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.
International Journal of Computer Applications in Technology, 2009 Vol.36 No.2, pp.83 - 90
Published online: 13 Aug 2009 *Full-text access for editors Access for subscribers Purchase this article Comment on this article