kdog
10 kW
Hi all
A friend has asked for some help with his ebike (cause I put it together for him) it's a 500w DD hubby with a KT controller and LCD display. I built the battery for him which is a 13s6p.
All pretty standard, it's been going well for 3500 k's but he's had a series of failures in a week (which I'm suspicious are related).
I got it going for him and he took it out for a ride, started off ok, then he did some heavy regen braking down our hill. Then no power and cogging. Damn it!
Motor's fine no shorts.. But all phases cog when connected to controller
Taking the controller out it seems that all phases are shorted. I'm familiar ( but lack indepth knowledge )with testing fets.
Testing with my DMM I got this:
Battery + to all phases 0.00ohm
Battery - to all phases Aprox .45v drop
so am I correct in thinking...
That all fets are shorted but have intact body diodes, seems unusual to do ALL fets. The fets all look fine, there is no visual damage to the controller at all.
Is there some other process that could produce this result?
The controller still works in all other respects.
Cheers
A friend has asked for some help with his ebike (cause I put it together for him) it's a 500w DD hubby with a KT controller and LCD display. I built the battery for him which is a 13s6p.
All pretty standard, it's been going well for 3500 k's but he's had a series of failures in a week (which I'm suspicious are related).
I got it going for him and he took it out for a ride, started off ok, then he did some heavy regen braking down our hill. Then no power and cogging. Damn it!
Motor's fine no shorts.. But all phases cog when connected to controller
Taking the controller out it seems that all phases are shorted. I'm familiar ( but lack indepth knowledge )with testing fets.
Testing with my DMM I got this:
Battery + to all phases 0.00ohm
Battery - to all phases Aprox .45v drop
so am I correct in thinking...
That all fets are shorted but have intact body diodes, seems unusual to do ALL fets. The fets all look fine, there is no visual damage to the controller at all.
Is there some other process that could produce this result?
The controller still works in all other respects.
Cheers