Traction-system research based on different proportion of current in double-end supply for high-speed maglev

In this paper, a new current control approach applied in linear synchronous motor (LSM) drive system is proposed for traction-system. The proposed method is featured by adjusting the current proportions of paralleled converters in double-end supply. First, the theoretical model of LSM of double-end supply is established and the control strategy consists of an outer PI speed closed-loop, an inner current closed-loop and a circulating current loop. In order to minimize the power losses on cables, the proportion of the two-end current supply can be chosen to be different. Simulation results verify the feasibility of the control method in double-end supply traction-system.