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Class Information
Number: 318/601
Name: Electricity: motive power systems > Positional servo systems (e.g., servomechanisms) > Digital or numerical systems > Digital comparison
Description: Subject matter in which the system error signal is obtained by comparison of the digital command signal with a position feedback signal
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7291999 |
System and method for diagnosing a controller in a limited rotation motor system |
Nov. 6, 2007 |
| 7282883 |
Pivoting and barrier locking operator system |
Oct. 16, 2007 |
| 7262959 |
Drawer-type storage-unit housing apparatus |
Aug. 28, 2007 |
| 7183731 |
Pulse generating method and pulse generator, and motor control system using the same |
Feb. 27, 2007 |
| 7180257 |
Method of brake pulse rejection in commutation pulse detection circuits |
Feb. 20, 2007 |
| 7170251 |
System and method for diagnosing a controller in a limited rotation motor system |
Jan. 30, 2007 |
| 7164244 |
Apparatus for controlling electric motors and related control method |
Jan. 16, 2007 |
| 7148647 |
Numerical control device |
Dec. 12, 2006 |
| 7135831 |
Method and device for controlling motor |
Nov. 14, 2006 |
| 7103448 |
Robot system |
Sep. 5, 2006 |
| 7062159 |
Device for correcting a digital estimate of an electric signal |
Jun. 13, 2006 |
| 7057364 |
Actuation system comprising a digital position sensor |
Jun. 6, 2006 |
| 7049778 |
Inverter control apparatus and inverter control method |
May. 23, 2006 |
| 7012397 |
Encoder and control apparatus for motor |
Mar. 14, 2006 |
| 6998810 |
Position controller of feed shaft |
Feb. 14, 2006 |
| 6995538 |
Rotational direction detecting apparatus for a three-phase brushless DC motor |
Feb. 7, 2006 |
| 6967459 |
Method for controlling or regulating the current in a direct current machine for a fan |
Nov. 22, 2005 |
| 6949900 |
MCU control for brushless DC motor |
Sep. 27, 2005 |
| 6912427 |
Programmable limit switch with distributed intelligence |
Jun. 28, 2005 |
| 6894453 |
Method and apparatus to measure disk drive head load/unload velocity |
May. 17, 2005 |
| 6876891 |
Method and apparatus for providing tactile responsiveness in an interface device |
Apr. 5, 2005 |
| 6822414 |
Motor controller |
Nov. 23, 2004 |
| 6707269 |
Motor control circuit with adaptive dynamic range selection |
Mar. 16, 2004 |
| 6445961 |
Control system and method |
Sep. 3, 2002 |
| 6445966 |
Data interface module for motor control system |
Sep. 3, 2002 |
| 6429618 |
Index signal generator |
Aug. 6, 2002 |
| 6333613 |
Servo system control device and control method |
Dec. 25, 2001 |
| 6323614 |
System and method for controlling suspension using a magnetic field |
Nov. 27, 2001 |
| 6294910 |
Digital position sensor for sensing position of a moving target |
Sep. 25, 2001 |
| 6218800 |
Control system, driving system and control method, apparatus including the driving system |
Apr. 17, 2001 |
| 6201361 |
High-speed postage meter base |
Mar. 13, 2001 |
| 6195592 |
Method and apparatus for providing tactile sensations using an interface device |
Feb. 27, 2001 |
| 6124696 |
Programmable stepper motor controller and method therefor |
Sep. 26, 2000 |
| 6118244 |
Circuit arrangement for powering an electric motor |
Sep. 12, 2000 |
| 6107764 |
Drive control for a switched reluctance motor |
Aug. 22, 2000 |
| 6107763 |
Closed loop and open synchronization of the phase switchings in driving a DC motor |
Aug. 22, 2000 |
| 6084375 |
Method and apparatus for control of drive systems for cycle based processes |
Jul. 4, 2000 |
| 6066929 |
Frequency generator circuit for a brushless DC motor control system |
May. 23, 2000 |
| 6020708 |
Positioning apparatus |
Feb. 1, 2000 |
| 6011376 |
Method and apparatus for injection molding machine control |
Jan. 4, 2000 |
| 5992383 |
Control unit having a disturbance predictor, a system controlled by such a control unit, an electrical actuator controlled by such a control unit, and throttle device provided with such an act |
Nov. 30, 1999 |
| 5977735 |
Tracking detection system of electrical servomotors |
Nov. 2, 1999 |
| 5952807 |
Tracing control method and apparatus |
Sep. 14, 1999 |
| 5932986 |
Precise control of the rotational velocity of brushless alternating current electric servo motors |
Aug. 3, 1999 |
| 5903941 |
Air control system for an air bed |
May. 18, 1999 |
| 5905350 |
Position measuring system and measuring process |
May. 18, 1999 |
| 5889672 |
Tactiley responsive user interface device and method therefor |
Mar. 30, 1999 |
| 5883482 |
Method and apparatus for controlling a drive in a machine tool |
Mar. 16, 1999 |
| 5877603 |
Electric current control method for a servomotor |
Mar. 2, 1999 |
| 5877605 |
Servo device having plural servo systems |
Mar. 2, 1999 |
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