When you flow current from the source into the 3-phase load, by motor convention, the current is positive.
However, based on how the sense resistor is hooked up to the difference amplifier, the feedback voltage is negative.
I believe we can simply swap + and - terminals on the diff amp to solve this--then, positive current would result in a positive voltage feedback signal. I think this makes more sense.
When you flow current from the source into the 3-phase load, by motor convention, the current is positive.
However, based on how the sense resistor is hooked up to the difference amplifier, the feedback voltage is negative.
I believe we can simply swap
+and-terminals on the diff amp to solve this--then, positive current would result in a positive voltage feedback signal. I think this makes more sense.