Resources Contact Us Home
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
Terminal box assembly
Vehicle inertial sensor systems
Switched capacitor amplifier
Semiconductor device having a first conductive member connecting a chip to a wiring board pad and a second conductive member connecting the wiring board pad to a land on an insulator covering
Distylium plant named `PIIDIST-II`
Antenna array system
  Randomly Featured Patents
Silicon carbide field-effect transistor with improved breakdown voltage and low leakage current
Docking station
Wide-angle lens system
Segregated waste disposal system
Colored and reflective sidewall for tires
Continuously operating panel press
Goal-driven information interpretation and extraction system
Portable sink apparatus and methods of manufacture and use thereof
Modular box shield for forming a coaxial header
Liquid dispenser