Patents Assigned to Duplo Seizo Kabushiki Kaisa
  • Patent number: 4864211
    Abstract: A motor drive control that permits a DC electric motor to be rapidly driven and accurately stopped at predetermined stop positions is disclosed. An indexer (V) generates a deceleration point signal at a deceleration point that occurs before a predetermined stop point of load (VI) and a stop point signal at the stop point corresponding to a predetermined destination of the load (VI). A rotational direction detector (III) detects the rotational direction of the motor (IV) as the motor (IV) passes the stop point and produces a rotational direction signal representing the rotational direction of the motor (IV). A rotation control circuit (I) generates a drive signal in response to movement and movement direction signals; a deceleration direction signal in response to the deceleration point signal; an inhibit signal in response to the stop point signal; and a decelerated drive signal representing a reverse rotational direction of the motor (IV).
    Type: Grant
    Filed: May 5, 1988
    Date of Patent: September 5, 1989
    Assignee: Duplo Seizo Kabushiki Kaisa
    Inventor: Hiroyuki Kawaguchi