Hi, I'm a student testing a custom Axial Flux PCB Motor.
My motor runs smoothly in Open-loop mode, so I believe the hardware is fine. However, it loses sync immediately in Closed-loop (FOC). I suspect the measured parameters ($R, L, \lambda$) are inaccurate.
Questions:
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Parameter Reliability: Is it common for VESC to struggle with parameter detection on low-inductance, coreless PCB motors?
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FOC Waveform Analysis: In the attached FOC plot, $V_d$ and $V_q$ are fluctuating heavily. Is this behavior normal for this type of motor, or does it confirm a mismatch in the observer/parameters?
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Manual Tuning: How can I manually fine-tune these parameters to achieve a stable sync?
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PI Gains (K_p, K_i): How critical are the Current Controller Gains in preventing desync for a low-inertia motor like this? Should I prioritize tuning these over the motor parameters?