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| Equivalent Mathematical Models of Switching Power Amplifier for Magnetic Bearing |
| Wang Jun, Xu Longxiang |
| Nanjing University of Aeronautics and Astronautics Nanjing 210016 China |
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Abstract Power amplifier of magnetic bearing is a switching system. In order to design a circuit, it is necessary to accurately analyze the actual characteristics of switching power amplifier. Based on the three-level PWM operating principle of output load current, mathematical models of switching power amplifier are deduced and the equations of output load current are derived by using the Fourier series theory. The simulations of mathematical models and equations are implemented. Three kinds of results are basically the same by comparing the model simulation results with the Orcad circuit simulation results and experimental results. All of results show that the model is feasible and effective. The high speed magnetic suspension motor which uses these designed three-level power amplifiers runs successfully at 60 000r/min.
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Received: 20 June 2009
Published: 04 March 2014
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[1] 王继强, 王凤翔, 孔晓光. 高速永磁发电机的设计与电磁性能分析[J]. 中国电机工程学报, 2008, 28(20): 105-110.
[2] 王继强, 王凤翔, 宗鸣. 高速电机磁力轴承-转子系统临界转速的计算[J]. 中国电机工程学报, 2007, 27(27): 94-98.
[3] Xu Yanliang, Fang Jiancheng. Development of low power loss energy storage flywheel[J]. Transactions of China Electrotechnical Society, 2008, 23(12): 11-16.
[4] Wang Fengxiang, Zong Ming, Zheng Wenpeng, et al. Design features of high speed PM machine[C]. ICEMS, Beijing, 2003: 66-70.
[5] 曾学明, 徐龙祥, 刘正埙. 电磁轴承三电平PWM 功率放大器研究[J]. 电力电子技术, 2002, 36(3): 13-15.
[6] 臧晓敏, 王晓琳, 仇志坚, 等. 一种改进的基于采样-保持策略磁轴承用电流三态调制开关功放[J]. 电工技术学报, 2004, 19(10): 85-90.
[7] 臧晓敏, 王晓琳, 仇志坚, 等. 磁轴承开关功放中电流三态调制技术的研究[J]. 中国电机工程学报, 2004, 24(9): 167-172.
[8] 张亮, 房建成. 电磁轴承脉宽调制型开关功放的实现及电流纹波分析[J]. 电工技术学报, 2007, 22(3): 13-20.
[9] 王军, 徐龙祥. 磁悬浮轴承并联谐振直流环节开关功率放大器[J]. 中国电机工程学报, 2009, 29(12): 87-92.
[10] Buding P K, Werner R. Stiffness of magnetic bearings[C]. Proceedings of the 4th International Symposium on Magnetic Bearings, ETH, Zurich, 1994: 251-255.
[11] 张亮, 房建成. 基于MATLAB的电磁轴承开关功放建模与仿真研究[J]. 系统仿真学报, 2007, 19(11): 2395-2398.
[12] 张亮, 房建成. 电磁轴承开关功放的谐波模型仿真与实验研究[J]. 中国电机工程学报, 2007, 27(21): 95-100.
[13] Wang Jun, Xu Longxiang. System model of three-level switching power amplifier for magnetic bearing[C]. ICMTMA, Zhangjiajie, 2009. |
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2010, Vol. 25 
