Research on electromagnetic emission characteristics of vacuum tube magnetic levitation system

Vacuum tube magnetic levitation transportation is a novel rail transportation technology with high-speed operation under a specific environment without wheel resistance, and with low air resistance and noise. Operation of a maglev train system in a tube is currently studied [1] ; it consists in a complex system integrating both high-power electrical equipment and low-power, sensitive signalling and control command equipment [2] . The resulting electromagnetic compatibility problem to ensure coexistence and proper operation of both types of equipment relies on the determination of the main electromagnetic emission sources of the maglev train [3] . Prior analysis of the characteristics of these emissions is of great significance to ensure the electromagnetic compatibility of the maglev transportation system.