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7619377 |
Linear motor system
A linear motor system that can extend the stroke of a linear motor, with power saving and at a low cost, is provided. In a linear motor system, constituted by a linear motor 100 , a controller 7...
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7619330 |
Stage apparatus
A stage apparatus includes a movable stage; a magnetic unit including a first permanent magnet that is provided on the stage and magnetized in a direction perpendicular to a moving direction of the...
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7619329 |
Permanent magnet member for coil motor and voice coil motor
A magnet body 1 including a shorter periphery 11 , a longer periphery 12 located at a position separated from the shorter periphery 11 by a predetermined distance, and a pair of side...
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7617779 |
Linear brushless D.C. motor with stationary armature and field and with integratable magnetic suspension
This disclosure describes an electromagnetic system for efficient propulsion, suspension, and guidance. The track is inexpensive totally passive steel. This linear form of the D.C. motor provides...
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7615900 |
Power generator for electronic devices
A power generator comprises a coil with having ends connected to electrical contacts, a magnet mounted on a slide rod placed surrounded by the coil and having a positive pole and a negative pole...
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7615894 |
Electric motor with a permanent magnet carrier rotating a sprocket
A high voltage, low current electric motor. The motor comprises a drive shaft turned by a sprocket that is driven by an assembly of electromagnets. A carrier supporting permanent magnets travels in...
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7608949 |
Sliding door comprising a magnetic support and/or drive system comprising a row of magnets
A magnetic drive system for driving a door leaf in a driving direction is disclosed. The drive system includes a row of magnets disposed in the driving direction and having a longitudinal...
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7605928 |
Two-dimensional nanopositioner with crude and fine stages
The invention relates to accurate positioning devices which make it possible to displace an object within a nanometric range. The device includes a fixed foundation element (FE) provided with fine...
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7604442 |
Multi-axis machine tool
In a multi-axis machine tool comprising a first slide way ( 2 a ) and a second slide way ( 2 b ) set apart one from the other and extending parallel along a longitudinal axis (X), a machining...
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7602091 |
Positioning apparatus and exposure apparatus
A positioning apparatus includes a beam which is driven in a first direction that is perpendicular to the longitudinal direction of the beam, a movable member which surrounds at least a part of the...
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7602088 |
Linear motor and exposure apparatus having the same
A method of driving a linear motor having a multi-phase coil as a stator or a movable element includes the steps of positioning the stator at a position where a driving electric power becomes...
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7602087 |
Linear motor having dual coil configuration
A linear motor is provided that includes a magnetic assembly, a movable element and a coil assembly that is operative to interact with the magnetic assembly to drive the movable element along a...
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7602086 |
Driving device, exposure apparatus using the same, and device manufacturing method
A driving device includes an electromagnetic actuator indicating a first coil and a second coil which detects a change in magnetic flux generated by the first coil, and an electromagnetic actuator...
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7598697 |
Electric motor and a method therefor
A motor and a method for serves finding the position of an armature in relation to a stator of the motor. In the method and the motor the armature is driven by an exciting field which is produced...
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7595944 |
Optical actuator
An optical actuator is disclosed. The optical actuator includes a seat bearing the optical element, a yoke comprising an end, a suspension system comprising at least one spring sheet connecting the...
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7595571 |
High 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...
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7592760 |
Lithographic apparatus and device manufacturing method
A positioning device configured to position a first and a second movable object in a substantially common operation area is presented. The positioning device includes a first coil assembly arranged...
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7592720 |
Sliding door comprising a magnetic drive system provided with a path measuring system
A magnetic drive system for a door leaf includes a carrying slide for carrying the door leaf; a row of magnets disposed in the driving direction and having a length L and a longitudinal direction,...
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7586219 |
Drive 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...
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7586218 |
Moving apparatus, exposure apparatus, and device manufacturing method
A moving apparatus including a movable portion which is supported so as to move in a first direction, a first actuator having a movable element and a stator, the movable element being connected to...
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7586217 |
High performance 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...
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7582991 |
Linear motor
A linear motor for which armature core can readily be manufactured is provided. An armature 10 is constituted from an armature core main portion 19 and first magnetic pole constituent...
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7579793 |
System and method for efficient wide dynamic range coil drive
Methods and systems are provided for driving one or more force coils. A system for driving force coils is provided including a PWM drive coupled to a first coil and a linear drive coupled to a...
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7579721 |
Chain support structure for a planar motor
A chain support structure for a planar motor comprises: a fixing base, a support arm and a load-bearing member, the fixing base is fixed to the stator, the support arm has one end connected to the...
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7579720 |
Origin microadjustment mechanism for a linear motor
An origin microadjustment mechanism for a linear motor is assembled on a stator of the linear motor and comprises a load bearing member fixed to a sensing member and two positioning seats. The load...
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7576462 |
Electromagnetic exciter
An electromagnetic exciter includes a casing having a cylindrical side wall with first and second end openings. A suspension supports a magnetic circuit assembly vibratably in the cylindrical side...
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7576456 |
Linear actuator
In a linear actuator ( 1 ), on the inside of a rectangular tubular movable element ( 3 ), a linear guide ( 14 ) that supports the movable element ( 3 ) so as to be linearly movable is positioned at...
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7576455 |
High performance focusing actuator of a voice coil motor
A high performance focusing actuator of a voice coil motor comprises a retaining unit having a plastic retaining frame; a center portion of the plastic retaining frame being a receiving space; two...
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7576454 |
Multiple magnet coil in gap generator
The present invention is an improved energy harvester or generator based on a yoked magnet array design based on a plurality of magnets arranged into at least two spaced apart linear or circular...
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7576453 |
Steel wheel-type linear motor
The invention provides a steel wheel-type linear motor in which a protective cover 11 having insulating properties and coming in direct contact with a stator coil 9 is located on the ground...
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7576452 |
Coreless linear motor and canned linear motor
A coreless linear motor and a canned linear motor that can significantly reduce an increase in surface temperature of a linear motor armature are provided. In a magnetic field system of a coreless...
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7573170 |
Motor modules for linear and rotary motors
A motor module, method, apparatus and system for implementing linear and rotary motors, such as relatively large rotary motors, are disclosed. In one embodiment, an electrodynamic machine can...
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7573162 |
Linear motor
A linear motor having a more preferable braking function is realized with a low cost. A linear motor has a slider and a stator. A driving winding is wound around the slider. A plurality of...
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7573161 |
Positioning device
The positioning device includes at least one displaceable carriage, liquid slide bearings on which the carriage is displaceable, and a carriage drive. The latter includes a first linear motor...
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7567005 |
Long stator motor
A long stator motor, particularly for driving a magnetic levitation transport system, includes a stator iron, inside of which grooves for accommodating cable windings are provided. At least two...
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7566997 |
Gas bearing system
A linear motor device has a gas bearing and comprises a platen and a motor stack with a bottom face positionable above the platen. The motor stack has a bottom face with a recessed gas pocket. The...
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7564168 |
Driving device
A driving device includes an electromechanical transducer that is extended and contracted by application of voltage, and a support member that slidably supports a movable body and that is displaced...
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7564151 |
Linear actuator having mechanism for stopping linear movement of output shaft without touching rotor
A stopper member is included in a linear actuator comprising a stator assembly, a rotor assembly, an output shaft, and a stopper pin which is fixedly disposed at a frontward portion of the output...
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7560835 |
Electrical induction machine and primary part
A primary part of an electrical induction machine, especially a synchronous motor or a linear motor, includes a plurality of modules which each have teeth situated in a row having at least...
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7557470 |
6-axis electromagnetically-actuated meso-scale nanopositioner
A MEMS actuator includes a coil stack in the form of microfabricated, electrically conductive first and second superposed layers. A magnet array is superposed in magnetic communication with the...
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7557469 |
Positioning system and linear motor
A positioning system includes a stage configured to move while carrying an object thereon, an interferometer configured to measure a position of the stage, a driving unit configured to drive the...
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7554277 |
Circuit device for increasing the useable motor voltage in a long stator drive and method for operating a magnetically levitated vehicle provided with said type of circuit device
A circuit device is disclosed which is used to increase useable motor voltage in a long stator drive. Further, suitable methods for operating a magnetically levitated vehicle provided with the...
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7548010 |
Active material based actuators for large displacements and rotations
An actuator adapted to incrementally translate and/or rotate an object, the actuator comprising a body comprising a first portion, a second portion, and an opening coaxially extending from the...
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7547998 |
Aligning apparatus including an attraction preventing plate provided between permanent magnet and magnetic member
An aligning apparatus includes a moving member, a magnetic member arranged vertically above the moving member, a stator unit which is arranged vertically below the moving member and has a plurality...
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7541699 |
Magnet assembly, linear actuator, planar motor and lithographic apparatus
This invention relates to a magnet assembly that includes a ferromagnetic member extending in a first direction, an array of magnetized poles of opposite polarity arranged adjacent to each other in...
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7538469 |
Synchronous machine design and manufacturing
Synchronous motors according to the invention operate at higher efficiency, with lower cost, reduced mass and reduced cogging. Magnet dimensions are selected that reduce cogging forces to a...
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7538456 |
Moving magnet type linear actuator
In a moving magnet type linear actuator ( 10 ), a stator ( 30 ) having an armature ( 32 ) including a magnetic iron core ( 33 ) fixed on a stator base ( 31 ) and an armature winding ( 34 ) wound...
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7537091 |
Magnetic elevator door mover
An elevator door mover device ( 40 ) includes a threaded ferromagnetic shaft ( 42 ). Magnetic movers ( 48 ) associated with doors ( 26 ) generate magnetic fields that cause the doors to move...
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7535328 |
Electromagnetic switch
In an electromagnet switch, a stationary iron core is composed mainly of a base part and a disk part. The base part is faced to a plunger and the disk part is forcedly inserted and fixed to a boss...
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7531923 |
Coreless linear motor
An object of the invention is to provide a coreless linear motor which can suppress the increase in the temperature of an armature winding. There is provided a coreless linear motor in which a...
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