I am an electrical engineer by vocation. I can assure you that 99% of electrical motors in use today are in fact 3 phase AC motors. That goes for any electric motor from you electric tooth brush to your subway car.
Tesla's main contribution is 3 phase AC electric systems. Including generator/motor and long range transport systems, pretty much your standard electric grid.
Only things using DC current nowadays are electronic devices. However they still depend on AC power lines.
I am an electrical engineer by vocation. I can assure you that 99% of electrical motors in use today are in fact 3 phase AC motors. That goes for any electric motor from you electric tooth brush to your subway car.
Tesla's main contribution is 3 phase AC electric systems. Including generator/motor and long range transport systems, pretty much your standard electric grid.
Only things using DC current nowadays are electronic devices. However they still depend on AC power lines.