Abstract
This paper presents the pre and postfault stator current control structures for symmetrical dual three-phase reluctance synchronous machines (SDT-RSMs) with different neutral-point configurations. The effect of winding chording and rotor saliency on the space harmonic mapping among different subspaces is investigated. This proves on one hand that the control structure in the prefault case can be simplified; on the other hand, it shows that the derived harmonic mapping in the literature is insufficient to ensure high-performance operation in the postfault operation. Moreover, the machine nonlinearities are identified, through which the maximum-torque-per-ampere loci are obtained and employed in the pre and postfault cases. The theoretical findings are corroborated with finite-element simulations and experimental validations on a 3-kW SDT-RSM prototype.
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