Record breaking drilling machine can make over 1 million revolutions per minuteNovember 15th, 2008 - 12:34 pm ICT by ANI
Washington, Nov 15 (ANI): Researchers from ETH Zurichs Department of Power Electronics have developed a drilling machine that can achieve over one million rpm (revolutions per minute), which is a new world record.
Up to now, industrially deployed motors have normally reached 250,000 revolutions per minute.
But, the drive system developed by ETH Zurich, in cooperation with its industrial partners, can achieve over 1,000,000 rpm.
The new drive system generates an output of 100 watts and is barely bigger than a matchbox. The rotor construction has a titanium shell that is able to withstand extreme centrifugal forces and the ball bearings are optimized for extremely high speeds.
Until now, it has been the case that the higher the rotational speed, the more losses there are.
But, the researchers from ETH Zurich have now managed to solve the problem with an especially low-loss stator.
Ultra-thin copper wire is used for the windings that are inserted in a cylinder made of special iron previously unused for machines.
In addition, the machine is fed by electronics specifically designed for such engine speeds.
Our aim of breaking the million barrier was clear but the breakthrough was only possible thanks to the new technology, explained Christof Zwyssig, a post-graduate student from the Department of Power Electronics at ETH Zurich.
The drive system was brought to fruition in collaboration with industry.
The machine was manufactured by the German company, ATE GmbH, which specializes in the development of highly efficient electrical drives.
The ball bearings came from the company, myonic, which is also based in Germany and has been manufacturing high precision miniature ball bearings for over 70 years.
The construction of the whole system, the development of the electronics and the regulation of the drive system, however, was developed at ETH Zurichs Department of Power Electronics. (ANI)
Tags: centrifugal forces, copper wire, drilling machine, electrical drives, eth zurich, fruition, german company, high speeds, industrial partners, matchbox, miniature ball bearings, myonic, new world record, post graduate, power electronics, revolutions per minute, rotational speed, stator, titanium shell, windings