Abstract: Disclosed herein is a motor driver circuit including a logic circuit that generates a second code which changes linearly with a slope “a” with respect to a first code based on a position command for a linear motor to be driven and that can switch the slope “a,” a D/A converter that converts the second code into an analog control signal, and a driver that drives the linear motor such that a current detection signal indicating a drive current of the linear motor approaches a target value that changes linearly with a slope “g” with respect to the control signal, the driver being configured to switch the slope “g.” The motor driver circuit is switchable between a first state in which g=g1 and a=a1 and a second state in which g=g2 (where |g2|>|g1|) and a=a2=a1×(g1/g2).

Abstract: An N-phase electric machine includes a movable member mounted so as to move with respect to a fixed member, a system for determining at least one item of information relating to the movement of the movable member and an electric power supply system which is managed by the item of information, the determination system comprising an encoder having a magnetic track, the fixed member having an armature equipped with at least one conductive coil per phase, the coils being magnetically coupled to the track, the armature having pads around which a coil is respectively arranged, each of the pads having teeth spaced apart by hollows so as to direct the magnetic flux between the coil and the encoder so that the supply of electric power to the coils causes the encoder to move and/or the movement of the encoder causes electric power to be supplied to the coils.

Abstract: A motor assembly comprising a mover assembly and a stator. The mover assembly comprising a plurality of mover assembly units, each unit comprising: a non-ferromagnetic core with a profile of an outer surface having at least two flat sections lying on intersecting planes; at least two ferromagnetic laminated structures arranged on the at least two flat sections of the non-ferromagnetic core, each ferromagnetic laminated structure includes a stack of ferromagnetic plates, each plate is covered with a non-conductive coating. Each ferromagnetic laminated structure is arranged on a corresponding flat section of the at least two flat sections of the non-ferromagnetic core such that side of each ferromagnetic plate is adjacent to the non-ferromagnetic core thereby making the ferromagnetic plates of the at least two ferromagnetic laminated structures lie on intersecting planes.

Abstract: Electromagnetic actuators are provided, which generate bidirectional linear force output without magnetic bias from current or permanent magnets. Systems and methods based on the electromagnetic actuators are also provided.

Abstract: A vibration apparatus comprising: a vibration assembly comprising a counterweight block, a first magnet group and an elastic member, the first magnet group is fixed on the counterweight block, the vibration assembly is suspended in the vibration apparatus through the elastic member; a stator assembly comprising a coil and a second magnet group, the second magnet group is installed in a winding hole of the coil; the first magnet group comprises at least two side magnets, magnetization directions of the two side magnets are perpendicular to a plane on which the coil is located, the side magnets are magnetized in opposite directions, a magnetization direction of the second magnet group is parallel to the plane, two poles of second magnet group are respectively attracted to poles of side magnets adjacent to the coil, the vibration assembly is configured to produce vibration relative to the stator assembly.

Abstract: The invention relates to a method and to an apparatus for vibration compensation in a piston compressor, the piston compressor of which is driven by means of a crankshaft by a three-phase motor controlled by a frequency converter, wherein the current position the crankshaft of the piston compressor is determined, and based on this the frequency converter, a torque (MM) for the three-phase motor is predetermined, which torque follows the load torque (ML) of the piston compressor in order to reduce the vibration stimulation of the entire piston compressor.

Abstract: A substrate transfer apparatus includes a planar motor provided in a transfer chamber and having coils arranged therein, a transfer unit movable on the planar motor, and a control unit configured to control an energization of the coils. The transfer unit includes two bases having magnets arranged thereon and configured to be movable on the planar motor, a substrate support member configured to support a substrate, and a link mechanism configured to connect the two bases and the substrate support member to each other.

Abstract: A linear motor includes: a mover including an output shaft portion extending in a direction of a thrust axis; a detection portion configured to be capable of detecting a position of the output shaft portion in the direction of the thrust axis; and a detected portion fixed to the mover, the mover further includes: a mounting base to which the detected portion is attached; and a metal fastening member that fastens the mounting base to an end surface, on one side in the direction of the thrust axis, of the output shaft portion, and the mounting base includes: a metal fastened portion sandwiched between the end surface, on the one side in the direction of the thrust axis, of the output shaft portion, and the fastening member; and a resin mounting portion having a mounting surface to which the detected portion is attached, the mounting surface being provided at a position off the thrust axis.

Abstract: A vibration motor, related to a technical field of motor disassembly and assembly, including a vibration motor, including a motor bottom housing, a motor surface housing, and a vibration assembly. The motor bottom housing includes mounting holes, the motor surface housing includes mounting columns, the mounting columns are respectively inserted into the mounting holes and are fixed to the motor bottom housing through hot melting, the motor surface housing is configured to seal an opening of the motor bottom housing, the vibration assembly is configured to provide vibration for the vibration motor in a single-axis direction, and the motor bottom housing and the motor surface housing are formed through injection molding.

Abstract: A vibration actuator includes: a movable body including: a disk-shaped magnet; a pair of disk-shaped cores fixed on front and rear surfaces of the disk-shaped magnet and each having an opening at a center thereof; a pair of leaf springs having a substantially circular shape; and a pair of spring stopper weight parts each having one end positioned by joining the opening to be joined with one of the disk-shaped cores and having another end connected to a central part of one of the leaf springs; and a fixing body including an annular coil and configured to support and accommodate therein the movable body such that the disk-shaped magnet, the disk-shaped cores and the spring stopper weight parts are capable of vibrating in an axial direction inside the annular coil.

Abstract: This specification describes a transducer configured to convert electrical signals into vibrational movement. The transducer comprises an axially-magnetised reciprocating magnet magnetically suspended between first and second axially-magnetised stationary magnets located on opposing sides of the axially-magnetised reciprocating magnet, wherein the axially-magnetised reciprocating magnet comprises an aperture such that the reciprocating magnet has an inner boundary and an outer boundary. The transducer further comprises at least two pairs of concentrically positioned electromagnetic solenoids, the at least two pairs of concentrically positioned electromagnetic solenoids being configured to drive the reciprocating magnet to reciprocate in a volume between the first and second axially-magnetised stationary magnets.

Abstract: A vibrating motor includes a stationary portion, and a movable portion capable of vibrating with respect to the stationary portion along a center axis extending in a vertical direction. The stationary portion includes a bearing portion which extends along the center axis and supports the movable portion to be able to vibrate along the center axis, and a coil including a conductive wire wound around the center axis. The bearing portion includes a first region including a coil inner region on a radially inner side of the coil.

Abstract: A vibrating motor includes a stationary portion, and a movable portion able to vibrate with respect to the stationary portion along a center axis extending in a vertical direction. The stationary portion includes a bearing portion which supports the movable portion to be able to vibrate along the center axis and has a tubular shape extending along the center axis, and a coil which directly or indirectly opposes at least a portion of the movable portion in a radial direction. A lower end portion of the bearing portion has a tubular shape extending along the center axis. A communication hole which penetrates in the vertical direction and allows an outside of the bearing portion and an inside of a portion above the lower end portion of the bearing portion to communicate with each other is provided on a radially inner side of the lower end portion.

Abstract: A linear translator device, including: a first body; a second body; and a plurality of actuators; wherein each actuator includes a first part first part mounted to the first body and a second part is mounted to the second body, the first part includes a front end and a back end, the second part is configured to extend and retract parallel to the direction of motion; wherein the plurality of actuators are arranged so that the extending or retracting direction of the second part of one of the plurality of actuators is offset, parallel and opposite to that of another one of the plurality of actuators; and wherein at least a portion of the first part of the one of the plurality of actuators overlaps with a portion of the first part of the other one of the plurality of actuators in the direction of motion space.

Abstract: A vibrating motor includes a stationary portion, and a movable portion able to vibrate with respect to the stationary portion along a center axis extending in a vertical direction. The stationary portion includes a bearing portion which supports the movable portion to be able to vibrate along the center axis and has a tubular shape extending along the center axis, a coil which directly opposes at least a portion of the movable portion in a radial direction, and a top surface portion which is above the movable portion and connected to the movable portion with an elastic portion therebetween. The bearing portion includes a first region which opposes the movable portion in the radial direction with a first gap therebetween, and a second region which is above the first region and opposes the movable portion in the radial direction with a second gap wider than the first gap therebetween.

Abstract: A permanent field magnet is disposed between two armatures parallel to each other, and includes a first field magnet section facing a first armature of the two armatures, and a second field magnet section facing a second armature of the two armatures that is different from the first armature. The first field magnet section includes a first main magnet that generates a magnetic field for the first armature and a first auxiliary magnet that increases magnetic flux of a magnetic pole of the first main magnet. The second field magnet section includes a second main magnet that generates a magnetic field for the second armature and a second auxiliary magnet that increases magnetic flux of a magnetic pole of the second main magnet. The first main magnet and the second main magnet, or the first auxiliary magnet and the second auxiliary magnet, are permanent magnets magnetized in the same direction.

Abstract: A drive unit for a gate valve controls a flow rate of fluid passing through an opening in a valve seat by forward and backward moving a valve plate against the opening in the valve seat. This drive unit includes a shaft connected to the valve plate, a linear motor for driving the shaft and drive control means to control the drive of the linear motor. The linear motor has a plurality of coils for generating a magnetic field by electric current and a permanent magnet assembly to react to the magnetic field generated by the plurality of coils. The plurality of coils forms a stator while the permanent magnet assembly is connected to the shaft and displaced together with the shaft to form a mover to forward and backward move the valve plate. Each of the plurality of coils is connected to its own control circuit and the drive control means individually controls the current flowing through each of the plurality of coils via the control circuit.

Abstract: The substrate transfer apparatus includes a planar motor provided in a transfer chamber and having coils arranged therein; a transfer unit movable on the planar motor; and a control unit configured to control an energization of the coils. The transfer unit includes two bases having magnets arranged thereon and configured to be movable on the planar motor, a substrate support member configured to support a substrate, and a link mechanism configured to connect the two bases and the substrate support member to each other.

Abstract: The present invention provides a control method of a driving apparatus that repeatedly performs a process of driving a target object in a predetermined range by a linear motor, wherein the linear motor includes a stator in which a plurality of coils are arrayed, and a mover provided with the target object, the control method comprising: changing a position of the stator with respect to the predetermined range at an arbitrary timing; and determining, in accordance with the changed position of the stator, output ratios of the plurality of coils in the process.

Abstract: A method for manufacturing a magnet module. The method may include injecting a magnet module including a plurality of magnetless magnets arranged in a straight line; and magnetizing the plurality of magnetless magnets mounted on the injected magnet module. The injecting of a magnet module may include mounting the plurality of magnetless magnets to a first part forming a frame of the magnet module in a mold frame including first and second mold frames molded inside to fit an external shape of the magnet module; injecting a resin in a liquid state into the mold frame; and separating the mold frame when the resin is hardened. The injecting of a magnet module may further include mounting a metal plate to a second part forming a base of the magnet module in the mold frame, before performing the step of injecting a resin in a liquid state into the mold frame.

Abstract: An electrical machine (1) operating by switching of magnetic flux comprises a first magnetic structure (10), a second magnetic structure (20) and a winding (30). The first and second magnetic structures are arranged movable relative to each other along a predetermined motion path (4) and have respective sections (12,22) interleaved with each other via more than 4 air gaps. The first magnetic structure presents at each air gap a variable magnetic permeability. The second magnetic structure presents at each air gap a variable magnetic permeability and/or permanent magnet poles. Magnetic periodicities of the first and second magnetic structures are equal. For each of the air gaps, most of the magnetic flux passes at each instant in the same direction. The winding has a respective loop (32) provided either around respective section in the direction of the predetermined motion path, or along respective section along an entire closed predetermined motion path.

Abstract: An electromagnetic inertial force generator is provided, which includes radially polarized permanent magnets providing bias flux across axial gaps to combine with axial coil flux to linearize flux output. An array of components is integrated into a single structure that is more compact and lighter than a monolithic force generator, providing the same level of performance while using less permanent magnet material.

Abstract: A vibration motor and a tactile device are provided. The vibration motor has: a stationary portion; a movable portion having a magnet and capable of vibrating with respect to the stationary portion along a central axis extending in an up-down direction; and an elastic member. The stationary portion has: a housing, disposed radially outside from the movable portion and having a cylindrical shape extending along the central axis; a top surface portion, disposed above the movable portion, fixed to the housing, and extended in a direction intersecting with the central axis; and a coil, capable of applying a driving force to the movable portion. The elastic member is disposed below the top surface portion and above the movable portion. The elastic member is fixed to both the top surface portion and the movable portion, and supports the movable portion so that the movable portion can vibrate along the central axis.

Abstract: A system includes an industrial automation component configured to receive a first voltage from a voltage source to enable the industrial automation component to perform one or more operations, a mechanical device configured to generate a second voltage, and a display configured to present image data. The display is configured to maintain presentation of the image data in absence of the first voltage received from the voltage source or the second voltage received from the mechanical device. The system also includes processing circuitry configured to use the second voltage generated by the mechanical device to adjust the image data presented by the display when the first voltage is unavailable.

Abstract: A vibration motor and a tactile device are provided. The vibration motor has: a stationary portion; a movable portion, capable of vibrating with respect to the stationary portion along a central axis extending in an up-down direction; and an elastic member. The stationary portion has: a case including a housing disposed radially outside from the movable portion and having a cylindrical shape extending along the central axis; and a coil, capable of applying a driving force to the movable portion. The movable portion has: a magnet, extending along the central axis; and a holder, disposed above the magnet. The holder has: an upper portion, extending in a direction intersecting with the central axis and disposed above an upper surface of the magnet; and a side surface portion, extending downward from a radial outer edge part of the upper portion and fixed to a radial outer side surface of the magnet.

Abstract: An LRA with a magnet assembly sandwiched between a pair of moving masses or support blocks which are further sandwiched between a pair of springs. A stationary elongated shaft extends through both the magnet assembly and the pair of moving masses and the pair of springs with two opposite ends secured to the corresponding end walls of the case in which all the magnet assembly, the pair of moving masses and the springs are disclosed. The moving mass forms a pair of recesses in opposite top and bottom surfaces. The case forms a pair of protrusions on opposite top and bottom walls to respectively received within the corresponding recesses so as to provide the reliable support upon the moving mass in a vertical direction. Each moving mass forms a protrusion to hold the corresponding spring in position.

Abstract: In a motor including an armature, and a field system having a main pole magnetized in first directions in which a distance from the armature is defined and a sub-pole adjacent to the main pole in second directions orthogonal to the first directions and magnetized in the second directions and forming a Halbach array, a first dimension of the main pole in the second directions, a second dimension of the main pole and the sub-pole in the first directions, and a third dimension as a sum of the dimensions of the main pole and the sub-pole in the second directions are determined according to a flux content generated in a surface of the field system at the armature side.

Abstract: A movable guard for safeguarding a machine, comprising: a protective cover for covering a working area of the machine; a counterweight; a connecting element for connecting the protective cover to the counterweight; a deflection element, which is configured to deflect the connecting element in such a way that the protective cover and the counterweight are movable in mutually opposite directions; and a drive, which acts on the counterweight in order to drive the counterweight.

Abstract: The invention relates to a linear motor for a sliding door, comprising a mover assembly, a stator assembly and a controller for controlling the mover assembly to move, the stator assembly is electrically connected with the controller, and comprises two or more stators; the controller is arranged between the two adjacent stators; and end parts of the stators on two sides of the controller are provided with Hall devices. The mover assembly can move on a left side and a right side of the controller, and the moving range is increased. Furthermore, the Hall devices are arranged at the end parts of the stators on the two sides of the controller, the moving range of the mover assembly to the left side and the right side can be further increased, so that the system can adapt to a wider door opening without changing the length of the stator assembly.

Abstract: A secondary part provides a magnetic path for a primary part of a linear motor and includes a spacer element as well as yoke plates forming two limbs, which are arranged for an attachment to the spacer element so that—situated opposite each other—they extend in planes parallel to the magnetic path. In addition, the secondary part includes a plurality of permanent magnets, which are fixed in place on inner sides of the yoke plates pointing toward the magnetic path. The permanent magnets each have a width that decreases in an extension direction perpendicular to the magnetic path.

Abstract: Embodiments described include a electrical linear motor comprising a stator and an actuation shaft movable in a linear axial direction with respect to the stator. The stator comprising a casing, an electromagnet array mounted in the casing. The electromagnet array comprising a central orifice extending in the linear axial direction within which the actuation shaft extends. The actuation shaft comprising a permanent magnet arrangement comprising a plurality of magnetic pole segments. The electromagnetic array comprising a plurality of electromagnets to generate a magnetic field that in conjunction with the magnetic field of the permanent magnet arrangement generates an electromotive force between the stator and actuation shaft having a component in the axial direction to drive the actuation shaft relative to the stator.

Abstract: A linear motor is provided, including a moving magnet assembly including (i) a magnet track, (ii) a first plurality of permanent magnets coupled to the magnet track, and (iii) a second plurality of permanent magnets coupled to the magnet track and arranged below the first plurality of permanent magnets. The linear motor also includes a first coil assembly arranged above the moving magnet assembly. The first coil assembly includes a first plurality of teeth having first slots therebetween and a first plurality of coils at least partially disposed in at least a portion of the first slots. The linear motor also includes a second coil assembly arranged below the moving magnet assembly. The second coil assembly includes a second plurality of teeth having second slots therebetween and a second plurality of coils at least partially disposed in at least a portion of the second slots.

Abstract: A transverse flux type linear motor and a linear compressor having the same include: a stator core in which a plurality of stator sheets are laminated along an axial direction; a winding coil provided in the stator core to form an alternating magnetic flux in a transverse direction perpendicular to the axial direction in the stator core; a plurality of magnets fixedly coupled to a radial side surface of the stator core to have different magnetic poles alternately arranged along the axial and circumferential directions; and an integral mover provided with a radial air gap with respect to the plurality of magnets to reciprocate in an axial direction with respect to the stator core by a magnetic force formed on the magnet.

Abstract: An electric linear motor, an elevator and a method for controlling rotation of a mover with respect to a stator beam are presented. The electric linear motor includes a number of stator beams, wherein at least one of the stator beams includes a plurality of stators extending in a longitudinal direction of the stator beam, a number of movers, wherein at least one of the movers includes a plurality of armatures, wherein each one of the armatures is adapted for establishing an electromagnetic coupling with a corresponding one of the stators for moving the mover along said stator, and wherein at least one of the armatures is arranged to be offset from the aligned position with respect to the corresponding one of the stators in a perpendicular direction relative to the longitudinal direction.

Abstract: A motor includes a plurality of ends, including a first end and an opposing second end, an outer surface of the magnetic carrier extends between the ends, and a plurality of magnetic poles including a first magnetic pole and a second magnetic pole, the plurality of magnetic poles disposed on the magnet carrier, extending between the ends, and being adjacent on the outer surface of the magnet carrier, wherein each of the plurality of poles comprising an array of magnets, each magnet in the array of magnets being a permanent magnet, each array of magnets comprising a plurality of magnets including a first magnet and a second magnet, the plurality of magnets differing from each other in one or more of material and magnetic field strength (MGOe), wherein the first plurality of magnets and the second plurality of magnets are adjacently disposed within the array of magnets.

Abstract: A movable core-type reciprocating motor and a reciprocating compressor having a movable core-type reciprocating motor are provided. The motor may include a stator including an inner stator and an outer stator; a magnet coil wound between the inner stator and the outer stator; a magnet fixed to at least one of the inner stator or the outer stator so as to be at least partially positioned within a range of the air gap; and a mover including a movable core disposed in the air gap and made of a magnetic material to perform a reciprocation movement with respect to the stator.

Abstract: A core-type linear motor includes: a stator extending in an axial direction, with magnets arranged at intervals in the axial direction, wherein each magnet and its spacing from an adjacent magnet constitute a magnet unit; and a rotor opposite the stator and linearly movable in the axial direction, with coil assemblies arranged side by side in the axial direction. Each coil assembly includes a core with an active portion wound with a coil and a supporting portion. Three coil assemblies have substantially the same length in the axial direction as four magnet units. When the length of each magnet unit is defined as 1, the length of each active portion is 0.3 to 0.5, and the height of each supporting portion, 0.28 to 0.38. These size ratios help increase the motor constant, lower the cogging force, and reduce positive attraction between the rotor and the stator.

Abstract: Provided is an impact type vibration actuator including a permanent magnet having a stopper insertion portion; a linear guide surrounding the permanent magnet; a stopper protruding into the linear guide and inserted into the stopper insertion portion; and coils provided on at least one end of the permanent magnet to provide alternately attraction and repulsion to the permanent magnet. According to the present invention, since a permanent magnet is not connected to the vibration mass, it is possible to adjust the vibration frequency in a very wide range by adjusting the frequency of the power source applied to the coil, and to adjust vibration intensity by appropriately selecting current intensity, a stopper interval, an elastic means, and the like. In addition, through this, it is possible to provide much more various haptic feedbacks than the prior art.

Abstract: A magnetic balance guided linear vibration motor comprising a housing (1, 2), a vibrator, and a stator fixedly connected with the housing. The vibrator comprises a counterweight (31) and a vibrating block embedded and fixed in the counterweight, wherein a pair of first balancing magnets (61a, 61b) are respectively arranged on vertical sidewalls at two ends of the counterweight, second balancing magnets (62a, 62b) corresponding to the first balancing magnets are respectively arranged on the housing at positions corresponding to the two ends of the counterweight, and the second balancing magnets and the corresponding first balancing magnets are attracted to each other. The vibration motor provides the vibrator with vibration balance in a motor vibration space, overcomes the problem of wearing, deformation and balance error and the like due to motor mechanical balance means, and reduces motor noise, thus increasing the product quality and stability of the motor.

Abstract: An actuator (202) includes a stick-shaped center yoke (1) inserted through a cylindrical outer yoke (10), a support member that supports the outer yoke (10) such that the outer yoke (10) is linearly movable in an axial direction of the center yoke (1), a first coil (2), a second coil (3), and a third coil (4) wound around the center yoke (1), a first magnet array (11) and a second magnet array (12) disposed on an inner periphery of the outer yoke (10) in such a manner as to face the first coil (2), the second coil (3), and the third coil (4), a flat base plate (13) disposed at a first end portion of the center yoke (1), and a heat radiation member touching the base plate (13).

Abstract: For a flexibly configurable and easily expandable transport route of a long stator linear motor with transport route modules, it is provided that, in a two-sided route section with a transport route module on both sides, an intermediate space is provided between two transport route modules in transverse direction, and the transport unit is arranged at least partially in this intermediate space. In this way, a movement path is formed midway of this intermediate space in transverse direction that the transport unit follows during movement in longitudinal direction by the guidance on the transport route modules, and the movement path is arranged by the arrangement of the transport route module in transverse direction at a distance of (r·a) from the starting point and ending point, where r is an odd, whole number.

Abstract: An R-T-B based sintered magnet includes a first main surface and a first side surface. The first main surface has a coercivity that is higher than that of the first side surface. ?HcjM?60 kA/m is satisfied, where ?HcjM is a difference in coercivity between a portion having a highest coercivity on the first main surface and a portion having a lowest coercivity on the first main surface. ?HcjG?60 kA/m is satisfied, where ?HcjG is a difference in coercivity between a portion having a highest coercivity on a first cross section and a portion having a lowest coercivity on the first cross section and the first cross section is a cross section parallel to the first main surface and spaced from the first main surface at a predetermined length or more.

Abstract: A reduction in thickness and a reduction in size in the width direction are enabled while enjoying the benefits of enabling stabilized vibration and superior physical shock durability through the provision of stationary shafts. The linear vibration motor comprises: a movable element that is equipped with a magnet portion and a weight portion; a frame for enclosing the movable element; a coil that is secured to the frame, for driving the magnet portion along the axial direction; an elastic member for applying, to the movable element, an elastic force for repelling the driving force that acts on the magnet portion; and a pair of guide shafts that is arranged along an axial direction, having one end secured to a frame and the other end supporting slidably the movable element.

Abstract: A primary for a linear induction motor having a core, electrical winding coils and a cooling system. The core extends longitudinally and has slots extending laterally in a first face thereof. Electrical winding coils inserted in the slots have end turns that extend laterally beyond each side of the core. The electrical winding coils are aligned sequentially along a length of the core. The cooling system, which is adapted to receive a cooling fluid, includes a serpentine tubing assembly and two lateral tubes. The serpentine tubing assembly is at least partially in contact with the core so as to transfer heat from the core to the environment. Each one of the two lateral tubes extend longitudinally along a different side of the core and within a respective longitudinal alignment of the end turns of the electrical winding coils.

Abstract: A linear motor system that includes a field system in which magnets are arrayed such that polarities are alternately different, armatures, a magnetic detector which includes first, second and third hall elements, and in which an electrical angle phase of the third hall element is shifted from that of the first hall element by 90° and an electrical angle phase of the second hall element is shifted from that of the first hall element by 180°, and a calculator which calculates a first electrical angle from outputs of the first and the third hall elements, calculates a second electrical angle from outputs of the second and the third hall elements, and calculates an estimated value of an electrical angle by weighting is provided. An electrical angle with a larger amplitude between the first and the second electrical angles is multiplied by a relatively larger coefficient value.

Abstract: In one embodiment of a wireless power transmitter, two coils are magnetically coupled together by placing both coils on a magnetic layer. A power circuit generates an AC signal of a defined voltage magnitude that causes a current to flow through the first coil, which generates a magnetic field having a first polarity. The second coil is coupled to the first coil. Current flows through the second coil and generates a magnetic field having a second polarity that is opposite from the first polarity. Because the magnetic field generated by each coil has a different polarity, the magnetic fields attract and form a strong magnetic field that flows from the first coil to the second coil. The strong magnetic field can transfer greater amounts of power to a receiver in comparison to coil configurations that emit magnetic fields in the same direction that repel one another.

Abstract: A magnet linear actuator includes a first element and an armature situated on a support, with the armature being movable along a movement axis between a first position engaged with the first element and the second position spaced away from the first element along the movement axis. The actuator further includes a biasing element that biases the armature in a direction generally toward the second position. The first element or the armature is pivotable with respect to the other between a first orientation and a second orientation. In the first orientation, the first element and the armature have a first magnetic attraction to one another that is sufficient to overcome the bias of the biasing element and to retain the armature in the first position. In the second orientation, the first element and the armature have either a magnetic repulsion to one another or a weaker second magnetic attraction.

Abstract: The present invention provides a linear motor where a load onto a supporting mechanism and the ripple of force are lessened and the ripple can be adjusted. As a leakage flux between the magnetic poles can be reduced by being configured by plural magnetic poles arranged with a magnet arranged on a mover held between them, a core that continuously connects the magnetic poles that holds the magnet of the mover between them, windings are integrally wound onto the plural magnetic poles and the mover formed by a row of magnets the magnetic poles of which are alternately arranged or a row of magnets the polarity of which is alternately arranged and magnetic materials, by arranging the plural magnetic poles arranged with the magnet held between and the plural magnetic poles provided with the core that continuously connects the magnetic poles.

Abstract: Provided is controlling apparatus for an electric motor which is driven in accordance with a driving signal input through electric contacts held in slide contact with each other, the controlling apparatus including: a superimposed signal generating unit, which generates a superimposed signal having a peak voltage higher than a voltage of the driving signal; and a controlling unit, which generates the driving signal based on a controlling signal input so as to control the driving of the electric motor, and superimposes the superimposed signal onto the driving signal and output the resultant signal to the electric motor, the controlling unit superimposing the superimposed signal onto the driving signal and outputting the resultant signal to the electric motor when a state in which the driving signal is lower than a predetermined voltage continues for a time period which is longer than a predetermined time period.

Abstract: A linear compressor and a linear motor for a linear compressor are provided. The linear motor may include a first stator, a second stator spaced apart from the first stator, and at least one permanent magnet disposed between the first stator and the second stator. The first stator may include a bobbin around which a coil may be wound, and a plurality of core blocks that surrounds the bobbin. In at least one core block of the plurality of core blocks, a distance between a first surface that faces the second stator and a second surface of the second stator that faces the first surface varies in a circumferential direction of the second stator.