> On 08/11/2014 08:37 PM, Chris Tromley via EV wrote: > Also, I've never heard of anyone with an electric motor with a > manual transmission or direct drive that chooses to use the clutch. > That's generally considered an awkward work-around for a problem > that should be fixed.
On 12 Aug 2014 at 7:00, Jay Summet via EV responded: > What is the problem, other than parasitic power loss? Having a clutch in your conversion makes for easier gear changes, if you need gear changes. (Keeping the transmission lets you use a less powerful motor and controller.) In this case, I thought Chris was talking about slipping the clutch for starting. I agree with him that this shouldn't really be necessary for an EV. After all, most don't idle. However, there was one particular ADC motor and Curtis controller combination some years ago in which the motor didn't have enough inductance for the controller's current limit to work right at very low speeds. Here's a marvelously understandable explanation of what was wrong, written some years back by Lee Hart : http://www.evdl.org/pages/hartcontroller.html The practical upshot of it was that starting up from a stop usually caused an uncomfortable lurch. The workaround for many folks who used this combination was to slip the clutch a bit when pulling out. David Roden - Akron, Ohio, USA EVDL Administrator = = = = = = = = = = = = = = = = = = = = = = = = = = = = = EVDL Information: http://www.evdl.org/help/ = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Note: mail sent to "evpost" and "etpost" addresses will not reach me. To send a private message, please obtain my email address from the webpage http://www.evdl.org/help/ . = = = = = = = = = = = = = = = = = = = = = = = = = = = = = _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
