Galileo Ferraris (31 October 1847 – 7 February 1897) was an Italian university professor, physicist and electrical engineer, one of the pioneers of AC power system and inventor of the induction motor although he never patented his work.

He published an extensive and complete monograph on the experimental results obtained with open-circuit transformers of the type designed by the power engineers Lucien Gaulard and John Dixon Gibbs.

Born at Livorno Vercellese (Kingdom of Sardinia), Ferraris gained a master's degree in engineering and became an assistant of technical physics near the Regal Italian Industrial Museum.

On 11 March 1888, Ferraris published his research in a paper to the Royal Academy of Sciences in Turin (two months later Nikola Tesla gained U.S. patent 381,968, an application filed 12 October 1887.

The field denned as the author of the cone opening angle, the tip of the first main points of the lens, and its base formed by the parts of the object in view, will possess the same brightness.

In January 2021 Ferraris was honoured by the IEEE Milestones program for his contribution to "the technological innovation and excellence for the benefit of humanity", namely for his “Rotating Fields and Early Induction Motors, 1885-1888”[1].

The according plaque carries the inscription:Galileo Ferraris, professor at the Italian Industrial Museum (now Polytechnic) of Turin, conceived and demonstrated the principle of the rotating magnetic field.

Ferraris’ field, produced by two stationary coils with perpendicular axes, was driven by alternating currents phase-shifted by 90 degrees.