T. Svedberg, who first trial motor - gear after the failure of growth of the program, using the program with a 150mm rotor diameter, speed up 18000r/min. At that time, high speed motor itself can not stand under the centrifugal force, so give up this program, then speed of the oil turbine-driven centrifuge, when they think that turbo is the best way to get high speed.

1940, JWBeams replaced with a motor drive speed air turbine centrifuge indirect air turbine. Fan motor is converted goods, high frequency, with a 152mm diameter rotor, within the 30min up to 60000r/min, need to 1600W, the air turbine-type structure is lower than that simple and easy to use, but requires variable frequency power supply, temperature rise, it is not practical .

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