MATLAB Simulation of Three-Phase PWM Inverter Using Universal Bridge and IGBT

In this article, I will demonstrate how to simulate a three-phase PWM inverter using a Universal Bridge and IGBT components. This power electronic device finds widespread applications in industrial, commercial, and residential sectors. The PWM inverter converts DC power to AC power with the significant advantage of controlling output voltage and frequency, enabling precise load management. The implementation involves creating a MATLAB/Simulink model with key components: the Universal Bridge block configured for three-phase operation, IGBT/diode pairs as switching elements, and PWM generation using carrier comparison techniques. The simulation includes proper gate driver circuits, DC link capacitor sizing calculations, and output LC filter design to minimize harmonic distortion. Critical implementation aspects include: - PWM signal generation using sinusoidal pulse width modulation (SPWM) algorithm - IGBT switching characteristics modeling with turn-on/off times and snubber circuits - Universal Bridge configuration parameters for proper phase sequencing - Closed-loop control implementation for voltage and frequency regulation - THD (Total Harmonic Distortion) analysis using FFT algorithms The article provides detailed guidance on selecting appropriate IGBT ratings based on voltage/current requirements, thermal considerations, and switching frequency optimization. The Universal Bridge configuration allows flexible topology adaptation for different power levels and control strategies.