Power control device, power control method, and power control program

Abstract

A power control device in an electric construction machine including a lower traveling body, an upper rotating body that is attached to the lower traveling body, a boom attached to the upper rotating body, an arm that is attached to the boom, a bucket that is attached to the arm, and a battery that supplies power to each actuator includes: a drive information acquisition unit that acquires drive information of each actuator; an identification unit that identifies the operation performed by the electric construction machine based on the drive information; and a determination unit that determines power to be supplied to the plurality of drive units in accordance with the identified operation of the electric construction machine.

What is claimed is: 
     
         1 . A power control device in a construction machine equipped with a plurality of joint components and a power source that supplies power to a plurality of drive units that drive the plurality of joint components, comprising:
 a drive information acquisition unit that acquires drive information of the plurality of drive units;   an identification unit that identifies the operation performed by the construction machine by the plurality of joint components based on the drive information; and   a determination unit that determines power to be supplied to the plurality of drive units in accordance with the identified operation of the construction machine.   
     
     
         2 . The power control device according to  claim 1 , wherein
 the drive information is at least one of an operation command received by an operation unit of the construction machine and a drive command for each of the plurality of drive units, and wherein   the identification unit identifies the operation performed by the construction machine based on the correspondence between the operation and the drive information stored in a storage unit and the acquired drive information.   
     
     
         3 . The power control device according to  claim 1 , wherein the joint component is at least one of a lower traveling body that can travel on the ground, an upper rotating body that is rotatably attached to the lower traveling body, a boom capable of being raised and lowered that is attached to the upper rotating body, an arm that is bendably attached to the boom, and a bucket that is bendably attached to the arm. 
     
     
         4 . The power control device according to  claim 3 , wherein
 the operation of the construction machine is a traveling operation, and wherein   the determination unit determines that more power is supplied to the drive unit that drives the lower traveling body than power supplied to the drive units that drive the upper rotating body, the boom, the arm, and the bucket.   
     
     
         5 . The power control device according to  claim 3 , wherein
 the operation of the construction machine is a rotating operation, and wherein   the determination unit determines that more power is supplied to the drive unit that drives the upper rotating body than power supplied to the drive units that drive the lower traveling body, the boom, the arm, and the bucket.   
     
     
         6 . The power control device according to  claim 3 , wherein
 the operation of the construction machine is at least one of a digging operation, a rotating and loading operation, a trench digging operation, and a ground leveling operation using the boom, the arm, and the bucket, and wherein   the determination unit determines that more power is supplied to the drive units that drive the boom, the arm, and the bucket than power supplied to the drive unit that drives the lower traveling body.   
     
     
         7 . The power control device according to  claim 6 , further comprising a weight acquisition unit that acquires information indicating a weight of an object carried by the bucket, wherein
 the determination unit determines that more power is supplied to the drive unit that bears more load in accordance with the weight of the carried object acquired by the weight acquisition unit, than power supplied to the drive unit that bears less load, among the each drive unit of the upper rotating body, the boom, the arm, and the bucket.   
     
     
         8 . The power control device according to  claim 3 , further comprising a distance acquisition unit that acquires a distance of the bucket from the rotating axis of the upper rotating body, wherein
 the determination unit determines that the larger the distance acquired by the distance acquisition unit, the larger the power supplied to the drive unit of the upper rotating body.   
     
     
         9 . The power control device according to  claim 3 , wherein the determination unit determines that the regenerative power collected in the respective drive units of the boom, the arm, and the bucket is allocated among the respective drive units, and excess regenerative power exceeding the sum of the power demand of each drive unit is returned to the power source side. 
     
     
         10 . The power control device according to  claim 1 , wherein
 each of the drive units includes a motor that generates rotational power, and wherein   the drive information includes at least one of a rotation speed of each of the motors and a current command value of the motor.   
     
     
         11 . The power control device according to  claim 1 , further comprising:
 a power demand acquisition unit that acquires power demand of each of the plurality of drive units; and   an available power acquisition unit that acquires at least one of a charge rate and a dischargeable amount of a battery as available power, wherein   the determination unit determines the power to be supplied to the plurality of drive units in accordance with the identified operation of the construction machine when the total of the power demand exceeds the available power.   
     
     
         12 . A power control method in a construction machine equipped with a plurality of joint components and a power source that supplies power to a plurality of drive units that drive the plurality of joint components, comprising:
 a drive information acquisition step that acquires drive information of the plurality of drive units;   an identification step that identifies the operation performed by the construction machine by the plurality of joint components based on the drive information; and   a determination step that determines power to be supplied to the plurality of drive units in accordance with the identified operation of the construction machine.   
     
     
         13 . A power control program in a construction machine equipped with a plurality of joint components and a power source that supplies power to a plurality of drive units that drive the plurality of joint components, causing a computer to perform:
 a drive information acquisition step that acquires drive information of the plurality of drive units;   an identification step that identifies the operation performed by the construction machine by the plurality of joint components based on the drive information; and   a determination step that determines power to be supplied to the plurality of drive units in accordance with the identified operation of the construction machine.