Inductor saturation

[Ghydda]

A few years ago I built a small life saver. I basically were getting tired of not being able to properly estimate or easily measure the performance of inductors at high flux rates - i.e. approaching core saturation and even characterize them beyond the saturation point.

01 - The user interface. Not much going on.
02 - Here you see a coil about to undergo test.
03 - The terminals for connecting the DUT.
04 - The innards of the box.
05 - The control circuitry.
06 - The control circuitry from another angle.
07 - The control circuitry, more specifically the floating power supply for the MOSFET driver.
08 - The control circuitry, the button in the middle means go.
09 - The resulting current is passed though some shunt resistors and the signal is tapped and gets fed into a scope.


I haven't any schematic of the thing (well it's probably in one of the countless piles I keep), but I suppose it wouldn't take long to reverse engineer it. Certainly faster than digging up the original. Now that you know what the thing looks like on the inside is anyone interested in the schematic and perhaps some snaps from the scope of the thing doing its thing?




PS. Is there somewhere a how-to on getting the pics in-line with the text as seen on various other threads?

[Harvs]

I've done a similar thing but much simpler. Just using a lab supply for the floating supply and an AWG to generate the pulses.  So basically just a board with a mosfet, shunt and diode.

However, I'd be interested in the schematics.  It's always interesting to see how people have solved the various problems in a design like this.

Cheers

BTW, to embed photos you need to use an external photo host like photobucket, then they provide an image link you just copy and paste into the text, which when posted shows up as the pic.