Magnetic Damping Characteristics of the Superconducting Magnetic Levitation

为了研究超导EDS磁悬浮系统的磁阻尼特性及其对运行性能和乘坐舒适性的影响，分析了最基本的悬浮系统结构的阻尼特性，分析了被动阻尼器和主动阻尼器改善磁悬浮系统阻尼特性及其性能的可行性，并利用转向架模型进行了运行仿真。1.运行模拟：利用我们开发的分析程序对超导磁悬浮转向架的六自由度运动进行了数值模拟，研究了直线段和曲线段运行、多转向架模型、超导线圈淬火、分析结果详细说明了转向架的运动情况，特别是在考虑转向架全特性时转向架转动运动的重要性，以及机械阻尼器对转向架运动的影响。2.减振机理：为了更详细地阐明转向架的减振机理，在能量平衡的基础上，只考虑了转向架的竖向运动。分析了电磁力、感应电流、线圈电阻和电感对减振特性的影响。3.被动减振器：为了从电磁角度改善车辆的减振性能，考虑了车辆中安装短路线圈的问题，分析了线圈位置和尺寸对减振效果的影响。4.主动减振器：研究了主动控制减振器线圈电流的主动减振器，结果表明，主动减振器比被动减振器能更有效地改善减振效果。提出了主动阻尼器线圈的形状、大小和位置。

To investigate magnetic damping characteristics of the superconducting EDS (Electrodynamic suspension) magnetically levitated system and their influence on running performance and riding comfort, we have analyzed damping characteristics of the most essential levitation system structure, the feasibility of a passive and an active damper for the improvement of damping characteristics and their performance, and in addition we have made running simulations with a bogie model.1.Running simulation : Numerical simulation of six-degree-of-freedom motion of the superconducting magnetically levitated bogie was carried out using analysis programs we have been developing to study running characteristics under various conditions : running along a straight and a curved section, multi-bogie models, superconducting coil quench, etc. The results show us the bogie motion in detail, in particular, the importance of the rotational motion of the bogie when full characteristics are considered, and how mechanical dampers influence it.2.Damping mechanism : To clarify the damping mechanism in detail only vertical motion of the bogie was considered and analyzed on the basis of an energy balance. The dependence of the damping characteristic on the electromagnetic force, induced current, coil resistance and inductance was demonstrated.3.Passive damper : To improve the damping characteristics electromagnetically the installation of short-circuited coils in the vehicle was considered and the influence of the coil position and size was analyzed.4.Active damper : An active damper, where the damper coil current is controlled actively was investigated, The results show that it can improve the damping more effectively than a passive coil. The shape, the size and position of active damper coils were proposed.