I'm not sure I follow by "not use battery power." Do you mean that you don't have any high voltage connection to the A/C unit, and use a purely mechanical connection between it and the vehicle's main traction motor? That would still be battery power, of course, but indirectly....
b& On Jun 11, 2015, at 7:34 AM, Roland via EV <[email protected]> wrote: > > One more thing to add to the A/C driving off the motor pilot shaft. I do not > use battery power to drive the motor at the same time the A/C comes on or > even when the electric heaters come on. How do I do this? This is how: > > > > A A/C or electric heater does not run all the time. In a A/C system there is > a High Pressure and Low Pressure Switches. In a heater there are also high > temperature limit switches. > > > > The on dash switch controls a A/C relay which is also control by the high and > low pressure switches. Even if you turn on the dash A/C switch, the A/C pump > may not engaged because the pressure may be up and the low pressure switch is > not turn on which controls the A/C pump electric clutch. > > > > Only the blower fans come on when you turn on the A/C or Heater control > switches. > > > > So as to prevent either the heater or A/C to operate, I install or use a > limit switch that comes with the Curtis 5K accelerator control. The dash A/C > and or Heater control circuit is control by this limit switch. When I > depress the accelerator pedal, the limit switch turns off the A/C or Heater > control circuits and when I let up on the accelerator, it turns these > circuits back on. > > > > In the A/C system, many times it does not effect the A/C cooling, because the > A/C pump may be up to pressure and the clutch is disengaged anyway. > > > > So far since installing this control system in 1980, I never had these units > run by the main battery power, except for testing only. > > > > Roland > > > ----- Original Message ----- > > From: Bill Dube via EV<mailto:[email protected]> > > To: Chris Tromley<mailto:[email protected]> ; Electric Vehicle Discussion > List<mailto:[email protected]> > > Sent: Thursday, June 11, 2015 8:03 AM > > Subject: Re: [EVDL] DIY EV air conditioning? > > > > You would need a lot of ice, hundreds of pounds, to provide the > refrigeration needed. > 12,000 BTU/hr is the rating of a typical car air conditioning unit. This > is literally equivalent to one ton (2000 lbs) of ice per day. > > "Hacking" some OEM EV air conditionaing, like from a Prius, is likely > the best option. There are also inverter driven (VFD) home compressors > that would likely work as well, but aren't as rugged as the OEM EV air > conditioning compressors. > > I would investigate small, single phase input, three phase output, > variable frequency drives (VFD) instead of building my own inverter from > scratch. Like a TECO: > http://www.surpluscenter.com/Electric-Motors/3-Phase-Motors/Variable-Frequency-Drives/1-HP-TECO-VFD-115-VAC-1PH-INPUT-3PH-OUTPUT-11-3424.axd<http://www.surpluscenter.com/Electric-Motors/3-Phase-Motors/Variable-Frequency-Drives/1-HP-TECO-VFD-115-VAC-1PH-INPUT-3PH-OUTPUT-11-3424.axd> > > Likely will run nicely from DC. Certainly cheap to try. > > Bill D. > > > > On 6/11/2015 6:35 AM, Chris Tromley via EV wrote: >> If A/C demands aren't great, I've wondered if you could get away with a >> cooler, some ice packs, some water to carry the "cold" and a circulation >> pump to run the water through a tubing network installed in a seat cover. >> I know it sounds crude, but that's how NASA cools astronauts. Almost all >> the energy would come from the freezer that chills the ice packs. Could be >> inconvenient, but if the car is for commuting, just throw ice packs in the >> fridge at work. >> >> Chris >> On Jun 10, 2015 5:44 PM, "Ben Goren via EV" >> <[email protected]<mailto:[email protected]>> wrote: >> >>> So, I can imagine all sorts of ways that one might run air conditioning in >>> an electric vehicle, but I'm sure others have actually tried and done >>> different ways and likely figured out the best general approach. >>> >>> Any of those others reading these words and care to point me in a good >>> direction? >>> >>> This'll be starting from scratch in a vehicle that never had air >>> conditioning in the first place but for which both factory and aftermarket >>> air conditioning systems are available that run off of a pulley on the ICE >>> engine. >>> >>> Thanks, >>> >>> b& >>> _______________________________________________ >>> UNSUBSCRIBE: >>> http://www.evdl.org/help/index.html#usub<http://www.evdl.org/help/index.html#usub> >>> http://lists.evdl.org/listinfo.cgi/ev-evdl.org<http://lists.evdl.org/listinfo.cgi/ev-evdl.org> >>> For EV drag racing discussion, please use NEDRA ( >>> http://groups.yahoo.com/group/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/20150611/fbac298a/attachment.htm<http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150611/fbac298a/attachment.htm>> >> _______________________________________________ >> UNSUBSCRIBE: >> http://www.evdl.org/help/index.html#usub<http://www.evdl.org/help/index.html#usub> >> http://lists.evdl.org/listinfo.cgi/ev-evdl.org<http://lists.evdl.org/listinfo.cgi/ev-evdl.org> >> For EV drag racing discussion, please use NEDRA >> (http://groups.yahoo.com/group/NEDRA<http://groups.yahoo.com/group/NEDRA>) >> >> > > _______________________________________________ > UNSUBSCRIBE: > http://www.evdl.org/help/index.html#usub<http://www.evdl.org/help/index.html#usub> > http://lists.evdl.org/listinfo.cgi/ev-evdl.org<http://lists.evdl.org/listinfo.cgi/ev-evdl.org> > For EV drag racing discussion, please use NEDRA > (http://groups.yahoo.com/group/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/20150611/1efe84be/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) > -------------- next part -------------- A non-text attachment was scrubbed... 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