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Troubleshooting Noise in Sine Wave Inverter

Posted by Afuevu
2:10 pm
07/03/2025

Hello everyone , working on a high frequency sine wave inverter, i observed that when working(giving output AC voltage)my output inducator has a very disturbing noise, as shown on the first video, I saw a reference material online suggesting that the noise is caused by my low switching frequency which is 20khz as can be seen on the second video, I decided to double the frequency, and I observed that the noise on the inducator reduced as shown on the third video, but it’s still there. I will appreciate if anyone has an idea on why that noise is much t the inducator, is it because of the low switching frequency or the filter for the high voltage DC is not enough ? Or what could be the challenge