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15 条记录 (耗时 0.018 秒)

    Drive System
    11.
    发明公开
    Drive System 审中-公开

    公开(公告)号：US20230253858A1

    公开(公告)日：2023-08-10

    申请号：US18012349

    申请日：2021-05-20

    申请人： Hitachi Construction Machinery Co., Ltd.

    发明人： Kazuo NISHIHAMA ,  Masatoshi YOSHIMURA ,  Toshihiko WATANABE ,  Toshihiko ISHIDA ,  Seiji ISHIDA

    IPC分类号： H02K7/18 ,  H02K1/16 ,  H02K1/26 ,  H02K3/34 ,  H02P27/06

    CPC分类号： H02K7/1807 ,  H02K1/16 ,  H02K1/26 ,  H02K3/34 ,  H02P27/06

    摘要： An object of the present invention is to provide a drive system that is provided with an induction generator having a primary winding including a main winding and an auxiliary winding and a secondary conductor, can vary the voltage of the main winding, and can increase the maximum output power of the auxiliary winding. Therefore, provided is a drive system, which is provided with an induction generator having a primary winding including a main winding and an auxiliary winding and a secondary conductor, including: a starting battery that starts the induction generator; a traction inverter that drives a traction motor; an auxiliary device inverter that drives an auxiliary device motor; a rectifier the input side of which is connected to the main winding and the output side of which is connected to the traction inverter; and a power generation inverter the output side of which is connected to the auxiliary winding and the input side of which is connected to the auxiliary device inverter and the starting battery.

    Construction Machine
    12.
    发明申请
    Construction Machine 有权

    公开(公告)号：US20220274487A1

    公开(公告)日：2022-09-01

    申请号：US17260614

    申请日：2019-07-04

    申请人： Hitachi Construction Machinery Co., Ltd.

    发明人： Toshihiko WATANABE ,  Seiji ISHIDA ,  Ken TAKEUCHI

    IPC分类号： B60L3/00 ,  E02F9/20 ,  B60L3/04 ,  B60L50/61 ,  B60L53/22

    摘要： In a case of a normal operation, a battery controller (22) assumes a normal operation mode and permits charging and discharging of a battery module (21). Upon receiving a discharge command from a vehicle body controller (17) for completely discharging the battery module (21), the battery controller (22) assumes a discharge mode to discharge the battery module (21) to reach a safe voltage level and store discharge information. Upon reading out the discharge information, the battery controller (22) assumes a discharge prohibition mode to prohibit charging and discharging of the battery module (21).

    Construction Machine
    13.
    发明申请
    Construction Machine 有权

    公开(公告)号：US20210404146A1

    公开(公告)日：2021-12-30

    申请号：US16491399

    申请日：2018-03-15

    申请人： Hitachi Construction Machinery Co., Ltd.

    发明人： Seiji ISHIDA ,  Itaru NAYA

    IPC分类号： E02F9/20 ,  E02F3/36 ,  E02F3/42 ,  E02F9/22

    摘要： An electricity storage device (20) includes voltage detectors (25A) to (25C) detecting cell voltages (VcA) to (VcC) and a controller (26) controlling the cell voltages (VcA) to (VcC). The controller (26) includes a balancing control section (27) performing balancing control reducing deviations of the cell voltages (VcA) to (VcC), a maximum cell voltage calculating section (28) calculating a maximum cell voltage (Vmax) in the cell voltages (VcA) to (VcC), a minimum cell voltage calculating section (29) calculating a minimum cell voltage (Vmin) in the cell voltages (VcA) to (VcC), and an abnormality detecting section (34) detecting an abnormality of the electricity storage device (20) in accordance with whether or not a differential voltage (ΔV) between the maximum cell voltage (Vmax) and the minimum cell voltage (Vmin) is within a range of a reference differential voltage (ΔVstd1) calculated based on a history of the balancing control performed.

    Construction Machine
    14.
    发明申请
    Construction Machine 有权

    公开(公告)号：US20210180293A1

    公开(公告)日：2021-06-17

    申请号：US16081754

    申请日：2017-03-08

    申请人： Hitachi Construction Machinery Co., Ltd.

    发明人： Makoto ISHIJIMA ,  Seiji ISHIDA ,  Kenta TANIGAKI

    IPC分类号： E02F9/20

    摘要： A low idling controller (26A) switches an idling state flag from “clear” to “set” upon detecting a non-operation of an operating device (14). A rotational speed controller (26B) switches a rotational speed command from a set rotational speed by a rotational speed command device (27) to a low idling rotational speed based upon the idling state flag. At this time, an engine (8) drives in the low idling rotational speed lower than the set rotational speed. A gate controller (24) stops switching of an inverter (23) while the low idling controller (26A) is lowering a rotational speed of the engine (8).