Electric motors are very efficient compared to gasoline or diesel engines, but it seems like there is still room for improvement. One promising company working on this is a spin-off from Oxford university called Yasa Motors (“Yasa” stands for “Yokeless And Segmented Armature”). Their electric motor was first developed for the Morgan LIFEcar high-performance hydrogen car, but its characteristics – 50% of the volume giving 2x the torque for the same power output – mean it could be used in other things than electric cars, including renewable energy generation and aerospace (lighter airplanes use less fuel…). Even electric bikes could benefit!
– from treehugger