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| Number | Title | Issue Date |
| 8080967 | Brushless electric machine The brushless electric machine includes a first drive member (30U) having a plurality of permanent magnets (32U); a second drive member (10) having a plurality of electromagnetic coils and capable of movement relative to the first drive member (... | 12/20/2011 |
| 7906930 | Brushless electric machine The brushless electric machine includes a first drive member (30U) having a plurality of permanent magnets (32U); a second drive member (10) having a plurality of electromagnetic coils and capable of movement relative to the first drive member (... | 03/15/2011 |
| 7906925 | Electric motor, drive system employing multiple electric motors, and method for controlling the same The motor according to one aspect of the present invention has an output waveform correcting unit for correcting the waveform of the output signal of a magnetic sensor during operation of the electric motor. ID codes for identification purposes are assigned respecti... | 03/15/2011 |
| 7876062 | Brushless electric machine and apparatus using the same A first member has a magnet assembly that includes at least one permanent magnet pair, and a second member includes an electromagnetic coil. A control circuit controls the supply of power to the electromagnetic coil as well as regeneration of power from the electrom... | 01/25/2011 |
| 7872437 | Method for position and/or speed control of a linear drive A method for position and/or speed control of a linear drive utilizing a converter having a control unit and being coupled to a motor of the linear drive. The method includes determining, in a sensor-free manner, a motor position, generating a motor position signal,... | 01/18/2011 |
| 7830109 | Method of setting the origin of a linear motor A movable member is moved in a preset direction in a linear motor. A characteristic-change position-detecting unit detects a position where the magnetic characteristic of the magnets has abruptly changed. The position detected is used as an origin-setting reference ... | 11/09/2010 |
| 7492117 | Electromagnetic variable degrees of freedom actuator systems and methods The present invention provides a variable reluctance actuator system and method that can be adapted for simultaneous rotation and translation of a moving element by applying a normal-direction magnetic flux on the moving element. In a beneficial example arrangement,... | 02/17/2009 |
| 7416130 | Precise transport positioning apparatus using a closed loop controlled, non-direct drive or friction drive system with absolute positioning encoder An apparatus for positioning a workpiece carrier with respect to a workstation can include an encoder reader located in a fixed position at a workstation for generating a signal in response to interaction with at least one encoder strip, a workpiece carrier movable ... | 08/26/2008 |
| 7402966 | Linear drive with travel measurement The invention concerns a linear drive (1) with a linear stroke for the displacement of movably supported parts, in particular of articles of furniture, comprising a rotary spindle (2) which is driven by a motor and which at the drive output side is in ... | 07/22/2008 |
| 7385370 | Driving apparatus, exposure apparatus, and device manufacturing method A driving apparatus for moving an object. The apparatus includes a first actuator which drives the object in X and Y directions, a second actuator which drives a reaction force counter which receives a reaction force generated when the first actuator drives the obje... | 06/10/2008 |
| 7385363 | Linear motor having progressive movement control In a linear motor and its progressive motion or motion control, e.g., for modular transport devices with straight and curved route sections forming a route course, extensive modularity or flexibility of the linear motor may be guaranteed with little expenditure in t... | 06/10/2008 |
| 7370684 | Door shutter mechanism A stacking mechanism for shutter members of a shutter mechanism, comprising: a rotatable screw with external thread of length L and pitch P1; a plurality of N traveling nuts mounted on the screw, having internal thread of pitch P1 and external thread o... | 05/13/2008 |
| 7348745 | Controller First and second acceleration detectors are attached to first and second sections on a driven body, and values of accelerations α1 and α2 in a travel direction of the driven body are detected. On the basis of the difference or sum of the acceleration... | 03/25/2008 |
| 7336007 | System and method to control a rotary-linear actuator A system and method are disclosed for controlling an integrated rotary-linear actuator system that may be coupled to a network via a network interface. The integrated rotary-linear actuator system includes a control system and a rotary-linear actuator having a movea... | 02/26/2008 |
| 7319303 | Method and apparatus for estimating the position of a moving part of a linear actuator A method and an apparatus for estimating the position of a moving part of a linear actuator are provided. The method comprises the following steps. Move the moving part towards a target position. Receive magnetic signals generated by the magneto-resistive sensor of ... | 01/15/2008 |
| 7316700 | Self optimizing lancing device with adaptation means to temporal variations in cutaneous properties A lancing device, an embodiment of which controls the advancement and retraction of a lancet by monitoring the position of the lancet in conjunction with a lancet controller which incorporates a feedback loop for modulating the lancet driver to follow a predetermine... | 01/08/2008 |
| 7304448 | Developing apparatus and image processing system with the developing apparatus A developing apparatus is capable of moving a stage for supporting a substance to be developed from a detachable position to a developing area below a developing unit, and two-dimensional movement. The present developing apparatus includes a developing device, a fir... | 12/04/2007 |
| 7294906 | Wiring technique An apparatus for supplying electrical power to a movable member. The apparatus includes a fixed member, the movable member moving relative to the fixed member, a flexible wiring member having an end connected to the movable member and another end connected to the fi... | 11/13/2007 |
| 7292314 | Exposure device with spatial light modulator and neutral density filters Exposure device for writing mixed data onto a photosensitive support comprising: a light source (10), supplying an exposure light; a first two-dimension pixel matrix modulator (50), and a neutral optical filter means (12) having at least two dif... | 11/06/2007 |
| 7288863 | Electric appliances having electric motors for driving oscillatory elements an electric appliance includes an electric motor having a first oscillatory element, a second oscillatory element and an electric coil configured to generate a magnetic field to drive the first and second oscillatory elements. The electric appliance also includes a ... | 10/30/2007 |
| 7282874 | Alignment apparatus, exposure apparatus, and device manufacturing method An alignment apparatus which moves a object comprises a first structure having a holding member which holds the object, a second structure having a magnet which constitutes a linear motor, the linear motor drives the first and second structure, and a flow passage fo... | 10/16/2007 |
| 7268504 | Stator position feedback controller Stator position feedback controller. A first position monitoring device responds to the position of a stator supported for relative motion by a machine base. A second position monitoring device responds to the position of a carriage with respect to the machine base.... | 09/11/2007 |
| 7262523 | Wireless encoder A wireless encoder system facilitates operation and control of a motor, such as linear motor. The system includes an encoder sensor moveable with a first part of the motor. The encoder sensor is operative to sense movement of the first part relative the second part ... | 08/28/2007 |
| 7262575 | Method and apparatus for precise positioning of an object with linear stepper motors Methods and apparatus for precise positioning of an object using linear actuators based on linear stepper motors operating in microstepping or full step mode, a control algorithm based on compensation table, and a calibration apparatus for obtaining the compensation... | 08/28/2007 |
| 7245092 | Alignment stage apparatus, exposure apparatus, and semiconductor device manufacturing method An alignment stage apparatus including a vacuum chamber, a linear motor including a plurality of coils to drive a stage, a coil selector which selectively energizes the plurality of coils, and a storage box arranged to store the coil selector. The interior of the st... | 07/17/2007 |
| 7245103 | Motor speed and position control A method of controlling the speed and position of a motor includes receiving a pulse train indicative of the speed of the motor, and a periodic signal at a frequency greater than the pulse train. The number of cycles of the periodic signal per cycle of the pulse tra... | 07/17/2007 |
| 7233119 | Method and circuit arrangement for the sensorless determination of load states of synchronous linear motors The invention relates to a method and to a circuit arrangement used to regulate synchronous linear motors, especially linear drive mechanisms in film drawing systems. The force (Fclip) between the stationary primary part and the moved secondary part is de... | 06/19/2007 |
| 7224252 | Adaptive magnetic levitation apparatus and method A magnetic levitation system, includes a base module having a plurality of coils spaced in a matrix configuration. The system also includes a platform module having a plurality of focusing magnets and a plurality of lifting magnets. Activation of the plurality of co... | 05/29/2007 |
| 7218017 | System and method to control a rotary-linear actuator A system and method are disclosed for controlling an integrated rotary-linear actuator system that may be coupled to a network via a network interface. The integrated rotary-linear actuator system includes a control system and a rotary-linear actuator having a movea... | 05/15/2007 |
| 7215095 | Driving apparatus, exposure apparatus, and device manufacturing method A driving apparatus for moving an object. The apparatus includes a first actuator which drives the object in X and Y directions, a second actuator which drives a reaction force counter which receives a reaction force generated when the first actuator drives the obje... | 05/08/2007 |
| 7216003 | Hi-accuracy three-dimensional topographic modeling apparatus A cutting apparatus includes a hi-accuracy three-dimensional cutting apparatus for topographic modeling that is electronically coupled with a computer. The computer has a central processor that executes instructions, a memory for storing instructions to be executed,... | 05/08/2007 |
| 7205734 | Control device for vehicular opening/closing body A control device for a vehicular opening/closing body is provided with a duty ratio calculator (78), which calculates a duty ratio when power supplied to a door drive motor (48) allowing an opening/closing body to open/close is subjected to duty contro... | 04/17/2007 |
| 7202937 | Balanced positioning system for use in lithographic apparatus A balanced positioning apparatus comprises a balance mass which is supported so as to be moveable in the three degrees of freedom, such as X and Y translation and rotation about the Z-axis. Drive forces in these degrees of freedom act directly between the positionin... | 04/10/2007 |
| 7198141 | Shock absorbing apparatus in a positioning apparatus A shock absorbing apparatus in a positioning apparatus including a stage apparatus is disclosed. The positioning apparatus includes a main body apparatus for mounting the stage apparatus thereto, and a chamber for maintaining a region, in which the stage apparatus i... | 04/03/2007 |
| 7199493 | Alignment stage apparatus An alignment stage apparatus includes a base structure and a movable stage which can move along a surface of the base structure so as not to be in contact with the base structure. The apparatus includes a plurality of power transmission coils buried under the surfac... | 04/03/2007 |
| 7188348 | Optical disc drive apparatus and method An optical pickup unit (OPU) includes a moveable structure that is moved by a voice coil motor component in response to an input signal. The moveable structure includes a pattern that is moved corresponding to the input signal. An encoder reads the pattern to genera... | 03/06/2007 |
| 7187142 | Motor drive with velocity noise filter A drive unit for controlling a motor includes a position feedback device and a velocity noise filter. The position feedback device is operable to generate a position signal relating to a position of the motor. The velocity noise filter is coupled to the position fee... | 03/06/2007 |
| 7184254 | Apparatus and method for controlling the maximum stroke for linear compressors An apparatus and method for controlling the maximum stroke of a linear compressor is provided. The shorting of the normal supply voltage of a compressor to ground is used to detect overstroking. A plurality of transistors are electrically coupled to the control circ... | 02/27/2007 |
| 7181296 | Method of adaptive interactive learning control and a lithographic manufacturing process and apparatus employing such a method By applying time-frequency analysis to a given standard iterative learning control or ILC an adaptive filter for the learned feed-forward loop is designed. This time varying filter varies according to the momentary frequency content of the error signal and allows to... | 02/20/2007 |
| 7170241 | Path module for a linear motor, modular linear motor system and method to control same A path module for a linear motor system includes a controller coupled to one or more amplifiers that are operative to control associated windings in the module. The controller receives control information via a communications link. The controller controls the amplif... | 01/30/2007 |
