Review on Modeling and Emissions from EMI Filters in Power Electronics: Inductors

The issue of electromagnetic interference (EMI) is a critical and complex matter in power electronics. In the current landscape of rapidly evolving power electronics applications, high switching frequencies are widely adopted to reduce the size of devices and components, increase power density, and improve overall efficiency. Magnetic components, such as inductors, play vital roles in power converters and EMI filters. Consequently, many researchers have focused on studying inductors in EMI filters to enhance equipment performance. Building upon existing research, this paper will begin by presenting the fundamental inductor model and various methods for optimizing inductor design. Subsequently, the impact of inductors on conducted EMI in converters will be discussed. Lastly, this paper will introduce the radiation model of inductors, including near magnetic field and near electric field radiation.