2025-10-15 8:27 PM
Hello Everybody,
Here are the software and boards in this case:
1. MC workbench 6.4.1
2. STM32 FW V1.28.2
I’m using the generated code from ST MCSDK and noticed an issue on the microcontroller’s U-phase and V-phase channels (see pins Ch. U and Ch. V in picture 1; the same happens on W-phase, but I didn’t capture that waveform).
The blue waveform never completes its falling edge where it should go low, so the whole period looks like a constant high (see picture 2).
Is this behavior normal? If not, how can I fix it? Could it be related to the duty-cycle settings of PWM?
My gate-driver chip already provides hardware dead-time, so I set the software dead-time to 0; the motor still spins.
Thank you!