Could someone explain the difference between the PWM mode and the pattern mode? To me, the example of the PWM wave [1] looks like the VFD mode, but: - instead

Could someone explain the difference between the PWM mode and the pattern mode? To me, the example of the PWM wave [1] looks like the VFD mode, but: - instead of varying between [-V..V], varying between [0..V] - instead of having a regular variation of pulse pattern to get a regular wave, having an irregular pattern. But that irregular pattern (or non-recurring pattern) only seems to be an illustrative example to match the brown wave shape, and I assume you wouldn't want to have irregular wave patterns to drive your engine? [1] https://youtu.be/IRJIJPTUXXE?feature=shared&t=406 https://youtu.be/IRJIJPTUXXE?feature=shared&t=406