The robust Bosch e-drive units feature hairpin-type motor windings. The motor does not have a heat exchanger/oil pump — it is directly cooled via coolant circulating through channels in the stator housing. (Munro & Assoc.)

Electric motors are not new. They’re actually quite old. But that doesn’t mean all of their secrets have been revealed. Engineers today are still improving on an idea that has been around for almost … well, that’s the first question.

How much do you know about EV motors? Find out with this quiz.

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Automotive Electrification Energy Engine/Powertrain Power