公开(公告)号：US20210262198A1

公开(公告)日：2021-08-26

申请号：US17255185

申请日：2019-03-28

申请人： Hitachi Construction Machinery Co., Ltd.

发明人： Hiroshi UTASHIRO ,  Akinori KAMIYA ,  Noritaka ITO ,  Takatoshi OOKI ,  Satoshi SEKINO

IPC分类号： E02F9/20 ,  B60K6/46 ,  B60W10/06 ,  B60W10/08 ,  B60W10/198 ,  B60W10/30 ,  B60W20/14 ,  B60L50/61

摘要： To provide a technique for reliably acquiring a required braking power during travel and for efficiently using a regenerative power generated during braking. A work vehicle calculates a regenerative power outputted from an electric motor and a target hydraulic driving power for driving a hydraulic pump, supplies the regenerative power to the generator motor operating as a motor and makes the generator motor consume the regenerative power in a case where the regenerative power is equal to or smaller than the target hydraulic driving power, and supplies the regenerative power to the generator motor operating as the motor and makes an exhaust brake consume a power equivalent to a difference between the regenerative power and the target hydraulic driving power in a case where the regenerative power is larger than the target hydraulic driving power.

公开(公告)号：US20170001539A1

公开(公告)日：2017-01-05

申请号：US15265934

申请日：2016-09-15

申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.

发明人： Yuichiro MORITA ,  Shigeyuki YOSHIHARA ,  Kazuo ISHIDA ,  Noritaka ITO ,  Hirofumi SHIMADA

IPC分类号： B60L15/08 ,  B60L3/04

CPC分类号： B60L15/08 ,  B60L3/0023 ,  B60L3/0084 ,  B60L3/04 ,  B60L11/005 ,  B60L11/08 ,  B60L15/2009 ,  B60L2200/40 ,  B60L2210/40 ,  B60L2240/30 ,  B60L2240/80 ,  B60T7/02 ,  B60T7/12 ,  B60T8/885 ,  E02F9/207 ,  H02P27/08 ,  Y02T10/70 ,  Y02T10/7022 ,  Y02T10/7077 ,  Y02T10/7241 ,  Y02T10/7258 ,  Y10S903/906

摘要： An electric driving wheel type work vehicle has a traveling motor, an inverter for supplying the motor with three-phase power converted from DC power, a pre-driver circuit for supplying a gate signal to the inverter on the basis of an input PWM signal, a controller for outputting to the pre-driver circuit the PWM signal for controlling the driving of the motor, a parking brake, and a parking brake condition detector that detects the condition of the parking brake. When it is detected that the parking brake has been operated, the pre-driver circuit cuts off the output of the gate signal or the input of the PWM signal to the pre-driver circuit.

摘要翻译： 电动驱动轮型作业车具有行驶马达，用于向马达提供从直流电源转换的三相电力的逆变器，用于根据输入的PWM信号向逆变器提供门信号的预驱动电路， 用于向前驱动电路输出用于控制电动机的驱动的PWM信号，驻车制动器和检测驻车制动器的状态的驻车制动状况检测器的控制器。 当检测到驻车制动器被操作时，预驱动器电路将门信号的输出或PWM信号的输入切断到预驱动器电路。