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| Number | Title | Issue Date |
| 8138698 | Motor rotation irregularity detection circuit A motor rotation irregularity detection circuit includes a first integrator for integrating a rotation detection signal that is output from a driver of a sensor-less motor; a differentiator for outputting a difference between a binary signal based on the integral in... | 03/20/2012 |
| 8049457 | Press machine controller A press machine controller (10) for controlling a press machine (30) having a servo motor (41) to drive a slide (38) via a reduction mechanism (37) changed in reduction ratio in accordance with the position of the slide (38)... | 11/01/2011 |
| 7816881 | Method and apparatus for utilizing commutation sensors for speed and position control One or more magnets are mounted on the rotor of a motor/actuator and analog Hall Effect sensors are mounted on the stator of the motor actuator to provide the necessary feedback for both speed and position control of the rotor. The feedback system includes signal co... | 10/19/2010 |
| 7800334 | Drive system The invention relates to a drive system comprising a control unit (1), which is connected to drive units (3a, 3b, 3c, 3d, 3e, 3f, 3g) via a data bus (2) f... | 09/21/2010 |
| 7583044 | Servo system for a two-dimensional micro-electromechanical system (MEMS)-based scanner and method therefor A servo control system micro-electromechanical systems (MEMS)-based motion control system (and method therefor), includes a motion generator having an inherent stiffness component. ... | 09/01/2009 |
| 7541767 | Decentralized error response in cam disk axes The invention relates to a method for error response when an error occurs in response to a motion, particularly of a drive mechanism in a machine, the motion taking place while using at least one master axis and at least one cam disk having at least one input and on... | 06/02/2009 |
| 7466101 | Head position control method, head position control device, and disk device A positioning control device based on an observer control has a disturbance suppression function to which a disturbance suppression function is added without affecting the control characteristics of the observer. Models of an actuator and a disturbance model are sep... | 12/16/2008 |
| 7421301 | Speed-variable maximum delay clamping when using variable-delay random PWM switching A control system and a method of using the same for an electric machine having a random number generating module generating a random number ranging from a first value to a second value, a multiplying module multiplying the random number and a sample rate to generate... | 09/02/2008 |
| 7421359 | Detecting back electromotive force voltage A Bemf detect circuit is configured for modeling Bemf error via calculation of time correlations associated with two or more different non-calibrated sense resistor gain values to derive a calibrated sense resistor gain value. A method is provided for calibrating a ... | 09/02/2008 |
| 7408317 | Apparatus having a motor, controller for the motor, and method of controlling the motor A method, and a system of using the method, of controlling a motor having a rated capacity. The method includes determining the motor has been started, determining a plurality of operating parameters of the motor after the motor has started, determining a threshold ... | 08/05/2008 |
| 7394218 | Servo system for a two-dimensional micro-electromechanical system (MEMS)-based scanner and method therefor A servo control system micro-electromechanical systems (MEMS)-based motion control system (and method therefor), includes a motion generator having an inherent stiffness component. ... | 07/01/2008 |
| 7375478 | Servo drive with high speed wrapping function A servo drive with high speed wrapping function is applied for servo control of wrapping wire and method for the same. The servo drive includes a wrapping mechanism, a rotation control unit for controlling rotation of the wrapping mechanism, a lateral motion control... | 05/20/2008 |
| 7365512 | System for directing moving object A moving-object directing system for directing a moving object to a target location includes: a moving-object directing unit and a moving object. The moving-object directing unit includes: a directing signal transmitter for generating a first moving-object directing... | 04/29/2008 |
| 7362071 | Rotation control device, rotation control method and construction machine In an electric rotary excavator (construction machine) 1, when earth pressure acts on a rotary body 4 in an opposite direction to an instructed direction of a lever, a control-system changing means 150 of a rotation control device 100 inc... | 04/22/2008 |
| 7348897 | Apparatus for transmitting position detection signal of multi-shaft motor An apparatus for transmitting a position detection signal of a multi-shaft motor whereby a parallel-form detection signal that is output from position-detecting devices disposed on each of a plurality of motors and used for indicating a motor rotation position can b... | 03/25/2008 |
| 7323843 | Method and device for treating signals for detection of stator and rotor errors in magnetic circuits in a synchronous machine It is possible to determine the types and values of stator and rotor errors in magnetic circuits in a synchronous machine by measuring the induced voltage (ui) for the terminals of measurement loops which can capture an image of the induction in the measu... | 01/29/2008 |
| 7321217 | Servo system for a two-dimensional micro-electromechanical system (MEMS)-based scanner and method therefor A servo control system micro-electromechanical systems (MEMS)-based motion control system (and method therefor), includes a motion generator having an inherent stiffness component. ... | 01/22/2008 |
| 7304816 | Disc drive failure prediction In a method for predicting failure of a disc drive during operation of the disc drive, a write fault count is maintained that corresponds to write faults encountered during write operations to a disc of the disc drive. Additionally, a frequency domain representation... | 12/04/2007 |
| 7285932 | Method and apparatus for loss of control inhibitor systems Active and adaptive systems and methods to prevent loss of control incidents by providing tactile feedback to a vehicle operator are disclosed. According to the present invention, an operator gives a control input to an inceptor. An inceptor sensor measures an incep... | 10/23/2007 |
| 7285933 | Method and apparatus for loss of control inhibitor systems Active and adaptive systems and methods to prevent loss of control incidents by providing tactile feedback to a vehicle operator are disclosed. According to the present invention, an operator gives a control input to an inceptor. An inceptor sensor measures an incep... | 10/23/2007 |
| 7259933 | Velocity control system for an actuator assembly A method for generating a velocity command for an actuator assembly is provided. The actuator assembly includes an actuator arm, which is to move over a plurality of surfaces. The method begins by providing a compensation torque for each of the plurality of surfaces... | 08/21/2007 |
| 7254514 | Method and system for predicting remaining life for motors featuring on-line insulation condition monitor A method and a system for determining a remaining time before failure of a motor system are provided. The method and the system determine the remaining time before failure based on historical motor data and operational parameter data associated with the motor system... | 08/07/2007 |
| 7248014 | Motor control system A motor control system capable of securing stability and rapidity of motion even in a machine where the stability varies in accordance with a position of a driven member. The driven member and a motor for driving the driven member are operatively connected through a... | 07/24/2007 |
| 7224139 | Servo driver and encoder signal processing IC A servo driver (3) includes: an input section (11) for input-specifying the type of an encoder (7) at the side of an actuator (2); a control section (13) for generating a control signal (12) according to the type input; and ... | 05/29/2007 |
| 7209004 | DB-linear variable gain amplifier (VGA) stage with a high broad band The invention relates to a VGA stage having a novel circuit configuration for amplifying/attenuating a differential input signal which is transmitted via a transmission line (H). The VGA stage comprises an operational amplifier (OPV1, OPV2), which is c... | 04/24/2007 |
| 7206659 | Numerical controller A numerical controller capable of obviating the waste of a workpiece by machining such that a position deviation by learning control is converged and automatically performing storage of correction data and actual machining. A tool and the workpiece are moved to noni... | 04/17/2007 |
| 7187153 | Motor-driven power steering apparatus In a motor-driven power steering apparatus, a plurality of rotational position detecting sensors are provided in an electric motor, and during an abnormality in any one rotational sensor, the electric motor can be driven by using a detected result of any other one r... | 03/06/2007 |
| 7183738 | Motor control device A speed control means 7 for outputting a drive command signal for a motor 1 to make the speed of the motor 1 conform to the speed command signal based on a signal indicating the difference between the speed command signal and the detected speed ... | 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 |
| 7157876 | Motor magnetic pole position estimation device and control device It is an object of the invention to provide an apparatus for estimating a magnetic pole position of a motor in which the amplitudes of high-frequency currents can be adjusted. In the invention, a controlling apparatus for driving a motor (1-1) b... | 01/02/2007 |
| 7157877 | Brushless motor driving device A brushless motor driving device having a current detecting unit for detecting a phase-current of a brushless motor, a voltage detecting unit for detecting a phase voltage of the brushless motor, and a signal input portion to which the detection value of the phase-c... | 01/02/2007 |
| 7148648 | Controller for controlling actuator device installed on vehicle so as to maintain silence and comfort in vehicle A controller for controlling an actuator device which is installed on a vehicle and operated by a motor. The controller includes: a motor control portion operable to control the motor on the basis of a target value; and a target-value determining portion operable to... | 12/12/2006 |
| 7138782 | Motor control system and method of the same The present invention provides a motor control system and method thereof. The motor control system comprises a motor controller and a compensation device. The motor controller is used for generating a motor control output according to a reference signal and a first ... | 11/21/2006 |
| 7129665 | Control apparatus for feed driving system A control apparatus for a machine that can be operated at high precision in a stable control state is provided by driving a movable body with control parameters suited to the mechanical state. A control parameter calculation circuit is provided to obtain control par... | 10/31/2006 |
| 7129668 | Actuator control unit An actuator control device includes an electrical control unit for detecting the present positions of output shafts of servo motors, and communicating with control circuits for driving the output shafts of the servo motors to target stop positions on the basis of th... | 10/31/2006 |
| 7122990 | Digital servo motor controller IC design for preventing the power feedback effect during manual adjusting the servo motor The present invention provides an improvement design for a digital servo motor controller IC to prevent the power feedback effect during manual adjusting the servo motor. A circuit is added at each output of the digital servo motor controller IC. The added circuit c... | 10/17/2006 |
| 7119511 | Servo system for a two-dimensional micro-electromechanical system (MEMS)-based scanner and method therefor A servo control system for a micro-electromechanical systems (MEMS)-based motion control system (and method therefor), includes a motion generator having an inherent stiffness component. ... | 10/10/2006 |
| 7102317 | Method and apparatus to process an analog encoder signal A method and apparatus to process an analog encoder signal. The apparatus includes an analog encoder pattern generating unit, an analog encoder pattern storage unit, a digital/analog converting unit, a comparing unit, a recent state latch unit, a present state deter... | 09/05/2006 |
| 7102318 | Servo motor with a built-in drive circuit A servo motor with a built-in drive circuit in which a sensor circuit portion, a drive control circuit portion, and a motor drive circuit are collectively provided on two boards, thereby achieving simplification and a reduction in the size of the circuit configurati... | 09/05/2006 |
| 7086243 | Setting device of a force feedback type A setting device of a force feedback type has an operating unit commonly used to set a plurality of control items of an electronic device. To provide a different sensation to the operating unit depending on the control items, a force feedback pattern for an airflow ... | 08/08/2006 |
