Peri, The vacuum pump runs off 12V, not off the pack. I guess the vacuum pump should be on a relay that either gives a delay or is controlled by a signal from the IOTA or even from the controller, which will trigger the power brakes only once the vehicle is driven. This signal should latch the relay "on" until the key is turned off. Latching is done by one of the relay contacts providing power to the coil so that once energized, the relay stays energized.
Cor van de Water Chief Scientist Proxim Wireless Corporation http://www.proxim.com Email: [email protected] Private: http://www.cvandewater.info Skype: cor_van_de_water Tel: +1 408 383 7626 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Peri Hartman Sent: Saturday, November 16, 2013 2:23 PM To: 'Lawrence Rhodes'; 'Electric Vehicle Discussion List' Subject: Re: [EVDL] Relationship between the DD\DC CONVERTER&battery Why do you have the vacuum pump running while the car is parked? Can't the pump run for several seconds after "starting" the car? In other words, hook the pump to the other side of the main contactors. Peri -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Lawrence Rhodes Sent: 16 November, 2013 1:59 PM To: [email protected] Subject: Re: [EVDL] Relationship between the DD\DC CONVERTER&battery The problem is the vac pump draws down the aux battery so the contactors won't close and the car can't start. It's a matter of voltage. The pump will work until the battery is dead. However this doesn't allow enough voltage through to close the contactors. ONce the contactors close the Iota takes over and all is well. Wipers lights vac pump. No porblem. Drawing down the battery takes two months. The battery is an Optima style battery which is plenty tough. I've even increased the charge voltage by inserting the phone plug. Doesn't help much. Could be I just don't use the EV enough as we have a Leaf now. The solution is to simply charge the aux battery once a month. Lawrence Rhodes..... -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20131116/6cdee429 /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)
