Stiffness analysis and levitation force control of the active magnetic bearing for a partially-self-bearing flywheel system
Stiffness analysis and levitation force control of the active magnetic bearing for a partially-self-bearing flywheel system
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DOI：
10.3233/jae-2011-1362
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发表时间：
2010-12
期刊：
影响因子：
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通讯作者：
C. Zhang;T.D. Nguyen;K. Tseng;S. Zhang
中科院分区：
文献类型：
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作者：
C. Zhang;T.D. Nguyen;K. Tseng;S. Zhang
提出了一种由轴向磁通部分自轴承永磁电机辅助的紧凑型飞轮储能系统。提出的机器将轴向磁轴承和运动功能结合到一个单一的磁致动器中，它不仅可以旋转转子飞轮，还可以产生悬浮力来克服重力。建立了主动磁轴承悬浮力和刚度的数学模型。研究了系统刚度与关键电机参数的关系。特殊的电机设计可实现高刚度。通过有限元分析验证了所建立的受力模型。设计了悬浮力控制系统，搭建了实验装置。试验结果证明了数学分析的正确性和所设计控制系统的可行性。
A compact flywheel energy storage system assisted by axial-flux partially-self-bearing permanent magnet motor has been proposed by the authors. The proposed machine combines axial magnetic bearing and motoring functionality into a single magnetic actuator, which not only spins the rotor-flywheel but also generates a levitation force to overcome the gravity. The mathematical model of the levitation force and stiffness of the active magnetic bearing are developed. The relationships between the stiffness and the key motor parameters are studied. High stiffness can be achieved for the special motor design. The derived force model is validated by finite element analysis. The control system of the levitation force is designed and experimental setup is built. The test results prove the correctness of the mathematical analysis and feasibility of the designed control system.