> Yup, that was quite the brain fart sorry about that. Since nobody knows
> me here I'll risk further imbarrasment. It would be V/R wouldn't it?
> I calculated 120 amps from a measurement of .3ohms and 36 volts. When
> I locked the rotor and applied voltage, from a good distance away, I
> measured 643 amps. The armature and feild are connected in series.
> It was very exciting to actually measure the current but I don't think
> I'll ever do that again.
> How can I make a quick estimate of lock rotor amps for a series motor?


I would think the DC resistance you measured would be a good way of
determing the locked rotor current. I can't see how the current could be
any higher than V/R using the measured DC resistance. Did you check the
zero on your meter before measuring? 0.3 ohms might be your test lead
resistance.

Harold

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