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Inductance is a function of frequency. If the oscillator of the circuits is in the range of 10khz to 20khz, then my reading of test of coil in the 120hz and 1khz have a different value. The units described here all work in the 120hz or 1khz and we need to do a chart L vs F to find the behavior or this coil at the frequency my circuits work. The manufacturer use 1khz as a common value, however this coil at 10 or 15khz will have a value different.
The best meter is to do a traditional measurement with a oscillator in the frequency used, a scope and a rms meter to measure and with the formula find the L, Q and D of the coil using excel to do simulations at differents coil windings, diameter or wire size.
Is inductance really a function of frequency, or does it just mean we have not modeled the inductor correctly (as a more complex circuit of passive elements)?
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