| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress the wasteful consumption of regenerative electric power in a crane including motors as mechanical power sources. <P>SOLUTION: A crane includes a winding unit 3, a hoist 4, a slewing unit 5 and a hydraulic unit 20. The hydraulic unit 20 includes a motor for the hydraulic unit 21 and a pump for the winding unit 22, and drives the winding unit 3. The hoist 4 is driven by a motor for the hoist 25, and the slewing unit 5 is driven by a motor for the slewing unit 24. The regenerative electric power of the motor for the hoist 25 and the motor for the slewing unit 24 is supplied to a motor for the hydraulic unit 21. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
