Frontiers of Mechanical Engineering >
System construction of a four-side primary permanent-magnet linear motor drive mechanical press
Received date: 02 Nov 2019
Accepted date: 08 Jun 2020
Published date: 15 Dec 2020
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A primary permanent-magnet linear motor (PPMLM) has a robust secondary structure and high force density and is appropriate for direct-drive mechanical press. The structure of a four-side PPMLM drive press is presented based on our previous research. The entire press control system is constructed to realize various flexible forming processes. The control system scheme is determined in accordance with the mathematical model of PPMLM, and active disturbance rejection control is implemented in the servo controller. Field-circuit coupling simulation is applied to estimate the system’s performance. Then, a press prototype with 6 kN nominal force is fabricated, and the hardware platform of the control system is constructed for experimental study. Punch strokes with 0.06 m displacement are implemented at trapezoidal speeds of 0.1 and 0.2 m/s; the dynamic position tracking errors are less than 0.45 and 0.82 mm, respectively. Afterward, continuous reciprocating strokes are performed, and the positioning errors at the bottom dead center are less than 0.015 mm. Complex pulse trajectories are also achieved. The proposed PPMLM drive press exhibits a fast dynamic response and favorable tracking precision and is suitable for various forming processes.
Jintao LIANG , Zhengfeng MING , Peida LI . System construction of a four-side primary permanent-magnet linear motor drive mechanical press[J]. Frontiers of Mechanical Engineering, 2020 , 15(4) : 600 -609 . DOI: 10.1007/s11465-020-0597-z
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