Main invention contributions: alternating current, Tesla coil, particle beam weapon
Tesla turbine engine, asynchronous motor
Rotating magnetic field, ground stationary wave, Bifilar Coil
Overview of wireless technology: Tesla's lifetime of inventions bear witness to his selfless contributions to society. Although he devoted his life to continuous research and obtained about 1,000 patented inventions. But he was in poverty in his later years and suffered from financial constraints for many years. Although many entrepreneurs took advantage of this genius scientist's love and talent and defrauded him of his research results and honors, in his later years he still worked hard to research and invent for the happiness of mankind. Among Tesla’s many inventions, the ones that benefited the public the most are alternating current (AC) and AC generators. In every corner of the world, the development of economy and trade, scientific progress and enjoyment of life are inseparable from the help of alternating current. The blackouts in the United States and Europe at the end of 2003 brought social and economic paralysis. As early as 1882, Tesla had invented the world's first alternating current generator, and in 1885 he invented multi-phase current and multi-phase power transmission technology, which is now a 50-60 Hz (hertz) method of power transmission that is widely used around the world. . After Edison invented direct current, electrical appliances were widely used, but the electricity bill was very high, so operating and exporting direct current became the most profitable business at that time. By 1884, after Tesla left the Edison Company, he met George Westinghouse, the head of the Westinghouse Company, and with his support, he officially brought alternating current to the society of the day in 1888. At the opening of the World's Fair in Chicago in January 1893, Tesla shocked the crowd by demonstrating that alternating current could power 90,000 light bulbs simultaneously, as direct current simply could not achieve this effect. Afterwards, Tesla obtained the right to undertake the electrical design of the Niagara Hydropower Station based on this demonstration. Since then, alternating current has made a comeback, replacing direct current as the mainstream power supply. Tesla owned the patent for alternating current. At that time, Tesla had to pay a royalty of US$1 for each AC produced. Driven by strong interests, a consortium at that time threatened Tesla to give up this patent and intended to monopolize and profit. After many negotiations, Tesla decided to give up the alternating current patent, on the condition that the alternating current patent would be permanently public. From then on, he tore up the patent for alternating current and lost the right to collect royalties. From then on, alternating current was no longer patented and became a free invention.