Join Date: Jun 2007
Location: Vancouver, BC
Bikes: Rocky Mountain electric bike
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Originally Posted by EvilV
That setup you have there is very impressive. I watched your videos in the kitchen while I was cooking dinner this evening, and I'd like to know more about how you did that stuff.
The motor is an off the shelf Crystalyte X503, controller is a 72v x 35A Crystalyte with upgraded (IRFB4110) MOSFETs and adjustable current limiting. 76 NiMH 2D cells make a 92.1v x 20Ah pack, and the best part is anyone could build this power system with no special tools, machining or fabrication. All parts including the DrainBrain were purchased from www.ebikes.ca
and mostly assembled in my living room. Installing the high performance MOSFETs requires some soldering skills, and there's an excellent tutorial here:
Most of my commuter riding averages 30-35mph, but it's nice to have extra power to maintain speed on hills, as well as going with the flow of traffic to take the shortest route.
Simplicity and availability rules.