nutsandvolts wrote:With power off, I have continuity between neg battery lead and neg motor lead.
What do you mean in one direction?
Sounds like toast.nutsandvolts wrote:I thought a continuity test was not directional, but okay I tested both the neg and pos battery leads to motor leads, with the power off, I get continuity on both leads, both directions. So one or more FETs are probably blown?
If one were stupid enough to want to attempt this again (76V), with different FETs and main caps, what FET would be a good candidate?
TylerDurden wrote:@Link... I believe the brushies work on the negleg.
Link wrote:Might depend on the controller. When I opened up my last-gen e-crazyman controller, the battery negative and the motor negative shared the same solder point.
And yeah, you might as well upgrade it while you're at it.
gmouchawar wrote:only one MOSFET could be bad and you will get those symptoms. The trick is to know which one or do it by luck.
I apply power in the correct polarity to put my finger on the MOSFETS. The one that heats up is the bad one.
Currently the best choice for MOSFET is IR4110. If you need help in replacing them let me know.
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