Rotation Control Device, Rotation Control Method and Construction Machine
First Claim
1. A rotation control device for controlling a rotary body that is rotated by an electric motor, comprising:
- a target speed command generating means that is adapted to change a target speed command value of the rotary body in accordance with at least one of the following factors;
a setting condition of a fuel supply setting means for setting a fuel supply to an engine that is used in conjunction with the electric motor;
an operation amount of a work machine lever for operating a work machine that is driven by the engine; and
a selection condition of a work mode selecting means for selecting a work mode of a work performed using the work machine to set the fuel supply to the engine.
1 Assignment
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Accused Products
Abstract
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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Citations
3 Claims
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1. A rotation control device for controlling a rotary body that is rotated by an electric motor, comprising:
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a target speed command generating means that is adapted to change a target speed command value of the rotary body in accordance with at least one of the following factors;
a setting condition of a fuel supply setting means for setting a fuel supply to an engine that is used in conjunction with the electric motor;
an operation amount of a work machine lever for operating a work machine that is driven by the engine; and
a selection condition of a work mode selecting means for selecting a work mode of a work performed using the work machine to set the fuel supply to the engine.
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2. A rotation control method for controlling a rotary body that is rotated by an electric motor, comprising:
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changing a rotation speed of the rotary body in accordance with at least one of the following factors;
a setting condition of a fuel supply setting means for setting a fuel supply to an engine that is used in conjunction with the electric motor;
an operation amount of a work machine lever for operating a work machine that is driven by the engine; and
a selection condition of a work mode selecting means for selecting a work mode of a work performed using the work machine to set the fuel supply to the engine.
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3. A construction machine, comprising:
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a rotary body that is rotated by an electric motor; and
a rotation control device for controlling the rotary body, wherein the rotation control device includes a target speed command generating means that is adapted to change a target speed command value of the rotary body in accordance with at least one of the following factors;
a setting condition of a fuel supply setting means for setting a fuel supply to an engine that is used in conjunction with the electric motor;
an operation amount of a work machine lever for operating a work machine that is driven by the engine; and
a selection condition of a work mode selecting means for selecting a work mode of a work performed using the work machine to set the fuel supply to the engine.
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Specification