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针对目前中低速磁浮列车采用的第三轨受流方式,建立了车体放电主电路的接地阻容(R-C)网络的数学函数,结合函数的波特图和实测频谱数据开展了接地电流特征研究。理论分析与实测数据表明,车体电位累积与泄放体现出动态变化与平衡特性,可进一步优化R-C参数并采取悬浮架与车体分开接地,以形成快速导流通道,改善接地性能。
In view of the third rail current-flow method used in low and medium-speed maglev trains, the mathematical function of the RC network of the main circuit of the vehicle body discharge is established. The ground current characteristics are studied by combining the Bode plot of the function and the measured spectrum data . The theoretical analysis and measured data show that the potential accumulation and discharge of the vehicle body show dynamic changes and balance characteristics. The R-C parameters can be further optimized and the suspension frame and the vehicle body can be grounded separately to form a fast diversion channel to improve the grounding performance.