Study on Predicting Conductive Emissions in Electric Vehicles During Charging Utilizing Both EMC Simulations and Neural Networks

Makoto Jomoto･Keishi Miwa･Naoya Kajiura (Toyota Motor)

The requirements for vehicle certification include measuring conductive emissions generated by vehicles in the rechargeable energy storage system (REESS) charging model when coupled to the power grid through its AC or DC power lines. Recently, simulations and neural networks for predicting EMC performance have gained attention as a means to reduce the time and cost required for performance verification. In this paper, we aim to utilize both EMC simulations and neural networks to predict conductive emissions.

Stress Level Analysis Due to Differences in Application Methods in Electrostatic Discharge Testing

Hiroki Itozakura (Toyota Motor)･Takeshi Ishida (NOISE LABORATORY)

In electrostatic discharge testing, there are three application methods: contact discharge, air discharge and gap discharge, and the stress level changes depending on the application method. Additionally, in the case of air discharge, the stress level can also change due to differences in approach speed and humidity. This paper compared and analyzed the differences in stress level caused by application methods and environmental factors from the perspectives of peak current, rise time and frequency components.

A study on the effects of HEMP for automotive equipment

Akira Mori (Toyota Motor)

With the advancements in CASE, concerns have arisen regarding the effects of HEMP (High-altitude Electro-Magnetic Pulse) for automotive equipment. We conducted a study on this issue. We applied HEMP pulses (50 kV/m) to test samples that simulated vehicle wire harnesses and measured the induced voltage waveforms. As a result, we confirmed that the test samples induced voltage waveforms similar to those caused by electrostatic discharge.

Construction of direct evaluation system of adsorption/desorption speed for physisorption of carbon dioxide

Yoshitaka Hirabayashi･Takashi Kuraishi･Hiroshi Yokoyama (Toyohashi University of Technology)

To establish technologies for the separation and recovery of carbon dioxide in exhausted gases from plants and transport vehicles, the system for direct measurements of adsorption/desorption speeds in the physical adsorption of carbon dioxide with a plate-type adsorbent was constructed. Moreover, the effects of acoustic excitation to the adsorbent, which is known to affect the adsorption, on adsorption/desorption are investigated using this system.