This is what his mother would call him, and according to David's recollection his mother told him that if she hadn't abused him so severely she would have killed him and buried him out in the backyard. It was only a very on the ball teacher that saw the plight David was in and reported the abuse.his is what his mother would call him, and according to David's recollection his mother told him that if she hadn't abused him so severely she would have killed him and buried him out in the backyard. It was only a very on the ball teacher that saw the plight David was in and reported the abuse.
IMHO, AC Propulsion (Tesla Motors) uses AC because a mechanically commutated DC motor that meets the high turn down ratio of a vehicle application is more complex than an electronically commutated AC motor.
As others answerers have mentioned already, Tesla apparently make the Model S motor in-house. My source for this is National Geographic (magazine)'s Megafactories documentary episode on Tesla Motors. To quote the episode: [Like the Model S battery pack, the Model S] motor unit is also developed in-house [at Tesla Motors]. It's essentially an AC induction motor, a concept invented by 19th century scientist, and Tesla Motors namesake, Nikola Tesla. He harnessed an electromagnetic field to turn a basic electric motor.