Two-transistor step-down DC/DC converters with fault-tolerant capability

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Conference Proceeding
2014 Australasian Universities Power Engineering Conference, AUPEC 2014 - Proceedings, 2014
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© 2014 ACPE. This paper presents a family of two-transistor step-down dc/dc converters with fault-tolerant capability which is derived through graph theoretic approach. The fault-tolerant property deals with open-circuit fault of one of the power transistors in a two-transistor dc/dc converter structure. Under normal operation, either one of the two transistors can be used to control the power flow and the other transistor is idle. When the fault occurs, the other transistor will be activated to provide an alternate current path to continue converter operation and maintain output regulation. Derivation procedure and some experimental results are reported.
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