The Design and Research of Switching Power Amplifier Used on Magnetic Suspension Support

Abstract:

This paper focuses on the switching power amplifier of magnetic suspension support. The principle of magnetic suspension support was described. Due to the particularity that the load of magnetic suspension support is inductive, the response speed, efficiency and stability should be considered when the switching power amplifier is designed. In the power amplifier, PI circuit can make feedback current follow the given signal in time. In this paper, the amplifier adopts pulse width modulation (PWM) control strategy. The design of PI circuit, PWM circuit as well as the driving circuit were presented in the paper. After completing the designs of all parts, we choose MULTISIM as simulation software, which can establish an accurate circuit model. The simulation results show that the switching power amplifier designed in this paper has bigger bandwidth and less distortion and it can respond timely.

• Periodical: Applied Mechanics and Materials (Volume 150)
• Pages: 194-198
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.150.194
• Online since: January 2012
• Authors: Zhao Yuan Wang, Guo Qing Wu
• Keywords: Magnetic Suspension Support, MULTISIM, Simulation, Switching Power Amplifier

References

[1] G.Q. Wu, X.P. Wang, G. Zhang: Magnetic Suspension Supporting System and Its Control Technology Used for Numerical Control Machine (Ph.D. Shanghai university, China 2006), pp.10-18(In Chinese).

[2] Y.F. Hu,Z.D. Zhu Z.F. Jiang: Basic theory and application of magnetic bearings(China Machine Press, China 2006) (In Chinese).

[3] H.G. Kang, D.Q. Chen: Power technology base simulation part( China Higher Education Press, China 2004) (In Chinese).

[4] Changsheng Zhu, Yang Cao, Dan Zhou: A Current-Control Mode Three-Level PWM Switching Power Amplifier for Active Magnetic Bearings (Electrical Machines and Systems, ICEMS 2008), p.2217~2220.

DOI: 10.1109/icems.2005.202812

[5] Schweitzer G, et al: Active Magnetic Bearing (Hocheschulvelag AG an der ETH Zuiich, 1994).

[6] Z.A. Wang, J. Huang. Power electronic technology (China Mechanical Industry Press, China 2007) (In Chinese).

[7] H.T. Dong. Design and Simulation on the Power Amplifier of Active Magnetic Bearings (Ph.M., Wuhan University of Technology, China 2006 ), pp.43-48(In Chinese).