Part Number:DRV8301-HC-C2-KIT
I have a high-current motor drive application (up to 50A into the supply). The DRV8301-HC-C2-KIT does not include InstaSPIN-FOC, so I have plugged in an F28069M control card and been able to successfully interface with the motor and drive board using some modified code and the projects. I've updated the user.h files with various tuned motor parameters and made sure the current and span levels are sufficiently high, testing values between 40A and 80A via these variables USER_IQ_FULL_SCALE_CURRENT, USER_ADC_FULL_SCALE_CURRENT, USER_MOTOR_CURRENT.
Unfortunately, although the system identifies and spins up my PMSM, it abruptly stops when loaded above 3-5A on the supply. Increasing the above variables up to 80A helps, but I've never been able to pull more than 5A before it stops. I've followed the guidance from Motorware ("DRV830x-HC-C2-KIT_HWGuide.pdf" and "InstaSPIN-FOC™ and InstaSPIN-MOTION™ (Rev. G).pdf") in configuring these values and am not able to get the full current span that the board is rated to handle.
Please help:
1. Explain why I'm unable to drive up to the limits established in IQ_FULL_SCALE_CURRENT, or anywhere near the ADC limit of 82.5A?
2. Explain whether IQ_FULL_SCALE_CURRENT needs to be 1/2 of ADC_FULL_SCALE_CURRENT, since the former is peak-to-peak and the latter is 0 to max? Other C2000 posts have recommended values up to the limit, but in either case, I get limited.
3. Explain what variable I can monitor in CCS to track the total current and phase current levels? I am unable to find anything within gMotorVars that tracks current.
4. Confirm which PIN/test port I can probe with a scope to monitor phase currents and total supply current and explain how I would scale these voltages to get currents. TP12,13,14 seem to correspond to phase shunts. TP23 refers to I-TOTAL. Are these the right ports? What's the scale for this board to get A? I think I'm measuring large numbers like ~40V for very low current operation.
I've attached my user.h file in the chance you might be able to help me find what's wrong with my configuration that's limiting my current.
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