Inventor Year Key Contribution Nikola Tesla 1887 Filed US patents for a polyphase induction motor, demonstrating a practical and efficient design. Dolivo-Dobrovolsky's work established the standard architecture for the modern induction motor, showcasing its power, efficiency, and suitability for industrial applications.
1887 Tesla Patent and the Birth of the Modern Induction Motor
Refinement and Commercialization by Mikhail Dolivo-Dobrovolsky While Tesla and Ferraris provided the crucial theoretical foundation, it was the Russian engineer Mikhail Dolivo-Dobrovolsky who truly refined the invention and proved its commercial viability. The induction motor, a cornerstone of modern electrification, represents one of the most significant inventions in the history of electrical engineering.
This design was a critical advancement, as it was simpler, more robust, and more efficient than earlier two-phase models. In 1889, he built and demonstrated the first three-phase induction motor with a short-circuited, or "squirrel cage," rotor.
1887 Tesla Patent: The Birth of the Modern Induction Motor
The question of when was the induction motor invented does not point to a solitary date, but rather to a period of intense innovation where the principles of electromagnetism were transformed into a robust, reliable machine that would power the industrial world. In 1887, Tesla filed for patents in the United States, while Ferraris presented his research on his own induction motor to the Royal Academy of Sciences in Turin around the same period.
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