[zbrozek]

Tomorrow I'll try replacing the shunt with a loop that I can use with my current probe. I understand the current paths that a motor controller enables at different parts of a switching cycle (I used to design really big motor controller for a living). But no matter what, deltaI=V*t/L, and that should be a triangle.

And yes, I have the equipment to directly measure inductance of the windings. I have no doubt that current will continue to flow during the off time, my problem is what I see at the output of the shunt amplifier during the on time. It shouldn't be square.