Class / Patent application number | Description | Number of patent applications / Date published |
310049000 | Step-by-step | 18 |
20080211354 | Bearingless Step Motor - There is provided a bearingless step motor in which a rotating shaft can rotate while rising from a main body by a magnetic force without using a mechanical bearing. The bearingless step motor comprises a stator including stator cores having winding portions and a rotor including a rotating shaft and rotor cores. The rotor rotates by a magnetic interaction between the rotor cores and the stator cores. A first permanent magnet is mounted to the rotor and a second permanent magnet is mounted to the stator. The first permanent magnet and the second permanent magnet are arranged so that a repulsive force is generated between magnetic poles. There is little power consumption for raising the rotating shaft and a complicated system for controlling the rise of the rotating shaft is unnecessary. Thus, the motor can be manufactured with a light and compact structure. | 09-04-2008 |
20080211355 | STEPPING MOTOR - A rotor rotable about a rotary axis is magnetized so as to have a plurality of poles along a circumferential direction thereof. Stator yokes each of which has a plurality of pole portions facing an outer circumferential face of the rotor is provided. An exciting coil is wound on the pole portions. Each of the stator yokes is made of a sheet of silicon steel having a thickness of 0.7 mm. | 09-04-2008 |
20080224573 | Step motor - A step motor includes a rotor, which has a driving member and a permanent magnet set that is affixed to the driving member and has multiple magnetic poles alternatively arranged around the driving member, and two stator windings that are arranged at two opposite sides relatively to the rotor, each having a plurality of electromagnetic poles arranged at two opposite sides and controlled to alternatively attract and repulse the magnetic poles of the permanent magnet of the rotor for causing the rotor to rotate step by step. | 09-18-2008 |
20080224574 | STEPPING MOTOR AND STEEL PLATE FOR MANUFACTURING THE STEPPING MOTOR - A stepping motor comprising: | 09-18-2008 |
20080231148 | Step-by-step motor able to carry out up-and-down motion - A step-by-step motor able to carry out up-and-down motion includes a housing, a transmitting gear, a worm gear, an interacting member, a top rod, a circuit board with a transmitting motor, a cover body and an adjusting member. The level of the headlamp of an automobile can be adjusted by inserting an adjustment tool through one lateral through hole of the recessed chamber of the cover body from outside to have the engage teeth of the adjustment tool engaged with one engage notch of the adjusting member and turning the adjustment tool to actuate the adjusting member to rotate and actuate the top rod to move upward, or by inserting an adjustment tool in the bottom slit of the projecting post of the adjusting member and turning it around to drive the adjusting member to rotate and actuate the top rod and the headlamp to move upward or downward. | 09-25-2008 |
20080238265 | Stepping motor and rotor - A stepping motor has a stator and a rotor disposed to surround the stator. The rotor has an annular magnet which has a plurality of magnetic poles formed along a circumference thereof, and a comb-teeth-shaped back yoke which is disposed to surround the magnet and has a plurality of comb teeth, the comb teeth being faced boundary positions of adjacent magnetic poles. | 10-02-2008 |
20080252181 | Small diameter stepping motor, bobbin used therein and manufacturing method thereof - In a small diameter stepping motor including two stator units each including a bobbin formed of an insulating material, each bobbin includes: a circular hollow cylinder portion having a winding; two flanges disposed respectively at the both ends of the cylinder portion; and a terminal structure disposed at one of the two flanges and including two terminal blocks and a pair of electrical contact members at which the lead-out lines of the winding are terminated, wherein the two terminal blocks are circumferentially shifted in position from each other with respect to the cylinder portion axis extend axially outwardly, and the terminal blocks of one bobbin intermesh with the terminal blocks of the other bobbin such that the terminal blocks of the one bobbin overhang a part of the winding wound on the other bobbin and vice versa when the two stator units are coupled to each other. | 10-16-2008 |
20080297009 | STATOR MEMBER AND MOTOR - A stator member may include a coil bobbin provided with a through-hole and around which a coil is wound, and a yoke provided with a fixing part that is inserted into the through-hole of the coil bobbin. The through-hole of the coil bobbin is provided with at least a recessed part at a position corresponding to a burr of the fixing part of the yoke. Another stator member may include a first yoke provided with a fixing plate at a side end portion of the first yoke, and a second yoke provided with a fixing hole into which the fixing plate is inserted. The first yoke and the second yoke are disposed to face each other and a recessed part is formed on the fixing hole of the second yoke at a position corresponding to a burr formed on the fixing plate. | 12-04-2008 |
20090015110 | Armature, Motor and Compressor and Methods of Manufacturing the Same - An armature including magnetic cores arranged on a surface of a plate, coils provided around the magnetic cores, and a magnetic material plate having a plurality of first magnetic members is characterized in that the magnetic material plate is attached to a surface on the opposite side to a surface where the magnetic cores and the plate come in contact, a gap is provided between each of the first magnetic members adjacent to each other, and the area of a surface where the first magnetic members come in contact with the magnetic cores is larger than the area of a surface where the magnetic cores come in contact with the first magnetic members. | 01-15-2009 |
20090058233 | STEPPING MOTOR - A stepping motor may include a rotor having a rotation shaft and a permanent magnet, a stator provided with a stator core formed with a flange part and pole teeth, a drive coil and a terminal block disposed on an outer peripheral side of the stator. The flange part of the stator core may be provided with a terminal block holding part and the terminal block holding part is formed with a first holding part, which is formed to be bent from the flange part and extended in an axial direction of a motor, for supporting a bottom face of the terminal block. Further, a plurality of terminal pins may be arranged in the terminal block so that a plurality of the terminal pins is disposed in the terminal block along an axial direction of the rotation shaft. | 03-05-2009 |
20090066196 | Stepping motor - A stepping motor includes: a stator which includes a cup-like first (outer) yoke having a plurality of notches formed at its bottom plate, a second (inner) yoke, and a bobbin having a coil wound therearound and housed in the annular hollow space formed by the first and second yokes; and a pair of bearings each of which includes a hollow-cylindrical main body and a flange structure having a plurality of protrusions, and is attached to the stator such that the protrusions engage with the notches of the first yoke thereby preventing the bearing from rotating relative to the first yoke, and such that the protrusions make contact with a flange of the bobbin thereby precisely positioning the bearing relative to the first yoke with respect to the axial direction, which prohibits any portions of the bearing from protruding axially outwardly beyond the bottom plate of the first yoke. | 03-12-2009 |
20090072674 | Stepping Motor - A stepping motor has stators arranged at both end sides in the direction of a shaft of a rotor magnet, each of the stators includes inner and outer yokes having pole teeth opposed to the outer peripheral surface of the rotor magnet, at least the outer yoke among the inner and outer yokes has a tubular bending part, and the bending part is fixed to a cylindrical core made of a magnetic material. | 03-19-2009 |
20090072675 | PULSE MOTOR - A pulse motor includes: a first iron core having a plurality of iron core teeth; a second iron core having a plurality of iron core teeth, the second iron core being arranged to oppose to the first iron core through an air gap; and commutating pole teeth formed between the iron core teeth; wherein a level difference is provided between a tooth tip of the iron core tooth and a tooth tip of the commutating pole tooth | 03-19-2009 |
20090072676 | ROTATING ELECTRIC MACHINE HAVING SWITCHED OR VARIABLE RELUCTANCE WITH FLUX TRANSVERSE TO THE AXIS OF ROTATION - An electric machine, such as a switched reluctance motor (SRM), having one or more transverse flux axes is described. The rotor and stator of the electric machine have more than one phase, not necessarily of even number. Flux guidance regions within the stator are angularly and spatially located such that they may be transverse, or not coinciding with, the plane perpendicular to the axis of shaft rotation. The flux guidance regions are composed so as to contain a magnetic field whose flux is guided in either a loop or coupled configuration. In the loop configuration, multiple flux guidance paths that are able to operate simultaneously exist within each chuck arrangement. In the coupled configuration, a single primary flux guidance path exists within the chuck arrangement. Transverse flux guidance allows for the removal and replacement of stator windings without significant disassembly or removal of the motor. | 03-19-2009 |
20090108711 | HYBRID STEPPING MOTOR HAVING HIGH TORQUE DENSITY - There is provided a hybrid stepping motor comprising the following: a first rotor yoke and a second rotor yoke, each of the rotor yokes having a plurality of rotor teeth on a periphery thereof; a rotating shaft located between the first and second rotor yokes and supporting the first and second rotor yokes on a same axis, the rotating shaft including at least one permanent magnet magnetized in a direction of the axis; and a plurality of stator yokes, each of the stator yokes having a core portion, a coil wound around the core portion, and a plurality of stator teeth extending parallel to the axis from opposed end portions of the core portion, the stator yokes being disposed at regular intervals around the rotating shaft so that a constant air gap is maintained between radially inward surfaces of the stator teeth and radial end surfaces of the rotor teeth. A positive current is applied to the opposed and paired coils of said coils and a negative current is applied to the rest coils of said coils. The positive current and the negative current are applied at the same time and magnitude. | 04-30-2009 |
20090108712 | SHORT-FLUX PATH MOTORS / GENERATORS - According to one embodiment of the present invention, an electric machine includes a stator and a rotor. The stator includes a stator pole including a first leg and a second leg, and a gap defined between the first and second legs. The rotor includes a rotor pole. The rotor is configured to rotate relative to the stator such that the rotor pole rotates through the gap defined between the first and second legs of the stator pole. The stator pole includes a laminar stator pole structure including multiple lamination layers. | 04-30-2009 |
20090108713 | Outer Rotor Type Hybrid Stepping Motor - An outer rotor type hybrid stepping motor includes a stator, a rotor, a magnet disposed axially in the stator or the rotor, a stator core disposed inwardly from a gap between the stator and rotor, and a stator winding on the stator core. The rotor is disposed outside the gap. The magnet has an axial cross sectional area A. The residual magnetic flux density of the magnet is Br, and a total of magnetic fluxes exiting axially from the surface is A×Br. A gap average magnetic flux density, determined by dividing A×Br by the top cross sectional area small teeth poles on the rotor is Bg; pitch of the teeth is τ; and tooth width is Tw. Average magnetic flux density Bg, tooth pitch τ, and tooth width Tw are determined by the equation K=1/(π×Bg×Tw/τ), with the coefficient k in a range of 0.56-0.66 (1/T). | 04-30-2009 |
20090167119 | SWITCHED RELUCTANCE MOTOR - A plurality of concavities and convexities is provided on tips of all rotor teeth | 07-02-2009 |