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    • 5. 发明公开
    • ROTATION CONTROL DEVICE OF WORKING MACHINE
    • DREHUNGSSTUUORORRICHUNGUNGFÜREINE ARBEITSMASCHINE
    • EP2666914A4
    • 2017-04-19
    • EP12736462
    • 2012-01-19
    • HITACHI CONSTRUCTION MACH CO
    • UDAGAWA TSUTOMUSONODA MITSUOEDAMURA MANABUHIROKI TAKENORISUGIURA MANABUSATAKE HIDETOSHI
    • E02F9/20E02F9/12
    • E02F9/123E02F9/2095
    • To automatically prevent a reverse movement by inhibiting an excessive increase in an output torque of an electric motor. A means (31) calculates a target value for a rotation speed based on a command from a system (20), a means (32) calculates a deviation between a detection value from a rotation speed sensor (81) and the target value, a means (33) calculates a first target torque in a direction that the deviation will be eliminated, and a means (34) calculates, based on a command from the system (20), a second target torque in the same direction as the target value. A means (50) calculates a variation in a rotation angle of an electric motor (12) in a first range, and a means (60) calculates the same variation in a second range. A means (40) calculates, based on the variations from the means (50, 60), a third target torque in a direction that the rotation angle will return to a rotation angle before a predetermined time (t), and a means (73) limits the first target torque to one of the second and third target torques, said one target torque being in the same direction as the first target torque and being greater in absolute value. Substantially an entirety of the first range specifies a range for the variation in one direction, a remaining small range specifies a range for the variation in the other direction, substantially an entirety of the second range specifies a range for the variation in the other direction, and a remaining small range specifies a range for the variation in the one direction.
    • 通过抑制电动机的输出转矩的过度增加来自动防止反向运动。 装置(31)基于来自系统(20)的指令计算转速目标值,装置(32)计算来自转速传感器(81)的检测值与目标值之间的偏差,a 装置(33)计算在偏离将被消除的方向上的第一目标转矩,并且装置(34)基于来自系统(20)的命令计算在与目标值相同的方向上的第二目标转矩 。 装置(50)计算电动机(12)的旋转角度在第一范围内的变化,并且装​​置(60)计算第二范围内的相同变化。 装置(40)基于来自装置(50,60)的变化计算在预定时间(t)之前旋转角度将返回到旋转角度的方向上的第三目标扭矩,以及装置 )将第一目标扭矩限制为第二目标扭矩和第三目标扭矩中的一个,所述一个目标扭矩与第一目标扭矩处于相同的方向并且绝对值更大。 基本上整个第一范围指定一个方向上的变化的范围,其余的小范围指定另一方向上的变化的范围,基本上整个第二范围指定另一个方向上的变化的范围, 并且剩余的小范围指定一个方向上的变化的范围。