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The Development of Small Size Ultra-High Speed Drive System

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 used not only the motor model from FEM but also the drive and control system models in the circuit simulation. This paper explains the ultra-high speed drive system including improved control method and presents experimental results using redesigned motor, and we illustrate the confirming availability of the total drive system model created by using VHDL-AMS and C-language as well.