Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 8076892 | Stator position adjustment method, motor drive device and stator position adjustment system A stator position adjustment method for a motor drive device that includes a motor case, a rotor shaft supported by the motor case in order to rotate a rotor inside the motor case, and a stator disposed at an outer circumference of the rotor concentrically with the ... | 12/13/2011 |
| 8054029 | Calibration method for servo A calibration method for servo is provided, wherein a motor of the servo is activated at a low-speed mode to drive a moved member of the servo moving to a first limit position and a second limit positions. During the movement of the moved member, a motor control pow... | 11/08/2011 |
| 8040099 | Position device in gantry type of construction In a positioning device in gantry type of construction, due to a special arrangement of the position-measuring devices used for the positioning, errors due to thermal expansion of the positioning device may be avoided to a great extent. In particular, attention is g... | 10/18/2011 |
| 8004230 | Device for controlling a rotary press A device for controlling a rotary press is provided. The device includes a main evaluation unit which is provided with a main signal inlet, at least a first main signal outlet and a first main transformation device. The device further includes a master generator whi... | 08/23/2011 |
| 7994749 | Multiple-rotation absolute-value encoder of geared motor A multiple-rotation absolute-value encoder of a geared motor, wherein the geared motor (10) reduces the rotational speed of a motor shaft (12) and takes it out from a gear shaft (14) to drive a machine device (15) in an operating range co... | 08/09/2011 |
| 7816882 | Method of protecting an electronic device driven by DC motor and circuit for detecting positioning signals thereof A method for protecting an electronic apparatus driven by a DC motor and a detection circuit for detecting positioning signals thereof. The electronic device includes an optical encoder, a code strip, and a DC motor. While moves along the code strip, the optical enc... | 10/19/2010 |
| 7777441 | Motor controlling method, motor controlling device, original reading apparatus, and storage medium having program stored thereon A motor controlling method according to the present invention involves causing rotation of a motor to commence by applying an initial power that can cause movement of an object to be transported to commence, to the motor; obtaining a position of the object to be tra... | 08/17/2010 |
| 7764033 | Motor driving apparatus A controller for a motor driving apparatus switches a direction of electricity flowing through a first coil according to a first lead angle signal obtained based on a first magnetic pole detecting signal and a second magnetic pole detecting signal. The controller sw... | 07/27/2010 |
| 7667424 | Servo device A servo device is provided which includes a drive source made of a brushless motor. A DC motor driving integrated circuit produces output signals and controls the output of a three-phase brushless motor driving integrated circuit to drive the brush less motor. A sel... | 02/23/2010 |
| 7504795 | Head position control method, head position control device, and disk device In a positioning control device based on control of an observer having a disturbance suppression function, a disturbance suppression function according to a head position is added without impairing the control characteristics of the observer. The position control de... | 03/17/2009 |
| 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 |
| 7423393 | Car control method and car control apparatus A car control apparatus including a wheel sensor, wheel torque calculating means for calculating wheel torque from the wheel speed, drive force detecting means for detecting drive force generated by an electric motor, car body drive force calculating means for calcu... | 09/09/2008 |
| 7420348 | Drive apparatus Optical disc drives designed for reduced power consumption switch the supply voltage in three stages between first, second, and third power supplies. The reduction in power consumption that is possible in the focusing and tracking drive circuits with three stage swi... | 09/02/2008 |
| 7397212 | DC motor phase estimation with phase-locked loop A DC motor phase estimation algorithm that estimates a speed-related harmonic frequency of a DC motor current under dynamic load conditions having known geometry parameters. The algorithm estimates the phase and magnitude of a complex coefficient in a complex single... | 07/08/2008 |
| 7394219 | Encoder unit and process of assembling same An encoder unit releasably secured to the flange end of a motor with a form-fitting and positive connection comprises an encoder housing with guide grooves for receiving a printed circuit board (PCB), a recess for receiving the motor shaft, and at least one moveable... | 07/01/2008 |
| 7375487 | Geared motor A motor encoder is mounted on a motor shaft of a geared motor 1, and the origin position is detected by using a Z-phase signal. An absolute value encoder with a precision that allows the number of motor rotations to be determined is mounted on an output shaft... | 05/20/2008 |
| 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 |
| 7354170 | Vehicular mirror having tilt angle detection rod with swing axis In a vehicular mirror device, one end part of an operating shaft disposed on a side opposite to a drive shaft relative to a fulcrum of a mirror holder is swivelably coupled to the mirror holder, and a detection rod of a sensor is coupled to the operating shaft, whic... | 04/08/2008 |
| 7355365 | Functional unit of a motor vehicle A functional unit of a motor vehicle tat has at least one adjustable functional element, a control means for controlling and/or for monitoring the position of the functional element, an angle sensor coupled to the functional element for determining the position ther... | 04/08/2008 |
| 7356402 | Controller for engine having component A required-generate-current (RGC) is calculated according to conditions of the electric loads and a charging state of the battery. The required-alternator-drive-torque (RADT) is estimated according to the required-generate-current (RGC). A required engine torque is ... | 04/08/2008 |
| 7334906 | Outer mirror tilting apparatus An outer-mirror tilting apparatus includes a holder base that fixes a main body of an outer mirror, a housing that is fitted to a bearing unit of the holder base, the housing having a pivot shaft supporting the holder base in a tiltable manner, a rod driving mechani... | 02/26/2008 |
| 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 |
| 7299708 | Rotor angle estimation for permanent magnet synchronous motor drive A method of determining a rotor angle in a drive control for a motor, comprising the steps of (a) determining a rotor magnetic flux in the motor; (b) estimating the rotor angle on the basis of the rotor magnetic flux; and (c) correcting the estimated rotor angle on ... | 11/27/2007 |
| 7268511 | Control for servo motors A drive arrangement for positioning a positioning element is disclosed that includes an electric servo motor for driving the positioning element, a potentiometer for presetting a setpoint, an actual value sensor disposed at the servo motor, and a motor driver with a... | 09/11/2007 |
| 7253582 | Disk drive estimating angular position of spindle motor during spin-up by computing differences in winding current rise times A disk drive is disclosed comprising a spindle motor having a plurality of windings including at least a first winding, a second winding, and a third winding. During a spin-up operation, a voltage is applied to the first winding and a first rise time is measured for... | 08/07/2007 |
| 7245100 | Multi-axis AC servo control system and method A multiple axis servo control implements a multi-tasking PWM control unit to provide PWM signals for multiple axes in a single unit. A time slice mechanism provides axis selection signals based on a system clock signal to permit control parameters of the selected ax... | 07/17/2007 |
| 7230400 | Electronically commutated motor In an electronically commutated motor (M), rotor position signals are generated by means of a galvanomagnetic rotor position sensor (40). A timer (CNT_HL) brings about an advanced commutation which occurs only once the motor has reached a specific rotation sp... | 06/12/2007 |
| 7227329 | Wire-saving optical encoder having servomotor identification information A wire-saving optical encoder having servomotor identification information is applied to a wire-saving transmission design to provide a circuit and a method for processing servomotor identification information and encoded feedback control signals. With a microproces... | 06/05/2007 |
| 7221116 | Motor control apparatus In an automatic transmission position control by a motor, it is determined whether the present instant belongs to a starting period, that is, the present instant is immediately after resetting of a control unit or application of power to it. If it is the starting pe... | 05/22/2007 |
| 7221114 | Conveyance control apparatus and image forming apparatus A conveyance control apparatus controls an amount of movement of a carrier. A first encoder detects an amount of movement of the carrier and outputting a first signal. A second encoder detects an amount of movement of a drive member driving the carrier. A control pa... | 05/22/2007 |
| 7216994 | Vehicle exterior rearview mirror assembly A mirror system for a vehicle comprising an exterior rearview mirror assembly, which includes a fixed portion which is configured to mount to a side of the vehicle. The movable portion includes a reflective element and a reflective element actuator. The reflective e... | 05/15/2007 |
| 7205761 | Rotation state detecting device and rotation state detecting method A rotation state detecting device capable of detecting the direction of rotation of a rotating body includes first and second bridge circuits made up of magneto-resistance effect elements, a first comparator for detecting the increasing/decreasing direction of the c... | 04/17/2007 |
| 7199539 | Motor soft start controller A motor soft start controller, which is composed of a rectifying and voltage-stabilizing circuit, a microprocessor, a motor switch electrically connected with a motor, a reset button, a signal amplifying circuit electrically connected with a touch piece, a motor dri... | 04/03/2007 |
| 7196859 | Processing techniques for time-based servo patterns Techniques are described for accurately processing playback signals of time-based servo patterns recorded on a data storage medium. In particular, techniques are described for determining values for signal peaks within a playback signal of a time-based servo pattern... | 03/27/2007 |
| 7196513 | Method for testing magnetic hard disk or magnetic head A testing method for a magnetic hard disk or a magnetic head in a test system includes a moving step in which the magnetic head, which moves to fly closely over the magnetic disk, moves to a predetermined radial position corresponding to the position data of the mag... | 03/27/2007 |
| 7196489 | Rotary shaft control apparatus The invention aims to suppress or prevent the vibration that can occur due to the intervention of a low-rigidity part between detector and rotating body. An angular acceleration sensor for detecting the rotational angular acceleration of a rotating body is provided,... | 03/27/2007 |
| 7191535 | On-machine automatic inspection of workpiece features using a lathe rotary table To enable the on-machine measurement of selected features of a workpiece formed on a live spindle lathe with a positioning rotary table, both the machine itself and the electronic touch probe used to conduct the measurements are calibrated. The accuracy of the machi... | 03/20/2007 |
| 7193343 | Electric motor A stator having a stator core about which a coil is wound is secured to an aluminum frame. A magnet-embedded type rotor is rotatably accommodated inward of the stator. A circuit substrate is attached to the surface of the aluminum frame opposite to the surface to wh... | 03/20/2007 |
| 7190138 | Failure monitor for motor drive control system A failure monitor designed to monitor a failure in operation of a motor drive control system. The system works to drive a motor-driven member through an output shaft and an electric motor and includes an output shaft angular position sensor for determining an angula... | 03/13/2007 |
| 7180257 | Method of brake pulse rejection in commutation pulse detection circuits A system and method is provided for improved monitoring and controlling of mechanically commutated DC motors. The system and method include DC motors, pulse-count driver circuitry for driving the motors, motor position sensing circuitry, and motor control circuitry.... | 02/20/2007 |
