Other Parts Discussed in Thread: TIDA-00366
I have designed my own PCB similar to TIDA-00366 using the F28035 microcontroller instead of the F28027. I've run through all the levels in HVACI_Scalar completing Level3. I've started running through the levels in HVACI_Sensored and currently have an issue with the current feedback reading for Phase U. (Chips for Phase V and W feedback circuits haven't been populated yet.) Originally I was using 0.005 ohm shunt resistors but I wasn't able to detect any voltage across it using a 1HP induction motor. I swapped the 0.005 ohm resistors out for 0.100 ohm resistors and now have a detectable sine wave on my oscilloscope that seems to behave as I would expect oscillating around 1.65V. When I plot the Clark1. As data on a graph in CCS, I get the following graph:
What would cause this oscillation offset?