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Novel AC Servo Rotating and linear Composite Driving Device for Plastic Forming Equipment

Chinese Journal of Mechanical Engineering 2017年第4期30卷 843-853页

作者： Jin-Tao Liang Sheng-Dun Zhao Yong-Yi Li Mu-Zhi Zhu School of Mechanical Engineering Xi'an Jiaotong UniversityXi'an 710049China School of Mechano-electronic Engineering Xidian UniversityXi'an 710071China Beijing Institute of Space Launch Technology Beijing 100076China

The existing plastic forming equipment are mostly driven by traditional AC motors with long trans- mission chains, low efficiency, large size, low precision and poor dynamic response are the common disadvantages. In order to realize high performance forming processes, the driving device should be improved, especially for com- plicated processing motions. Based on electric servo direct drive technology, a novel AC servo rotating and linear composite driving device is proposed, which features implementing both spindle rotation and feed motion with- out transmission, so that compact structure and precise control can be achieved. Flux switching topology is employed in the rotating drive component for strong robustness, and fractional slot is employed in the linear direct drive component for large force capability. Then the mechanical structure for compositing rotation and linear motion is designed. A device prototype is manufactured, machining of each component and the whole assembly are presented respectively. Commercial servo amplifiers are utilized to construct the control system of the proposed device. To validate the effectiveness of the proposed composite driving device, experimental study on thedynamic test benches are conducted. The results indicate that the output torque can attain to 420 N-m and the dynamic tracking errors are less than about 0.3 rad in the rotating drive, the dynamic tracking errors are less than about 1.6 mm in the linear feed. The proposed research provides a method to construct high efficiency and accu- racy direct driving device in plastic forming equipment.

关键词： Plastic forming Direct drive - Permanentmagnet motor linear feeding Servo control

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