Analysis of Conducted Emission EM Noise in High Voltage Power Conversion Systems for Electric Vehicle

The high-voltage power conversion device serves as an integral component in the propulsion systems of electric vehicles (EVs), a relevance amplified by the expanding adoption of EVs. Among various power conversion systems deployed in EVs, the foundational direct current to direct current (DC-DC) converter is instrumental in supplying the requisite voltage to diverse components from a high-voltage power source. This capability profoundly influences both charging efficiency and vehicular performance. Consequently, associated with electromagnetic interference (EMI) noise interactions among components, system stability, and safety considerations-particularly in relation to high-capacity batteries - have ascended in significance. To address these concerns, this paper conducts an in-depth analysis of the EMI noise characteristics in LLC Resonant DCDC converters across a range of various operational conditions [1].