I want to peak an LC circuit as the load changes. It's < 30 KHz and the inductor is approx 20 mH.
I've seen some patents for electrically-controlled inductors (one winding is the control winding) which changes the permeability of the core. But I've not found any such designs used or offerings on-line.
I would appreciate any constructive suggestions how I might go about this.
Janey
Not an inductor but use a gyrator?
go read some ancient books on magnetic amplifiers; Geyger & Storm are both very good.
this stuff is old. so old that it hasnt been mentioned in universities for decades (except for using mag-amp post-regulators on smps), so I wouldnt owrry about any patents.
Cheers Terry
"Janey"
** Be a hell of a lot easier to vary the drive frequency to bring the LC circuit into resonance.Just needs a detector to indicate when the voltage and current are in phase.
..... Phil
If that were the goal, yes. But I want to peak a given frequency.
How would one go about this detection?
J.
The basics of designing a saturable reactor is:
The inductance will be maximum with minimum control voltage, and vice versa.
Is this right?
Janey
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