Abstract: An electric work vehicle includes a storage battery to be charged and discharged, a motor drivable by electric power from the storage battery, a travel device drivable by the motor, a regenerative mechanism to charge the storage battery with electric power that the motor generates when the body is decelerated, a charged state detector to detect a charged state of the storage battery, and a controller configured or programmed to, in accordance with the charged state detected by the charged state detector, reduce torque of the motor when the motor generates the electric power to be supplied to the storage battery.

Abstract: An electric work vehicle includes a battery, an inverter to convert output from the battery to AC power, a motor drivable by the converted AC power, a travel device drivable by the motor, a controller configured or programmed to control a current flowing through the motor by operating the inverter in accordance with rotational speed information indicative of a rotational speed of the motor and a required rotational speed for the motor, a DC/DC converter to convert an output voltage of the battery to a voltage applicable to the controller, and a current limiter to limit the current flowing through the motor when a temperature of the inverter is higher than a predetermined temperature. The controller is configured or programmed to limit the current flowing through the motor when at least one temperature of the inverter, the motor, or the DC/DC converter is higher than a predetermined temperature.

Abstract: An electric work vehicle includes a battery in a machine body, an inverter to convert DC power output from the battery to AC power, a motor drivable by the AC power converted by the inverter, a rotational speed detector to obtain rotational speed information indicative of a rotational speed of the motor, a travel device drivable by the motor, an operator to change a required rotational speed required for the motor, and a controller configured or programmed to control a current flowing through the motor by operating the inverter in accordance with the rotational speed information and the required rotational speed. When a load applied to the motor is higher than a load set in advance, the controller is configured or programmed to stop driving the motor irrespective of the required rotational speed.

Abstract: An electric work vehicle includes a battery in a machine body, an inverter to convert DC power output from the battery to AC power, a motor drivable by the AC power converted by the inverter, a rotational speed detector to obtain rotational speed information of the motor, a travel device drivable by the motor, an operator to change a required rotational speed of the motor, a storage to store an output map defining a relationship between a torque value and the rotational speed of the motor, and a controller to control a current flowing through the motor by operating the inverter based on the rotational speed information, the required rotational speed, and the output map. The output map has a shape similar to that of a torque curve of an engine in a high rotation range where the rotational speed of the motor is at least a predetermined rotational speed.

Abstract: A tractor including a vehicle body, a hood at a front portion of the vehicle body, a traveling device to support the vehicle body so that the vehicle body is capable of traveling, a driving motor to drive the traveling device, a PTO shaft to transmit power to a working machine, a fuel cell system including a fuel cell and operable to supply electricity generated by the fuel cell to the driving motor, and a battery to store electricity generated by the fuel cell. The fuel cell and the battery are disposed inside the hood.

Abstract: A working machine includes a machine body, an engine on the machine body, a motor/generator to perform an assisting action in which the motor/generator functions as a motor to assist the engine in driving and an electricity generating action in which the motor/generator functions as a generator to generate electricity using power from the engine, a working device to function using power from the engine and the motor/generator, a work operation actuator for operation of the working device, an action controller to cause the assisting action to be performed when a rotation speed of the engine is equal to or less than a first rotation speed and cause the electricity generating action to be performed when the rotation speed of the engine is equal to or greater than a second rotation speed greater than the first rotation speed, and a speed controller to change the first rotation speed or the second rotation speed according to an operation amount of the work operation actuator.

Abstract: A working machine includes a machine body, an engine on the machine body, a motor/generator to perform an assisting action in which the motor/generator functions as a motor to assist the engine in driving and an electricity generating action in which the motor/generator functions as a generator to generate electricity using power from the engine, a battery to store electricity generated by the motor/generator, an operation actuator to perform an operation of the machine body, a starting action determiner to determine, upon operation of the operation actuator, whether the operation corresponds to a starting action for the machine body, a first setter to set, if the starting action determiner determines that the operation of the operation actuator corresponds to the starting action, a torque of the motor/generator for the assisting action or the electricity generating action to a first torque, and a second setter to set, if the starting action determiner determines that the operation of the operation actuator d

Abstract: A fuel cell system includes a hydrogen tank to store hydrogen, a fuel cell to receive hydrogen gas from the hydrogen tank to generate electricity, a temperature controller to adjust a temperature inside the hydrogen tank, and a control unit to control the temperature controller based on the amount of hydrogen remaining in the hydrogen tank, the control unit being configured to increase the temperature inside the hydrogen tank when the amount of the remaining hydrogen is equal to or less than a first predetermined value.

Abstract: A hydrogen supply system that supplies hydrogen gas to a fuel cell and causes the fuel cell to generate electricity includes a plurality of hydrogen tanks that each store hydrogen gas, and a hydrogen gas supply path that supplies the hydrogen gas to the fuel cell from each of the plurality of hydrogen tanks. At least one hydrogen tank of the plurality of hydrogen tanks is a first reserve tank that is connected to a hydrogen gas collecting pipe or a hydrogen gas recovery pipe, and that stores hydrogen gas that was not used in generating electricity in the fuel cell.

Abstract: A working device to be connected to a traveling vehicle having a prime mover, the working device being configured to perform an agricultural work, includes a working portion to rotate to perform an agricultural work, an electric motor to be driven by electric power, a power transmission mechanism to which power generated by the electric motor is inputted, configured to transmit the power to the working portion; and a regeneration resistor to consume a regenerative power generated in the electric motor, the regeneration resistor being arranged at a position to be cooled by wind generated by rotation of the working portion.

Abstract: An electric working machine includes battery packs, a working device to be driven by electric power discharged from the battery packs, one or more battery monitors to monitor states of the battery packs, and a controller to control charging and discharging of the battery packs, wherein, in a discharging mode for driving the working device, the controller selects one of the battery packs as a discharging battery pack for supplying electric power to the working device, based on a result of monitoring the battery packs by the one or more battery monitors, and in a charging mode, the controller selects one of the battery packs as a charging battery pack to be charged, based on a result of monitoring the battery packs by the one or more battery monitors.

Abstract: A fuel cell system includes a hydrogen tank to store hydrogen, a fuel cell to receive hydrogen gas from the hydrogen tank to generate electricity, a temperature controller to adjust a temperature inside the hydrogen tank, and a control unit to control the temperature controller based on the amount of hydrogen remaining in the hydrogen tank, the control unit being configured to increase the temperature inside the hydrogen tank when the amount of the remaining hydrogen is equal to or less than a first predetermined value.

Abstract: A hydrogen supply system that supplies hydrogen gas to a fuel cell and causes the fuel cell to generate electricity includes a plurality of hydrogen tanks that each store hydrogen gas, and a hydrogen gas supply path that supplies the hydrogen gas to the fuel cell from each of the plurality of hydrogen tanks. At least one hydrogen tank of the plurality of hydrogen tanks is a first reserve tank that is connected to a hydrogen gas collecting pipe or a hydrogen gas recovery pipe, and that stores hydrogen gas that was not used in generating electricity in the fuel cell.

Abstract: A spraying support system for a working machine, includes: a support device including a plan creator portion to create a spraying plan representing a relation between field information relating to a field to which spray substance is sprayed and spraying information including spraying amount of the spray substance; a plan obtainer device provided to a working machine having a sprayer device to spray the spray substance and configured to obtain the spraying plan created by the plan creator portion; and a spraying controller device to control a sprayer portion of the sprayer device based on the spraying information of the spraying plan obtained by the plan obtainer device.

Abstract: A generator unit to be attached to a traveling vehicle that has a prime mover and a PTO shaft to transmit power from the prime mover, includes: a generator; an input shaft having: a first connector portion configured to be connected to the PTO shaft; and a second connector portion configured to be connected to a working device to be connected to the traveling vehicle; a transmitter mechanism to transmit, to the generator, power supplied from the PTO shaft, the power being inputted from the first connector portion to the input shaft; and an attachment frame having: an attachment portion to which the generator, the input shaft, and the transmitter mechanism are attached; and a mounting portion configured to be mounted to the traveling vehicle.

Abstract: A working machine includes a machine body, an engine on the machine body, a motor/generator to perform an assisting action in which the motor/generator functions as a motor to assist the engine in driving and an electricity generating action in which the motor/generator functions as a generator to generate electricity using power from the engine, a working device to function using power from the engine and the motor/generator, a work operation actuator for operation of the working device, an action controller to cause the assisting action to be performed when a rotation speed of the engine is equal to or less than a first rotation speed and cause the electricity generating action to be performed when the rotation speed of the engine is equal to or greater than a second rotation speed greater than the first rotation speed, and a speed controller to change the first rotation speed or the second rotation speed according to an operation amount of the work operation actuator.

Abstract: A working machine includes a machine body, an engine on the machine body, a motor/generator to perform an assisting action in which the motor/generator functions as a motor to assist the engine in driving and an electricity generating action in which the motor/generator functions as a generator to generate electricity using power from the engine, a battery to store electricity generated by the motor/generator, an operation actuator to perform an operation of the machine body, a starting action determiner to determine, upon operation of the operation actuator, whether the operation corresponds to a starting action for the machine body, a first setter to set, if the starting action determiner determines that the operation of the operation actuator corresponds to the starting action, a torque of the motor/generator for the assisting action or the electricity generating action to a first torque, and a second setter to set, if the starting action determiner determines that the operation of the operation actuator d

Abstract: A working machine includes: a first generator having: a rotor to be rotated by power from a PTO shaft; a rotor coil provided to the rotor; and a stator coil to generate electricity when magnetizing current is applied to the rotor coil; a working device to be operated by the electricity generated by the first generator; and a converter device to convert surplus electricity not consumed by the working device into the magnetizing current to be applied to the rotor coil.

Abstract: A working device connected to a traveling vehicle having a prime mover and configured to perform an agricultural work, includes: a working portion to perform an agricultural work; an electric motor to be driven by electric power; a power transmission mechanism to which power generated by the electric motor is inputted, configured to transmit the power to the working portion; a regeneration resistor to consume a regenerative power generated in the electric motor; a switch portion to switch, between a connecting state and a shut-off state, a state established between the electric motor and the regeneration resistor; and a controller portion to control driving of the electric motor and switching of the switch portion.

Abstract: The working machine includes a machine body, an engine provided on the machine body, a motor generator to be operated as a motor to assist driving of the engine in an assisting operation and to be operated as a generator by power of the engine to generate electricity in a generating operation, a battery to store the electricity generated by the motor generator, an acceleration sensor to measure acceleration of the machine body, and a controller to selectively set either one of the assisting operation and the generating operation based on the acceleration of the machine body measured by the acceleration sensor.