Experimental Study of Radiated Emission Due to Secondary Common-Mode Current in Buck Converters
Source abstract
Abstract
High switching frequency and fast switching speed of wide bandgap power semiconductor device-based power converters may increase radiated emissions more than conventional silicon-power device-based power converters. Based on the background, this article experimentally investigates radiated emission sources in buck converters. The experimental system constructed in this article has two common-mode noise paths, the primary common-mode and the secondary common-mode. First, this article outlines that a secondary common-mode voltage source is caused by a primary common-mode current and an imbalance of power supply side impedances, and the secondary common-mode current path acts as a monopole antenna. The common-mode currents and the radiated emissions are measured in an anechoic chamber when the common-mode inductor for each mode is connected. The measurement results show that the primary common-mode current generates the secondary common-mode noise, and the secondary common-mode noise is the dominant source of radiated emission in the experimental system.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Electromagnetic Compatibility and Noise Suppression · Electrostatic Discharge in Electronics · Silicon Carbide Semiconductor Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Graduate School of Engineering Science, Akita University, 1-1, Gakuen-machi, Tegata, Akita-shi, Akita 010-0852, Japan
References (34)
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