On 14 Jan 2016 at 6:34, dovepa via EV wrote: > You left out the fact that series motors get too hot when operated at highway > speed for extended periods of time.
Can you explain what would cause this? Not being an engineer, I don't understand why a series motor producing a given amount of power would produce more heat than a shunt, sepex, or induction motor. Is it that the efficiency is lower? The Prestolite and ADC series motors had/have built in fans, but a fair number of builders add more cooling. Typically it's a nice beefy bilge blower firing into a collar attached to the brush access ports. That's another source of noise. :-( Come to that, though, Solectria's 1990s-era induction motors had big fins on the outside, and they had to have a big axial fan forcing air over those fins. Without the fan, they'd overheat on the highway. Those were supposedly pretty efficient motors, too, and not really all that powerful. 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 Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
