Abstract: A mobile data storage device is configured in the manner of a data storage card, or a data storage stick. The mobile data storage device can include at least one electrical coil (7), and energy storage (6), a data storage (1), at least one interface unit (3), and at least one permanent magnet (8). The at least one interface unit (3) is configured for the output or the receiving of data that is stored, or that can be stored, in the data storage (1). The energy storage (6) can be inductively charged by a magnetic alternating field, which can be generated by displacing the at least one permanent magnet (8) in a region of the electrical coil (7). At least one of the at least one interface unit (3) is electrically coupled to the energy storage for the energy supply thereof.

Abstract: The invention claimed is a novel magnetic mirror air bearing for a Michelson interferometer with lateral motion. A precise kinematic mount is used in combination with magnetic fields wherein current can be applied on a centerline to move a piston and mirror laterally without pitch and yaw so as to effect accurate light beam reflection regardless of distance of lateral movement within a defined space. The assembly is able to operate across extended temperature ranges by utilizing materials which expand and contract at similar rates, and contains a thermalizing cavity which will thermalize the gas to avoid temperature induced artifacts.

Abstract: Embodiments of a linear vibrator are provided that are capable of reducing the manufacturing cost, increasing the product reliability and increasing the vibrating quantity. An embodiment of a linear vibrator can include a case formed of an upper case portion and a lower case portion coupled to each other to provide a predetermined inner space; a substrate disposed on an upper surface of the lower case portion; a first coil and a second coil installed at both end parts inside of the case and connected to the substrate; a spring having one side fixed on at least one of the inside faces of the case; and a magnet fixed at another side of the spring and located between the first and second coils inside of the case, where the magnet can vertically vibrate through an interaction with the first and second coils.

Abstract: A driving mechanism comprises: (i) an actuator comprising: an electro-mechanical conversion element; a driving member which is connected to one end of the electro-mechanical conversion element and moves in accordance with elongation or contraction of the electro-mechanical conversion element; and a weight member provided on the other end of the electro-mechanical conversion element; and (ii) a driven member frictionally engaged with the driving member, wherein the actuator allows the driven member to move along the driving member, and the weight member comprises a member which reduces a resonance frequency of the actuator.

Abstract: An electromagnetic actuator includes a rotor rotatable within a predetermined angular range, a magnetizing coil, and a yoke having an arcuate surface facing the rotor, and first and second magnetic-pole parts that have mutually different magnetic poles upon energizing the coil. The rotor includes a magnetized rotor part defining the outer peripheral surface of the rotor and magnetized to have different magnetic poles, a non-magnetized driving pin rotatable with the magnetized rotor part, and a protrusion part protruding radially from the rotor and facing the first or second magnetic-pole part while being magnetized to have the same magnetic pole as the outer peripheral surface of the rotor. The surface of the rotor that faces the yoke and that exerts a magnetic action is increased due to the inclusion of the protrusion part, and hence a desired maintaining force and driving torque can be obtained.

Abstract: An actuator includes a shaft supported in such a manner as to make axial reciprocating movement or rotational reciprocating movement around longitudinal axis thereof, and an electricity conducting member for making contact with the shaft at a plurality of points on a circumferential surface of the shaft used as an electricity conducting path leading to other members. Further, an electric toothbrush includes the actuator as a drive power source for a brush body, and the brush body is adapted to be supplied with an electric current through the shaft.

Abstract: The present invention provides a linear motor 1 which uses a plurality of cylindrical linear motors 2 to increase power and which can guide forward and backward movements using a simple configuration, the linear motor 1 requiring reduced manufacturing costs. A plurality of cylindrical linear motors 2 are provided each of which has a shaft member 3 made of a permanent magnet and a coil unit 4. A motor support 25 is provided which is able to support the coil units of the plurality of cylindrical linear motors 2 arranged in parallel. The shaft members of the plurality of cylindrical linear motors 2 are coupled together at ends thereof by coupling members 10, 11. A guide mechanism 32 is located inside the arrangement of the cylindrical linear motors 2 to guide movement of the shaft members 3 of the cylindrical linear motors 2. The number of guide mechanisms 32 is smaller than that of the cylindrical linear motors 2. For example, the single guide mechanism 32 is provided.

Abstract: An actuator including at least one moving body, at least one fixed body and a connecting member is provided. The moving body is suitable for moving along a direction, and includes at least one coil. In addition, the fixed body includes a permanent magnet and a yoke, wherein the coil is disposed between the permanent magnet and the yoke, and the polarity direction of the permanent magnet is parallel to the moving direction of the moving body. Furthermore, the connecting member is used for connecting the moving body and the fixed body. The actuator meets the requirements of miniaturization, low power consumption and low cost.

Abstract: At least one exemplary embodiment is directed to a stage apparatus which includes a stage movable in a first direction, a linear motor configured to drive the stage in the first direction, a magnet unit having first magnets disposed on the stage and second magnets disposed at both ends of a stroke of the stage such that the same poles of the first and second magnets face each other, and a supporting member supporting the second magnets. The supporting member is supported movably in the first direction.

Abstract: Improved energy conversion devices comprise a first ferromagnetic element, a second ferromagnetic element oriented such that similar poles of the first ferromagnetic element and the second ferromagnetic element can be positioned proximate each other, and a mechanical element connected to the first ferromagnetic element such that movement of the first ferromagnetic element can actuate the mechanical element to provide mechanical work. In some embodiments, the energy conversion devices can further comprise an externally powered temperature control device to selectively alter the temperature of the ferromagnetic elements to change the Curie temperature of the ferromagnetic elements. The change in temperature of the ferromagnetic elements and the orientation of the first and second ferromagnetic elements allows the repulsive force between the first and second ferromagnetic elements to result in mechanical work.

Abstract: A voice coil motor. A guide bar connects to a fixed base. A coil connects to the fixed base and includes a first winding portion and a second winding portion. A current direction in the first winding portion is opposite that in the second winding portion. A support base movably fits on the guide bar. A magnetic member connects to the support base and includes a first magnetic pole and a second magnetic pole. A magnetization direction of the magnetic member parallels a moving direction of the support base and magnetic member and is perpendicular to a central axis of the coil. The first and second magnetic poles respectively oppose the first and second winding portions of the coil. The first and second magnetic poles respectively interact with the first and second winding portions to generate a first force and a second force, moving the support base and magnetic member.

Abstract: An electrical energy generator that converts kinetic energy harvested from voluntary motor activity of a human or animal to electrical energy. The electrical energy generator includes a housing, a coil of electrically conductive material, a reciprocally movable electromagnetically active mass, springs connecting the mass to either the housing or to adjustment means engaged with said housing, and, optionally, means for constraining non-linear motion of the electromagnetically active mass, and/or means of mitigating motion retardation of the electromagnetically active mass within any existing housing atmosphere. The electrical energy generator may be associated with a carried item, such as a backpack.

Abstract: The present invention provides a cylinder-type linear motor capable of shortening the total motor length with respect to a predetermined stroke length and capable of being operated as a brushless DC motor without a sensor means for sensing the position of a moving part being added in the axial direction. The present invention also provides a moving part of said cylinder-type linear motor, which can improve the magnetic flux density distribution waveform near both end portions of the moving part assembly and can improve the thrust characteristic by bringing the magnetic flux density distribution waveform closer to a cosine waveform and by increasing the amplitude of cosine waveform.

Abstract: A linear compressor in which an inner core is integrally mounted with a magnet to linearly reciprocate simultaneously and is also mounted on a core frame that comes into close contact with an outer circumference of a cylinder. With this configuration, the core frame is able to stably support the weight of the inner core, resulting in improved rigidity and reliability of the compressor.

Abstract: A vibrator has a cup-shaped casing, a substrate provided to close an upper end opening of the casing, a magnetic circuit assembly provided in the casing, a first suspension and a second suspension that support the magnetic circuit assembly from above and below, and a voice coil secured to the substrate and inserted into a magnetic gap in the magnetic circuit assembly. The first suspension has an inner fixed portion that is secured to the substrate and that has a radially inner ring-shaped portion and a pair of extensions extending radially outward from mutually diametrically opposing positions on the ring-shaped portion. The first suspension further has a pair of leaf spring portions arcuately extending from the respective extensions through an angle of about 270 ° in symmetry to each other around the axis of the voice coil.

Abstract: Provided is a linear motor actuator which generates a sufficient thrust force and a retaining force and is remarkably smaller than conventional linear motor actuators. The linear motor actuator includes a base member (1) provided with a bottom plate (10) and a pair of side walls (11) and formed in a channel shape; a track rail (2) laid on the bottom plate along a longitudinal direction of the base member; a slide table (3) moving along the track rail; stator magnets (40) arranged on an inner side surface of each of side walls of the base member; and a pair of coil members (41) mounted to the slide table and opposed to the stator magnets provided to each of the side walls of the base member, thereby constituting a linear motor (4).

Abstract: A vibratory linear actuator includes a stator with a magnetic pole surface, a movable member with a magnetic pole surface, an electromagnet arranged in one of the stator and the movable member, a permanent magnet arranged in the other of the stator and the movable member and a support unit for movably supporting the movable member so that the magnetic pole surface of the electromagnet can oppose the magnetic pole surface with a gap left therebetween. The actuator is designed to vibrate the movable member by supplying an electric current to the electromagnet. The support unit includes a fixed portion to be fixed to a housing for accommodating the actuator, and the stator is configured to be fixed to the support unit as the support unit is fixed to the housing.

Abstract: An electrical linear motor for propelling a marine vessel comprises a thruster assembly disposed within a guide tube. Permanent magnets are attached to the thruster assembly and placed in close proximity to electrical coil windings, which are positioned outside of and parallel to the guide tube. Electrical current energizing the coil windings creates an electromagnetic field, which interacts with the magnetic field of the magnets to cause reciprocating linear motion of the thruster assembly with the guide tube. During the non-propelling back stroke, a check valve on the thruster assembly is in open position to allow free passage of water. The check valve is moved to a closed position during the working stroke of the thruster assembly, allowing the thruster assembly to propel the marine vessel.

Abstract: Apparatus to build a self sufficient electromagnet engine unit. Mechanically creating: Using a number of electromagnet solenoids sets, pistons with connecting rods to the crank shaft. Batteries with connectors to the solenoids to supply power to start up the unit. Distributor for timing and synchronizing the current flow to the unit. Alternator to supply electricity to the whole unit. It uses no fuels of any kind. It runs on electricity, create its own power and recharges its own battery. It creates no pollution, economically feasible, and it can be used for many different kinds of applications, commercial as well as industrial.

Abstract: A motor and a method for serves finding the position of an armature in relation to a stator of the motor.

Abstract: A magnet assembly includes a back iron and an array of magnets. The back iron is in the form of a plate having opposed surfaces. The magnets are arranged along one of the surfaces, with the other surface being dimensioned and configured according to the magnetic field distribution associated with the magnets. The back iron geometry provides for reduced mass, reduced leakage flux, and high flux densities to improve performance of a linear motor that employs such a magnet assembly.

Abstract: A linear power-generating apparatus is provided, including a column element having permanent magnetic field, and a coil set surrounding the column element. The column element includes a plurality of permanent magnetic segments and a plurality of yokes placed between two neighboring permanent magnetic segments. The magnetic segments are arranged in the manner that the same polar ends are facing each other. The coil set includes a plurality of coils. The winding directions of two neighboring coils are opposite. The linear power-generating apparatus of the present invention can induce electromotive force in the coil set to generate power by using the linear back-and-forth relative motion between the column element and the coil set. In the constant speed relative motion, the linear power-generating apparatus of the present invention can generate a near-constant direct current (DC) voltage.

Abstract: By integrating the mechanics and the electromagnetism needed to push and pull the magnets on the pistons. The plug assembly is a staging area, for the coils and rods (mediums), to initiate the changing of polarity. Witch is controlled by a computer, for top performance.

Abstract: An electromechanical generator for converting mechanical vibrational energy into electrical energy, the electromechanical generator comprising a housing, an electrically conductive coil assembly fixedly mounted in the housing, the coil assembly having radially inner and outer sides, and upper and lower edges, thereof, a mount for the coil assembly extending inwardly of the radially inner side for fixing the coil assembly in a fixed position in the housing, a magnetic core assembly movably mounted in the housing for linear vibrational motion along an axis, and a biasing device mounted between the housing and the magnetic core assembly to bias the magnetic core assembly in opposed directions along the axis towards a central position, wherein the magnetic core assembly encloses the electrically conductive coil assembly on the radially outer side and on the upper and lower edges, and on a part of the radially inner side, the magnetic core assembly having a gap on a radially inner portion thereof through which the

Abstract: An electrical device for harvesting energy includes a container, a magnet situated in the container, a fluid partially filling the container, and a conductive member coiled around the container, wherein oscillation of the magnet through the coil induces an electrical signal.

Abstract: An electric engine having four drive mechanisms, four piston coil systems that fire ninety degrees (90°) apart and cause a previously fired piston coil system to return to its original position when another piston is subsequently fired and four crank systems, wherein each drive mechanism comprises a metallic T-yoke, ring-shaped magnet, metallic hollowed cylinder; each piston coil system comprises a wire coil, coil ring/slab and non-metallic spacer/coil-rod-connector; and each crank system comprises a drive rod, crank rod, guide plate/rod guide, guide plate housing, crank system housing, non-metallic gasket and crankshaft.

Abstract: Methods and systems are provided for driving one or more force coils. A system for driving force coils is provided including a PWM drive coupled to a first coil and a linear drive coupled to a second coil. The PWM drive efficiently drives the first coil to apply a first force. The linear drive drives the second coil to apply a second force that is substantially noise-free. The first force is greater than the second force.

Abstract: An origin microadjustment mechanism for a linear motor is assembled on a stator of the linear motor and comprises a load bearing member fixed to a sensing member and two positioning seats. The load bearing member is movably passed through the positioning seats, and the positioning seats are fixed to the stator, so as to adjust the position of the sensing member relative to the stator.

Abstract: In a linear actuator (1), on the inside of a rectangular tubular movable element (3), a linear guide (14) that supports the movable element (3) so as to be linearly movable is positioned at a center of the movable element (3), and a position detecting mechanism (20) and load attaching member (13) that sandwich the linear guide are disposed linearly in a vertical direction. This arrangement enables a center of gravity of the movable element (3) to be matched with a center of the linear guide (14). A magnetic circuit is in a bilaterally symmetrical relationship with regard to the center of the movable element (3). Therefore, a center of a thrust force that acts upon the movable element (3) is matched with the center of the movable element (3). The center of the thrust force that acts upon the movable element (3), the center of gravity of the movable element (3), and the center of the linear guide (14) are positioned at the center of the movable element (3).

Abstract: An electromagnetic exciter includes a casing having a cylindrical side wall with first and second end openings. A suspension supports a magnetic circuit assembly vibratably in the cylindrical side wall. The suspension has a ring-shaped outer section integrally formed along the peripheral edge of the second end opening of the cylindrical side wall, an inner section provided at the radial center of the cylindrical side wall, and a connecting section that interconnects the inner and outer sections. The inner, outer and connecting sections are integrally molded with the casing.

Abstract: A linear motor having a more preferable braking function is realized with a low cost. A linear motor has a slider and a stator. A driving winding is wound around the slider. A plurality of permanent magnets forming magnetic poles which invert at a predetermined period are provided on a surface of the slider opposing the stator. Teeth are formed on the stator with a predetermined spacing therebetween. The stator extends to a region outside of an effective movable range, and a braking winding is wound around the teeth in the extended portion. When the slider moves into a region outside of the effective movable range, an induced voltage is generated in the braking winding and a current flows. A thrust in a direction opposite to the movement direction of the slider is generated by the current.

Abstract: An inductive energy harvester comprises a permanent magnet magnetic field source attached by a pair of compact spiral disk springs to an induction coil. The springs position the magnet so that the induction coil surrounds one end of the magnet where the flux density is greatest. In addition, the magnetic flux emerging from that end of the magnet is enhanced by a disk of magnetic material having high permeability and high flux density. In another embodiment, the magnetic field source comprises two dipole magnets arranged in opposing flux relationship with a thin layer of high flux density, high magnetic permeability material located in a gap between the magnets.

Abstract: A MEMS actuator includes a coil stack in the form of microfabricated, electrically conductive first and second superposed layers. A magnet array is superposed in magnetic communication with the coil stack, with first and second coils being selectively, electrically actuatable to generate relative movement between the coil stack and the magnet array both in-plane and out-of-plane. In various embodiments, a plurality of the actuators are integrally coupled to a microfabricated compliant mechanism to provide a high bandwidth, six degree of freedom nanopositioner.

Abstract: A tactile wave generating apparatus for generating amplified low frequency waves for transmission as tactile waves into a structure or a person's body. There is a housing in which is positioned a drive section that in turn comprises a magnet section that moves upwardly and downwardly as an inertial mass, two coils on opposite sides of the magnet and two flux path return plates for the coils. Each coil comprises upper and lower longitudinally aligned generally linear coil portions which drive the magnet section upwardly and downwardly. The magnet section is supported by upper and lower interconnecting sections that resiliently resist the up and down motion of the magnet section and restrain the magnet section to move up and down within close tolerances.

Abstract: The present invention discloses an electromagnetic electrical current generator (EECG) which comprises a hollow outer envelope having a side wall with a predetermined magnetic polarity distributed over its inner surface, one inner core free to move in said envelope characterized by the same magnetic polarity distributed over its outer surface, one conducting wire located in or on the outer envelope adapted to generate AC current, and a diode bridge interconnected to said conducting wire adapted to transform said AC current to DC current. A method for providing an EECG for generating electrical current is also disclosed.

Abstract: An electromechanical generator comprising an electromechanical device for converting mechanical vibrational energy into electrical energy, the electromechanical device comprising a housing, an electrically conductive coil fixedly mounted in the housing, a magnet assembly movably mounted in the housing for linear vibrational motion along an axis, the magnet assembly having a pair of opposed polar surfaces defining a gap therebetween, the coil being disposed in the gap, and a biasing device mounted between the housing and the magnet assembly, the biasing device biasing the magnet assembly in opposed directions along the axis towards a central position.

Abstract: An electric motor for a small-scale electrical appliance, such as a toothbrush or shaver. The electric motor includes at least one oscillatory motor component, a magnet arrangement having at least one permanent magnet, and a coil for generating a magnetic field which, in interaction with the magnet arrangement, generates a force for excitation of an oscillatory linear motion. During the interaction between the magnet arrangement and the magnetic field produced by the coil, a torque for excitation of an oscillatory rotational motion is additionally generated.

Abstract: A family of flexure suspension systems for reciprocating linear motors, especially voice coil type, wherein basic flexure span elements, each a flat spring or typically a stack thereof, are arranged in a folded flexure configuration to suspend a moving armature from a base in a compliant manner with a precise linear stroke path along a central axis. Typically two tiers of folded flexures suspend the armature, each tier having at least two array members, each a balanced quad or triad side-by-side row of span elements, disposed in a plane about the central axis in a polar/radial or rectangular pattern. Inherent overall balance and cancellation of unwanted forces acting on the system components achieve a consistent operating air gap, eliminate undesired torque imposed on the armature, coil, and entire mechanical assembly, and reduce mass and space requirements.

Abstract: [Object] To provide a vibration actuator capable of obtaining sufficiently sensible vibration with a flat, thin shape maintained. [Solving Means] Two magnets of a moving part are fixed in a direction where magnetic forces of the magnets are repulsed each other, and the moving part is disposed inside a coil of a fixed part in a housing, so that the moving part collides with the housing when an alternating current is applied to the coil. Therefore, vibration is transferred to the case through the collision. Accordingly, it is possible to implement a miniaturized vibration actuator capable of generating a sufficiently sensible vibration.

Abstract: A reciprocating power generating module is disclosed, which comprises: a guide; a magnet, being an integrated unit composed of at least two magnetic elements connected with each other in a manner that poles of any one of the plural magnetic elements are orientated to repel poles of its neighboring magnetic elements; and a coil, being wound around the guide; wherein the magnet is capable of being driven to move linearly by the defining of the guide. The full sine-wave AC voltage output is obtained when the relative linear motion equals double of the length of the magnetic element.

Abstract: This invention relates to a magnet assembly that includes a ferromagnetic member extending in a first direction, an array of magnetized poles of opposite polarity arranged adjacent to each other in the first direction and mounted on the ferromagnetic member, wherein a magnetized pole of the array of magnetized poles includes a plurality of permanent magnets arranged to generate a diverging magnetic field towards the ferromagnetic member. In the magnet assembly, each permanent magnet of the magnetized pole has a magnetic polarization having a non-zero component in the first direction and a non-zero component in a second direction substantially perpendicular to the first direction.

Abstract: An electromagnetic transducer includes a housing. At least one coil is associated with the housing. A spherical magnet within the housing is capable of turning in any direction and of moving along an axis. A first keeper and a second keeper are positioned on opposite sides of the magnet, both the first keeper and the second keeper including magnetically soft material and free to move along the axis. A first biasing member holds the first keeper along the axis, and a second biasing element that holds the second keeper along the axis. The first keeper and the second keeper are attracted by magnetic poles of the magnet in the absence of an external magnetic field, such that opposing magnetic poles of the magnet are aligned parallel to the axis. Alternating current flowing through the at least one coil causes a vibration of the magnet, the vibration transferred to the housing.

Abstract: A vibrator includes a voice coil and a vibrating member supported by first and second suspensions so as to be vibratory in the axial direction of the coil. Each of the first and second suspensions has an inner ring portion fixed to the vibrating member and an outer ring portion fixed to a casing of the vibrator. The inner and outer ring portions are connected through arcuate portions. Each arcuate portion has a first end connected to the inner ring portion and a second end connected to the outer ring portion. The arcuate portions of the first and second suspensions extend from the first end to the second end, respectively, in the same circumferential direction as seen from one side of the axial direction.

Abstract: A reciprocating compressor includes: a cylinder installed inside a casing and having a space therein; a piston disposed inside the cylinder; an inner stator fixed at an outer circumference of the cylinder; a magnet fixed at an outer circumference of the inner stator; and an outer stator disposed to maintain a certain distance from an outer circumference of the magnet. Accordingly, the number of components is reduced thus to reduce a manufacturing cost, and performance can be also improved.

Abstract: An electromagnetic generator comprising a multilayer assembly of a first layer carrying at least one magnet, a second layer carrying at least one coil, and a third layer carrying at least one magnet, the at least one magnet of the first and third layers being configured to define therebetween a region of magnetic flux in which the at least one coil is disposed, at least one of the layers being shaped to define a respective displaceable portion thereof which is displaceable by vibration of the electromagnetic generator thereby to cause relative movement between the coil and the magnets and generate an electrical current in the coil.

Abstract: To accurately tune the vibration frequency of a suspension during assembly. Secured positions 3e where a magnetic circuit part 2 is secured to a suspension 3 are provided near to each other. From among the secured positions 3e, secured positions 3e suitable for the characteristics of a suspension 3 to be mounted and the weight of a magnetic circuit part 2 are selected and secured to each other. Thus, the distance between the securing position and the central position of vibration of a suspension 3 and a housing 1 can be changed to tune the frequency to the desired value.

Abstract: According to one example a linear translation stage is provided. The linear stage includes a first portion (e.g., a base portion) and a second portion (e.g., a stage portion) configured for relative translation with respect to each other. One of the first portion or the second portion has a coil associated therewith and the other of the first portion or the second portion has a magnetic source associated therewith. The magnetic source may include one or more magnets to produce a magnetic field that generally encompasses the coil such that current through the coil causes a force on the coil, thereby causing translation of the first portion relative to the second portion.

Abstract: An electronic apparatus includes a power generator including a movable portion displaced by kinetic energy acting on an electronic apparatus body and a conversion portion converting displacement of the movable portion to electric energy, wherein the movable portion of the power generator is arranged on or below a gravity center of the electronic apparatus body in a state where the electronic apparatus body is supported in a used state.

Abstract: [Problem] To reduce the size, lower the cost and increase and flatten the thrust of an electromagnetic actuator in which a plunger moves reciprocally. [Solution] The electromagnetic actuator comprises a yoke 130, a coil 180 arranged around the yoke, an armature 120 slidably arranged inside the yoke and integrally formed with a plunger 110, and a return spring 150 for returning the armature to a rest position, wherein the yoke 130 has, in a predetermined position on the axial direction L, a thickness-reduced annular gap groove 133 over part of an outer peripheral face 131, the thickness-reduced portion having a trapezoidal cross section widening outwards.

Abstract: A driving device easy to manufacture. A slider formed of a soft magnetic material has spiral threads running along an axial direction of the slider. A stator formed of a soft magnetic material supports the slider movably along the axial direction. First and second coils fixed to the stator magnetize those portions of the spiral threads which are in first and second areas of the slider. Each of first and second magnets fixed to the stator has a magnetized surface thereof opposed to a corresponding one of the first and second areas and magnetized in a shape corresponding to a shape of the spiral threads.