Haul vehicle and method for controlling haul vehicle
A haul vehicle includes a dump body, a vehicle body supporting the dump body, a traveling apparatus including driving wheels and supporting the vehicle body, a trolley power receiving apparatus to which power is supplied from a trolley wire, a fuel cell that generates power through electrochemical reaction between hydrogen and oxygen, and an electric motor that generates driving force for rotating the driving wheels on a basis of power from at least one of the trolley wire or the fuel cell.
1 . A haul vehicle comprising:
a dump body;
a vehicle body supporting the dump body;
a traveling apparatus including driving wheels and supporting the vehicle body;
a trolley power receiving apparatus to which power is supplied from a trolley wire;
a fuel cell that generates power through electrochemical reaction between hydrogen and oxygen;
an electric motor that generates driving force for rotating the driving wheels on a basis of power from at least one of the trolley wire or the fuel cell;
a shared DC/DC converter that converts voltage of the trolley wire and voltage of the fuel cell, wherein in a first state, power is supplied from the trolley wire to the electric motor via the shared DC/DC converter, and in a second state, power is supplied from the fuel cell to the electric motor via the shared DC/DC converter; and
an inverter that converts a direct current from the shared DC/DC converter into a three-phase alternating current and supplies the three-phase alternating current to the electric motor.
2 . The haul vehicle according to claim 1 , further comprising:
a first DC/DC converter that converts voltage of the trolley wire,
wherein the voltage converted by the first DC/DC converter is applied to the electric motor.
3 . The haul vehicle according to claim 1 , further comprising:
a second DC/DC converter that converts voltage of the fuel cell,
wherein the voltage converted by the second DC/DC converter is applied to the electric motor.
4 . The haul vehicle according to claim 1 ,
wherein the shared DC/DC converter steps up the voltage supplied from the fuel cell and steps down the voltage supplied from the trolley wire.
5 . The haul vehicle according to claim 1 , further comprising:
a switch mechanism that switches between the first state and the second state.
6 . The haul vehicle according to claim 5 , further comprising:
a position sensor that detects a current position of the vehicle body;
a topographical information storage unit that stores map information regarding a work site; and
an FC trolley switching section that determines whether it is a trolley section and controls the switch mechanism in such a way as to switch between the first state and the second state on a basis of the current position and the map information.
7 . The haul vehicle according to claim 1 , further comprising:
a storage battery charged with power from at least one of the trolley wire or the fuel cell,
wherein the electric motor generates the driving force on a basis of power from the storage battery.
8 . The haul vehicle according to claim 7 , further comprising:
a third DC/DC converter that converts voltage of the storage battery,
wherein the voltage converted by the third DC/DC converter is applied to the electric motor.
9 . The haul vehicle according to claim 7 , further comprising:
a trolley storage battery charging section that charges the storage battery with power from the trolley wire on a basis of a charge state of the storage battery.
10 . A haul vehicle comprising:
a dump body;
a vehicle body supporting the dump body;
a traveling apparatus including driving wheels and supporting the vehicle body;
a trolley power receiving apparatus to which power is supplied from a trolley wire;
a first storage battery charged via a charging port;
an electric motor that generates driving force for rotating the driving wheels on a basis of power from at least one of the trolley wire or the first storage battery;
a shared DC/DC converter that converts voltage of the trolley wire and voltage of a fuel cell, wherein in a first state, power is supplied from the trolley wire to the electric motor via the shared DC/DC converter, and in a second state, power is supplied from the fuel cell to the electric motor via the shared DC/DC converter; and
an inverter that converts a direct current from the shared DC/DC converter into a three-phase alternating current and supplies the three-phase alternating current to the electric motor.
11 . The haul vehicle according to claim 10 ,
wherein the shared DC/DC converter converts voltage of the trolley wire and voltage of the first storage battery.
12 . The haul vehicle according to claim 11 , further comprising:
a switch mechanism that switches between the first state and the second state.
13 . The haul vehicle according to claim 12 , further comprising:
a position sensor that detects a current position of the vehicle body;
a topographical information storage unit that stores map information regarding a work site; and
a storage battery trolley switching section that controls the switch mechanism in such a way as to switch between the first state and the second state on a basis of the current position and the map information.
14 . The haul vehicle according to claim 10 , further comprising:
a second storage battery charged with power from at least one of the trolley wire or the first storage battery,
wherein the electric motor generates the driving force on a basis of power from the second storage battery.
15 . The haul vehicle according to claim 14 , further comprising:
a second DC/DC converter that converts voltage of the second storage battery,
wherein the voltage converted by the second DC/DC converter is applied to the electric motor.
16 . The haul vehicle according to claim 14 , further comprising:
a trolley storage battery charging section that charges the second storage battery with power from the trolley wire on a basis of a charge state of the second storage battery.
17 . A method of controlling a haul vehicle, the method comprising:
supplying power from a trolley wire to the haul vehicle;
causing a fuel cell of the haul vehicle to generate power;
supplying power from at least one of the trolley wire or the fuel cell to an electric motor of the haul vehicle;
causing the haul vehicle to travel on driving force generated by the electric motor
using a shared DC/DC converter to convert voltage of the trolley wire and voltage of the fuel cell, wherein in a first state, power is supplied from the trolley wire to the electric motor via the shared DC/DC converter, and in a second state, power is supplied from the fuel cell to the electric motor via the shared DC/DC converter; and
using an inverter to convert a direct current from the shared DC/DC converter into a three-phase alternating current and suppling the three-phase alternating current to the electric motor.