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
Method and apparatus for triggering expiration of a data tag device
Vacuum switch and electrode assembly therefor
Method of manufacturing toner
Base station, relay station, and bandwidth allocation method
Illumination unit for a direct-view display
Non-serialized electronic product registration system and method of operating same
String changing tool with a quick connector assembly and worm gear string cutter
  Randomly Featured Patents
Gripper seat
Lighted handgrip assembly
Reinforcement for anchoring a prosthesis stem
Matrix of fishing lure receptacles
Preparation of transition metal salt compositions of organic carboxylic acids
Scanning light exposure apparatus
Internally separable tape laminate
Method for creating an error correction coding scheme
Flip top can opener