Patent application number | Description | Published |
20100237752 | MOTOR AND ELECTRONIC DEVICE USING THE SAME - This motor includes a stator whereupon a plurality of magnetic poles are arranged at first prescribed intervals on the outer circumference section, and a rotor which is rotatively arranged on the outer circumference of the stator by having a prescribed space in between and has permanent magnets magnetized to different polarities at second prescribed intervals. The magnetic pole of the stator forms an extending section which extends from a magnetic pole base section in a direction parallel to the permanent magnet, and the extending length of the extending section in the direction parallel to the permanent magnet is same as that of the magnetic pole base section in the direction parallel to the permanent magnet or shorter. | 09-23-2010 |
20100244637 | MOTOR AND ELECTRONIC DEVICE USING SAME - A motor comprises a stator having a plurality of magnetic poles disposed at first predetermined intervals along an outer periphery thereof, and a rotor having a permanent magnet with poles magnetized alternately to have different polarities at second predetermined intervals and disposed rotatably around the outer periphery of the stator with a predetermined gap. The magnetic poles of the stator has extended portions formed in a manner to extend from magnetic polar bases into a direction generally parallel to the permanent magnet, and the extended portions are formed of a high-permeability magnetic steel sheet with silicon content less than 3.0 wt-%. | 09-30-2010 |
20100259126 | MOTOR AND ELECTRONIC DEVICE COMPRISING THE SAME - A motor comprising a stator having a plurality of magnetic poles disposed in a circumferential direction along an outer periphery thereof, a rotor disposed rotatably around the outer periphery of the stator, and a magnet disposed in a circumferential direction along an inner periphery of the rotor. The stator is formed by laminating sheet-like plates. A plurality of the sheet-like plates including an outermost layer of this laminated body comprises a flat portion substantially perpendicular to the magnet, and an extended portion bent to a direction substantially parallel to the magnet. A part of the sheet-like plate having the extended portion disposed to the outermost side is formed into a thickness smaller than thicknesses of the other parts. | 10-14-2010 |
Patent application number | Description | Published |
20090091204 | MOTOR HAVING TWIN-ROTOR - A motor includes a stator, a first rotor and a second rotor. The stator has a plurality of outer teeth projecting outward from an annular stator yoke, a plurality of inner teeth projecting inward from the stator yoke, and windings wound on both of the teeth. Instead of providing both of the teeth with the windings, toroidal windings can be wound on the stator yoke at each section sandwiched between the slots, which stator yoke is disposed between each one of the inner slots and corresponding each one of the outer slots. This motor is structured such that the phases of cogging torque and torque ripple existing between the stator and the second rotor can be reversed with respect to the phases of cogging torque and torque ripple existing between the stator and the first rotor. | 04-09-2009 |
20090134735 | MOTOR HAVING TWIN-ROTOR AND APPARATUS HAVING THE SAME - A motor includes a stator which includes a stator core having an annular stator yoke, a plurality of outer teeth projecting outward from the stator yoke and a plurality of inner teeth projecting inward from the stator yoke, and a plurality of windings wound on the stator core. The motor also includes an outer rotor confronting the outer teeth with an air gap therebetween and an inner rotor confronting the inner teeth with an air gap therebetween. This motor thus has twin-rotor. The stator core includes outer slots between each one of the outer teeth as well as inner slots between each one of the inner teeth, and the windings are wound on the stator yoke between the outer slot and the inner slot. A cross sectional cut of the stator reveals that a sectional area of the outer slot is equal to that of the inner slot. | 05-28-2009 |
20130119835 | MOTOR AND ELECTRONIC DEVICE COMPRISING THE SAME - A motor comprising a stator having a plurality of magnetic poles disposed in a circumferential direction along an outer periphery thereof, a rotor disposed rotatably around the outer periphery of the stator, and a magnet disposed in a circumferential direction along an inner periphery of the rotor. The stator is formed by laminating sheet-like plates. A plurality of the sheet-like plates including an outermost layer of this laminated body comprises a flat portion substantially perpendicular to the magnet, and an extended portion bent to a direction substantially parallel to the magnet. A part of the sheet-like plate having the extended portion disposed to the outermost side is formed into a thickness smaller than thicknesses of the other parts. | 05-16-2013 |