永磁偏置混合式磁悬浮轴承结构与控制系统研究

发布时间：2018-06-27 19:16

本文选题：永磁偏置磁悬浮轴承 + 耦合分析　；参考：《沈阳工业大学》2011年硕士论文

【摘要】：磁悬浮轴承(Magnetic Bearing)是利用磁力作用将转子悬浮于空中,使转子与定子之间没有机械接触。永磁偏置磁悬浮轴承作为磁悬浮轴承的一种,已经成为各国专家学者争相研究的热点。与主动式磁悬浮轴承相比,用永磁磁通来代替电励磁磁通作为偏置磁通,减小了控制绕组中的电流,减少了功率器件个数和散热面积,降低了损耗,提高了效率。本文研究了一种永磁偏置磁悬浮轴承的结构。介绍其工作原理,推导了整个永磁偏置磁悬浮轴承的等效磁路,并对磁路中的电磁参数进行了计算。根据电磁参数的计算结果设计了永磁偏置磁悬浮轴承的具体尺寸,并对各部分的材料进行了选择,给出了样机的具体模型。推导了永磁偏置磁悬浮轴承的数学模型,根据等效磁路理论,结合数学模型用Matlab/Simulink软件构建磁悬浮轴承的仿真模型,仿真所得数据与计算数据相吻合,验证了仿真模型的正确性,并用此模型对电磁力之间的耦合进行了分析,为控制系统的设计奠定基础。用电涡流式位置传感器对转子位置进行测量。介绍了电涡流传感器的原理,并设计了电涡流式位置传感器对转子位置检测的结构示意图,阐述其测量的工作原理,安装过程,给出了电涡流传感器对转子位置检测的电路图以及整个永磁偏置磁悬浮轴承的安装示意图。采用全桥式电路作为控制绕组的基本形式,并用混合型功率放大器作为永磁偏置磁悬浮轴承的功率执行器件。用Multisim10.0软件对混合型功率放大器的性能进行仿真。仿真结果表明,混合型功率放大器对阶跃信号和正弦信号有很好的跟随特性,满足磁悬浮轴承对功率放大器的要求。
[Abstract]:Magnetic bearing suspends the rotor in the air by magnetic force so that there is no mechanical contact between the rotor and the stator. As a kind of magnetic bearing, the permanent magnet bias magnetic bearing has become a hot spot of experts and scholars all over the world. Compared with active maglev bearing, permanent magnetic flux is used instead of electrically excited flux as bias flux, which reduces the current in control winding, reduces the number of power devices and heat dissipation area, reduces the loss and improves the efficiency. In this paper, the structure of a permanent magnet bias magnetic bearing is studied. Its working principle is introduced, the equivalent magnetic circuit of the whole permanent magnet bias magnetic suspension bearing is deduced, and the electromagnetic parameters in the magnetic circuit are calculated. According to the calculation results of electromagnetic parameters, the size of permanent magnet bias magnetic bearing is designed, and the material of each part is selected, and the concrete model of the prototype is given. The mathematical model of permanent magnet bias magnetic bearing is deduced. According to the theory of equivalent magnetic circuit, the simulation model of magnetic suspension bearing is constructed by using Matlab / Simulink software. The simulation data agree with the calculated data, and the correctness of the simulation model is verified. The coupling between electromagnetic forces is analyzed by this model, which lays a foundation for the design of control system. The rotor position is measured by eddy current position sensor. The principle of eddy current sensor is introduced, and the structure diagram of eddy current position sensor for rotor position detection is designed. The working principle and installation process of eddy current sensor are described. The circuit diagram of rotor position detection by eddy current sensor and the installation diagram of the permanent magnet bias magnetic suspension bearing are given. The full-bridge circuit is used as the basic form of control winding and the hybrid power amplifier is used as the power executive device of permanent magnet bias magnetic bearing. The performance of hybrid power amplifier is simulated with Multisim10.0 software. The simulation results show that the hybrid power amplifier can follow the step signal and sinusoidal signal well and meet the requirements of the magnetic bearing for the power amplifier.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH133.3

【引证文献】