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Electromechanical integrated modeling and analysis for the direct-driven feed system in machine tools

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Abstract

The permanent magnet linear synchronous motor (PMLSM) feed system realizes the direct drive. All the intermediate mechanical transmission parts are canceled and then the motor mover is directly connected with the driven components. The interaction between servo system and mechanical system becomes more close and complex, affecting the dynamic performance of the direct-driven feed system. In this paper, the dynamic characteristics of the drive circuit, PMLSM, control loops, and mechanical system are analyzed, and then an electromechanical integrated modeling method for the direct-driven feed system is proposed. Firstly, the dynamic precision of the feed system and electromechanical analytical model is studied. Then the nonlinearities of the drive circuit and PMLSM are researched. The analytical expression of the motor thrust is derived. What is more, the mechanical dynamic model is set up using the Lagrange equation and the main forms of the vibrations are discussed. Finally, the electromechanical integrated model is established and the experiments are carried out to verify the theoretical results. The results show that the proposed integrated modeling method can accurately represent the dynamic precision of the direct-driven feed system, which can provide the theoretical foundation for analyzing the electromechanical couplings and compensation methods.

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Funding

This work is financially supported by the key project of the National Natural Science Funds (grant no. 51235009).

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Authors and Affiliations

  1. School of Mechanical Engineering, Xi’an Jiaotong University, Room A315 of North Side, The West No.5 Building, Qujiang Campus, No.99, Yanxiang Road, Xi’an, 710049, Shaanxi, China

    Xiaojun Yang, Dun Lu, Hui Liu & Wanhua Zhao

  2. State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, 710054, China

    Xiaojun Yang, Dun Lu, Hui Liu & Wanhua Zhao

Authors
  1. Xiaojun Yang
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  2. Dun Lu
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  3. Hui Liu
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  4. Wanhua Zhao
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Corresponding author

Correspondence to Wanhua Zhao.

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Yang, X., Lu, D., Liu, H. et al. Electromechanical integrated modeling and analysis for the direct-driven feed system in machine tools. Int J Adv Manuf Technol 98, 1591–1604 (2018). https://doi.org/10.1007/s00170-018-2186-4

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  • DOI: https://doi.org/10.1007/s00170-018-2186-4

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