crossbreak
1 MW
nutspecial said:I'm using #35 and the 11t and 50t are showing some decent wear for >1000mi- I just don't see a bmx chain being happy with even 6kw for long.
for such small sprockets a flanged sprocket would be needed to fit. like this kart sprocket:
http://www.magnaracing.com/index.php?main_page=product_info&cPath=30_363_671&products_id=2674&zenid=97c981fc14ec0ca7f4367276e18eb9c9
sadly, they are very expensive. These sprockets have a 15mm bore. As the motor axle is 17mm, this would need some redesign. i did not find a flanged #35. The smallest non flanged #35 would be 15T if i looked right. But 15t for a #35 or a 13T 415h sprocket fits just right into the picture IMO
you get 15kW FOC controller for little more than $200 these days. Why bother with 6-phase? http://kellycontroller.com/kls7230s24v-72v300asinusoidal-brushless-motor-controller-p-1343.htmlmacribs said:What y'all think, 6 phase revolt sounds hot or not?
If you manage to install a 110mm wide motor assembly, it should not be a problem to mount the controller if it's even smaller.
The larger the controller, the cheaper it gets per kW. So why throw away money and make things more complicated than they have to be?
that's moaning on a high level. From calcs even the non-pro scratches the 90's. Big Block and BHT are far away from that. Try running a BHT at 3000rpm, it get's quite hot even without any load.macribs said:Even if that motor has low efficiency as some posted in this thread
still, better bearings and lamination is what we are after. I think Km² is really sufficient for most ebike needs here...with a simple 4:1 reduction, the rv120 outperforms even the latest Cromotor (Km²= 19.5 N²m²/W) in terms of copper loss. The new Cro is by far the most impressive hubmotor i have seen yet. Still...way to heavy