How much electrical resistance does it show from one side of the stator to the other on same tooth?
It’s hard to get a solid reading but hoping some people post what motor they have and what resistance it shows. Why manufacturers go through the trouble of making laminations but then don’t insulate them well from each other, I don’t know
All the stators I have of various sizes and 50-60mm tall show between .2 and .8 ohms. I’m trying to find out if this horrendously low resistance is typical.
Maybe this is why high voltage destroys our motors
Why u say high voltage destroys?
The low resistance of the stator results in eddy currents and heating from high frequency. It seems these motos we use aren’t nearly as insulated as ones made for industrial use
the conductor cares not what voltage runs through it
insulation does
Hoping at least a couple people try this. It’s as easy as putting a multimeter to each side of a motor.
I will try it after Easter
I was thinking about double ground fault but you can have other problems too
Edit: Greek Easter is april 12 
Easter? That was three days ago. But good to hear none the less
That’s interesting.
maybe u haven’t gotten past the epoxy. Try digging in
It seems one aspect of performance that no one looks at and has a huge effect on performance. It’s the difference between having a block of steel that’s an induction oven or a motor.
All my stators seem to suck in relation to the standards. I bet yours sucks too
It seems the voltage that’s produced in the stator by the switching magnetic field, that makes the eddy currents, is very small and even the very low resistance of common “hobby grade” stators we use is enough to keep the eddy currents very low. The stators could be better but based on ohms law and the minute voltages produced there’s little eddy currents generated.
A no load test is a revealer but vesc tool data isn’t accurate
Interesting tangent dude, might be more critical in high kv motors? I would need to dig through the calculations to see but interesting to think about.
As u know higher kv generally results in higher erpm and more eddies.
The motor constants Km is one of only three motor constants (Kv and Kt) and none incorporate iron losses… and while the hysteresis part of those iron losses is very predictable..eddies are both exponential and could potentially be a much bigger loss based on how well the stator is made and it’s inter-laminate resistance
Ideally a motor would be run with half copper losses and half iron and the stator construction could be a huge factor… but the half-assed way they’re done is adequate
