Reliability Improvement by Fault-Tolerant Operation of NPC Inverter for Motor Driving

Savastianov, Mikhail; Smedley, Keyue

doi:10.1109/tpel.2023.3265642

Reliability Improvement by Fault-Tolerant Operation of NPC Inverter for Motor Driving

Journal Article · Tue Apr 11 00:00:00 EDT 2023 · IEEE Transactions on Power Electronics

DOI:https://doi.org/10.1109/tpel.2023.3265642· OSTI ID:2397344

^[1]; Smedley, Keyue ^[2]

University of California, Irvine, CA (United States); University of California, Irvine
University of California, Irvine, CA (United States)

The high-reliability operation of three-level inverters is crucial to prevent equipment damage, process downtime, and economic losses. This article investigates a three-level neutral-point-clamped inverter under all possible combinations of open-circuit and short-circuit faults and proposes a new postfault operation method without adding extra hardware. This method provides comprehensive solution for operations after single and multiple-device failures, increasing the inverter reliability by 24%. This article classified postfault modulations and uncovered previously unknown fault scenarios that can be addressed using the proposed control method. A new postfault modulation based on space vector modulation with virtual vectors is proposed. The feasibility of the proposed control method is verified by simulation and an experiment for one fault scenario in a three-level neutral-point-clamped inverter with a 3.73 kW motor load. Furthermore, this article contributes to improving the reliability of three-level inverters.

View Accepted Manuscript (DOE)

Research Organization:: University of Oklahoma, Norman, OK (United States); University of California, Irvine, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: EE0008772

OSTI ID:: 2397344

Journal Information:: IEEE Transactions on Power Electronics, Journal Name: IEEE Transactions on Power Electronics Journal Issue: 7 Vol. 38; ISSN 0885-8993

Publisher:: IEEECopyright Statement

Country of Publication:: United States

Language:: English

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Neutral-point-clamped inverter
postfault operation
reliability
space vector modulation

Reliability Improvement by Fault-Tolerant Operation of NPC Inverter for Motor Driving

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