Alan B wrote:
Liquid cooling - the next level.
Yeah, air cooling just didn't cut it - I have a lot of sand around on the tracks where I live and I don't like having to baby it. When you think about it the thermal path in a standard hub motor is just ridiculous, if you were trying to thermally insulate the windings from the outside you couldn't do a much better job
I may borrow bits of this for my powerchair motor project,http://www.endless-sphere.com/forums/vi ... 30&t=32838
if I find it gets more than warm during use.
I have a PC water cooling radiator system laying around, includng it's pump and whatnot, and a bunch of other fittings, so I might be able to use only what I already have to do it.
You're welcome to, not too hard to do, just a bit of time required.
Awesome work Keyne! All the milling work on the outside of the hub was impressive enough until I kept scrolling down and saw the results of the water cooling. How long is the motor pulling that sort of current up the hills you're riding ? 1 minute ? 5 ? 10 ? Either way I guess the proof is that it runs much cooler doing runs that would get it significantly hotter.
Looking forward to the results of more tests.
Thanks! The tests I did on my 'favourite' hill were only about 2-3mins of gravel, 15-20% grade uphill each time. It was kind of representative of the hardest riding that I would usually do. I'll do some better testing next time I'm in the same place as my bike
I have the NZ equivalent of pikes peak lined up!
If it doesn't stand up to longer hills I can just add in a coolant reservoir
It means I am able to add or remove thermal mass from the system as I like.
Yeah, like that's really nice and all, but you can't just be making one for yourself anymore... You gotta start up an assembly line and distribution center...
Just kidding. Epic!
Give me a few months
Just a matter of a PhD to finish, a new house to move into, and a workshop to fit out, then we can chat
Nice work, I'm actually thinking doing the same thing with my 9C 2805, light motor with cooling can be really nice for me and allot of potential for many people here, Thx for sharing it
Yeah, a 9c is a great motor, the cooling channel would be a bit more complicated as it has bits that stick up in the stator, but would be great for a light weight option. I remember working out that it could be made to be sub 5kg
Only problem is that people who want to bother with liquid cooling would want a more powerful motor to start with - maybe a HI40? What do you say Hyena?