Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Motor control device










Image Number 18 for United States Patent #5872439.

A motor control device for controlling a swing motor which moves a head is provided with a disturbance observer and an operation suspending unit. The disturbance observer outputs a compensating signal for compensating a driving voltage V for driving the swing motor. The operation suspending unit suspends an operation of the disturbance observer, based on a detection signal supplied by a velocity sensor which detects an angular velocity of the swing motor and the driving voltage signal V for driving the swing motor. The operation suspending unit operates when the signal voltage in the disturbance observer exceeds a reference level. This arrangement solves the following problem arising when the disturbance observer is employed for controlling a motor: when the motor comes into collisions with a stopper at an edge of the motion space, the disturbance observer further drives the motor so as to oppose a motion caused by the collisions, thereby exacerbating the collision.








 
 
  Recently Added Patents
Method of optimizing air mover performance characteristics to minimize temperature variations in a computing system enclosure
Intake parameter-calculating device for internal combustion engine and method of calculating intake parameter
Method and apparatus for controlling peak amplifier and doherty power amplifier
Chip on chip semiconductor device including an underfill layer having a resin containing an amine-based curing agent
Apparatus and method for image encoding/decoding using predictability of intra-prediction mode
Apparatus, electronic component and method for generating reference voltage
Multi-layer, microporous polyolefin membrane, its production method, battery separator and battery
  Randomly Featured Patents
Elevator system having car panel with adjustable views based on floor data, and methods of operating the same
Image processing apparatus, control method therefor, and program
Integrally-encased diving control valve means
Method of making drape-shaped glass element by sagging between column supports
Catalyst element for purifying exhaust gases from internal combustion engine
Method of making silicides by heating in oxygen to remove contamination
Chair
Hardened glass or glass-ceramic cooking vessel formed as a wok, and method of making same
Detection of erythropoietin and erythropoietin receptor
Gallium nitride based semiconductor light-emitting device and method for fabricating the same, gallium nitride based light-emitting diode, epitaxial wafer, and method for fabricating gallium n