3 ms·

I feel like there must be some clever solution to this using heat sinks / heat pipes.

• londons_explore 2y ago
  There is, but weight, cost, etc. BLDC motor design also has a conundrum - most of the heat is made in the motor coils, and they can be designed to get up to about 250C, which makes them easy to cool. However, they are wrapped round thermally conductive steel touching thermally sensitive neodymium magnets which have to stay below ~60C for full performance. So it isn't simply a matter of getting rid of heat - it's a game of preventing heat transfer.
  • InSteady 2y ago
    Weight really isn't such an issue with ebikes. I'm riding around a 62lb clunker, carry a 10lb chain lock everywhere, plus I'm hauling big loads of groceries and other crap. Even an extra 5lbs isn't going to make a big difference, nor would an extra $150 to the purchase price if it means years of added longevity. The engineering challenges make sense. Hopefully it is something that is being actively R&D'd.