Hydraulic System, Work Vehicle, Control Method, and Computer Program
AssigneeKubota Corporation
InventorYasuhiro Manji
Life of this patent
Estimating the term…
Abstract
A technique capable of appropriately controlling an electric motor that drives a hydraulic pump is provided. A hydraulic system S according to the present disclosure includes a hydraulic pump 32, a supply oil passage 58 that supplies hydraulic oil from the hydraulic pump 32 to a front loader 4 operated by hydraulic pressure, a pressure sensor 36 that detects a hydraulic pressure in the supply oil passage 58, a pump motor 30 that drives the hydraulic pump 32, a drive circuit 22a that controls the pump motor 30 by a control command based on a torque command value, and a processing device 18 that performs generation processing of generating the torque command value on the basis of a rotation speed of the pump motor 30 and an output of the pressure sensor 36.
Claims7
A hydraulic system comprising:
- a hydraulic pump;
- a supply oil passage that supplies hydraulic oil from the hydraulic pump to a working device operated by hydraulic pressure;
- a sensor that detects a hydraulic pressure in the supply oil passage;
- an electric motor that drives the hydraulic pump;
- a drive circuit that controls the electric motor by a control command based on a torque command value;
- and
- a processing device that performs generation processing of generating the torque command value on a basis of a rotation speed of the electric motor and an output of the sensor.
A control method for an electric motor that drives a hydraulic pump for supplying hydraulic oil to a working device, the method comprising:
- acquiring an output of a sensor that detects a hydraulic pressure in a supply oil passage for supplying the hydraulic oil from the hydraulic pump to the working device;
- generating a torque command value on a basis of a rotation speed of the electric motor and an output of the sensor;
- and
- providing a control command based on the torque command value to a drive circuit that controls the electric motor.
A non-transitory computer readable storage medium storing a computer program for causing a computer to execute control of an electric motor that drives a hydraulic pump for supplying hydraulic oil to a working device, the computer program causing the computer to execute:
- acquiring an output of a sensor that detects a hydraulic pressure in a supply oil passage for supplying the hydraulic oil from the hydraulic pump to the working device;
- generating a torque command value on a basis of a rotation speed of the electric motor and an output of the sensor;
- and
- providing a control command based on the torque command value to a drive circuit that controls the electric motor.
Dependencies are inferred from the claim text.