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, system and computer program product for managing funds in custodial deposit accounts
Method, device, and system for configuring component carrier in carrier aggregation scenario
Subcarrier cluster-based power control in wireless communications
Battery pouch sheet edge insulation
Method and apparatus for triggering expiration of a data tag device
Method for treating rheumatoid arthritis by administering an anti-IL-6 antibody and methotrexate
  Randomly Featured Patents
Paper feeding device for facsimile apparatus
Belt construction having a mock leno fabric as an impact breaker or splice insert
Exercise device
Solvent extraction
Disk clamping device
Reinforced glove
Vehicular seat belt covering
Storage medium for storing text-based subtitle data including style information, and reproducing apparatus and method for reproducing text-based subtitle data including style information
Storage phosphor layer and system and method for erasing same
Substrate treatment to reduce pattern roughness