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Drive system for electric construction machine
In an electric construction machine, when the remaining amount of power stored in a power storage device is small, a decrease in the remaining amount of power stored when transitioning to automatic idle control is suppressed, and the remaining amount of power stored in the power storage device is maintained for a long period of time. Therefore, when a plurality of operation devices (20, 21, 22, 23a, 23b, 24) are not operated and a predetermined time (TD) has elapsed, a controller (31) controls the rotational speed of the electric motor (1) so as to reduce the rotational speed of the electric motor (1) from a predetermined rotational speed to an idle rotational speed (Ni). Furthermore, when the amount of remaining power in the power storage device (33) is equal to or less than the first threshold value (Ea), the predetermined time (TD) is set to be shorter than when the amount of remaining power is greater than the first threshold value (Ea).
电动式工程机械中，当蓄电装置的蓄电剩余量少时，抑制当向自动怠速控制转移时的蓄电剩余量的减少，长时间保持蓄电装置的蓄电剩余量。为此，控制器(31)在多个操作装置(20、21、22、23a、23b、24)均没有被操作且经过了规定时间(TD)时，以使电动马达(1)的转速从规定转速降低至怠速转速(Ni)的方式控制电动马达(1)的转速。另外，当蓄电装置(33)的蓄电剩余量为第1阈值(Ea)以下时，与蓄电剩余量比第1阈值(Ea)多时相比，将规定时间(TD)设定得短。
Drive system for electric construction machine
In an electric construction machine, when the remaining amount of power stored in a power storage device is small, a decrease in the remaining amount of power stored when transitioning to automatic idle control is suppressed, and the remaining amount of power stored in the power storage device is maintained for a long period of time. Therefore, when a plurality of operation devices (20, 21, 22, 23a, 23b, 24) are not operated and a predetermined time (TD) has elapsed, a controller (31) controls the rotational speed of the electric motor (1) so as to reduce the rotational speed of the electric motor (1) from a predetermined rotational speed to an idle rotational speed (Ni). Furthermore, when the amount of remaining power in the power storage device (33) is equal to or less than the first threshold value (Ea), the predetermined time (TD) is set to be shorter than when the amount of remaining power is greater than the first threshold value (Ea).
电动式工程机械中，当蓄电装置的蓄电剩余量少时，抑制当向自动怠速控制转移时的蓄电剩余量的减少，长时间保持蓄电装置的蓄电剩余量。为此，控制器(31)在多个操作装置(20、21、22、23a、23b、24)均没有被操作且经过了规定时间(TD)时，以使电动马达(1)的转速从规定转速降低至怠速转速(Ni)的方式控制电动马达(1)的转速。另外，当蓄电装置(33)的蓄电剩余量为第1阈值(Ea)以下时，与蓄电剩余量比第1阈值(Ea)多时相比，将规定时间(TD)设定得短。
Drive system for electric construction machine
电动式工程机械的驱动系统
MORI KAZUSHIGE (author) / TAKAHASHI KIWAMU (author) / INOUE RYOYA (author) / KOTO YUKI (author)
2024-05-03
Patent
Electronic Resource
Chinese
IPC:
E02F
Baggern
,
DREDGING