Objective PM-ECB （permanent magnet eddy current braking） is one of the key technologies for high-speed maglev trains, but its technology is not yet mature. Therefore, it is necessary to study the characteristics of PM-ECB.

Method Taking a high-speed maglev train braking design project as the actual research carrier, based on the basic theory of PM-ECB, a mathematical model of the PM-ECB system is constructed. The calculation formula of eddy current braking force is derived through theoretical derivation, and the influences of key parameters such as braking gap, permanent magnet magnetic field strength, conductor plate thickness, and train running speed on eddy current braking force are analyzed; the control variable method is adopted to change each key parameter one by one, and the rationality and adaptability of the setting values of each parameter are verified through calculation and comparison.

Result & Conclusion Through the comparative analysis of eddy current braking force calculation results under different parameter combinations, it is verified that the set braking parameters all meet the eddy current braking force requirements for the actual operation of high-speed maglev trains, and the parameters have good compatibility and can effectively ensure the stability and safety of the braking process; it is clarified that the optimal speed range for the application of PM-ECB is 50~300 km/h. Within this range, the eddy current braking force output is stable and the braking efficiency is high, capable of fully exerting the technical advantages of PM-ECB.