RVD
1 kW
I have a fat bike with a MXUS 3000 watt hub motor. It was working well but on my last ride, I ran into a problem.
I live on the top of a pretty big and steep hill (around 10-15% grade) but it's relatively short (maybe 200 meters or so). Most hub motors have trouble going up but my bafang 750w mid-drive bike works well. This bike has a pretty powerful hub motor so it's able to make it up the hill although at the end of the hill it does slow down a little bit. I'm running the mxus 3000 watt motor with a 60 amp sine wave controller and 60v 20ah battery.
On my last ride, I was riding to work so I was going down the steep hill. I have regen turned on so I was going down the hill in regen so the motor was having some periodic grunts and such but seemed normal to me.
At the bottom of the hill, when I accelerated instead of the smooth acceleration that I normally get, it sputtered, vibrated, etc. I seemed to be ok for a second but then would go back to not working, etc. Sometimes the motor would not respond at all to throttle.
I turned back and of course the bike was not able to make it up to the steep hill so I ended up walking the bike up the hill and going back home. On the flats, it would sputter a bit but sort of make it like it's crippled but I walked it most of the time.
Tonight I took a closer look and took all of the wires apart and noticed that the 5 phase wires looked fine on visual inspection. The 3 hall wires (blue, yellow, green) on anderson power pole looked ok but when I tried to pull them apart, the blue and yellow came apart easily as expected but the green was fused together. I cut the wire to get it off to take a closer look and found that the housing had melted. The underlying wire looked ok visually.
I'll try putting on a new anderson tomorrow but do you think that maybe I was just putting too many amps through those andersons? I didn't install this but assuming these are 45 amp connectors and sometimes I take the bike up to around 3000 watts, with a 60v battery that would be 50 amps. I rarely do that though and it's just peak so never sustained but I have sustained it at the 1000-2000 watt level a lot.
Any other thoughts? Bad controller? Thx!
I live on the top of a pretty big and steep hill (around 10-15% grade) but it's relatively short (maybe 200 meters or so). Most hub motors have trouble going up but my bafang 750w mid-drive bike works well. This bike has a pretty powerful hub motor so it's able to make it up the hill although at the end of the hill it does slow down a little bit. I'm running the mxus 3000 watt motor with a 60 amp sine wave controller and 60v 20ah battery.
On my last ride, I was riding to work so I was going down the steep hill. I have regen turned on so I was going down the hill in regen so the motor was having some periodic grunts and such but seemed normal to me.
At the bottom of the hill, when I accelerated instead of the smooth acceleration that I normally get, it sputtered, vibrated, etc. I seemed to be ok for a second but then would go back to not working, etc. Sometimes the motor would not respond at all to throttle.
I turned back and of course the bike was not able to make it up to the steep hill so I ended up walking the bike up the hill and going back home. On the flats, it would sputter a bit but sort of make it like it's crippled but I walked it most of the time.
Tonight I took a closer look and took all of the wires apart and noticed that the 5 phase wires looked fine on visual inspection. The 3 hall wires (blue, yellow, green) on anderson power pole looked ok but when I tried to pull them apart, the blue and yellow came apart easily as expected but the green was fused together. I cut the wire to get it off to take a closer look and found that the housing had melted. The underlying wire looked ok visually.
I'll try putting on a new anderson tomorrow but do you think that maybe I was just putting too many amps through those andersons? I didn't install this but assuming these are 45 amp connectors and sometimes I take the bike up to around 3000 watts, with a 60v battery that would be 50 amps. I rarely do that though and it's just peak so never sustained but I have sustained it at the 1000-2000 watt level a lot.
Any other thoughts? Bad controller? Thx!