History of the Invention of the Generator

In 1831, the French scientist Faraday invented the disc generator, marking the first generator in human history.
In 1832, the Frenchman Pixii invented the hand-cranked DC generator; it operated on the principle of rotating a permanent magnet to induce an electromotive force (EMF) in a coil through changing magnetic flux, outputting this EMF as a DC voltage.
In 1866, the German inventor Siemens developed the self-excited DC generator.
In 1870, the Belgian inventor Gramme created the ring armature and invented the ring-armature generator. This generator utilized hydropower to rotate its rotor; following repeated improvements, it achieved an output power of 3.2 kW by 1875.
In 1882, the American inventor Gordon built a massive two-phase generator with an output of 447 kW, standing 3 meters tall and weighing 22 tons.
In 1896, Tesla's two-phase AC generator began commercial operation at the Niagara Power Plant, transmitting 3,750 kW of 5,000 V alternating current to the city of Buffalo, 40 kilometers away.