brushless sensored motor getting hot with no load

[ferp420]

i have a vary old vary abused novak hd8 that all the sudden started getting hot once i noticed it and did alittle bit of testing it.gets hot with no load under minamal throtle

i thought the bearings were toast so i replaced them still getting hot

i am now asuming the sensor is toast

i found a guy parting out what looks like a new hd8 so i was hoping to get the windings and sensor he also has the rotor but i dont think i need it

anyway heres my question is there a way to test these componints with a simple multi meter before i go all out and buy the parts i dont need

i would rather not toss it cause well novak isent around anymore and i used to go to there factory and get free stickers when i was a kid

 

[DrIsotope]

Try a different sensor cable first. If the behavior is exactly the same, it's extremely likely that the Hall sensor is going. When it's gone, if basically won't work with the cable plugged in. That's provided that it doesn't heat up when running sensorless. If it gets hot in both states, the rotor is a goner, and you're looking at buying a new motor. I had a Speed Passion TC motor fail in almost the exact same way-- and the heat inside is WAY higher than the outside, so it effectively cooked the magnets before I could even tell it was heating up.

I sold a Novak Switch module a few years ago for almost triple what I had paid for it. I think I still have an old XRS speedo somewhere. But in the "brushed is the only thing that exists" era, I was more of a Tekin guy. Still have a G10 in a box somewhere-- the last of the "real" Tekin ESCs.