Unstable sine PWM output

[pxidr84]

Sometimes it's just there, staring you in the face all along and you still don't see it.... I guess this is one of those of times. It's pretty obvious now that you found it, which I'm glad you did!

Now that it works properly with DIV32 I see no reason to change to N-Bit math.

Maybe your new routine with n-bit maths is more accurate?

Anyway, I think that I will open an another thread soon for this 3-phase VFD, with a YouTube video, the source code, schematics, etc. Because it works fine on my 250W 3-phase motor (in theory my IGBT module is capable of 2,2kW of output power). It will be cool.