Determination of the Frequency Behavior of Passive Power Electronics Components

Energy conversion in power electronics comprises two complementary phases: switching, performed by semiconductors. There are two types of switch: controlled components (MOSFET, IGBT, thyristor, etc.) and uncontrolled components (diodes). Energy storage takes place via passive components such as capacitors and inductors, as well as resistors, which transform electrical energy from one form to another. The use of semiconductor components (MOSFETs, IGBTs, thyristors, etc.) during switching leads to rapid variations in voltage (dv/dt) and current (di/dt). This generates high-frequency electromagnetic disturbances and interference on passive components. The aim of this study is to determine the equivalent models and frequency behaviors of passive components (resistor, inductor, capacitor) at high frequency, using LT-spice software.