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| Number | Title | Issue Date |
| 7417347 | Skeleton type BLDC motor A rotor of a BLDC motor includes: a rotor divided into a north pole and a south pole on the basis of a magnetic pole separating line; and a stator at which the rotor is disposed with an air gap, the stator having a first pole shoe, a second pole shoe and a pair of d... | 08/26/2008 |
| 7332840 | Fan motor with IC retention means A fan motor includes a printed circuit board (200), an IC (100) and an insulating frame (50) mounted on the printed circuit board. The insulating frame includes an annular main body (44) with a number of arms (11) extending radiall... | 02/19/2008 |
| 7268513 | Motor/generator unit A motor/generator unit in which a motor/generator and an invertor part are integrated and the wiring of a field circuit part for supplying current to a winding on a rotor is rationalized. In a motor/generator unit in which a motor/generator body part having a field ... | 09/11/2007 |
| 7102263 | Permanent magnet type rotor and permanent magnet type rotary electrical machine A number of embodiments of rotating electrical machines using permanent magnets wherein the cogging torque is substantially reduced as are vibrations caused by magnetic flux variations. This is accomplished by disposing the coil windings in equal circumferential spa... | 09/05/2006 |
| 7053514 | Image apparatus and drive motor A drive motor is proposed, which serves as a drive source for a movement mechanism constituting an iris for an optical path of an imaging system. The drive motor has a shaft serving as a center of rotation, a magnet, two-pole magnetized and rotated around the shaft,... | 05/30/2006 |
| 7036205 | Method of manufacturing stator for brushless motors A plurality of motors are assembled. A plurality of part-sized stators are provided. Each of the part-sized stators is a split portion of a full-sized stator which has been previously split. The full-sized stator includes a printed circuit board with a plurality of ... | 05/02/2006 |
| 6979927 | Automotive alternating-current dynamoelectric machine Slots are formed at a nonuniform pitch at a ratio of two slots per phase per pole. An X-phase winding phase portion constituting a stator winding is constructed by connecting in series an a-phase winding phase sub-portion and a d-phase winding phase sub-portion havi... | 12/27/2005 |
| 6933818 | Torque motors A torque motor may include a rotor having at least two magnets disposed thereon, and a stator having a core and at least one coil. The magnets are arranged and constructed so that the outer surfaces thereof alternately have a N pole and a S pole. The magnets cover t... | 08/23/2005 |
| 6879079 | Permanent magnet rotor electrical synchronous machine with different alternatively arranged tooth pitch widths In order to achieve high machine utilization with the magnetic fields having an approximately sinusoidal profile, an electrical synchronous machine is proposed having the following features: a stator and a rotor with the stator hav... | 04/12/2005 |
| 6838799 | Liquid cooled DC motor apparatus A DC motor apparatus includes a motor housing assembly which includes an outer liquid-tight coolant chamber and an inner, armature-reception chamber portion. Pairs of permanent magnet stator magnet modules are housed within the liquid-tight coolant chamber, and shun... | 01/04/2005 |
| 6812600 | Motor for use with thin type inner rotor and disk apparatus A motor having a rotor with a plurality of magnetic poles arranged in an arch or circular shape and a stator in which coils are disposed on the magnetic teeth of a stator core having a plurality of the magnetic teeth disposed opposite to the rotor, wherein a magneti... | 11/02/2004 |
| 6809456 | Vector motor A motor employing vector motion principles to Convert magnetic forces into rotary motion has a rotor with a shaft and a plurality of magnets connected to the shaft by bent supports having a particular bend angle. The rotor is positioned within a stator having a plur... | 10/26/2004 |
| 6777844 | Brushless motor A vacuum cleaner assembly includes a motor having a rotor and a stator for providing motive power to the assembly. The rotor and stator each include armatures having tips. In one aspect, the widths of the rotor and stator tips are different. In another aspect, the r... | 08/17/2004 |
| 6700280 | Drive unit with an electric machine A drive unit with a drive and an electric machine, the drive being equipped with a drive shaft and the electric machine with a stator and a rotor. The rotor is coaxial to the stator and connected to the drive shaft for the transmission of torque, where th... | 03/02/2004 |
| 6504285 | Vector motor A motor employing vector motion principles to convert magnetic forces into rotary motion has a rotor with a shaft and a plurality of magnets connected to the shaft by bent supports having a particular bend angle. The rotor is positioned within a stator ha... | 01/07/2003 |
| 6288471 | Alternator having a starter with non-uniformly pitched slots An alternator includes a stator having a stator core formed with a number of slots extending longitudinally on an inner circumference thereof, and two sets of three-phase stator coils installed in the slots, and a rotor rotably disposed inside the stator,... | 09/11/2001 |
| 6286199 | Method for assembly of motor with external rotor A method for assembling an inside out motor includes the step of stacking a plurality of laminations together to form a pole member. A stator is molded around the pole member so that an end of the pole member is located adjacent an exterior surface of the... | 09/11/2001 |
| 6265804 | Electric motor with split stator core and method of making the same An electric motor includes a rotor and a stator including a plurality of unit cores each of which has two ends. The unit cores are disposed so that the ends of each unit core are adjacent to the ends of the neighboring unit cores respectively. Each unit c... | 07/24/2001 |
| 6265800 | Diskette incorporating permanent magnet generator with reduced cogging torque and permanent magnet generator for use in diskette A permanent magnet generator is so thin as to be incorporated in a 3.5" diskette. The generator having so low cogging torque that can be rotated smoothly even by a low torque driving source as a 3.5" FDD to generate stable output is disclosed. It has stat... | 07/24/2001 |
| 6181047 | Permanent magnet motor with improved stator core and washing machine provided therewith A permanent magnet motor includes a rotor having a permanent magnet and a stator core having circumferential teeth the number of which is 2n where n is an integer equal to or larger than 2, the teeth including first teeth the number of which is n and seco... | 01/30/2001 |
| 6166471 | Dynamo-electric machine A dynamo-electric machine comprises a stator having a stator core formed with 9 slots and a first 3-phase stator coil and a second 3-phase stator coil inserted into the slots, and a rotor disposed inside the stator for forming 8 magnetic poles, the first ... | 12/26/2000 |
| 6087751 | Reluctance type rotating machine with permanent magnets A reluctance type rotating machine includes a stator having armature windings arranged on an inner periphery of the stator, a rotor having projection portion forming magnetic poles, and a plurality of permanent magnets arranged on both side faces of the p... | 07/11/2000 |
| 6051903 | Switched reluctance motor A switched reluctance motor driven by a two-phase source, includes a stator having an even number of evenly-spaced, like stator poles defining a gap between each stator pole; windings for each of the two phases of the motor wound about stator poles that a... | 04/18/2000 |
| 6046568 | Staggered pole switched reluctance motor A switched reluctance machine includes a first element having a plurality of uniform poles and a second element having a first pole and a second pole. The first pole has a wide face and the second pole has a narrow pole face. The first and second elements... | 04/04/2000 |
| 6002190 | Weight optimized rotors A substantial saving of material cost and weight is obtained in an induction motor by a rotor including two sets of differently punched laminations. The laminations in one of the two groups each weigh less than 95% of the laminations in the other one of t... | 12/14/1999 |
| 5990593 | Permanent magnet rotor type electric motor A permanent magnet rotor type electric motor is formed of a stator core generating a rotation magnetic field, and a rotor core rotationally situated inside the stator core. The rotor core includes a first core member for generating a magnet torque, perman... | 11/23/1999 |
| 5982055 | Miniature motor A miniature motor with a two-pole stator, and a rotor having three or more salient poles each having a core with flanges extending toward both sides thereof and a winding. The rotor is adapted to simulate a two-pole construction by cutting off at least th... | 11/09/1999 |
| 5969444 | Stepping motor and taking lens barrel for camera incorporating said stepping motor A stepping motor is equipped with a rotor, a supporting member that rotatably support the rotor, and stators that have multiple stator teeth and that face each other across the diameter of the rotor, wherein said multiple stator teeth are positioned such ... | 10/19/1999 |
| 5962944 | Permanent magnet rotor type electric motor In a permanent magnet rotor type electric motor having a stator core generating a rotation magnetic field and provided therein with a rotor core in which each magnetic pole is formed by a permanent magnet, the rotor core is fabricated by coaxially and uni... | 10/05/1999 |
| 5962938 | Motor with external rotor An inside out electric motor includes a rotor having an interior surface defining an interior space and a magnetic element mounted on the rotor. The motor also includes a stator having a bobbin. The bobbin has a bearing positioned at a central axis of the... | 10/05/1999 |
| 5852334 | Staggered pole switched reluctance motor A switched reluctance machine includes a first element having a plurality of uniform poles and a second element having a first pole and a second pole. The first pole has a wide face and the second pole has a narrow pole face. The first and second elements... | 12/22/1998 |
| 5793133 | Flat vibration generating apparatus A flat vibration generating apparatus wherein a flat coreless eccentric vibrator armature generates an eccentric vibration desired from the aspect of body feel. An air-core armature coil group thereof consists of m pieces (where m is an integer of 3 or mo... | 08/11/1998 |
| 5767607 | Weight optimized rotors A substantial saving of material cost and weight is obtained in an induction motor by a rotor including two sets of differently punched laminations. The laminations in one of the two groups each weigh less than 95% of the laminations in the other one of t... | 06/16/1998 |
| 5751087 | Armature winding offset angle excited and speed controlled rectifier type electric machine An electric machine uses materials with hysteresis characteristics (such as cast steel) to form the field poles and magnetic flux to align with the magnetic flux in the armature excited by the inclined angle of the brushes for use as a one directional rot... | 05/12/1998 |
| 5742110 | DC motor magnetic circuit configuration with high flux density A DC motor magnetic circuit configuration having reduced flux leakage and improved flux density that leads to greater motor efficiency and a higher motor constant. In one embodiment of the invention, and improved permanent magnet DC motor is provided that... | 04/21/1998 |
| 5705873 | Light-quantity control device An optical apparatus having a light-quantity control device includes: a) a rotating member having a plurality of magnetic poles; b) a stator having a plurality of magnetic pole sections opposed to the rotating member; c) a coil for exciting the stator; d) an input ... | 01/06/1998 |
| 5705871 | Pulse generator having index angles formed by permanent magnet rotor A pulse generator includes a rotor assembly which is formed by circularly arranged magnetic poles, and a stator assembly which is disposed coaxial with the rotor assembly and is formed by stator coils arranged circularly. Index angles defined by the circu... | 01/06/1998 |
| 5598046 | Stepping motor with different sized or missing teeth A width of polar teeth is made smaller at a region close to a gate portion 20 than a width of the polar teeth at the other region or a part of the polar teeth is eliminated at the region close to the gate portion 20 and the gap between the polar teeth is ... | 01/28/1997 |
| 5578878 | Counterbalanced electric motor An armature assembly 50 for an electric motor 10 is inherently balanced despite the presence of a secondary shaft 74 extending from a primary armature shaft 72 longitudinally along an eccentric axis 75 offset radially from the longitudinal axis 15 of the ... | 11/26/1996 |
| 5428257 | Single-phase reluctance motor adapted to start in a desired direction of rotation A single-phase reluctance motor is constructed so that either the rotor or the stator (or both) has poles in which there are areas of different saturation induction (thereby forming an asymmetric saturation characteristic in these poles), as a result of w... | 06/27/1995 |
