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 targeting hydrophobic drugs to vascular lesions
Brushless motor drive apparatus and drive method
Preparation of isomerically pure substituted cyclohexanols
Reception circuit and signal reception method
Selection of system parameters based on non-acoustic sensor information
Method of forming a semiconductor package
Mobile communication device monitoring systems and methods
  Randomly Featured Patents
Chalk line device, hook therefor, and method
Electrophotographic photoreceptor and image forming method
Method for the treatment of withdrawal symptoms associated with smoking cessation and preparations for use in said method
Wrapping mechanism for round balers
Cable reel
Object-oriented time series generator
Adaptive path selection for interference cancellation
Lens device
Printed circuit boards and method for manufacturing printed circuit boards
Method of manufacturing a tube assembly for electric lamps