Simon,
Quote"
(Use photoshop and draw a line from the start to the end of the sawtooth ramp and you can see how it is decreasing in slope.)
If the TX current was a perfect linear ramp, even the fast target should be still increasing and approaching a constant level, and naturally way ahead of the slow target.
Pretty sure I got that right..."
Attached is a sim, as well as a .jpg where the TX coil TC is 20ms. We can assume that during the first 100us the TX ramp is very close to linear.
Look at the 15us target eddy currents. The eddy current maximum during TX ON, seems to be governed by the TC of the target. After 5 TC, we can see very little increase.
Tinkerer
Quote"
(Use photoshop and draw a line from the start to the end of the sawtooth ramp and you can see how it is decreasing in slope.)
If the TX current was a perfect linear ramp, even the fast target should be still increasing and approaching a constant level, and naturally way ahead of the slow target.
Pretty sure I got that right..."
Attached is a sim, as well as a .jpg where the TX coil TC is 20ms. We can assume that during the first 100us the TX ramp is very close to linear.
Look at the 15us target eddy currents. The eddy current maximum during TX ON, seems to be governed by the TC of the target. After 5 TC, we can see very little increase.
Tinkerer
Comment