Electromagnetic compatibility (EMC) becomes a substantial challenge than any other time since the number of electric vehicles (EV) is increased rapidly. The electric driving system in EV consists of power electronics components supplied by high voltage battery source. Those are both potential electromagnetic interference (EMI) source and victim since fast switching process occurs inside themselves. Electromagnetic shielding provides a significant protection against EMI for any electrical and electronic components inside the vehicle. In this paper, analysis of shielding effectiveness (SE) by optimizing aperture dimensions of a rectangular enclosure is investigated. Realistic dimensions of the shielding enclosure of an inverter component is employed. An optimization methodology based on genetic algorithm (GA) is carried out and applied to SE analytical model. It is aimed to keep total aperture area as large as possible inside a particular dimension range while improving SE of the enclosure comparing with the reference level. Obtained optimization results are presented by indicating optimum aperture length and width which satisfy both EMC and dimension requirements. Finally, it is concluded that through the optimization methodology designed in this study, SE of the enclosure is raised from poor level to average one while providing larger aperture area.
Öz: Emisyonları kısıtlayıcı yeni regülasyonlar neticesinde elektrikli araçlara olan talep gittikçe artmaktadır. Elektromanyetik uyumluluk (Electromagnetic Compatibility-EMC), yüksek gerilimli batarya ünitesi ve elektrikli sürüş sistemi bileşenlerinin konvansiyonel araç mimarisine dahil edilmesinden dolayı tasarım aşamasında değerlendirilmesi gereken en önemli konulardan biri haline gelmiştir. Bu çalışmada, elektrikli araçlarda sıklıkla karşılaşılan EMC problemlerinden biri olan elektronik ekipman koruyucu kutularındaki ekranlama problemi analiz edilmiştir. Açıklık ve kutu boyutları ile ekranlama etkinliğinin değişimi incelenmiştir. Farklı açıklık geometrilerinin, ekranlama etkinliği üzerindeki etkisi 0-2 GHz aralığında nümerik olarak elde edilmiştir.
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