gq: One of the things Tesla developed at that laboratory in 1887 was an induction motor that ran on alternating current, a power system format that was starting to be built in Europe and the United States because of its advantages in long-distance, high-voltage transmission. The motor used polyphase current which generated a rotating magnetic field to turn the motor (a principle Tesla claimed to have conceived in 1882). This innovative electric motor, patented in May 1888, was a simple self-starting design that did not need a commutator, thus avoiding sparking and the high maintenance of constantly servicing and replacing mechanical brushes.
Question: When did Tesla make the induction motor? Question: What did Tesla develop in 1887? Question: what sort of design was this motor? Question: Why was AC electricity gaining popularity? Question: When was Tesla's innovative motor patented? Question: When did Tesla patent the motor? Question: What did Tesla's design not need? Question: What high maintenance part did Tesla's AC motor not require? Question: What did his design avoid in not having a commutator?