This paper presents a fault identification and tolerant method for switched reluctance motor (SRM) drives. The reliability of a power
transistor in a power converter is the source of most problems in several industrial applications. It is critical to correctly diagnosis
the faults occurring in a drive system to avoid harmful accidents and to ensure continuity of operation. In this paper, two types of
faults, namely, short- and open-circuit faults, are analyzed on the basis of the current patterns of the power transistors of SRM drives.
A fault is detected when the measured amplitude of the current differs from that of the normal-state current. A fault-tolerant scheme
is applied according to the type of fault. Simulations and experiments are performed on a 1.0-kW SRM drive. The results are
presented to verify the validity of the proposed method.
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