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Recently, a permanent magnet type synchronous motor (PMSM) has been widely used. The PMSM cannot start without an inverter. The authors have proposed in a previous paper a novel self-start type PMSM which moves as induction motor at asynchronous speed region and moves as synchronous motor at synchronous speed. It was surface type PMSM and had relatively large area squirrel-cage region. This paper...
A trial small size and ultra-high speed motor drive system of 5kW and 240,000rpm is designed and built. And we had described our prototype drive system and some experimental results in previous papers. For evaluating the motor drive system, we also are working on an electric and magnetic coupled-analysis in which we use not only the motor model from FEM but also the drive and control system models...
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...
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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