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US20150069026 WELD HEAD  
A weld head for spot welding two or more components together. The weld head includes first and second electrode assemblies and a linear actuator motor to drive the first electrode assembly into a...
US20050073269 Linear motor system  
A system comprises an energy store subsystem connected to an electronic converter subsystem, and a linear motor subsystem connectable to the electronic converter subsystem through a selector...
US20120068635 Linear Actuator and a Table Comprising a Linear Actuator as well as a Motor for the Linear Actuator  
An embodiment linear actuator for an electrically adjustable piece of furniture includes a brushless DC motor arranged to effect a linear movement of the linear actuator, as well as a control...
US20140110508 Solenoid Actuator  
A solenoid actuator is described. The solenoid actuator comprises an armature, pole piece(s), electromagnet coil(s) arranged, in response to energisation, to cause travel of the armature between...
US20100294161 CABLE TRANSPORTATION SYSTEM AND RELATIVE OPERATING METHOD  
A cable transportation system has a pull cable; at least one transportation unit moving along a given path and connectable selectively to the pull cable by a coupling device; at least one...
US20140239855 THRUST RIPPLE MAPPING SYSTEM IN A PRECISION STAGE AND METHOD THEREOF  
The present invention proposes a thrust ripple mapping system in a precision stage with the thrust ripple mapping system comprising a moving stage, a load cell, a plurality of motors and a...
US20080169774 Integrated linear motor  
The present invention provides an integrated linear motor, which comprises a linear stage and a controller coupled to the linear stage, wherein the linear stage comprises a Hall sensor, an...
US20080284360 BLOCK SWITCHING TRANSIENT MINIMIZATION FOR LINEAR MOTORS AND INDUCTIVE LOADS  
A block switch controller for a linear motor is disclosed, the block switch controller having a motor current threshold profile controlling the switching of a plurality of block switches in a...
US20140131476 INJECTOR AND CONTROL METHOD FOR AN ULTRASONIC MOTOR  
Provided is an injector in which adhesion between a stator and a rotor of an ultrasonic motor can be released efficiently. An injector (1) which injects a chemical liquid includes: an ultrasonic...
US20120249019 POSITIONER  
A coil of an electro-pneumatic converting portion is connected in parallel with a constant voltage circuit. An electric current regulating portion is provided in a supply line for an electric...
US20140340783 BACK ELECTROMOTIVE FORCE MONITORING CIRCUIT, MOTOR DRIVE DEVICE, MAGNETIC DISK STORAGE DEVICE, AND ELECTRONIC APPLIANCE  
A back electromotive force monitoring circuit has a speed detection voltage generator which biases a back electromotive force generated by a voice coil motor with a predetermined reference voltage...
US20150234297 Method of Calibrating a Reluctance Actuator Assembly, Reluctance Actuator and Lithographic Apparatus Comprising Such Reluctance Actuator  
A reluctance actuator assembly comprising a reluctance actuator, a flux sensor to measure a magnetic flux in a gap of the reluctance actuator, and a flux amplifier to drive an actuator coil of the...
US20140363150 METHOD FOR EMBEDDED FEEDBACK CONTROL FOR BI-STABLE ACTUATORS  
A drive mechanism having a bi-stable motor driving an actuator with a high starting torque, and a slower, regulated velocity as the actuator moves through its range of travel. This advantageously...
US20130229134 DISCONTINUOUS LINEAR MOTOR SYSTEM  
A linear motor system includes a discontinuous linear motor and motor control device. The discontinuous linear motor includes a mover and a plurality of individual motors spaced from each other...
US20110109252 LINEAR SCALE, LINEAR MOTOR, AND LINEAR MOTOR CONTROLLER  
Disclosed is a linear scale for obtaining a distance from a reference point. A scale detection mechanism is adapted to output waveform signals of the same phase. Also the scale detection mechanism...
US20090302786 LINEAR STEPPING MOTOR  
A linear motor includes a stator having teeth symmetrically formed on upper and lower surfaces thereof at regular pitch; a movable member including upper cores disposed above the stator, lower...
US20050087400 Electric motor, elevator with a car movable by an electric motor, and elevator with a car and with an electric motor for movement of a guide element relative to the car  
An electric motor includes a primary part for producing a traveling magnetic field and a secondary part for providing a static magnetic field, wherein the secondary part and the primary part are...
US20100097014 Control of a linear motor  
A linear electric motor has a fixed primary comprising a stator that is divided into a number of sections, a translating secondary that has an operative length that is longer than any two adjacent...
US20140265944 LINEAR MAGNETIC MOTOR POWER GENERATION SYSTEM  
A linear magnetic motor power generation system is disclosed. Multiple linear magnetic motors mechanically provide linear forces to equiangularly situated connecting rods pivotally attached to a...
US20070296369 Thin linear, rotary, and step motor and electromagnet driver using printed coil board  
This invention first presents winding methods to make multiple printed coils on a thin multi-layered PCB. Multiple thin magnets can be laterally installed on a thin magnet board, too. Then, this...
US20090115357 Detection and Delimitation of Maximum Stator Currents  
A device for driving a magnetic levitation train has at least one controllable power supply unit that feeds at least one multi-phase power supply line, and a long stator with stator windings that...
US20110304286 BLOCK SWITCH CONTROLLER COMPRISING A CLOSED LOOP VECTOR CONTROLLER INCORPORATING A DELAY STATE HAVING A FEEDBACK GAIN  
A block switch controller for a linear motor is disclosed, the linear motor having a plurality of motor blocks, a shuttle which is propelled by the magnetic forces generated by a motor current...
US20140300992 MOTOR DRIVE DEVICE, MAGNETIC DISK STORAGE DEVICE, AND ELECTRONIC DEVICE  
A motor drive device has a spindle motor driver adapted to receive electric power from a power supply line to drive a spindle motor; an isolation switch adapted to connect and disconnect an...
US20080211436 Measuring Apparatus with a Measuring Head for Determining the Position of a Primary Part on a Secondary Part and Method for Determining the Position of a Primary Part on a Secondary Part wtih a Measuring Head  
The invention relates to a measuring apparatus comprising a sensing head (15) for determining the position of a primary part (27) on a secondary part. The sensing head (15) is fixedly connected to...
US20120091928 POSITION DETECTOR FOR MOVING MAGNET TYPE LINEAR MOTOR  
The present invention provides a position detector which can detect the position of a mover on the side of a stator, and which realizes detection with high accuracy in a moving magnet type linear...
US20060061218 Dual force wafer table  
Methods and apparatus for actuating a tubeless fine stage using E-I core actuators and voice coil motors (VCMs) are described. According to one aspect of the present invention, a stage device...
US20110210686 ELECTRIC MACHINE  
An electric machine including: a first part, being a stator or rotor/runner, including a first segment with a first number of mutually spaced poles; a second part, being a rotor/runner or stator,...
US20110306467 ELECTROMAGNETIC LOAD DEVICE FOR AN APPARATUS FOR PHYSICAL EXERCISE, AND APPARATUS PROVIDED WITH SAID DEVICE  
A load device for an apparatus for physical exercise that comprises a device that generate the load called linear motor, a micro controller, a series of sensors (dynamic, diagnostic and...
US20130237751 Linear Motor and Handheld Unit  
A linear actuator is disclosed, that comprises a stator containing more than one coil, a mover containing more than one magnet, each said magnet separated from the adjacent magnet by a spacer, a...
US20140340789 OPERATIONAL AMPLIFIER, MOTOR DRIVE DEVICE, MAGNETIC DISK STORAGE DEVICE, AND ELECTRONIC APPLIANCE  
An operational amplifier has an input stage which generates a first input current and a second input current in accordance with a first input signal and a second input signal, an offset adjuster...
US20090218963 Linear motor automatic control circuit assembly for controlling the operation of a 3-phase linear motor-driven submersible oil pump of an artificial oil lift system  
Connected to a 3-phase linear motor of a submersible oil pump of a crude oil production system, a linear motor automatic control circuit assembly is disclosed to include a linear motor power...
US20120098469 LINEAR MOTOR  
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, a stator unit including...
US20080174185 Detent Force Correcting  
An apparatus comprises a linear electromagnetic actuator which has a series of ferromagnetic poles, coils, and a series of permanent magnets to interact with the poles to induce movement of the...
US20090015181 Machine Tool with a Functional Unit Having a Linear Drive and Linear Drive for Same  
A machine tool is provided that has a linear drive by means of which a movement unit connected in motion with a functional unit is movable in two axis directions of a movement plane. The linear...
US20080048514 Linear actuator system and method  
A linear actuator system is described that includes a linear actuator, a first motor, and a second motor. The linear actuator is configured to transmit rotational motion to linear motion. The...
US20080309260 Shaft Type Linear Motor, Mounting Head and Component Mounting Device With the Linear Motor, and Position Detection Method for Shaft for Driving the Linear Motor  
A shaft type linear motor including a stator in which plural hollow cylindrical coils are disposed so that the center through holes thereof are arranged linearly so as to form a shaft insertion...
US20090021191 MOBILE ELECTRONIC APPARATUS HAVING A RECHARGEABLE STORAGE DEVICE  
A mobile electronic apparatus includes a storage device for storing electrical energy and a rotating mechanism configured to energize the apparatus. The rotating mechanism includes a motor, a...
US20090058328 Motor Driving Circuit  
A motor driving circuit for controlling a current amount flowing through a motor coil includes: a comparator configured to output a comparison signal indicating a comparison result between a set...
US20100072924 METHOD FOR CONTROLLING AC LINEAR MOTORS, DEVICE FOR DRIVING AC LINEAR MOTORS, AND SYSTEM OF AC LINEAR MOTORS  
Provided is a method for controlling a plurality of AC linear motors of identical specifications which are connected each other and operated synchronously so that they appear to operate as a...
US20090218964 DRIVING APPARATUS, INDUSTRIAL INSTRUMENT, EXPOSURE APPARATUS, AND DEVICE MANUFACTURING METHOD  
A driving apparatus which electrically drives a component built in an industrial instrument, comprises a housing including a supply inlet and an exhaust outlet, a fan configured to form an air...
US20080067968 Identifying and compensating force-ripple and side-forces produced by linear actuators  
Methods are disclosed for operating at least one commutated actuator (generally termed a “linear actuator”) while compensating for error-inducing phenomena such as force-ripple and side-force. An...
US20090102403 VCM CONTROL CIRCUIT  
A method of controlling a moving part of a voice coil motor to move from an first position to a second position, wherein the position of the moving part is controlled by the level of an electrical...
US20080265825 High-Current High-Resolution Driving Circuit  
The present invention discloses a high-current high-resolution driving circuit comprising a controller, a digital-to-analog converter and a voltage-to-current converter. The controller is provided...
US20140333236 LINEAR MOTOR DEVICE AND METHOD FOR CONTROLLING LINEAR MOTOR DEVICE  
A linear motor device includes a linear motor and a control unit configured to apply a load to a pressurizing object by causing a movable part of the linear motor to move. After causing the...
US20090091276 Linear motor and method for operating a linear motor  
A linear motor includes a primary part arranged as a guideway stator and at least one secondary part that is movable with respect to the primary part, the at least one secondary part having...
US20120139455 DISTRIBUTED-ARRANGEMENT LINEAR MOTOR AND CONTROL METHOD OF DISTRIBUTED-ARRANGEMENT LINEAR MOTOR  
A distributed-arrangement linear motor in which stators are arranged in a distributed manner and a method of controlling the distributed-arrangement linear motor are provided. The linear motor 1...
US20090195195 Position Feedback Device for a Linear Motor  
A position feedback device for a linear motor comprises three linearly-arranged Hall sensors. The three Hall sensors are connected to a mover, respectively. The direction in which the Hall sensor...
US20130119897 Controlled Motion System  
A controlled motion system having a plurality of movers controlled as they travel along both smart and simple sections of a track. The controlled motion system comprises a control system for...
US20110163769 METHODS OF DETERMINING MID-STROKE POSITIONS OF ACTIVE MATERIAL ACTUATED LOADS  
Systems for and methods of determining at least one mid-stroke position of an active material actuated load by causing a stress induced rapid change in electrical resistance within the active...
US20100044144 Circular-Shaped Linear Synchronous Motor, Electromagnetic Suspension and Motor-Driven Steering Device Using the Same  
Disclosed are a high-damping and high-thrust cylindrical linear motor and a motor-driven power steering device. A stator includes three-phase stator and a stator core. A slider includes a slider...

Matches 1 - 50 out of 144 1 2 3 >