Online Failure Diagnostic in Full-Bridge Module for Optimum Setup of an IGBT-Based Multilevel Inverter

Juan Carlos Iglesias-Rojas, Erick Velázquez-Lozada and Roberto Baca-Arroyo
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Juan Carlos Iglesias-Rojas: Instituto Politécnico Nacional—ESIME Zacatenco, Unidad Profesional Adolfo López Mateos, Alcaldía Gustavo A. Madero, Mexico City 07738, Mexico
Erick Velázquez-Lozada: Instituto Politécnico Nacional—ESIME Zacatenco, Unidad Profesional Adolfo López Mateos, Alcaldía Gustavo A. Madero, Mexico City 07738, Mexico
Roberto Baca-Arroyo: Instituto Politécnico Nacional—ESIME Zacatenco, Unidad Profesional Adolfo López Mateos, Alcaldía Gustavo A. Madero, Mexico City 07738, Mexico

Energies, 2022, vol. 15, issue 14, 1-14

Abstract: An online failure diagnostic test is essential to ensure the robustness and reliability of high-powered systems. Furthermore, the overall design must comprise diagnostic strategies to detect in-service and high-powered module defects. This paper describes the critical failure mechanisms––cross-conduction, inductive avalanche, second turn-on, VS-undershoot, inrush current, and thermal runaway––that directly affect insulated gate bipolar transistor (IGBT) operation. The constructed inverter contains 18 transformer-based taps (six per phase); however, this work studied a single tap (IGBT-based full-bridge module) to understand the reasons for failure and the routes to mitigate them. Moreover, a cost-effective solution using the IR2127STRPBF driver circuit was implemented to reduce the probability of thermal runaway in case of overcurrent, short-circuit, or avalanche events. For this reason, the electrical current state was adjusted using an FPGA digital resource to perform dynamic PWM control signals. The obtained correlation waveforms are valuable for verifying diagnostic data at the design stage to emphasize the significance of evading premature failure events. The comprehensive study on failure diagnosis enabled successful design strategies to construct a robust 45 kVA three-phase multilevel inverter for a 22 kW eolic-photovoltaic generation plant.

Keywords: critical failures mechanisms; low-frequency transformers; IGBT devices; on-line diagnostic method; isolated multilevel inverter (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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