Research on the Application of Electromagnetic Compatibility Technology and Nonlinear Partial Differential Equations in Ultra-High-Speed Magnetic Levitation Carbon Fiber Flywheel Energy Storage System

In order to meet the requirements of frequent and rapid charging and discharging, small volume and other requirements, the regenerative braking energy recovery of rail transit uses an ultra-high-speed magnetic levitation carbon fiber flywheel energy storage system. The flywheel energy storage system (FESS) uses a 500 kW two-level inverter (input DC 2000 V, output three-phase AC, electrical frequency 6.67 kHz), an 8-pole DC brushless motor and 3 Hall sensors (power supply DC 15 V). The experiment found that the speed signal jitter was ±10%, which affected the system performance. Based on the electromagnetic compatibility (EMC) technology of high-speed EMUs and maglev tests, this paper proposes an EMC framework of comprehensive shielding, filtering, isolation and grounding measures. Based on the existence, regularity and stability of solutions of nonlinear partial differential equations (PDEs) by Wei Dongyi, the complex electromagnetic field distribution in FESS is analyzed to optimize the EMI suppression strategy. Through detailed mathematical modeling, numerical simulation and test platform experiments, the results show that the radiated EMI is reduced by 30 dB, the speed signal jitter is reduced by 90%, and the system reliability is improved by 25%. This study provides a rigorous reference for the EMC design and mathematical optimization of maglev FESS.