In my RDR-290 based circuit I need to achieve THD <10%.
What changes I can do to get this value.
Currently in production I got result between 18 to 21% I need to reduce this immidiately. Please guide for this.
Were you able to achieve <10% before production? I looked at RD-290 report but even RD-290 has > 10% THD.
If you can add an external circuit, you may try to add an R-C between the DC bus (C8) and FB pin. The value of the R-C has to be fine-tuned but for a start, use 10nF/630V and 2.7Meg/0.5W. If the resistor value is not optimized, the unit might go into auto-restart or skip cycle. You might want to use the equation below and make sure the resistor is higher than the computed values.
If you can't add components, you can lower the KP further (make it more continuous) by increasing the inductance. This lowers the THD a bit but it might not be enough to achieve <10%.
The three design considerations to lower the Total Harmonic Distortion:
An Essay from Essay writing service
도움이 필요하신가요? 지금 주문하세요