A detailed comparative analysis of sawtooth and triangular carrier pulse-width modulation (PWM) techniques for buck chopper systems is presented in this study. The research addresses the need for empirical performance evaluation in motor control applications by systematically examining critical operational parameters, including speed regulation, torque stability, and current dynamics. MATLAB/Simulink is employed for system modeling and simulation, while real-time validation is conducted using RTLAB to ensure practical applicability. The results demonstrate that both techniques achieve fast dynamic response, with overshoot limited to less than $\mathbf{1 6} \boldsymbol{\%}$ and settling time maintained below 0.2 seconds during speed transitions. However, distinct performance characteristics are observed. Superior steady-state performance is exhibited by the sawtooth carrier method, with current oscillations reduced by approximately 30% and torque ripple lowered by 25% compared to the triangular approach, making it particularly suitable for precision applications. In contrast, marginally faster transient response is provided by the triangular carrier, though higher electromagnetic interference is generated due to more pronounced current fluctuations. These findings offer clear selection criteria for engineers based on application priorities, whether for high-precision systems requiring smooth operation or scenarios where rapid response is prioritized. The study contributes to power electronics optimization by establishing validated performance benchmarks and practical implementation guidelines for buck chopper control strategies.

This study investigates the performance of bipolar and unipolar control methods for single-phase asynchronous motors. Using MATLAB's SimPower System for modeling and RTLAB for validation, the study highlights significant findings. Unipolar control demonstrated a 20.23% reduction in total harmonic distortion (THD) compared to bipolar control, resulting in improved current waveform quality and enhanced torque response. Bipolar control, while less complex to implement, exhibited higher THD and marginally slower dynamic response. These findings provide actionable insights for optimizing motor control systems in various industrial and domestic applications.