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High-speed positioning of ultrahigh-acceleration and high-velocity linear synchronous motor

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Abstract

This paper describes the high-speed positioning of a moving permanent magnet linear synchronous motor (MPM LSM) utilizing its high thrust-to-mover mass ratio of 908 N/kg. The MPM LSM was designed to have a high static thrust-to-mover mass ratio for high-acceleration and high-velocity motion However, the MPM LSM has large inductances and large back electromotive force (EMF), both of which slow down the current response and greatly reduce the available thrust force. Under the limited supply voltage condition, these features deteriorate the response of the MPM LSM, as represented by the acceleration and velocity characteristics. To reduce the effect of the features on the response, a simple and basic dynamic model of the MPM LSM is derived and used in the design of a phase lead function for the high response. The effectiveness of the phase lead function, which improved the response, is examined by straight motion and positioning experiments. The high-speed positioning performance is verified by using the control system with the phase lead function. The experimental response to a step input of 300 mm shows acceleration higher than 500 m/s2, velocity higher than 7.76 m/s and position error smaller than 2 mm.

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Authors and Affiliations

  1. Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Yokohama, 226-8502, Japan

    Kaiji Sato & Tadashi Hama

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  1. Kaiji Sato
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  2. Tadashi Hama
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Sato, K., Hama, T. High-speed positioning of ultrahigh-acceleration and high-velocity linear synchronous motor. Int. J. Precis. Eng. Manuf. 15, 1537–1544 (2014). https://doi.org/10.1007/s12541-014-0502-y

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  • DOI: https://doi.org/10.1007/s12541-014-0502-y

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