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Thick vs thin (wires)


#1

Found a new iteration of a hub motor. I’ve never seen such thick wires. I had read Vedder’s article (http://vedder.se/2014/10/chosing-the-right-bldc-motor-and-battery-setup-for-an-electric-skateboard/) but don’t quote understand so I wanted to ask you all. What’s the real advantages of this?


#2

For starters, it looks cool!


#3

Clean windings.

thicker gauge wire, less turns, higher KV, higher current? Not entirely sure.


#4

That’s from the latest Mellow Board Kickstarter update


#5

When you see a large number of thin wires most of them are actually placed in parallel and result in a motor with a higher fill factor (lower impedance for the same inductance ) resulting in a higher efficiency. Also for pwm frequencies higher then 4kHz isch the skineffect becomes an interesting factor as well -> https://en.wikipedia.org/wiki/Skin_effect . For skineffect multiple small strands in parallel (litze wire) are beneficial as well.


#6

That’s funny… I was just reading this:
http://www.aerodesign.de/peter/2001/LRK350/Skin-Effekt.html#Anker460629