Person: YENİKAYA, SİBEL
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YENİKAYA
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SİBEL
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Publication Analysis of shielding effectiveness by optimizing aperture dimensions of a rectangular enclosure with genetic algorithm(Tübitak Bilimsel ve Teknolojik Araştırma Kurumu, 2021-01-01) Güler, Sunay; Yenikaya, Sibel; Güler, Sunay; YENİKAYA, SİBEL; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Elektrik-Elektronik Mühendisliği Bölümü; 0000-0003-3851-3357; ABC-7977-2021; EEJ-1855-2022Electromagnetic compatibility (EMC) has now become a substantial challenge more than any other time since the number of electric vehicles (EV) increased rapidly. The electric driving system in an EV consists of power electronic components supplied by high voltage battery source. They are both source and victim of potential electromagnetic interference (EMI) since fast switching process occurs inside them. 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 are employed. An optimization methodology based on genetic algorithm (GA) is carried out and applied to an SE analytical model. It is aimed to keep the total aperture area as large as possible inside a particular dimension range while improving SE of the enclosure compared 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, the SE of the enclosure is raised from a poor level to an average one while providing larger aperture area.Publication Design optimization using dielectric slab for efficient microwave heating(Tubitak Scientific & Technological Research Council Turkey, 2019-01-01) Yenikaya, Sibel; Yenikaya, Sibel; YENİKAYA, SİBEL; Mekonnen, Sofiya Ali; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi.; 0000-0001-9276-9463In this paper, usage of a dielectric slab on the top and bottom sides, on the top side, and on the bottom side of a clay sample was presented as a means of improving heating efficiency in multimode applicator. In order to accomplish the optimization procedure, we used four different dielectric slab types having different thickness values. The simulated results show that by using additional dielectric slab it is possible to increase the electric field intensity inside the applicator and obtain higher power absorption rates within the sample and high-efficiency designs.Publication Emc design for battery electric vehicle (bev) propulsion system(Ieee, 2019-01-01) Güler, Sunay; Şimsek, Mustafa; Yenikaya, Sibel; YENİKAYA, SİBEL; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Elektrik Elektronik Mühendisliği Bölümü.Recently, Battery Electric Vehicle (BEV) became a popular research and development area due to new regulations which aim CO2-free transportation and emission limitations by governments. The integration of electric propulsion systems, that basically consist of high-voltage battery unit, inverter, e-machine, charger, DC/DC converter, into today's cars represents a substantial challenge. Due to having High Voltage (HV) wiring harness and components inside BEV, EMC takes its place as a crucial point that must be investigated. In this paper, the authors show an image of electromagnetic environment of BEV propulsion system. Analysis and design of the propulsion system with practical techniques are represented for reducing the electromagnetic interference.Publication Parametric study on shielding effectiveness of graphene based bilayer structure(Pamukkale Üniversitesi, 2023-01-01) Güler, Sunay; Yenikaya, Sibel; YENİKAYA, SİBEL; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Elektrik-Elektronik Mühendisliği Bölümü; 0000-0003-3851-3357; EEJ-1855-2022In this study, it is aimed to increase shielding effectiveness of electromagnetic shields by coating with graphene sheet. Firstly, graphene monolayer is modeled numerically and it is observed that it is in good agreement with the analytical findings. Then, the reflection loss of bilayer screen that is formed by coating the back surface of an aluminum plate with graphene sheet, is analyzed analytically and numerically. Finally, a shielding enclosure in which inner surfaces are coated with graphene sheet is modeled and the change of shielding effectiveness of the shielding enclosure with respect to the chemical potential and temperature values of graphene sheet is investigated. It is obtained that shielding effectiveness of shielding enclosure decays depending on the increase of chemical potential of graphene sheet while the temperature parameter remains fixed. Shielding effectiveness values are obtained close to each other at the temperature 300 K and above depending on the increase of temperature of graphene sheet while the chemical potential remains fixed.Publication Improving the shielding effectiveness of a rectangular enclosure by optimizing aperture and coating with graphene sheet(Taylor, 2022-07-09) Güler, Sunay; Yenikaya, Sibel; YENİKAYA, SİBEL; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Elektrik-Elektronik Mühendisliği Bölümü; EEJ-1855-2022Incorporating an electric propulsion system into conventional vehicle electronic architecture makes electromagnetic compatibility (EMC) become one of the most important issues during electric vehicle design. Electromagnetic shielding is one of the compulsory preventions to protect electronic circuits against electromagnetic interference (EMI). However, apertures of the shielding enclosure reduce shielding effectiveness (SE) by permitting EMI leakage to affect the electronic circuits. When the dimensions of the enclosure remain fixed and the aperture has a particular area, studies such as optimization of the aperture dimensions or changing the enclosure material are essential. In this study, a genetic algorithm (GA) is designed initially, which improves SE by determining aperture dimensions on the front surface of the shielding enclosure. Then, obtained aperture dimensions are used in a numerical model in which the inner surfaces of the enclosure are coated with graphene sheets. It is observed that SE simulation results are in good agreement with measurement ones.