Fault Tolerance Performance Of Two Hybrid Six-phase Drive Systems Under Single-phase Open-circuit Fault Operation

Fault Tolerance Performance of Two Hybrid Six-Phase Drive Systems Under Single-Phase Open-Circuit Fault Operation.

Abstract—

            This paper discusses the fault tolerance performance of two hybrid six-phase drive systems under single-phase open-circuit fault. The topologies are considered to be hybrid because each of the two three-phase groups of the six-phase machine is connected to a different type of converter. One group is connected to a two-level converter and the other group is connected to a dual converter in an open-end arrangement. A compensation strategy is discussed in order to keep the rated operation even after the occurrence of the fault. The six-phase machine mathematical model after the fault is presented and utilized to elaborate the compensation strategy.