Asynchronous motor history

The asynchronous motor was invented in 1885 by the Italian physicist and electrical engineer Ferraris. In 1888, an experiment report was put forward, which gave a strict scientific description of the rotating magnetic field, which laid the foundation for the future development of asynchronous motors and self-starting motors. Ferraris believed that the scientific value of the rotating magnetic field theory he proposed and the new products he developed far exceeded the material value, so he deliberately did not apply for patents for his inventions, but demonstrated these latest updates to the public in the laboratory. Results. He also advocated the use of alternating current systems. In the same year, Nikola Tesla obtained a patent for an induction motor in the United States. A year later, Mikhail Dolivo-Dobrovolsky invented the cage asynchronous motor. The development of asynchronous motors is rapid. For asynchronous motors of the same size, the rated power has grown from 5.5kW in 1897 to 74.6kW in 1976. Now, the squirrel cage asynchronous motor is the most widely used asynchronous motor.