Second run of the night. 8.2 miles, going back and forth on a flatish section of the highway (still obviously not flat, because I could go way faster one way than the other). Goes 45mph at times :) Down 32 amphours, so around 2kW. So, still around 250whrs/mile. There is something rubbing in one front wheel (dragging brake maybe?) so I can probably improve that. I haven't even checked the tire pressure, either. When I first started out, it would pull 230 battery amps. As it warmed up, that dropped and dropped till finally, it would only pull 80 amps from the battery. The controller is getting quite hot -- no heat sink or fan or anything on it, so not surprising. Battery voltage never dropped below 60 volts under load, though the load did keep decreasing..... parked it for 30 minutes, and it was back to being peppy, even before recharging. Looks like the next order of business is to put a heat sink and fan on the controller. I do have an analogue ammeter that I could put on the motor side to show motor amps as well, if I find another shunt for it.
I did find that the cable to the S2 terminal of the motor was loose, and getting very very hot under the 230 battery amps (probably higher motor amps) as in I could smell it while driving, and it was blackened around the terminal. I need to look at it in the light and see if it got damaged -- I tightened it back up but it was too dark to see well, and I'm not sure if the plastic bushing melted where it goes through the motor casing. On Wed, Jul 24, 2013 at 6:28 PM, Zeke Yewdall <[email protected]> wrote: > Update -- got the new Elcon 1200 watt charger in, and some actual circuit > breakers and such, instead of just lots of wires bolted together. Got the > Xantrex E-xpert Pro battery monitor as well, and have some actual run data > now. > > Took it for a 4.9 mile drive, all dirt road and lots of hills both ways > (in case it died, so I wouldn't be stuck on the highway, and it doesn't > matter if I'm going 5mph on the dirt road up the hills). > > According to the monitor, I used 20AH, which at about 62 volts (what the > batteries were sitting at most of the time under load), is 1.24 kWh, so > around 250wh/mile from the batteries -- I don't consider that too bad for > dealing with hills on a dirt road. Not having regen was painful (mentally) > -- riding the brakes all the way down a hill, then crawling up the next one > :) > > Peak amps was about 200, and batteries were sagging to about 60 volts > under that load. Popping back up to 69 to 70 volts almost immediately when > load removed. On one of the steeper hills, it would not go over about 100 > amps -- controller (Altrax 450) was hot to the touch, and so was the motor, > when this happened. Battery voltage was around 62 volts under this load. > I wonder if the Alltrax was current limiting for temp -- this was near the > end of the drive, and towards the beginning it seemed happy to do more like > 160 to 200 amps when you really pushed it. > > The monitor said I was down to 33% battery capacity after taking out only > 20AH -- puekert is obviously killing me. 12 volt AGMS, and I told the > monitor they were 80AH instead of 100AH that they claim (since they are not > new). http://www.npstelecom.com/pdfs/Dyn_UPS/UPS_12-370.pdf > > Question on the PB-6 throttle..... is it good for that to be getting wet > all of the time... because it is, being in the old VW bug engine > compartment in back. Rain drips right down on it. > > It's on the charger now, and after dinner I'll take it out for another > spin on flatter ground (the highway) since I've got a little more faith in > how it runs now. > > Topography of the run was dropping about 440 feet over a mile, with the > steepest section being a little over 10% grade, rising 100 feet over 3/4 > mile, then dropping 80 feet over 3/4 mile, then turn around and run the > opposite way. Total climbing = 620 feet vertical. > > Z > > > > > >> >>> On Thu, May 23, 2013 at 9:43 PM, Zeke Yewdall <[email protected]>wrote: >>> >>>> According to the specs, the motor is from D&D, and is 12.28" long x >>>> 6.7" diam, and weighs 62 lbs. >>>> >>>> If it were me, I'd probably go with the AC-35 or AC-50 from HPEV's... >>>> I like the specs on those, and what I've been hearing about their >>>> performance. >>>> >>>> >>>> On Thu, May 23, 2013 at 5:49 PM, Lee Hart <[email protected]>wrote: >>>> >>>>> On 5/23/2013 4:18 PM, Danpatgal wrote: >>>>> >>>>>> Lee Hart wrote >>>>>> >>>>>>> Is the 6.7" series DC motor enough for this heavy of a car? >>>>>>>> >>>>>>> The L91 in my LeCar is more than adequate to do 70 mph. >>>>>>> >>>>>> >>>>>> You don't actually go 70 in your LeCar, do you ? ;) >>>>>> >>>>> >>>>> It takes a while to get up to 70 mph, but it does get there. :-) No, I >>>>> don't normally drive it over 55 mph, as none of the roads around here have >>>>> posted speed limits that high. >>>>> >>>>> Note that I don't have the stock Lectric Leopard Prestolite 48v motor, >>>>> but instead an ADC L91. I have a Curtis 1231C controller. I also had a >>>>> 132vdc pack at the time of the 70 mph speed run. It's at 120vdc now. I >>>>> haven't tried to see how fast it will go now. >>>>> >>>>> >>>>> I also have the L91 in my LeCar, I've maxed out at 65 (once), and >>>>>> with more >>>>>> than 250 amps (at 120v) >>>>>> >>>>> >>>>> Odd. Mine draws about 70 amps at 50 mph, 100 amps at 60 mph, and 150 >>>>> amps at 70 mph. >>>>> >>>>> >>>>> I've been happy with it in the small vehicle - it's no tire burner, >>>>>> but I >>>>>> generally keep up with traffic. >>>>>> >>>>> >>>>> Same here. The L91 is no racing motor, but it is decent for an >>>>> around-town car. >>>>> >>>>> For a small car like a Beetle, to get 50-60 miles range with >>>>>> >>>>>> lead, you've got to have 1000 lbs of lead, or MORE. >>>>>> >>>>> >>>>> I'd say that's about right. John Bryan was getting that kind of range >>>>> with his Karmann Ghia with 16 Optimas (about a 900 lbs pack), but he was >>>>> very good at keeping his rolling resistance low. >>>>> >>>>> >>>>> To me that's not worth the weight performance hit, space requirements, >>>>>> hassle to keep watered, worse winter sagging, Puekert effect and short >>>>>> pack life, compared to lithium. >>>>>> >>>>> >>>>> That may all be true to some extent. There are ways to deal with all >>>>> these issues. However, I have gotten 15 years and three lead-acid packs >>>>> for >>>>> less than it would have cost me for lithium. And I don't know if the >>>>> lithiums will actually have lasted that long. >>>>> >>>>> I live in a small town, and lead meets my driving needs. So I'm >>>>> content to let others go first! :-) >>>>> >>>>> >>>>> If I had another $5k I'd have replaced the motor and controller and >>>>>> put in >>>>>> the HPEVS AC50. Perhaps in my next build (if it ever happens) or >>>>>> upgrade >>>>>> #2. >>>>>> >>>>> >>>>> More money = more performance and better range. Each person just >>>>> needs to decide how much he needs, and is willing to pay. >>>>> -- >>>>> Opportunity is missed by most people because it is dressed in overalls >>>>> and looks like work. -- Thomas A. Edison >>>>> >>>>> -- >>>>> Lee A. Hart, >>>>> http://www.sunrise-ev.com/**LeesEVs.htm<http://www.sunrise-ev.com/LeesEVs.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> >>>>> ) >>>>> >>>>> >>>> >>> >> > -------------- next part -------------- An HTML attachment was scrubbed... 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