High-Speed Brushless DC Motor Current-Loop Sampling System Design for Three-Axis Turntable


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Brushless DC motor (BLDCM) is adopted in the driving of a three-axis turntable. A high-speed current sampling system plays a vital role in intelligent control. This article firstly describes the working principle of a triple-closed-loop regulation system and emphatically dissects the characteristic of the current-loop among speed-loop and position-loop. Secondly, a signal acquisition-alignment circuit of three phases’ current and voltage is designed. Based on ADS8365, a scheme of high-speed current loop’s precise and synchronous sampling system is provided. Finally, experimental results have proved the validity and practicality of the scheme applied in the control of three-axis turntable.



Edited by:

Abdel Hamid Ismail Mourad and József Kázmér Tar






G. D. Liu et al., "High-Speed Brushless DC Motor Current-Loop Sampling System Design for Three-Axis Turntable", Applied Mechanics and Materials, Vol. 527, pp. 252-258, 2014

Online since:

February 2014




* - Corresponding Author

[1] G.D. Liu, B. Mo, H.W. Zhu, J. Lin: High Precision Brushless DC Motor Position Feedback Technology for Three-axis Turntable, The 8th International Conference On Intelligent Systems And Knowledge Engineering (ISKE2013), (2013).

DOI: 10.1007/978-3-642-54927-4_101

[2] C.X. Sun, B. Mo: Design of Control System of Brushless DC Motor Based on DSP, Proceedings of the 2012 International Conference on Communication Systems and Network Technologies (CSNT 2012), pp.683-7, (2012).

[3] C.L. Xia. Control System of BLDCM. Beijing: Science Press, pp.204-208, (2009).

[4] Datasheet of ADS8365, Information on http: /www. ti. com/product/ads8365.

[5] F. Li, Y.H. Wu, J.F. Wu, H.W. Li: Research of High Precision Blushless DC Motor Current Sampling Method, Power Electronics, Vol. 44, No. 5, May, (2010).

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