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Due to higher magnetic flux density, larger effective magnetic air gap, and lesser use of ferromagnetic materials, large-scale direct-drive superconducting (SC) wind generators have a very high peak fault current and torque, which pose a challenge for their armature windings and mechanical supports. Understanding the behavior of the SC generators under faults is important for their application and...
The interior permanent magnet (IPM) machine with fractional-slot concentrated-windings (FSCW) has become a popular research topic owing to their novel structures and attracting potentials. This paper is focused on inductances and saliency ratios in IPM FSCW machines with different pole and slot combinations. Analytical expressions of inductances and saliency ratios are derived using harmonic analysis...
To help machine designers to design large permanent magnet (PM) machines to be more accurate, this paper presents a set of design considerations that are very often ignored by machine designers. These considerations are categorized into several aspects: electromagnetic (EM) performance, losses and efficiency, fault and stability, and some other issues. The effects of various practical factors are...
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