back to current sensing problems

This is the week to sort out the current sensing problems.

This is the signal that I am getting from the IR2175 at the moment:

Settings are: 30kHz switching, and 30% duty cycle. Speed is 55Hz.



just as a check, detemine the frequency:

period approx 2.5 * 2.5 * 10^-6 sec

therfore frequcncy = 1/ (2.5 * 2.5 * 10^-6) sec

= 160 kHz

so I am measuring the correct signal.

Now I had better check with the opto out again - just to be sure that it is the chip and not the load.



as before, this gives no real improvement.