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US 12,673,560 B2Granted
Haul vehicle and method for controlling haul vehicle
AssigneeKomatsu Ltd.
InventorNatsuki Watanabe
Life of this patent
Estimating the term…
Abstract
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.
Claims17
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.
6 more elements
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.
6 more elements
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.
4 more elements
Dependencies are inferred from the claim text.