Vehicle Power Grid Voltage's Influence on Anti-Disturbance Ability of Maglev Train

Abstract:

Maglev train operation process can be affected by a variety of disturbance force. The system stiffness should be improved in order to strengthen the train's anti-disturbance ability. The electromagnet input voltage will saturate when the system is disturbed by a large force. Since the electromagnet input voltage can only change in the range of the vehicle power grid voltage, the system performance is unable to be further improved by increasing the proportional feedback coefficient. Therefore an appropriate vehicle power grid voltage should be selected in consideration of the disturbance force the train may meet. In this paper, the mathematical model of magnetic suspension system was established according to the dynamics and electromagnetism theory. Then the working principle of the digital chopper and the linear generator was analyzed. Finally the relationship between the vehicle power grid voltage and the system anti-disturbance ability was explored. Gap changes of systems with different vehicle power grid voltage are compared in consideration of several common disturbing forces. The simulation results show that the higher the power grid voltage is, the stronger the system resistance ability to impact interference is. The existed 440 V vehicle power grid voltage can guarantee the stability of maglev train under 20 kN impact interference. But under more than 20 kN impact, train may crash the track. By selecting 500 V power grid voltage, the trains' gap change will be less than 5 mm, under 20 kN impact interference.The gap overshoot volume is reduced by 35.2% compared with that with 440 V power grid voltage.

• Periodical: Applied Mechanics and Materials (Volumes 462-463)
• Pages: 798-802
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.462-463.798
• Online since: November 2013
• Authors: Jin Hui Huang*, A Ming Hao, Xiao Long Li, Long Hua She
• Keywords: Anti-Disturbance, Maglev Train, Vehicle Power Grid Voltage

References

[1] Zhiqiang Long, Song Xue, Longhua She, Wensen Chang in: Distributed Active Fault—tolerant Control for Module Suspension System of Maglev Train, volume 31 of Journal of the China Railway Society (2009), p.38－43. (In Chinese).

DOI: 10.1109/chicc.2008.4605286

[2] Xiaolong Li. Research on Signal Processing and Control Technologies for Suspension System in EMS High Speed Maglev Train (2009). (In Chinese).

[3] Hengkun Liu, Aming Hao, Wensen Chang. Nonlinear decoupling control of the join-structure in a maglev train, volume 26 of Control Theory and Applications (2009) ，p．899－902．(In Chinese).

DOI: 10.1109/icca.2007.4376586

[4] Xinlin Long, Longhua She, Ganfei Weng. Research on the chopper of EMS and PEMS, volume 34 of Electric Locomotives & Mass Transit Vehicles (2011) ，p．1—3．(In Chinese).

[5] Jiangchao Wang, Hua Oouyang, Zhaohui Du. The Suspended and Driving Systems of German Maglev Vehicle, volume 41 of Foreign Rolling Stock (2011) ，p．1—5．(In Chinese).