Fault-Tolerant Switched-Capacitor Multilevel Inverter With Harmonic Suppression for Critical Power Applications

作者：Ankit Singh, Vibhu Jately, Peeyush Kala, Yongheng Yang · 发表于：IEEE Transactions on Aerospace and Electronic Systems · 年份：2025 · DOI：10.1109/taes.2025.3617027 · 被引用次数：4 · 研究领域：Multilevel Inverters and Converters、Microgrid Control and Optimization、Induction Heating and Inverter Technology

A compact single-phase switched-capacitor multilevel inverter (SCMLI) for critical aerospace power applications is presented in this correspondence. The proposed 9-level configuration has a low component count with a single-input DC source, two capacitors, nine switches, and one diode, and has a capacitor self-balancing feature. A SHEPWM strategy is improved to minimize dominant harmonics and to achieve a THD of ∼8% for the 9-level unit, par with state-of-the-art compact SCMLIs. Three such 9-level units are cascaded to realise a 25-level SCMLI that meets the stringent aerospace limits of THD. Demonstration of THD 1.6% under normal operations and 3.6% under worst-case fault conditions during experimental validation, establishes that the proposed modular structure fully complies with MIL-STD-704F and RTCA DO-160G aerospace standards. Further a balanced operation and high power quality of the designed structure in hardware tests at aircraft's operating frequency of 400 Hz confirm its efficacy as a compact, fault-tolerant, and standards-compliant inverter topology for aerospace power systems.