that question was obviously not directed to the authors of the article, but to doe_eyes:
> Many large motors don't use permanent magnets, and even for the ones that do, neodymium isn't all that rare and is mined in the US.
What doe_eyes is referring to are motors or generators where the magnetic fields are generated by currents through windings. Under certain conditions it is more LCO efficient to generate magnetic fields that are stronger than even Neodymium magnets can supply.
Your dig about fractional horsepowers is thus misplaced.
The featured article is about electrostatic motors that provide less than one horsepower. Therefore any comparison to "large motors" is kind of off subject.
> Many large motors don't use permanent magnets, and even for the ones that do, neodymium isn't all that rare and is mined in the US.
What doe_eyes is referring to are motors or generators where the magnetic fields are generated by currents through windings. Under certain conditions it is more LCO efficient to generate magnetic fields that are stronger than even Neodymium magnets can supply.
Your dig about fractional horsepowers is thus misplaced.