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| Number | Title | Issue Date |
| 7068923 | Speed control apparatus of motor A speed control apparatus includes a speed control part 12 for generating a source current command based on a difference between a speed command of a motor 4 and speed detection in which a speed of the motor 4 for driving a load 2 is dete... | 06/27/2006 |
| 7068455 | Method and system for reducing power consumption in a rotatable media data storage device Methods and systems in accordance with embodiments of the present invention can provide for reduced power consumption in rotatable media data storage devices. A voice coil motor or spindle motor driver configured to operate as a linear driver can be operated in a qu... | 06/27/2006 |
| 7064509 | Apparatus for DC motor position detection with capacitive ripple current extraction An apparatus for determining angular positions of DC motor includes a capacitor connected in parallel with the DC motor. The current flowing through the capacitor, at any given time, is an AC ripple current responsive to a commutation event of the DC motor. The capa... | 06/20/2006 |
| 7064512 | Positioning apparatus, exposure apparatus, and semiconductor device manufacturing method A positioning apparatus includes an X stage, a linear motor (X-axis) which drives the X stage along the X-axis, a linear motor (Y-axis) which drives a Y stage along the Y-axis, a laser interferometer which detects position information of the stages along the X and Y... | 06/20/2006 |
| 7061714 | Disk drive modifying estimated seek times for a rotational position optimization algorithm based on change in estimated seek time parameter A disk drive is disclosed comprising a disk, a head, and a voice coil motor (VCM) for actuating the head over the disk. The disk drive executes a rotational position optimization (RPO) algorithm to select a next command to execute relative to an estimated seek time ... | 06/13/2006 |
| 7062160 | Monitoring current in a motor during acceleration to verify motor frequency lock Method and apparatus for accelerating a motor from an intermediate velocity to a final operational velocity. The motor is accelerated from rest to the intermediate velocity through application of fixed duration drive pulses to the spindle motor. Once the motor reach... | 06/13/2006 |
| 7062334 | Positioning control method, positioning control device, and electronic component mounting apparatus using same There are provided a positioning control method and a positioning control device, which enables high speed positioning with low power consumption without repeating two or more acceleration and deceleration operations during travel from an original position to a targ... | 06/13/2006 |
| 7058998 | Foot control A foot control for controlling power-driven functions of a medical apparatus which positions a patient in a variety of examination and treatment positions. The foot control includes a membrane switch and a flexible keypad overlying the membrane switch. The flexible ... | 06/13/2006 |
| 7061202 | Automobile servomotor controller An automobile servomotor controller includes a master control unit having a master control circuit for transmitting a designation signal and a slave unit having a motor and a control circuit which controls driving of a motor by outputting an operation signal to a dr... | 06/13/2006 |
| 7057843 | Disk drive control circuit and method A servo control circuit provides seamless transition between seek and track modes while enabling both rapid seek mode operation and accurate tracking. The control circuit includes an analog-to-digital converter having a non-linear characteristic. The non-linear char... | 06/06/2006 |
| 7057366 | Method for estimating load inertia and a system for controlling motor speed using inverse model A method for estimating load inertia and system for controlling motor speed using inverse model are provided, suitable for an alternating current (AC) servo module. An inverse system is connected to an actual system to inversely deduce a substantial torque output, w... | 06/06/2006 |
| 7053583 | Brushless DC motor control A method and control system to control a brushless DC motor to a preferred position is provided. The advantages that accrue to a system employing the method and apparatus to control the brushless DC motor to a preferred position include optimizing response time, ene... | 05/30/2006 |
| 7054090 | Data storage device, recording medium, servo writing method, and data reading/writing method Disclosed is a data storage device to provide servo patterns of a track pitch individually consistent with head characteristics (writing width, and reading width) in a recording medium of a hard disk device. The data storage device is provided with a disk having pit... | 05/30/2006 |
| 7054094 | Real-time automatic loop-shaping for a disc drive servo control system An apparatus and method for improving servo loop performance in a disc drive storage system are provided. The servo loop includes a voice coil motor actuator that moves the head in response to a received servo control signal. A sensor, located in the head, senses se... | 05/30/2006 |
| 7054693 | High data rate actuator/sensor control system for a plastics processing machine A control system for a plastics processing machine with at least one central processing unit with a real-time operating system is described. The central processing unit is connected to a plurality of actuators and/or sensors via a bus system, with at least one actua... | 05/30/2006 |
| 7050862 | Servo controlling device and method When a position/speed feedback changes while a control system for driving a feed axis uses an integration gain during a shaft stopping, the control system goes unstable to cause a torque instruction to vibrate or diverge. In addition, only a single, narrow-range fee... | 05/23/2006 |
| 7050257 | Method for estimating the resistance of a DC motor for positioning read/write heads of a hard disk A method for estimating resistance of a DC motor for positioning read/write heads of a data storage disk is provided. The DC motor is controlled in an open-loop voltage mode through a motor controller input with a first signal for compensating positioning of the rea... | 05/23/2006 |
| 7047107 | Robot control apparatus There are provided a parameter storage part for storing monitor point information, a locus generation part for generating motions of the support, each joint point, and the like based on the movement command, a control point speed control part for obtaining speed of ... | 05/16/2006 |
| 7042668 | Method and apparatus for generating an index location from a spin motor of a disk drive A method and apparatus for generating an index location from a spin motor of a disk drive are disclosed. A disk drive includes a motor having a plurality of commutation states, wherein changes in commutation states are controlled by an FCOM signal having FCOM pulses... | 05/09/2006 |
| 7042188 | Servo motor with a built-in drive circuit A servo motor with a built-in drive circuit is provided in which, when power is off, positional data including multiple-rotation counting values is stored in a nonvolatile memory to thereby eliminate battery back-up, and in which the CPU of a drive control circuit p... | 05/09/2006 |
| 7038417 | Current control loop bias calibration by integration Ascertaining through integration a bias calibration level for a current control loop of a driver motor of a tape drive. The driver motor includes a current controller having as inputs a demand signal, a bias signal, and a feedback signal. The current controller incl... | 05/02/2006 |
| 7038416 | Control system for a floor maintenance appliance A control system for controlling the work output delivered to a floor surface by a work tool associated with a floor maintenance machine, such as a burnisher, is provided. In one embodiment, a voltage regulator regulates the voltage provided to the motor assembly th... | 05/02/2006 |
| 7038421 | Method and system for multiple servo motor control A system for control of a plurality of motors comprising: an inverter including at least three legs, with each leg including two series switching devices configured to receive a command from a controller. The system also includes a first motor operably connected to ... | 05/02/2006 |
| 7038156 | Rotary knob assembly for home appliance Disclosed is a rotary knob assembly for a home appliance. The assembly includes a rotary switch having an encoder and a shaft rotatably installed at the encoder, a knob coupled to the shaft of the rotary switch, and a support member provided around the rotary switch... | 05/02/2006 |
| 7038422 | Electrical actuator system and vehicle air conditioner using the same In a vehicle air conditioner with an electrical actuator system, a transmission mechanism transmits a rotation force of an electrical motor to an air mixing door when first and second pulse signals are generated from first and second brushes in a door operation regi... | 05/02/2006 |
| 7038667 | Mechanisms for control knobs and other interface devices Mechanisms for a control knob or other interface device providing additional degrees of freedom for the knob. One embodiment provides a rotatable knob moveable also in a lateral plane approximately perpendicular to the axis of rotation. A mechanism providing the lat... | 05/02/2006 |
| 7039494 | Controller for machine A controller that eliminates an error caused by acceleration/deceleration control, and controls the velocity of drive axes which is not represented by a rectangular coordinate system such that maximum allowable values of velocity, acceleration, and jerk of the drive... | 05/02/2006 |
| 7034899 | Radio command device A control unit (10) superimposes command signals on AC power passing on a power line or network (40). A command unit (20) controls and powers an electrical load (50) such as a motor M. A command processor (26) receives radio freque... | 04/25/2006 |
| 7035032 | Method and system for reducing power consumption in a rotatable media data storage device Methods and systems in accordance with embodiments of the present invention can provide for reduced power consumption in rotatable media data storage devices. A voice coil motor driver configured to operate as a linear driver can be operated in a quasi-switch mode, ... | 04/25/2006 |
| 7035037 | Disc drive with compensation for non-repeatable runout An NRRO compensation circuit controls a head position in a disc drive. The circuit has a first frequency circuit providing a first output corresponding to NRRO and a first characteristic sensing circuit that senses the first output and that generates a first control... | 04/25/2006 |
| 7034491 | Numerical controller For outputting an amount of backlash compensation according to the direction of reversal in the reversal motion of the moving axis, three output modes are prepared: (a) a mode in which a preset backlash compensation is outputted all at once, (b) a mode in which back... | 04/25/2006 |
| 7035042 | Fast positioning of disk drives and other physical systems A method useful to change a system's output from one value to another within a prescribed time-interval in an optimal manner using optimization criteria such as minimal time (e.g., to increase throughput) or minimal energy (e.g., to reduce heat dissipation and reduc... | 04/25/2006 |
| 7034490 | Motor positioning servo loop using oversampling bitstream DAC A Hard Disk Drive VCM positioning servo loop comprises an oversampling bitstream Digital to Analog converter. The oversampling DAC is a sigma-delta converter which yields higher resolution and lower noise than Nyquist-rate DACs. This allows driving the VCM with fine... | 04/25/2006 |
| 7034413 | Holdup time extender and inrush current eliminator for switching power supplies The present invention is a method and system for supplementing power when a power supply has a power failure. An amount of inrush current produced upon resumption of input power is reduced. Supplemental power circuitry may include a rechargeable battery that may sup... | 04/25/2006 |
| 7034492 | Methods and systems for reducing unintentional collisions A method for differentiating if a feedback signal is a result of an unintentional collisions in a servo system includes injecting a feed forward term in the servo system. ... | 04/25/2006 |
| 7030585 | Controller A controller capable of preventing response delay and generation of vibrations attributable thereto during position control of a movable part of a machine having low rigidity. A motor for driving a machine having low rigidity is subjected to position and velocity lo... | 04/18/2006 |
| 7030586 | Method for co-ordinating and synchronizing the movement of servo-assisted axes The invention regards a method for co-ordinating and synchronizing the movement of servo-assisted axes in machines and apparatuses which execute various industrial applications. The method in object is applied in the programming of electronic control systems using s... | 04/18/2006 |
| 7030588 | Control constant adjusting apparatus A control constant adjusting apparatus in a control apparatus of a robot or a machine tool, etc. is disclosed. This control constant adjusting apparatus includes a speed control part (12), an estimation part (13), an identification part (14) and... | 04/18/2006 |
| 7026779 | Motor control apparatus for controlling operation of mover of motor A motor control apparatus of the present invention comprises a velocity detector for detecting a rotation velocity of a mover of a motor, a position detector for detecting a position of the mover, a differentiator for performing time differentiation with respect to ... | 04/11/2006 |
| 7023162 | Automatic gate operator A barrier movement operator is having a position sensor in a telescoping barrier control arm is described. A controller, remote from the arm, senses the barrier position to identify limits of barrier travel and to control rate of travel of the barrier between limits... | 04/04/2006 |
