Lawrence Rhodes via EV wrote:
I'm looking at options for my Terratrike. Mid vs hub seems to be the thing.
Seems bike systems are only 80% efficient. Has any one had good success with
efficiency as well as speed. I'm looking to top out at 30mph with a 20 inch
wheel. Is voltage an issue? I'd like to keep it to 48vdc but I'm willing to
go higher or lower if it is an advantage(money or performance). I will
eventually have a shell with solar panels...
Maybe a Lynch motor (Lynch, Lemco, Etek, AGNI, etc.)? They are over 90%
efficient, and being a DC motor, can be switched straight to the battery for no
controller losses. Rig a series/parallel setup with switches or relays to get
12v/24v/48v for speed control; that's also essentially 100% efficient.
Any intelligent fool can make things bigger, more complex, and more
violent. It takes a touch of genius, and a lot of courage, to move
in the opposite direction. -- Albert Einstein
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
Read EVAngel's EV News at http://evdl.org/evln/
Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)