Electromagnetic Exposure Safety Assessment of Medical Implants in the Human Body for EV -WPT Considering Uncertainty

For humans exposed to electromagnetic fields, metal medical implants pose more safety issues. The objective of this article is to analyze the safety issues of human electromagnetic exposure containing implants in the electric vehicle wireless power transfer (EV- WPT). This article establishes an adult male human model with a coronary artery stent and hip joint implant and is exposed to the leakage magnetic field of an EV -WPT system. The EV-WPT system has a transmission power of 30kW and a working frequency of 85kHz. Fully considering the uncertainty of human exposure to the electromagnetic environment of the EV-WPT system, such as the distance between the human body and the EV-WPT system, the distance between the EV-WPT system coils, and the parameters of the compensation circuit, this article uses Bayesian Neural Networks to evaluate human electromagnetic safety. Bayesian neural networks can obtain accurate results with fewer training sets and have higher computational efficiency. The results showed that the probability of electromagnetic exposure levels significantly exceeding the standard limit in the human body with hip joint implants was almost 100%, while the probability of exceeding the standard limit in the human heart with coronary artery stents did not exceed 31.5%. Patients with medical implants may need to limit power when using the EV-WPT system.