| Entries |
| Document | Title | Date |
|---|
| 20080197736 | Magnet retention system for permanent magnet motors and generators - A rotor for a brushless permanent magnet generator/motor comprises a retention slot extending into a rotor flange for receiving a root of a permanent magnet. The retention slot comprises a base extending axially into the rotor flange, a pair of side walls extending radially from the base, and a pair of lugs projecting from the side wall to engage the root to provide radial and tangential retention of the permanent magnet. In other embodiments, the permanent magnet is further restrained in the axial direction by a spring pre-loaded axial retention ring. | 08-21-2008 |
| 20080197737 | PERMANENT MAGNET ROTOR ASSEMBLY - An illustrative embodiment of the present invention is concerned with a permanent magnet rotor for an electric machine provided with an internal stator and a coaxial external rotor. To overcome the drawbacks associated with the use of an adhesive to mount the permanent magnets to the rotor body, permanent magnet spacing and retaining elements are mounted to the inner surface of the rotor, between adjacent magnets. | 08-21-2008 |
| 20080252165 | Rotor for permanent magnet motor | 10-16-2008 |
| 20080278017 | Rotor of Permanent Magnet Rotating Electric Machine - A permanent magnet rotating electric machine has a stator provided with a plurality of windings, and a rotor in which magnets are disposed in slots formed in a rotor core along an outer circumference thereof. The rotor core is fixed on a rotary shaft rotating inside the stator, and one magnetic pole is constituted by each group of three or more of the magnets. A total angle occupied by the group of magnets constituting one magnetic pole is in the range of 150 to 165 degrees in terms of an electrical angle. | 11-13-2008 |
| 20090001836 | Spindle Motor - A spindle motor is provided. The spindle motor comprises a bearing housing, a bearing, a rotating shaft, a stator around, a rotor, and a first magnet. The bearing is fixed inside the bearing housing. The rotating shaft is rotatably inserted into the bearing. The stator surrounds the bearing housing. The rotor is fixed to the rotating shaft to rotate by interaction thereof with the stator. The first magnet surrounds the rotating shaft to attract the rotating shaft in one side direction. | 01-01-2009 |
| 20090015090 | PERMANENT MAGNET ROTATING ELECTRICAL MACHINE AND PERMANENT MAGNET ROTATING ELECTRICAL MACHINE SYSTEM - Movement of magnets due to centrifugal force is restricted. In a permanent magnet rotating electrical machine | 01-15-2009 |
| 20090066180 | ROTOR FOR MAGNETIC MOTOR - Rotor formed by groups of materials ( | 03-12-2009 |
| 20090096308 | Rotor For Electric Motor - An electric motor has an internal ferromagnetic rotor ring and an external stator. Circumferentially distributed cutouts in the rotor receive rectangular permanent magnets each having a width b and height h and the rotor ring is divided into rotor poles. The height h forms the longer side of each magnet and is radial to the motor axis. The magnets are magnetized in the width b direction with like poles oriented toward one another. A magnetic clearance is located between adjacent magnets for each inner portion of a rotor pole. The clearance does not contain magnetic material and in a center region of the rotor poles one support web connects an inner support ring with the particular rotor pole to provide mechanical support. | 04-16-2009 |
| 20090278415 | CORELESS MOTOR HAVING ROTORS ARRANGED CONCENTRICALLY AND DRIVING APPARATUS HAVING THE MOTOR - The present invention relates to a coreless motor including a multi-stage rotor and a driving apparatus having the motor. More particularly, the present invention relates to a coreless motor including magnets and coils arranged, in multiple stages, to be concentric with a rotary central shaft and a driving apparatus having the a motor. According to an aspect of the present invention, a coreless motor including a multi-stage rotor comprises a rotor and a stator. The rotor includes a plurality of cylindrical yokes arranged in multiple stages in a radial direction, and a plurality of magnets fixed to the yokes in the respective stages in such a manner that polarities of the magnets fixed to the yoke in each stage are changed in a circumferential direction of the yoke. Further, the stator includes a plurality of cylindrical armature coil assemblies arranged in multiple stages to face the yokes, and each armature coil assembly includes a plurality of armature coils. The armature coils can be rigidly fixed using an epoxy resin to maintain their rigidity. Thus, the motor can produce power in a highly efficient way since it includes the multi-stage rotor and stator. Further, since the motor does not include a core, no cogging torque is produced to prevent the reduction of output torque and the output torque is kept constant to suppress noise and vibration. | 11-12-2009 |
| 20100026123 | PERMANENT-MAGNET (PM) ROTORS AND SYSTEMS - Permanent-magnet (PM) rotors, rotor components, and machines using PM rotors. | 02-04-2010 |
| 20100052454 | Actuating Device for a Motorized Wheeled Vehicle with an Electric Generating Function - An actuating device for a motorized bicycle includes a fixed unit and a rotation unit. The fixed unit includes a mandrel and a plurality of coils. The rotation unit includes a rotation member and a plurality of magnets. Each of the magnets is inclined relative to a respective one of the coils so that each of the magnets is closer to any two adjacent coils to promote the magnetic interaction between each of the magnets and any two adjacent coils so as to enhance the rotation efficiency of the rotation unit. When the bicycle is padelled by a rider or traveled on a downward slope, the actuating device has a generating function to produce an electric current so as to replenish the electric power of the bicycle. | 03-04-2010 |
| 20100052455 | Permanent-Magnet (PM) Rotors and Systems - Permanent-magnet (PM) rotors, rotor components, and machines using PM rotors, where the PM rotors have internally coupled PM bulks and/or are configured to have a non-uniform air gap between the rotor and a stator. | 03-04-2010 |
| 20100141074 | Permanent Magnet Rotor With Projections For Fixing The Permanent Magnets Of The Rotor Packet - The invention relates to a permanent magnet rotor that comprises a rotor shaft, a rotor packet that is secured to the rotor shaft and that has a radially inner area and a radially outer area, receiving pockets provided in the rotor packet between its radially inner area and its radially outer area and permanent magnets that are positioned in the receiving pockets. Recesses are provided in the radially inner area of the rotor packet. The permanent magnets are fixed in the associated receiving pocket by means of a projection of the partial area of the inner area that lies between the respective recess and the respective receiving pocket. | 06-10-2010 |
| 20100207475 | ROTOR OF PERMANENT MAGNET ROTARY MACHINE AND MANUFACTURING METHOD OF ROTOR - A rotor of a rotary machine includes a rotary shaft, a rotor core fixed to a circumferential surface of the rotary shaft, a plurality of permanent magnets arranged on a circumferential surface of the rotor core at specific intervals along a circumferential direction thereof, conducting circuits arranged to surround the permanent magnets, and magnetic material pieces arranged on outer surfaces of the individual permanent magnets. Each of the conducting circuits includes a pair of first conductor sections arranged between magnetic poles formed by the adjacent permanent magnets and a pair of second conductor sections electrically connecting the first conductor sections. | 08-19-2010 |
| 20100308677 | ROTOR SPINDLE STRUCTURE - A rotor spindle structure including a spindle with a predetermined length and a coupling section integrally formed on the spindle. The coupling section has an extension portion radially outward extending from a circumference of the spindle by a predetermined length. The coupling section further has an annular coupling face formed on a rim of the extension portion. The coupling face is parallel to the axis of the spindle and the center of curvature of the coupling face coincides with the axis of the spindle. | 12-09-2010 |
| 20110057530 | Vacuum mechanical rotation-transmitting apparatus - A vacuum mechanical rotation-transmitting apparatus is disposed on a hollow member that defines a vacuum chamber. The apparatus includes an input shaft assembly, an outer shaft assembly extending into the input shaft assembly and the vacuum chamber, a spacer member disposed between the input and output shaft assemblies, a plurality of first magnetic units disposed on the input shaft assembly, and a plurality of second magnetic units disposed on the output shaft assembly. A magnetic attractive force is produced between the first and second magnetic units to allow for co-rotation of the output shaft assembly with the input shaft assembly. | 03-10-2011 |
| 20110095637 | ROTOR FOR A ROTARY ELECTRIC MACHINE COMPRISING A MAGNET ELEMENT BETWEEN TWO ADJACENT TEETH | 04-28-2011 |
| 20110241467 | PERMANENT MAGNET MOTOR - A permanent magnet motor is provided. The permanent magnet motor includes: a stator including a stator core, and an insulator for insulating the stator core from the wire; and a rotor in which a rotating shaft is attached to a center of the rotor and a permanent magnet is provided in an outer peripheral portion of the rotor. The stator core includes an annular yoke portion, a plurality of teeth extended radially from an inner periphery of the yoke portion, and a plurality of slots for accommodating a wire to be wound around the teeth at both ends in a circumferential direction of the teeth. A number of the slots in the stator core is set to be | 10-06-2011 |
| 20110248592 | Synchronous Machine - The invention relates to a rotor for an electric machine, comprising a base body and a plurality of support bodies that are fixed on the base body and support permanent magnets. The rotor is characterized in that two first support bodies that are located at a distance from one another form a receiving region for a second support body, allowing the first support body to be positively connected to the second support body. | 10-13-2011 |
| 20120068567 | POLYPHASIC AXIAL ELECTRIC CURRENT GENERATOR WITH PIVOTING MAGNETS - A motor or generator has a design that allows resistive magnetic forces that restrict the movement of the rotor to be diminished, thus increasing efficiency. A pivoting rotor design allows magnets on the rotor to break the magnetic field first in the center of the rotor due to the attraction of other magnets. The generator or motor includes a drive shaft, and at least one generator or motor stage including two stators interleaved with one rotor having a plurality of pivoting frames each including at least one magnet. | 03-22-2012 |
| 20120175987 | BRUSHLESS MOTOR - A brushless motor including a stator having teeth and a rotor having magnetic pole portions is disclosed. The magnetic pole portions are arranged to have the same polarities as each other. The rotor includes gaps that function as magnetic resistance at circumferential ends of each of the magnetic pole portions so that an iron core portion is formed between the circumferentially adjacent magnetic pole portions. Magnetic flux of the magnetic pole portions passes through the iron core portion along the radial direction. The gaps include a first gap located on the leading end of the magnetic pole portion in the rotation direction of the rotor and a second gap located on the trailing end of the magnetic pole portion in the rotation direction of the rotor. The circumferential width of the first gap is set to be greater than the circumferential width of the second gap. | 07-12-2012 |
| 20120206007 | ROTOR CORE FOR ROTATING ELECTRICAL MACHINE, AND MANUFACTURING METHOD THEREOF - A cylindrical rotor core | 08-16-2012 |
| 20120262021 | COMPACT HIGH POWER ALTERNATOR - An apparatus for converting between mechanical and electrical energy, particularly suited for use as a compact high power alternator for automotive use and “remove and replace” retrofitting of existing vehicles. The apparatus comprises a rotor with permanent magnets, a stator with a winding, and a cooling system. Mechanisms to prevent the rotor magnets from clashing with the stator by minimizing rotor displacement, and absorbing unacceptable rotor displacement are disclosed. The cooling system directs coolant flow into thermal contact with at least one of the winding and magnets, and includes at least one passageway through the stator core. Various open and closed cooling systems are described. Cooling is facilitated by, for example, loosely wrapping the winding end turns, use of an asynchronous airflow source, and/or directing coolant through conduits extending through the stator into thermal contact with the windings. | 10-18-2012 |
| 20120274167 | BRUSHLESS DC MOTOR HAVING SLOTLESS STATOR - The present invention relates to a brushless DC motor having a slotless stator, more particularly to a brushless DC motor having a slotless stator in that a plurality of coil winding protrusion portions capable of winding coils in a bobbin is separated from each other at regular intervals along an outer circumference surface of a body portion, so that it can wind the plurality of the coils in the longitudinal direction of a shaft, thereby supplying the DC motor of the high power; and the bobbin is made of an insulating material, so that the rotation of the rotor is not disturbed. | 11-01-2012 |
| 20130009504 | CLAW ROTOR EQUIPPED WITH AN INSULATOR FOR AN EXCITATION COIL AND MAGNETS, AND ROTARY ELECTRICAL MACHINE EQUIPPED WITH A CLAW ROTOR - The claw rotor ( | 01-10-2013 |
| 20130009505 | ROTARY ELECTRIC MACHINE - A rotary electric machine includes a stator; and a rotor including an iron core, which has a tubular connecting portion surrounding a shaft and 10 magnetic pole portions integrally formed with the connecting portion corresponding to a pole number, and a plurality of permanent magnets arranged between the magnetic pole portions. The iron core includes axially-penetrated magnet accommodating air gaps formed between the magnetic pole portions at the radial outer side of the connecting portion, and the permanent magnets are installed in the respective magnet accommodating air gaps such that a radial outer surface of each of the permanent magnets makes close contact with an inner surface of each of the magnet accommodating air gaps and such that a gap exists between a radial inner surface of each of the permanent magnets and the connecting portion. | 01-10-2013 |
| 20130026871 | ELECTRICAL MACHINE - In one embodiment, an apparatus includes a rotor shaft, at least one pole segment, at least one pole tip segment and at least one permanent magnet pair. The at least one pole segment is mechanically coupled to the rotor shaft. Each permanent magnet pair is disposed between the at least one pole segment and respective pole tip segment. The apparatus further includes at least one mechanical member that mechanically restrains the at least one pole tip segment to at least one of the rotor shaft or the at least one pole segment. | 01-31-2013 |
| 20130026872 | ROTOR OF AN ELECTRIC MACHINE WITH EMBEDDED PERMANENT MAGNETS AND ELECTRIC MACHINE - A rotor for an electric machine excited by magnetic poles formed by one or more embedded permanent magnets includes a magnetic body and the one or more embedded permanent magnets associated with the magnetic body defining first magnetic poles and second magnetic poles of alternating magnetic polarity along a rotor direction. For at least one of the one or more embedded permanent magnets a rotor segment is arranged between the one or more embedded permanent magnets and a first surface of the magnetic body. At least one retainer element connects the rotor segment to a portion of the magnetic body. | 01-31-2013 |
| 20130069467 | AXIAL FLUX ELECTRIC MACHINE AND METHODS OF ASSEMBLING THE SAME - An electric machine is described. The electric machine includes a rotor comprising a rotor disk and a plurality of permanent magnets magnetically coupled to the rotor disk. The plurality of permanent magnets include a substantially flat profile and are aligned in a substantially planar array. The electric machine also includes a stator comprising a solid stator core and a plurality of coils each wound around a coil insulating member. The stator core includes a plurality of stator teeth extending substantially parallel to an axis of rotation of the rotor. | 03-21-2013 |
| 20130127282 | METHOD OF RESIN SEALING PERMANENT MAGNET AND LAMINATED CORE MANUFACTURED BY THE METHOD - A method of resin sealing a permanent magnet in a magnet insertion portion of a laminated body, the body formed by laminating plural core sheets and including the plural portions formed around a shaft hole in a center thereof, the portion connected to an internal space via an opening. The method includes a first process of positioning a blocking member blocking the opening from a side of the space in a way that the member is vertically-placed in a lower die or an upper die, while the both dies hold the body from both sides in an axial direction and close the portion; and a second process of filling a resin extruded from a resin reservoir portion provided in the die or the die into the portion having the magnet inserted therein and having the opening closed by the member. | 05-23-2013 |
| 20130134816 | ROTOR FOR MOTOR AND METHOD FOR MANUFACTURING THE SAME - Non-holding portions of a holding ring are demagnetized by supplying a nonmagnetic element to the non-holding portions while melting the non-holding portions by the application of heat. Each non-holding portion is demagnetized such that, from the melting center toward each melting end portion thereof, the material of the non-holding portion moderately changes from a nonmagnetic material to a ferromagnetic material. The permeability moderately changes, and hence generation of cogging torque during rotation of a rotor is suppressed. | 05-30-2013 |
| 20130134817 | ROTOR FOR MOTOR AND METHOD OF MANUFACTURING THE SAME - At least part of each bridge portion is heated and molten to form a keyhole, and a nonmagnetic element is disposed around the keyhole. Thus, even when the width of the bridge portion in the radial direction is increased, the bridge portion is demagnetized. Therefore, leakage flux in the bridge portion is reduced, and the output power of a motor is increased. Moreover, by increasing the width of the bridge portion in the radial direction, the strength of the bridge portion is increased, and breakage of the bridge portion due to a centrifugal force at high-speed rotation of a rotor is prevented. | 05-30-2013 |
| 20130140933 | BRUSHLESS MOTOR - Disclosed herein is a brushless motor includes a rotor rotating about a rotation axis and having a rotor core and a plurality of magnets, and a stator disposed around the rotor, wherein the magnets are arranged to be equally spaced and embedded in an outer circumferential portion of the rotor core, and the rotor core includes a pair of slits symmetrically disposed about the reference line, wherein when a portion of the magnet between the center point and each of the edges is divided into eleven portions by parting lines parallel to the reference line, an inner end of the slit is positioned outside a parting line set as an eighth parting line when the parting lines are arranged in order from a side of the reference line toward the edge. | 06-06-2013 |
| 20130169097 | LOW AXIAL FORCE PERMANENT MAGNET MACHINE - An electric machine includes a plurality of teeth separated by a plurality of slots positioned on an armature of the electric machine. Each of the teeth may include at least one bifurcation. A plurality of magnets may be arranged on a main field of the electric machine to form an axial array group. The magnets in the axial array group may be arranged in the main field with respect to each other to create a multi-stepped arrangement having a predetermined step angle. The step angle is determined based on the positioning of the bifurcations and the slots. | 07-04-2013 |
| 20130169098 | MULTI-GRADE MAGNET FOR AN ELECTRIC MACHINE - Apparatus and methods for improved performance of electric machines, including internal permanent magnet electric machines. In some embodiments there are multiple pairs of permanent magnets. Each magnet is fabricated from a pair of materials, one of the materials being selected to have improved high temperature magnetic characteristics, and the second material, in some embodiments, being selected for having improved magnet characteristics at lower temperatures even if with lesser magnetic characteristics at the higher temperatures than the other material. | 07-04-2013 |
| 20130181564 | ROTOR AND MOTOR - Magnets may be embedded in first recessed portions of a rotor core, and at least one stopper is each attached to an axial end of the rotor core. The rotor core may include second recessed portions each including a locking portion arranged to project inward therein. The stopper may include a base portion arranged to close the first recessed portions, and elastically deformable hook portions each arranged to be inserted into a separate one of the second recessed portions to be engaged with the locking portion. The rotor core may include first plates and second plates placed upon one another. Each first plate may include first locking elements each defining an opening, while each second plate may include second locking elements each defining a larger opening. The locking portions may be defined by arranging the second plates axially inward and placing the first plates upon the second plates. | 07-18-2013 |
| 20130187505 | ROTOR HAVING DIVIDABLE CORE FOR ELECTRIC MOTOR AND PRODUCTION METHOD THEREOF - A rotor having a dividable core for an electric motor, and a production method thereof. A rotor has a generally annular supporting member; a plurality of shaft portions positioned on the supporting member in a circumferential direction at regular intervals, the shaft portions extending generally parallel to a rotation axis of the rotor; and a plurality of divided cores each having a hole portion which is fitted to each shaft portion. By annularly connecting the divided cores, a generally annular dividable core for the rotor is formed. Each divided core has connecting portions at both circumferential ends thereof, and each connecting portion is configured to be connected to a connecting portion of a neighboring divided core while the divided core is fitted to the shaft portion. | 07-25-2013 |
| 20130257210 | ELECTRIC MOTOR AND ELECTRIC COMPRESSOR USING THE SAME - Provided is an electric motor in which magnets are reduced in size, thus achieving a reduction in cost, and in which a magnetic torque and a reluctance torque are effectively used by adjusting the magnetic flux density to improve the efficiency, thus achieving a reduction in size and cost. The electric motor is equipped with a rotor that includes a cylindrical rotor iron core in which main magnetic poles and auxiliary magnetic poles are alternately disposed in the circumferential direction, a substantially V-shaped magnet insertion hole that is provided for each of the main magnetic poles and whose convex portion faces a rotor center and is centered on a d-axis passing through the rotor center and the circumference-wise center of the main magnetic pole, and two magnets per pole that are embedded in the magnet insertion hole in a substantially V-shaped manner. | 10-03-2013 |
| 20130270953 | MAGNET COVER PLATE MODULE FOR WIND TURBINE GENERATORS, ARRANGEMENT, MOUNTING AND DISMOUNTING METHOD THEREOF - The present invention describes a magnet cover plate module for positioning and protecting permanent magnets individually on a rotor's yoke for wind turbine generators. Said magnet module comprising a magnet cover plate made of a soft magnetic material for covering said permanent magnets individually, a non-magnetic plate is permanently fixed to said magnet cover plate, said non-magnetic plate comprises means for fixing said magnet cover plate module to an outer surface of said rotor's yoke, said fixing means being removable so as to allow mounting and dismounting of said cover plate module individually. Additionally a magnetic extender configured for guiding magnetic flux and avoid flux leakage is arranged on an inner surface of the rotor's yoke. Related methods of mounting, dismounting and repairing permanent magnets are equally described. | 10-17-2013 |
| 20130270954 | ROTOR FOR AN ELECTRICAL MACHINE - A rotor for an electrical machine has a rotor body and permanent magnets arranged on the circumference of the rotor body, wherein those areas of the circumference of the rotor body which are covered by the permanent magnets have at least one recess and/or that side of the permanent magnets which faces the circumference of the rotor body has at least one recess. Each recess is configured as a slot which extends in parallel relationship to a circumference-proximal side of the permanent magnets. Removably insertable in the recesses are ferromagnetic bars to allow removal of the permanent magnets. | 10-17-2013 |
| 20130293052 | MAGNET RETENTION ON ROTORS - A rotor magnet retention device comprises a retainer body and a fastening device. The retainer body includes a bottom region, at least two angled side regions extending from the bottom region, and at least one opening extending through a bottom surface of the retainer body. The fastening device extends through the opening at a bottom surface of the retainer body to a rotor to flexibly position the retainer body relative to the rotor. A first angled side surface conformably communicates with a first magnet coupled to the rotor and a second angled side surface conformably communicates with a second magnet coupled to the rotor. | 11-07-2013 |
| 20130300242 | ROTOR AND MOTOR - A rotor with a first rotor core, a second rotor core, a field magnet, and an interpole magnet is provided. The first rotor core has a first core base and a plurality of first nail-shaped magnetic pole parts that extend in the axis direction from the outer circumference section of the first core base. The second rotor core has a second core base and a plurality of second nail-shaped magnetic pole parts that extend in the axis direction from the outer circumference section of the second core base. The field magnet is magnetized along the axis direction and makes the first nail-shaped magnetic parts function as first magnetic poles and the second nail-shaped magnetic parts function as second magnetic poles. The interpole magnet is arranged between the first nail-shaped magnetic parts and the second nail-shaped magnetic parts. The interpole magnet has the same polarity as the first and second nail-shaped magnetic pole parts, in the sections where same face the first and second nail-shaped magnetic pole parts. | 11-14-2013 |
| 20140001908 | PERMANENT-MAGNET TYPE ROTATING ELECTRICAL MACHINE | 01-02-2014 |
| 20140028138 | METHOD FOR ASSEMBLING AN ELECTRICAL MACHINE - In a method an inner segment is first pre-assembled on each of a number of outer segments by at least one fixing element, so as to produce a plurality of segment modules having each a predetermined air gap between the inner segment and the outer segment. The inner segments and the outer segments are assigned to the rotor or stator of the electrical machine. The inner segments of the plurality of segment modules are fastened to an inner assembly device (for example a hub). The outer segments of the plurality of segment modules are fastened to an outer assembly device (for example a supporting structure). Finally, the fixing elements between the inner segments and the outer segments are removed. | 01-30-2014 |
| 20140042854 | ROTOR - A laminated core of a rotor includes an inner core portion and a plurality of outer core portions. The inner core portion axially extends in a cylindrical shape in a region located more radially inward than magnets. The outer core portions are arranged in a circumferential direction in a region located more radially outward than the inner core portion. The plurality of outer core portions and a plurality of the magnets are alternately arranged in the circumferential direction. Accordingly, magnetic flux generated from a pair of magnetic pole surfaces of the plurality of magnets can be effectively used. In addition, the laminated core includes caulking portions in each of the inner core portion and the plurality of outer core portions. Accordingly, a plurality of thin plate cores are firmly fixed. | 02-13-2014 |
| 20140062243 | INTERNAL ROTOR MOTOR - An internal rotor motor, in particular an electronically commutated internal rotor motor, has a multi-pole stator ( | 03-06-2014 |
| 20140084732 | ROTOR AND ELECTRIC ROTATING MACHINE - A rotor is provided which includes a first rotor portion, a second rotor portion which is arranged at a position deviated from the first rotor portion by a predetermined skew angle so as to contact the first rotor portion, first magnets each of which is provided in a magnetic pole of the first rotor portion, and second magnets each of which is provided in a magnetic pole of the second rotor portion and is arranged at a position deviated from the first magnet of the first rotor portion by the predetermined skew angle. Coercive field strengths of the first magnets and coercive field strengths of the second magnets are different from each other. | 03-27-2014 |
| 20140097718 | BRUSHLESS MOTOR - Disclosed is a magnetic flux concentrated-type brushless motor performing field weakening control and reducing iron loss. The teeth of the stator are provided with a stator-side wide-width portion, and the rotor is provided with magnetic members having a rotor-side wide-width portion, and magnets disposed between the magnetic members. The motor is driven for a certain time in a low rate of rotation (LRR) section and a high rate of rotation (HRR) section. Field weakening control is performed in the HRR section. When the number of pairs of opposite poles of the rotor is P, a length of a radial line of the rotor-side wide-width portion R, a thickness of the stator-side wide-width portion Lt, a central angle of the stator-side wide-width portion τt, a central angle the rotor-side wide-width portion τr, and a central angle between any two neighboring magnets τM, the motor is set such that τr≦2.85×τm−2.65×τt and (Lt×P)/(ττ×R)≧τt/τm−0.6. | 04-10-2014 |
| 20140103768 | RADIALLY EMBEDDED PERMANENT MAGNET ROTOR AND METHODS THEREOF - In one embodiment, a permanent magnet rotor is provided. The permanent magnet rotor includes at least one permanent magnet and a substantially cylindrical rotor core including an outer edge and an inner edge defining a central opening. The rotor core includes a radius R, at least one pole, and at least one radial aperture extending radially though the rotor core from the outer edge to a predetermined depth less than the radius. The at least one radial aperture is configured to receive the at least one permanent magnet. The rotor further includes at least one protrusion extending into the at least one radial aperture, the at least one protrusion positioned substantially along a bottom of the at least one radial aperture and configured to facilitate retention of the at least one permanent magnet within the at least one radial aperture. | 04-17-2014 |
| 20140111050 | IPM ROTOR MAGNET SLOT GEOMETRY FOR IMPROVED HEAT TRANSFER - A rotor includes a stack of metal laminations each having a plurality of magnet slots, corresponding magnet slots of the laminations being substantially aligned with one another and thereby forming longitudinal channels in the rotor, selected ones of the magnet slots having at least one feature protruding from at least one long side thereof. The rotor also includes a plurality of magnets each having a pair of long sides in cross-section, each magnet being disposed in a respective one of the longitudinal channels, and includes a thermal conductor connecting at least one of the long sides of one of the magnets with an adjacent long side of a magnet slot having the at least one feature. The feature abuts a long side of a respective one of the magnets at a distance away from the long side of the respective magnet slot. | 04-24-2014 |
| 20140132103 | MOTOR AND INSPECTION METHOD THEREFOR - A motor may include a rotor having a rotation shaft made of metal and a cylindrical permanent magnet fixed to the rotation shaft, and a stator facing a peripheral face of the permanent magnet and is electrically insulated from the rotation shaft. The peripheral face of the permanent magnet facing the stator and the rotation shaft are electrically connected with each other. | 05-15-2014 |
| 20140152136 | DEVICES AND METHODS FOR MAGNETIC POLE RETENTION IN ELECTROMAGNETIC MACHINES - In some embodiments, an electromagnetic machine includes a rotor element configured for movement relative to a stator. The rotor element includes a magnetic support, a magnetic pole assembly, and a retainer. The magnetic support is formed, at least in part, from a ferromagnetic material and is configured to be coupled to the magnetic support. The retainer is coupled to both the magnetic support and the magnetic pole assembly. The retainer is further configured to be in a first state during a first time period and a second state during a second time period, after the first time period, such that during the second time period, the coupling of the magnetic pole assembly to the magnetic support is maintained. | 06-05-2014 |
| 20140175929 | Rotor Structure for a Motor - A rotor structure for a motor includes a shaft, a single magnet and two fixing seats. The single magnet has two opposite end faces. An axial hole has a maximum extent equal to a maximum extent between the two opposite end faces. At least one of the two opposite end faces has a first engaging member. The magnet and each opposite end face have a maximum radial extent. Each fixing seat includes an abutting face having a maximum radial extent the same as the maximum radial extent of the single magnet and of the opposite end faces. One of the abutting faces has a second engaging member. The first engaging member is located at the maximum radial extent at the outer edge of the at least one of the two opposite end faces, or located at the inner edge of the at least one of the two opposite end faces. | 06-26-2014 |
| 20140191607 | MOTOR ROTOR AND MOTOR HAVING SAME - Disclosed is a motor rotor, comprising an iron core ( | 07-10-2014 |
| 20140252902 | Binkowski Electrical Machine - An electrical machine includes at least one magnet that provides a dipole magnetic field having a primary direction. A plurality of elongate conductive members is spaced from one another in a plane perpendicular to this primary direction. The members extend radially away from a central axis parallel to this primary direction. The magnet(s) or the plurality of members is coupled to a shaft that rotates about the central axis whereby the members interact with the magnetic field during such rotation. At least one electrical circuit provides for electric current flow through the members during such rotation. In a generator mode, the shaft is driven by an external source, and the electrical circuit produces current flow during shaft rotation. In a motor mode, an external source supplies current flow through the circuit, which causes interaction between the members and the magnetic field produced by the magnet to rotate the shaft. | 09-11-2014 |
| 20150048706 | ELECTRIC MOTOR HAVING STRUCTURE FOR REDUCING COGGING TORQUE - A synchronous electric motor having a structure for reducing cogging torque generated by the positioning error of a permanent magnet. Protrusions are alternately arranged in regions A and B in the circumferential direction of an iron core. Therefore, with respect to neighboring magnets positioned on both sides of the first protrusion, in region B, where the protrusion does not exit, ends of the neighboring magnets are attracted to each other by magnetic force. On the other hand, with respect to the neighboring magnets positioned on both sides of the second protrusion, in region A, where the protrusion does not exit, ends of the neighboring magnets are attracted to each other by magnetic force resulting in being inclined in opposing directions, and thus the generated cogging torque is significantly reduced. | 02-19-2015 |
| 20150061443 | ROTOR AND ROTARY ELECTRIC MACHINE HAVING THE SAME - A rotor has a projection part projected from an inner wall of a central hole part toward a central axis and a rib part defined between opening parts adjacent with each other in a circumferential direction. A first imaginary straight line is defined to extend from the central axis outward in a radial direction through a center of the projection part. The projection part is formed so that the first imaginary straight line passes the opening part. A second imaginary straight line is defined to extend from the central axis outward in the radial direction through a center of the rib part. The rib part is formed so that the second imaginary straight line passes a center of a pole part or an intermediate position between pole parts adjacent with each other in the circumferential direction. | 03-05-2015 |
| 20150102694 | ROTOR STRUCTURE OF ELECTRIC MOTOR, AND METHOD FOR MANUFACTURING THE SAME - A rotor for preventing breakaway includes a shaft, a rotor core configured to be coupled to the shaft, and multiple permanent magnets configured to be inserted into the rotor core, wherein a cylindrical metallic ring is inserted and fixed on an outer surface of the rotor core. | 04-16-2015 |
| 20150108866 | ROTOR ASSEMBLY FOR ELECTRIC MACHINE HAVING MECHANICAL RETENTION SYSTEM FOR MAGNETS - A rotor assembly for an electric machine includes a plurality of lamination sheets. Each of the lamination sheets defines an aperture. The lamination sheets are disposed adjacent each other to define a laminated stack. The apertures are aligned with each other to define a slot extending parallel with a central axis of the laminated stack. A magnet is disposed within the slot. The lamination sheets include a group of recess lamination sheets and a tab lamination sheet. The tab lamination sheet includes a tab that extends into the slot, and into abutting engagement with the magnet to bias the magnet against a wall of the slot. The apertures of the group of recess lamination sheets include a groove portion that defines a groove. The tab of the tab lamination sheet is at least partially disposed within the groove defined by the recess lamination sheets. | 04-23-2015 |
| 20150115759 | Rotor Support and Method for Producing a Rotor Support - A rotor arm for an electrical machine includes a support pot for mounting a magnetic element. The support pot has a hub bearing a drive shaft. An inner peripheral surface of the rotor arm has, in an axial direction from the hub, an end stop for a supporting element of the rotor arm for the further bearing of the drive shaft. | 04-30-2015 |
| 20150145366 | ROTOR HAVING RESIN HOLES FOR FILLING RESIN AND METHOD OF PRODUCING A ROTOR - A rotor which can raise the axial direction strength near the end edges outside of the rotor core in the radial direction. The rotor comprises a shaft, a rotor core which has a plurality of magnetic steel sheets and is fastened to the shaft, and a plurality of magnets which are arranged inside of the rotor core. The rotor core has a center hole which holds the shaft, a plurality of magnet holes which are arranged at the outside of the center hole in the radial direction and hold magnets, resin holes which are arranged at the outsides of the magnet holes in the radial direction and which run through the rotor core in the axial direction, and rotor core fastening members which include first resin parts which are filled inside the resin holes. | 05-28-2015 |
| 20150145367 | PERMANENT MAGNET ROTOR - A rotor for a brushless motor includes a shaft, a rotor core and a number of permanent magnets. The rotor core includes inner and outer annular portions. The inner annular portion has a central hole for receiving the shaft. The outer annular portion includes a number of sector segments arranged in a ring, with adjacent sector segments defining a slot there between for receiving a corresponding permanent magnet. Radially outer ends of adjacent sector segments are interconnected by a connector. The sector segments include first sector segments and second sector segments arranged alternately. The first sector segments are separated from the inner annular portion. The second sector segments are each connected to the inner annular portion by connecting arms. | 05-28-2015 |
| 20150380994 | ROTATING ELECTRIC MACHINE - A rotating electric machine including: -a magnetic mass, in particular rotoric, including first housings, -a plurality of permanent magnets inserted into the first housings, each permanent magnet having two polar faces, and -nonmagnetic shims inserted into the first housings and/or into second housings formed in the magnetic mass, -the shims being configured to cause a deformation of the first housings reducing the parasitic air gap between at least a polar face of a permanent magnet and the corresponding wall of a first housing. | 12-31-2015 |
| 20150380997 | Electric Motor and Method for Manufacturing Same - The present invention includes a rotor with rotor sectors arranged around a center along the peripheral direction and a bridge between adjacent rotor sectors for connecting the adjacent rotor sectors, so that when inserting a shaft in the center of the rotor, it can be readily and firmly connected thereto by thermal and pressed insertion, and in the rotor having core plates laid on one another, a skew structure may be readily attained by connecting the core plates laid sequentially shifted by a given angle in one direction to the shaft. | 12-31-2015 |
| 20160013687 | ELECTRICAL CORE ELEMENT FOR A GENERATOR | 01-14-2016 |
| 20160013709 | LAMINATED ROTOR CORE AND METHOD FOR MANUFACTURING THE SAME | 01-14-2016 |
| 20160028278 | AN INTERIOR PERMANENT MAGNET MOTOR, AND COMPRESSOR - Provided is an interior permanent magnet motor, including: a plurality of permanent magnets respectively inserted into a plurality of magnet accommodating holes formed in a rotator core of a rotator. In the magnet accommodating hole, a pair of minute projecting portions, a pair of large projecting portions, and a pair of demagnetizing field recesses are formed. The permanent magnet is sandwiched by a corresponding pair of minute projecting portions. The minute projecting portion is protruded radially inward to be in surface-contact with a corresponding end surface of the permanent magnet. The large projecting portion is formed on an outer side of the minute projecting portion, and is extended to an inner defining line side of the magnet accommodating hole. A height dimension (Ta) of the large projecting portion is larger than a height dimension (Tb) of the minute projecting portion. | 01-28-2016 |
| 20160043599 | OUTER ROTOR TYPE DYNAMO - An outer rotor type dynamo has a first magnet and a second magnet which are disposed apart from each other in the axial direction, a first stator yoke disposed facing the inside of the first magnet with a gap, a second stator yoke disposed faced the inside of the second magnet with a gap, a hub shaft which magnetically connects the first stator yoke and the second stator yoke, a comb-like yoke in which both end portions of a plurality of projection pieces extending along the axial direction face different magnetic poles with respect to the first magnet and the second magnet, a bobbin disposed between the first stator yoke and the second stator yoke, and a coil wound around the bobbin. | 02-11-2016 |
| 20160043601 | PERMANENT-MAGNET AC POWER GENERATOR - The present invention relates to a plurality windings of U phase corresponding to one magnetic pole including first and second windings wound in a short pitch winding manner. The winding starts of the first and second windings are shifted by at least one tooth. The windings are wound so that a winding angle occupied by the windings inter-slot angle from the winding start of the first winding to the winding end of the second winding corresponds to a pole angle. The windings in the V phase are disposed in the same relationship as in the U phase at the position delayed by an electric angle of 120 degrees with respect to the U phase, and those in the W phase are disposed at the position delayed by an additional 120 degrees. The outputs of the windings are then each rectified, subsequently joined together and used by adding currents. | 02-11-2016 |
| 20160043619 | DOUBLE-STATOR ROTATING ELECTRIC MACHINE - A double-stator rotating electric machine includes a rotor, an outer stator disposed radially outside the rotor with an outer gap formed therebetween, and an inner stator disposed radially inside the rotor with an inner gap formed therebetween. The outer stator has an outer multi-phase coil wound thereon, and the inner stator has an inner multi-phase coil wound thereon. Moreover, the inner gap formed between the inner stator and the rotor is set to be larger than the outer gap formed between the outer stator and the rotor. | 02-11-2016 |
| 20160056670 | System and Method for Generating Electric Energy and Torque using an Improved Magnet Positioning to Produce a Counter-Magnetic Field - This disclosure relates to a system and method for improvising motor efficiency using an improved magnet positioning and by applying an inductive load. A magnetic induction rotor assembly can comprise a core, a rotary device, a first winding, a second winding, and a magnet. The core can comprise a closed loop and two or more winding supports. The winding supports can be mounted to the inner portion of the closed loop. Each of the winding supports can comprise an orifice. The rotary device can comprise a rotor and a rod. The rod can pass between the winding supports. The first winding can be around a first side of one of the winding supports. The second winding can be on a second side of the other winding supports. The magnet can be mounted to the rod. The magnet can be within the orifices. | 02-25-2016 |
| 20160065016 | PERMANENTLY-EXCITED DYNAMOELECTRIC MACHINE - A permanently-excited dynamoelectric machine includes a stator and a rotor supported for rotation about an axis. The stator has a winding system, which is embedded in grooves of a material forming a magnetic return path and interacts electromagnetically with permanent magnets of the rotor via an air gap between the stator and the rotor. The permanent magnets are disposed on the rotor, with each individual permanent magnet, on a side facing towards the air gap, having a North and South pole. The rotor, viewed in the circumferential direction, has a pole coverage by the permanent magnets of 100%, i.e. that the permanent magnets viewed in the circumferential direction, are arranged substantially without gaps. | 03-03-2016 |
| 20160065018 | ROTARY ELECTRICAL MACHINE HAVING PERMANENT MAGNET ROTOR - A rotary electrical machine capable of preventing an increase in a magnetic flux density at both ends of a rotor that can occur due to a leakage flux to thereby prevent a local overheat of the rotor is disclosed. The rotary electrical machine includes: a rotor having a rotor core and permanent magnets disposed on an outer surface of the rotor core; a stator having windings arranged around the rotor; and a shaft which is rotatable together with the rotor. The rotor core is a solid rotor core having a solid structure, the rotor core has protrusions at both sides of each of the permanent magnets, and annular recesses, extending in a circumferential direction of the rotor, are formed on outer surfaces of the protrusions, respectively. | 03-03-2016 |
| 20160065020 | Axial-Type Rotary Electric Machine - An axial-type rotary electric machine that improves a torque and an efficiency relative to a size of a rotor is provided. The axial-type rotary electric machine is provided with a stator having a stator core, and a rotor facing the stator along an axial direction of a rotation axis passing through the stator. The rotor includes a permanent magnet arranged so as to face the stator core in the axial direction of the rotation axis, a yoke arranged so as to face the stator core across the permanent magnet, and a support member supporting the yoke. The support member includes a protrusion protruding so as to face a side surface of the permanent magnet that is on the farther side to the rotation axis. In projection along the axial direction of the rotation axis, a first region where a projecting portion of the permanent magnet does not overlap a projecting portion of the yoke is formed in the permanent magnet, and the first region is formed on the outer-diameter side of the permanent magnet and the first region is formed on a side of the protrusion. | 03-03-2016 |
| 20160072347 | Permanent Magnet Electric Motor - In a permanent magnet electric motor, a plurality of projections are formed at least partially along an axial direction in the magnet insertion openings, the projection positioning both edges of the permanent magnet in the circumferential direction so that vacant spaces are defined at each sides of the permanent magnet in the circumferential direction; a plurality of slits arranged along the circumferential direction are provided in regions, the region being positioned radially outward from the permanent magnet and being sandwiched at the edges of the permanent magnet in the circumferential direction by the projections; and the shortest distance between the slit and the magnet insertion opening is set to be greater than the shortest distance between the slit and an outer circumferential surface of the rotor core. | 03-10-2016 |
| 20160094099 | ELECTRIC FLUID PUMP WITH IMPROVED ROTOR UNIT, ROTOR UNIT THEREFOR AND METHODS OF CONSTRUCTION THEREOF - An electric fluid pump, rotor unit therefore, and methods of constructions thereof are provided. The fluid pump includes a stator unit configured to generate a magnetic field in response to a control signal. A rotor unit is received within the stator unit, wherein the rotor unit is configured to rotate about a central rotor axis in response to the magnetic field generated by the stator unit. The rotor unit includes a plurality of magnets contained in through openings of a carrier assembly having first and second carrier members, wherein the first and second carrier members are fixed to one another by bond joints. | 03-31-2016 |
| 20160111925 | RADIALLY EMBEDDED PERMANENT MAGNET ROTOR AND METHODS THEREOF - In one embodiment, a permanent magnet rotor is provided. The permanent magnet rotor includes at least one permanent magnet and a substantially cylindrical rotor core including an outer edge and an inner edge defining a central opening. The rotor core includes a radius R, at least one pole, and at least one radial aperture extending radially though the rotor core from the outer edge to a predetermined depth less than the radius. The at least one radial aperture is configured to receive the at least one permanent magnet. The rotor further includes at least one protrusion extending into the at least one radial aperture, the at least one protrusion positioned substantially along a bottom of the at least one radial aperture and configured to facilitate retention of the at least one permanent magnet within the at least one radial aperture. | 04-21-2016 |
| 20160126793 | Structure for Preventing Scattering of Magnet and Retaining Magnet for Rotating Electrical Machine - In a rotating electrical machine, in the case where a cylindrical component is fixed by press fitting or the like, the opening edge of the cylindrical component is widened toward the end to provide peeps for facilitating the insertion of the cylindrical component. However, the outer shape of a rotor expands due to the peeps, and a gap needs to be provided between the rotor and a stator in consideration of the expanded portion of the outer shape, which causes the degradation of the performance of the rotating electrical machine. In addition, in the case where magnets are fixed only by the tightening force of a magnet cover, the greater the centrifugal force becomes, the larger the clamping margin becomes and similarly the larger the peeps become, and thus the expanded portion also becomes larger. However, if the opening edge is not widened to the end, the absence of the peeps makes it difficult to insert the magnet cover. The purpose of the present invention is to solve such a problem and to allow the magnets to be fixed with the magnet cover without degrading the performance of the rotating electrical machine. Cutout portions are provided at the opening edge of the magnet cover, and the cutout portions at the opening edge of the magnet cover are bent toward the internal diameter after being press fitted in order to fix the magnets. | 05-05-2016 |
| 20160156234 | ELECTRICAL MACHINE | 06-02-2016 |
| 20160163434 | R-T-B BASED SINTERED MAGNET AND MOTOR - The present invention provides an R-T-B based sintered magnet having excellent corrosion resistance together with good magnetic properties. The R-T-B based sintered magnet contains R | 06-09-2016 |
| 20160164354 | Electric Machine with Q-Offset Grooved Interior-Magnet Rotor and Vehicle - A rotating electric machine includes a stator having a stator coil and a rotor provided rotatably around a specific rotation axis with respect to the stator. The rotor includes a plurality of magnets, a plurality of magnetically-assisted salient pole members provided between poles of any adjacent two magnets from among the plurality of magnets, and a magnetoresistance variation unit provided in the magnetically-assisted salient pole member along an axial direction of the rotation axis at a position offset in a circumferential direction of the rotation axis from a q-axis passing through a salient pole center of the magnetically-assisted salient pole member. The amount of offset of the magnetoresistance variation unit from the q-axis varies depending on positions of the magnetically-assisted salient pole members so that torque fluctuations cancel each other when power is applied. | 06-09-2016 |
| 20160181877 | EMBEDDED PERMANENT MAGNET TYPE ELECTRIC MOTOR, COMPRESSOR, AND REFRIGERATION AIR-CONDITIONING DEVICE | 06-23-2016 |
| 20160190880 | MOTOR WITH PERMANENT MAGNET EMBEDDED THEREIN, AND COMPRESSOR - An interior permanent magnet motor includes: a rotator; a stator; a permanent magnet inserted into a magnet accommodating hole; and a slit formed on a radially outer side of the magnet accommodating hole. A space portion is ensured between a radially outer surface of the permanent magnet and a rotator core in each region opposed to the slit. The permanent magnet is apart from the rotator core via the space portion in the each region opposed to the slit. | 06-30-2016 |
| 20160197541 | BRUSHLESS MOTOR | 07-07-2016 |
| 20160254725 | GENERATOR ASSEMBLY AND BEARING EQUIPPED WITH THE SAME | 09-01-2016 |
