Analysis on Electromagnetic Interference for Power Plane-Battery Management System (PP-BMS) Enclosure

Finite Difference Time Domain (FDTD) is applied to study the characteristics of electromagnetic interference for power plane-battery management system (PP-BMS) enclosure, for modeling the coupling of an incident electromagnetic pulse (EMP) with a conducting wire through a BMS enclosure and aperture on it. Simulation and analysis are done by radius of the wires, incidence angles of EMP in the conditions of different polarized direction, and different annular apertures in consideration. The simulation result shows that interference of the electromagnetic coupling into the PP-BMS enclosure can be affected in different degrees by above factors. At low frequency, the larger the radius of the wire penetrated into the PP-BMS enclosure, the more interference is coupled into the BMS enclosure from electromagnetic field. Also, the electromagnetic energy coupled by penetrated wire when incident wave radiates aslant is more than the coupling energy when incident wave radiates the target vertically in the condition of vertical polarized direction of electric field, and less in the condition of horizontally polarized direction of electric field. Furthermore, in the case of the same aperture area, the coupling electromagnetic energy into the circular annular aperture is smaller than that into the rectangular and the square ones. Copyright © 2014 IFSA Publishing, S. L.