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From: berryh@udel.edu (John Berryhill)
Newsgroups: sci.electronics
Subject: Re: Inductance Measurement (Big V)
Message-ID: <2621@nigel.udel.EDU>
Date: 26 Oct 89 14:59:06 GMT
References: <9450@pyr.gatech.EDU> <0ZFW62y00XcRM3bGAl@andrew.cmu.edu>
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In article <0ZFW62y00XcRM3bGAl@andrew.cmu.edu> jk3k+@andrew.cmu.edu (Joe Keane) writes:
>Then look at the voltages across both on a scope, making sure you don't
>ground something that isn't.  Given the ratio and phase angle between
>the two voltages, you can figure out both the inductance and resistance
>of your inductor at the given voltage and frequency.  I assume of course
>that the capacitance is negligible.

Why make it tough on yourself (and risk damaging the scope with big AC)?

If you have an AC voltmeter and ammeter, just measure V and I to get the
magnitude of the impedance Z.

Calculate L from |Z|^2= R^2 + w^2 L^2

where w=2(pi) 60 Hz
--
							      John Berryhill
"Tasty Snacks in Cellophane Packs"         143 King William, Newark DE 19711