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Related Experiment Video

Updated: May 28, 2026

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump

Published on: June 1, 2022

An opto-isolator based linearization technique of a typical thyristor driven pump.

S C Bera¹, R Sarkar, N Mandal

¹Instrumentation Engineering, Department of Applied Physics, University of Calcutta, 92 A.P.C Road, Kolkata-700009, India. scb152@indiatimes.com

ISA Transactions

|October 11, 2011

Summary

This study introduces an opto-isolator technique to linearize thyristor driven pumps, overcoming nonlinear control issues. Experimental results confirm significantly improved linearity for better pump operation.

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Area of Science:

Electrical Engineering
Control Systems
Power Electronics

Background:

Thyristor driven pumps exhibit nonlinear control characteristics due to the relationship between thyristor output and DC input.
This nonlinearity complicates precise operation and control of these pump systems.

Purpose of the Study:

To propose and validate an opto-isolator based linearization technique for thyristor driven pumps.
To address the inherent nonlinearities in thyristor drive control for improved pump performance.

Main Methods:

Design and fabrication of an opto-isolator based circuit for linearization.
Theoretical explanation of the proposed linearization technique and its expected output.
Experimental investigation of the thyristor driven pump before and after linearization.

Main Results:

The proposed opto-isolator technique successfully linearizes the thyristor driven pump operation.
Experimental data demonstrates a significant improvement in the linearity of the pump's characteristic graphs.
The fabricated circuit and theoretical model align with experimental observations.

Conclusions:

The opto-isolator based linearization technique is effective in overcoming the nonlinear control issues of thyristor driven pumps.
This method offers a practical solution for achieving linear and precise control in thyristor driven pump applications.
The study provides a validated approach for enhancing the performance and controllability of thyristor based systems.