Low-temperature superconducting Maglev trains are considered a promising candidate for future transportation due to their superior levitation height and robust self-stability. The integrated Propulsion, Levitation, and Guidance (PLG) system not only achieves multi-function integration but also significantly enhances the system's cost-effectiveness. However, owing to the structure of the PLG system, the induced electromotive force contains significant 5 th and 7 th order harmonics. Consequently, 6 th -order thrust ripples occur during the propulsion process. To address this, this paper establishes a thrust ripple model considering these harmonics and proposes a control strategy based on active harmonic current injection within the current loop to generate compensating thrust and suppress the ripples. Finally, the proposed control strategy was validated through MATLAB-Simulink simulations and Real-Time Closed-Loop Validation on the StarSim real time platform. The results demonstrate that the proposed strategy can effectively suppress the propulsion thrust ripples of the PLG system.
Zhang et al. (Fri,) studied this question.