Permanent Magnet Electromagnetic Hybrid Suspension System for Medium and Low-Speed Maglev Train

Abstract

The medium and low-speed maglev trains adopt EMS suspension technology. Through statistical analysis of the energy consumption data of the commercial operation line Beijing S1 maglev train, the data shows that the energy consumption of the suspension system is as high as 20%. To meet the development requirements of green, low-carbon, and environmental protection, and reduce suspension energy consumption, research on permanent magnet electromagnetic hybrid suspension technology is carried out. Firstly, the design, structural optimization, and model establishment of the hybrid electromagnetic circuit scheme were completed. Secondly, the centralized suspension control technology based on the two in one concept has been overcome, and the suspension control algorithm based on the modular decoupling control concept has been studied. A permanent magnet anti suction control strategy and fault-tolerant control algorithm for the suspension control system suitable for medium and low-speed maglev trains have been proposed. Finally, the fabrication of a permanent magnet electromagnetic hybrid suspension system was carried out, and experimental verification was conducted on suspension energy consumption, temperature rise, and operational performance for the permanent magnet electromagnetic hybrid suspension system. The experimental results indicate that the permanent magnet electromagnetic hybrid suspension system scheme is feasible; Compared to EMS systems, under rated load, the maximum temperature of the 24-hour static suspension electromagnet is controlled at 56 ℃, reducing suspension energy consumption by 63.6%. This is a green, low-carbon, and energy-saving technical solution. This technical solution improves the adaptability of the suspension system and promotes the development of medium and low-speed maglev trains.