cell_man
100 kW
Best of luck with the build Mark, 60V on the Mac motor should be nice.
That's impressive John, it must have gone like a shower of shit running upwards of 3000w into it!johnrobholmes said:I ran my MAC on 18s lipo and it broke the gears when I hit a bump at speed. A metal gear should solve that. I was running 45a
Mark_A_W said:I'm thinking about taking the gear to a gear manufacturer, and seeing if there is something inbetween nylon and steel. Perhaps cloth-reinforced bakelite, or a glass reinforced plastic.
johnrobholmes said:Keep the banter out of this awesome build thread, I pruned a few posts of dribble.
Awesome build here. I ran my MAC on 18s lipo and it broke the gears when I hit a bump at speed. A metal gear should solve that. I was running 45a current limit and I never overheated the motor, but I am about 150lb rider. Gotta say it was one helluva fast hub motor!
What do you think your final weight will be?
johnrobholmes said:The vibration is normal at the lower speed, right until you hit about 25kmph. An interaction between switching frequency and chopping frequency best I can tell.
johnrobholmes said:I haven't experienced shudder with my setup, it was more of a growl.
johnrobholmes said:Looks like mine is a MAC as well, but I am waiting for some motors from them direct to know for sure. Running 12 fet infineon on 18s lipo 45a limit. Did you adjust your limits on the controller?
AussieJester said:Good too hear its running Mark how far off is the custom battery enclosure? Hope you can
sort the 'shudder' issues out to, is it really a big problem though for on road riding? I gather
though with the suspension on this bike your planning on some off road excursions too?
KiM
Hyena said:Is the shudder problem the same one that were reported with BMC's on infineon controllers (I remember reading somewhere people were getting better results on the analog controllers than the digital ones) ?
55 km/hr isn't too shabby - so that's on about 63-64 real world volts ? 18S lipo will sit above 70v for alot of its discharge so you'd probably expect around 60km/hr. Have you noticed what sort of current its drawing WOT along the flat ?
I'm going to try one of these MACs too, I'm hoping to get similar performance to my modded GM hub but while drawing less current.
Mark_A_W said:(Black? Blue? Paint needs to be robust, but not rough or it will grind my leg. Ideas welcome).
I can't remember if the shuddering was the issue or something else, I just remember there being certain issues with the BMCs and different controllers.Mark_A_W said:Gotta link to any info on the BMC issue? Same motor, same controller.