Researchers from
ETH’s department of power electronics have developed a miniaturised high-speed electrical drive system capable of achieving over 1,000,000rpm.
Industrially deployed motors have only been able to reach an average of 250,000rpm. However, the
The matchbox-sized device uses ultra-thin copper wire for windings that are inserted in a cylinder made from a type of iron previously unused for machines. The ball bearings are optimised for high speeds and the rotor construction has a titanium shell that is able to withstand extreme centrifugal forces.
The machine was manufactured by ATE GmbH and the ball bearings developed by German company, myonics. ETH
Based on successful trials, Christof Zwyssug and Martin Batholet, both post-graduate students at ETH
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