I tested this roll out the hill, and the results are the same. I turn off the idle control when I do this test. If the transmission is in neutral, the motor ampere on the standard amp meter, the Amp on Tach and battery ampere all read 0 amperes.
While I am coasting down the hill, and select a transmission gear, the motor rpm will increase which slows the EV a bit. At this time the motor amp meter which is a separate one with a shunt on the positive wire that is between the motor controller and motor still reads 0 amps as well as the battery amp meter and the E-meter amp indication. BUT, the Tach On Amp ampere raises up to about 30 to 50 amps. As the EV is picking up speed, this motor decreases and when there is a slight rise, the motor ampere decreases. The Stewart Warner tachometer has a selector switch on the back for a 4, 6, and 8 cylinder engines. According to Otmar at Café Electric, a tachometer set for a 8 cylinder engine will not work. I had to select the 6 cylinder setting. The Z1k requires a four pulse input for it to work. I am also using a WarP 11 four pulse pickup unit that is made by Net Gain that sends this four pulse signal to the motor controller. The cable between the pick up and controller is double shield which each separate wire is shield and insulated with another shield over that. I only ground the internal shield at the controller end and the external shield at the pick up sensor at the motor end. Also I use the double shield cable between the out put pin of the controller and the tachometer. Internal wire grounded at the controller mounting base and the external grounding at the tachometer base. Do not relied on just grounding any wire to any sheet metal surface on the EV. The metal body does not make a good conductor which may have overlapping body panels that are painted. I run a large ground wire that starts out from the negative (negative ground vehicle) which goes to the all the grounding points of a vehicle. This is how some fiberglass or carbon fiber vehicles do it. Roland ----- Original Message ----- From: Adrian DeLeon<mailto:[email protected]> To: Electric Vehicle Discussion List<mailto:[email protected]> Sent: Tuesday, October 15, 2013 10:15 PM Subject: Re: [EVDL] WarP-11 Motor Regen? On Tue, 15 Oct 2013 10:44:47 -0700, Roland Wiench <[email protected]<mailto:[email protected]>> wrote: > Have anyone tested out this AMP on TACH mode to see what happens? > > Roland > I have a TransWarp 9 motor (9" diameter, same length as 8" motor) with a Z1K, using AMPS on TACH. I've never seen the tachometer read above 0 unless my foot was on the accelerator. Lots of hills here, so plenty of coasting at high motor RPM. My truck has a Warp 11 with a Z1K also, but I never could get the tach to work. Toyota pickup with electronic speedometer. It might have worked briefly. I've even changed the cluster once or twice... Maybe your throttle is partially on - not enough to trigger the high pedal warning (won't start the controller), but enough to cause the tach needle to move. Could it be EMI? My tach wires were pretty sensitive to noise. I had to move them around and add some capacitors to eliminate interference. Still get interference on my amp-hour counter. Do you have any other stuff hooked to your motor that might be supplying armature/field current? Didn't your EV have some type of "idle" circuit at one point? -Adrian _______________________________________________ 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/20131016/5da07b32/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)
