Hopefully? Another 48vdc-240vac Toriod Inverter build.

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poida Guru Joined: 02/02/2017 Location: Australia Posts: 1432	Posted: 10:31am 12 Jan 2023       is about as good as it gets. The nature of the PWM modulation means at zero crossing, there MUST be a short pulse at some time just before or shortly after zero crossing. And this excites 1kHz or so oscillations and we see this as wobbles in the waveform. We could attempt to dampen them with an RC filter or something but no point really. The above waveform would be about 0.2% distortion and this is like 10 or 20x better than commercial inverter or generator advertising specs. But experiment and observe and do it again and again! This is why we do this. To learn and to make an inverter to run the house. I look forward to what next you discover.