Affiliations: [a] School of Mechanical Engineering, Shenyang University of Technology, Shenyang, China | [b] Department of Mechanical Engineering, Nippon Institute of Technology, Saitama, Japan
Correspondence:
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Corresponding author: Feng Sun, School of Mechanical Engineering, Shenyang University of Technology, No. 111, Shenliao West Road, Economic & Technological Development Zone, Shenyang, 110870, China. E-mail: sunfeng@sut.edu.cn
Abstract: This paper proposes a computation method using the equivalent magnetic circuit to analyze the driving force for the non-contact permanent magnet linear drive system. In this device, the magnetic driving force is related to the rotation angle of driving wheels. The relationship is verified by finite element analysis and measuring experiments. The result of finite element simulation is in good agreement with the model established by the equivalent magnetic circuit. Then experiments of displacement control are carried out to test the dynamic characteristic of this system. The controller of the system adopts the combination control of displacement and angle. The results indicate that the system has good performance in steady-state error and response speed, while the maximum overshoot needs to be reduced.
Keywords: Permanent magnet, linear drive, equivalent magnetic circuit, magnetic force, PID controller
