An Integrated Auxiliary Power System for High-Speed Electromagnetic Suspension Maglev Trains

To achieve non-contact auxiliary power supply during low-speed operation of high-speed electromagnetic suspension maglev trains while minimizing the weight of the coupling mechanism, this paper proposes an integrated high-low speed auxiliary power supply system. During low-speed operation and station stops, two-phase transmitting coils are added to the stator slots to generate a high-frequency magnetic field, while the existing onboard collector coils are repurposed for harvesting high-frequency energy. To ensure efficient transmission of both low-frequency motional energy and high-frequency induced energy to the onboard electrical equipment, a hybrid high-low frequency energy coexistence circuit (HLC) is designed, which achieves full compensation of high-frequency energy while exerting minimal impact on low-frequency energy transmission. The proposed system has no impact on the train’s original systems and requires no additional coils to be installed on the vehicle. To validate the feasibility and effectiveness of the proposed solution, a full-scale (1:1) prototype was developed and experimentally validated. Results demonstrate that a single power generation branch can consistently deliver over 600 W of output power, regardless of whether the collector coil is aligned with the stator tooth or slot.