Digital Current Loop for Permanent Magnet Linear Synchronous Motor Based on DSP and FPGA

Abstract:

In the high-precision servo control system of permanent magnet linear synchronous motor (PMLSM), the regulation of current loop has a direct effect on the control performances such as accuracy, response speed etc. In order to improve the control performances, a digital current loop control scheme based on DSP and FPGA is presented in this paper. FPGA is used to collect data, while DSP is for completing parallel collection of the input signals read and written from FPGA. P control, P uniting feed-forward compensation control and variable proportional gain control are investigated. Since the method of variable proportional gain can easily meet the requirement of current static error and quick response under different frequencies, PI control can basically eliminate the static error. With rotor initial positioning method, the current closed-loop control is proposed and compared with current open-loop control.

• Periodical: Applied Mechanics and Materials (Volumes 416-417)
• Pages: 686-691
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.416-417.686
• Online since: September 2013
• Authors: Yong Zhang, Xin Min Zhang, Qin Fen Lu, Yi Chen, Yun Yue Ye
• Keywords: Digital Current Loop Control, Digital Signal Processor (DSP), Field-Programmable Gate Array (FPGA), Linear Synchronous Motor, PI Control

References

[1] Michael S.W. Tam, Norbert C. Cheung, A robust fully-digital drive for linear permanent magnet synchronous motor, 2004 First International Conference on  Power Electronics Systems and Applications, Proceedings. pp.188-193, Nov (2004).

[2] Ying-shieh Kung, Design and implementation of a high-performance PMLSM drives using DSP chip, IEEE Transactions on Industrial Electronics, Vol. 55, No. 55, pp.1341-1351, March (2008).

DOI: 10.1109/tie.2007.909736

[3] Ying-Shieh Kung, Ming-Hung Tsai, Chia-Sheng Chen, FPGA-based servo control IC for PMLSM drives with adaptive fuzzy control, 1ST IEEE Conference on Industrial Electronics and Applications, pp.1-6, May (2006).

DOI: 10.1109/iciea.2006.257185

[4] Fernando Briz, David Diaz-Reigosa, Michael W. Degner*, Pablo Garcia, Juan Manuel Guerrero, Current Sampling and Measurement in PWM Operated AC Drives and Power Converters, Power Electronics Conference (IPEC),  pp.2753-2760, June (2010).

DOI: 10.1109/ipec.2010.5543175

[5] Raymond B. Sepe, Jeffrey H. Lang, Real-Time Adaptive Control of the Permanent-Magnet Synchronous Motor, IEEE Transactions on Industry Applications, pp.706-714, Jul/Aug (1991).

DOI: 10.1109/28.85486

[6] *Ying-Shieh Kung, Ming-Hung Tsai, Chia-Sheng Chen, FPGA-based servo control IC for PMLSM drives with adaptive Fuzzy control, 2006 1 ST IEEE Conference on Industrial Electronics and Applications, pp.1-6, May (2006).

DOI: 10.1109/iciea.2006.257185

[7] M. Zhuang, D.P. Ahterton, Automatic tuning of optimum PID controllers, IEE Proceedings D on Control Theory and Applications, pp.216-224, (1993).

DOI: 10.1049/ip-d.1993.0030