Re: [CAD_CAM_EDM_DRO] Re: 3 phase motor math

I think that you can measure it with a dual trace scope.
I believe that the inductance changes with the frequency.
I belive that most inductance formulas are for Sine Waves.
bob mcknight

rainnea wrote:

>Thanks for the explanation Jon,
>
>I've seen inductance come up before in discussions of brushed DC
>motors and Geckodrives. How difficult is it to measure motor
>inductance ?
>
>

Very simple, actually, if you have an inductance bridge. Very
hard, otherwise. I have a GR-1650, there was also an older GR-650,
that had tubes in it! There may be some DVMs that have inductance
measuring capability.

(The General Radio (GR) bridges also measure capacitance, Q and
milliohms, so they are good for a lot of these odd needs.)

Jon



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