If you follow Bruce at RC Model Reviews on youtube, you might have seen this before:
I have 4 motors I bought at Flite Fest and when I went down in the beans and forgot to disarm I smoked the ESCs (actually my quad caught fire, it was awesome!)
Anyway, I replaced the ESCs at home and fired them up. just on the test bench with no props I had the ESCs blowing FETs and shooting sparks. Not good.
So I am testing the motors like Bruce explains and none of them have all three matching. Problem is I am not sure how close they are supposed to be. Is within .1 uH acceptable? .01?
Motor 1:
AB 10.22
BC 09.97
AC 10.13
This one has the furthest separation (AB-BC) and also the highest measurement in coil AB. Most likely it's toast.
Motor 2:
AB 10.02
BC 10.00
AC 10.09
These are all so close that if I didn't see that 10.22 on motor 1 I might think it's ok. Are all three just evenly shorted?
Motor 3:
AB 9.71
BC 9.70
AC 9.80
Same here, but obviously wrong compared to motor 1. So all three became evenly shorted maybe?
Motor 4:
AB 10.05
BC 10.11
AC 10.03
So close to motor 2 and so close to each other that again I would be tempted to call this one good, except I don't know how close they need to be. Also, that 10.22 on motor 1 makes me think this motor is also evenly broken.
I have 4 motors I bought at Flite Fest and when I went down in the beans and forgot to disarm I smoked the ESCs (actually my quad caught fire, it was awesome!)
Anyway, I replaced the ESCs at home and fired them up. just on the test bench with no props I had the ESCs blowing FETs and shooting sparks. Not good.
So I am testing the motors like Bruce explains and none of them have all three matching. Problem is I am not sure how close they are supposed to be. Is within .1 uH acceptable? .01?
Motor 1:
AB 10.22
BC 09.97
AC 10.13
This one has the furthest separation (AB-BC) and also the highest measurement in coil AB. Most likely it's toast.
Motor 2:
AB 10.02
BC 10.00
AC 10.09
These are all so close that if I didn't see that 10.22 on motor 1 I might think it's ok. Are all three just evenly shorted?
Motor 3:
AB 9.71
BC 9.70
AC 9.80
Same here, but obviously wrong compared to motor 1. So all three became evenly shorted maybe?
Motor 4:
AB 10.05
BC 10.11
AC 10.03
So close to motor 2 and so close to each other that again I would be tempted to call this one good, except I don't know how close they need to be. Also, that 10.22 on motor 1 makes me think this motor is also evenly broken.