2w ago

ZF (Germany) designed a motor without rare earth and a new small gearbox which includes a differential gear. Subtitle translation is available

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Renault EV's have their own variation of magnetless EV motors that they install on all their EV. So they need less (now very expensive) rare earth metals.
Please forgive my ignorance in this topic. I was under the impression that rare earths were mostly used in batteries and not necessarily in electric motors.
- ... and also in electric motors.
  
  More precious rare earth minerals saved for the batteries.
- Most EVs use permanent magnet (neodymium) motors because they're more efficient than induction motors.
  
  Ah I didn't know that, thanks!
  Do you know why they're more efficient? My intuition would wrongly expect permanent magnet based motors to be less efficient
- I assume every modern electric motor like this has a built in control and monitoring circuit, but yeah idk what else could be rare earths.
  
  Magnets. Electric motors tend to use permanent magnets.

8 comments