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The route to 30 T NMR endorsed by a recent National Academy report <xref ref-type="bibr" rid="ref1">[1]</xref> clearly still has many challenges to achieve a high stability and a homogeneous high-temperature superconducting (HTS) insert magnetic field. As the only HTS conductor with round wire (RW) geometry, Bi2Sr2CaCu2 O8-x (Bi-2212) RW conductor is very attractive...
Due to high torque density, low torque ripple, high efficiency, excellent fault-tolerance capability and convenient manufacturing, fraction-slot concentrated windings (FSCWs) are desirable to be used in high performance permanent magnet (PM) synchronous machines.
Vernier Permanent-magnet machine (VPMM) has been recognized in recent years as a substitute for permanent magnet synchronous machines (PMSM) in direct-drive applications such as wind turbine generators, motorcycles and electric vehicle/hybrid electric vehicle (EV/HEV) [1].
Since vernier permanent-magnet machine (VPMM) has the merit of low-speed operation with high output torque due to the “magnetic-gearing” effect [1], they have been used in the direct-drive applications such as wind power generator, electric vehicle/hybrid electric vehicle (EV/HEV) [2,3].
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