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| Number | Title | Issue Date |
| 8179010 | Permanent magnet type rotor having improved magnet fixing A rotor is provided. The rotor includes a rotor iron core including slots formed around an outer circumferential portion thereof; magnet pieces which are inserted into the slots, respectively, such that a magnetic orientation of the magnet pieces are inverted every ... | 05/15/2012 |
| 8174158 | Methods and apparatus for a permanent magnet machine with asymmetrical rotor magnets In general, the various embodiments are directed to a permanent magnet machine (“PM machine”), and more specifically an internal permanent magnet machine (“IPM machine”) that includes rotor magnets configured asymmetrically with respect to the rotor peripher... | 05/08/2012 |
| 8169117 | Brushless motor for fluid pump and fluid pump using the motor The present invention provides a brushless motor for a fluid pump that allows implementing a fluid pump that overcomes problems of durability and reduction of energy efficiency due to DC motors in the related art and provides excellent operational characteristics, b... | 05/01/2012 |
| 8138650 | Rotor core having bridges connection magnetic pole and method of manufacturing the same A rotor core of a rotating electrical machine formed by stacking a plurality of blanks blanked from a steel sheet, the blank having a yoke, a magnetic pole portion confronting the yoke, and a magnet insertion hole positioned between the yoke and the magnetic pole po... | 03/20/2012 |
| 8138651 | Methods and apparatus for a permanent magnet machine with an added air barrier An internal permanent magnet machine (“IPM machine”) of the type used, for example, with traction motors and hybrid electric vehicles, includes a rotor with an additional air barrier provided above the first magnet barrier in the same rotor slot. Each magnet onl... | 03/20/2012 |
| 8120223 | Permanent magnet machine with offset pole spacing An internal permanent magnet machine has multiple rotor sections, each section having multiple rotor laminations. Permanent magnets are placed asymmetrically in lamination openings to attenuate oscillations in torque caused by harmonic components of magnetic flux. | 02/21/2012 |
| 8106557 | Permanent magnet synchronous motor and hermetic compressor It is an objective to provide a permanent magnet synchronous motor that is highly efficient with low vibration and low noise. A stator 30 includes a stator core 1 that includes magnetic pole teeth 2 each formed between adjacent slots 3, a... | 01/31/2012 |
| 8102091 | Interior permanent magnet motor including rotor with unequal poles An electric machine includes a stator and a rotor core including a first rotor portion positioned adjacent the stator and having an outside diameter. The first rotor portion includes a plurality of elongated slots that define a plurality of poles. The electric machi... | 01/24/2012 |
| 8089190 | Rotor for an interior permanent magnet synchronous motor The present invention provides a rotor for an interior permanent magnet synchronous motor for driving an air blower, in which the structure of the rotor is suitably modified to reduce magnetic flux leakage and, at the same time, maximize saliency ratio, thus improvi... | 01/03/2012 |
| 8072110 | Motor and compressor Two magnets in a circumferential direction of a rotor are provided in each slot of the rotor. The two magnets are consistently pulled in a direction in which they are mutually separated by magnetism of a stator and fixed on inner surfaces on both sides of the slot i... | 12/06/2011 |
| 8067872 | Permanent magnet rotor having slanted or curved grooves The invention relates to a permanent magnet rotor for an electric motor, in which the permanent magnets inside the rotor extend parallel to the rotation axis of the rotor, and in the area of the radially outer longitudinal edges of the permanent magnets, grooves tha... | 11/29/2011 |
| 8030817 | Rotor of permanent-magnet-type rotating electrical machine A rotor of a permanent-magnet-type rotating electrical machine of the present invention has a plurality of magnetic poles in point symmetry with respect to a rotation center of a rotor core 2. For each of the magnetic poles, there are arranged a permanent mag... | 10/04/2011 |
| 8026648 | Electric machine An electric machine, especially a brushless DC motor. Said electric machine comprises a rotor and a stator which is provided with current-carrying coils. Said rotor, in the circumferential direction, is provided with a plurality of permanent magnets that are embedde... | 09/27/2011 |
| 8018109 | Permanent magnet machine with offset pole spacing An internal permanent magnet machine has multiple rotor sections, each section having multiple rotor laminations. Permanent magnets are placed asymmetrically in lamination openings to attenuate oscillations in torque caused by harmonic components of magnetic flux. | 09/13/2011 |
| 8008825 | Electromagnetic steel plate forming member, electromagnetic steel plate laminator, permanent magnet type synchronous rotating electric machine rotor provided with the same, permanent magnet type synchronous rotating electric machine, and vehicle, elevator, fluid machine, and processing machine using the rotating electric machine An electromagnetic steel plate forming member provides the two magnet holes for inserting therein the two permanent magnets per pole along the V-shape, which are provided in the region of the radial pole pitch lines OP provided in the rotor core at the predetermined... | 08/30/2011 |
| 7973442 | Permanent magnet-type rotary electric machine and production method for rotor for permanent magnet-type rotary electric machine A production method for a rotor for a permanent magnet-type rotary electric machine, includes the step (S01, S02) of forming a magnet piece that has a plurality of groove portions that are provided on at least one of end surfaces of the magnet piece in... | 07/05/2011 |
| 7960885 | Rotor and method of manufacturing the rotor and electric vehicle A rotor includes: a rotor core formed by stacking a first sheet member and a second sheet member and having a first magnet-inserted hole and a second magnet-inserted hole located radially outward relative to the first magnet-inserted hole; magnets inserted respectiv... | 06/14/2011 |
| 7956506 | Driving apparatus A rotating electric machine comprises a stator having stator salient poles, three-phases windings would around said stator salient poles, a rotor rotatable held inside the said stator, and permanent magnets inserted into said rotor and positioned opposite to said st... | 06/07/2011 |
| 7948138 | Rotor A rotor is provided with a rotor core, a magnet inserted into the rotor core and a filling portion arranged in a space between the rotor core and the magnet. The space between the rotor core and a radially outer side surface of the magnet has a uniform width in a ce... | 05/24/2011 |
| 7948137 | Core, rotor, motor and compressor A rotor includes a core extending in a predetermined direction, and a plurality of magnets. The core has parts formed by magnetic materials and extending in the predetermined direction. The parts are arranged in a loop around the part, and face the part through gaps... | 05/24/2011 |
| 7939985 | Motor and method for manufacturing rotor unit of the motor In a rotor unit of a motor, field magnets are inserted into respective magnet holding holes of a rotor core. End plates are arranged on the upper and lower end surfaces of the rotor core to cover the magnets holding holes. Each of the end plates preferably has three... | 05/10/2011 |
| 7919897 | Axial gap type motor An axial gap type motor 10 includes: a rotor 11 having a rotor core 13, the rotor core 13 including: multiple main magnet pieces 41 respectively magnetized in a direction of the rotation axis O of the rotor, and multiple main magne... | 04/05/2011 |
| 7902711 | Methods and apparatus for a permanent magnet machine with segmented ferrite magnets An internal permanent magnet machine (“IPM machine”) of the type used, for example, with traction motors and hybrid electric vehicles, includes a rotor having a plurality of equal-sized (e.g., rectilinear) segmented ferrite magnets arranged in one or more layers... | 03/08/2011 |
| 7902710 | Electric machine An electric machine includes a rotor having at least one pole pair, the at least one pole pair including a first magnetic pole and a second magnetic pole having opposite polarities. The first magnetic pole may include a first inner radial permanent-magnet layer and ... | 03/08/2011 |
| 7893591 | Laminated rotor core and method for manufacturing the same A stamping step of forming a plurality of band-shaped core sheets (11), (12) having arc-shaped segment core sheets (15), (15a), the adjacent segment core sheets (15), (15a) connected together by narrow-width co... | 02/22/2011 |
| 7880358 | 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... | 02/01/2011 |
| 7876014 | Permanent magnet rotor with increased magnetic flux Disclosed is a rotor of a generator or motor having an auxiliary coil provided around a rotor body, thereby preventing the distortion of output voltage waveforms according to the variation of load, and thereby allowing the fine adjustment of the output voltages of t... | 01/25/2011 |
| 7868501 | Rotor for an electric motor, rotor discs for construction of the rotor, and an electric motor having such a rotor Annular rotor disc for, in an axially stacked disc assembly of a plurality of similar rotor discs, forming a rotor for an electric motor, in which the discs secure a plurality of axially running permanent bar magnets, of substantially rectangular cross-sectional sha... | 01/11/2011 |
| 7859141 | Electrical machine and use thereof The invention relates to an electrical machine of the transversal-flux type. The machine comprises a stator and a movable element. The stator has a plurality of stator elements with magnetic flux conductors and an electric winding extending in a closed winding path ... | 12/28/2010 |
| 7851958 | Electric machine with interior permanent magnets An electric machine is disclosed herein comprising a stator and a rotor opposing the stator. A plurality of slots are formed in the rotor, each of the plurality of slots including a stator side and an opposing side. Each of the plurality of slots further include a c... | 12/14/2010 |
| 7843100 | Methods and apparatus for preventing demagnetization in interior permanent magnet machines An internal permanent magnet machine (“IPM machine”) of the type used, for example, with traction motors and hybrid electric vehicles, includes a rotor having a plurality of ferrite magnets arranged in one or more layers, wherein at least one of the layers inclu... | 11/30/2010 |
| 7834505 | Rotary device of generator or motor Disclosed is a rotary device of a generator or motor which includes: a stator having a hollow portion formed at the inside thereof and a plurality of slots formed to wind coils therearound, each of the plurality of slots being skewed at a predetermined angle; a roto... | 11/16/2010 |
| 7808147 | Rotor for permanent magnet motor A rotor (3) for a permanent magnet motor has a is rotatable around an axis of rotation (A) and has a plurality of axially extending permanent magnets (6) which are offset circumferentially in a symmetrical manner and arranged, respectively, in receptac... | 10/05/2010 |
| 7808144 | Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine A magnetic gap is provided between a permanent magnet of a rotor and an auxiliary magnet pole portion which is arranged adjacent to the permanent magnet in a peripheral direction. A gradual change in a magnetic flux density distribution of a surface of the rotor is ... | 10/05/2010 |
| 7808143 | Permanent magnet motor A permanent magnet motor includes stator, rotor, and shaft; multiple rotor magnetic poles are disposed on the rotor; each rotor magnetic pole contains an arc surface and a first inclined section and a second inclined section extending respectively from both sides of... | 10/05/2010 |
| 7800271 | Sintered magnet and rotating machine equipped with the same The sintered magnet and the rotating machine equipped with the same are disclosed. The sintered magnet includes crystal grains of a ferromagnetic material consisting mainly of iron, and a fluoride compound or oxyfluoride compound layer containing at least one elemen... | 09/21/2010 |
| 7777382 | Motor A motor includes a rotor core, permanent magnets and non-magnetic layers. The permanent magnets are embedded in the rotor core with each of the permanent magnets defining a pole of the rotor having a pole center and a peripheral edge section, with the peripheral edg... | 08/17/2010 |
| 7772734 | Rotor structure of rotating electric machine A rotor includes a rotor core and disk-shaped end plates provided to sandwich the rotor core in the direction of a rotation shaft. The end plates are each formed to have one end face relatively closer to the rotor core and larger in outer diameter with the center at... | 08/10/2010 |
| 7768171 | 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... | 08/03/2010 |
| 7755243 | Rotating electric machine A rotating electric motor includes a rotary shaft capable of rotation, a stator core formed in a cylindrical configuration, a rotor core fixed to the rotary shaft, a magnet set at the rotor core such that a pair of magnetic poles of different magnetism are aligned i... | 07/13/2010 |
