hi, im new electronics and stuck with this: a while ago i got a razor e300 scooter off ebay. (yes i know better...) long story short it would cut out under load. i "fixed" it by buying another speed controller but really want to understand how motor control circuits work. my multimeter has a diode test voltage of 2.6v which aac tells me isnt enough to switch the fets which as far as i can tell arent shorted open. i measured the resistance across gate source and drain. there was some light smoke residue around one of the fets but i wiped it off but its been in my rainy day bin for 6months now. i cant see any damage through fire or otherwise to any part of the circuit now. it looks like a dual layer board which complicates things.
what i want to know is can you test a fet reliably when its still in a circuit and what would be a best guess as to why it would cut out at approx half load? its a black heatsink esc and there are only 2 fets, it controls a brushed motor. again i cant see anything on either fet to suggest theyre dud.
thanks
ps i have one of those kids spring terminal project electric kits, could i rig this up to test fets somehow?
what i want to know is can you test a fet reliably when its still in a circuit and what would be a best guess as to why it would cut out at approx half load? its a black heatsink esc and there are only 2 fets, it controls a brushed motor. again i cant see anything on either fet to suggest theyre dud.
thanks
ps i have one of those kids spring terminal project electric kits, could i rig this up to test fets somehow?