Simulink Simulation of a Custom SPWM Inverter Implementation

In this article, I present a Simulink simulation of a custom-designed SPWM (Sinusoidal Pulse Width Modulation) inverter. The simulation process proved highly engaging, providing deep insights into the operational principles and control mechanisms of SPWM inverters. Through Simulink's block diagram environment, I modeled various inverter components including the DC power source, MOSFET/IGBT switches, LC filters, and the SPWM control system. The simulation implements key algorithms such as triangle carrier wave generation and sinusoidal reference comparison to create modulated gate signals. Using Simulink's Power Electronics toolbox, I configured precise switching parameters and control loops to optimize harmonic performance. The simulation framework allowed for real-time monitoring of output voltage waveforms, THD (Total Harmonic Distortion) analysis, and efficiency calculations. This modeling approach helped identify potential issues like switching losses, electromagnetic interference, and voltage distortion, while suggesting mitigation strategies through parameter tuning and filter optimization. The simulation employs critical functions including PWM generator blocks, voltage measurement subsystems, and FFT analysis tools to validate performance metrics. Overall, the Simulink platform served as an invaluable learning environment, enabling comprehensive understanding and practical application of SPWM inverter technology through systematic modeling and verification processes.