This paper presents a unique design for flying capacitor type multilevel inverters with fault-tolerant features. When a single-switch fault per phase occurs, the new design can still provide the same number of converting levels by shorting the fault power semiconductors and reconfiguring the gate controls. The most attractive point of the proposed design is that it can undertake the single-switch fault per phase without scarifying power converting quality. This paper also discusses the capacitor balancing approach under fault-conditions, which is an essential part of controlling flying capacitor type multilevel inverters. Suggested fault diagnosing methods are also discussed in this paper. Computer simulation and lab results validate the proposed controls.

Meeting Name

IEEE International Electric Machines and Drives Conference, 2003. IEMDC'03


Electrical and Computer Engineering

Keywords and Phrases

375 V; 60 Hz; Capacitor Balancing Approach; Capacitors; Computer Simulation; Fault Diagnosing Methods; Fault Diagnosis; Fault Location; Fault Power Semiconductors Shorting; Fault Tolerance; Fault-Tolerant Design; Flying Capacitor Multilevel Inverters; Flying Capacitor Type Multilevel Inverters; Gate Controls Reconfiguration; Invertors; Power Converting Quality; Power Semiconductor Devices; Single-Switch Fault Per Phase

International Standard Book Number (ISBN)


Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 2003 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jan 2003