Space vector control for optimized device commutations in controlled diode bridge clamped-based impedance source inverter

This article proposes a space vector-based Pulse Width Modulation (PWM) technique for a modified T-Type inverter configuration. The modification involves incorporating a bidirectional switch to achieve zero pole voltage, distinguishing it from conventional T-Type inverters. The proposed PWM technique is designed using a space vector approach, which optimizes the switching transitions within each switching cycle. Implemented under the Maximum Constant Boost Control (MCBC) framework, the method demonstrates significant advantages in impedance source inverters (ZSI), including automatic balancing of DC link capacitor voltages. The dependency of the modulation index on average switching frequency has also been analyzed, highlighting its influence on performance. To minimize output harmonics, the technique utilizes adjacent three-vectors to construct the reference vector effectively. Extensive simulations and experimental validations confirm the feasibility and efficiency of the proposed technique. Results indicate reduced harmonic distortion, enhanced efficiency, and improved voltage balancing, making it suitable for renewable energy and industrial power electronics applications. These findings demonstrate the practicality and advantages of the proposed modulation technique in achieving superior inverter performance compared to conventional approaches.