In 1866 came the birth of the electric machine when the German scientist Werner Siemens invented the “first direct current generator” mrosupply . This was the last step of studies, researches and inventions of many other scientists, for almost three centuries. In 1600, William Gilbert, an English scientist, found the “magnetic attraction force”. The electrostatic machine was built in 1663 by the German Otto Guericke, and improved in 1774 by the Swiss Martin Plant.
The Italian professor Aloiso Galvani in 1786 verified the animal electricity and another Italian, Alessandro Volta, discovered the electrical tension. In 1799 he developed the Volta column, which equipped electric current.
In 1820, the Danish physicist Hans Christian Öersted noticed an electric current in a compass, it was the first step for the electric motor. The English cobbler William Sturgeon in 1825 invented the “electromagnet”. The English Michael Faraday in 1831, the electromagnetic induction and in 1832 the Italian scientist S. Dal Negro built the first AC machine. In 1833 the Englishman W. Ritchie invented the switch. If we analyze the development of electric machines through history, evaluating the current technological exercise, we might think that there is nothing else to do, but we know that development does not stop.