Sorry if this is a stupid question. EVs use single speed transmission because the AC motor has instant torque. But they still use a transmission, the motor turns gears that turn the wheels. My question is, why not just directly spin the wheels with the motor?
In: Engineering
They can spin very fast. The motor has a much higher max RPM than it would ever be able to use due to power limitations and the problem of wind resistance. Torque, however, is something that is very useful. With gear reduction you gain torque to the wheels at the expense of max speed.
Latest Answers