Why does fuel economy get better on the highway, but EV range gets worse?

Question

Why does fuel economy get better on the highway, but EV range gets worse?

In: 463

Answer 1

Guys you are all forgetting about back EMF. Correct me if I am wrong but As the EV speeds up to highway speeds it’ll start experiencing more and more back emf. It can’t change gears and go into a lower revs. Tesla has a third motor specially geared for highway speeds for this reason.

Explaining Back EMF, as a motor moves faster and faster it starts producing eddy currents which start to oppose the movement of the motor.