Back when folks initially began putting together their own electric cars they didn't have many cost-effective decisions in motors. Often the 1st EVs used surplus aircraft starter-generators as a motor.
Aircraft starter/generators were most likely used because you could find them as surplus relatively cheap and they'd enough power to move an automobile. The EVs were not hi-performance, but could make it from point A to B.
the times of plodding electrical vehicles were numbered. 'Electric cars are driven by big electric motors generally rated between 3.5 and twenty-eight hp. For those accustomed to gas engines, this may not seem like much power, but the rating systems used for gas engines and electric motors are so different the numbering system is sort of meaningless. The peak hp of an electric motor is mostly 8 to ten times its continuous rating.'
The motor installed in Eve is an advanced DC FB1-4001. This is a 9' diameter, 140lb series wound DC motor. The one part that wears out, commutator brushes, generally last eighty thousand miles and are pretty simple to replace.
On the first EV I failed to tighten one of the motor-transmission adaptor set screws and over a period of 5 years the adaptor worked its way into the motor faceplate and wore away some of the metal. In the process it damaged the bearing. I found a local electric motor shop to replace it for $100, including parts and labor.
The hand drawing shows the way in which the motor mates to the transmission.
there is a much bigger choice of motors nowadays for all sizes of vehicles and performance needs. Get your electric car motor kit at www.gas2electricity.com!
Electric Car Motor Kit
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