Electric Earth
100 W
- Joined
- Nov 11, 2018
- Messages
- 113
I've only built an ebike from a kit before, so I didn't have to work out which controller to use. I was reading something on the Grin website about using a controller with a higher eRPM on a smaller wheel. Now that I'm doing a completely cobbled together project, and with small scooter wheels at higher rpm than a standard ebike controller, I'm struggling. I don't see anything about rpm mentioned on the controller specs.
If I'm running a motor that says the rotating speed is 250-1,000rpm, do I need a controller that will work up to 1,000rpm? If so, how do I find that information? Do I need to calculate it somehow, or is that a spec that I should be able to look up for a controller?
I'm looking at trying a wheel from aliexpress like this one. I'd like to be able to buy a controller that I can use later if I decide to upgrade to a nicer 20" wheel scooter/motor. Is that doable, or is this wheel going to take a completely different controller than a larger wheel?
https://www.aliexpress.com/item/4000562249692.html?spm=a2g0o.productlist.0.0.32b02a82Hi2M4P&algo_pvid=66bd9ae0-94f2-458f-9651-6308900e30c9&algo_expid=66bd9ae0-94f2-458f-9651-6308900e30c9-2&btsid=0ab6f82315917959871888207e4477&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_
If I'm running a motor that says the rotating speed is 250-1,000rpm, do I need a controller that will work up to 1,000rpm? If so, how do I find that information? Do I need to calculate it somehow, or is that a spec that I should be able to look up for a controller?
I'm looking at trying a wheel from aliexpress like this one. I'd like to be able to buy a controller that I can use later if I decide to upgrade to a nicer 20" wheel scooter/motor. Is that doable, or is this wheel going to take a completely different controller than a larger wheel?
https://www.aliexpress.com/item/4000562249692.html?spm=a2g0o.productlist.0.0.32b02a82Hi2M4P&algo_pvid=66bd9ae0-94f2-458f-9651-6308900e30c9&algo_expid=66bd9ae0-94f2-458f-9651-6308900e30c9-2&btsid=0ab6f82315917959871888207e4477&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_