| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To make an electric motor run in a range beyond a rated capacity when an actuator of a working machine system having a short continuous operating time is operated by using the electric motor MG with a small capacity, and to make the electric motor run at the rated capacity or smaller during travel for a long continuous operating time. <P>SOLUTION: A controller C determines whether the construction machine is in a traveling mode or a traveling stop operation mode on the basis of signals from mode sensors 5a and 12a. When it is determined that the construction machine is in the traveling stop operation mode, the controller C makes high-output setting for causing the electric motor MG to run in the range beyond the rated capacity. Additionally, when the construction machine is in a normal traveling mode, the controller C makes low-output setting so that the electric motor can run at the rated capacity or smaller. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
