- Posted October 29, 2010 by
This iReport is part of an assignment:
Ebike hackers: Show off your hacks!
Dual Motor eBike
San Francisco has some very steep hills. Most ebikes can't cut it. A bike conversion with two hub motors works very well. These are three prototypes that worked well on the hills up to a 20% grade. With both wheels being powered, the efficiency of each motor is increased. Two of the bikes had dual direct drive motors, and the other had one direct drive and one geared motor. The direct drive motors are good for high power applications, and geared motors, with a 4:1 internal gear ratio, are good for low speed torque. Each motor was powered by a 36V Lithium battery pack. Total power was about 1500 watts.