Mikhail Osipovich Dolivo-Dobrovolsky (1862 to 1919) was a Russian-born engineer, electrician and inventor of Polish-Russian origins who was active in the German Empire and in Switzerland. After studying at the Technische Hochschule Darmstadt and joining Allgemeine Elektricitäts-Gesellschaft (AEG) in Berlin in 1887, he became one of the founders of polyphase electrical systems, developing a three-phase generator and a three-phase electrical motor in 1888. In 1891 he created a three-phase transformer and the short-circuited, or squirrel-cage, induction motor, and he used the three-phase system to transmit power over 176 km at 75 percent efficiency at the 1891 International Electro-Technical Exhibition. He designed the first three-phase hydroelectric power plant in 1891, invented the phase meter in 1892 and the ferrodynamic wattmeter in 1909, became Swiss in 1906, and obtained over 60 patents.
Facts
Defining ContributionDeveloped three-phase electrical systems, using three currents rather than two to significantly increase motor output 2 Connections
Invented
Source Induction motor (Wikipedia)
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Also in Geography Atlas: the nationality of this subject.
Source Mikhail Dolivo-Dobrovolsky (Wikipedia)Lead, nationalityQuote, Lead, nationality
where he acquired Swiss citizenship with his entire family in 1906
Sources
1. Mikhail Dolivo-Dobrovolsky (Wikipedia)
Lead
2 January 1862
Lead, nationality
where he acquired Swiss citizenship with his entire family in 1906
Life
he received an honorary doctorate from the TH Darmstadt
View the Source2. Mikhail Dolivo-Dobrovolsky (Linda Hall Library)
Scientist of the Day, final paragraph
Health problems forced him to retire in May 1919, and he passed away six months later.
Scientist of the Day, three-phase motor paragraph
He determined that he could significantly increase the motor's output by using three currents rather than just two.
View the SourceInduction motor (Wikipedia)
Invented: Induction motor, History, Dolivo-DobrovolskyQuote, Invented: Induction motor, History, Dolivo-Dobrovolsky
Mikhail Dolivo-Dobrovolsky invented the cage-rotor induction motor in 1889
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