Hi everyone,
I'm having trouble diagnosing issues on my current upgrade.
About the bike: motor is a MXUS XF19r was origionally running it on a KT 12 mosfet 40a controller with a 15s battery for approx a year. Bike used for commuting, pulling trailer with pretty heavy loads, and errands. All on street no bike paths and no recreational riding ( for recreation I prefer my push bikes). Controller went bad burnt up a mosfet presumably from beating the snot out of it with loaded trailer.
So I decided to go with a 20S and a KT 18 mosfet 50a controller. Got everything installed went for a ride and it was slow (struggled to get to 35mph, it.) Glancing at display power is bouncing from 800 to 1700w ( so around 27 amps max no were near the 50amps). Figured the BMS was bad so I bypassed it, same thing.
Put it back on the bike stand and ran it with no load. It will spin up to full speed, but if you keep it there for like 20 seconds sound changes like its bogging down with a load and power goes from 440W to almost 900W unloaded.
It's the strangest thing I've seen. I'm at a loss for what it could be. Is it possible for the new controller to be bad?
I'm having trouble diagnosing issues on my current upgrade.
About the bike: motor is a MXUS XF19r was origionally running it on a KT 12 mosfet 40a controller with a 15s battery for approx a year. Bike used for commuting, pulling trailer with pretty heavy loads, and errands. All on street no bike paths and no recreational riding ( for recreation I prefer my push bikes). Controller went bad burnt up a mosfet presumably from beating the snot out of it with loaded trailer.
So I decided to go with a 20S and a KT 18 mosfet 50a controller. Got everything installed went for a ride and it was slow (struggled to get to 35mph, it.) Glancing at display power is bouncing from 800 to 1700w ( so around 27 amps max no were near the 50amps). Figured the BMS was bad so I bypassed it, same thing.
Put it back on the bike stand and ran it with no load. It will spin up to full speed, but if you keep it there for like 20 seconds sound changes like its bogging down with a load and power goes from 440W to almost 900W unloaded.
It's the strangest thing I've seen. I'm at a loss for what it could be. Is it possible for the new controller to be bad?