- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | LYU Gang, GUO Xilin. Calculation of Power Generation Characteristics of Linear Harmonic Generator for Electrodynamic Suspension Maglev Train[J]. Journal of Southwest Jiaotong University, 2023, 58(4): 783-791. doi: 10.3969/j.issn.0258-2724.20210892
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To study the power generation characteristics of linear harmonic generators for high-speed maglev trains, based on the space harmonic method, the magnetomotive force distribution model of superconducting coils is proposed, and the magnetic induction intensity distribution formula of superconducting coils in three-dimensional space is deduced. Secondly, the induced magnetic field of the suspension coil current is calculated based on the electromagnetic coupling relationship between the suspension coil and the superconducting coil, and the fifth harmonic magnetic field of the suspension coil is analyzed that to be used for collecting the inductive current. Further, the fifth harmonic magnetic field of the suspension coil is used as the excitation of the collector coil, and the analytical expression of the induced electromotive force of the collector coil is deduced. Finally, taking the MLX01 maglev train on the Yamanashi line in Japan as the engineering background, the numerical analysis value, finite element simulation and the measured data of the Yamanashi line in Japan are used for comparison. The research results show that the relative errors between the analytical values of the magnetic induction intensity, the induced electromotive force and collecting power of the superconducting coil, the finite element simulation and the measured data are all within 10%, which verifies the validity of the magnetomotive force distribution model and the analytical model. When the train speed is more than 100 km/h, the current of the suspension coil and its induced magnetic field tend to be saturated; the induced electromotive of the collecting force coil is approximately linear with the running speed of the train, and the collecting power has a quadratic nonlinear relationship with the speed; when the train speed is 500 km/h, the collecting power is 43.3 kW; the train speed reaches the target collecting power of 25.0 kW at 380 km/h, which ensures the reliability of the on-board power supply of the maglev train.
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