With the field weakening setup in my Citicar, it would go faster but consume more watt-hours per mile while activated. Not hard to implement - just a piece of heavy cable or nichrome strip, a contactor, and a control switch to activate the field weakening contactor. There are times when it can be used, and times when it should be disabled so the driver has to pay attention to how field weakening is used.
Tom Keenan On Jan 15, 2013, at 9:18 AM, "Peter C." <crisi...@rci.rutgers.edu> wrote: > http://www.evalbum.com/3373 > > If you are not into Yahoo groups, than the above URL in EVAlbums also shows > some pictures of the van as well. I am intrigued by the 4th contactor for > field weakening!? Could this extend the range more than the 30 miles > estimated for this vehicle? Right now I am still trying to figure out all > the cut wires and where they go?! Wish I had someone here in NJ who could go > over this vehicle with me that actually knows how it works!? > > Peter Crisitello > Rahway, NJ > crisi...@rci.rutgers.edu > > > ----- Original Message ----- From: "Peter C." <crisi...@rci.rutgers.edu> > To: "Electric Vehicle Discussion List" <ev@lists.evdl.org> > Sent: Tuesday, January 15, 2013 11:47 AM > Subject: Re: [EVDL] early no controllers > > >> My 1977 CitiCar uses 3 contactors (two large & one small). As I understand >> it the smaller one is for starting and slower speeds and one of the larger >> ones for full speed (a whopping 35 MPH). The second larger one is for >> reverse when I flip the switch on the dash. >> My 1981 Comuta-Van only uses the first two as it is equipped with a 3 speed >> (clutch less) standard transmission. You can see some pictures of the van >> setup on Yahoo at: >> http://groups.yahoo.com/group/C-Car/photos/album/9282024/pic/2105265578/view?picmode=original&mode=tn&order=ordinal&start=1&dir=asc >> >> Peter Crisitello >> Rahway, NJ >> crisi...@rci.rutgers.edu >> >> >> >> >> >> ----- Original Message ----- From: "Electric Blue auto convertions" >> <electricb...@embarqmail.com> >> To: <ev@lists.evdl.org> >> Sent: Tuesday, January 15, 2013 11:12 AM >> Subject: [EVDL] early no controllers >> >> >>> When I was working for Clark fork Lifts in the late 60s they didnt have >>> controllers as we have today, They used a set of Caps, High voltage >>> rectifiers and Xfrmers , The Xfmers /caps could go as high as 300 volts on >>> a 48 volt battery system, there was 4 large contactors , one was reversing, >>> one was for field weakening , They had what was a very rudimentary >>> "controller" only about 5 or 6 resistors a few diodes and some small caps , >>> this went to the "gas peddle" the large Recs could handle over 1,000 amps . >>> The earliest electric fork lift I worked on was from the early 40s, It had >>> a "gear shift" lever that hit 3 different resistors, "large" for different >>> speeds, and one reversing contactor,, simple and it was still in use way >>> back when I had to rebuild the motor,,,, brushes and clean the Com + >>> springs , thats all it needed >>> -------------- next part -------------- >>> An HTML attachment was scrubbed... >>> URL: >>> <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130115/4807eaf4/attachment.htm> >>> _______________________________________________ >>> 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) >>> >>> >> >> _______________________________________________ >> 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) >> > > _______________________________________________ > 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) > _______________________________________________ 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)
