WORK VEHICLE

摘要

There are provided an electric storage device (11), inverter devices (7, 10), a converter device (12) for converting the voltage of circuits to which the inverter devices (7, 10) are connected, a motor generator (6) for driving a hydraulic pump (4) using alternate current from the inverter device (7), a motor (9) for driving wheels (61) using alternate current from the inverter device (10), and a control device (200) for controlling the inverter devices (7, 10). When any of the devices necessary for supplying the current to the motor (9) has developed a failure, the control device (200) drives the motor (9) by getting another normal device to perform another process corresponding to the process that has been performed by the malfunctioned device before the failure. This makes it possible to continue travel movement even when part of a travel power supply system has developed a failure.

主权项

1. A work vehicle comprising:
an engine; a hydraulic pump which is driven by the engine and drives hydraulic actuators; an electric storage device which stores direct current power; a first and second inverter devices which convert direct current to alternate current; a converter device which converts voltage of a circuit to which the first and second inverter devices are connected; a motor generator which generates drive torque of the hydraulic pump using alternate current from the first inverter device; a motor which generates drive torque of a vehicle using alternate current from the second inverter device; and a control device which controls the first and second inverter devices, wherein when any of devices connected to the circuit and necessary for supplying current to the motor has failure, the control device causes a normal one of the devices to perform the same process as, or a process corresponding to, a process that has been carried out by the device with the failure before the failure occurs so that the motor is driven via the second inverter device.