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中文摘要：
本文研究了高温超导磁浮系统中由于永磁轨道的磁场分布不均匀而引起的驱动变频电源的逆变器母线电压的变化情况，将磁场分布不均匀引起的悬浮高度变化而导致的推力的变化直接简化成改变系统中直线感应电动推力的改变，采用双闭环控制器生成逆变器的驱动信号以驱动IGBT的方式调节母线电压的稳定性，用Matlab／Simulink以软件仿真的形式验证控制器器的合理性．用两种方式模拟了气隙磁场衰减辐值40％的稳压控制效果，仿真真结果表明它们对电压稳定性的控制基本没有区别，证明了文中所用控制方法适用于高温超导磁浮系统中．
英文摘要：
The variation of the inverter＇s bus voltage in HTS maglev is studied in this paper. This variation is caused by the unbalanced distribution of the magnetic field on the permanent magnetic guidway. The thrust of the linear induction motor in this system is affected directly by the suspension height. When the thrust is decreased, the bus voltage should be increased to compensate it. A controller with double close＆loop is presented and verified by the Matlab/Simulink. Two kind of magnetic field decline mode are used to get the simulation results. It illustrates that there is no difference between them. So this controller is suitable for the HTS maglev system.
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