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It's possible if an electric car had a manual transmission, but no company had yet built one because electric motors cam regulate revolutions per minute with am
by Annatar 10y ago
It's possible if an electric car had a manual transmission, but no company had yet built one because electric motors cam regulate revolutions per minute with amperage and voltage. However, no studies that I'm aware of to determine whether the battery range could be extended with gear ratios have been performed.
- Already__Taken 10y agoBest evidence you might find is the logic in formula-e. quickly found a subreddit thread with the question https://www.reddit.com/r/FormulaE/comments/2gbika/why_do_formula_e_cars_have_a_five_speed_gearbox/ https://www.reddit.com/r/FormulaE/comments/2gbika/why_do_for...
- evanreichard 10y agoThe Rimac Concept_One is a fully electric car that has two gears (DCT though). I'm not sure any one has tested as to whether the range is extended in one gear vs the other. I would assume it would.
- extrapickles 10y agoThe main issue is that the efficiency curve of a electric motor is fairly flat once it gets >60% load[0]. There is a small hump typically around 60-80% output that is most efficient, but its only a few percent at best, so not worth the cost of a high torque transmission as adding a few extra batteries to cover the loss at slow speeds is much cheaper. When cost is no object (eg: racing) you see transmissions so they can get peak power for longer. Even in a application that I was involved in where power was ~$200/Watt, fixed gearing was chosen as the extra weight of the transmission made the whole system less efficient than what was gained by the transmission. [0]: http://digitalcommons.calpoly.edu/cgi/viewcontent.cgi?article=1004&context=bae_fac http://digitalcommons.calpoly.edu/cgi/viewcontent.cgi?articl... (Its for Irrigation pumps, but still in the same class of power output as cars)