Motorantriebsregelung mit Rücksetzung des Zeitgebers für das Überstromzeitinterval

摘要

A microcomputer (8) produces to a drive circuit (9) drive command signals for starting to drive and braking a motor (3) so that the position of a throttle valve (2) is controlled to a target position. A current supplied to the motor (3) is limited not to exceed a first current limitation value at the time of motor drive start and braking. When the current limitation continues for a predetermined time period (t32), the current is further limited not to exceed a second current limitation value. The microcomputer (8, 108 - 110) detects switching of motor current supply direction. When the current supply direction is switched, a reset command signal (SR) is produced to reset a timer operation for a current limitation continuation determination.