WORK VEHICLE
    41.
    发明公开
    WORK VEHICLE 审中-公开

    公开(公告)号:EP3835102A1

    公开(公告)日:2021-06-16

    申请号:EP19846604.7

    申请日:2019-08-09

    摘要: In an electric drive system in which a battery is not connected to a DC bus, even when a load on a traveling electric motor increases suddenly, it is made possible to avoid such a situation that the DC bus voltage drops to a level equal to or lower than an operating voltage of an inverter and the inverter stops working. To this end, a DC bus voltage drop prevention device controls such that, when the voltage of the DC bus drops below a first threshold value, the output torque of the traveling electric motor is decreased according to an amount of decrease in the voltage of the DC bus, and when the voltage of the DC bus drops below a second threshold voltage lower than the first threshold voltage, the output torque of the traveling electric motor is decreased to zero or a value within a range of magnitude with which a work vehicle stays stationary on a level ground.

    BATTERY CONTROL DEVICE, BATTERY CONTROL SYSTEM, AND BATTERY CONTROL METHOD

    公开(公告)号:EP3806227A1

    公开(公告)日:2021-04-14

    申请号:EP19810309.5

    申请日:2019-03-11

    申请人: Hitachi, Ltd.

    摘要: The present invention is provided with a charging rate detection unit that, on the basis of information about characteristics of a storage battery and a physical quantity measured by a measurement unit, detects a charging rate of the storage battery, an error detection unit that detects a detection error of the charging rate, and a charging rate control unit that controls the charging rate of the storage battery. The error detection unit is configured to detect, in real time, an error of the charging rate of the storage battery detected by the charging rate detection unit. The charging rate detection unit is configured to switch, on the basis of the error of the charging rate detected by the error detection unit, the charging rate detection method for detecting the charging rate of the storage battery to another charging rate detection method where necessary, so as to ameliorate the error. The charging rate control unit is configured to transmit, to a host control device, a charging/discharging command for providing instructions on charging or discharging of the storage battery, in accordance with a result of detection by the error detection unit.

    LOCOMOTIVE PROPULSION SYSTEM
    44.
    发明公开

    公开(公告)号:EP3604022A1

    公开(公告)日:2020-02-05

    申请号:EP19189048.2

    申请日:2019-07-30

    摘要: A locomotive propulsion system onboard a locomotive platform includes a traction motor, a propulsion electrical storage device, an ancillary electrical storage device, and a controller. The propulsion electrical storage device is electrically connected to the traction motor via a propulsion circuit, and the ancillary electrical storage device is electrically connected to the traction motor via an ancillary circuit. The controller is configured to direct the ancillary electrical storage device to supply electric current to the traction motor via the ancillary circuit to power the traction motor during an elevated demand period. At an end of the elevated demand period, the controller is configured to control the ancillary circuit to stop conducting electric current from the ancillary electrical storage device and to direct the propulsion electrical storage device to supply electric current to the traction motor via the propulsion circuit to power the traction motor.

    MANEUVERING DRIVE SYSTEM, VEHICLE AND METHOD FOR CONTROLLING A MANEUVERING DRIVE SYSTEM

    公开(公告)号:EP4403404A1

    公开(公告)日:2024-07-24

    申请号:EP23157202.5

    申请日:2023-02-17

    发明人: Zhao, Quansheng

    IPC分类号: B60L50/15

    摘要: The present invention relates to a maneuvering drive system (3) for a vehicle, in particular for a vehicle without its own drive, preferably for a trailer, comprising at least two, in particular exactly two drive units (4), which are designed to be attached to a vehicle in order to drive a wheel (2) of the vehicle, each drive unit (4) comprising
    a rotatably mounted drive element, which is designed and arranged such that it can be brought into abutment with a wheel (2) of the vehicle to drive the vehicle,
    an electrical drive motor (10) designed to set the drive element in rotation and having a plurality of conductors,
    wherein at least one control device (23) is provided, which control device (23) is arranged and designed such that it controls the speed and direction of rotation of the rotor of at least one drive motor (10) assigned thereto.

    NACELLE ELEVATRICE DOTEE D'UN EMPLACEMENT POUR UN GROUPE ELECTROGENE AMOVIBLE

    公开(公告)号:EP4321472A2

    公开(公告)日:2024-02-14

    申请号:EP23195549.3

    申请日:2020-01-29

    申请人: Haulotte Group

    摘要: La nacelle élévatrice comprend un emplacement d'accueil (39) pour le montage amovible d'un groupe électrogène. L'emplacement d'accueil (39) comprend une structure de positionnement (101) du groupe électrogène (40) par coopération de forme avec une structure de positionnement complémentaire du groupe électrogène, qui est apte à corriger à la fois un défaut de centrage du groupe électrogène par rapport à l'emplacement d'accueil, et un défaut d'orientation angulaire du groupe électrogène par rapport à la direction d'amenée/retrait (F). L'emplacement d'accueil (39) comprend aussi une butée (103) pour positionner le groupe électrogène dans la direction d'amenée/retrait (F) et des moyens de fixation amovible (104) pour maintenir fermement le groupe électrogène (40) et le libérer aux fins de retrait. Grâce à cette structure, la mise en place du groupe électrogène sur la nacelle élévatrice, par exemple à l'aide d'un chariot élévateur, est facilitée.