How to fix the problem of the PWM incomplete falling edge?

[DF_MC]

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!

[GMA]

Hello @DF_MC,

Do you have the same low-level behavior zooming in the figure (smaller time scale to display only one or two PWM period)?