ions82
100 W
I am helping a friend figure out the best drive for an off-road handcycle. It's a beast of a rig that, when outfitted with a motor and battery, will weigh in at 70+ pounds. Off-road handcycling is a slow-going affair. It's not uncommon to be going 2-3 mph on rough, uphill terrain. We have been leaning toward using a geared hub motor for efficiency and freewheeling ability.
The plan was to buy a 12T hub from em3ev and run it at 48V (in a 26" wheel.) However, the folks at em3ev are recommending a 10T run at 36V as it has more copper in the motor. I was under the impression that using additional copper as a heat sink isn't always the best idea and that running fewer amps is the preferred way to avoid heat buildup. For a heavy bike going uphill at 3-4 mph (or less) I assumed lower amps would be paramount. Does anyone have some advice to offer?
The plan was to buy a 12T hub from em3ev and run it at 48V (in a 26" wheel.) However, the folks at em3ev are recommending a 10T run at 36V as it has more copper in the motor. I was under the impression that using additional copper as a heat sink isn't always the best idea and that running fewer amps is the preferred way to avoid heat buildup. For a heavy bike going uphill at 3-4 mph (or less) I assumed lower amps would be paramount. Does anyone have some advice to offer?