Hi everyone,
I recently made an adjustable inductor using a E core and coil. I adjust the inductance by gapping the core using screws and nuts which I mounted to it. When the core is tight I get an inductance of 5H. The problem is when I turn the 10-32 screw just 1/2 turn the inductance changes by an entire Henry (at that point the gap is only about 2 thousandth of an inch!) The core I am using has an Ae of 225mm^2, a Iu of 2300 and an AL of 3100.
I need the inductance change to be much more precise. I was hoping to get something that I could change the inductance by just a few mH per turn. How can I get more precision out of the inductor?
I recently made an adjustable inductor using a E core and coil. I adjust the inductance by gapping the core using screws and nuts which I mounted to it. When the core is tight I get an inductance of 5H. The problem is when I turn the 10-32 screw just 1/2 turn the inductance changes by an entire Henry (at that point the gap is only about 2 thousandth of an inch!) The core I am using has an Ae of 225mm^2, a Iu of 2300 and an AL of 3100.
I need the inductance change to be much more precise. I was hoping to get something that I could change the inductance by just a few mH per turn. How can I get more precision out of the inductor?
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