Patent ID: 8812202
Filing Date: 2014-08-19
Classification: B60T,E02F,F15B

Abstract:
1. A drive controller of an operating machine, the drive controller comprising: a hydraulic motor configured to be driven by hydraulic oil supplied from a hydraulic pump through a hydraulic motor circuit; an electric motor configured to drive a structure in cooperation with the hydraulic motor, a remote control valve configured to determine an operation amount of the structure; an electric motor torque calculation portion configured to calculate torque to be output from the electric motor; a hydraulic motor torque calculation portion configured to calculate torque to be output from the hydraulic motor; a control valve configured to control a flow rate of the hydraulic oil supplied from the hydraulic pump to the hydraulic motor in accordance with input pilot pressure; a solenoid-operated reducing valve configured to reduce the pilot pressure based on an input opening position control signal; a controller configured to cause the electric motor to output the torque calculated by the electric motor torque calculation portion and output the input opening position control signal to the solenoid-operated reducing valve to cause the hydraulic motor to output the torque calculated by the hydraulic motor torque calculation portion, wherein the electric motor torque calculation portion and the hydraulic motor torque calculation portion respectively calculate the torque to be output from the electric motor and the torque to be output from the hydraulic motor such that a sum of the torque to be output from the electric motor and the torque to be output from the hydraulic motor becomes equal to an entire torque corresponding to the operation amount of the structure determined by the remote control valve.