Thanks Jerry and Zeke The D&D motor I purchased (now twice) was built for low speed torque applications,40% more torque than a stock motor. Mike has advised me they have customers that use these on carts to pull large boats out of launches, etc. It's massively powerful for a golf cart. It is a series wound motor and I replaced the shunt controller with the axe 7245. I don't have any metering on the controller other than I can hook up via serial via laptop to log throttle, volt and amp output and controller temps. I could limit output but Mike advised it should be set at 100%. The motor is actually doing a lot less work this year as I changed out the blower skegs for 4 small pneumatic wheels so it rolls much easily down the road. I'm not sure I can bench break in the motor with 12v as one end of the motor is held by a bearing on the golf cart transmission, it's a female spline. As mentioned it's been working flawlessly for 2 years without little heat. I used to check it regularly with my hand for temps, barely would get hot. Now the "H" rated insulation is melting!
Thank you!!! On Sat, Feb 21, 2015 at 11:16 AM, Zeke Yewdall <[email protected]> wrote: > Do you have any metering of motor current? I'm not familiar with how the > AXE controller works with a shunt motor as I've only used them with series > motors, but I imagine that if you are at low throttle, the motor current > could actually be very high, while the battery current is low. > > On Sat, Feb 21, 2015 at 7:36 AM, Dan Baker via EV <[email protected]> > wrote: > >> Hey folks >> >> I'm hoping someone can help me with my EV. My snowpig ( >> http://www.evalbum.com/4544 ) has suffered two drive motor failures in >> the >> past two weeks! I purchased a D&D 170-04-01 8hp torque motor two years >> ago >> to beef up my cart that I use to clear our dirt road for myself and >> our neighbors. It had ran flawlessly till now. My cart has been the >> first >> line of defense in keeping our road passable and this winter has been >> brutal but not much different than the others we have had. A couple weeks >> ago I noted some smell from the motor and then a sudden loss in power. >> Upon dis assembly, I found heat damage, notably 2 of the brush springs had >> melted. No idea if the brush springs were the cause of the heat or the >> victims of it. All my connections were tight and no heat damage could be >> found at the batteries, controller or motor terminals. So I called Mike >> and Jeff at D&D up, they were very helpful and I ordered a replacement, >> which is terribly expensive by the time this 61lb brute gets to my door >> with shipping. I verified my alltrax 7245 controller's programming and >> found that the turbo option was set, a field weakening option that gets a >> small increase in speed. My snowpig rarely sees full throttle as it >> trundles along clearing snow, the front MARS ME-1003 doing most of the >> work >> running the blower. I verified all the rest of the options as per Mike's >> instructions and put the cart back together. >> Well I had to travel for work this week and left the snowpig for my father >> to operate. We had two storms, the first one he had no issue but on the >> second it failed again! Upon inspecting I found the resting pack voltage >> was 50 volts in -6c weather (he had to abandon it on the side of the >> road). Upon dissection of the second motor I found one brush completely >> torn from the holder, it's metal casing in shards and lots of heat damage >> again! >> >> Was the second motor a dud? What else could be the cause? I'm not looking >> for blame, just trying to keep it from happening again. I have to once >> again go away next week and we will likely have yet another dump of snow. >> I'm going to try and make a motor of the two but I'm dismayed this may >> happen again ;-( If I get a motor functioning again, I'm going to hook a >> laptop to the AXE controller. and log a run but there isn't a lot of snow >> left to clear as it has become rock hard with freezing rain so the blower >> and cart won't see much load. >> >> Any help or ideas around keeping my pig running and our road passable >> would >> be much appreciated! >> >> Thank you >> Dan >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: < >> http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150221/7dbc12d9/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 -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150221/1997d1ce/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)
