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公开(公告)号：US5416397A
公开(公告)日：1995-05-16
申请号：US130821
申请日：1993-10-04
摘要： A control system that increases apparent linear motor stiffness and faster frequency for a digital electronic drive of one or more brushless DC linear motors. It comprises a position transducer providing an analog electrical signal indicative of the linear position of a movable part of the linear motor and being induced from an electrical signal supplied to or derived from the motor field winding; a converter for changing the analog signal to an acceleration feedback signal; a processor for providing a position error electrical signal derived by computing the difference between the actual position feedback signal and a position reference signal; and a processor for providing a velocity error electrical signal derived from the difference between the first derivative of the position error electrical signal and the actual velocity feedback signal to produce a velocity command signal, and for providing an acceleration error electrical signal derived from the difference between the second derivative of the position feedback signal and the actual acceleration feedback signal to produce a motor command signal to the field winding of the motor. A method of using such control system comprises providing a positioning apparatus having stacked movable members interconnected by linear motors to promote three-axis movement of a ram acting as the last of said movable members and carrying out the functions of the control for each linear motor.
摘要翻译： 一种用于一个或多个无刷直流直线电动机的数字电子驱动器的视觉线性电机刚度和更快频率的控制系统。 它包括位置传感器，其提供指示线性电动机的可移动部分的线性位置的模拟电信号，并且由提供给或从电动机励磁绕组获得的电信号感应; 用于将模拟信号改变为加速度反馈信号的转换器; 处理器，用于提供通过计算实际位置反馈信号和位置参考信号之间的差导出的位置误差电信号; 以及处理器，用于提供从所述位置误差电信号的一阶导数与所述实际速度反馈信号之间的差导出的速度误差电信号，以产生速度指令信号，并且用于提供从所述速度误差电信号得到的加速度误差电信号， 位置反馈信号的二阶导数和实际加速度反馈信号，以产生电机的励磁绕组的电机指令信号。 使用这种控制系统的方法包括提供一种定位装置，该定位装置具有通过直线电动机互连的堆叠的可移动部件，以促进作为最后一个所述可移动部件的冲头的三轴运动，并且执行每个线性马达的控制功能。
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