MATLAB Model of SPWM for AC Motor Control

This article presents a MATLAB model of Sinusoidal Pulse Width Modulation (SPWM) ideal for beginners learning motor control techniques. The model demonstrates how to regulate voltage and frequency for AC motors, which are essential components in modern industrial applications. Understanding their control mechanisms is crucial for electrical engineering students and practitioners. The implementation includes MATLAB code for generating sinusoidal reference signals and triangular carrier waves, with comparison logic that creates PWM pulses. Key functions like sine wave generation using sin() function, carrier creation with sawtooth() or custom algorithms, and logical comparison operations form the core of this SPWM implementation. Through this model, beginners can gain practical insights into SPWM control principles while learning MATLAB simulation techniques for power electronics. The simulation approach helps visualize modulation indices, harmonic analysis, and motor behavior under different switching frequencies. By studying this model, learners can deepen their understanding of AC motor operation principles and control methodologies, thereby building stronger foundational knowledge in this domain through hands-on coding experience.