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Fault-Tolerant Electric Motors with Permanent Magnets and Electromagnetic Shunting

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The main contribution of the paper is the analysis of processes and the evaluation of the effectiveness of fault-tolerant PMEM with electro-magnetic winding shunting, including the winding shunt location on the back of the stator magnet guide. This paper presents studies of the electric motors with permanent magnets with turn-to-turn short circuits protection using an electromagnetic shunt. Studies are performed on a low-power electric generator, which is designed to generate electricity on an unmanned aerial vehicle. At the same time, in contrast to the well-known works, two installation sites of an electromagnetic shunt are considered: on the stator's back (this method has been not considered in the literature before). Then the electromagnetic wedge and the most efficient installation site of the electromagnetic shunt are selected. For this task, computer models and experimental samples for both variants are created, whose studies in various operating modes are also given in the paper. According to the research results, recommendations on the use of electromagnetic shunting in electric machines with permanent magnets have been developed.
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Fault-Tolerance; Electromagnetic Shunting; Turn-to-Turn Short-Circuits; Electric Motor; Permanent Magnet

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