2011
20100320860CROWNED END WINDING SUPPORT FOR MAIN WOUND FIELD OF A GENERATOR - An end turn support for a generator includes a wire support. The wire support extends along an axis in a radial direction from an axis of rotation. The wire support defines an arcuate wire receipt surface.12-23-2010
20100320861DYNAMOELECTRIC MACHINE - An interfitting groove is disposed in a bottom portion of a trough portion so as to have a groove direction that is axial and so as to extend axially outward from axially inside, and a rotation arresting portion housing recess portion is recessed into an axially inner opening edge portion of the interfitting groove on a first yoke portion. A magnet holding seat that holds a permanent magnet is disposed in the trough portion by an interfitting portion being fitted into the interfitting groove such that radial movement is restricted. A rotation arresting portion that is disposed so as to project axially outward from a flange portion of the bobbin is housed inside a space that is constituted by the rotation arresting portion housing recess portion and an external shape reduced portion that extends axially inward from the interfitting groove such that rotation of the bobbin around the shaft is restricted.12-23-2010
20100133943TORQUE SUPPORT MEMBER FOR ROTATING ELECTRICAL MACHINE - A support module is provided for use in a rotor assembly of a rotating machine. The support module is disposed on the rotor body, supports high temperature superconductor rotor windings within the rotor assembly, and thermally decouples the cold portions of the rotor assembly, including windings and support tube, from the ambient temperature rotor body and drive shaft. The support module includes a frame disposed on the rotor body, a support block connected to the rotor winding and suspended within the frame, and thermally non-conductive straps extending from each of a pair of opposed sides of the support block to the frame, the straps suspending the support block within the frame.06-03-2010
20100164317AUTOMOTIVE ALTERNATING-CURRENT GENERATOR - An automotive generator that includes a Lundell rotor. First and second protruding portions are disposed so as to project from inner wall surfaces of portions of first and second yoke portions at root portions of first and second claw-shaped magnetic pole portions, and first and second recess portions are recessed into inner wall surfaces of portions of the first and second yoke portions that face the second and first protruding portions. In addition, a shape of a region in which the field coil is disposed is configured into a wave shape that has a cross-sectional shape in a plane that includes a central axis of the pole core that is approximately constant in a circumferential direction and that zigzags alternately in an axial direction at positions of each of the first and second claw-shaped magnetic pole portions.07-01-2010
20090026870FUSING STRUCTURE OF MOTOR - A fusing structure of a motor, includes a stator and a rotor, wherein the bus ring includes a ring portion and a fusing hook, and the bobbin includes a first engagement portion for changing a direction of an end portion of the wire extending from the coil so as to supply the coil with the power and a second engagement portion guiding the end portion of the wire and formed in a different length from that of the first engagement portion in the radial direction of the motor, the end portion of the wire is held between the first engagement portion and the second engagement portion so as to incline therebetween and held between the opposing surfaces so as to establish an electrical connection with the bus ring.01-29-2009
20120235532APPARATUS TO SUPPORT SUPERCONDUCTING WINDINGS IN A ROTOR OF AN ELECTROMOTIVE MACHINE - An apparatus (structure) is provided to support a superconductor winding (09-20-2012
20080224561Electric motor, method for manufacturing electric motor, electromagnetic coil for electric motor, electronic device, and fuel cell equipped apparatus - An electric motor having an electromagnetic coil, wherein the electromagnetic coil has wiring formed by a vapor deposited insulating layer wound on the entire exterior circumference of a conductive substrate.09-18-2008

Patent applications in class Field or excitation windings or structure

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