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Linear

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310 - Electrical generator or motor structure

310010000 - DYNAMOELECTRIC

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Class / Patent application numberDescriptionNumber of patent applications / Date published
310014000 Solenoid and core type 15
310013000 Fixed and movable wound elements 5
20100117461ELECTROMOTIVE MACHINES - An electromotive machine (05-13-2010
20090140583Synchronous Linear Motor - The invention relates to a synchronous linear motor comprising a mobile primary part (06-04-2009
20090243403RECOILLESS VOICE COIL ACTUATOR AND METHOD - A recoilless voice coil actuator and method having flexures connected to both the magnet and the voice coil allowing independent movement of both the magnet and the voice coil in the direction of actuation. The stiffness or resistance to movement of the flexures is selected so that the natural frequencies of the magnet and the voice coil along the direction of actuation are substantially the same.10-01-2009
20090015078Mover for a Linear Motor - A mover for a linear motor comprises a body. The body includes at least more than one engaging elements, at least more than one connecting element, at least more than one engaging portion and at least more than one connecting portion. With the engaging elements, connecting elements, engaging portions and connecting portions of the body, multiple movers can be connected with each other and perform the actuating action by cooperating with the stator, thus not only increasing the push force by achieving a continuous electric current multiplication of the linear motor, but also reducing the development cost of the mover, and achieving the high availability that the quantity of the movers can be increased or decreased according to the requirements of the client.01-15-2009
20090072635LINEAR MOTOR GEOMETRY FOR USE WITH PERSISTENT CURRENT MAGNETS - An electrically powered launcher is disclosed that can accelerate small payloads to orbital velocities. The invention uses a novel geometry to overcome limitations of other design, and allows full exploitation of existing superconducting materials.03-19-2009
20100117461ELECTROMOTIVE MACHINES - An electromotive machine (05-13-2010
20090140583Synchronous Linear Motor - The invention relates to a synchronous linear motor comprising a mobile primary part (06-04-2009
20090243403RECOILLESS VOICE COIL ACTUATOR AND METHOD - A recoilless voice coil actuator and method having flexures connected to both the magnet and the voice coil allowing independent movement of both the magnet and the voice coil in the direction of actuation. The stiffness or resistance to movement of the flexures is selected so that the natural frequencies of the magnet and the voice coil along the direction of actuation are substantially the same.10-01-2009
20090015078Mover for a Linear Motor - A mover for a linear motor comprises a body. The body includes at least more than one engaging elements, at least more than one connecting element, at least more than one engaging portion and at least more than one connecting portion. With the engaging elements, connecting elements, engaging portions and connecting portions of the body, multiple movers can be connected with each other and perform the actuating action by cooperating with the stator, thus not only increasing the push force by achieving a continuous electric current multiplication of the linear motor, but also reducing the development cost of the mover, and achieving the high availability that the quantity of the movers can be increased or decreased according to the requirements of the client.01-15-2009
20090072635LINEAR MOTOR GEOMETRY FOR USE WITH PERSISTENT CURRENT MAGNETS - An electrically powered launcher is disclosed that can accelerate small payloads to orbital velocities. The invention uses a novel geometry to overcome limitations of other design, and allows full exploitation of existing superconducting materials.03-19-2009
Entries
DocumentTitleDate
20090066168VERTICAL ACTUATOR HAVING A GRAVITY COMPENSATION DEVICE - A vertical actuator has a stationary part that includes an upper part made of magnetic material which is magnetically separated from a yoke which bears a coil. The upper magnetic part generates an overall reluctance force on the movable part of the actuator which, over the entire functional range of the actuator, is slightly greater than the gravitational force. When the coil is not energized, the movable part has a position of stable equilibrium which is in the upper section of this functional range.03-12-2009
20090152958VACUUM SEALING RADIO FREQUENCY (RF) AND LOW FREQUENCY CONDUCTING ACTUATOR - A linear actuator comprised of an actuator body having a first portion and a second portion, each arranged along a longitudinal axis of the actuator body. A vacuum bellows is concentrically located in the first portion and is configured to seal a vacuum environment from the second portion. A linear motion shaft is concentrically located substantially within the actuator body and is configured to move in a linear direction along the longitudinal axis. An electrically conductive portion of the shaft is concentrically located substantially within the vacuum bellows and electrically insulated therefrom and is configured to receive and conduct a signal. A lift force generating portion of the shaft is concentrically located substantially within the second portion. An electrical contact pad is electrically coupled to the conductive portion of the shaft and is configured to couple the signal to another surface upon activation of the shaft.06-18-2009
20080258568Electrical Linear Drive Device - An electrical linear drive device with an electric linear motor held in a base housing is proposed that has a long-coil system arranged in a motor housing, and a substantially shorter armature that drives a drive element linearly via a drive rod extending to the outside. Two guide rods running in base housing, and a position measuring rod cooperating with at least one position sensor for position detection that plunges, depending on its position, into base housing are connected to drive element.10-23-2008
20080258567LINEAR MOTOR AND TOOL MOVING DEVICE WITH THE SAME - A tool moving device with a linear motor is provided with a movable body which is movable bodily with a tool on a support frame through a pair of fluid bearings. A plurality of magnet constructs are circumferentially arranged on the movable body to respectively face stationary coils secured to the support frame. Each of the magnet constructs comprises at least one pair of magnet members juxtaposed in the moving direction of the magnet yoke and arranged with their polarities of magnet pole being opposite to each other, wherein respective pairs of the magnet members attached to the circumferential surface form first and second rows spaced from each other in the moving direction of the magnet yoke. Each magnet member in each of the first and second rows is arranged to be opposite in polarity of magnet pole to each of the magnet members next thereto in the circumferential direction.10-23-2008
20090121556Electric machinery of permeable polar face & magnetic circuit sandwiched PM magnetic pole - An electric machinery provided with a PM magnetic pole sandwiched by a permeable polar face and a magnetic circuit from an individual magnetic pole provides an innovative design of having disposed the PM magnetic pole sandwiched between the permeable polar face and the magnetic circuit from the individual magnetic pole to prevent PM magnetic pole from falling off and avoid PM magnetic pole magnetic force from being weakened by inverse excitation during the operation.05-14-2009
20090121558Flexible Electromagnetic Valve Actuator Modeling and Performance - The system contains a first planar permanent magnet having a first direction of magnetization and a first opening formed therein. A second planar permanent magnet has a second direction of magnetization and a second opening formed therein. The second opening is axially aligned with the first opening. The direction of magnetization of the first planar permanent magnet opposes the direction of magnetization of the second planar permanent magnet. A plurality of stationary coils are provided, wherein at least one of the stationary coils is located within the first opening and at least one of the stationary coils is located within the second opening. A pair of extension members traverses the first opening and the second opening. A magnetizable slug is integral with each of the extension members.05-14-2009
20090121557Electric machinery with a conduction winding excited magnetic poles sandwiched PM magnetic pole - An electric machinery provided with a PM magnetic pole sandwiched by conduction winding excited magnetic poles is related to an innovative design of having a PM magnetic pole sandwiched by individual magnetic poles of conduction winding excited so to prevent the PM magnetic pole from falling off due to vibration and to prevent from weakening magnetic force by inverse excitement when the electric machinery is running.05-14-2009
20090045682Stacked rail stator and capacitive armature linear motor - A linear motor for high velocity drive has a transformer which has a magnetic circuit with a central limb; the two ends of stacked unit- or fractional-turn secondary winding of the transformer project at an angle to the longitudinal axis of the central limb; an armature links the two ends, sliding parallel to the longitudinal axis. The armature has dielectrics to form two series-connected capacitors in conjunction with the two ends. The transformer's primary winding is connected to an ac or pulse power source. The resonant frequency for the LC circuit formed by the two capacitors in series to the total effective inductance of the power source, the electric transformer and the armature is determined. The frequency or the pulse rise time of the power source is matched to the resonant frequency, in order to supply adequate electric power from the power source to the series LC circuit.02-19-2009
20080296983CI-CORE ACTUATOR FOR LONG TRAVEL IN A TRANSVERSE DIRECTION - Methods and apparatus for providing relatively long travel in a transverse direction for a magnetic levitation stage apparatus are disclosed. According to one aspect of the present invention, a linear actuator includes a first core, a second core, and at least one coil wrapped around the first core. The first core includes a body portion and a plurality of rails. The body portion has a first axis and a second axis, and the rails have longitudinal axes that are perpendicular to the first axis and parallel to the second axis. The dimensions of the rails along the longitudinal axes are substantially larger than a dimension of the body portion along the second axis. The second core has a third axis that is oriented perpendicularly to the longitudinal axes and to the second axis, and is levitated relative to the first core when a current is provided through the coil.12-04-2008
20090091194ACTUATOR - When currents are applied to driving coils, electromagnetic forces are generated between the currents and magnetic fluxes passing through gaps, a shaft member is swung in one direction, and a tilt angle of a mirror (controlled object) changes relative to a support center point. Electromotive forces generated in detection coils when the magnetic fluxes pass through the detection coils are given as feedback signals to a control unit. The control unit generates currents on the basis of the feedback signals, and applies the currents to the driving coils. By detecting the velocity of the mirror during swinging with the detection coils, the structure of the actuator can be simplified. Further, the responsivity can be increased, and the tilt angle of the mirror can be detected with high accuracy.04-09-2009
20090026847LINEAR MOTOR - In prior art linear motor, large burden is applied to a mechanism for supporting a moving member because magnetic attracting force acts in one direction between armature and moving member and the structure is distorted to cause various troubles. In inventive linear motor, a stator having armature winding and moving member having permanent magnets are arranged to move relatively. The linear motor stator includes a ring-shaped core, armature teeth and armature winding to form a magnetic circuit. Slit grooves are formed in armature teeth opposed to both of front and rear surfaces of the permanent magnets of the moving member with an air gap defined between stator and moving member. Projected members movable along the slit grooves of the armature teeth are provided on the permanent magnet surfaces. Thus magnetic attracting force can be canceled and the member having the permanent magnets can have a high rigidity.01-29-2009
20090134720Method of magnetizing the shaft of a linear stepper motor - In a preferred embodiment, a method of providing axially alternating N and S poles in a portion of an axially extending, cylindrical, smooth shaft for a linear stepper motor, including: providing a magnetizing fixture including: a hollow cylindrical mandrel formed from a non-magnetic material; a conductive wire disposed in parallel, circumferential channels defined in an outer surface of the mandrel; a potting compound surrounding the mandrel to secure the conductive wire in place; and a central bore defined axially and centrally through the mandrel and exposing or nearly exposing the conductive wire; and the central bore being sized to accept axially inserted therein the portion of the axially extending, cylindrical, smooth shaft; inserting the portion of the axially extending, cylindrical shaft in the central bore; and providing a direct current through the conductive wire, the conductive wire is placed in the parallel, circumferential channels such that direction of flow in the conductive wire of a direct current in adjacent ones of the parallel, circumferential channels is in opposite directions. A method of manufacturing the magnetizing fixture is also provided.05-28-2009
20090152957Electric machinery of magnetic pole or magnetic circuit wrapped PM magnetic pole - An electric machinery provided with a PM magnetic pole wrapped by a permeable polar face and a magnetic circuit from an individual magnetic pole provides an innovative design of having disposed the PM magnetic pole wrapped between the permeable polar face and the magnetic circuit from the individual magnetic pole to prevent PM magnetic pole from falling off and avoid PM magnetic pole magnetic force from being weakened by inverse excitation during the operation.06-18-2009
20090108683OBJECTIVE LENS DRIVE AND OPTICAL PICKUP APPARATUS - An objective lens drive and an optical pickup apparatus are provided which can be reduced in size. Two tilt coils and two tracking coils are disposed so that among planes defined by the respective coils, a plane perpendicular to a winding direction thereof is parallel to a reference plane defined on a lens holder at a predetermined reference distance or less, and are disposed at such positions as to be symmetrical to each other about a center of gravity of the lens holder. A focus coil is disposed so that among planes defined by the focus coil, a plane perpendicular to a recording surface of an optical disk is parallel to the reference plane at a predetermined reference distance or less relative to the two tilt coils and the two tracking coils.04-30-2009
20090127940Linear motor - A linear motor (05-21-2009
20090026846Controlled Motion System - A controlled motion system with movers mounted on a hybrid track system comprised of at least one smart section and at least one dumb section. The smart sections control each mover independently, while the dumb sections drive all movers at the same speed. The transition between these sections is characterized by positive control of the movers at all points in the transition. A soft magnetic composite core for the smart sections is disclosed. Also, a single-sided mover for smart sections that is constrained against loads in all direction, except for the direction of motion, is disclosed.01-29-2009
20090152959SECONDARY PART OF A LINEAR DRIVE - A secondary part of a linear drive, in particular of a cylindrical or planar linear drive, has permanent magnets arranged on a soft-magnetic mount in perpendicular relationship to the movement direction of the linear drive. The permanent magnets are curved at least on the surface facing the primary part. The permanent magnets cover each only a predeterminable part of a magnetic pole and have a radial magnetization direction in relation to their outer surface.06-18-2009
20090096298LINEAR-MOTION ACTUATOR - A linear-motion actuator includes a fixed side member, a rotor rotatably supported by the fixed side member, and an output shaft disposed on an inner side of the rotor and movable in an axial direction. The linear-motion actuator may further include a rotation-linear motion converting mechanism which is provided with a turning prevention means for restricting rotation of the output shaft and which converts rotation of the rotor into a linear motion in the axial direction of the output shaft. The fixed side member may include a tubular member which accommodates a part of the output shaft and guides the output shaft for movement in the axial direction, and the turning prevention means may include an engagement part formed on the output shaft and a restriction part formed on an inner peripheral face of the tubular member and engaged with the engagement part.04-16-2009
20090096297Linear motor, drive stage, and XY drive stage - A linear motor is provided in which a magnetic attracting force acting between a stator and a mover is mechanically cancelled by arrangement of armature units, and can be easily assembled. The linear motor includes a primary-side member in which magnets are arranged in a traveling direction and a secondary-side member in which armature units each including a core and an armature winding are arranged in the traveling direction and in which a spacer is interposed between the armature units. The primary- and secondary-side members relatively move. When a side-surface member is slid in Y direction, the dovetail groove of the side-surface member and the dovetail tenon of the spacer are fitted together, and are combined together in a dovetail joint. When an upper-surface member is slid in the X direction, the dovetail groove and tenon are fitted together to have a dovetail joint there. The armature units and the spacers are combined together. A driving stage and an XY driving stage including this linear motor are also provided.04-16-2009
20080303354COIL SUPPORT UNIT, MOTOR AND EXPOSURE APPARATUS USING THE SAME, AND DEVICE MANUFACTURING METHOD - A coil support unit which supports a coil used for generating a thrust to a movable portion. The coil is supported such that stable thrust characteristics can be obtained. The coil support unit constrains the coil in a thrust direction, and slidably supports the coil in a direction perpendicular to the thrust direction, on a moving surface.12-11-2008
20080265691Canned Linear Motor Armature and Canned Linear Motor - The present invention provides a canned linear motor armature and a canned linear motor in which insulation reliability of the canned linear motor armature of a water cooling type is improved, and assembly workability is good.10-30-2008
20080265690Linear Motor - A position-data converter and a motor-drive control device are connected. The position-data converter receives two-phase, sine-wave analog signals da and db from two first magnetic detectors, respectively, and converts these signals da and db to position data. On receiving a positioning instruction, the motor-drive control device calculates the value of current, from the current position signal generated by the position-data converter. The permanent magnets incorporated in a linear motor are used as components of a linear scale, as well.10-30-2008
20080265688Linear Motor, Stage Apparatus and Exposure Apparatus - A linear motor is equipped with a coil body (10-30-2008
20090072633HIGH PERFORMANCE LINEAR MOTOR AND MAGNET ASSEMBLY THEREFOR - 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.03-19-2009
20080211322Multipolar, Linear or Rotating Synchronous Direct Drive Motor - The invention relates to a multipolar, linear or rotating synchronous direct drive motor which comprises a primary part and a secondary part. The primary part comprises a yoke and a plurality of teeth and slots interposed between said teeth, and winding strands of a polyphase winding running inside the slots. Between two winding strands of the same phase order the winding strands of the other phase or phases are disposed so as to overlap them. The secondary part is arranged opposite the primary part and comprises a plurality of permanent magnets of changing polarities on a common reflux base. The slot exits have an even slot pitch TN and the permanent magnetic poles have an even pole pitch TP. According to the invention, the winding strand of a respective phase winding consists of a continuous highly flexible braided wire, said braided wire being guided through the slots so as to meander around a group of teeth. The entire winding of a respective phase is configured by the braided wire which is arranged in layers in the respective slots. Every slot has a width that corresponds to the diameter of the insulated braided wire. The braided wires of the winding strands of the remaining phase or phases are guided between the slots of the first phase in a symmetrically off-set relation thereto. The layer structure of the winding of the meshed meandering winding strands results in flat winding overhangs having a small volume in the area of the points of intersection of the partial windings outside the slots.09-04-2008
20080246350Secondary Part of a Linear Electrical Machine, and Method for its Production - The invention relates to a secondary part (10-09-2008
20080246347LINEAR MOTOR AND MACHINE TOOL HAVING THE SAME MOUNTED THEREON - The present invention provides a linear motor that uses a plurality of cylindrical linear motors to increase power and to enable a compact configuration. A linear motor 10-09-2008
20080284256Plastics Injection-Molding Machine With Integrated, Linear-Rotary Direct Drive - A plastics injection-moulding machine is to be equipped with a more compact drive that undergoes less wear. For this purpose, it is envisaged to integrate the direct rotational drive into the direct linear drive. Accordingly, the electric linear motor has a pot-shaped external rotor (11-20-2008
20080284255VOICE COIL MOTORS AND PRE-COMPRESSION GENERATION DEVICES THEREOF - A voice coil motor. At least one guide bar is connected to a fixed base. A coil is connected to the fixed base. A support base is movably fit on the guide bar. An annular magnetic member is connected to the support base and surrounded by the coil. A magnetization direction of the annular magnetic member parallels a moving direction of the support base and annular magnetic member. The annular magnetic member includes a first magnetic pole and a second magnetic pole. The first magnetic pole is disposed in the coil and separated from the bottom thereof. The second magnetic pole is disposed outside the coil. The coil interacts with the annular magnetic member to generate a first force, driving the support base and annular magnetic member to move along the magnetization direction of the annular magnetic member.11-20-2008
20080284254Stator Packet For a Magnetic Levitation Train - A stator packet for magnetic levitation vehicles is described. The stator packet has a plurality of sheets (11-20-2008
20080290740Primary Part of a Linear Motor and Linear Motor Therewith - The invention relates to a linear motor and in particular a primary part of the linear motor for the movement of a secondary part, with a plurality of coils for inducing a magnetic field transmitting force along an axis between the primary part and the secondary part and with teeth, which are made from a magnetizable material, are arranged between adjacent coils and have a base section remote from the axis and an end section facing the axis, the teeth on the end section being wider than on the base section. In order to provide a primary part or a linear motor which also allow for high force densities given a compact design, the coils also extend in the interspace between the end sections of adjacent teeth so as to increase the magnetic flux density.11-27-2008
20080211324LINEAR MOTOR - A linear motor comprising a stator core and/or a mover. The stator core of said linear motor comprising an inner perimeter, an outer perimeter essentially encircling the inner perimeter, a first and a second tooth being arranged along one of the inner perimeter or the outer perimeter, a slot for receiving a stator coil, said slot being a cavity arranged within the stator core, wherein said stator core is divided into a first stator part and a second stator part, said first stator part including the first tooth, being arranged to partially define the slot, and being made of soft magnetic powder, and said second stator part including the second tooth, being arranged to partially define the slot, and being made of soft magnetic powder. The mover of said linear motor comprising at least one section of soft magnetic material and at least one permanent magnet, the at least one section of soft magnetic material and the at least one permanent magnet being aligned in an axial direction of the mover, wherein a polarization vector of said at least one permanent magnet is directed axially.09-04-2008
20080246349Drive guide apparatus - The present invention provides a drive guide apparatus capable of ensuring an increased lifetime by preventing heat generated from a primary side of a linear motor from being transferred to a rail or a moving member of a guide mechanism to which the primary side of the linear motor is connected, thereby preventing variation of rolling resistance or sliding resistance of the guide mechanism. The drive guide apparatus has a linear motor and a guide mechanism that has a rail and a moving member provided to be movable relative to the rail. A primary side of the linear motor is connected to the rail. Thermal insulators for blocking heat generated from the primary side of the linear motor are provided between the primary side and the rail of the guide mechanism to which the primary side is connected directly or indirectly.10-09-2008
20090015076CANNED LINEAR MOTOR ARMATURE AND CANNED LINEAR MOTOR - There are provided a canned linear motor armature and a canned linear motor capable of reducing an interface by reducing a number of parts of constituting members of an armature winding portion, capable of firmly carrying out injection molding and filling without involving air bubbles or the like by promoting an operability of the injection molding and filling by adopting a low viscosity resin and having a high long period insulation reliability of the armature winding against a refrigerant.01-15-2009
20090015077LINEAR MOTOR - In prior art linear motor, magnetic attractive force acts in one direction between armature and moving member, imposing heavy burden on a supporting mechanism of the moving member, distorting the structure and causing various troubles. Furthermore, permanent magnets' surface is difficult to protect. The inventive linear motor includes a stator having armature winding and moving member having permanent magnets arranged to move relatively. The stator includes ring-like cores, armature teeth and armature winding to constitute a magnetic circuit. Slit grooves are disposed in the armature teeth opposite to both of obverse and reverse sides of the permanent magnets of the moving member through air gap and protrusion members movable along the slit grooves of the armature teeth and a member having a hollow part formed therein are provided. The permanent magnets are disposed in the hollow part so that magnetic poles adjoining along the moving direction have different polarities.01-15-2009
20080211323Magnetic actuator device - The magnetic actuator device of the invention comprises a magnetic field generator external to the duct and a permanent magnetic field generator internal to the duct, separated from the magnetic field generator external to the duct by a non-magnetic separator wall, and connected to a moving member, the permanent magnetic field generator internal to the duct being dimensioned to have a face spaced apart from the separator wall so as to define a space that can receive particles of metal without the actuator device jamming.09-04-2008
20090152956Electric machinery with a conduction winding excited magnetic poles wraps PM magnetic pole - An electric machinery provided with a PM magnetic pole wrapped by conduction winding excited magnetic poles is related to an innovative design of having a PM magnetic pole wrapped by individual magnetic poles of conduction winding excited so to prevent the PM magnetic pole from falling off due to vibration and to prevent from weakening magnetic force by inverse excitation when the electric machinery is running.06-18-2009
20080258566Actuator and electric toothbrush using the same - 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.10-23-2008
20090140581VOICE COIL MOTORS - 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.06-04-2009
20090085412BRUSHLESS ELECTRIC MACHINE - A first member (04-02-2009
20090096296RELIEVING STRESS IN A FLEXURE - A flexure includes a shaped sheet of material having a middle portion coupled to a magnet, an end portion, and a corner portion between the end portion and the middle portion, the corner portion including a curve with a concave curvature relative to a point of view outside the corner portion. The flexure may be used in a linear motor.04-16-2009
20090001822Electrical Machine Having Plastic-Sheathed Pole Teeth, and a Corresponding Method - The production effort for electrical machines with pole teeth which are fitted with permanent magnets is intended to be reduced. A permanent magnet is inserted between two pole teeth halves (01-01-2009
20090079275ACTUATOR - An actuator in which, when a supporting shaft, where a mirror (control object) is provided, is tilted by receiving an electromagnetic force of a magnetic driving mechanism, small balls of a supporting mechanism move in an axial direction in a space provided between an outer base and an inner ring member. Therefore, the supporting shaft and the inner ring member holding the supporting shaft swing. At this time, since the inner ring member swings around a rotational fulcrum as center, the supporting shaft can swing around one rotational fulcrum as center at all times. A plurality of laid members serving as a rotation restricting member prevent rotation of the supporting shaft in a direction around the axis.03-26-2009
20090039713Rotary Linear Drive Having A Transmitter Device - The aim of the invention is to provide a linear/rotation drive with an improved transmitter device for detecting the linear and rotational movements. For this purpose, the transmitter device (02-12-2009
20090072634ELECTRICAL MACHINE - The invention relates to an electrical machine (03-19-2009
20090146507Linear Motor Actuator - A linear motor actuator includes a raceway member 06-11-2009
20090140582PLANAR MOTOR AND STAGE USING THE SAME - A planar motor includes a movable body and a stator configured to drive the movable body in a plane. The stator includes a first stator unit and a second stator unit. The movable body is moved in a first direction by a force acting between the movable body and the first stator unit, and is moved in a second direction by a force acting between the movable body and the second stator unit. The first stator unit and the second stator unit are arranged to face each other in such a manner that the movable body is provided therebetween.06-04-2009
20090127941LINEAR DRIVE WITH A MOVING, REDUCED-MASS AND LATERALLY GUIDED PASSIVE UNIT - The invention relates to a linear drive having a stationary active unit (05-21-2009
20090115261Air Floating Linear Motor - An air floating linear motor comprises a fixed part and a movable part. The movable part floats above the fixed part. The movable moves with respect to the fixed part by the magnetic interaction. The fixed part is disposed with a receiving portion for assembling an external device such as a position feedback device or a travel protection device, etc. Therefore, the air floating linear motor is much more simplified and convenient in fabrication and installation.05-07-2009
20080265689Woodworking Machine With Linear Direct Drive - The aim of the invention is to provide a robust, simple woodworking machine. To achieve this, the invention provides a machine comprising at least one linear direct drive, which contains a primary part (10-30-2008
20090127938LINEAR MOTOR COIL ASSEMBLY AND LINEAR MOTOR - An ironless linear motor (05-21-2009
20090127939LINEAR SYNCHRONOUS MOTOR AND LINEAR MOTOR ACTUATOR - Provided is a linear synchronous motor in which, when a three-phase alternating current passes through a coil of a mover, thrust forces generated by the alternating currents of each phase are equalized, thereby making it possible to minimize variation in thrust force, the linear synchronous motor including: a stator magnet (05-21-2009
20090026849ELECTRIC MACHINE COMPRISING A SCREENED LEAKAGE-FIELD-SENSITIVE SENSOR - The aim of the invention is to improve the precision of measuring leakage field sensitive sensors on electric machines. According to the invention, the electric machine comprises a sensor device (01-29-2009
20090026848LINEAR MOTOR - In prior art linear motor, since magnetic attractive force acts in one direction between an armature and a moving member, heavy burden is imposed on a supporting mechanism of the moving member, distorting the structure and causing various troubles. Inventive linear motor includes a stator having armature winding and moving member having permanent magnets arranged to move relatively. The linear motor stator includes rink-like cores, armature teeth and armature winding to constitute a magnetic circuit. Slit grooves are disposed in the armature teeth opposite to both of the obverse and reverse sides of the permanent magnets of the moving member through air gap and protrusion members movable along the slit grooves of the armature teeth and a member having the permanent magnets include a part in contact with other members, the part being made of material having high endurance.01-29-2009
20090051227LINEAR MOTOR - In prior art linear motor, a large burden is applied to a mechanism for supporting a moving member because a magnetic attracting force acts in one direction between armature and moving member and the structure is distorted to cause various troubles. In an inventive linear motor, a stator having an armature winding and a moving member having permanent magnets are arranged to be moved relatively. The stator of the linear motor includes a ring-shaped core, armature teeth and the armature winding to form a magnetic circuit. Slit grooves are formed in armature teeth opposed to both of front and rear surfaces of the permanent magnets of the moving member with an air gap defined between the stator and the moving member. A member holding the plurality of permanent magnets has holes for allowing a medium to enter or exit.02-26-2009
20080265687Linear electromagnetic driving module and linear electromagnetic driving device - A linear electromagnetic driving device composed of multiple linear electromagnetic driving modules. A linear electromagnetic driving module has a base, an electromagnetic driving assembly, a crankshaft assembly and a bumper assembly. The electromagnetic driving assembly has a housing with coil and a linear magnetic shaft capable of moving linearly in the housing. The crankshaft assembly is mounted on the base, is connected to the linear magnetic shaft through crank arm and has two crank disks with pivot output shafts mounted rotatably on the base. The electromagnetic induced power output of each driving module is controlled and coordinated electronically through a sensor assembly on the driving device to maximize the energy efficiency. The device is compact and energy efficient.10-30-2008
20080252153Electric Linear Drive Unit - The invention proposes an electric linear drive unit with an electric linear motor that is arranged in or on a basic housing. A sensor device arranged in or on the basic housing serves for determining at least one position of a driving element that is driven by the linear motor. Electric lines are routed from a coil system of the linear motor and from the sensor device to a common connecting point on the basic housing through at least one duct that extends within the basic housing, wherein said electric lines extend through the connecting point to a connector that is arranged at the connecting point and contains connecting means for producing a connection with external lines or cables. The connecting point is sealed by means of an insulating casting- or injection-molding compound at least in the region in which the lines extend from the connecting point.10-16-2008
20080252152Electrical Machine with an Insertion Device for a Permanent Magnet Between Pole Tooth Halves and Corresponding Production Method - The manufacturing effort for producing electrical machines with pole teeth which are fitted with permanent magnets is intended to be simplified. The permanent magnets are inserted into the pole teeth only at the end of the manufacturing process, for this purpose, with the pole teeth each comprising two pole teeth halves (10-16-2008
20080252150Linear Actuator in an Electric Percussion Tool - A linear actuator in an electric percussion tool is equipped with a rotor and a stator, wherein the rotor has at least two stacks, which are arranged at a predetermined distance from one another, of superposed permanently magnetic bars, the stator is formed, at least partially, from a soft-magnetic material and has at least two pairs of teeth with mutually opposed teeth, of which each pair of teeth receives one of the two stacks between them, in each case, while forming an air gap, and wherein the stator has at least two magnetically conductive inner regions which are located between the two stacks, are arranged at a predetermined distance from one another in the direction of movement of the rotor and are at least partially surrounded, in each case, by an essentially hollow-cylindrical coil arrangement, the central longitudinal axis of which is oriented approximately transversely to the direction of movement of the rotor, and the rotor has a driving element which is able to transmit a mechanical impulse to a tool belonging to the electric percussion tool.10-16-2008
20080252151TWO DEGREE OF FREEDOM MOVERS WITH OVERLAPPING COILS10-16-2008
20080218004MOVING-MAGNET TYPE LINEAR MOTOR - A moving-magnet type linear motor is provided with cooling blocks which are attached to each of stator bases alongside a coreless coil and which allow coolant to flow therethrough for cooling the coreless coil. Each of the cooling blocks has in a base end portion thereof a fluid passage for flowing coolant and at an extreme end portion thereof a plurality of sheet-like protrusions like fins which are arranged alongside a part of the circumferential surface of the coreless coil with a clearance between each protrusion and the next thereto. Each cooling block is thermally closely jointed with the coreless coil at the extreme ends of the sheet-like protrusions.09-11-2008
20080303355Rail motor system and method - A variable reluctance electric motor employs motor coils installed adjacent to or integral with railroad rails and uses the steel wheels of railroad locomotives and cars as its moving elements. This “rail motor” electrically propels unmodified conventional railroad trains or individual railroad cars, without the use of diesel engines and with no mechanical connection to the vehicles, and is electronically controlled. Electric operation eliminates the production of air pollution by any locomotive traveling through rail motor-equipped zones, improves system capacity by providing boost power on ascending grades, and can be used to brake trains, recovering and storing the energy.12-11-2008
20090058200Linear Drive with a Reduced Axial Force Component, as Well as a Linear Compressor and Refrigerator - A linear drive including a stator and a rotor configured for linear reciprocal movement along an axis, with the stator having a magnetic-field guide core having a plurality of legs extending each with one foot substantially toward the rotor, with the rotor having a plurality of magnets disposed in a linear array along the direction of the axis, wherein at least one of a respective one of respective lengths of the magnets along the axis and the respective widths of the legs along the axis and the respective spacings of the legs along the axis are different such that force components of the magnets along the axis will substantially compensate each other when the linear drive is in a de-energized state.03-05-2009
20090058199DRIVING APPARATUS, EXPOSURE APPARATUS, AND DEVICE MANUFACTURING METHOD - A driving apparatus includes a mover having a magnet, and a stator having a coil. The driving apparatus is adapted to control the electric current to be applied to the coil to cause relative movement between the mover and the stator. The stator includes a coil holding member configured to hold the coil, a supporting member configured to support the coil holding member movably in first and second directions, a restriction member configured to restrict movement of the coil holding member in the first direction and to allow movement of the coil holding member in the second direction, and a biasing unit configured to press the coil holding member against the restriction member.03-05-2009
20090058198Electrical Linear Drive - An electrical linear drive device comprises an outer housing consisting of a housing tube and two housing covers disposed at the ends thereof The outer housing defines in the interior thereof a receiving space, into which the drive part of a drive unit in the form of an electrodynamic linear direct drive like a cartridge is placed, and an output drive rod extends outward through the front housing cover. From a drive coil arrangement of the drive unit an electrical operation cable extends to an central electrical interface means. The electrical interface means is disposed laterally on the housing tube and the operation cable and the signal cable extend in a cable channel formed in the wall of the housing tube.03-05-2009
20090033157CYLINDRICAL LINEAR MOTOR - The cylindrical linear motor includes: a stator 02-05-2009
20080246346Electromagnetic Device For Converting Mechanical Vibrational Energy Into Electrical Energy - An electromagnetic generator comprising two magnets and a coil disposed therebetween, the two magnets being configured to define therebetween a region of magnetic flux in which the coil is disposed whereby relative movement between the coil and the magnets generates an electrical current in the coil, and a vibratable first mount for each of the magnets and a vibratable second mount for the coil whereby each of the at least two magnets and the coil are respectively vibratable about a respective central position.10-09-2008
20080238218Electromagnetic moving system - An electromagnetic moving system comprises a stator, a moving body and a controller. The stator comprises a circuit board with two layers of electrically connected coil windings spaced apart in a series way and made as spirals with center and peripheral points. The spirals of one layer are shifted in respect to the spirals of the adjacent layer along the line connecting the center points thus the center points of the spirals of one layer in transparent view are located between two nearest spirals of the adjacent layer. Each of the spirals of one layer in transparent view at least partially overlaps two nearest spirals of the adjacent layer. The moving body is comprised of one permanent magnet such as to cause interaction with the stator when it is powered, thus creating a force tending to propel the moving body along the line connecting said center points.10-02-2008
20080231123LINEAR MOTOR NOT REQUIRING YOKE - A linear motor not requiring a yoke structure is provided. A first unit forming a stator is constructed of two permanent magnet rods. The permanent magnet rods each have a magnetically permeable shaft and a permanent magnet row having a plurality of permanent magnets so arranged that opposite polarities of their magnetic poles alternately appear. The permanent magnet row of the permanent magnet rod is arranged with a positional difference of 180° in an electrical angle from the permanent magnet row of the permanent magnet rod. The second unit that constitutes a moving member includes unit cores and winding sets arranged alternately in an axial direction of the shaft. The winding set includes two excitation windings through each of which the permanent magnet rod loosely extends. One excitation winding of the winding set is excited with a phase difference of 180° in an electrical angle from the other excitation winding.09-25-2008
20080224548Braking Device For an Electric Motor - A braking device for an electric motor includes two brake pads, which are connected to brake disks, which cooperate with a brake rail. The two brake pads are rigidly connected by a connecting element, which is able to experience a certain deflection under the influence of a piezoelectric element, which is used to distance the two brake pads from each other. An assembly, which includes the two brake pads and their connecting element, is fastened on a support by a fastening device, which is elastically deformable along the direction at right angles with respect to the brake rail and to the two brake pads. The elastically deformable fastening device is formed of plates, which are connected on one end to the assembly and on the other end to the support.09-18-2008
20080246348Ironless Magnetic Linear Motors Having Levitating and Transversal Force Capacacities - A ironless magnetic motor (10-09-2008
20080218005LINEAR 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 W09-11-2008
20080203828Displacement Device - Especially for use in the semiconductor industry, a displacement device (08-28-2008
20080197719LINEAR ACTUATOR - An object of the present invention is to provide a linear actuator in which reliability is improved, and performance is also easily improved. The present invention provides a linear actuator including a stator, a movable element having an iron member, and being reciprocatable with respect to the stator, a permanent magnet fixed to the stator so as to be opposed to the iron member, and a coil fixed to the stator. Because both the coil and the permanent magnet are fixed to the stator, electrical current does not have to be supplied to the movable element, and the feeder lines connected to the coil will not be broken due to the movement of the movable element. In addition, the weight of the movable element will not be increased even when the weigh of the permanent magnet is increased in order to obtain high magnetic flux density for improvement in performance. Moreover, because the movable element does not include a magnet, a magnetizing operation does not have to be applied to the movable element. The permanent magnets may be a pair in which the directions the magnetic poles thereof differ from each other, and two pairs of permanent magnets may be provided. The number of magnetic fluxes that run through the magnetic pole elements and the iron member can be increased by providing a magnetic reluctance section around the permanent magnets.08-21-2008
20080290741PLANAR MOTOR - A planar motor includes a flat base element arranged in a plane, and substantially cuboidal first magnets arranged on the base element whose magnetization is perpendicular to the plane and which are arranged at evenly spaced intervals and with alternating polarity in a first direction and in a second direction. The planar motor also includes substantially cuboidal second magnets whose magnetization is parallel to the plane and which are disposed with alternating polarity in the first direction and second direction between the first magnets, so that each first magnet is surrounded by four second magnets. The first magnets are disposed on protrusions of the base element.11-27-2008

Patent applications in class Linear

Patent applications in all subclasses Linear