Class / Patent application number | Description | Number of patent applications / Date published |
310120240 | Magnet or pole structure | 61 |
20090206682 | PRIMARY PART AND LINEAR ELECTRICAL MACHINE WITH FORCE RIPPLE COMPENSATION - A primary part of a linear electrical machine includes a first member for production of a first magnetic field, a second member for production of a second magnetic field. The first member and the second member are arranged to realize a superimposition of the first magnetic field with the second magnetic field. Arranged on at least one end face of the primary part is a flux-guiding element to reduce a force ripple. The flux-guiding element is constructed in the form of an end tooth module having at least one permanent magnet. | 08-20-2009 |
20090218892 | ELECTROMAGNETIC LINEAR MOTOR - An electromagnetic linear motor is proposed that features a longitudinal stator, a hollow body of the stator made of a magnetically soft material, a magnetic coil of the stator, a rotor in the stator that is movable linearly relative to the magnetic coil, an axially magnetized permanent magnet of the rotor and an axially variable shape or variable magnetic material properties of the stator. | 09-03-2009 |
20090218893 | LINEAR MOTOR MOUNTING STRUCTURE - The present invention provides a magnetic attractive force-offsetting linear motor which prevents motor thrust from varying due to changes in the position on a stator, thus enabling improvement of the motor thrust and of the accuracy of the machine tool and the quality of a processed surface. A magnetic attractive force offsetting linear motor has a base | 09-03-2009 |
20090224613 | Corrosion-resistant magnetic circuit and voice coil motor or actuator - Provided are a magnetic circuit capable of being manufactured inexpensively due to omission of formation of a corrosion-resistant metallic surface film as well as a voice coil motor or an actuator by utilizing the same. The magnetic circuit comprises yoke members prepared from a plate material of 0.1 mm to 5 mm thickness of a martensite-type, ferrite-type or precipitation-hardening stainless steel material or a Cr-based heat-resistant steel material containing 0.0001-1% (% by mass, the same hereinbelow) of C, 0.0001-5% of Si, 0.001-2% of Mn, 0.0001-0.1% of P, 0.0001-0.2% of S, 0.0001-5% of Al, 0.0001-0.1% of O, 0.0001-0.1% of N, 0.0001-1% of Ni and 10.5-30% of Cr together with at least one alloying element selected from Ti, Co, Cu, Zr, Nb, V, Mo, W, Ta and B as the additive elements in a total amount of 0.0001-5%, the balance being Fe. | 09-10-2009 |
20090322162 | LINEAR MOTOR WITH FORCE RIPPLE COMPENSATION - The invention relates to a primary part ( | 12-31-2009 |
20100038976 | DUAL LINEAR ELECTRODYNAMIC SYSTEM AND METHOD - An exemplary description provided for patent searches includes a linear electrodynamic system involving conversions between electrical power and mechanical motion uses unique magnet assemblies that move and unique stator assemblies and stator members shaped and oriented with respect to the moving magnet assemblies. | 02-18-2010 |
20100072831 | METHOD FOR CONSTRUCTING AN ELECTRICAL MACHINE AND TOOTH HALVES FOR A TOOTH OF AN ELECTRICAL MACHINE - In an electrical machine in which the primary part comprises coils and magnets, the coils being surrounded in each case by two tooth halves and the magnet being inserted in each case between said two tooth halves, provision is made according to the invention for an assembly in which the coil is prewound, the prewound coil is pushed onto two tooth halves, and the magnet is only then inserted. This is made possible by the provision of tooth halves which have a corresponding shape or can be converted into a corresponding shape by virtue of the removability of a tooth tip. | 03-25-2010 |
20100231059 | LAMINATED CORE OF AN ELECTRIC LINEAR MOTOR - The invention relates to a laminate stack ( | 09-16-2010 |
20110012440 | PERIODIC MAGNETIC FIELD GENERATION DEVICE, AND LINEAR MOTOR AND ROTARY MOTOR USING THE SAME - A periodic magnetic field generation device is provided with a field pole of a Halbach array structure in which main pole permanent magnets magnetized in a direction of a generated field and sub pole permanent magnets magnetized in a direction opposite to the direction of magnetic poles of the main pole permanent magnets are alternately disposed linearly or circularly so as to be adjacent to each other. A part of each of the main pole permanent magnets on a side on which the magnetic field is generated is replaced by a soft magnetic member, and a relation between a length A of the soft magnetic member on the side of the generated field along a moving direction and a length B of each main pole permanent magnet on a side of a back yoke along the moving direction is A01-20-2011 | |
20120098356 | LINEAR MOTOR, BACK YOKE FOR LINEAR MOTOR, AND MANUFACTURING METHOD OF BACK YOKE - A linear motor includes a slider unit having a magnet row in which plural permanent magnets are arranged in series so that the same poles are opposed to each other and moving in an arrangement direction of the magnet row by electromagnetic force, a stator unit in which the slider unit is inserted at an inner circumference side and electromagnetic coils for plural phases that receive supply of drive currents at different phases with respect to each phase are arranged along a movement direction of the slider unit, and a back yoke provided at an outer circumference side of the electromagnetic coils for plural phases in the stator unit, wherein plural slits along the movement direction of the slider unit for dividing a generation region of eddy currents into plural parts are formed in the back yoke. | 04-26-2012 |
20120175973 | CORELESS LINEAR MOTOR - A coreless linear motor includes a fixed member and a movable member. The fixed member has groups of permanent magnets arranged in a yoke. The movable member has a coil assembly. The groups of permanent magnets include first and second groups of permanent magnets arranged so as to face each other. Each of the first and second groups of permanent magnets has a plurality of magnets along a longitudinal direction of the yoke. In the plurality of magnets, magnetic poles of magnets facing along the longitudinal direction of the yoke alternate. Magnetic poles of the permanent magnets along the longitudinal direction of the yoke are the same. The coil assembly has at least three coils arranged movably relative to the first and second groups of permanent magnets along the longitudinal directions of the yoke between the first and second groups of permanent magnets. | 07-12-2012 |
20120228966 | ELECTRIC MOTOR AND PROCESS FOR MANUFACTURING A ROTOR OR A STATOR OF AN ELECTRIC MOTOR - An electric motor with a stator and a rotor, the stator and/or the rotor comprising a soft magnetic core comprising a lamination stack, is characterised, in that the lamination stack has a composition of 35% by weight≦Ni≦50% by weight, 0% by weight≦Co≦2% by weight, 0% by weight≦Mn≦1.0% by weight, 0% by weight≦Si≦0.5% by weight and 0.5% by weight≦Cr≦8% by weight and/or 0.5% by weight≦Mo≦8% by weight, residual iron and unavoidable impurities, where 0.5% by weight≦(Mo+Cr)≦8% by weight. | 09-13-2012 |
20120248898 | Moving Magnet Actuator Magnet Carrier - A magnet carrier for a moving magnet actuator. The magnet carrier includes a single longitudinal beam extending in the direction of intended motion of magnet carrier and two pairs of transverse ribs, extending from opposite sides of the longitudinal beam. The longitudinal beam and the two pairs of transverse ribs are arranged to engage a pair of substantially planar magnet structures. | 10-04-2012 |
20120280579 | LINEAR MOVING MAGNET MOTOR COGGING FORCE RIPPLE REDUCING - A magnet structure for a linear motor. Magnet tiles of the magnet structure are arranged so that intra-pole tile gaps extend in a direction parallel to the direction of motion of the linear motor. | 11-08-2012 |
20120286592 | Permanent Magnet Operating Machine - A magnet machine may translate or rotate with one element stationary and another element moving. One element has mounted thereon a plurality of magnets arranged in a sequenced array extensive in the direction of operation, the magnets fixed with N-pole magnet faces opposing S-pole magnet faces across gaps between the magnets, and side faces arranged in a plane. A second element has a single or integrated magnet mounted with one pole face positioned parallel to, and gapped apart from the plane of the plurality of magnets. This pole face is disrupted by an array of spaced apart grooves. The direction of motion is in the plane. A solenoid may be mounted within one or more of the grooves so provide a staring force or a braking force to the moving element. | 11-15-2012 |
20120299398 | MOTOR, DESIGN METHOD AND MANUFACTURING METHOD OF MOTOR, STAGE DEVICE, AND EXPOSURE APPARATUS - A distribution of an element to improve coercivity for each magnet is decided, based on analysis results of magnetic fields within a plurality of magnets (M | 11-29-2012 |
20120313458 | Ironless Electrical Machines with Eddy Current Reducer - The invention provides ironless electrical machines with reducer of Eddy current losses (Eddy current reducer) that improves the performance of machine. In the electromechanical systems with ironless electrical machines, it greatly reduces the Eddy current losses in moving conductive part from stationary permanent magnets (or in stationary conductive part from moving magnets). | 12-13-2012 |
20120326533 | LINEAR MOTOR WITH BACK YOKE - Provided herein is a linear motor in which a back yoke can readily be mounted onto a linear motor body. The linear motor body is surrounded or wrapped by the back yoke that works to form part of a magnetic circuit of the linear motor body. The back yoke assembly includes first and second divided assemblies. The first and second divided assemblies have the same dimension and shape, and are each formed by press working a silicon steel plate or a magnetic plate made of SPCC material. | 12-27-2012 |
20130049490 | MAGNETIC PLATE HAVING WOVEN CLOTH, LINEAR MOTOR HAVING THE MAGNETIC PLATE, AND METHOD OF MANUFACTURING THE MAGNETIC PLATE - A magnetic plate for a linear motor, a linear motor having the magnetic plate, and a method of manufacturing the magnetic plate, wherein the strength of a portion where the thickness of a resin layer is small is improved, while maintaining desired thrust force of the motor. A woven cloth such as a glass woven cloth or a carbon fiber woven cloth is attached on a surface of a plurality of permanent magnets, wherein N-poles and S-poles of the permanent magnets are alternately positioned. Then, a resin protecting layer is formed on the woven cloth by resin molding. | 02-28-2013 |
20130082545 | Linear Motor - To provide a linear motor including a mover having an excellent magnetic characteristic even if rigidity is improved, can reduce an amount of magnets, and has high rigidity and less easily bends.
| 04-04-2013 |
20130154398 | LINEAR MOTOR - A linear motor is provided. The linear motor includes a first member including a plurality of armature modules each comprising a magnetic core, a plurality of salient poles, and coils, where the coils are wound around a portion or all of the salient poles or the magnetic core between the salient poles; and a second member including one or more permanent magnet modules each including a plurality of permanent magnets each projected toward the magnetic core to be arranged between two salient poles of the armature module, where poles of the permanent magnets are alternated in a moving direction of the linear motor. Power is supplied to the coil of each armature module such that a thrust according to a traveling magnet fie is generated by using as one unit an S number of armature modules and a P number of permanent magnets arranged in the moving direction. | 06-20-2013 |
20140084709 | STRIP STATOR - A strip stator including: a strip stator core; a plurality of upper end insulation groups; and a plurality of lower end insulation groups. The stator core includes two ends. Each upper end insulation group includes at least two upper end insulations connected together by injection molding. Each lower end insulation group includes at least two lower end insulations connected together by injection molding. The upper end insulation groups and the lower end insulation groups are arranged on the two ends of the strip stator core, respectively. | 03-27-2014 |
20140159512 | STATOR STRUCTURE - A stator structure includes a main body having multiple frames each having an arc panel, a main tooth, at least one secondary tooth, at least one main coil and at least one secondary coil. The main tooth and the secondary tooth are disposed at one face of the arc panel. The main coil is installed at the main tooth, and the secondary coil is installed at the secondary coil. A rotor is penetrated through the stator structure. The frames are in a multi-layer circular arrangement at the rotor, and a dislocation angle exists between the frame at any layer and the frame at the neighboring layer. | 06-12-2014 |
20140265647 | ELECTROMAGNETIC DEVICE HAVING DISCRETE WIRES - An electromagnetic device includes discrete wires for its poles or teeth. In another aspect, an electromagnetic device includes a stator unit and an adjacent movable unit, at least one of which includes magnetic flux-carrying poles, with a majority of each pole including multiple discrete wires. In another aspect, the movable unit is an electric motor rotor, a linear electric motor armature, a solenoid armature, or an electric generator rotor. | 09-18-2014 |
20140300213 | Self-Centering Electromagnetic Transducers - Self-centering electromagnetic transducers, such as linear motors and generators, are disclosed. In one embodiment, an electromagnetic transducer includes an outer yoke made of a ferromagnetic material, and a coil assembly including a plurality of loops of electrically conductive wire, wherein the coil assembly is substantially surrounded by the outer yoke. The electromagnetic transducer further includes a magnet, and an inner yoke made of ferromagnetic material. The magnet is disposed within the outer yoke such that the coil assembly surrounds the magnet. The inner yoke is disposed within the magnet, and the magnet is free to translate. The electromagnetic transducer further includes at least one high-reluctance zone positioned within the outer yoke and/or the inner yoke. In some embodiments, the electromagnetic transducer includes one or more actuators that vary a width of one or more high-reluctance zones to change a spring rate of the electromagnetic transducer. | 10-09-2014 |
20140319935 | MOVER AND STATOR ASSEMBLY OF ELECTRIC MACHINE - A mover and stator assembly of an electric machine includes at least one stator and at least one rotor. Each stator includes multiple magnetic components each including a first surface and a salient portion protruding from the first surface. The rotor includes multiple second magnetic components each including a second surface and a groove located on the second surface. The first surfaces face the second surfaces, and the width of each salient portion is less than that of each groove. | 10-30-2014 |
20150357896 | LINEAR MOTOR - A linear motor includes a mover movable in a first direction and a stator. A yoke includes a pair of back yokes provided opposite to each other so as to sandwich the mover in a second direction perpendicular to the first direction. A plurality of field magnets are provided on an inner lateral surface of each of the pair of back yokes in the first direction. A pair of auxiliary magnets are provided (i) on end lateral surfaces of the back yokes and (ii) in the vicinity of the field magnets at the extreme end provided in the back yoke. A magnetic member is provided to surround the pair of auxiliary magnets. | 12-10-2015 |
20160118872 | LINEAR MOTOR - A linear motor includes a stator and a rotor. The stator has a first plate, a second plate, and a plurality of permanent magnets mounted on the first plate and the second plate. The rotor has a main body positioned between the first plate and the second plate, a plurality of electric coils received in the main body, and one or more cover plates. The main body includes a first outer surface facing the first plate, and a second outer surface facing the second plate. A flow passage is defined in at least one of the first outer surface and the second outer surface, and at least one of the one or more cover plates is mounted on one of the first outer surface and the second outer surface covering the flow passage. Cooling fluid is flowable through the flow passage. | 04-28-2016 |
310120250 | Size, spacing or orientation (e.g., tilted) | 16 |
20090256428 | Linear Motor with Force Ripple Compensation - The invention relates to a primary component ( | 10-15-2009 |
20090302692 | LINEAR MOTOR - When a pitch between centers of two adjacent magnetic pole portions disposed on an armature is defined as τs, the length W of permanent magnets disposed in the middle is equal to the pitch τs (W=τs). The length of each of the two end permanent magnets respectively disposed at either end of a permanent magnet magnetic pole row is denoted by W | 12-10-2009 |
20100013327 | ELECTRICAL MACHINE WITH NONUNIFORM POLE TEETH - Electric machines which are excited with permanent magnets are to be improved in terms of their smoothness of operation and their loss properties. For this purpose, an electric machine is proposed comprising a first active part ( | 01-21-2010 |
20100052437 | Linear Motor With Patterned Magnet Arrays - An armature for a linear motor is described. The armature includes a first of a pair of magnetic structures comprising a first plurality of maglettes each having a magnetic polarity vector; an angle between two adjacent magnetic polarity vectors in the first plurality of maglettes having a first magnitude; and a second of the pair of magnetic structures comprising a second plurality of maglettes each having a magnetic polarity vector; an angle between two adjacent magnetic polarity vectors in the second plurality of maglettes having a second magnitude, the first plurality of maglettes including a first outer maglette that is adjacent to a second outer maglette of the second plurality of maglettes, an angle between the magnetic polarity vectors of the first and second outer maglettes having a third magnitude that is different than at least one of the first and the second magnitudes. | 03-04-2010 |
20100176663 | SORTING SYSTEM WITH LINEAR SYNCHRONOUS MOTOR DRIVE - The present invention relates to a sorting system including a conveyor comprising a plurality of carts for carrying articles, in particular for sorting articles such as parcels and baggage. The conveyor has a linear synchronous motor drive system with stators arranged along a track which the carts follow. Reaction elements are mounted on each of the carts. The reaction elements each comprise an even or an uneven number of permanent magnets arranged on a plate-like carrier. The magnets on reaction elements of adjacent carts are arranged to form arrow of magnets with alternating polarity, said row having two neighbouring magnets. At least one of the two neighbouring magnets has a reduced dimension in the transport direction, and the two neighbouring magnets are situated at a transition between adjacent carts. | 07-15-2010 |
20100207464 | LINEAR MOTOR AND LINEAR MOTOR COGGING REDUCTION METHOD - Provided is a linear motor capable of reducing cogging. | 08-19-2010 |
20100308669 | STATOR MECHANISM OF LINEAR MOTOR - A stator mechanism of linear motor. The stator mechanism includes multiple magnetic members. The magnetic members are sequentially arranged along a predetermined straight line with the magnetic poles of the same polarity adjacent to each other to repel each other. Each magnetic member includes at least two magnetic bodies, which are coaxially arranged with the magnetic poles of different polarities adjacent to each other to attract each other. | 12-09-2010 |
20110198945 | LINEAR ACTUATOR - A linear actuator, wherein a permanent magnet is reliably prevented from being damaged. In a first linear actuator, the width of a gap between a first contact section and a second contact section in a radial direction or the width of a gap between the first contact section and the second contact section in a rotating direction is less than the width of a gap between a permanent magnet and a magnetic pole section. In a second linear actuator, a flat plate-like permanent magnet is provided in that one of a movable section and a stationary section which is provided with a coil for generating a magnetic flux for reciprocating the movable section, and that surface of the other which is opposed to the permanent magnet and functions as a magnetic pole surface is formed flat. In a third linear actuator, each of an engaging projection and a cutout is provided so as to be oriented in the direction in which the magnetic force of the permanent magnet acts on the magnetic pole section. At least a portion of the cutout is notched in the direction in which the magnetic force of the permanent magnet acts on the magnetic pole section. | 08-18-2011 |
20110221283 | MOVER, ARMATURE, AND LINEAR MOTOR - A mover configured such that a plate-like magnet magnetized in one longitudinal direction, a soft magnetic element, a plate-like magnet magnetized in the other longitudinal direction, and the soft magnetic element are alternately stacked in the order mentioned above continuously is passed through an armature having a configuration in which a first subunit having core portions extending from a yoke portion in a thickness direction of the mover and a second subunit having core portions extending from a yoke portion in a width direction of the mover are alternately disposed to thereby constitute a linear motor. Windings and are collectively wound around the core portions of the second subunit. | 09-15-2011 |
20110248579 | LINEAR MOTOR - A linear motor including magnetic-pole teeth which pinch and hold permanent magnets deployed in a displacer, a plurality of iron cores used for continuously connecting the magnetic-pole teeth, windings wound around the plurality of iron cores in batch, and the displacer in which positive and negative magnetic poles of the permanent magnets are arranged alternately. A plurality of magnetic poles including the magnetic-pole teeth and the iron cores are deployed along a longitudinal direction of the displacer. The windings which are common to the plurality of magnetic poles are deployed on the iron cores. The leakage magnetic flux between the adjacent magnetic poles is reduced by making polarities of the plurality of deployed magnetic poles one and the same polarity. | 10-13-2011 |
20110254386 | POWER GENERATOR WITH HIGH POWER-TO-VOLUME RATIO - A power generator with high power-to-volume ratio includes a plurality of silicon steel plates and air gaps or plastic plates, which are alternately arranged to form adjacent magnetic paths of a stator and a mover or a rotor of a power generator and which have intervals (which are defined by thickness or width of the silicon steel plates or the air gaps or the plastic plates) that are set to be very small, whereby when the mover or the rotor take a movement or rotation by one interval, magnetic flux induced in a magnetic path of the stator around which an induction coil is wound changes magnitude and direction thereof so that through quick changes, the induction coil induces a higher voltage and thus significantly increases power-to-volume ratio of the generator. | 10-20-2011 |
20110278958 | MOVER AND LINEAR MOTOR - A mover, in which at each outer surface of a cornered tubular inner yoke, a flat plate magnet magnetized from inside to outside in a direction perpendicular to the outer surface, a flat plate magnet magnetized in an axial direction of the inner yoke, a flat plate magnet magnetized from outside to inside in the direction perpendicular to the outer surface, and a flat plate magnet magnetized in the axial direction of the inner yoke are alternately provided in this order, is passed through an armature in which a first single pole unit and a second single pole unit rotated by 90° with respect to the first single pole unit are alternately stacked, thus forming a linear motor. Windings are collectively wound around core portions of the first single pole unit. Positions of the magnets provided at the outer surfaces of the inner yoke are deviated from each other. | 11-17-2011 |
20130002052 | MAGNETIC STATOR ASSEMBLY - An electric device including: a stator assembly; and an actuator including a coil having an axis, wherein the stator assembly includes: a stator core arranged along a linear axis, the stator core made up of a plurality of magnets each characterized by a magnetic moment, the plurality of magnets arranged in a stack along the linear axis with the magnet moments of the plurality of magnets being co-linearly aligned parallel to the linear axis, wherein the plurality of magnets includes a first magnet and a second magnet positioned adjacent to each other in the stack separated by a gap and with their magnetic moments in opposition to each other, and wherein the actuator is arranged on the stator core with the coil of the actuator encircling the linear axis with the axis of the coil parallel to the linear axis. | 01-03-2013 |
20130334901 | IRONLESS ELECTRICAL MACHINES WITH INTERNAL WATER COOLED WINDING BETWEEN TWO MAGNET ROWS - The invention provides ironless electrical machines with internal water cooled winding between two magnet rows. The winding with internal water cooling has very high heat dissipation and continuous force. In the invented construction (the water cooling plate inside the winding between two rows of magnets), Eddy currents are low due to opposite magnetization direction of the magnets in the rows. | 12-19-2013 |
20140091645 | LINEAR ACTUATOR - A linear actuator includes an inner core, and an outer core that is provided outside the inner core in a radial direction while being supported by a pair of flat springs. Permanent magnets are formed at one of the inner core and the outer core, and magnetic pole portions are formed at the other of the inner core and the outer core to face the permanent magnet with predetermined gaps formed therebetween. Spacers are respectively provided between the inner core and the flat springs, abutting portions are respectively configured by abutting facing surfaces of the spacers and the inner core and facing surfaces of the spacers and the flat springs adjacent to the spacers in the axial direction, and a plurality of engagement portions including recesses and protrusions are arranged at the abutting portions. | 04-03-2014 |
20160126820 | LINEAR MOTOR WITH REDUCED COGGING FORCE - A linear motor includes a plurality of magnets arranged at equal intervals, and an armature arranged opposite to the magnets and including an armature core having a plurality of teeth extending toward the magnets. The teeth include a first tooth located at one end in the thrust direction and a second tooth located at the other end on the opposite side. The first tooth and the second tooth have different dimensions or shapes so as to reduce cogging force generated due to the structure of the armature core at the ends in the thrust direction. | 05-05-2016 |
310120260 | Shape | 17 |
20090315413 | MOTOR APPARATUS, MANUFACTURING METHOD, EXPOSURE APPARATUS, AND DEVICE FABRICATION METHOD - The present invention provides a motor apparatus which includes a movable portion including a coil and a tooth-like salient pole, and a platen opposed to the movable portion, and moves the movable portion and the platen relative to each other by using a magnetic field generated by supplying a current to the coil, wherein the platen includes a base material having a surface on which convex portions and first concave portions are periodically arranged, a first thermally sprayed layer formed on the surface of the base material by thermal spraying such that second concave portions are formed inside the first concave portions, and a resin filled in the second concave portions. | 12-24-2009 |
20100127580 | MOTOR FOR OPTICAL SYSTEMS - A motor for optical systems, for example endoscopes, has a stator with two permanent magnets having poles which are disposed in the same direction and are magnetically interconnected by a flux return element. A coil is disposed between the magnets. Laterally of each magnet, a pole shoe is also magnetically coupled with the flux return element. A slider of the motor includes a yoke of a soft magnetic material, which yoke is in magnetic engagement with the permanent magnets of the stator. When the coil is excited with a current, the slider can be displaced from its rest position along a longitudinal direction. | 05-27-2010 |
20100201210 | LINEAR MOTOR - A linear motor includes a stator having field poles arranged linearly with opposing polarities arranged in an alternating manner; and a rotor having an armature core with teeth that faces a pole face of the field poles with a gap, and coils wound around the teeth. The stator and the rotor are supported in a slidable manner, a direction perpendicular to a sliding direction of the rotor and in parallel with the pole face is defined as a stacking direction. A head of each of the teeth has an extended portion extended in the sliding direction. At least heads of the teeth arranged at both ends of the armature core along the sliding direction is divided into a plurality of areas along the stacking direction. At least one of extended portions arranged on adjacent areas is extended by a different length along the sliding direction. | 08-12-2010 |
20100225179 | LINEAR MOTOR WITH REDUCED COGGING - A linear motor is provided including a magnet track including a plurality of permanent magnets, and a coil assembly including a plurality of laminations. The coil assembly defines a plurality of teeth having slots therebetween. The plurality of teeth include (1) two end teeth and (2) at least one non-end tooth arranged between the two end teeth. Each of the two end teeth defines an end profile including a first surface and a second surface. The first surface and the second surface are separated by a step which is substantially perpendicular to a plane defined by the plurality of magnets. The linear motor also includes a plurality of coils at least partially disposed in at least a portion of the slots defined by the plurality of teeth. | 09-09-2010 |
20100225180 | LINEAR MOTOR - There had been a problem that the installation area of a linear motor becomes large when a plurality of linear motors are arranged in parallel in the travel direction of a mover. | 09-09-2010 |
20110221284 | LINEAR MOTOR - The disclosure discloses a linear motor comprising: a field system in which a plurality of permanent magnets are linearly arranged: and an armature configured to face said field system and to have an armature core provided with armature windings, said linear motor running along a predetermined direction of travel with either said field system or said armature serving as a mover and the other serving as a stator, wherein: said armature core comprises: auxiliary teeth that are respectively provided on both ends along said direction of travel and around which said armature windings are not wound; and a plurality of main teeth that are provided between said auxiliary teeth, and each of said auxiliary teeth comprises an end portion shape in which a dimension in a teeth height direction orthogonal to said direction of travel is variable along said direction of travel. | 09-15-2011 |
20120175974 | COMPACT ELECTROMECHANICAL MECHANISM AND DEVICES INCORPORATING THE SAME - An improvement on the compact electromechanical mechanism of patent application Ser. No. 29/364,177 composed of a divergent flux path electromagnetic device includes dual magnetic flux paths from a radially poled permanent magnet along parallel and coaxially pole pieces so as the magnetic flux is diverted in a single direction by a pair of control coils wound coaxially on each magnet flux path about the center pole piece and adjacent to the radially poled permanent magnet. The control coils may be energized in a variety of ways to achieved desirable linear or bi-linear motion for various linear motion and linear reciprocating devices. | 07-12-2012 |
20120187779 | LINEAR MOTOR - A linear motor comprises a first member including armature modules, a second member including permanent magnet modules, and a supporting mechanism. Each armature module has at least four salient poles projected from a magnetic body to the second member and coils winding round the salient poles, through which a single-phase current flows. Each permanent magnet module has as many permanent magnets as the number of the salient poles included in each armature module. Currents having a predetermined phase difference are applied to the armature modules such that a thrust according to a traveling magnetic field is generated in a unit composed of S armature modules and P (P is a multiple of 2) permanent magnet modules arranged in a moving direction. A stator corresponding to one of the first and second members is fixed to the supporting mechanism such that a mover corresponding to the other moves by the thrust. | 07-26-2012 |
20120248899 | Moving Magnet Actuator Magnet Carrier - A magnet carrier for a moving magnet actuator. The magnet carrier includes a single longitudinal beam extending in the direction of intended motion of magnet carrier and two pairs of transverse ribs, extending from opposite sides of the longitudinal beam. The longitudinal beam and the two pairs of transverse ribs are arranged to engage a pair of substantially planar magnets. The single longitudinal beam and the two pairs of transverse ribs each comprise a lip for engaging a chamfered edge of a pair of substantially planar magnets so that the lip opposes motion of the magnets in a direction perpendicular to the plane of the magnets. The longitudinal beam and the transverse ribs are adhered to the magnets by an adhesive with an elastic modulus of less than 5 MPa and a tensile strain of greater than 100%. | 10-04-2012 |
20120326534 | ELECTRICAL ACTUATORS WITH GROOVED TABLE TOP OR HOUSING - The invention provides electrical actuators with grooved table top or housing (grooved actuators). In the invented electrical actuators, the Eddy current losses in moving conductive part from stationary permanent magnets (or in stationary conductive part from moving magnets) are reduced due to grooves. | 12-27-2012 |
20130002053 | SLOTLESS MOTORS WITH GROOVED CORE - The invention provides slotless electrical motors with grooved core (grooved motors). The motors with grooved core are much easier in production than conventional motors with laminated core. Also, they do not have significant Eddy currents losses due to grooves. | 01-03-2013 |
20130015725 | Linear Drive Motor With Improved Bearing System - A primary for a linear drive motor has first and second stacks, each with inner and outer teeth and a bearing mount. A magnet is disposed between the first and second stacks, and a coil wrapped is between the first and second stacks. A bearing is operatively mounted to at least one of the bearing mounts of the first and second stacks. The outer teeth of the first and second stacks may have a projection comprising the bearing mount. The bearing mount may be embedded within the stacks. The stacks may be assembled in a housing and the housing may have a first bearing outboard of the first stack, a second bearing outboard of the second stack, and a third bearing in staggered relationship with the first and second bearings across the housing in an arrangement bilaterally symmetric about an axis transverse to the direction of travel. | 01-17-2013 |
20130015726 | Primary for Linear Drive Motor with Solid Steel Stacks - A primary for a linear drive motor has a stage with stacks made from solid steel. Each stack has inner and outer teeth made that form a generally u-shaped cross-section for the stack. A magnet is disposed between the first and second stacks and a a coil wrapped between the first and second stacks. The stacks may be placed in a housing or may be formed as a housingless stage. The stacks and/or housing may be modified to selectively skew motor alignment to reduce motor cogging. The stacks may be contoured to follow various secondary forms. The stack inner and outer teeth lengths may be adjusted to help balance or optimize the magnetic circuit, to increase tooth surface area for increasing force, to allow more motor windings in the coil of the stack assembly, and to help locate the magnet and coil near the tooth surface. | 01-17-2013 |
20130076160 | STATOR CORE AND STATOR - The present invention provides a stator core and a stator for a cylinder linear motor at low cost, in which slot pitches can be determined accurately. A stator core for use in a cylinder linear motor has a positioning rod | 03-28-2013 |
20130106203 | MOVABLE IRON CORE LINEAR ACTUATOR | 05-02-2013 |
20130270928 | STATOR FOR A MODULATED POLE MACHINE - A stator core section for a stator of a modulated pole machine, the modulated pole machine including the stator, a moving device, and an active gap between respective interface surfaces of the moving device and the stator for communicating magnetic flux between the stator and the moving device, the moving device being adapted to move relative to the stator in a direction of motion, wherein the stator core section includes a stator core back from which a plurality of teeth extend, each tooth extending in a respective first direction defining a direction towards the rotor, the teeth being arranged along a second direction defining the direction of motion, each tooth having at least one side wall facing a neighbouring tooth and an interface surface facing the active gap, the interface surface and the side wall forming an edge connecting the interface surface and the side wall. | 10-17-2013 |
20150137626 | PERMANENT MAGNET POWER GENERATING DEVICE - A permanent magnet power generating device comprises a first soft magnetic body ( | 05-21-2015 |