Ben, Roland is running his A/C as "regenative braking" so he does not use battery power - some of the time.
Cor van de Water Chief Scientist Proxim Wireless office +1 408 383 7626 Skype: cor_van_de_water XoIP +31 87 784 1130 private: cvandewater.info www.proxim.com This email message (including any attachments) contains confidential and proprietary information of Proxim Wireless Corporation. If you received this message in error, please delete it and notify the sender. Any unauthorized use, disclosure, distribution, or copying of any part of this message is prohibited. -----Original Message----- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Ben Goren via EV Sent: Thursday, June 11, 2015 1:33 PM To: Roland; Electric Vehicle Discussion List Subject: Re: [EVDL] DIY EV air conditioning? 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 <ev@lists.evdl.org> 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:ev@lists.evdl.org> > > To: Chris Tromley<mailto:ctrom...@gmail.com> ; Electric Vehicle > Discussion List<mailto:ev@lists.evdl.org> > > 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-F > requency-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.ax > d> > > 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" >> <ev@lists.evdl.org<mailto:ev@lists.evdl.org>> 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/in >>> dex.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/NE >>> DRA>) >>> >>> >> -------------- next part -------------- An HTML attachment was >> scrubbed... >> URL: >> <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150611/f >> bac298a/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/ind >> ex.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/NE >> DRA>) >> >> > > _______________________________________________ > UNSUBSCRIBE: > http://www.evdl.org/help/index.html#usub<http://www.evdl.org/help/inde > x.html#usub> > http://lists.evdl.org/listinfo.cgi/ev-evdl.org<http://lists.evdl.org/l > istinfo.cgi/ev-evdl.org> For EV drag racing discussion, please use > NEDRA > (http://groups.yahoo.com/group/NEDRA<http://groups.yahoo.com/group/NED > RA>) > > -------------- next part -------------- An HTML attachment was > scrubbed... > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150611/1e > fe84be/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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