| 摘要 |
A control device 50 of an electric rotary excavator generates a rotation speed coefficient in accordance with a setting condition of a fuel dial 13 and a selection condition of a mode selection switch 14 and changes a value of a target speed command value based on the rotation speed coefficient to change a rotation speed of a rotary body 4. Accordingly, when the engine speed becomes low through operation of the fuel dial 13 or the mode selection switch 14, the rotation speed of the rotary body 4 can be decreased accordingly, while when the engine speed becomes high, the rotation speed can be increased accordingly. Therefore, the operation feeling substantially similar to a conventional arrangement for hydraulically rotating the rotary body 4 can be obtained, so that the operator is not confused when the operator shifts excavators from the conventional hydraulic excavator to the electric rotary excavator.
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