Instrumentation Engineering, Department of Applied Physics, University of Calcutta, 92 A.P.C Road, Kolkata-700009, India.
ISA Trans. 2011 Jul;50(3):496-503. doi: 10.1016/j.isatra.2011.03.006. Epub 2011 Apr 13.
In the present paper, design of a flow control loop using a thyristor driven pump as final control element has been described. In this technique, the load current of a thyristor driven pump motor has been utilized as a mass flow sensing parameter of a fluid passing through a pipeline. This thyristor driven pump has been utilized as a final control element of a flow control loop and the speed of the pump has been selected as the manipulated variable. The non-linearity between the thyristor input signal and pump output has been eliminated by using a modified PID control technique with inverse derivative control action. Thus without using any conventional flow meter and control valve only the thyristor driven pump has been utilized both as the final control element and flow indicating device by using the proposed technique. The whole system has been designed, fabricated and tested by using tap water as the flowing liquid through a pipe line. The experimental results along with the theoretical analysis are compared and reported in the paper.
在本文中，描述了一种使用晶闸管驱动泵作为最终控制元件的流量控制回路的设计。在该技术中，利用晶闸管驱动泵电动机的负载电流作为通过管道的流体的质量流量感测参数。该晶闸管驱动泵用作流量控制回路的最终控制元件，并且泵的速度被选择为操纵变量。通过使用具有逆微分控制作用的改进 PID 控制技术，消除了晶闸管输入信号和泵输出之间的非线性。因此，无需使用任何传统的流量计和控制阀，仅使用晶闸管驱动泵，通过使用所提出的技术，将其用作最终控制元件和流量指示装置。整个系统已使用自来水作为流经管道的流动液体进行了设计、制造和测试。本文比较并报告了实验结果和理论分析。
