ELECTRIC TURNING CONTROL APPARATUS AND CONTROL METHOD FOR ELECTRIC MOTOR FOR TURNING

摘要

An electric turning control unit (40) includes a turning electric motor (21) configured to drive a turning mechanism (2) configured to cause an upper-part turning body (3) to turn relative to a lower-part traveling body (1) and a control unit (60) configured to control driving of the turning electric motor (21). The control unit (60) is configured to cause the output of the turning electric motor (21) to continue after the turning speed of the upper-part turning body (3) becomes zero, based on the magnitude of the output or the direction of the output of the turning electric motor (21) at the time when the upper-part turning body (3) is decelerated and its turning speed becomes zero.