The video above was after several fets were replaced.
so shortly after buttoning up the bike - I zipped down the street to run an errand and @ 1.2 miles the controller pooped the bed again.
18X4115 Lyen, paramters:
Bike is seeing no more than about 48 amps max, so I am guessing the phase amps are what is causing the issue with the FETS. I spent a good deal of time reading about my 5303 and their infamy for chewing up controllers, but all of these instances were with a 5303 in a 26" wheel, most at hogher voltage. I figured that my nominal voltage of 74 @ 24s A123 cells, combined with my 20" wheel set up would keep me safe.
The last few days I have been sifting through 5303/controller threads on the site here. I am kinda stumped as to what direction to head next. Any input would be appreciated.
I am not sucking amps out of the batteries - the controller doesn't get warm, and the hub motor is nly slightly warm after hard use. Both times the controller failed onme now I was at partial throttle, not WOT.
What do you guys reckon I should do here? At the very least I am pretty dead set on going with an 18X4110 Lyen, but what about my almost sure-to-fail-again 18X4115?
Should I just consider that my project controller and start planning to hange all of the fets in it?
What about a 24 fet? I am not pulling mega - volts, remember, but inductance, apparently, is a bitch with my 5303......