Optimization of T-shaped Suspension Magnetic Ring for Vertical Axis Wind Turbine
Keywords:3 DOF, magnetic bearing, stability, Tshaped magnetic ring group
Aiming at realizing breeze startup, light wind power generation, a novel T-shaped group of passive magnetic bearing (PMB) with three rings high suspension characteristics was proposed to increase the utilization of wind energy and improve the suspension characteristics of passive bearings. The inner magnetic ring of the T-shaped magnetic ring group adopts an oblique 45° polarization method, which can simultaneously balance radial force and axial force with high suspension characteristics. The static characteristics of the T-shaped magnetic ring group are compared with the traditional double rings which dynamic disturbance characteristics were analyzed in three degrees of freedom (DOF) and the parameters are optimized to achieve the optimal suspension characteristics through methods of Taguchi, response surface with mathematical model. The study shows that the capacity of T-shaped magnetic ring group is 2.5 times which can balance axial force and radial force simultaneously with 40% increase in volume than the double ring. The capacity of T-shaped magnetic ring group is increased by 33.6% and the stiffness is increased by 33.7% after optimized, which meets the requirements of suspension characteristics. When the bearing is disturbed in 3 DOF operation, the stable running state of the bearing can still be maintained due to its selfstabilizing system. It provides a reference for the suspension characteristics of the vertical axis wind turbine suspension system.
Z. Weiyu, “Study on key technologies and applications of magnetic bearings”, Transactions of China Electrotechnical Society, vol. 30, no. 12, pp. 11-20, 2015.
Sunyang, “The design of flywheel energy storage system controller based on DSP+FPGA,” Hangzhou: Zhejiang University, 2018.
Liusijia, “A rotor position control system of the vertical magnetic bearing based on linear induction motors,” Beijin: Beijing Jiaotong University, 2017.
G. Goncalves Sotelo, “Magnetic bearing sets for a flywheel system,” IEEE Transactions on Applied Super-conductivity, vol. 17, no. 2, pp. 2150-2153, 2007.
R. Moser, “Optimization of repulsive passive magnetic bearings,” IEEE Transactions on Magnetics, vol. 42, no. 8, pp. 2038-2042, 2006.
G. H. Jang and J. S. Park, “Development of a highly efficient hard disk drive spindle motor with a passive magnetic thrust bearing and a hydrodynamic journal bearing,” Appl. Phys., vol. 97, no. 10, pp. 507-507, 2005.
X. Tang and Z. Yun, “The design of the magnetic and hydraulic suspension system on an axial blood pump and the analysis of its mechanical properties,” IEEE 2nd Advanced Information Technology, Electronic and Automation Control Conference (IAEAC), IEEE, Chongqing, 2017.
H. Silu, C. Hu, and H. Lingduo, “Current loop analysis of magnetic suspension controller for magnetic suspension bearing,” Information Technology, Networking, Electronic and Automation Control Conference, IEEE, Chongqing, 2016.
L. L. Zhang and J. H. Huang, “Stability analysis for a flywheel supported on magnetic bearings with delayed feedback control,” The Applied Computational Electromagnetics Society, vol. 32, no. 8, pp. 642-649, 2017.
J. J. Pérez-Loya, C. J. D. Abrahamsson, F. Evestedt, and U. Lundin, “Performance tests of a permanent magnet thrust bearing for a hydropower synchronous generator test-rig,” The Applied Computational Electromagnetics Society, vol. 32, no. 8, pp. 407-411, 2017.
P. Puentener, “Homopolar bearingless slice motor in temple design,” International Electric Machines and Drives Conference, IEEE, Miami, 2017.
G. Wu and X. Wang, “Design and analysis of a novel axial actively regulated slotless skew winding bearingless motor,” International Conference on Mechatronics and Automation (ICMA), IEEE, Beijing, 2015.
J.-P. Yonnet, G. Lemarquand, S. Hemmerlin, and E. Olivier-Rulliere, “Stacked structures of passive magnetic bearings,” Appl. Phys., vol. 70, pp. 6633, 1991.
D. Kevin, “Stable levitation of a passive magnetic bearing,” IEEE Transactions on Magnetics, vol. 49, no. 1, pp. 609-617, 2013.
E. Marth, “A 2-D-based analytical method for calculating permanent magnetic ring bearings with arbitrary magnetization and its application to optimal bearing design,” IEEE Transactions on Magnetics, vol. 50, no. 50, 7400308, 2014.
N. Tănase, “Passive magnetic bearings for flywheel energy storage - Numerical design, passive magnetic bearings design,” International Conference on Applied and Theoretical Electricity, Craiova, IEEE, 2014.
J. Sun and D. Chen, “Stiffness measurement method of repulsive passive magnetic bearing in SGMSCMG,” IEEE Transactions on Instrumentation and Measurement, vol. 62, no. 11, pp. 2960- 2965, 2013.
G. Goncalves Sotelo, “Magnetic bearing sets for a flywheel system,” IEEE Transactions on Applied Superconductivity, vol. 17, no. 2 pp. 2150-2153, 2007.
R. Ravaud, G. Lemarquand, and V. Lemarquand, “Halbach structures for permanent magnets bearings,” Prog. Electromagn., vol. 14, pp. 263-277, 2007.
R. Ravaud, “Force and stiffness of passive magnetic bearings using permanent magnets. Part 1: Axial magnetization,” IEEE Transactions on Magnetics, vol. 45, no. 7, pp. 2996-3002, 2009.
M. Alizadeh Tir, “Design of a new structure passive magnetic bearing with radial magnetization using FEM,” The 22nd Iranian Conference on Electrical Engineering, IEEE, Tehran, 2014.
M. Alizadeh Tir, “A novel structure of passive magnetic bearing with axial magnetization,” The 5th Power Electronics, Drive Systems and Technologies Conference, IEEE, Tehran, 2014.
N. Tănase and A. M. Morega, “Radial-axial passive magnetic bearing system Numerical simulation aided design solutions,” The 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE), IEEE, Bucharest, 2015.
R. Muscia, “Magneto-nechanical model of passive magnetic axial bearings versus the eccentricity error, Part II: Application and results,” The Applied Computational Electromagnetics Society, vol. 32, no. 8, pp. 678-684, 2017.
A. Mystkowski and E. Pawluszewicz, “Nonlinear position-flux zero-bias control for AMB system with disturbance,” The Applied Computational Electromagnetics Society, vol. 32, no. 8, pp. 650- 656, 2017.
Liuhuijun, “Small axial flux vertical axis wind generators and characteristic research,” Jiaozuo: Henan Polytechnic University, 2016.