Electric work machine

Abstract

Provided is an electric work machine that allows an operator to know information on the state of power supply to the motor. The electric work machine includes: a work machine body connectable to a power supply unit; an electric motor mounted on the work machine body and driven by electric power supplied from a power supply unit; a hydraulic pump mounted on the work machine body and driven by an electric motor to discharge hydraulic fluid; a hydraulic actuator mounted on the work machine body and actuated by hydraulic fluid; a motor controller that detects a power supply state which is a state of supply of electric power from the power supply unit to the electric motor; and a notification unit that notifies an operator of information on the detected power supply state.

1 . An electric work machine connectable to a power supply unit to be supplied with electric power from the power supply unit, comprising:
 a work machine body connectable to the power supply unit;   an electric motor mounted on the work machine body and driven by electric power supplied from the power supply unit;   a hydraulic pump mounted on the work machine body and driven by the electric motor that is driven by the electric power to discharge hydraulic fluid;   at least one hydraulic actuator mounted on the work machine body and actuated by hydraulic fluid that is discharged by the hydraulic pump;   a motor controller that detects a power supply state which is a state of supply of electric power to the electric motor from the power supply unit; and   a notification unit that notifies an operator of information on the power supply state detected by the motor controller.   
     
     
         2 . The electric work machine according to  claim 1 , wherein the electric motor is driven by an AC power having a plurality of phases, the power supply state detected by the motor controller including at least one of voltage and current for at least two phases of the plurality of phases. 
     
     
         3 . The electric work machine according to  claim 1 , wherein the motor controller is configured to make an abnormality judgment, which is a judgment on whether or not the power supply state is abnormal, the driving state of the motor including a plurality of operating phases, and the motor controller stores a plurality of abnormality judgment conditions for making the abnormality judgment, the plurality of abnormality judgment conditions being set for the plurality of operating phases, respectively. 
     
     
         4 . The electric work machine according to  claim 3 , wherein the plurality of operating phases includes a pre-starting phase in which rotation of the electric motor is stopped, a starting phase in which the electric motor is starting, and a running phase in which the electric motor is running after the starting. 
     
     
         5 . The electric work machine according to  claim 1 , wherein the at least one hydraulic actuator includes a traveling motor for bringing the work machine body into traveling motion.