Presentation Information
[B-4-33]Quantitative Evaluation of Grounding Method Effects on Noise Propagation Characteristics in Railway Vehicles Using a Scaled Analysis Model for EMC Evaluation
〇Fukumasu Keisuke1, Ren Meiseki1, Masahiro Yoshida1, Yoshitaka Toyota1 (1. Okayama Univ.)
Keywords:
Railway vehicle,EMC,Scaled analysis model,Grounding configuration,Scaling laws
Railway vehicles are equipped with a variety of electronic devices for control and communication, requiring high electromagnetic noise immunity for stable operation. However, on-vehicle testing is limited due to cost and safety constraints, and validating analytical models remains challenging. To address these issues, we proposed an EMC evaluation scaled vehicle model that simulates an actual railway vehicle at a reduced scale based on scaling laws, and validated the model by comparing results from a scaled physical model and a scaled analysis model. In this paper, using the validated scaled analysis model, we quantitatively evaluated the effects of two grounding configurations — car-body grounding and independent return grounding — on noise propagation characteristics from the VCB connection point to the low-voltage equipment, assuming a VCB generating surge noise of several MHz as a noise source. The results show that below 0.9 MHz in real-vehicle equivalent frequency, the independent return grounding configuration exhibits more than 20 dB lower noise propagation than the car-body grounding configuration, suggesting that the independent return grounding is more advantageous for noise countermeasures.