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
Systems and methods for a signed magnitude adder in one's complement logic
Biaxially oriented hydrolysis-stable polyester film comprising epoxidized fatty acid derivatives and a chain extender, and process for production thereof and use thereof
Sub-resolution assist feature repair
Multi-layer, microporous polyolefin membrane, its production method, battery separator and battery
Systems and methods for reducing narrow bandwidth interference contained in broad bandwidth signals
Lithographic apparatus and device manufacturing method
Adaptive frame scanning scheme for pulsed X-ray imaging
  Randomly Featured Patents
Wireless method for monitoring and controlling food temperature
Fluorescent lamp and method of manufacturing same
Ferroelectric memory devices which utilize boosted plate line voltages to improve reading reliability and methods of operating same
Instrumentation for injection of therapeutic fluid into joints
Method for making elastic gloves
Multi-view video format
Method for insulating leads of thermal fuse with insulating tubes and thermal fuse therefor
Current protection circuit using multiple sequenced bipolar transistors
Footwear assembly having two detachable elements
Process for the production of composite components by powder injection molding, and composite powders suitable for this purpose