In case it matters you may need to license ebikes with motor greater than 750W. Ymmv
On May 28, 2017 4:19 PM, "George Tyler via EV" <ev@lists.evdl.org> wrote: > Have a look at ebikes.ca , they have a setup that is basically a hub > motor used like mid motor run at a higher voltage and RPM than it is > normally used at, called the "strokemonkey". A 24V, 1kw motor used at 48V > gives 2kw. There is a calculator on there that is very helpful. Verne > Pavreel who has posted a few times Has a similar setup, one of the issues > with ebike setups is that the quoted efficiency is the maximum, on a hill > you are often getting 50% with common ebikes. A more powerful motor will do > better on hills if run at the same power as the 50% ones, but then the > efficiency at light load suffers. Running the motor through a transmission > with gears that can be changed can help a lot to achieve high efficiency at > both extremes at the expense of drive complexity and reliability. > A 1kw ebike motor may draw 5A 48V at full speed lo load! While a > Prius 40kw draws 1A... obviously much more effort has been put into making > the Prius motor high efficiency. I have thought of using the Prius MG1 > motor, the small 20kw one, in an ebike. What current does the Lynch motor > draw running free at 48V? anyone know? > > -----Original Message----- > From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Lawrence Rhodes > via EV > Sent: 29 May, 2017 6:53 AM > To: ev@lists.evdl.org; ev-requ...@lists.evdl.org > Subject: [EVDL] Most efficient drive system for a bicycle/tricycle. > > 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 plus my 250 > pound hunk O' fat. Lawrence Rhodes > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/ > attachments/20170528/da9dcde9/attachment.htm> > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag > racing at NEDRA (http://groups.yahoo.com/group/NEDRA) > > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/ > group/NEDRA) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20170528/1d036f91/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
