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题名	混合磁体直线同步电机系统悬浮驱动联合控制研究; 混合磁体直线同步电机系统悬浮驱动联合控制研究
作者	1谢吉,电工研究所
学位类别	硕士
答辩日期	2008-05-30
授予单位	中国科学院电工研究所
导师	1史黎明,电工研究所
关键词	混合磁体 悬浮力 牵引力 转子磁场定向控制 解耦控制 hybrid magnets levitation force thrust rotor field oriented control decoupled control
其他题名	混合磁体直线同步电机系统悬浮驱动联合控制研究
中文摘要	混合磁体直线同步电机系统采用永磁材料加电磁绕组的混合方式励磁，用高磁能积的永磁体产生的吸引力可以平衡部分甚至全部的列车负载载荷，使得悬浮时励磁电流大为减少、励磁损耗显著降低、发热情况大为改善。 论文利用磁场分层模型理论，对用于磁浮列车的混合磁体直线同步电机系统悬浮力和牵引力及其相互关系进行深入分析。认为混合励磁磁场和电枢铁心间的吸引力为悬浮力的支配部分，电枢磁场和磁体轭部之间产生的吸引悬浮力很小，可忽略不计。励磁磁场和电枢磁场间相互作用的法向分量产生吸引、或是排斥的悬浮力，切向分量产生牵引力或制动力，其性质均由负荷角确定。当控制定子d轴电流为0时，两个磁场间的相互作用法向分量为0，由此可以最大程度减小牵引对悬浮的影响。通常牵引控制是在悬浮基本稳定后实施的，正常悬浮时流过悬浮磁极励磁线圈的电流较小且基本稳定，同时可在水平方向上设置位置、速度闭环控制来补偿悬浮对牵引的影响，从而实现了悬浮力与牵引力的解耦控制。 混合系统的悬浮驱动实验分为三部分：首先对原有的悬浮系统的电气和机械结构部分进行了完善和改进，对涡流传感器的温漂现象进行了补偿，实现了悬浮小车软起浮、软着落的稳定悬浮；对矢量控制进行了理论分析，并采用一种新型的SVPWM快速算法，编写了基于DSP的矢量控制程序，实现了位置、速度的精确控制。将实现的悬浮控制和驱动控制结合起来，实现了悬浮驱动的联合控制，实验中取得了令人满意的效果。 A hybrid magnets linear synchronous motor is excited by both permanent magnetic material and electromagnetic winding. The attractive force produced by permanent magnets which can balance partial or even total weight of load makes the exciting current greatly decreased, exciting loss evidently reduced and exothermic condition greatly improved during the levitation. By analyzing the levitation force and thrust that is based on layered boundary value model theory of this hybrid magnets linear synchronous motor system, we can know that the attractive force between hybrid exciting field and armature core is main portion of levitation and the attractive levitation force between armature field and magnet core is so small to ignore. Also we can see that the normal component of interaction force between exciting field and armature field is levitation force which is attractive or repulsive and tangential component is propulsive or braking force. The characteristics of these components are decided by the load angle. By using the vector drive control with setting d-axis current to zero, normal component of interaction force could be zero. So the effect to levitation is reduced greatly . Generally, the propulsive control is executed after the atable levitation in which the exciting current of magnetic pole is very small and basically stable. The closed loop control of position and speed can also be settled to compensate the small fluctuation to propulsion. Thereby the decouple control of levitation force and thrust is realized. The experiments of levitation and propulsion for this hybrid system have three parts. Firstly, the stable levitation of model vehicle is completed by recovering and improving the electricity and mechanical structure of levitation system and compensating the temperature drift of the eddy-flow sensor. Then, the precise propulsion control of this model vehicle is realized by analyzing the vector control theory which adopts a new simplified SVPWM method and programming the DSP program of vector control. Finally, the decouple control of levitation and propulsion which shows the satisfactory experimental results is completed by combining the levitation control and propulsion control that have been realized.
语种	中文
公开日期	2010-10-18
页码	76
分类号	TM1;TM921
内容类型	学位论文
源URL	[http://ir.iee.ac.cn/handle/311042/7075]
专题	电工研究所_其他部门_其他部门_硕士学位论文
推荐引用方式 GB/T 7714	1谢吉,电工研究所. 混合磁体直线同步电机系统悬浮驱动联合控制研究, 混合磁体直线同步电机系统悬浮驱动联合控制研究[D]. 中国科学院电工研究所. 2008.

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