Improved Performance DC Motor Control Using A Unipolar Switching Scheme

Liza, Ahamat Mahmod (2012) Improved Performance DC Motor Control Using A Unipolar Switching Scheme. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This report presents the improvement performance of DC motor drive in terms of torque ripple, dynamic control and switching frequency. These motor drive is very essential for industrial applications. To improve performance of motor drive, precise control for some variable such as current (or torque), speed and position are necessary. The overall system is simulated using Matlab where the different switching techniques operation, output current and voltage are presented. The performance of three control switching technique which are bipolar-hysteresis, bipolar-triangular and unipolar-triangular are analyzed and discussed. Each switching technique for controlling the armature current (or torque) of DC machine was implemented using ezdsp F28335, with sampling period at 50us. The improvements of unipolar switching technique (i.e. minimization of torque ripple and provide constant switching frequency) compared the other switching techniques can be verified through simulation and experimentation.

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