Electro Magnetic Radiation Analysis for the Vehicle Cable and Shielding Techniques and Performance Assessment

This paper addresses the challenges and methodologies for evaluating radiated emissions from automotive electronic systems, which is critical for achieving electromagnetic interference and compatibility (EMI/EMC) standards. The rapid integration of advanced electronic components in modern vehicles has transformed automotive systems, their potential to generate electromagnetic interference (EMI) becomes a significant concern, particularly due to its impact on vital communication and safety systems. The study mainly investigates radiated EMI, which is the unintentional emission of electromagnetic energy emitted by HV cables in the wiring harness layout, potentially disrupting the operation of nearby systems. This study utilized CST Studio Suite to analyse the electromagnetic behaviour of vertically and horizontally polarized antenna configuration in electric vehicles. The simulated results are benchmarked against international EMI/EMC standards such as CISPR-12 and CISPR-25, which defines permissible emission thresholds. This comparative analyses serves to validate the simulation methodology and confirm compliance with stringent global regulatory requirements. This work further presents a comprehensive workflow for evaluating radiated emissions during the initial design phases of automotive cable routing. It emphasizes the critical role of addressing electromagnetic issues early in the design process to ensure the creation of interference free systems. Key design elements including cable routing, shielding techniques, and grounding strategies are explored. These factors significantly influence the emission levels and ensuring compliance with regulatory standards. As a result, this study serves as a guide for engineers involved in the design and validation of EMI in electric vehicles HV cable routing. By utilizing simulation tools in conjunction with international standards, manufacturers can ensure system reliability, safety, and reduced time-to-market. The results presented contribute to a deeper understanding into effective EMI management through simulation, helping to reduce the risks linked with radiated emissions and strengthen the resilience of automotive wiring harness systems.