Title: DSP-based PMSM drive design for electric injection moulding machines

Authors: Ming-Shyan Wang

Addresses: Robot and Servo Drive Lab, Department of Electrical Engineering, Southern Taiwan University, No. 1, Nan-Tai Street, Yung-Kang City, Tainan County, 710 Taiwan, ROC

Abstract: The paper is focused on DSP-based drive design of Permanent Magnet Synchronous Motors (PMSMs) and its application to electric injection moulding machines. An in-parallel interlaced sample-and-hold structure is proposed to improve accuracy of low-velocity computing due to low-resolution encoders. The simple but effective PI control whose gains are individually tuned by Bode diagram and an extension of frequency zone-based method is employed for compatibility with conventional ones. Pressure drop at the v/p transfer point in injection process is overcome by adaptive fuzzy control. Finally, an emulation system including PMSM coupled by a lead screw validates the proposed algorithms.

Keywords: injection moulding machines; in-parallel interlaced sample-and-hold structure; adaptive control; fuzzy control; digital signal processing; DSP; permanent magnet synchronous motors; PMSM drive design.

DOI: 10.1504/IJCAT.2009.027856

International Journal of Computer Applications in Technology, 2009 Vol.36 No.2, pp.83 - 90

Available online: 13 Aug 2009 *

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