Class / Patent application number | Description | Number of patent applications / Date published |
310156070 | Additional flux directing magnets | 33 |
20080309188 | Electrical output generating devices and driven electrical devices with reduced flux leakage using permanent magnet components, and methods of making and using the same - A device for generating electrical or mechanical output, comprising a stator coil, a stator assembly, a rotor coil, a rotor assembly rotational about an axis, the rotor assembly at least partially surrounding the rotor coil, rotator extensions capable of induced magnetization and extending from the rotator, each rotator extension having a rotor extension surface, wherein magnetic flux leakage between the rotator extension surfaces is prevented or reduced via permanent magnet elements located at the rotator extension surfaces. Stator and rotor may be reversed in operation. | 12-18-2008 |
20090045688 | Permanent Magnet Machine - A permanent magnet electric machine with optimum motoring efficiency is disclosed. It is adapted for use in a hybrid electric vehicle powertrain. An asymmetric magnetic flux distribution pattern in the rotor of the machine is established to improve operating efficiency of the machine when it is in a motoring mode. | 02-19-2009 |
20090251021 | MOTOR AND MOTOR CONTROL DEVICE | 10-08-2009 |
20090273252 | MAGNETIC FIELD ELEMENT - A magnetic field element includes magnetic field portions and a coupling portion and is rotatable on a rotation axis along a given direction. Each magnetic field portion includes a magnet and magnetic plates. The magnet includes first and second pole faces having different polarities from each other in the given direction. The magnetic-material plates are provided on the first and second pole faces. The magnetic field portions are annularly arranged along a circumferential direction around the rotation axis and spaced in the circumferential direction from one another. The coupling portion is made of a non-magnetic material and couples the magnetic field portions to one another. | 11-05-2009 |
20100181858 | FLUX CONCENTRATOR FOR IRONLESS MOTORS - In one possible embodiment, a magnet array for a motor is provided which has an array of permanent magnets being arranged such that flux from the permanent magnets reinforce on one side of the array and substantially cancel on an opposite side of the array, the array further includes flux concentrators located at poles on the reinforcing side of the array. | 07-22-2010 |
20100314963 | PERMANENTLY EXCITED ELECTRICAL MACHINE - The invention relates to a permanently-excited electrical machine with a stator and a rotor. The stator has a coil arrangement and the rotor is provided with permanent magnet elements, or the rotor comprises a coil arrangement and the stator is provided with permanent magnet elements. An air gap is formed between the stator and the rotor, which is defined by the permanent magnet elements and magnetically conductive teeth of the stator, which are aligned with these in certain positions. The coil arrangement comprises at least one hollow cylindrical winding which is at least partially accommodated in the stator. The rotor has a magnetic return on the sides of the permanent magnet elements, which are remote from the air gap. The magnetic return is formed of rings which are oriented in the circumferential direction of the rotor, and which in the axial direction of the rotor are not wider than individual ones of the permanent magnet elements. Electrically/magnetically effective short-circuit coils are arranged between neighbouring permanent magnet elements in the axial direction of the electrical machine and/or neighbouring magnetic return rings in the axial direction. | 12-16-2010 |
20100320858 | AXIAL GAP TYPE MOTOR AND METHOD OF MANUFACTURING ROTOR OF MOTOR | 12-23-2010 |
20110285237 | AXIAL GAP MOTOR AND METHOD OF MANUFACTURING ROTOR FOR SAME - There are provided an axial gap motor which can reduce the number of manufacturing steps due to permanent magnets not having to be fixed by an adhesive and which can prevent permanent magnets from being displaced or loosened so that the permanent magnets can be positioned within a rotor frame in an ensured fashion and a manufacturing method for manufacturing a rotor for the motor. A rotor | 11-24-2011 |
20120200187 | ROTOR FOR ROTARY ELECTRIC MACHINE - A rotor for a rotary electric machine has a plurality of magnetic poles provided at intervals in a circumferential direction of a rotor core, at an outer periphery of the rotor core. Each of the magnetic poles includes a central magnet, a pair of circumferential-direction magnets disposed on both sides of the central magnet in the circumferential direction such that a spacing between the pair widens towards an outer periphery of the rotor core, and low permeability regions provided in the vicinity of end portions of the central magnet in the circumferential direction, and having a permeability lower than a magnetic material of the rotor core. The rotor core is formed such that a width of a magnetic path entrance portion that is formed between a magnetic-pole inward side face of the circumferential-direction magnet and the adjacent low permeability region decreases towards an outer peripheral face of the rotor core. | 08-09-2012 |
20120228976 | ROTOR-STATOR STRUCTURES INCLUDING BOOST MAGNET STRUCTURES FOR MAGNETIC REGIONS IN ROTOR ASSEMBLIES DISPOSED EXTERNAL TO BOUNDARIES OF CONICALLY-SHAPED SPACES - Various embodiments relate generally to electrodynamic machines and the like, and more particularly, to rotor assemblies and rotor-stator structures for electrodynamic machines, including, but not limited to, outer rotor assemblies. In some embodiments, a stator assembly including field pole members arranged about an axis of rotation and including pole faces at the ends of the field pole members, subsets of the pole faces being disposed within a boundaries of conically-shaped spaces having apexes disposed on the axis of rotation. The rotor assemblies include interior regions in which the subsets of the pole faces are disposed, the interior regions having surfaces external to the boundaries of the conically-shaped spaces. The rotor assemblies also include subsets of magnets interleaved circumferentially with the subsets of magnetically permeable structures and boost magnets disposed adjacent the subsets of magnetically permeable structures. Further, rotor assemblies include flux conductor shields disposed adjacent the boost magnets. | 09-13-2012 |
20120262019 | FLUX FOCUSING ARRANGEMENT FOR PERMANENT MAGNETS, METHODS OF FABRICATING SUCH ARRANGEMENTS, AND MACHINES INCLUDING SUCH ARRANGEMENTS - Numerous arrangements for permanent magnets are disclosed that can focus the flux produced by the magnets. Depending on the particular application in which the disclosed designs and techniques are used, efficiency and reliability may be increased by minimizing flux leakage, increasing peak flux density, and shaping the flux fields to improve the effective coercivity of the flux focusing permanent magnet arrangement when loaded, and to achieve customized voltage and current waveforms. The disclosed magnet assemblies may be incorporated into a machine, such as a motor/generator, having windings and may be disposed for movement relative to the windings. The magnet assembly may be mounted on a support formed of one or more ferromagnetic materials, such as a back iron The disclosed flux focusing magnet assemblies may be formed using a variety of manufacturing methods. | 10-18-2012 |
20120262020 | FLUX FOCUSING ARRANGEMENT FOR PERMANENT MAGNETS, METHODS OF FABRICATING SUCH ARRANGEMENTS, AND MACHINES INCLUDING SUCH ARRANGEMENTS - Numerous arrangements for permanent magnets are disclosed that can focus the flux produced by the magnets. Depending on the particular application in which the disclosed designs and techniques are used, efficiency and reliability may be increased by minimizing flux leakage, increasing peak flux density, and shaping the flux fields to improve the effective coercivity of the flux focusing permanent magnet arrangement when loaded, and to achieve customized voltage and current waveforms. The disclosed magnet assemblies may be incorporated into a machine, such as a motor/generator, having windings and may be disposed for movement relative to the windings. The magnet assembly may be mounted on a support formed of one or more ferromagnetic materials, such as a back iron The disclosed flux focusing magnet assemblies may be formed using a variety of manufacturing methods. | 10-18-2012 |
20120313473 | Synchronous permanent magnet machine - A synchronous permanent magnet machine includes a permanent magnet arrangement for producing a magnetic field having a flux density distribution that is approximately sinusoidal. The permanent magnet arrangement includes a permanent magnet pole with both low and high energy-product magnets. The permanent magnet pole includes a low energy-product magnet and a high energy-product magnet which have different directions of magnetization, or a disposition of low/high energy-product magnets within the permanent magnet pole is asymmetric with respect to the central region of the permanent magnet pole. | 12-13-2012 |
20130002078 | ROTOR OF A MULTIPOLAR SYNCHRONOUS ELECTRIC MACHINE WITH SALIENT POLES - A rotor of a multipolar synchronous electric machine, with salient poles, includes a plurality of salient poles and a source of magnetomotive force, distributed on each of the salient poles, configured to generate a magnetic flux configured to encompass the armature of a stator, a part of the magnetic flux generated by the source of magnetomotive force, designated leakage flux, being dispersed between the salient poles of the rotor; the rotor including a magnetic compensation source configured to compensate the leakages of magnetic flux dispersed between the salient poles, the compensation source being dimensioned so as to compensate at least a part of the leakage flux. | 01-03-2013 |
20130043754 | ROTOR AND ROTARY ELECTRIC MACHINE CONTAINING THE SAME - A rotor and a rotary electric machine containing the rotor are provided. The rotor includes a shaft, a rotor core coaxially connected to the shaft, at least one tangential magnetic steel, a first axial magnetic steel, and a second axial magnetic steel. The tangential magnetic steel is fixed in the rotor core along a tangential direction of the rotor core, and has first and second magnetic poles. The first axial magnetic steel disposed at one end surface of the rotor core is adjacent to the first pole, and has a third pole facing the rotor core, wherein the third pole and first pole repel each other. The second axial magnetic steel disposed at the end surface of the rotor core is adjacent to the second pole, and has a fourth pole facing the rotor core, wherein the fourth pole and the second pole repel each other. | 02-21-2013 |
20130057102 | ROTOR AND MOTOR - A rotor includes first and second rotor cores, a field magnet, interpole magnets and holding members. The first and second rotor cores each have claw-like magnetic poles arranged in the circumferential direction in an outer periphery of a core base at even intervals and formed to protrude radially outward. The field magnet is placed between the core bases in the axial direction of the rotor and magnetized in the axial direction to cause the magnetic poles of the first and second rotor cores to function as first and second magnetic poles, respectively. The interpole magnets are each arranged between a circumferentially adjacent pair of the magnetic poles and magnetized in the circumferential direction so as to have the same polarity as the magnetic poles, which are opposed thereto in the circumferential direction. The holding members hold the interpole magnets to restrict radially outward movement of the interpole magnets. | 03-07-2013 |
20130113323 | ROTOR AND MOTOR - A rotor having an axial direction includes at least a pair of rotor cores arranged in the axial direction, and a field magnet located between the rotor cores and magnetized in the axial direction. Each of the rotor cores includes a plurality of claw poles extending in the axial direction. Each of the rotor cores includes a magnetic flux controlling section, which appropriately causes a magnetic flux to flow to the claw poles. | 05-09-2013 |
20130214631 | FLUX FOCUSING ARRANGEMENT FOR PERMANENT MAGNETS, METHODS OF FABRICATING SUCH ARRANGEMENTS, AND MACHINES INCLUDING SUCH ARRANGEMENTS - Numerous arrangements for permanent magnets are disclosed that can focus the flux produced by the magnets. Depending on the particular application in which the disclosed designs and techniques are used, efficiency and reliability may be increased by minimizing flux leakage, increasing peak flux density, and shaping the flux fields to improve the effective coercivity of the flux focusing permanent magnet arrangement when loaded, and to achieve customized voltage and current waveforms. The disclosed magnet assemblies may be incorporated into a machine, such as a motor/generator, having windings and may be disposed for movement relative to the windings. The magnet assembly may be mounted on a support formed of one or more ferromagnetic materials, such as a back iron. The disclosed flux focusing magnet assemblies may be formed using a variety of manufacturing methods. | 08-22-2013 |
20130313932 | ROTOR AND MOTOR INCLUDING THE ROTOR - A rotor includes a rotor core, a plurality of embedded magnets that are fixedly embedded in the rotor core, and end magnets provided on respective axial sides of the rotor core. The end magnets are formed by magnetizing magnetic material such that magnetic poles of the end magnets are provided at such positions as to axially face magnetic path portions serving as magnetic paths for magnetic fluxes of the embedded magnets, the magnetic fluxes passing through an outer periphery of the rotor core and each magnetic pole of the end magnet has the same polarity as the polarity of the magnetic pole of the embedded magnets, which appears in a corresponding one of the magnetic path portions. | 11-28-2013 |
20140054998 | ROTOR AND ELECTRIC MOTOR INCLUDING THE SAME - A rotor and an electric motor including the rotor are provided. The electric motor includes a rotor and a plurality of stators. The rotor includes a plurality of main magnets that are disposed spaced apart from each other along a circumferential direction with respect to a rotation axis of the rotor, and have a magnetizing direction that is a direction of the rotation axis, a plurality of auxiliary magnetic units that are disposed on both sides of each of the main magnets in the direction of the rotation axis, and have a magnetizing direction that is the circumferential direction, so as to concentrate magnetic flux in each of the main magnets, and a plurality of webs that are disposed between the auxiliary magnetic units so as to generate a reluctance torque. | 02-27-2014 |
20140084731 | PERMANENT MAGNET TYPE ELECTRIC ROTATING MACHINE AND MANUFACTURING METHOD THEREOF - In a permanent magnet type electric rotating machine, a rotor is arranged in a Halbach array, a main magnet magnetized in the radial direction is formed of a rare-earth magnet and an auxiliary magnet magnetized in the circumferential direction is formed of a ferrite magnet, and a gap is provided between the main magnet and the auxiliary magnet; as a result, the quantity of utilized rare-earth magnets is reduced without the output torque of the electric rotating machine being decreased. | 03-27-2014 |
20140132102 | AXIAL FLUX HALBACH ROTOR - An axial flux Halbach rotor comprise: a first magnet set and a second magnet set. Further comprises: a plurality of first magnets that are respective featured by their respective first magnetizing directions and are arranged interconnecting to each other by the use of a first connecting element while allowing any two neighboring first magnets to be spaced from each other by a first distance; and the second magnet set further comprises: a plurality of second magnets that are respectively featured by their respective second magnetizing directions and are arranged interconnecting to each other by the use of a second connecting element while allowing any two neighboring second magnets to be spaced from each other by a second distance. In addition, the first magnet set and the second magnet set are arranged inlaid into each other while allowing the plural first magnets and the plural second magnets to be dispose alternatively. | 05-15-2014 |
20140167549 | MOTOR ROTOR AND MOTOR HAVING SAME - Disclosed is a motor rotor, comprising an iron core ( | 06-19-2014 |
20140210294 | ROTOR AND MOTOR - A rotor includes a circular rotor core, a plurality of θ magnets, and ring-shaped Z magnets. The rotor core has a plurality of magnet holding sections formed radially with a rotating shaft as the center. The θ magnets are contained in and held by the magnet holding sections such that the same magnetic poles of adjacent magnets face each other in a circumferential direction of the rotor core. The rotor core is such that N-poles and S-poles are alternately formed in a circumferential direction of an outer circumferential surface of the rotor core. The Z magnets are such that N-poles and S-poles are alternately formed circularly on an opposed face of the auxiliary magnet facing an end face of the rotor core in a direction of the rotating shaft. | 07-31-2014 |
20150028708 | MOTOR - A drive device driving a power converter that includes a switching element formed from a wide bandgap semiconductor, includes a PWM-signal output unit that generates a drive signal that drives the switching element with PWM; an on-speed reducing unit that, when the switching element is changed from off to on, reduces a change rate of the drive signal; and an off-speed improving unit that, when the switching element is changed from on to off, draws charge from the switching element at a high speed and with a charge drawing performance higher than that at a time when the switching element is changed from off to on. | 01-29-2015 |
20150048705 | MAGNETIC DRIVE DEVICES, AND RELATED SYSTEMS AND METHODS - A magnetic drive device may comprise a stator comprising a plurality of windings for generating a first number of magnetic pole pairs and a rotor comprising a plurality of permanent magnets for generating a second number of magnetic pole pairs that differs from the first number of magnetic pole pairs. The magnetic drive device may further comprise a plurality of free-spinning interpole elements disposed within an air gap between the stator and the rotor. The interpole elements may produce a magnetomotive force and harmonically couple the magnetic pole pairs of the stator with the magnet pole pairs of the rotor. | 02-19-2015 |
20150084466 | ROTOR AND MOTOR - A rotor includes first and second rotor cores, a disk magnet, and a rectifying magnet. The first and second rotor cores each include a core base and claw-poles. The disk magnet is magnetized in the axial direction so that the claw-poles of the first rotor core function as first poles and the claw-poles of the second rotor core function as second poles. The rectifying magnet includes at least an inter-pole magnet portion or a back-surface magnet portion. The inter-pole magnet portion is located in a gap formed in the circumferential direction between the claw-poles of the first rotor core and the claw-poles of the second rotor core. The back surface magnet portion is located in a gap formed at back surfaces of the claw-poles. The rectifying magnet and the disk magnet are formed from different materials. The rectifying magnet is integrated with the disk magnet in a post-process. | 03-26-2015 |
20150108865 | COMPOSITE TORQUE ROTATING ELECTRIC MACHINE - A composite torque rotating electric machine includes a stator having armature windings arranged at multiple positions in a circumferential direction, a rotor having a cylindrical core, first permanent magnets arranged on axes (d) and in the circumferential direction on the outer periphery of the rotor, second permanent magnets arranged on axes (d) on the inner periphery side of the rotor across from the permanent magnets on the outer circumference side, third permanent magnets on axes (q) and extending in the longitudinally and radially of the rotor, and air gaps on the outer periphery side of the third permanent magnets and intermediate in the circumferential direction of the first permanent magnets. The radial distance between the first and second magnets is greater than the circumferential distance between the first permanent magnets and the air gaps. A rectifier having multiple slits is disposed between the first permanent magnets and the air gaps. | 04-23-2015 |
20150115758 | Permanent Magnet Rotating Electrical Machine and a Motor Vehicle Using Same - A permanent magnet rotating electrical machine includes a rotor which has permanent magnets buried in a plurality of permanent magnet insertion slots that are provided in a rotor core, and the rotor is rotatably supported by a rotary shaft with a gap on the inner peripheral side of a stator. When the axis of magnetic flux for the permanent magnet is set as a d-axis and the position deviated from the d-axis by electrical angle of 90° is set as a q-axis, the permanent magnet insertion slot is located on the q-axis and a first permanent magnet magnetized in the direction orthogonal to the q-axis is buried in the permanent magnet insertion slot. The permanent magnet insertion slot is located on the d-axis and a second permanent magnet magnetized in the direction parallel to the d-axis is buried in the permanent magnet insertion slot, while at least one or more third permanent magnets buried in the permanent magnet insertion slots are provided between the first permanent magnet and the second permanent magnet. Thereby, the environmental load discharged from a motor vehicle is reduced. | 04-30-2015 |
20150295457 | ROTOR AND MOTOR - A rotor includes first and second rotor cores, a field magnet, and an annular magnet. The first and second rotor cores each include a core base and core magnetic poles. The core magnetic poles are provided on an outer peripheral portion of the core base at equal intervals. The core bases are faced with each other. The core magnetic poles are alternately arranged in a peripheral direction. The annular magnet is a resin molding product including a magnetic pole magnet portion and an inter-pole magnet portion. The annular magnet has a non-contact portion not in contact with the first and second rotor cores. A gate mark portion in injection molding of the annular magnet is arranged in the non-contact portion. | 10-15-2015 |
20150357870 | ROTOR AND ROTARY ELECTRIC MACHINE THAT INCLUDES THAT ROTOR - Permanent magnets that form individual magnetic poles are configured by arranging three magnet blocks to be spaced apart from each other circumferentially, the three magnet blocks are each formed such that cross-sectional shapes that are perpendicular to a central axis of a rotor core are radially outwardly convex, and circumferential widths are narrower in magnet blocks that are further away from a magnetic pole center, and the three magnet blocks that are arranged circumferentially are formed to have mirror symmetry relative to a plane that passes through the magnetic pole center and the central axis of the rotor core. | 12-10-2015 |
20150372578 | MOTOR - A rotating portion of a motor includes magnets and a rotor core that holds the magnets in holding holes. Each of the magnets includes a first magnet element and two second magnet elements. The two second magnet elements are located on opposite circumferential sides of the first magnet element, and a coercivity of the two second magnet elements is smaller than the first magnet element. The rotor core includes a flux barrier including a void located on a radially inner side of the first magnet elements. A width of the magnets in a direction perpendicular or substantially perpendicular to a radial direction passing through a center of the corresponding first magnet element is larger than a width in the same direction of the corresponding flux barrier within a plane perpendicular or substantially perpendicular to the center axis. | 12-24-2015 |
20190149000 | ROTOR AND ROTARY ELECTRIC MACHINE | 05-16-2019 |