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Class Information
Number: 318/650
Name: Electricity: motive power systems > Positional servo systems (e.g., servomechanisms) > With particular "error-detecting" means > With current, voltage or electrical power measuring instruments
Description: Subject matter in which the error detecting means is a current, voltage or electrical power measuring instrument.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7652446 |
Method for detecting and controlling output characteristics of a DC motor and a self-propelled apparatus using the same |
Jan. 26, 2010 |
| 7439700 |
Control system |
Oct. 21, 2008 |
| 7427846 |
Method of optimizing servo controller power in two-dimensional flexure mems storage devices |
Sep. 23, 2008 |
| 7423393 |
Car control method and car control apparatus |
Sep. 9, 2008 |
| 7421359 |
Detecting back electromotive force voltage |
Sep. 2, 2008 |
| 7265511 |
Motor control device |
Sep. 4, 2007 |
| 7253581 |
Data storage device, motor control device, and motor control method |
Aug. 7, 2007 |
| 7170253 |
Automotive door latch control by motor current monitoring |
Jan. 30, 2007 |
| 7145309 |
Open loop motor parking method and system |
Dec. 5, 2006 |
| 7138782 |
Motor control system and method of the same |
Nov. 21, 2006 |
| 7109680 |
Inverter device |
Sep. 19, 2006 |
| 7106012 |
Electronic control unit, electric power-assisted steering device and transmission ratio-variable steering unit |
Sep. 12, 2006 |
| 7102318 |
Servo motor with a built-in drive circuit |
Sep. 5, 2006 |
| 7053583 |
Brushless DC motor control |
May. 30, 2006 |
| 7042188 |
Servo motor with a built-in drive circuit |
May. 9, 2006 |
| 7016775 |
Controller and control method for an electric power steering apparatus |
Mar. 21, 2006 |
| 6998812 |
Method for determining the mass moment of inertia of an electric motor drive system |
Feb. 14, 2006 |
| 6984955 |
Motor control device |
Jan. 10, 2006 |
| 6972540 |
Disk drive employing wedge spindle speed control with eccentricity compensation |
Dec. 6, 2005 |
| 6967454 |
Monitoring apparatus and method for monitoring a pole circuit of an electrical power converter |
Nov. 22, 2005 |
| 6806663 |
Motor driving circuit |
Oct. 19, 2004 |
| 6777905 |
Voltage regulator for controlling output of automotive alternator |
Aug. 17, 2004 |
| 6768281 |
Verification of operational capability of a tape drive |
Jul. 27, 2004 |
| 6756753 |
Sensorless control system and method for a permanent magnet rotating machine |
Jun. 29, 2004 |
| 6747425 |
System for sharing power and signal pins on a motor controller |
Jun. 8, 2004 |
| 6448732 |
Dual mode portable suction cleaner |
Sep. 10, 2002 |
| 6377015 |
Voice coil motor control apparatus for use in disk drives |
Apr. 23, 2002 |
| 6362588 |
Excitation system for rotating synchronous machines |
Mar. 26, 2002 |
| 6300736 |
Low pin count DC-motor integrated drive circuit |
Oct. 9, 2001 |
| 6266580 |
Control apparatus and method of control system having dead time |
Jul. 24, 2001 |
| 6242875 |
Motor driving apparatus |
Jun. 5, 2001 |
| 6226073 |
Stage system with driving mechanism, and exposure apparatus having the same |
May. 1, 2001 |
| 6175207 |
Power up communication interface system |
Jan. 16, 2001 |
| 6137418 |
Single channel apparatus for on-line monitoring of three-phase AC motor stator electrical faults |
Oct. 24, 2000 |
| 6114820 |
Power window apparatus having safety unit |
Sep. 5, 2000 |
| 6034499 |
Method of controlling rotary position of a torque motor |
Mar. 7, 2000 |
| 6011370 |
Servo-motor driving method |
Jan. 4, 2000 |
| 5982133 |
Brushless motor with rotor position detection compensation caused by induced voltage in rotor |
Nov. 9, 1999 |
| 5847535 |
Active electronic damping for step motor |
Dec. 8, 1998 |
| 5787717 |
Suction inlet/discharge outlet opening and closing apparatus for an air conditioner and method therefor |
Aug. 4, 1998 |
| 5723966 |
System and method for increasing the efficiency of alternating current induction motors |
Mar. 3, 1998 |
| 5684662 |
Driving apparatus for stabilizing operation of an extensible-retractable power antenna |
Nov. 4, 1997 |
| 5635809 |
Actuating-element positioning servo-drive device |
Jun. 3, 1997 |
| 5532566 |
Voltage mode drive of servo system |
Jul. 2, 1996 |
| 5481170 |
Method and apparatus for controlling shift force in an automated mechanical transmission |
Jan. 2, 1996 |
| 5471124 |
Method for determining the position in a cassette recorder |
Nov. 28, 1995 |
| 5418439 |
Apparatus and method for discriminating position information in a position control system |
May. 23, 1995 |
| 5416885 |
Speed control device for DC motor |
May. 16, 1995 |
| 5414336 |
Servo control apparatus with back-up power supply |
May. 9, 1995 |
| 5398194 |
Electronic sensing circuit using piezoresistors |
Mar. 14, 1995 |
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