Teslas center is located in the vicinity of a small village called Smiljan. Teslas birth house and a small church where his father officiated are also located within the center. A small playground is there for the youngest visitors. On a small stream you can see Teslas turbine working. There is also a test station with his transformer (coil) for wireless energy transfer experiments.
Today Teslas house is a museum in which you can see replicas of his most important patents like a metallic egg that spins in a magnetic field and a lot more.
Tesla introduced alternate current (AC) and he tried to make it the standard for electricity transfer, while Edison forced direct current (DC). That conflict was known as ‘The war of the currents’. In the end Teslas idea prevailed because it is easier and more efficient to transfer AC then DC. Today all electromagnetic devices work with AC.
The main Teslas invention in case of the asynchronous motor was the reverse magnetic field. There are three phases which are aligned every 120° and their alternation creates a reverse magnetic field that the rotor follows.