EMI Worsening in a SMPS with Non-linear Inductor
- Autori: Scire D.; Lullo G.; Vitale G.
- Anno di pubblicazione: 2022
- Tipologia: Articolo in rivista
- Parole Chiave: Electromagnetic interference (EMI) filter; inductor; nonlinear magnetics; power density; saturable core; Switched Mode Power Supply
- OA Link: http://hdl.handle.net/10447/567773
Abstract
This paper is focused on the input current in a Switched Mode Power Supply (SMPS) in which the power inductor is exploited up to the saturation showing a non-linear behaviour. The input current exhibits a distortion due to the non-linearity. The electromagnetic interference (EMI) caused by the ripple at switching frequency, superimposed to the DC value of the input current, requires a suitable design of the input differential mode (DM) filter. The input current is analyzed both in the time and frequency domain for different operating conditions, and it is compared to a SMPS equipped with a traditional linear inductor.