Why can an electric car, not have a generator instead of a motor on one wheel, so that as that wheel turns it generates energy for the battery? I totally understand that it isn’t possible, but I don’t know why. I also understand that regenerative energy is taken from breaking.
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The generator increases the load, so the motors have to work harder than before. As another said this is regenerative braking. You don’t want to do that while accelerating or maintaining speed, because it would increase the account of effort needed. The motors would have to move the car _and_ turn the generator, in effect, so the generator could never make up for the energy the motors have to use.
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