Why can’t one shield the wires with copper braid and encase the motor? How much radio frequency energy is dangerous? One should consider laptop computers and monitors if one is becoming concerned. We live in the US bathed in a 60 cps electrical and magnetic field.
The way I see it, they haven’t found any adverse health effects from an MRI machine (which has one kickass EMF),
so a few electric motors and generators sitting several feet away from you aren’t going to cause any appreciable adverse health effects.