This paper proposes a modulation technique for fault-tolerant cascaded H-bridge multileve linverters. The proposed modulation
scheme comprises two types of PWM strategy to cover both open-and short-device fault cases. The neutral shift is applied as
fault-tolerant control with the proposed modulation scheme. Finally, three-phase balanced line-to-line voltages and line currents
are produced under the internal faulty condition. In addition, a novel switching rotation scheme is proposed to improve power
distribution among the H-bridge inverter cells under the faulty conditions. Simulation and experimental results are included to
show the feasibility on the proposed fault-tolerant methods in the field.
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