Simulink Analysis and Mathematical Modeling of Parameters Variation for Thyristor Based Speed Controller of Single Phase Induction Motor

Muhammad Shahzad Bajwa; Muhammad Usman  Keerio; Noor Hussain  Mugheri; Rameez Akbar  Talani; Rizwan Aziz  Siddiqui; Riaz Hussain Memon

Authors

Muhammad Shahzad Bajwa Quaid-e-Azam University of Engineering, Science and Technology Nawabshah
Muhammad Usman Keerio Quaid-e-Azam University of Engineering, Science and Technology Nawabshah
Noor Hussain Mugheri Quaid-e-Azam University of Engineering, Science and Technology Nawabshah
Rameez Akbar Talani Quaid-e-Azam University of Engineering, Science and Technology Nawabshah
Rizwan Aziz Siddiqui Quaid-e-Azam University of Engineering, Science and Technology Nawabshah
Riaz Hussain Memon Quaid-e-Azam University of Engineering, Science and Technology Nawabshah

Keywords:

AC-AC Voltage controller, Firing angle control, Capacitor start induction motor, Speed, Power factor, Total Harmonic Distortion

Abstract

The thyristor is a power electronics device that is widely used in various electrical appliances due to its lower on-conduction losses, easyavailability, lower switching loss, greater efficiency and cost-benefit. Mostly a thyristor is used in rectifiers and variable-speed drives. Almost 70% of loads used in the world consists of induction motors in various types and forms. In this work, a thyristor-based controller is used to control the speed of a single phase induction motor by adjusting the firing angle for the gate terminal of the thyristor. Depending upon the firing angle, the output voltage, output current, speed, power factor and the total harmonic distortion are varied which is analyzed through MATLAB/Simulink. Further curve fitting technique is used to formulate the mathematical relationships between varying parameters concerning thyristor’s firing angle. The findings of this work are helpful to achieve the best curve fit model for varying parameters concerningthe thyristor firing angle.

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