Roadster Technoloy - Motor | Tesla Motors
Well...The Tesla Roadster uses a three-phase Alternating Current (AC) Induction motor. The AC Induction motor was first patented by Nikola Tesla in 1888. AC Induction motors are widely used in industry for their reliability, simplicity, and efficiency.
The Roadster motor has two primary components: a rotor and a stator. The rotor is a shaft of steel with copper bars running through it. It rotates and, in doing so, turns the wheels. The stationary stator surrounds, but does not touch, the rotor. The stator has two functions: it creates a rotating magnetic field and it induces a current in the rotor. The current creates a second magnetic field in the rotor that chases the rotating stator field. The end result is torque. Some motors use permanent magnets, but not the Roadster motor -- the magnetic field is created completely from electricity.