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| Number | Title | Issue Date |
| 8188697 | Apparatus and method for driving a motor A sampling circuit samples, while running a motor at a predetermined rotational speed, over a predetermined period a back electro-motive force induced at one end of at least one phase coil, with one end of each phase coil of the motor being brought to a high impedan... | 05/29/2012 |
| 8098038 | Servomotor control system enabling high-speed oscillating motion to be highly precise A servomotor control system that includes a numerical control unit and servo control unit enables the use of learning control based on an angle synchronization method in high-speed oscillating motion performed by, for example, a jig grinder. The numerical control un... | 01/17/2012 |
| 8093853 | Device-positioning pedestal and handler having the device-positioning pedestal A device-positioning pedestal capable of positioning devices of different sizes. The device-positioning pedestal comprises a plurality of guide members corresponding to the sides of the device and coming in contact with the sides of the device to position the device... | 01/10/2012 |
| 8067916 | Power cutting tool with synchronized dust control device A cutting tool such as a miter saw, arranged to have an arrangement for selectively making and breaking power of a first circuit and an independent second second circuit each connected respectively to a first motor operating the cutting tool and to a second motor op... | 11/29/2011 |
| 8049454 | Rough and fine movement device, and liquid supply device incorporating the same A rough and fine movement device capable of moving a mobile body with high accuracy, and a liquid supply device incorporating such a device. First and second mobile bodies are movable along guide members with a connection member connecting the mobile bodies in a rel... | 11/01/2011 |
| 7973508 | Automation systems diagnostics and predictive failure detection The present invention discloses a system and method for monitoring and diagnosing a robot mechanism. This requires adding intelligence to the diagnostics by parameters of physical robot arm linkages respecting component relative rotation or load transfer; storing ro... | 07/05/2011 |
| 7932689 | Motor drive system for driving motor provided with a plurality of windings A motor drive system is provided with a plurality of axis control parts for outputting PWM commands using a position command, a plurality of current supply parts which supply current to the respective windings based on the PWM commands of the respective axis control... | 04/26/2011 |
| 7915848 | Servo control apparatus that performs dual-position feedback control A servo control apparatus that performs dual-position feedback control and thereby achieves a reduction in position error according to the purpose of machining. The servo control apparatus includes: a first position detector for detecting the position of a motor; a ... | 03/29/2011 |
| 7893642 | Driving apparatus A driving apparatus (100p, 100s) is provided with: a base portion (110); a stage portion (130) on which a driven object (12) is mounted and which can be displaced; an elastic portion (120) which has elasticity ... | 02/22/2011 |
| 7888899 | Substrate splitting apparatus and a method for splitting a substrate A substrate splitting apparatus and a method for splitting a substrate using the substrate splitting apparatus are provided. The substrate splitting apparatus includes a servo motor, a transmission device, a substrate breaking bar, and a stage. One end of the transm... | 02/15/2011 |
| 7868574 | Motor absolute position signal processing apparatus A motor absolute position signal processing apparatus connected to a signal processor and an optical encoder of a motor control system includes first and second switches, a signal integration amplifier, first and second separators and an inverter. The first switch i... | 01/11/2011 |
| 7868575 | Aperture driving apparatus and projection type image display apparatus An aperture driving apparatus includes a swing unit and a stationary unit. The swing unit includes an aperture plate that partially blocks a light, a coil that constitute a voice coil motor for obtaining a driving force for driving the aperture driving plate, and a ... | 01/11/2011 |
| 7782003 | Positional indicia misplacement compensation Apparatus and method for compensating for positional indicia misplacements in the positioning of a control object, such as with servo seam misplacements on a data storage device storage medium. An actual position for the control object is determined in relation to a... | 08/24/2010 |
| 7772795 | Motor position signal processing apparatus A motor position signal processing apparatus electrically connected to a signal processor and an optical encoder of a motor control system includes a first switch, a second switch, a first signal integration amplifier, a first separator, a second signal integration ... | 08/10/2010 |
| 7719221 | Servo control apparatus A servo control apparatus includes a motor including a motor shaft, the motor for driving a drive subject; a detecting section that detects a rotation position of the motor shaft; and a control system configured to generate a motor torque command for the motor using... | 05/18/2010 |
| 7710059 | Method of optimizing servo controller power in two-dimensional flexure MEMS storage device A method of optimizing a servo controller power required in the operation of two-dimensional flexure (Microelectronic Memory Storage) MEMS devices. Furthermore, provided is an arrangement for optimizing servo controller power in a two-dimensional flexure MEMS storag... | 05/04/2010 |
| 7705552 | Robotic system A robotic system is provided that enables easy manipulation and various operations. A walking operation allocated to a manipulated switch operation section is performed. Meanwhile, the right ankle roll axis control motor, the left ankle roll axis control motor, righ... | 04/27/2010 |
| 7675256 | Controller for DC brushless motor integrated with a high voltage control system Taught herein is a controller for a direct current brushless motor connected to a high voltage control system, comprising a microprocessor and an input/output interface circuit connected between the high voltage control system and the microprocessor; wherein the inp... | 03/09/2010 |
| 7649330 | Low-power pulse-width-modulated retract of disk drive actuator A disk drive system including retract logic for control of the voice coil motor in a retract operation, in which the voice coil motor positions the read/write head actuator arm in a safe place in a loss-of-power event, is disclosed. The retract logic includes circui... | 01/19/2010 |
| 7638963 | Rotary indexing table driven by an induction motor The present invention is a rotary indexing table driven by an induction motor. The rotary indexing table includes a rotatable work supporting platform, an AC induction motor including a motor shaft coupled to the rotatable work supporting platform; and a controller ... | 12/29/2009 |
| 7638964 | Machine having movable unit to be controllably driven by servo motor A speed region of a motor is divided into a region lower than a first switch speed VS1, a region higher than a second switch speed VS2 and a region between the first and second switch speeds. An abnormal load determination level to be compared with an ... | 12/29/2009 |
| 7638965 | Motor control apparatus A velocity control loop of a motor control apparatus including a notch filter. The notch filter attenuates a signal component at a central frequency from a motor driving command, and outputs the attenuated motor driving command. The driving of a motor is controlled ... | 12/29/2009 |
| 7635961 | Position detecting apparatus having electric motor and method for detecting position A reference position detecting apparatus includes an electric motor and a motor control unit. The electric motor includes a plurality of first coils and a plurality of second coils. The electric motor further includes a rotor that rotates when at least one of the pl... | 12/22/2009 |
| 7541763 | Servo control device A servo control device includes a current supply unit for supplying a drive unit with a drive current for driving a target to be controlled; a first detector for detecting at least the drive current value; and a logical arithmetic section which introduces a current ... | 06/02/2009 |
| 7535192 | Head positioning control method, head positioning control device and disk apparatus A positioning control device executes disturbance observer control having a disturbance suppression function, wherein changes of control characteristics are prevented even if the disturbance frequency is suppressed. When a control value of an actuator is computed us... | 05/19/2009 |
| 7528565 | Signal processing device, signal processing method, signal processing program, recording medium storing the program, speed detector and servomechanism A signal processing device processes a position information signal (A sinθ, A cosθ) output from a sensor in accordance with a driving position of a motor and detects a driving speed of the motor. The signal processing device includes a position information signal ... | 05/05/2009 |
| 7479750 | Controller for electric motor A controller including a learning control unit for determining learning data based on a positional deviation between a target-position command commanding superimposed-type motion including repetitive motion and a positional fed-back variable obtained from an output ... | 01/20/2009 |
| 7463000 | Motor controlling method, motor controlling apparatus, and recording apparatus A method of controlling, by an adaptive control method, an electric motor as a drive source of an operating apparatus that operates, based on a driving force produced by the electric motor, under an arbitrary one of a plurality of operating conditions, and exhibits ... | 12/09/2008 |
| 7456595 | Method and apparatus for adaptive control of a disk drive in the presence of non-linear magnetic bias According to a preferred aspect of the instant invention, there is provided a system and method of moving a disc drive arm in the presence of nonlinear magnetic bias. Further, in another preferred embodiment the instant method will be adaptive and/or self-corrective... | 11/25/2008 |
| 7453226 | Synchronized rear vision system A synchronized rear vision system for a vehicle includes a pair of external side rearview mirrors for attachment to the vehicle and an interior rearview mirror for attachment to the vehicle. The synchronized rear vision system also includes a system master controlle... | 11/18/2008 |
| 7449857 | Servo control device An object of the invention is to provide a servo control device capable of making zero the positional deviation the positional deviation at a constant speed as well as the positional deviation at a constant acceleration or at constant acceleration and jerk, thereby ... | 11/11/2008 |
| 7439694 | Adjustable lectern system An adjustable lectern includes a base portion having a tubular upstanding base member and a tubular upstanding tower member that is mounted in a telescoping arrangement with respect to the base member. The base member and the tower member are each respectively forme... | 10/21/2008 |
| 7439693 | Anomaly detection method and motor control device A control unit of a motor driver performs feedback control to supply current to a linear motor based on a detection value of a linear encoder. An anomaly detection unit monitors the supply current to the linear motor, and the anomaly detection unit detects anomaly o... | 10/21/2008 |
| 7436135 | Method for controlling stage apparatus At least one exemplary embodiment is directed to a control method for controlling a stage apparatus including a base and a stage, the base including first and second coil phases, the stage including a plurality of magnets. The control method includes a first energiz... | 10/14/2008 |
| 7436617 | Controller, state estimator and methods for use therewith A controller is disclosed that can be used in controlling a drive device of a disk drive, or other systems, in the presence of sinusoidal disturbances. The controller includes a calibration module that generates a plurality of reference states for a reference region... | 10/14/2008 |
| 7432681 | Scanner system A scanner system includes a servo control unit. A rotation angle of a rotating shaft supporting a mirror is detected, and an error of the detected value with respect to a commanded value is integrated by an integral compensator so that the detected value is able to ... | 10/07/2008 |
| 7432680 | Circuit and method for controlling motor A motor control circuit for reducing current consumption. A stepping motor control circuit includes an A/B phase current setting signal generation circuit for generating an A/B phase current signal setting signals provided to a stepping motor driver to supply a step... | 10/07/2008 |
| 7427846 | Method of optimizing servo controller power in two-dimensional flexure mems storage devices A method of optimizing a servo controller power required in the operation of two-dimensional flexure (Microelectronic Memory Storage) MEMS devices. Furthermore, provided is an arrangement for optimizing servo controller power in a two-dimensional flexure MEMS storag... | 09/23/2008 |
| 7425810 | Disk drive management Arrangements and methods for implementing a “spin-down policy” for HDD motors that is “smart”, flexible and admirably achieves an objective of ensuring prolonged motor life as just discussed. To this end, one specific implementation involves (among other thi... | 09/16/2008 |
| 7423404 | Sample-loading system and anti-collision device and anti-collision method thereof Some embodiments of the present invention provide an anti-collision device used for a sample-loading system. This device may include a code plate, an optical coupler, a location signal-detecting unit, a drive pulse counting unit and a drive pulse-sending unit. The o... | 09/09/2008 |
