Optimization of EMC management plan for BOP(Balance of Plant) of fuel cell electric vehicle(FCEV)

The electromagnetic characteristics of FCEVs(fuel cell electric vehicles) are much different from the existing combustion engine cars as well as hybrid, plug-in-hybrid, and pure electric vehicles due to the high voltage/current generated by a fuel cell stack which uses a compressed hydrogen gas reacted with oxygen. To operate fuel cell stack efficiently, BOP(Balance of Plant) is essential. BOP systems are used many not only for motors in water pump, air blower, and hydrogen recycling pump but also inverters for these motors. Since these systems or components are connected by high voltage cables, EMC (Electromagneti c compatibility) management plan for the BOP systems of FCEV is the most important element to prevent the possible electric functional safety errors. In this paper, a systematic approach in applying the EMC standard for FCEV system is studied. Firstly, the analysis procedure for CE(Conducted Emission) and RE (Radiated Emission) from BOP systems is established. Subsequently, theoretical basis for applying EMC standard to BOP system is described.