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In this paper, a superconducting augmented rail-type electromagnetic launch system (SAREML) is proposed due to its inherent advantages in terms of lower current, smaller rail ablation, higher propulsive force, and higher energy efficiency. A superconducting coil to enhance the magnetic field was designed and analyzed. The inductance was calculated using the finite element method. Then, the mathematic...
This paper proposes a ring model with air-gap to evaluate iron loss of steel sheet under sinusoidal and non-sinusoidal pulsed width modulation excitation with high harmonic content. B-H curves are measured under both DC and AC conditions. Iron loss is analyzed with varied frequency and flux density, then compared with Epstein model. The evaluation of iron losses with constant B peak value under non-sinusoidal...
As wind turbines increase their power rating, the size and mass grows as well. The higher reliability is demanded in order to minimize the maintenance. Permanent magnet direct drive (PMDD) synchronous generators are a good solution since they omit the gearbox. While the large generator mass has been also a key difficult problem limiting the practical use of PMDD generator, which makes them difficult...
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