Analysis of shielding effectiveness by optimizing aperture dimensions of a rectangular enclosure with genetic algorithm

Abstract

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.

Analysing the shielding effectiveness of rectangular enclosure by determining aperture dimensions with particle swarm optimization

“…The protection of electronic circuits against external electromagnetic interference (EMI) can be fulfilled by placing them into an electromagnetic shielding enclosure. The ideal shielding enclosure consists of perfect electric conductor and has no aperture on itself to prevent EMI leakage [1]. Yet, apertures are certainly necessary for the enclosures due to mounting connectors, ventilation, and heat dissipation etc.…”

“…Shielding enclosures are widely used in complex electromagnetic environment such as electric vehicles (EV) to isolate electronic circuits inside [1]. Due to weight and dimension considerations, they cant be designed so large.…”

“…This situation brings new problems that are very difficult to solve and time-consuming to model mathematically. Various artificial intelligence and heuristic algorithms have been developed to obtain a reasonable solution to these difficult problems without dealing with the internal mathematical equations [1]. Approaches used in heuristic algorithms are derived from sciences such as biology, zoology and physics.…”

“…By utilizing genetic operators such as reproduction, crossover, mutation the generational diversity inside the population is ensured, therefore GA can achieve optimal solution. GA has important advantages such as not requiring derivative information, investigating the best solution in a wide range and being able to perform searching with many parameters at the same time [1], [8].…”

Design and manufacture of electromagnetic absorber composed of boric acid-incorporated waste paper composites

“…As a result of the advances in technology, the use of electromagnetic wave generating devices is becoming widespread day by day, and thus people are exposed to electromagnetic waves in daily life [16,17]. The adverse caused by electromagnetic waves is still open to question since there is no clear and direct evidence of its possible effects on human health.…”