To be honest, i'm getting tired of hub motors.
The freewheel choices are limited ( 3spd for the clyte 54xx, 1 spd for the hubzilla ), the efficiency is lacking, the water ingress problem has never been solved, and getting best performance due to the low RPM involves using a tiny wheel, which limits the choice of bicycle greatly. ( especially if you are taller like me )
I want something that performs like my magic pie on 125v. Something that gets up to 40mph like a rocket on a 26" wheel.
So thus i am ready to take my adventure into joining the m.e.n.s club, and i have an idea to use one of these:
Motenergy PMSM/BLDC 24-72V Brushless Motor ME4201https://www.cloudelectric.com/ProductDetails.asp?ProductCode=MO-ME4201&CartID=1
Confirmed info, per my phone conversation with one of motenergy's engineers:
+ 50 RPM/v, so 12S / 46v nominal would produce 2300rpm unloaded. 20S/76v would produce 3800rpm unloaded.
+ ~4.5kw continuous, ~9kw peak
+ Comes with temp sensor.
+ 300f / 150C temp limit before the magnets go. Advised to not push it beyond 100C for longevity.
+ 8 pole, brushless, axial flux goodness from the company formerly known as MARS ( name changed due to lawsuit threats )
For the controller, i want to start out with a modded infineon 24FET controller and take it from there.
So i got a couple questions..
1) Has anyone else who is still active on the forum done this?
2) Is a single stage reduction OK? IE 11T to 66T to tune 3800rpm unloaded down to a nice 633rpm unloaded at the wheel?
3) what size chain and sprockets could be used? i was reading a thread by liveforphysics who said he is using #35. I guess i am looking for confirmation that #35 is good stuff.
4) can a rear disc brake on a standard bike wheel handle 6kW being dumped into it? Do i need a special hub or spokes?
Thank you in advance..
- m.e.n.s club hopeful