eli5: What makes electrical motors in cars so quiet?

Question

I mean in comparison with other motors, like power tools or even home appliances? Is it just sound insulation or is it a different kind of motor?

In: 50

Answer 1

Bigger motors usually have lower Kv rating so they spin slower but with more power.

Slower = quieter usually.

On top of that, most robust electric vehicles don’t use direct drive motors. They’ll have gearing to manipulate the motor output so that the motor can run at its most efficient speed.