LOW-THD 110 V RMS, 60 HZ PI-REGULATED SINGLE-PHASE FULL-BRIDGE INVERTER WITH 10 KHZ SPWM AND LC FILTERING

Authors

  • Faqir Hussain Author

Keywords:

Closed-loop proportional–integral (PI) control, DC–AC conversion, High-frequency switching, LC output filter, Single-phase full-bridge inverter, Sinusoidal pulse-width modulation (SPWM), Total harmonic distortion (THD), Voltage regulation, Renewable energy systems, Uninterrupted power supplies (UPS)

Abstract

This study presents a single-phase full-bridge inverter converting DC to stable 110 V RMS, 60 Hz AC using 10 kHz sinusoidal PWM for precise control of IGBT switches. An LC low-pass filter (4.06 mH, 6.23 µF) significantly reduces harmonic distortion (THD ≈ 0.22%). A high-bandwidth PI controller dynamically adjusts PWM duty cycles to maintain output stability within ±2% despite load variations and DC-bus disturbances. The system demonstrates fast recovery and excellent dynamic response, making it suitable for high-quality AC power applications like renewable energy and UPS systems.

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Published

2024-12-31

Issue

Vol. 1 No. 1 (2024): International Journal of Engineering Research

Section

Articles