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We designed and built a trial small size and ultra-high speed motor of 2 poles, 5kW and 240,000rpm as the target. And we had described our prototype ultra-high speed drive system and some experimental results in previous papers. But the evaluation of this kind of motor drive system is difficult only by the experiments. Then we also had described the electric and magnetic coupled analysis which was...
In order to study the thermal stability of an antiferromagnetically coupled medium and a keepered one with a soft magnetic underlayer, a finite element read/write simulation based on the Poisson equation is performed on the 2D model of the medium and a thin film head system. The model used for the recording layer is a Stoner-Wohlfarth model extended at finite temperatures. As a result, it is found...
Recent developments of power electronics technology, low-loss iron core materials and highly efficient permanent magnet, etc have made it possible to realize a small size, high or ultra-high speed, and high performance electrical drive system. We designed and built a trial ultra-high speed drive system of 2 poles, 5 kW, 240,000 rpm and had described our prototype system and showed some experimental...
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