I know the manual doesn't specify, but usually you need to have your foot on the brake before putting a car in gear. Maybe they missed this detail in the manual.
On Tue, Jul 24, 2018, 10:35 AM ptandjb Frontier via EV <[email protected]> wrote: > To All, > > > > I am reposting from last year asking for any available advice as me and my > cousin continue to try to help get my uncle's EV project started in 1984 to > a successful conclusion. > > > > I am still trying to help my uncle realize his main bucket list item while > there is still time. He has been working off and on for over 30 years to > slowly build an electric car. When he attempted to power it for the first > time last year the controller failed to trigger the contactors to send > power > to the motor. He said all he wants to do is to drive this car at least once > before he dies. He gets up every day and puts on his union machinist suit > and goes to work in a construction company warehouse in Ludlow > Massachusetts > doing maintenance and machinery repair. He has started talking about > retiring and would then need to find another location for the EV project > car > if it is not yet finished. So I was asked to come take a look. In my > distant past I have a degree in electrical engineering and have experience > with SCR controlled injection molding machines so theoretically I should > technically understand all documentation and pretty much understand how > things should work. > > > > > > The car chassis was hand built: > > > > http://ptandjb.com/eddiesEV1/carfront0491.JPG > > > > http://ptandjb.com/eddiesEV1/carside0490.JPG > > > > Overview of controller assembly: > > > > http://ptandjb.com/eddiesEV1/EV1fullview0483.JPG > > > > http://ptandjb.com/eddiesEV1/EV1closeup0485.JPG > > > > I had thought last year we had proven that the EV1-B controller was > defective and went back last month to try to disassemble and test the > controller. We repeated our original investigation, with SEAT and BRAKE > switches bypassed and KEY, FWD, and ACCEL switches appropriately set there > was no contactor activation. Looking more carefully at the documentation, I > realized that I had not considered STATIC RETURN TO OFF and PULSE MONITOR > TRIP requirements, and could no longer conclude I had proven the controller > defective. I was confused as the exact process (see confusing manual > excerpts below). Because I was not up to speed on these requirements, we > called it a day and I came home to study documentation and try to figure > out > a way forward. An initial successful outcome would be sending power to the > motors in forward or reverse in START ACCELERATION mode. > > > > From the manuals: > > > > The control circuit is energized by closing the Key switch, Seat switch, > and > moving the Forward or Reverse lever to either position and then depressing > the accelerator, thus closing the Start switch. This applies power to the > control card and, if the "static return to OFF" requirement and the pulse > monitor trip requirement are satisfied, turns on the PMT driver, which will > close the selected directional contactor, completing the circuit to the > traction motor. The directional contactor is controlled by the directional > switch. > > * STATIC RETURN TO OFF - this built-in feature of the control requires > the operator to return the directional lever to NEUTRAL anytime he leaves > the vehicle and returns. If the Seat switch or Key switch is opened, the > control will shut off and cannot be restarted until the Directional switch > is returned to NEUTRAL. A time delay (0.5 seconds) is built into the Seat > switch input to allow momentary opening of the Seat switch. This same delay > requires the Directional switch not be closed until both the Key switch and > the Seat switch have been closed for 0.5 seconds. > > * PULSE MONITOR TRIP - this function contains three features: The look > ahead, the look again, and the automatic look again reset. > > If 1 REC (the main SCR) is shorted or lA is welded. PMT will look ahead and > prevent F or R from closing if either condition exists. > > If 1 REC fails to commutate, or if lA power tips remain closed when they > should be open, the control will open F or R contactor. PMT will then look > again by testing for a fault and, if none, reclose F or R. If the fault > still exists, the F or R will reopen and remain open. > > If lA closes before a second commutation failure, the look again counter > will automatically reset. This eliminates the inconvenience of resetting > the > PMT with the key switch if the tripping is due to random noise. > > When the PMT circuit prevents F or R from closing, the PMT circuit can be > reset only by opening the Key switch. > > > > I have uploaded various relevant files from various sources to my web > domain > in directory where they can be viewed or downloaded: > > > > http://ptandjb.com/eddiesEV1 > > > > EV-1 Spec1.jpeg 1st page > original EV-1 controller spec sheet > > EV-1 Spec2.jpeg 2nd page > original EV-1 controller spec sheet > > EV1.pdf EV-1B > Troubleshooting Manual & Parts Lists (59 pages) > > EV1WireDiagram2.docx EV-1B Wiring Diagram as > Word Document > > EV1WireDiagram2pdf.pdf EV-1B Wiring Diagram as > PDF > Document > > EV1closeup0485.JPG EV-1B close-up view > > EV1fullview0483.JPG EV-1B full view > > carfront0491.JPG front view car > chassis > > carside0490.JPG side view car > chassis > > ev1maint1.pdf GE EV-1 > Troubleshooting and Repair Manual part 1 (22 pages) > > ev1maint2.pdf GE EV-1 > Troubleshooting and Repair Manual part 2 (19 pages) > > ge_ev1_rs_notes.pdf Roger Stockton's > EV-1 > SCR DC Motor Controller Notes > > ge_ev1_rs_notes.docx Roger Stockton's EV-1 SCR DC Motor > Controller Notes (edited) > > > > > > Before our next trip to Ludlow to further evaluate the EV1-B, I have some > questions: > > > > Is there anyone familiar with the GE EV1-B controller willing to talk to me > on the phone and/or correspond by email and/or make a visit to see the car > to render technical assistance? All reasonable expenses would be covered. > Also Facetime video call assistance is an option. > > > > Is there a way satisfy/bypass/eliminate the PMT requirement to rule that > out > as a problem? I have trouble figuring how to understand its function. > > > > If we prove a failure of the EV1-B controller does anyone have experience > working on this unit? > > > > If demonstrated defective, are there repair options available sufficiently > local to Ludlow Massachusetts that can visit the site or are there sites we > can bring or ship the EV1-B controller? A typical forklift repair > technician > may simply want to replace the EV1-B unit and not troubleshoot faults > inside > the unit. > > > > Is there a source for spare parts/technical support for the EV1-B > controller > if we get inside the box? > > > > Thanks in advance for help, if fortunate to succeed there will be a YouTube > video of a successful outcome. This email will be cross posted at > diyelectriccar.com and evdl.org. > > > > Paul Traceski > > > > > > > > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20180724/5eec270b/attachment.html > > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Please discuss EV drag racing at 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/20180725/a2c8fb89/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
