Abstract
Converters are key components of new-energy vehicles like Hybrid Electric Vehicle (HEV) and Pure Electric Vehicle (PEV). The converters enable those kinds of vehicles to realize their outstanding functions, while they are also main sources of electromagnetic (EM) interference in the vehicle. In this article, we carry out the standard test of GB/T 18387 and GB 14023 for the objective HEV and find out it radiated EM interference more than the standard limit from 1MHz to 40MHz. The main sources of EM interference, as well as their coupling paths, are identified, based on the tests and the power level of every electronic component set in the system. We then build a simulation model in CST STUDIO SUITE (CST) to explore measures of restricting the EM interference, and compare effects of those measures. Summarizing the simulation results, we make some improvements on the HEV and verify the reliability of the simulation results. According to the standard test, the improved vehicle has a better EMC performance and can fulfil the requirement of the standard. References to lower the improvement cost as well as maintain HEV’s reliability, in the practical use, are proposed and discussed.
KEYWORDS – HEV, converter, electromagnetic interference, filtering, EMC