DRIVE SYSTEM FOR ELECTRIC CONSTRUCTION MACHINE
In an electrically driven construction machine, decrease in the remaining electric power storage amount of an electric power storage device is reduced when a transition to auto idle control takes place in case where the remaining electric power storage amount is small, and the duration over which th...
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| Format: | Patent |
| Sprache: | eng ; fre ; ger |
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| Zusammenfassung: | In an electrically driven construction machine, decrease in the remaining electric power storage amount of an electric power storage device is reduced when a transition to auto idle control takes place in case where the remaining electric power storage amount is small, and the duration over which the remaining electric power storage amount of the electric power storage device lasts is lengthened. Accordingly, a controller 31 controls the rotation speed of an electric motor 1 such that the rotation speed of the electric motor 1 is lowered from a predetermined rotation speed to an idle rotation speed Ni when none of a plurality of operation devices 20, 21, 22, 23a, 23b, and 24 is manipulated and a predetermined time duration TD has elapsed. In addition, when the remaining electric power storage amount of an electric power storage device 33 is equal to or smaller than a first threshold Ea, the controller 31 sets the predetermined time duration TD shorter than when the remaining electric power storage amount is greater than the first threshold Ea. |
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