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A fault detection (FD) algorithm for multiple device open circuit fault (OCF) in neutral-point-clamped(NPC) inverter is proposed in this paper. The present algorithm is based on the average current park vector (ACPV) method. The FD circuit proposed is independent of the load, only the three-phase output current of the converter is needed. The efficiency of this method has already been verified for...
The demand for more reliable power conversion is ever increasing. This necessitates smart gate drivers or smart system controllers that monitor the components that are susceptible to failure. Together with the electrolytic capacitors, power semiconductor devices are among the weakest components in a power converter. In an effort to predict power MOSFET aging, this paper proposes an remaining useful...
The battery banks in many battery storage systems, such as uninterruptible power supply (UPS) systems, are placed in unattended or remote locations. Operators have to conduct regular on-site visual inspection of the service condition of the batteries. Unexpected premature battery failure cannot be discovered easily and accurately. To ensure serviceability, those batteries are typically replaced after...
Switch fault diagnosis is an important design criterion for dc-dc converters, as it can improve system reliability, prevent converter damage, and production losses to end users. This paper proposes a short circuit fault (SCF) diagnosis method for interleaved dc-dc converters that can detect the fault and identify the faulty switch in less than one switching cycle. The dc-link current is utilized as...
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