Abstract: Significantly increased torque is provided from a motor having a stator with a core and at least two three-phase windings wound on the core. The two windings are separated spatially by 30 electrical degrees. Power is provided to the two windings by two power supplies which each provide power at the same fundamental frequency and with a component at the third harmonic of the fundamental, with the power provided from one power supply shifted in time by 30° of the fundamental frequency with respect to the power provided by the other power supply. The additional third harmonic component reduces the effective peak flux density, allowing an increase in the fundamental component of flux to allow an increase in effective torque, with the third harmonic component also providing additional torque.

Abstract: The invention provides an electromagnetic reciprocal drive mechanism having a movable part that is simple to manufacture, dimensionally stable and inexpensive. The device has; a permanent magnet cluster 3, and a spider 4 and retainer 5 that concentrically support the permanent magnet cluster 3, an outer laminated core 6 provided adjacent to the permanent magnet cluster 3, and an electromagnetic coil 8 wound around the outer laminated core 6. An adhesive paper sheet 13 having an adhesive layer 11 on an inner surface and which can be impregnated with an adhesive 12 is wrapped around an outer periphery of the permanent magnet cluster 3, the spider 4 and the retainer 5. The adhesive 12 is then impregnated into the adhesive paper sheet 13 and solidified. In the adhesive paper sheet 13 and the adhesive layer 11 is formed of a plurality of small holes.

Abstract: A power operating system for a vehicle liftgate includes an actuator having a gas strut and a linear electric motor mounted thereto along a common axis. By activating the linear electric motor, a slidable rotor moves along the linear stator to drive the gas spring between an extended position and a retracted position to provide remote operation of the liftgate. When power is unavailable to the linear electric motor, the liftgate may still be manually opened and closed in the conventional manner without the necessity of an override.

Abstract: A valve assembly has a valve body defining a chamber with a controlled outlet. A stop and seat are spaced from each other and are supported within the chamber in axial alignment with the controlled outlet. A plunger reciprocably moves between the stop and the seat to open and close the controlled outlet through the operation of a solenoid assembly. The solenoid assembly includes a spool supported between two plates. An electrical coil is disposed around the spool for receiving electrical current and generating a magnetic flux. A primary magnetic flux loop forms a path around the spool, through the two plates, the plunger and the stop to move the plunger away from the controlled outlet. An annular magnetic flux regulator made of magnetic conductive material is disposed in the spool to provide a secondary bypass magnetic flux flow path for a portion of the generated magnetic flux during high amp-turn operating conditions.

Abstract: A motor actuation device is constructed of a motor a reduction gear train and a detection mechanism. The reduction gear train includes a worm gear and a worm wheel. The worm gear is fixed to a rotary shaft of the motor and meshes with the worm wheel. The worm wheel transmits the rotation of the motor to the lens barrel to slide it along an optical axis. The detection mechanism includes a first spur gear, an idle gear, a second spur gear, an impeller and a photo interrupter. The first spur gear is molded with the worm gear integrally. The idle gear meshes with the first spur gear and the second spur gear. When the motor causes the rotation, a blade of the impeller passes in the photo interrupter and a pulse is generated from the photo interrupter.

Abstract: In a joint driving apparatus, a linear motor includes at least one stator part, a movable element, and an electromagentic coil device for energizing the stator part to generate a magnetic field, the stator part includes pairs of magnetic poles, the pairs are adjacent to each other in each of the stator parts, the magnetic poles of each of the pairs face to each other through the movable element to generate a magnetic field passing the magnetic poles through the movable element, and a magnetic polar direction of one of the at least two pairs is opposite to that of another one of the at least two pairs when the stator part is magnetized.

Abstract: An electric motor includes a Cockcroft ring for producing a magnetic field having lines of flux extending in a first direction through an air gap. A disc capable of at least two-dimensional motion in a plane relative to the Cockcroft ring provides a plurality of conductive paths, each path having a segment that extends through the magnetic field in a second direction so that interaction with an electric current passing through a particular segment produces a thrust force acting on the disc via that segment. A multiphase toroid shaped transformer induces electric currents to flow in the conductive paths and thus through the corresponding segments. The direction and magnitude of the respective thrust forces and thus the motion of the disc relative to the Cockcroft ring can be controlled by varying the magnitude and/or phase relationship of the electric currents flowing through the segments.

Abstract: An improved magnet for use in voice coil actuators is disclosed. The improved magnet includes first and second ends and a top surface, which includes one or more reversed slope notches. Each reversed slope notch may be located in proximity to the ends of the magnet, and may be located such that the magnet is shaped symmetrically about its center. The reversed slope notch is generally characterized in that it includes a notch surface which slopes downward towards the associated end of the magnet. The reversed slope notch or notches minimize the drop-off of force of the voice coil actuator near the ends of the actuator's stroke. In one embodiment, the magnet is part of a linear voice coil actuator that includes a return structure enclosing a magnet and an air gap. In this embodiment, the top surface of the magnet is located adjacent the air gap, and a current-carrying coil travels through the air gap.

Abstract: A prime mover using a split coil for magnetically inducing movement of a steel piston. The magnetic effects are emphasized in higher reciprocating movement by the proximate introduction of a permanent magnet. The prime mover is sparkless, brushless, quiet, low friction, and can operate on a wide array of voltages, including high frequency very low voltage signals.

Abstract: A thrust converter includes reciprocation movement means 1; reciprocation-rotation conversion means 2 for converting reciprocating movement of the reciprocation movement means into rotational movement; rotation-reciprocation conversion means 7 for converting rotational movement of the reciprocation-rotation conversion means; and reaction-force receiving means 11 for supporting reaction force stemming from reciprocation movement of the rotation-reciprocation conversion means. Thrust imparted to the reciprocation movement means can be imparted to a load while being amplified or reduced, through employment of a compact and simple construction.

Abstract: A device is presented having a first and a second motor control device. The first and the second motor control devices control rotation speed of a motor. The first or the second motor control devices continue to control rotation speed of the motor upon failure of either the first or the second motor control device. Also presented is a device having at least one motor. The at least one motor having at least one pair of bifilar windings. A further device is presented having at least one motor. The at least one motor having at least eight magnetic lobes. Another device is presented having a first motor connected to a shaft. A second motor is connected to the shaft. A fan hub is connected to the shaft. A fan blade is connected to the fan hub.

Abstract: A phase angle monitoring apparatus for phase monitoring a vibratory system includes a controller that produces a phase angle control signal representative of the lead or lag between the vibratory movement of two vibrating masses. The phase angle control signal is coupled to at least one of the vibrating masses to adjust the vibration of the mass to produce a desired phase angle, for example one-hundred eighty degrees (180°).

Abstract: A stage apparatus includes a table disposed above a base table so as to oppose to the base table, an X-axis-direction table support mechanism portion disposed between the base and the table for supporting the table in a state that the table is capable of moving in an X-axis-direction within a two-dimensional plane, a Y-axis-direction table support mechanism portion disposed between the base and the table for supporting the table in a state that the table is capable of moving in a Y-axis-direction within a two-dimensional plane, an X-axis-direction linear guide portion formed on an upper surface of the base and extending in the X-axis-direction, a Y-axis-direction linear guide portion formed on the upper surface of the base and extending in the Y-axis-direction, an X-axis direction movable member provided so as to move along the X-axis-direction linear guide portion and connected to the Y-axis-direction table support mechanism portion, a Y-axis-direction movable member provided so as to move along the Y-axis-d

Abstract: A vehicle electrical generator comprises a magnetic ring on one side of a wheel, and an inductive coil on a shaft of the wheel corresponding to the magnetic ring, thus when rolling the wheel, the magnetic ring rotating with the wheel within the inductive coil, this rotation produces electricity, which then transferred by a pair of negative and positive wires to the load.

Abstract: A magnet type stepping motor which has (1) a stator with three-phase stator windings, and 6m pieces of stator main pole arranged side by side, where m is an integer and ≧1, the stator windings of one phase are wound around every two stator main poles among the 6m pieces of the stator main pole, wherein when the stator windings of one phase are excited with a direct current, m pieces of N pole and M pieces of S pole are formed alternately on the 6m pieces of stator main pole, and (2) a rotor of a cylindrical permanent magnet magnetized in the circumferential direction to form Z/2 pieces of N pole and Z/2 pieces of S pole alternately, where Z is the number of rotor poles.

Abstract: A linear actuator includes a screw shaft rotatably supported within a housing with play in motion in the axial direction of the screw shaft, and a cushioning stopper disposed between the housing and the screw shaft and elastically deformable to absorb a force acting from the screw shaft to the housing when the screw shaft is forced to move relative to the housing in the axial direction within the range of the play at an abutment of a rod with an obstacle or stopper. When the rod is stopped moving, the motor current increases with the degree of elastic deformation of the cushioning stopper. An overload sensor cuts off the supply of power to an electric motor when excessive current in the motor is detected.

Abstract: A multi-phase linear motor includes a number of magnets side by side with multiple phase coils in which alternating currents that are offset by a predetermined value are made to flow. The interaction between the magnets and the phase coils causes a relative linear displacement of magnets with respect to the phase coils. In the linear motor in question, the phase coils lie on an axis that is perpendicular to the direction of motion.

Abstract: Pseudoelastic elements are shaped in order to form springs which exhibit relatively constant force levels over a major fraction of maximum deflection capacity during loading and also during unloading. The shape of sail pseudoelastic elements is chosen to concentrate at least one of flexural and torsional deformations within limited regions. The element may be braced outside said regions in order to further concentrate deformations within said regions. Loading of said pseudoelastic springs thus produces strains within said regions which are largely corresponding to the upper pseudoelastic stress plateau where strain variations cause relatively small changes in stress. Unloading of said pseudoelastic springs also produces strains within said regions which are largely corresponding to the lower stress plateau of the pseudoelastic stress-strain curve where stress is subject to relatively small changes with strain variations.

Abstract: A motor allowing multiple degrees of output freedom is disclosed. The motor includes a stator having an interior surface forming at least a portion of a sphere or curved surface and first and second substantially orthogonally positioned stator coils wound on the interior surface. A rotor is fixed to an output shaft and movably supported adjacent the stator with an air gap disposed between the rotor and the stator. The rotor includes a plurality of magnets disposed thereon and is movable along the interior surface in directions defining at least first and second degrees of freedom. Upon energization of the first stator coil, a first magnetic field is established to force at least a first one of the magnets and the rotor in a direction in the first degree of freedom. Upon energization of the second stator coil, a second magnetic field is established to force at least a second one of the magnets and the rotor in a direction in the second degree of freedom.

Abstract: A linear motor includes an improved heat dissipation mechanism, which has the function of increasing the area of heat dissipation from coils of the linear motor, reducing the weight of the rotor, and simplifying the heat dissipation mechanism. The coils of the present invention have open centers which serve as heat dissipation holes. A heat sink compound is smeared around the heat holes to increase the area of heat dissipation, and reduce the weight of the rotor such that the thrust and operating life of the motor is increased. Furthermore, the present invention also can include a heat dissipation mechanism (such as a heat pipe or an air blowing pipe) set into the heat holes near the heat source to raise heat dissipation efficiency.