Transport vehicle and control method for transport vehicle

Abstract

To suppress environmental pollution at a work site.SOLUTION: A transportation vehicle includes: a dump body; a vehicle body that supports the dump body; a travel device that has drive wheels and supports the vehicle body; a trolley power reception device that is supplied with power from a trolley wire; a bidirectional DC / DC converter; a storage battery that is charged with power supplied from the trolley wire via the bidirectional DC / DC converter; an electric motor that generates driving force for rotating the drive wheels; and a switch mechanism that switches between a first state where power is supplied from the trolley wire to the electric motor via the bidirectional DC / DC converter and a second state where power is supplied from the storage battery to the electric motor via the bidirectional DC / DC converter.SELECTED DRAWING: Figure 3

Claims

1. Dump body and A vehicle body that supports the aforementioned dump body, A running gear having drive wheels and supporting the vehicle body, A trolley power receiving device that receives power from the trolley wire, A bidirectional DC / DC converter, A capacitor that is charged by power supplied from the trolley wire via the bidirectional DC / DC converter, An electric motor that generates a driving force to rotate the aforementioned drive wheels, A switch mechanism for switching between a first state in which power is supplied to the electric motor from the trolley wire via the bidirectional DC / DC converter and a second state in which power is supplied to the electric motor from the capacitor via the bidirectional DC / DC converter, The system includes a capacitor trolley switching unit that controls the aforementioned switch mechanism, The work site's travel path is defined as having sections for operation using a power storage device, sections for coasting, and sections for operation using trolley power supply. The aforementioned coasting section is defined between the aforementioned capacitor running section and the aforementioned trolley power supply running section. The aforementioned capacitor trolley switching unit is In the aforementioned battery-powered driving section, the switch mechanism is controlled to reach the second state. In the trolley power supply travel section, the switch mechanism is controlled to reach the first state. In the aforementioned coasting section, the switch mechanism is controlled such that power reception from the trolley wire is stopped and power output from the capacitor is stopped. Transport vehicle.

2. A position sensor for detecting the current position of the vehicle body, It includes a terrain information storage unit that stores map information of the work site, The capacitor trolley switching unit controls the switch mechanism so that it switches between the first state and the second state based on the current position and the map information. The transport vehicle according to claim 1.

3. The power supply to the transport vehicle from the trolley wire, The power supplied from the trolley wire via a bidirectional DC / DC converter is used to charge the capacitor of the transport vehicle, Switching between a first state in which power is supplied from the trolley wire to the electric motor of the transport vehicle via the bidirectional DC / DC converter, and a second state in which power is supplied from the capacitor to the electric motor via the bidirectional DC / DC converter, This includes moving the transport vehicle using the driving force generated by the electric motor, The work site's travel path is defined as having sections for operation using a power storage device, sections for coasting, and sections for operation using trolley power supply. The aforementioned coasting section is defined between the aforementioned capacitor running section and the aforementioned trolley power supply running section. In the aforementioned battery-powered travel section, the second state is reached. In the trolley power supply section, the first state is reached. During the coasting section, the power supply from the trolley wire is stopped, and the power output from the capacitor is stopped. A method for controlling transport vehicles.

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